Air Conditioner Having First Heat Exchange Channel Through Which First Air Flows and Second Heat Exchange Channel Through Which Second Air Flows Upward

REFERENCE TO RELATED APPLICATIONS

[0001]This is a by-pass continuation application of International Application No. PCT/JP2024/019187 filed on May 24, 2024 which claims priority from Japanese Patent Application No. 2023-095618 filed on Jun. 9, 2023. The entire contents of the International Application and the priority application are incorporated herein by reference.

BACKGROUND ART

[0002]A known air conditioner includes a housing, a first channel, a second channel, a tank unit, a cooling unit, a water supply channel, and a water recovery channel. A first outlet and a second outlet are formed on the housing. The first channel is in communication with the first outlet port. The second channel is in communication with the second outlet port. The tank unit is configured to retain water for cooling a first air which flows through the first channel and a second air which flows through the second channel. The cooling unit is configured to cool the first air with heat of vaporization of the water retained in the tank unit. The cooling unit includes a heat exchanger and a vaporization filter. The heat exchanger is configured to cool the second air by heat exchange with the water supplied from the tank unit, and to cool the first air by heat exchange between the cooled second air and the first air. The vaporization filter is configured to cool the first air with latent heat of the water supplied from the tank unit. The water supply channel allows water retained in the tank unit to be supplied to the cooling unit through the water supply channel. The water recovery channel allows water that has remained in the cooling unit to be collected in the tank unit.

SUMMARY

[0003]In the known heat exchanger described above, the second air passes through the lower portion in the heat exchanger after flowing downward from upward in the heat exchanger along the second channel, flows upward, and is blown out through the second outlet port formed on the upper surface of the housing. The second channel has a portion folded back in a U-shape. This configuration may cause an increase in the pressure loss of the second air.

[0004]In view of the foregoing, it is an object of the present disclosure to provide an air conditioner in which the pressure loss of a second air flowing through a heat exchanger is reduced than before.

[0005]In order to attain the above and other object, the present disclosure provides an air conditioner including: a housing; a first intake port through which a first air is drawn into the housing; a second intake port through which a second air is drawn into the housing; a heat exchanger; a vaporization filter; a first outlet port through which the first air drawn through the first intake port and flowing through the first heat exchange channel of the heat exchanger and the vaporization filter is blown out of the housing; and a second outlet port through which the second air drawn through the second intake port and flowing upward through the second heat exchange channel is blown out of the housing. The housing includes a first side wall. The first intake port is arranged on the first side wall of the housing. The second intake port is arranged on the first side wall. The heat exchanger has: a first heat exchange channel through which the first air drawn through the first intake port flows; and a second heat exchange channel through which the second air drawn through the second intake port flows upward and to which water is supplied. The vaporization filter is configured to cool the first air with latent heat of water. The first outlet port is arranged on the housing. The second outlet port is arranged on the housing at a position further upward relative to an outlet of the second heat exchange channel of the heat exchanger.

[0006]In the above structure, a direction in which the second air flows through the second heat exchange channel coincides with a direction in which the second outlet port is arranged relative to the outlet of the second heat exchange channel of the heat exchanger. Therefore, the air conditioner enables the second air to flow through the second heat exchange channel upward to the second outlet port, thereby reducing the pressure loss of the second air than known technologies. Further, since the first intake port and the second intake port are arranged on the same first side wall, the configuration inside the housing can be simplified in comparison with a case in which the first intake port and the second intake port are arranged on different side walls, thereby contributing to reducing the size of the housing.

BRIEF DESCRIPTION OF DRAWINGS

[0007]FIG. 1 is a perspective view of an air conditioner 1 in which a drawer body 7 is in an accommodated position Q1.

[0008]FIG. 2 is a perspective view of the air conditioner 1 in which the drawer body 7 is in a drawn-out position Q2.

[0009]FIG. 3 is a perspective view of the air conditioner 1 with a third side wall 23 omitted, and illustrating a state in which an air filter 60, a heat exchanger 4, and a vaporization filter 6 are removed from the drawer body 7 in the drawn-out position Q2.

[0010]FIG. 4 is a right-side view of the drawer body 7 in which the air filter 60, the heat exchanger 4, and the vaporization filter 6 are mounted.

[0011]FIG. 5 is a plan view of the drawer body 7 in which the air filter 60, the heat exchanger 4, and the vaporization filter 6 are mounted.

[0012]FIG. 6 is a perspective view of the drawer body 7 in which the air filter 60, the heat exchanger 4, and the vaporization filter 6 are mounted.

[0013]FIG. 7 is a perspective view of the heat exchanger 4.

[0014]FIG. 8 is a perspective view of the vaporization filter 6.

[0015]FIG. 9 is a perspective view of the drawer body 7 in which the air filter 60 is mounted and from which the heat exchanger 4 and the vaporization filter 6 are removed.

[0016]FIG. 10 is a perspective view of a first drain pan 81.

[0017]FIG. 11 is a cross-sectional view taken along line XI-XI in FIG. 2.

[0018]FIG. 12 is a cross-sectional view taken along line XII-XII in FIG. 1.

[0019]FIG. 13 is a perspective view of the air conditioner 1 from which a first tank 201 and a second tank 202 are removed.

[0020]FIG. 14 is a cross-sectional view taken along line XIV-XIV in FIG. 13.

[0021]FIG. 15 is a perspective view of the first tank 201 and the second tank 202.

[0022]FIG. 16 is another perspective view of the air conditioner 1 from which the first tank 201 and the second tank 202 are removed.

[0023]FIG. 17 is a perspective view illustrating the arrangement of a water supply unit 13 and a power supply harness 99 inside a housing 2.

[0024]FIG. 18 is a perspective view of a first piping 96, a second piping 97, and a third piping 98.

[0025]FIG. 19 is a right-side view of a second drain pan 181 and a second tank accommodating portion 239.

DESCRIPTION

[0026]Hereinafter, an embodiment of the present disclosure will be described. In the following description, a state in which an air conditioner 1 is placed as illustrated in FIG. 1 will be defined as the normal mode of usage of the air conditioner 1, and the terms “left”, “right”, “front”, “rear”, “up”, and “down” indicated with arrows in the drawings will be used. A left-right direction of the air conditioner 1 will also be referred to as a “width direction W of the air conditioner 1”, and the center of the air conditioner 1 in the width direction W will be referred to as a “center WM”. The method of fixing each component included in the air conditioner 1 can be suitably selected. For example, the components are fixed by way of welding, adhesion, or fixtures with fixing members. The fixing members are, for example, screws, bolts, and rivets.

[0027]The air conditioner 1 illustrated in FIG. 1 is, for example, an evaporative-cooling type air conditioner to be placed on a floor surface of a space to be air-conditioned, such as a factory. As illustrated in FIGS. 1 through 3, the air conditioner 1 includes a housing 2, rails 91 and 92, a drawer body 7, an air filter 60, and a cooling unit 3. The cooling unit 3 in the present embodiment includes a heat exchanger 4, and a vaporization filter 6. As illustrated in FIGS. 11, 12, and 17, the air conditioner 1 further includes a water storage container 20, a first tank accommodating portion 140, a second tank accommodating portion 39, an outlet piping 19, a drain pan 8, a channel forming portion 37, a water supply unit 13, pressing members 331 and 332, a first wall 35, a second wall 36, a first fan 101, a second fan 102, a fan motor 103, and a partition plate 105.

[0028]As illustrated in FIG. 1, the housing 2 includes a first side wall 21, a second side wall 22, a third side wall 23, a fourth side wall 24, an upper wall 25, and a lower wall 26. The housing 2 has a rectangular parallelepiped shape that is elongated in an up-down direction. The housing 2 is made of resin or metal. The first side wall 21 is the front wall and constitutes the front surface of the housing 2. The second side wall 22 is the rear wall opposite the first side wall 21, and constitutes the rear surface of the housing 2. The third side wall 23 is the right wall connected to both the first side wall 21 and the second side wall 22, and constitutes the right side surface of the housing 2. The fourth side wall 24 is the left wall opposite the third side wall 23, and constitutes the left side surface of the housing 2. The housing 2 accommodates the heat exchanger 4 and the water storage container 20.

[0029]A retrieving port 27 for retrieving each of a first tank 201 and a second tank 202 included in the water storage container 20 described later from the housing 2 is formed on the first side wall 21 of the housing 2. A drawer opening 28 is also formed on the first side wall 21 of the housing 2. The drawer opening 28 is arranged upward of the retrieving port 27 and is continuous with the retrieving port 27. The drawer opening 28 and the retrieving port 27 are an opening formed on the first side wall 21 and having a rectangular shape elongated in the up-down direction as a whole in a front view. The drawer body 7 described later is mounted in the drawer opening 28. An intake port 74 is formed on the first side wall 21 of the housing 2. In the housing 2 in the present embodiment, the intake port 74 is arranged on a decorative board 73 of the drawer body 7 mounted in the drawer opening 28. The intake port 74 is an example of the “first intake port”, is arranged on the first side wall 21, and allows a first air drawn into the housing 2 to flow through the intake port 74. The intake port 74 is also an example of the “second intake port”, is arranged on the first side wall 21, and allows a second air drawn into the housing 2 to flow through the intake port 74. Therefore, the intake port 74 is an intake port common for both the first air and the second air. Note that the first air and the second air, before drawn into the housing 2, are air in the space to be air-conditioned, i.e., the space in which the air conditioner 1 is placed. In other words, the intake port 74 allows air in the space to be air-conditioned to be drawn into the housing 2 as the first air and the second air. More specifically, the intake port 74 as the first intake port is an opening arranged on the first side wall 21 for drawing air in the space to be air-conditioned as the first air. Additionally, the intake port 74 as the second intake port is an opening arranged on the first side wall 21 for drawing air in the space to be air-conditioned as the second air.

[0030]A first outlet port 29 and a second outlet port 30 are formed on the upper wall 25 of the housing 2. The first outlet port 29 is arranged on the housing 2. The first outlet port 29 is an opening through which the first air drawn through the intake port 74 and flowing through first heat exchange channels R1 of the heat exchanger 4 and the vaporization filter 6 included in the cooling unit 3 described later is to be blown out of the housing 2. The second outlet port 30 is arranged on the housing 2 at a position further upward relative to an outlet 50 of second heat exchange channels R2 of the heat exchanger 4 described later illustrated in FIG. 5. The second outlet port 30 is an opening through which the second air drawn through the intake port 74 and flowing upward through the second heat exchange channels R2 is to be blown out of the housing 2. The second outlet port 30 is arranged at a position closer to the first side wall 21 than the first outlet port 29 is to the first side wall 21 in a front-rear direction along a first direction K1 in which the first air flows through the first heat exchange channels R1. The second outlet port 30 is arranged at a position overlapping the first outlet port 29 in the width direction W which is orthogonal to both the first direction K1 in which the first air flows through the first heat exchange channels R1 and a vertical direction, i.e. in the left-right direction. A tubular air supply duct 291 having flexibility is connected to the first outlet port 29. The orientation of the air supply duct 291 can be changed. Casters 89 are fixed to the respective four corners of the lower wall 26. As illustrated in FIGS. 3 and 14, props 281 through 284 extending in the up-down direction are arranged inside the housing 2. The prop 281 is arranged in the right-front corner portion, the prop 282 is arranged in the left-front corner portion, the prop 283 is arranged in the right-rear corner portion, and the prop 284 is arranged in the left-rear corner portion. Each of the upper wall 25 and the lower wall 26 extends horizontally. The lower wall 26 is connected to the lower end of each of the props 281 through 284. The upper wall 25 is connected to upper end of each of the props 281 through 284.

[0031]As illustrated in FIGS. 3 and 14, the rails 91 and 92 are configured to guide the movement of the drawer body 7. The rails 91 and 92 are metal plates extending in the front-rear direction. The rail 91 is arranged on the side of the fourth side wall 24, i.e., leftward, in the width direction W. The front end of the rail 91 is fixed to the prop 282 via a fixing plate 261, and the rear end of the rail 91 is fixed to the prop 284 via the fixing plate 261. The fixing plate 261 is a metal plate extending in the front-rear direction at a position leftward of the rail 91. The rail 92 is arranged on the side of the third side wall 23, i.e., rightward, in the width direction W. The front end of the rail 92 is fixed to the prop 281 via a fixing plate 262, and the rear end of the rail 92 is fixed to the prop 283 via the fixing plate 262. The fixing plate 262 is a metal plate extending in the front-rear direction at a position rightward of the rail 92. An engaging part 93 is fixed to the front end portion of the fixing plate 261. As illustrated in FIG. 12, the engaging part 93 is a metal plate protruding rightward from the front end portion of the fixing plate 261, and the right end of the engaging part 93 is bent upward. An engaging part 94 is fixed to the front end portion of the fixing plate 262. The engaging part 94 is a metal plate protruding leftward from the front end portion of the fixing plate 262, and the left end of the engaging part 94 is bent upward. The engaging parts 93 and 94 constitute a part of a regulating member 78 configured to regulate the drawer body 7 from moving from an accommodated position Q1 toward a drawn-out position Q2.

[0032]The drawer body 7 has the heat exchanger 4 mounted, and is movable between the accommodated position Q1 illustrated in FIG. 1 in which the heat exchanger 4 is positioned inside the housing 2, and the drawn-out position Q2 illustrated in FIG. 2 in which the heat exchanger 4 is positioned outside the housing 2. As illustrated in FIGS. 2 through 6, the drawer body 7 includes frames 71 and 72, the decorative board 73, and beam members 76 and 77. Engagement parts 79 and 80 are disposed on the drawer body 7.

[0033]As illustrated in FIGS. 4 through 6, the frames 71 and 72 are metal plates elongated in the front-rear direction. The end portions of the frames 71 and 72 on the side of the center WM in the width direction W are bent downward. The frame 71 is fitted in the rail 91, while the frame 72 is fitted in the rail 92. The decorative board 73 is connected to the downstream end portions of the frames 71 and 72 in a drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2. The drawn-out direction D in the present embodiment is a direction directed frontward from rearward, the upstream side of the drawn-out direction D is rearward, and the downstream side of the drawn-out direction D is frontward. The decorative board 73 extends in a direction crossing the longitudinal direction of the frames 71 and 72, i.e., in a direction crossing the front-rear direction. As illustrated in FIG. 1, in a state where the drawer body 7 is in the accommodated position Q1, the decorative board 73 constitutes an outer peripheral surface 200 of the air conditioner 1 in cooperation with the housing 2. The intake port 74 through which the first air drawn into the housing 2 flows is arranged on the decorative board 73. The intake port 74 has a lattice-frame shape. In the up-down direction, the frames 71 and 72 are connected to the rear surface of the decorative board 73 at a position downward of the position in which the intake port 74 is arranged. Flanges 731 and 732 protruding rearward are disposed on the rear surface of the decorative board 73. The flange 731 extends rearward from the left end portion of the rear surface of the decorative board 73. The flange 732 extends rearward from the right end portion of the rear surface of the decorative board 73. The upper ends of the flanges 731 and 732 are sloped downward as extending rearward. The lower ends of the flanges 731 and 732 are bent toward the center WM in the width direction W. The lengths of the flanges 731 and 732 in the front-rear direction are shorter than half the lengths of the frames 71 and 72 in the front-rear direction. A support plate 734 is disposed on the rear portion of the upper end of each of the flanges 731 and 732. The support plates 734 are positioned away from the decorative board 73 at positions upward of the intake port 74 in the up-down direction, and extend in parallel to the decorative board 73.

[0034]A drawer handle 70 is disposed on the decorative board 73 at a position downward of the intake port 74. The drawer handle 70 is to be operated when moving the drawer body 7. The drawer handle 70 has a rectangular shape elongated in the left-right direction in a front view and is recessed rearward. The drawer handle 70 is positioned downward of the frames 71 and 72 in the up-down direction. As illustrated in FIG. 6, the drawer handle 70 is connected to the engagement parts 79 and 80 via a switching mechanism 701. The switching mechanism 701 is configured to transmit operations of the drawer handle 70 to the engagement parts 79 and 80. In response to an operation performed by the user of the air conditioner 1, the drawer handle 70 switches the position of the engagement parts 79 and 80 disposed on the drawer body 7 between an engagement position in which the engagement parts 79 and 80 contact the respective engaging parts 93 and 94 and are engageable with the respective engaging parts 93 and 94, and a disengagement position in which the engagement parts 79 and 80 are separated from the respective engaging parts 93 and 94 and are not engageable with the respective engaging parts 93 and 94. The engagement parts 79 and 80 constitute a part of the regulating member 78. In other words, the regulating member 78 includes the engaging parts 93 and 94 arranged on the housing 2, and the engagement parts 79 and 80 arranged on the drawer body 7. Each of the engagement parts 79 and 80 is a metal plate having a L-shape in a plan view. The rear end portion of the engagement part 79 is bent leftward. The rear end portion of the engagement part 80 is bent rightward. The engagement parts 79 and 80 are positioned downward of a first drain pan 81, and are positioned further downward relative to the upper ends of the frames 71 and 72. The front end portion of the engagement part 79 is supported at a position leftward of the drawer handle 70 so that the engagement part 79 is pivotally movable about an axis extending in the up-down direction. The front end portion of the engagement part 80 is supported at a position rightward of the drawer handle 70 so that the engagement part 80 is pivotally movable about an axis extending in the up-down direction. In FIG. 6, the engagement parts 79 and 80 in the engagement position are depicted with solid lines, while the engagement parts 79 and 80 in the disengagement position are depicted with dotted lines. As illustrated in FIG. 12, the engagement part 79 inhibits the movement of the drawer body 7 in the drawn-out direction D in a state where the engagement part 79 is in engagement with the engaging part 93, and allows the movement of the drawer body 7 in the drawn-out direction D in a state where the engagement part 79 is not in engagement with the engaging part 93. Similarly, the engagement part 80 inhibits the movement of the drawer body 7 in the drawn-out direction D in a state where the engagement part 80 is in engagement with the engaging part 94, and allows the movement of the drawer body 7 in the drawn-out direction D in a state where the engagement part 80 is not in engagement with the engaging part 94.

[0035]As illustrated in FIGS. 4, 6, and 9, the beam member 76 connects the frame 71 and the decorative board 73 to each other, and the beam member 77 connects the frame 72 and the decorative board 73 to each other. The beam members 76 and 77 are metal plates. The longitudinal direction of the beam members 76 and 77 are elongated in a direction crossing both the extension surface of the decorative board 73 and the longitudinal direction of the frames 71 and 72. More specifically, the beam members 76 and 77 extend downward as extending rearward, i.e., diagonally downward and rearward. The beam member 76 is positioned between the flange 731 and the first drain pan 81 in the left-right direction. A front end portion 761 of the beam member 76 is bent toward the center WM in the width direction W, i.e., rightward, and is fixed to the rear surface of the decorative board 73. A rear end portion 762 of the beam member 76 is bent toward the center WM in the width direction W and is fixed to the frame 71. Similarly, the beam member 77 is positioned between the flange 732 and the first drain pan 81. A front end portion 771 of the beam member 77 is bent toward the center WM in the width direction W, i.e., leftward, and is fixed to the rear surface of the decorative board 73. A rear end portion 772 of the beam member 77 is bent toward the center WM in the width direction W and is fixed to the frame 72.

[0036]As illustrated in FIGS. 2 through 6, the drawer body 7 in the present embodiment supports the vaporization filter 6, the air filter 60, and an opposing wall 803 in addition to the heat exchanger 4. The opposing wall 803 opposes a first outer wall 54 of the heat exchanger 4 and a second outer wall 65 of the vaporization filter 6. The opposing wall 803 in the present embodiment is the right wall of the first drain pan 81. The heat exchanger 4, the vaporization filter 6, the air filter 60, and the opposing wall 803 are positioned between the flanges 731 and 732 and between the beam members 76 and 77 in the width direction W. The upper ends of the heat exchanger 4, the vaporization filter 6, and the air filter 60 are positioned further downward relative to the upper end of the decorative board 73 in the up-down direction. The lower ends of the heat exchanger 4, the vaporization filter 6, and the air filter 60 are positioned further upward relative to the lower end of the decorative board 73.

[0037]The air filter 60 is a filter having a rectangular shape in a plan view, and includes a filter 601, a frame 602, and a pair of left and right latches 603. The filter 601 is configured to collect dust in the air that has been drawn through the intake port 74 and to restrict dust from adhering the inside of the housing 2. The frame 602 has a rectangular shape and holds the filter 601. Each of the pair of latches 603 is bent rearward from the upper end of the frame 602. The air filter 60 is mounted in the drawer body 7 and is arranged between the intake port 74 and the heat exchanger 4. More specifically, the air filter 60 is inserted from above into a rectangular-shaped space in a plan view that is surrounded by the decorative board 73, the support plates 734, and the flanges 731 and 732. In a state where the air filter 60 is mounted in the drawer body 7, the pair of latches 603 contacts the upper ends of the respective support plates 734. The left and right ends of the frame 602 are interposed between support claws 737 disposed on the rear surface of the decorative board 73 and the decorative board 73 in the front-rear direction.

[0038]The cooling unit 3 is arranged inside the housing 2, and is configured to cool the air drawn from outside the housing 2 with heat of vaporization of water supplied from the outlet piping 19 described later illustrated in FIG. 11. The outlet piping 19 is connected to the second tank 202 of the water storage container 20 described later.

[0039]The heat exchanger 4 is configured to lower the atmospheric temperature using the water supplied from the water storage container 20 to cool the space to be air-conditioned. As illustrated in FIG. 7, the heat exchanger 4 includes partition walls 42 separating the first heat exchange channels R1 through which the first air flows, and the second heat exchange channels R2 through which the second air and the water supplied from the water storage container 20 flow. In the heat exchanger 4, the first heat exchange channels R1 through which the first air drawn through the intake port 74 flows, and the second heat exchange channels R2 through which the second air drawn through the intake port 74 flows upward and to which water is supplied are formed by the partition walls 42. As illustrated in FIG. 12, the first heat exchange channels R1 constitute a part of a first channel P1 extending from the intake port 74 to the first outlet port 29. The second heat exchange channels R2 constitute a part of a second channel P2 extending from the intake port 74 to the second outlet port 30.

[0040]As illustrated in FIG. 7, the heat exchanger 4 in the present embodiment includes a heat exchanger body 41, and a heat exchanger case 46 accommodating the heat exchanger body 41. The heat exchanger body 41 includes the partition walls 42 including a plurality of sheets 45, a plurality of spacers 43, and a plurality of spacers 44. Each of the plurality of sheets 45 is made of resin having heat conductivity or metal. On the upper end portions and the lower end portions of two of the sheets 45 adjacent to each other, two of the spacers 43 respectively extend in the front-rear direction from the front ends to the rear ends of the adjacent two sheets 45. The space surrounded by the adjacent two sheets 45 and the two spacers 43 positioned between the adjacent two sheets 45 serves as one of the first heat exchange channels R1. On the front end portions and the rear end portions of two of the sheets 45, which are different from the adjacent two sheets 45 between which two spacers 43 are interposed, two of the spacers 44 respectively extend in the up-down direction from the upper ends to the lower ends of the two sheets 45. The space surrounded by the adjacent two sheets 45 and the two spacers 44 positioned between the adjacent two sheets 45 serves as one of the second heat exchange channels R2. The plurality of sheets 45 are arranged at predetermined intervals in the left-right direction in a posture in which the surface having the largest area among a plurality of surfaces in each sheet 45 faces rightward. With this configuration, the first heat exchange channels R1 and the second heat exchange channels R2 are arranged alternately in the left-right direction. The predetermined intervals in the first heat exchange channels R1 are defined by the thickness of the spacers 43 in the left-right direction. The predetermined intervals in the second heat exchange channels R2 are defined by the thickness of the spacers 44 in the left-right direction.

[0041]The heat exchanger case 46 accommodates the heat exchanger body 41. The heat exchanger case 46 includes a cover portion 47, and a box body 53. The cover portion 47 has a rectangular frame shape in a plan view with the outlet 50 of the second heat exchange channels R2 formed. The outlet 50 has a rectangular shape in a plan view. The box body 53 has a box shape whose upper end is open. The portions in the vicinity of the four corners of the cover portion 47 are removably fixed to the upper end portion of the box body 53 by fixing members 471 through 474, respectively. The heat exchanger 4 includes a first contact part 51 and a second contact part 52 on the cover portion 47 of the heat exchanger case 46. The first contact part 51 is a portion protruding upward and arranged at the downstream end portion in the drawn-out direction D of an upper surface 48 of the heat exchanger 4, i.e., at the front end portion of the cover portion 47. The second contact part 52 is a portion protruding upward and arranged at the upstream end portion in the drawn-out direction D of the upper surface 48 of the heat exchanger 4, i.e., at the rear end portion of the cover portion 47. More specifically, each of the first contact part 51 and the second contact part 52 protrudes upward from the upper surface 48 of the heat exchanger 4 so as to be inclined upward as extending frontward. Each of the first contact part 51 and the second contact part 52 extends in the left-right direction from the left end to the right end of the heat exchanger 4. In the front-rear direction, the first contact part 51 is disposed frontward of the outlet 50, and the second contact part 52 is disposed rearward of the outlet 50. As illustrated in FIG. 12, in a state where the drawer body 7 is in the accommodated position Q1, the first contact part 51 contacts a cushion member 351 on the first wall 35 disposed on the housing 2. In a state where the drawer body 7 is in the accommodated position Q1, the second contact part 52 contacts a cushion member 361 on the second wall 36 disposed on the housing 2. The first contact part 51 and the second contact part 52 position the heat exchanger 4 in the front-rear direction to thereby restrict the second air that has flowed through the outlet 50 of the second heat exchange channels R2 from mixing with other air. As illustrated in FIGS. 4, 5, and 7, the heat exchanger 4 includes a flange part 49 at the upstream portion in the drawn-out direction D, i.e., the rear end portion of the heat exchanger 4. The flange part 49 contacts an upper surface 69 of the vaporization filter 6 described later. The flange part 49 in the present embodiment is disposed at the rear end of the cover portion 47 of the heat exchanger case 46. More specifically, the flange part 49 extends rearward from the rear end of the second contact part 52 along the upper surface 69 of the vaporization filter 6. The rear end of the flange part 49 is positioned further rearward relative to the rear end of the box body 53. The flange part 49 extends in the left-right direction from the left end to the right end of the heat exchanger 4. Flanges 581 and 582 are arranged on the cover portion 47. The flange 581 is a portion arranged on the left end portion of the cover portion 47 and protruding diagonally leftward and upward. The flange 582 is a portion arranged on the right end portion of the cover portion 47 protruding diagonally rightward and upward. In the left-right direction, the left end of the flange 581 is positioned further leftward relative to the heat exchanger case 46, and the right end of the flange 582 is positioned further rightward relative to the heat exchanger case 46. The flanges 581 and 582 restrict the second air that has flowed through the outlet 50 of the second heat exchange channels R2 from mixing with other air.

[0042]The heat exchanger 4 includes the first outer wall 54. The first outer wall 54 is the right wall of the box body 53 of the heat exchanger case 46. The first outer wall 54 has a first groove 55 in which first ribs 851 and 852 of the opposing wall 803 described later are fitted. The first groove 55 is constituted by ribs 551 and 552. The ribs 551 and 552 are protruding portions protruding rightward and extending upward from the lower end of the rear portion of the first outer wall 54. The rib 551 extends in the vertical direction. The rib 552 is arranged rearward of the rib 551 and extends diagonally relative to the vertical direction so as to be positioned rearward as extending downward. In other words, the interval between the ribs 551 and 552 in the front-rear direction is greater as extending downward. A plurality of ribs 553 extending in the front-rear direction is connected to the front end of the rib 551 at even intervals in the up-down direction. A plurality of ribs 554 extending in the front-rear direction are connected to the rear end of the rib 552 at even intervals in the up-down direction. Both the intervals between the plurality of ribs 553 in the up-down direction and the intervals between the plurality of ribs 554 in the up-down direction are smaller than the smallest value of the interval between the ribs 551 and 552 in the front-rear direction.

[0043]The heat exchanger 4 includes grip parts 541 and 542 on the box body 53 of the heat exchanger case 46. The grip part 541 has an inverted U-shape whose lower end is open in a right-side view, and is disposed on the center portion of the first outer wall 54 in the front-rear direction. Similarly, the grip part 542 is disposed on the left wall of the box body 53. The grip parts 541 and 542 are configured to be gripped by the user of the air conditioner 1 when mounting and removing the heat exchanger 4 in and from the drawer body 7. An inlet 57 of the first heat exchange channels R1 that has a rectangular shape in a front view is formed on the front surface of the box body 53. As illustrated in FIG. 11, an outlet 58 of the first heat exchange channels R1 that has a rectangular shape in a rear view is formed on the rear surface of the box body 53. An inlet 56 of the second heat exchange channels R2 that has a rectangular shape in a bottom view is formed on the bottom surface of the box body 53. As illustrated in FIG. 7, the first direction K1 directed from the inlet 57 to the outlet 58 of the first heat exchange channels R1 is a rearward direction, and a second direction K2 directed from the inlet 56 to the outlet 50 of the second heat exchange channels R2 is an upward direction. Both a left wall-lower end 591 and a right wall-lower end 592 of the box body 53 contact the first drain pan 81 described later.

[0044]As illustrated in FIG. 5, the length of the heat exchanger 4 in the width direction W, which is orthogonal to both the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2 and the up-down direction, is shorter as extending toward the upstream side in the drawn-out direction D than the downstream side. Specifically, a length L2 in the width direction W of the rear end portion of the heat exchanger 4 is shorter than a length L1 in the width direction W of the front end portion of the heat exchanger 4. In other words, the heat exchanger 4 has a trapezoidal shape in a plan view. The heat exchanger 4 has a truncated square pyramid shape with the front surface of the front wall of the heat exchanger case 46 serving as the bottom surface. The length of the heat exchanger 4 in the up-down direction is shorter as extending toward the upstream side in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2 than the downstream side. Specifically, as illustrated in FIG. 4, a length H2 in the up-down direction of the rear end portion of the heat exchanger 4 is shorter than a length H1 in the up-down direction of the front end portion of the heat exchanger 4. In the up-down direction, the position in the up-down direction of the rear end portion of the heat exchanger 4 is further downward relative to the position in the up-down direction of the front end portion of the heat exchanger 4.

[0045]As illustrated in FIGS. 2 and 3, the vaporization filter 6 is mounted in the drawer body 7, and is positioned further upstream in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2 relative to the heat exchanger 4, i.e., further rearward relative to the heat exchanger 4. The vaporization filter 6 allows water to be supplied from the water storage container 20 and allows first air that has flowed through the first heat exchange channels R1 to flow through the vaporization filter 6. The vaporization filter 6 is configured to cool the first air with latent heat of water.

[0046]As illustrated in FIG. 8, the vaporization filter 6 includes a case 61, and a filter 68. The case 61 has a rectangular parallelepiped shape elongated in the up-down direction. The case 61 of the vaporization filter 6 includes an upper wall 613, the second outer wall 65, a left wall 611, a lower wall 612, a front wall 617, a rear wall 618, and grip parts 641 and 642. Four openings 62 are formed on the upper wall 613 of the case 61. Each of the four openings 62 has a rectangular shape elongated in the left-right direction in a plan view. The four openings 62 are arranged at predetermined intervals in the left-right direction. Flanges 614 through 616 are disposed on the upper wall 613. The flange 614 protrudes diagonally leftward and upward from the left end portion of the upper wall 613. The flange 615 protrudes diagonally rightward and upward from the right end portion of the upper wall 613. In the left-right direction, the left end of the flange 614 is positioned further leftward relative to the left wall 611, and the right end of the flange 615 is positioned further rightward relative to the second outer wall 65. The flange 616 protrudes diagonally frontward and upward at a position frontward of the four openings 62. As illustrated in FIG. 12, a recessed part 619 recessed downward is formed on the lower wall 612. A drain hole is formed on the lower end of the recessed part 619. Water in the case 61 is to be discharged through the drain hole to a second receiving portion 84 of the first drain pan 81 described later.

[0047]In the present embodiment, the second outer wall 65 is the right wall of the case 61. The second outer wall 65 has a second groove 66 in which second ribs 853 and 854 on the opposing wall 803 described later are fitted. The second groove 66 is constituted by ribs 661 and 662. The ribs 661 and 662 are protruding portions protruding rightward and extending upward from the lower end of the right-front portion of the second outer wall 65. The portion of the rib 661 that is further upward relative to the center in the up-down direction of the rib 661 extends in the up-down direction, while the lower portion of the rib 661 extends to be inclined frontward as extending downward. The rib 662 is arranged rearward of the rib 661 and extends linearly in the up-down direction. That is, the interval in the front-rear direction between the ribs 661 and 662 becomes greater as extending downward. Both the smallest and largest values of the interval in the front-rear direction between the ribs 661 and 662 are smaller than the smallest value of the interval in the front-right direction between the ribs 551 and 552. The vaporization filter 6 in the present embodiment also has the second groove 66 on the left wall 611 that is opposite the second outer wall 65.

[0048]An inlet 63 having a rectangular shape in a front view is formed on the front wall 617 of the case 61. In the front-rear direction, the front wall 617 is positioned further rearward relative to the front ends of the upper wall 613, the second outer wall 65, the left wall 611, and the lower wall 612. In a state where the vaporization filter 6 is mounted in the drawer body 7, the front ends of the upper wall 613, the second outer wall 65, the left wall 611, and the lower wall 612 contact the rear surface of the heat exchanger 4. The upper wall 613, the second outer wall 65, the left wall 611, the lower wall 612, the rear surface of the heat exchanger 4, and the front wall 617 of the vaporization filter 6 constitute a part of the first channel P1 on the downstream side relative to the first heat exchange channels R1. This configuration inhibits mixture of the first air with other air. An outlet 64 having a rectangular shape in a rear view is formed on the rear wall 618 of the case 61. A direction from the inlet 63 to the outlet 64 of the vaporization filter 6 is the rearward direction, i.e., is identical to the first direction K1 from the inlet 57 to the outlet 58 of the first heat exchange channels R1. The grip part 641 has an inverted U-shape whose lower end is open in a right-side view, and is arranged on the center portion of the second outer wall 65 in the front-rear direction. Similarly, the grip part 642 is arranged on the left wall 611. The grip parts 641 and 642 are configured to be gripped by the user of the air conditioner 1 when mounting and removing the vaporization filter 6 in and from the drawer body 7.

[0049]As illustrated in FIGS. 4 and 5, the vaporization filter 6 includes a water receiving rib 67 on the lower end in the up-down direction of the vaporization filter 6. The water receiving rib 67 protrudes toward the upstream side relative to the first drain pan 81 in the drawn-out direction D, i.e., rearward, and extends along the width direction W orthogonal to both the drawn-out direction D and the up-down direction. The water receiving rib 67 extends between the frames 71 and 72 in the width direction W. As illustrated in FIG. 6, the outlet 64 is arranged on the rear wall 618 of the case 61 at a position upward of the water receiving rib 67. As illustrated in FIG. 12, in a state where the drawer body 7 is in the accommodated position Q1, the water receiving rib 67 is inserted in a recessed portion 38 arranged downward of the channel forming portion 37 described later and recessed rearward, and receives water discharged from the channel forming portion 37.

[0050]As illustrated in FIG. 5, the length of the vaporization filter 6 in the width direction W, which is orthogonal to both the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2 and the up-down direction, is shorter as extending toward the upstream side in the drawn-out direction D than the downstream side. Specifically, a length L4 in the width direction W of the rear end portion of the vaporization filter 6 is shorter than a length L3 in the width direction W of the front end portion of the vaporization filter 6. In other words, the vaporization filter 6 has a trapezoidal shape in a plan view. The vaporization filter 6 has a truncated square pyramid shape with the front surface of the front wall 617 of the vaporization filter 6 serving as the bottom surface. The length of the vaporization filter 6 in the up-down direction is shorter as extending toward the upstream side in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2 than the downstream side. Specifically, a length H4 in the up-down direction of the rear end portion of the vaporization filter 6 is shorter than a length H3 in the up-down direction of the front end portion of the vaporization filter 6. In the up-down direction, the position in the up-down direction of the rear end portion of the vaporization filter 6 is further downward relative to the position in the up-down direction of the front end portion of the vaporization filter 6.

[0051]Next, an operation when performing maintenance on at least one of the air filter 60, the heat exchanger 4, or the vaporization filter 6 will be described. The user of the air conditioner 1 operates the drawer handle 70 and moves the engagement parts 79 and 80 from the engagement position to the disengagement position, and moves the drawer body 7 from the accommodated position Q1 to the drawn-out position Q2. As illustrated in FIGS. 2 and 11, the air filter 60, the heat exchanger 4, and the vaporization filter 6 are positioned outside the housing 2 in a state where the drawer body 7 is in the drawn-out position Q2. As illustrated in FIG. 3, the user of the air conditioner 1 can remove each of the air filter 60, the heat exchanger 4, and the vaporization filter 6 from the drawer body 7 in a state where the drawer body 7 is in the drawn-out position Q2. As illustrated in FIG. 4, the flange part 49 of the heat exchanger 4 contacts the upper surface 69 of the vaporization filter 6 from above. Accordingly, the user removes the vaporization filter 6 from the drawer body 7 after removing the heat exchanger 4 from the drawer body 7 in order to remove the vaporization filter 6 from the drawer body 7.

[0052]When mounting the air filter 60 on the drawer body 7, the user places the air filter 60 at a position between the decorative board 73 and the support plates 734 in the front-rear direction. When mounting each of the heat exchanger 4 and the vaporization filter 6 in the drawer body 7, the user first mounts the vaporization filter 6 in the drawer body 7. The opposing wall 803 includes the second ribs 853 and 854. The second outer wall 65 has the second groove 66. The user mounts the vaporization filter 6 in the drawer body 7 by positioning the second ribs 853 and 854 of the opposing wall 803 in the interval between the ribs 661 and 662 of the vaporization filter 6 in the front-rear direction. In the front-rear direction, the second ribs 853 and 854 of the opposing wall 803 are positioned between the ribs 661 and 662. The upper portion of the front end of the second rib 853 contacts the upper portion of the rear end of the rib 661. The rear end of the second rib 854 contacts the front end of the rib 662. Similarly, the second ribs 853 and 854 disposed on a left wall 804 are positioned in the second groove 66 formed on the left wall 611 of the vaporization filter 6. The user mounts the heat exchanger 4 in the drawer body 7 after mounting the vaporization filter 6. The opposing wall 803 includes the first ribs 851 and 852. The first outer wall 54 has the first groove 55. In the front-rear direction, the first ribs 851 and 852 on the opposing wall 803 are positioned between the ribs 551 and 552. The user mounts the heat exchanger 4 in the drawer body 7 by placing the first ribs 851 and 852 of the opposing wall 803 in the interval between the ribs 551 and 552 in the front-rear direction. The front end of the first rib 851 contacts the rear end of the rib 551. The upper portion of the rear end of the first rib 852 contacts the upper portion of the front end of the rib 552. After completing maintenance, the user moves the drawer body 7 in which each of the air filter 60, the heat exchanger 4, and the vaporization filter 6 is mounted from the drawn-out position Q2 to the accommodated position Q1. During the movement of the drawer body 7 from the drawn-out position Q2 to the accommodated position Q1, the engagement parts 79 and 80, after moving from the engagement position to the disengagement position, move back to the engagement position to engage with the respective engaging parts 93 and 94.

[0053]As illustrated in FIG. 13, the water storage container 20 is configured to store water. The water storage container 20 in the present embodiment includes the first tank 201 and the second tank 202. The first tank 201 is configured to store water. The first tank 201 in the present embodiment includes first tanks 211 and 221 having configurations the same as each other. In the following description, the configuration of the first tank 211 will be described, while the description with respect to the configuration of the first tank 221 will be omitted. The first tank 211 has a rectangular parallelepiped shape elongated in the front-rear direction, and includes a first tank handle 214, a water supply port 213, and a check valve 215. The first tank handle 214 is an H-shaped portion in a front view and arranged on the front end portion of the first tank 211. The water supply port 213 is an opening formed on a bottom surface 212 of the first tank 211 and allowing water to be supplied from the inside of the first tank 211 to the second tank 202 to flow through the water supply port 213. The water supply port 213 extends downward from the bottom surface 212 to have a tubular shape. The check valve 215 is positioned inside the water supply port 213. In a state where the check valve 215 of the first tank 211 is pressed upward by a protruding part 207 of the second tank 202 described later, the check valve 215 opens a channel through which water in the first tank 211 flows to the outside of the first tank 211 through the water supply port 213. In a state where the check valve 215 of the first tank 211 is separated from the second tank 202 and is not pressed upward, the check valve 215 closes the channel through which water in the first tank 211 flows to the outside of the first tank 211 through the water supply port 213. In a state where the check valve 215 of the first tank 221 is pressed upward by a protruding part 208 of the second tank 202 described later, the check valve 215 opens a channel through which water in the first tank 221 flows to the outside of the first tank 221 through the water supply port 213. After the first tank 211 is filled with tap water while being removed from the housing 2, for example, the first tank 211 is accommodated in the housing 2. The bottom surface 212 of the first tank 211 is positioned further upward relative to a bottom wall 210 of the second tank 202 described later. When the level of water in the second tank 202 becomes lower than or equal to a predetermined value, the water inside the first tank 211 is supplied to the second tank 202 via the water supply port 213.

[0054]As illustrated in FIGS. 13 through 15, the second tank 202 is a box body having a rectangular shape whose upper portion has an opening. The second tank 202 is arranged downward of both the vaporization filter 6 and the drain pan 8. The second tank 202 is configured to store water to be supplied to the vaporization filter 6 and the heat exchanger 4. The second tank 202 in the present embodiment is removably mounted in the housing 2, and is configured to store water supplied from the first tank 201. The second tank 202 includes a second tank handle 204, an inline filter 205, a water level sensor 206, and the protruding parts 207 and 208 in a region R surrounded by an inner side surface 209 of the second tank 202. The second tank handle 204 is arranged on the center portion of the second tank 202 in the longitudinal direction, i.e., in the left-right direction. The second tank handle 204 is elongated in the left-right direction and has an inverted U-shape whose lower end is open in a front view. The center of the second tank handle 204 in the longitudinal direction is coincident with the center of the second tank 202 in the longitudinal direction. The second tank handle 204 in the present embodiment is arranged on the center portion of the second tank 202 in the short direction, i.e., in the front-rear direction, and more specifically, on a position slightly rearward relative to the center of the second tank 202 in the front-rear direction.

[0055]The inline filter 205 is configured to collect dust included in the water in the second tank 202 and to restrict the dust from flowing through a water supply channel P3 described later, which is positioned on the downstream side relative to the second tank 202. The inline filter 205 is removably mounted in the second tank 202. The inline filter 205 is positioned closer to the first side wall 21 than to the second side wall 22 opposite the first side wall 21. The water level sensor 206 is positioned rightward and rearward of the second tank handle 204. The water level sensor 206 is configured to detect the water level of the water stored in the second tank 202 and to output a detection signal to a controller 300 of the air conditioner 1. The controller 300 is configured to control the drive of a pump 9 based on the detection signal from the water level sensor 206. The controller 300 is constituted by a microcomputer, for example, and is arranged in a position opposing a front-left portion of the third side wall 23. The protruding parts 207 and 208 are protruding parts having columnar shapes and protruding upward from the bottom wall 210 of the second tank 202. The protruding part 207 is arranged leftward of the second tank handle 204, and the protruding part 208 is arranged rightward of the second tank handle 204. In other words, the second tank handle 204 is positioned between the protruding parts 207 and 208 in the longitudinal direction of the second tank 202.

[0056]As illustrated in FIG. 15, a second tank check valve 18 is arranged on the second tank 202. The second tank check valve 18 is positioned on the downstream side relative to the inline filter 205 in the water supply channel P3. The second tank check valve 18 is connected to a discharge port forming portion 199 protruding downward from a lower surface of the bottom wall 210 of the second tank 202. In a state where the second tank check valve 18 is pressed upward by a connecting portion 399 of the second tank accommodating portion 39 described later, the second tank check valve 18 opens a channel through which water in the second tank 202 flows to the outside of the second tank 202. In a state where the second tank check valve 18 is in separation from the connecting portion 399 and is not pressed upward, the second tank check valve 18 closes the channel through which water in the second tank 202 flows to the outside of the second tank 202. The second tank check valve 18 is an example of the “check valve”.

[0057]The first tank accommodating portion 140 is arranged in the housing 2 and accommodates the first tank 201. In the up-down direction, the first tank accommodating portion 140 is positioned downward of the rails 91 and 92 and upward of the lower wall 26 of the housing 2. More specifically, the first tank accommodating portion 140 includes a plate portion 155, and partition walls 141 through 144. The plate portion 155 extends horizontally at a position rearward of a cover 10 of the second tank accommodating portion 39 described later. The partition walls 141 through 144 have plate shapes and protrude upward from the plate portion 155. The partition walls 141 through 144 separate the space in which the first tank 211 is accommodated and the space in which the first tank 221 is accommodated from each other. In the left-right direction, the first tank 211 is positioned between the partition walls 141 and 142, and the first tank 221 is positioned between the partition walls 143 and 144. The front end portions of the first tanks 211 and 221 are arranged upward of the cover 10.

[0058]As illustrated in FIG. 14, the second tank accommodating portion 39 is arranged inside the housing 2 and accommodates the second tank 202. The second tank accommodating portion 39 is arranged closer to the first side wall 21 than to the second side wall 22 opposite the first side wall 21. That is, the second tank accommodating portion 39 is arranged further frontward relative to the center of the housing 2 in the front-rear direction. The second tank accommodating portion 39 includes the cover 10, a hinge 15, a recessed portion 341, and a sealing member 16. As illustrated in FIG. 11, the hinge 15 fixes the cover 10 in the housing 2 so that the cover 10 is pivotally movable between a closed position Q3 in which the cover 10 covers the upper portion of the second tank 202 accommodated in the second tank accommodating portion 39, and an open position Q4 in which the cover 10 opens the upper portion of the second tank 202 accommodated in the second tank accommodating portion 39. In a state where the cover 10 is in the closed position Q3, the cover 10 extends horizontally at a position frontward relative to the hinge 15. In a state where the cover 10 is in the open position Q4, the cover 10 extends upward relative to the hinge 15. The second tank accommodating portion 39 is an example of the “accommodating portion”.

[0059]The cover 10 includes a cover body 110, and a hollow tube body 111. The cover body 110 includes a cover body protrusion 112 protruding from an upper surface 115. The cover body protrusion 112 protrudes upward from the upper surface 115 at a position between the tube body 111 and the retrieving port 27 in a state where the cover 10 is in the closed position Q3. The cover body protrusion 112 is positioned between the tube body 111 and the retrieving port 27 in the front-rear direction in a state where the cover 10 is in the closed position Q3. Insertion holes 113 and 114 through which the water supply ports 213 of the first tank 201 are respectively inserted are formed on the cover body 110. The outer peripheries of the insertion holes 113 and 114 are tapered upward as extending away from the outer peripheries. The insertion hole 113 is arranged leftward of the cover body protrusion 112, and the insertion hole 114 is arranged rightward of the cover body protrusion 112. In other words, the cover body protrusion 112 is arranged between the insertion holes 113 and 114 in the left-right direction. The water supply port 213 of the first tank 211 is inserted through the insertion hole 113, and the water supply port 213 of the first tank 221 is inserted through the insertion hole 114. In a plan view, the front end portion of the cover body protrusion 112 is sloped so as to be positioned closer to the center WM in the width direction W as extending frontward in a state where the cover 10 is in the closed position Q3. The cover body protrusion 112 and the tube body 111 are positioned on the center WM in the width direction W. The cover body protrusion 112 is positioned frontward of the tube body 111 in a state where the cover 10 is in the closed position Q3.

[0060]As illustrated in FIG. 11, the tube body 111 has a tube body inlet 118 connected to an inlet piping 17, and a tube body outlet 119 connected to the cover body 110. In a state where the cover 10 is in the open position Q4, the tube body outlet 119 of the tube body 111 is positioned further upward relative to the tube body inlet 118. In a state where the cover 10 is in the closed position Q3, the tube body outlet 119 is positioned further downward relative to the tube body inlet 118. In a state where the cover 10 is in the closed position Q3, the upper end of the cover body protrusion 112 is positioned further upward relative to the upper end of the tube body 111. A pair of left and right pawls 131 is disposed on the cover body 110. The pair of left and right pawls 131 is positioned on the front end of the cover body 110 in a state where the cover 10 is in the closed position Q3. In a state where the cover 10 is in the closed position Q3, the pawls 131 are respectively in engagement with recessed parts 135 disposed on the front end of the second tank accommodating portion 39 described later.

[0061]As illustrated in FIG. 14, the recessed portion 341 has a hexagonal shape elongated in the left-right direction in a plan view. The connecting portion 399, a recessed portion 398 recessed downward in the rear end portion of the recessed portion 341, and external communication holes 391 through 397 in communication with the outer space of the housing 2 are formed on a bottom wall 390 of the recessed portion 341. The connecting portion 399 is disposed on the center portion of the recessed portion 341 in the left-right direction. In a state where the second tank 202 is accommodated in the second tank accommodating portion 39, the connecting portion 399 contacts the second tank check valve 18. The recessed portion 398 is a recessed portion recessed downward in the rear end portion of the recessed portion 341, and corresponds to the water level sensor 206 of the second tank 202. The external communication holes 391 through 397 are holes for discharging water that has flowed into the second tank accommodating portion 39 out of the housing 2. As illustrated in FIG. 17, the lower wall 26 has a recessed portion 270 recessed downward, and holes 271 through 274 are formed on the respective four corners of the recessed portion 270. The external communication holes 391 through 397 are in communication with the outer space of the housing 2 via the holes 271 through 274 formed on the lower wall 26 of the housing 2. The external communication hole 391 is formed on the left-rear portion of the bottom wall 390, the external communication hole 392 is formed on the rear portion of the center of the bottom wall 390 in the left-right direction, and the external communication hole 393 is formed on the right-rear portion of the bottom wall 390. The external communication hole 394 is formed on the left-front portion of the bottom wall 390, and the external communication hole 395 is formed on the right-front portion of the bottom wall 390. The external communication hole 396 is formed on the left-rear portion of the recessed portion 398, and the external communication hole 397 is formed on the right-front portion of the recessed portion 398. The sealing member 16 is a member having a hexagonal shape in a plan view and arranged on the outer peripheral portion of an opening 400 of the recessed portion 341. The sealing member 16 is positioned between the cover 10 and the second tank 202 in a state where the cover 10 is in the closed position Q3. The sealing member 16 is made of an elastic material such as rubber.

[0062]As illustrated in FIG. 11, the outlet piping 19 is arranged inside the housing 2, and is connected to the second tank 202 through the second tank check valve 18. One end of the outlet piping 19 is connected to the connecting portion 399 of the second tank accommodating portion 39 at a position upward of the lower wall 26 of the housing 2. The other end of the outlet piping 19 is connected to the pump 9.

[0063]Next, operations for mounting and removing the second tank 202 in and from the housing 2 will be described with reference to FIGS. 11 through 16. In order to remove the second tank 202 from the housing 2, the user first removes the first tanks 211 and 221 from the housing 2. The user moves the cover 10 from the closed position Q3 to the open position Q4. At this time, the inlet piping 17 connected to the tube body 111 flexes to thereby position the tube body inlet 118 downward relative to the tube body outlet 119. The user grips the second tank handle 204 and removes the second tank 202 from the recessed portion 341 of the second tank accommodating portion 39. The second tank check valve 18 arranged on the second tank 202 separates from the connecting portion 399 of the second tank accommodating portion 39 and closes the channel through which water in the second tank 202 flows toward the outside of the second tank 202. While the second tank 202 is removed from the housing 2, the user can perform maintenance on the second tank 202 and the second tank accommodating portion 39. When mounting the second tank 202 in the housing 2, the user grips the second tank handle 204 and positions the second tank 202 in the recessed portion 341 of the second tank accommodating portion 39. The second tank check valve 18 is pressed upward by the connecting portion 399 of the second tank accommodating portion 39, and opens the channel through which water in the second tank 202 flows toward the outside of the second tank 202. The user moves the cover 10 from the open position Q4 to the closed position Q3. The user positions the first tanks 211 and 221 in the first tank accommodating portion 140. The tube body 111 includes the cover body protrusion 112 on the upper surface 115 of the cover 10. The cover body protrusion 112 guides the movement of the first tank 211 so that the first tank 211 is positioned between the partition walls 141 and 142 of the first tank accommodating portion 140. The cover body protrusion 112 guides the movement of the first tank 221 so that the first tank 221 is positioned between the partition walls 143 and 144 of the first tank accommodating portion 140. The cover body protrusion 112 is positioned frontward of the tube body 111 in a state where the cover 10 is in the closed position Q3. The range in which the tube body 111 extends in the width direction W is included within the range in which the cover body protrusion 112 extends in the width direction W. Therefore, the cover body protrusion 112 inhibits accidental contact of the first tanks 211 and 221 with the tube body 111 during a process of mounting the first tanks 211 and 221. The cover body protrusion 112 separates the first tank 211 and the first tank 221 from each other in the left-right direction at a position further frontward relative to the partition walls 141 through 144. By performing the above operations, each of the second tank 202 and the first tank 201 is mounted in the housing 2.

[0064]As illustrated in FIG. 3, the drain pan 8 is configured to receive water discharged from the cooling unit 3. More specifically, the drain pan 8 is arranged directly below the heat exchanger 4, is configured to receive water discharged from the second heat exchange channels R2, and constitutes a part of the second channel P2 on the upstream side relative to the second heat exchange channels R2. The drain pan 8 in the present embodiment includes the first drain pan 81 and a second drain pan 82. As illustrated in FIGS. 9 and 10, the first drain pan 81 has a rectangular tray shape and is arranged downward of the heat exchanger 4 and upward of the second tank 202. The first drain pan 81 is disposed in the drawer body 7 and is configured to receive water discharged from the second heat exchange channels R2. The first drain pan 81 is fixed to the frames 71 and 72. More specifically, as illustrated in FIG. 9, a lower surface 833 of a support portion 808 is in contact with the frame 71 and is fixed to the frame 71 together with the rear end portion 762 of the beam member 76 positioned between the first drain pan 81 and the frame 71. As illustrated in FIGS. 4 and 6, a lower surface 834 of a support portion 809 is in contact with the frame 72 and is fixed to the frame 72, using fixing members 773, together with the rear end portion 772 of the beam member 77 positioned between the first drain pan 81 and the frame 72. As illustrated in FIG. 12, the front end portion of the first drain pan 81 contacts the rear-upper portion of the drawer handle 70.

[0065]The first drain pan 81 includes a front wall 801, a rear wall 802, the opposing wall 803, the left wall 804, a first receiving portion 83, the second receiving portion 84, support portions 808 through 810, a drain wall 85, and a water discharge port 87. The first drain pan 81 is connected to a drain piping 90. The front wall 801 opposes the rear surface of the decorative board 73. A notch 806 notched downward from the upper end of the front wall 801 is formed on the front wall 801. The lower end of the notch 806 is positioned further downward relative to the lower end of the intake port 74. A notch 807 notched downward from the upper end of the rear wall 802 is formed on the rear wall 802. The opposing wall 803 serves as an example of the first opposing wall and the second opposing wall in the present disclosure. The opposing wall 803 is the right wall of the first drain pan 81 that connects the right end of the front wall 801 and the right end of the rear wall 802 to each other in the front-rear direction. The left wall 804 connects the left end of the front wall 801 and the left end of the rear wall 802 to each other in the front-rear direction.

[0066]The first receiving portion 83 is configured to receive water discharged from the second heat exchange channels R2. A bottom wall 831 of the first receiving portion 83 is sloped downward as extending rearward. A front wall 832 of the first receiving portion 83 is sloped downward as extending rearward. The front end of the front wall 832 is connected to the front wall 801 at a position downward of the notch 806, and the rear end of the front wall 832 is connected to the front end of the bottom wall 831. The second receiving portion 84 is arranged rearward of the first receiving portion 83, and is configured to receive water discharged from the vaporization filter 6. A bottom wall 841 of the second receiving portion 84 is sloped downward as extending toward the center WM in the width direction W. In other words, the bottom wall 841 of the second receiving portion 84 is sloped to have a V-shape in a rear view. The bottom wall 841 has a groove portion 820 recessed downward and extending in the front-rear direction on the center portion of the bottom wall 841 in the width direction W. In the up-down direction, a lowermost end 835 of the bottom wall 831 of the first receiving portion 83 is positioned further downward relative to a lowermost end 842 of the bottom wall 841 of the second receiving portion 84, and is positioned further upward relative to a lowermost end 843 of the groove portion 820 of the second receiving portion 84.

[0067]The drain wall 85 separates the first receiving portion 83 and the second receiving portion 84 from each other. A communication hole 86 providing communication between the first receiving portion 83 and the second receiving portion 84 in the front-rear direction is formed on the lower end portion of the drain wall 85. The front-lower end of the communication hole 86 is connected to the lower end of the upper surface of the bottom wall 831 of the first receiving portion 83. The length of the communication hole 86 in the width direction W is shorter than the length of the groove portion 820 in the width direction W. The length of the communication hole 86 in the up-down direction in the rear surface of the drain wall 85 is longer than the length of the communication hole 86 in the up-down direction on the front surface of the drain wall 85.

[0068]The support portions 808 and 809 function as the first support portion in the present disclosure, and the support portions 808 through 810 function as the second support portion in the present disclosure. As illustrated in FIG. 10, the support portion 808 is a portion elongated in the front-rear direction and arranged between the left wall 804 and the first and second receiving portions 83 and 84 in the width direction W. The support portion 809 is a portion elongated in the front-rear direction and arranged between the opposing wall 803 and the first and second receiving portions 83 and 84 in the width direction W. The support portion 810 is a portion elongated in the left-right direction to connect the rear end of the support portion 808 and the rear end of the support portion 809 to each other. The support portions 808 and 809 support the heat exchanger 4 from below. More specifically, the support portion 808 is in contact with the left wall-lower end 591 of the heat exchanger 4. The support portion 809 is in contact with the right wall-lower end 592 of the heat exchanger 4. Accordingly, the support portions 808 and 809 support the heat exchanger 4 from below, and the air conditioner 1 inhibits entry of air through a gap between the first receiving portion 83 and the heat exchanger 4 in the width direction W. The support portions 808 through 810 support the vaporization filter 6 from below in cooperation with the drain wall 85. More specifically, the support portion 808 is in contact with the lower end of the left wall 611 of the vaporization filter 6. The support portion 809 is in contact with the lower end of the second outer wall 65 of the vaporization filter 6. The support portion 810 contacts the lower end of the rear wall 618 of the vaporization filter 6. The drain wall 85 is in contact with the front wall 617 of the vaporization filter 6. That is, the portion of the vaporization filter 6 in contact with the second receiving portion 84 has an annular shape in a plan view. As a result, the support portions 808 through 810 support the vaporization filter 6 from below in cooperation with the drain wall 85, and the air conditioner 1 inhibits entry of air through a gap between the second receiving portion 84 and the vaporization filter 6. While the first receiving portion 83 and the second receiving portion 84 are in communication with each other by the communication hole 86 formed on the drain wall 85, entry of air other than the second air into the second heat exchange channels R2 is restricted since the communication hole 86 is relatively small in size.

[0069]As illustrated in FIG. 10, the water discharge port 87 is positioned further upstream relative to the first receiving portion 83 in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2. The water discharge port 87 allows water received by the first receiving portion 83 to be discharged through the water discharge port 87. The water discharge port 87 is a circular-shaped hole in a front view arranged on the rear wall 802, and is in communication with the rear-lower end of the groove portion 820.

[0070]The drain piping 90 is connected to the rear end portion of the first drain pan 81, and more specifically, to the water discharge port 87 of the first drain pan 81. The drain piping 90 is L-shaped piping that extends rearward from the rear end of the first drain pan 81 and that is bent downward. Both in a state where the drawer body 7 is in the accommodated position Q1 and in a state where the drawer body 7 is in the drawn-out position Q2, water received by the first drain pan 81 flows toward the second drain pan 82. More specifically, as illustrated in FIG. 12, in a state where the drawer body 7 is in the accommodated position Q1, the drain piping 90 is positioned upward of a rear end portion 821 of the second drain pan 82. As illustrated in FIG. 11, in a state where the drawer body 7 is in the drawn-out position Q2, the drain piping 90 contacts a front end portion 822 of the second drain pan 82. Consequently, the second drain pan 82 receives water that has flowed through the drain piping 90 both in a state where the drawer body 7 is in the accommodated position Q1 and in a state where the drawer body 7 is in the drawn-out position Q2.

[0071]As illustrated in FIGS. 3, 11, and 12, the second drain pan 82 is disposed in the housing 2. The second drain pan 82 has a tray shape elongated in the front-rear direction. In the up-down direction, the second drain pan 82 is positioned downward of the rails 91 and 92 and upward of the first tank 201. In the left-right direction, the second drain pan 82 is positioned between the rails 91 and 92, and between the first tanks 211 and 221. The length of the second drain pan 82 in the width direction W is shorter than the length of the first drain pan 81 in the width direction W, and more specifically, is shorter than half the length of the first drain pan 81 in the width direction W. In the front-rear direction, the rear end portion 821 of the second drain pan 82 extends further rearward relative to the front end of the channel forming portion 37. The second drain pan 82 has a V-shape in a right-side view. In the front-rear direction, a lower end portion 823 of the second drain pan 82 is positioned further rearward relative to the center in the front-rear direction of the second drain pan 82. The lower end portion 823 of the second drain pan 82 is connected to a piping 88. As illustrated in FIG. 17, a rear end 826 of the second drain pan 82 is bent upward along the second side wall 22 and is fixed to the second side wall 22.

[0072]As illustrated in FIG. 12, the inlet piping 17 has flexibility and connects the cover 10 of the second tank accommodating portion 39 and the second drain pan 82 of the drain pan 8 to each other. The inlet piping 17 is, for example, a hose made of resin. An upper end 171 of the inlet piping 17 is connected to the piping 88 of the second drain pan 82, and a lower end 172 of the inlet piping 17 is connected to the tube body 111 of the cover 10. The length of the inlet piping 17 is set with consideration to the range in which an operation of opening and closing the cover 10 can be performed. Water stored in the second tank 202 includes water collected by the second tank 202 via the drain pan 8 and the inlet piping 17.

[0073]As illustrated in FIGS. 3, 11, and 12, the channel forming portion 37 is arranged inside the housing 2, and constitutes a part of the first channel P1 through which the first air that has flowed through the vaporization filter 6 flows. In the up-down direction, the channel forming portion 37 is positioned upward of the rails 91 and 92. The channel forming portion 37 is positioned rearward of the vaporization filter 6 and has a tubular shape extending in the up-down direction along the second side wall 22 of the housing 2. An inlet 371 having a rectangular shape in a plan view is formed on a front surface 370 of the channel forming portion 37. The lower end portion of a rear wall 373 of the channel forming portion 37 is sloped downward as extending frontward. The recessed portion 38 elongated in the left-right direction and recessed rearward is formed in the lower portion of the channel forming portion 37. In a state where the drawer body 7 is in the accommodated position Q1, the front surface 370 of the channel forming portion 37 contacts the rear wall 618 of the vaporization filter 6, and a lower-front end 381 of the recessed portion 38 contacts the rear wall 618 of the vaporization filter 6 at a position downward of the water receiving rib 67. Since the rear wall 618 contacts both the lower-front end 381 of the recessed portion 38 and the front surface 370 of the channel forming portion 37 in a state where the drawer body 7 is in the accommodated position Q1, the first channel P1 ensures airtightness between the vaporization filter 6 and the channel forming portion 37 in a state where the drawer body 7 is in the accommodated position Q1.

[0074]As illustrated in FIGS. 11 and 17, the water supply unit 13 is configured to supply water stored in the second tank 202 to both the heat exchanger 4 and the vaporization filter 6. The water supply unit 13 includes the pump 9, the controller 300, the outlet piping 19, a fourth piping 95, a third piping 98, a first piping 96, and a second piping 97. The outlet piping 19, the pump 9, the fourth piping 95, the third piping 98, the first piping 96, and the second piping 97 are included in the water supply channel P3 from the second tank 202 to the cooling unit 3, and are connected in this order from the upstream side to the downstream side in the direction in which water flows in the water supply channel P3. As illustrated in FIG. 14, the pump 9 is configured to deliver water to both the first piping 96 and the second piping 97. The pump 9 is positioned between the second side wall 22 and the second tank 202, and more specifically, in a position adjacent to the second side wall 22. The controller 300 is connected to the pump 9 through a communication line. The pump 9 is configured to be driven and to be halted based on the control signal from the controller 300 outputted in accordance with the detection signal from the water level sensor 206.

[0075]As illustrated in FIG. 11, the outlet piping 19 extends in the front-rear direction at a position downward of the plate portion 155 of the first tank accommodating portion 140 to connect the second tank 202 and the pump 9 to each other. As illustrated in FIGS. 11 and 17, the fourth piping 95 is connected to the pump 9 and extends upward from the pump 9. The fourth piping 95 is inserted through a hole 825 that is formed in the rear end portion 821 of the second drain pan 82 and that extends through the rear end portion 821 vertically. The fourth piping 95 is bent rightward near the upper end of the second drain pan 82 and extends to a portion in the vicinity of the third side wall 23. The right end of the fourth piping 95 is connected to the lower end of the third piping 98 in the vicinity of the third side wall 23. As illustrated in FIG. 18, the third piping 98 is arranged along the third side wall 23 and is connected to the first piping 96. The third piping 98 includes a first portion 981 extending upward from the right end of the fourth piping 95 along the third side wall 23 and more specifically along the prop 283, a second portion 982 extending frontward from the upper end of the first portion 981 along the third side wall 23, a third portion 983 extending leftward from the front end of the second portion 982, and a fourth portion 984 extending rearward from the left end of the third portion 983. The third piping 98 has a J-shape in a plan view. The rear end of the fourth portion 984 is connected to the first piping 96.

[0076]As illustrated in FIGS. 11 and 18, the first piping 96 is positioned directly above the heat exchanger 4 and allows water to be supplied to the second heat exchange channels R2 to flow through the first piping 96. The first piping 96 is positioned between a first fan case 107 and a second fan case 108, which will be described later, in the front-rear direction. In the second channel P2, the first piping 96 is positioned on the upstream side relative to the fan motor 103 described later and on the downstream side relative to the heat exchanger 4. The first piping 96 includes water supply pipes 961 through 963 which are elongated in the left-right direction. The water supply pipes 961 through 963 are arranged at predetermined intervals X3 in the front-rear direction. The water supply pipes 961 through 963 have shapes the same as one another. The water supply pipe 961 includes a support plate portion 964 on the right end portion of the water supply pipe 961. The support plate portion 964 is fixed to a support plate 951 fixed to the lower surface of the first fan case 107. The support plate 951 extends along the third side wall 23 in the front-rear direction. Similarly, the water supply pipe 962 includes a support plate portion 965 on the right end portion of the water supply pipe 962. The support plate portion 965 is fixed to the support plate 951. The water supply pipe 963 includes a support plate portion 966 on the right end portion of the water supply pipe 963, and the support plate portion 966 is fixed to the support plate 951. A plurality of nozzles 921 arranged at intervals X1 in the left-right direction are formed on the lower surface of each of the water supply pipes 961 through 963. Each of the plurality of nozzles 921 in the first piping 96 opposes the outlet 50 of the second heat exchange channels R2. The water supply pipes 961 and 962 are connected to each other by a connecting pipe 985 extending in the front-rear direction. The water supply pipes 962 and 963 are connected to each other by a connecting pipe 986 extending in the front-rear direction.

[0077]The second piping 97 is positioned rearward of the first piping 96 and positioned directly above the vaporization filter 6. The second piping 97 allows water to be supplied to the vaporization filter 6 to flow through the second piping 97. The second piping 97 extends in the left-right direction. An interval X4 between the second piping 97 and the first piping 96 in the front-rear direction is greater than each interval X3. The water supply pipe 963 and the second piping 97 are connected to each other by a connecting pipe 987 extending in the front-rear direction. The connecting pipe 987 is gently bent to have a Z-shape in a right-side view. In a plan view, the connecting pipes 985 through 987 are arranged on the same line as the fourth portion 984 of the third piping 98. The second piping 97 includes a support plate portion 967 on the right end portion of the second piping 97, and the support plate portion 967 is fixed to the support plate 951. A plurality of nozzles 922 arranged at intervals X2 in the left-right direction are formed on the lower surface of the second piping 97. Each of the plurality of nozzles 922 in the second piping 97 opposes the upper surface 69 or the openings 62 of the vaporization filter 6. Each interval X2 is greater than each interval X1. Each interval X2 is 1.5 to 2.5 times greater than each interval X1. The total number of the nozzles 921 in the first piping 96 is greater than the total number of the nozzles 922 in the second piping 97. The second piping 97 is arranged further downward relative to the first piping 96 in the vertical direction. Both a first distance D1 between the first piping 96 and the heat exchanger 4 in the vertical direction and a distance D3 between the first piping 96 and the heat exchanger body 41 in the up-down direction are greater than a second distance between the second piping 97 and the vaporization filter 6 in the vertical direction. The nozzles 922 in the second piping 97 are inserted in the openings 62 on the upper surface 69 of the vaporization filter 6 and are positioned adjacent to the filter 68. Specifically, the second piping 97 is positioned further downward relative to the upper surface 69 of the vaporization filter 6 by a distance D2, and therefore the second distance between the second piping 97 and the vaporization filter 6 in the up-down direction is 0 (zero). The second piping 97 and the filter 68 of the vaporization filter 6 are separated from each other by a distance D4 in the up-down direction.

[0078]In the water supply channel P3, as illustrated in FIG. 18, water that has been pumped up using the pump 9 flows through the first portion 981 of the third piping 98 in a direction C1 along the third side wall 23, i.e., upward, and then flows through the second portion 982 of the third piping 98 in a direction C2 along the third side wall 23, i.e., frontward. At a position further frontward relative to the first piping 96 in the front-rear direction, the water flows through the third portion 983 of the third piping 98 in a direction C3 away from the third side wall 23, i.e., leftward, flows through the fourth portion 984 of the third piping 98 in a direction C4 parallel to the third side wall 23, i.e., rearward, and then flows separately through the connecting portions of the first piping 96 with the water supply pipes 961 through 963 in a direction C5 away from the third side wall 23, i.e., leftward, in a direction C6 toward the third side wall 23, i.e., rightward, and in the direction C4. After flowing through the connecting pipe 987 in a direction C7 parallel to the third side wall 23, the water flows through the connecting portion of the connecting pipe 987 with the second piping 97 separately in the direction C5 and in the direction C6.

[0079]As illustrated in FIG. 17, the pressing members 331 and 332 have plate shapes elongated in the front-rear direction. In a state where the drawer body 7 is in the accommodated position Q1, the pressing members 331 and 332 contact the upper surface 48 of the heat exchanger 4 and press the upper surface 48 of the heat exchanger 4 downward. The configurations of the pressing members 331 and 332 are symmetrical to each other in the left-right direction. In the up-down direction, the pressing members 331 and 332 are positioned upward of the heat exchanger 4 and downward of the first fan 101. The pressing member 331 is positioned leftward of both the first piping 96 and the second piping 97, and the pressing member 332 is positioned rightward of both the first piping 96 and the second piping 97. In other words, the first piping 96 and the second piping 97 are positioned between the pressing members 331 and 332 in the width direction W. In the following description, the pressing member 331 will be described, and the description of the pressing member 332 will be omitted.

[0080]As illustrated in FIGS. 12 and 17, the pressing member 331 opposes the left portion of the upper surface 48 of the heat exchanger 4, and the pressing member 332 opposes the right portion of the upper surface 48 of the heat exchanger 4. The first pressing member 331 includes a first protrusion 33 and a second protrusion 34. The first protrusion 33 protrudes downward inside the housing 2. The first protrusion 33 contacts the upper surface 48 of the heat exchanger 4 in a state where the drawer body 7 is in the accommodated position Q1. In the front-rear direction, the range in which the first protrusion 33 is positioned and the range in which the water supply pipe 961 of the first piping 96 is positioned overlap each other. The second protrusion 34 protrudes further downward relative to the lower end of the first protrusion 33 inside the housing 2 on the upstream side relative to the first protrusion 33 in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2. The second protrusion 34 contacts the upper surface 48 of the heat exchanger 4 in a state where the drawer body 7 is in the accommodated position Q1. The second protrusion 34 is arranged downward of the front end portion of the first fan case 107 described later. The second protrusion 34 contacts the rear end of the upper surface 48 of the heat exchanger 4 in the front-rear direction. In other words, the pressing member 331 contacts the left portion of the upper surface 48 of the heat exchanger 4 at two points, namely the first protrusion 33 and the second protrusion 34 which are arranged to be positioned away from each other in the front-rear direction, and presses the heat exchanger 4 downward. Similarly, the pressing member 332 contacts the right portion of the upper surface 48 of the heat exchanger 4 at two points, namely the first protrusion 33 and the second protrusion 34 that are separately positioned in the front-rear direction, and presses the heat exchanger 4 downward. Accordingly, four points on the upper surface 48 of the heat exchanger 4 are pressed downward by the pressing members 331 and 332.

[0081]As illustrated in FIG. 12, the first wall 35 has a V-shaped plate shape and protrudes downward inside the housing 2. The first wall 35 extends in the left-right direction and is fixed to the lower surface of the second fan case 108 using a fixing member. The cushion member 351 is fixed to the front surface of the first wall 35. In a state where the drawer body 7 is in the accommodated position Q1, the first wall 35 contacts the rear surface of the first contact part 51 of the heat exchanger 4 via the cushion member 351. The second wall 36 has a V-shaped plate shape and protrudes downward on the upstream side relative to the first wall 35 in the drawn-out direction D in which the drawer body 7 moves from the accommodated position Q1 to the drawn-out position Q2, i.e., at a position further rearward relative to the first wall 35. The second wall 36 extends in the left-right direction and is fixed to the lower surface of the first fan case 107 using a fixing member. The cushion member 361 is fixed to the front surface of the second wall 36. In a state where the drawer body 7 is in the accommodated position Q1, the second wall 36 contacts the rear surface of the second contact part 52 of the heat exchanger 4 via the cushion member 361.

[0082]As illustrated in FIGS. 11 and 12, the first fan 101 is configured to cause the first air to flow through the first channel P1 extending from the intake port 74 to the first outlet port 29 and including the first heat exchange channels R1. The first fan 101 is arranged in the vicinity of the first outlet port 29, and more specifically, inside the first fan case 107 in the rear-upper portion of the housing 2. The first fan 101 is arranged at a position overlapping the vaporization filter 6 in the direction in which the first air flows through the first heat exchange channels R1, i.e., in the rearward direction. The second fan 102 is arranged in the vicinity of the second outlet port 30, and more specifically, inside the second fan case 108 in the front-upper portion of the housing 2. The second fan 102 is configured to cause the second air to flow through the second channel P2 extending from the intake port 74 to the second outlet port 30 and including the second heat exchange channels R2. The second fan 102 is arranged at a position overlapping the heat exchanger 4 in the direction in which the first air flows through the first heat exchange channels R1. An output of the second fan 102 is smaller than that of the first fan 101 which causes the first air to flow through the first heat exchange channels R1. More specifically, a diameter Y2 of the second fan 102 is smaller than a diameter Y1 of the first fan 101.

[0083]The fan motor 103 is configured to drive the first fan 101 and the second fan 102. A rotational shaft 104 of the fan motor 103 extends in parallel to the direction in which the first air flows through the first heat exchange channels R1. The rear end of the rotational shaft 104 of the fan motor 103 is coupled to the first fan 101, and the front end of the rotational shaft 104 is coupled to the second fan 102. A power supply harness 99 is arranged along the fourth side wall 24, and more specifically, along the prop 284, and is configured to supply electric power to the fan motor 103. A cord 100 is inserted through a hole arranged in the lower end portion of the second side wall 22 of the housing 2 and is connected to the power supply harness 99. The electric power from the power supply harness 99 is supplied to at least the pump 9, the microcomputer, and the fan motor 103. The partition plate 105 is arranged between the first fan 101 and the second fan 102. This configuration inhibits mixture of the first air conveyed by the first fan 101 with the second air conveyed by the second fan 102. The partition plate 105 in the present embodiment is the front wall of the first fan case 107. The fan motor 103 is arranged between the partition plate 105 and the second fan 102. The fan motor 103 is arranged in the second channel P2, and is to be cooled by the second air conveyed using the second fan 102. Therefore, the air conditioner 1 can efficiently cool the fan motor 103 with the cold energy of the second air without increasing the temperature of the first air conveyed by the first fan 101.

[0084]An operation of the air conditioner 1 having the above configuration will be described with reference to FIG. 12. The air conditioner 1 drives the fan motor 103 to draw air in the space to be air-conditioned through the intake port 74. The drawn air passes through the air filter 60 and flows into the heat exchanger 4. The air that has flowed into the heat exchanger 4 is separated into the second air flowing through the second channel P2 and the first air flowing through the first channel P1.

[0085]The air conditioner 1 drives the pump 9 to supply water stored in the second tank 202 to both the second heat exchange channels R2 and the vaporization filter 6. Some of the water that has been supplied to the second heat exchange channels R2 and the vaporization filter 6 is collected by the second tank 202 via the drain pan 8. The first piping 96 drops water that has been supplied from the second tank 202 by the pump 9 onto the second heat exchange channels R2.

[0086]After flowing through the intake port 74 and flowing downward, the second air turns back upward in the first receiving portion 83 of the first drain pan 81, and flows upward through the second heat exchange channels R2. The second heat exchange channels R2 are thus in a state in which the second air and the water that has been dropped from the first piping 96 are present together. More specifically, since the second direction K2 directed from the inlet 56 toward the outlet 50 of the second heat exchange channels R2, i.e., the upward direction, and the direction in which the water supplied from the first piping 96 flows, i.e., the downward direction, are opposite from each other, the water remains longer in the second heat exchange channels R2 in comparison with a case in which the second direction K2 and the direction in which the water flows are the same as each other. The water stored in the second tank 202 includes water collected from the vaporization filter 6 after initiating operation of the air conditioner 1 and cooled by the heat of vaporization. Accordingly, the temperature of the water supplied from the second tank 202 becomes lower than the temperature of the second air immediately after flowing into the second heat exchange channels R2 depending on the operating status of the air conditioner 1. The second air is cooled by the water that has been dropped from the first piping 96 through sensible heat exchange. The second air is also cooled by heat of vaporization when the water that has been dropped from the first piping 96 to the second heat exchange channels R2 vaporizes.

[0087]The first direction K1 directed from the inlet 57 to the outlet 58 of the first heat exchange channels R1 of the heat exchanger 4 and the second direction K2 directed from the inlet 56 to the outlet 50 of the second heat exchange channels R2 are orthogonal to each other. The second air flowing through the second heat exchange channels R2 is cooled by the water supplied from the second tank 202, and the first air is cooled by the second air. In other words, in the heat exchanger 4, sensible heat is exchanged between the first air and the second air via the sheets 45 of the partition walls 42. After flowing upward through the second heat exchange channels R2, the second air passes in the vicinity of the fan motor 103 arranged in the second channel P2 and is discharged out of the air conditioner 1 through the second outlet port 30. At this time, the second air cools the fan motor 103. In a method in which the second air is not cooled using heat of vaporization unlike in the air conditioner 1, if the second outlet port 30 through which the second air is blown out were positioned on the front portion of the housing 2, i.e., on the side to which the first air is to be sent, the air supply duct 291 for the first air may be heated by the second air, thereby resulting in rise in the temperature of the first air. However, in the air conditioner 1, since the second air is also evaporatively cooled in the heat exchanger 4, the first air is less likely to be heated by the second air in comparison with a method of cooling in which evaporative cooling is not employed.

[0088]After flowing through the first heat exchange channels R1 of the heat exchanger 4 in the first direction K1, i.e., rearward, the first air passes through the vaporization filter 6 rearward. The water that has been supplied from the second tank 202 is dropped to the vaporization filter 6 via the second piping 97 arranged upward of the vaporization filter 6. Since the interior of the first channel P1 is maintained at a negative pressure, the water that has been supplied from the second tank 202 is drawn into the interior of the vaporization filter 6 through the nozzles 922 of the second piping 97, and permeates the vaporization filter 6. The second distance between each nozzle 922 and the second piping 97 in the up-down direction is 0 (zero), thereby lowering the possibility in which air flows into the vaporization filter 6 through the openings 62 arranged on the upper surface 69 of the vaporization filter 6. The first air flowing through the vaporization filter 6 prompts vaporization of the water that has been permeated the vaporization filter 6. As a result, the water that has been permeated the vaporization filter 6 vaporizes, i.e., evaporates into water vapor, and is contained in the first air. The first air is cooled with heat of vaporization at this time, and the temperature of the first air is lowered. The cooled first air flows upward through the channel forming portion 37, and is then blown out by the first fan 101 through the first outlet port 29 to the space to be air-conditioned.

[0089]With the above configuration, the air conditioner 1 can perform cooling in two stages, including primary cooling using the heat exchanger 4 and secondary cooling using the vaporization filter 6, on the first air to be blown out to the space to be air-conditioned. Accordingly, in comparison with a direct vaporization method employing only the vaporization filter 6, for example, the air conditioner 1 can further lower the temperature of the first air.

[0090]The air conditioner according to the above embodiment includes a water storage container, a heat exchanger, a housing, and a drawer body. The water storage container is configured to store water. The heat exchanger includes partition walls separating the first heat exchange channels through which a first air flows and second heat exchange channels through which a second air and water supplied from the water storage container flow from each other. The housing accommodates the heat exchanger and the water storage container. The drawer body has the heat exchanger mounted, and is movable between an accommodated position in which the heat exchanger is positioned inside the housing, and a drawn-out position in which the heat exchanger is positioned outside the housing. The drawer body of the air conditioner can position the heat exchanger outside the housing when moved to the drawn-out position. The drawer body of the air conditioner contributes to improving the ease of maintenance of the heat exchanger by the user of the air conditioner.

[0091]The air conditioner includes a first drain pan arranged in the drawer body and configured to receive water discharged from the second heat exchange channels. The first drain pan of the air conditioner contributes to restricting water discharged from the second heat exchange channels of the heat exchanger from adhering to unintended locations inside the housing during the movement of the drawer body to the drawn-out position. The first drain pan of the air conditioner contributes to restricting water discharged from the second heat exchange channels of the heat exchanger from leaking around the housing at the time of the movement of the drawer body to the drawn-out position.

[0092]The air conditioner includes a second drain pan arranged in the housing, and a drain piping connected to the first drain pan and allowing water received by the first drain pan to flow toward the second drain pan through the drain piping both in a state where the drawer body is in the accommodated position and in a state where the drawer body is in the drawn-out position. The second drain pan and the drain piping of the air conditioner contribute to restricting, during the movement of the drawer body to the drawn-out position, water from overflowing from the first drain pan and water discharged from the second heat exchange channels of the heat exchanger from adhering to unintended locations inside the housing. The second drain pan and the drain piping of the air conditioner contribute to restricting the drawer body from becoming heavy due to water received by the first drain pan and causing the movement of the drawer body between the accommodated position and the drawn-out position to be hindered.

[0093]The first drain pan of the air conditioner includes a first receiving portion for receiving water discharged from the second heat exchange channels, and a water discharge port positioned further upstream relative to the first receiving portion in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position. The water discharge port allows water received by the first receiving portion to be discharged. The drain piping is connected to the water discharge port. The drain piping of the air conditioner contributes to shortening the length of the drain piping and simplifying the configuration of the drain piping in comparison with a case in which the downstream side portion of the first drain pan in the drawn-out direction and the drain piping are connected to each other.

[0094]The air conditioner includes a vaporization filter mounted in the drawer body and positioned further upstream relative to the heat exchanger in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position. The vaporization filter allows water to be supplied from the water storage container to the vaporization filter, and allows the first air that has flowed through the first heat exchange channels to flow through the vaporization filter. The drawer body of the air conditioner contributes to improving the ease of maintenance of the heat exchanger and the vaporization filter in comparison with a case in which the vaporization filter is not mounted in the drawer body.

[0095]The air conditioner includes a vaporization filter mounted in the drawer body and positioned further upstream relative to the heat exchanger in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position. The vaporization filter allows water to be supplied from the water storage container to the vaporization filter, and allows the first air that has flowed through the first heat exchange channels to flow through the vaporization filter. The first drain pan includes a first receiving portion for receiving water discharged from the second heat exchange channels, a second receiving portion for receiving water discharged from the vaporization filter, and a drain wall separating the first receiving portion and the second receiving portion from each other. A communication hole providing communication between the first receiving portion and the second receiving portion is arranged on a lower end portion of the drain wall. The first drain pan of the air conditioner can restrict the second air flowing through the first drain pan from being mixed with other air.

[0096]The first drain pan of the air conditioner includes a first support portion supporting the heat exchanger from below. The first drain pan of the air conditioner can simplify the configuration of the drawer body in comparison with a case in which the first support portion is arranged in a portion other than the first drain pan.

[0097]The first drain pan of the air conditioner includes a second support portion supporting, in cooperation with the drain wall, the vaporization filter from below. The first drain pan of the air conditioner can simplify the configuration of the drawer body in comparison with a case in which the second support portion is arranged in a portion other than the first drain pan.

[0098]The air conditioner includes rails for guiding the movement of the drawer body. The drawer body includes frames fitted in the respective rails, and a decorative board. The decorative board is connected to the downstream end portions of the frames in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position, extends in a direction crossing a longitudinal direction of the frames, and constitutes an outer peripheral surface of the air conditioner in cooperation with the housing in a state where the drawer body is in the accommodated position. An intake port through which the first air drawn into the housing flows is formed on the decorative board. The air conditioner includers an air filter mounted in the drawer body and arranged between the intake port and the heat exchanger. The drawer body of the air conditioner contributes to improving the ease of maintenance of the heat exchanger and the air filter in comparison with a case in which the air filter is not mounted in the drawer body.

[0099]The air conditioner includes rails for guiding the movement of the drawer body. The first drain pan is arranged on frames. The drawer body includes the frames fitted in the respective rails, a decorative board, and beam members. The decorative board is connected to the downstream end portions of the frames in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position, extends in a direction crossing a longitudinal direction of the frames, and constitutes an outer peripheral surface of the air conditioner in cooperation with the housing in a state where the drawer body is in the accommodated position. The beam members connect the corresponding frames and the decorative board to each other. The beam members of the air conditioner contribute to dispersing the force applied to the decorative board at the time of the movement of the drawer body.

[0100]An intake port through which the first air drawn into the housing flows is formed on the decorative board. The frames are connected to the decorative board at positions downward of the intake port. The decorative board includes a drawer handle at a position downward of the intake port. The drawer handle is configured to be operated when moving the drawer body. The drawer handle of the air conditioner contributes to reducing the likelihood in which the decorative board flexes when the drawer handle is operated in comparison with a case in which the drawer handle is disposed upward of the intake port.

[0101]The air conditioner includes a regulating member configured to regulate the drawer body from moving from the accommodated position toward the drawn-out position. The regulating member of the air conditioner contributes to restricting the drawer body in the accommodated position from moving toward the drawn-out position at an unintended timing.

[0102]The regulating member includes engaging parts arranged on the housing, and engagement parts arranged on the drawer body. The engagement parts regulate the movement of the drawer body in a state where the engagement parts are in engagement with the respective engaging parts. The drawer body includes a drawer handle for switching the position of the engagement parts between an engagement position in which the engagement parts are engageable with the respective engaging parts, and a disengagement position in which the engagement parts are not engageable with the respective engaging parts. The regulating member of the air conditioner contributes to restricting the drawer body in the accommodated position from moving toward the drawn-out position at an unintended timing with a relatively simple configuration, i.e., the engaging parts and the engagement parts.

[0103]The heat exchanger includes a first outer wall. The drawer body has a first opposing wall opposing the first outer wall of the heat exchanger. One of the first outer wall and the first opposing wall includes first ribs. The other of the first outer wall and the first opposing wall has a first groove in which the first ribs are fitted. The first ribs and the first groove of the air conditioner contribute to facilitating an operation of placing the heat exchanger in a predetermined position in the drawer body during maintenance.

[0104]The vaporization filter includes a second outer wall. The drawer body has a second opposing wall opposing the second outer wall of the vaporization filter. One of the second outer wall and the second opposing wall includes second ribs. The other of the second outer wall and the second opposing wall has a second groove in which the second ribs are fitted. The second ribs and the second groove of the air conditioner contribute to facilitating an operation of placing the vaporization filter in a predetermined position in the drawer body during maintenance.

[0105]The air conditioner includes a first protrusion and a second protrusion. The first protrusion protrudes downward inside the housing. The first protrusion contacts an upper surface of the heat exchanger in a state where the drawer body is in the accommodated position. The second protrusion protrudes further downward, inside the housing, relative to a lower end of the first protrusion on the upstream side relative to the first protrusion in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position. The second protrusion contacts the upper surface of the heat exchanger in a state where the drawer body is in the accommodated position. The first protrusion and the second protrusion of the air conditioner contribute to pressing the upper surface of the heat exchanger downward by the first protrusion and the second protrusion when the drawer body has been moved to the accommodated position while facilitating the movement of the drawer body to the drawn-out position.

[0106]The length of the heat exchanger in a width direction, which is orthogonal to both a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position and an up-down direction, becomes shorter as extending toward the upstream side in the drawn-out direction than the downstream side. The heat exchanger of the air conditioner contributes to improving the operability of the drawer body in comparison with a case in which the length of the heat exchanger in the width direction becomes longer as extending toward the upstream side in the drawn-out direction than the downstream side.

[0107]The length of the heat exchanger in an up-down direction becomes shorter as extending toward the upstream side in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position than the downstream side. The heat exchanger of the air conditioner contributes to improving the operability of the drawer body in comparison with a case in which the length of the heat exchanger in the up-down direction becomes longer as extending toward the upstream side in the drawn-out direction than the downstream side.

[0108]The heat exchanger includes a flange part on a upstream portion in the drawn-out direction. The flange part contacts an upper surface of the vaporization filter. The flange part of the air conditioner contributes to restricting air other than the first air from entering the first channel of the first air through a gap between the heat exchanger and the vaporization filter.

[0109]The air conditioner includes a first wall protruding downward inside the housing, and a second wall protruding downward inside the housing on the upstream side relative to the first wall in a drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position. The heat exchanger includes a first contact part protruding upward on a downstream end portion of an upper surface of the heat exchanger in the drawn-out direction, and a second contact part protruding upward on a upstream end portion of the upper surface of the heat exchanger in the drawn-out direction. The first contact part contacts the first wall in a state where the drawer body is in the accommodated position. The second contact part contacts the second wall in a state where the drawer body is in the accommodated position. The first wall, the second wall, the first contact part, and the second contact part of the air conditioner contribute to restricting the first air and the second air from mixing each other with a relatively simple configuration.

[0110]The air conditioner includes a channel forming portion arranged inside housing and constituting a channel through which the first air that has flowed through the vaporization filter flows. The vaporization filter includes a water receiving rib on a lower end of the vaporization filter in an up-down direction. The water receiving rib protrudes further toward the upstream side in the drawn-out direction relative to the first drain pan, and extends along a width direction orthogonal to both the drawn-out direction and the up-down direction. By virtue of the water receiving rib arranged on the lower end of the vaporization filter of the air conditioner, water discharged toward the channel forming portion from the vaporization filter following the flowing of the first air can be guided to the first drain pan. Accordingly, water remaining in the housing can be reduced.

[0111]The air conditioner according to the above embodiment includes a housing, a first intake port, a second intake port, a heat exchanger, a vaporization filter, a first outlet port, and a second outlet port. The first intake port is arranged on a first side wall of the housing and allows a first air to be drawn into the housing through the first intake port. The second intake port is arranged on the first side wall and allows a second air to be drawn into the housing through the second intake port. The heat exchanger has first heat exchange channels through which the first air drawn through the first intake port flows, and second heat exchange channels through which the second air drawn through the second intake port flows and to which water is supplied. The vaporization filter is configured to cool the first air with latent heat of water. The first outlet port allows the first air drawn through the first intake port and flowing through the first heat exchange channels of the heat exchanger and the vaporization filter to be blown out of the housing through the first outlet port. The first outlet is arranged on the housing. The second outlet port allows the second air drawn through the second intake port and flowing upward through the second heat exchange channels to be blown out of the housing through the second outlet port. The second outlet port is arranged on the housing at a position further upstream relative to an outlet of the second heat exchange channels of the heat exchanger. In the heat exchanger of the air conditioner, a direction in which the second air flows through the second heat exchange channels coincides with a direction in which the second outlet port is arranged relative to the outlet of the second heat exchange channels of the heat exchanger. Therefore, the air conditioner enables the second air to flow upward through the second heat exchange channels to the second outlet port, thereby reducing the pressure loss of the second air compared to known technologies. Since the first intake port and the second intake port are arranged on the same first side wall, the configuration inside the housing can be simplified in comparison with a case in which the first intake port and the second intake port are arranged on different side walls, thereby contributing to reducing the size of the housing.

[0112]The air conditioner further includes a first piping through which water to be supplied to the second heat exchange channels flows. The first piping is arranged directly above the heat exchanger. Since a direction in which water to be supplied to the second heat exchange channels flows and a direction in which the second air flows are opposite from each other, the efficiency of heat exchange of the air conditioner with heat of vaporization of the water flowing through the second heat exchange channels is high in comparison with a case in which both directions are not opposite from each other.

[0113]The air conditioner includes a second piping through which water to be supplied to the vaporization filter flows, and a pump configured to send water to both the first piping and the second piping. The second piping is arranged directly above the vaporization filter. In a water supply channel including the pump, the first piping, and the second piping, the pump, the first piping, and the second piping are connected in order of the pump, the first piping, and the second piping from the upstream side toward the downstream side in a direction in which water flows in the water supply channel. By arranging the first piping on the upstream side relative to the second piping in the water supply channel of the air conditioner, the heat exchanger can be supplied with water at a higher pressure than the vaporization filter.

[0114]The second piping is positioned further downward relative to the first piping in a vertical direction. In the air conditioner, water is more likely to reach the second piping in comparison with a case in which the second piping is positioned further upward relative to the first piping.

[0115]A first distance between the first piping and the heat exchanger in a vertical direction is greater than a second distance between the second piping and the vaporization filter in the vertical direction. Since the first distance is set greater than the second distance, the air conditioner both restricts the first air from leaking from the vaporization filter and enables the second air to flow smoothly on the downstream side of the second heat exchanger channels.

[0116]The housing includes a second side wall opposite the first side wall, a third side wall connected to both the first side wall and the second side wall, and a fourth side wall opposite the third side wall. The air conditioner includes a first fan configured to cause the first air to flow through a first channel extending from the first intake port to the first outlet port and including the first heat exchange channels, a fan motor configured to drive the first fan, a third piping arranged along the third side wall and connected to the first piping, and a power supply harness arranged along the fourth side wall and configured to supply electric power to the fan motor. Positioning the third piping and the power supply harness of the air conditioner to be spaced apart from each other can reduce the likelihood of the occurrence of electrical leakages and short circuits in comparison with a case in which the third piping and the power supply harness are positioned together.

[0117]The second heat exchange channels constitute a part of a second channel extending from the second intake port to the second outlet port. The air conditioner includes a drain pan arranged directly below the heat exchanger and configured to receive water discharged from the second heat exchange channels. The drain pan constitutes a part of the second channel on the upstream side relative to the second heat exchange channels. The drain pan of the air conditioner can cool the second air before entering the heat exchanger with heat of vaporization of water stored in the drain pan.

[0118]The drain pan includes a first receiving portion in contact with the heat exchanger and configured to receive water discharged from the second heat exchange channels, a second receiving portion in contact with the vaporization filter and configured to receive water discharged from the vaporization filter, and a drain wall separating the first receiving portion and the second receiving portion from each other. The second air passing through the drain pan of the air conditioner that constitutes a part of the second channel is less likely to be mixed with the other air in comparison with a case in which the drain pan does not include the drain wall.

[0119]The first intake port and the second intake port are the same intake port. In the air conditioner, since two different intake ports need not be formed, the housing can be made smaller in comparison with a case in which the first intake port and the second intake port are formed separately from each other.

[0120]The air conditioner includes a first fan configured to cause the first air to flow through the first heat exchange channels, and a second fan configured to cause the second air to flow through the second heat exchange channels. An output of the second fan is smaller than an output of the first fan. In the air conditioner, the pressure loss of the second air can be reduced compared to known air conditioners in which the second air flows upward toward the second outlet port after flowing downward from the second heat exchange channels, thereby maintaining heat exchange effectiveness in the entirety of the air conditioner at high regardless of the fact that the output of the second fan is smaller than that of the first fan.

[0121]The housing includes an upper wall on which the first outlet port and the second outlet port are arranged. The second outlet port is arranged at a position closer to the first side wall than the first outlet port is to the first side wall in a direction in which the first air flows through the first heat exchange channels. The housing of the air conditioner can simplify the channel of the first air and the channel of the second air in the housing in comparison with a case in which the second outlet port is arranged at a position farther from the first side wall than the first outlet port is from the first side wall, thereby contributing to reducing the size of the housing.

[0122]The second outlet port is arranged at a position overlapping the first outlet port in a direction orthogonal to both a vertical direction and the direction in which the first air flows through the first heat exchange channels. The housing of the air conditioner can further simplify the channel of the first air and the channel of the second air in the housing, and contributes to reducing the size of the housing.

[0123]The air conditioner includes a first fan configured to cause the first air to flow through a first channel extending from the first intake port to the first outlet port and including the first heat exchange channels, a second fan configured to cause the second air to flow through a second channel extending from the second intake port to the second outlet port and including the second heat exchange channels, and a fan motor configured to drive the first fan and the second fan. A rotational shaft of the fan motor extends in parallel to the direction in which the first air flows through the first heat exchange channels. The rotational shaft of the fan motor can further simplify the channel of the first air and the channel of the second air within the housing in comparison with a case in which the rotational shaft crosses the direction in which the first air flows through the first heat exchange channels, i.e., crosses the front-rear direction, and can reduce the size of the housing.

[0124]The first fan is arranged at a position overlapping the vaporization filter in the direction in which the first air flows through the first heat exchange channels. In comparison with a case in which the first fan is arranged at a position different from (i.e., a position offset from) the vaporization filter in the direction in which the first air flows through the first heat exchange channels, i.e., in the front-rear direction, the first channel of the first air inside the housing can be shortened, whereby the size of the housing can be reduced.

[0125]The second fan is arranged at a position overlapping the heat exchanger in the direction in which the first air flows through the first heat exchange channels. In comparison with a case in which the second fan is arranged at a position different from (i.e., a position offset from) the heat exchanger in the direction in which the first air flows through the first heat exchange channels, the channel of the second air inside the housing can be shortened, and the size of the housing can be reduced.

[0126]The air conditioner according to the above embodiment includes a housing, a first tank, a first tank accommodating portion, a second tank, a second tank check valve, a second tank accommodating portion, an outlet piping, and a cooling unit. The first tank is configured to store water. The first tank accommodating portion is arranged inside the housing, and accommodates the first tank. The second tank is removably mounted in the housing, and is configured to store water supplied from the first tank. The second tank check valve is arranged on the second tank. The second tank accommodating portion is arranged inside the housing, and accommodates the second tank. The outlet piping is arranged inside the housing, and is connected to the second tank via the second tank check valve. The cooling unit is arranged inside the housing, and is configured to cool air drawn from the outside of the housing with heat of vaporization of water supplied through the outlet piping. Since the second tank is removable from the housing, the second tank of the air conditioner contributes to improving the ease of maintenance of the second tank compared to known technologies. The second tank check valve of the air conditioner contributes to restricting water stored in the second tank from flowing outside the second tank during a process of removal of the second tank from the housing.

[0127]The second tank accommodating portion includes a cover, and a hinge. The hinge fixes the cover in the housing so that the cover is pivotally movable between a closed position in which the cover covers the upper portion of the second tank accommodated in the second tank accommodating portion, and an open position in which the cover opens the upper portion of the second tank accommodated in the second tank accommodating portion. The cover of the air conditioner contributes to restricting the water in the second tank from splashing during the process of removable of the second tank from the inside of the housing.

[0128]The air conditioner includes a drain pan configured to receive water discharged from the cooling unit, and an inlet piping. The inlet piping is piping having flexibility and connecting the cover and the drain pan to each other. The inlet piping of the air conditioner, due to connecting the cover and the drain pan to each other, contributes to reducing the likelihood in which the piping for supplying water from the drain pan to the second tank from interfering with the second tank when the second tank is mounted in and removed from the housing, and eliminating the need for individually moving the piping to avoid such interference.

[0129]The cover includes a cover body, and a hollow tube body having a tube body inlet to which the inlet piping is connected and a tube body outlet to which the cover body is connected. In a state where the cover is in the open position, the tube body outlet is positioned further upward relative to the tube body inlet. Since the tube body outlet is positioned further upward relative to the tube body inlet in a state where the cover is in the open position, the tube body of the air conditioner can hold water supplied from the drain pan at a position between the tube body inlet and the tube body outlet during a process of mounting and removing the second tank, thereby contributing to restraining water from reaching the tube body outlet.

[0130]A retrieving port for removing each of the first tank and the second tank from the housing is formed on a side wall of the housing. The cover body includes a cover body protrusion. The cover body protrusion protrudes upward from the upper surface of the cover body at a position between the tube body and the retrieving port in a state where the cover is in the closed position. The cover body protrusion of the air conditioner contributes to guiding the movement of the first tank to the first tank accommodating portion. The cover body protrusion contributes to restricting the first tank from contacting the tube body at the time of mounting the first tank into the housing.

[0131]The first tank has water supply ports through which water to be supplied from the inside of the first tank to the second tank flows. Insertion holes in which the water supply ports are respectively inserted are formed on the cover body. The cover body of the air conditioner can relatively simplify the configuration in which water in the first tank is supplied to the second tank.

[0132]The air conditioner includes a sealing member arranged between the cover in the closed position and the second tank. The sealing member of the air conditioner can provide the space surrounded by the second tank and the cover in a nearly airtight state. The air conditioner contributes to restricting water stored in the second tank from evaporating and restricting the temperature of the water from changing.

[0133]The second tank includes a second tank handle in a region surrounded by an inner side surface of the second tank. The second tank handle of the air conditioner contributes to improving the operability when the second tank is mounted in and removed from the housing. The second tank handle of the air conditioner contributes to making the second tank compact in comparison with a case in which the second tank handle is arranged outside the region surrounded by the inner side surface of the second tank.

[0134]The second tank handle is arranged on the center portion of the second tank in a longitudinal direction. The second tank handle of the air conditioner contributes to facilitating to keep the second tank balanced at the time of the removal of the second tank from the housing compared to a case in which the second tank handle is arranged at the end portion of the second tank in the longitudinal direction.

[0135]The second tank includes an inline filter in the region surrounded by the inner side surface of the second tank. The inline filter of the air conditioner contributes to restricting foreign matter from entering the piping connected to the second tank even when foreign matter enters the second tank.

[0136]The housing includes a first side wall on which a retrieving port for removing the first tank from the housing is formed. The second tank accommodating portion is arranged closer to the first side wall than to a second side wall opposite the first side wall. The second tank accommodating portion of the air conditioner facilitates the removal of the second tank from the housing compared to a case in which the second tank is arranged closer to the second side wall than to the first side wall.

[0137]The housing includes a first side wall on which a retrieving port for retrieving the first tank from the housing is formed. The inline filter is arranged closer to the first side wall than to a second side wall opposite the first side wall. The inline filter of the air conditioner contributes to facilitating the operation of replacing the inline filter while the first tank is accommodated in the first tank accommodating portion in comparison with a case in which the inline filter is positioned close to the second side wall.

[0138]External communication holes in communication with the outer space of the housing are formed on a bottom wall of the second tank accommodating portion. The external communication holes of the air conditioner contribute to discharging unintended water in the second tank accommodating portion to the outside of the housing of the air conditioner.

[0139]While the invention has been described in conjunction with various example structures outlined above and illustrated in the figures, various alternatives, modifications, variations, improvements, and/or substantial equivalents, whether known or that may be presently unforeseen, may become apparent to those having at least ordinary skill in the art. Accordingly, the example embodiments of the disclosure, as set forth above, are intended to be illustrative of the invention, and not limiting the invention. Various changes may be made without departing from the spirit and scope of the disclosure. Therefore, the disclosure is intended to embrace all known or later developed alternatives, modifications, variations, improvements, and/or substantial equivalents. Some specific examples of potential alternatives, modifications, or variations in the described invention are provided below:

[0140]The configurations, the shapes, the sizes, and the arrangement of the components in the air conditioner, and the number of components in the air conditioner may be modified as appropriate. The shape of the housing may be modified as appropriate. The housing may have a columnar shape or a polygonal prismatic shape. The drawer body may be omitted as appropriate. The configuration of the drawer body may be modified. The arrangement, the shapes, and the sizes of at least one of the first intake port, the second intake port, the first outlet port, or the second outlet port which are arranged on the housing may be modified. The first intake port and the second intake port may be formed individually on different portions of the first side wall. The first outlet port and the second outlet port may be formed in any of the side walls other than the upper wall of the housing. In a case where each of the first outlet port and the second outlet port is formed on the upper wall of the housing, the second outlet port may be arranged at a position farther from the first side wall than the first outlet port is from the first side wall in the direction in which the first air flows through the first heat exchange channels. The second outlet port may be arranged at a position not overlapping the first outlet port in the direction orthogonal to both the vertical direction and the direction in which the first air flows through the first heat exchange channels. The size, the shape, and the arrangement of the retrieving port may be modified as appropriate.

[0141]The air conditioner may not include the rails for guiding the movement of the drawer body. The air conditioner may include a single rail, or may include three or more rails. The arrangement of the drawer body relative to the housing may be modified as appropriate. For example, the arrangement of the drawer body in the up-down direction may be modified, and the lower end portion of the drawer body may be arranged on the lower end portion of the housing. The positions in which the frames are connected to the decorative board may be modified as appropriate. The drawer handle may be arranged on any position upward, leftward, or rightward of the intake port. The drawer body may not include the beam members. The configurations, the shapes, and the arrangement of the beam members, and the number of beam members may be modified as appropriate. The drawer body may have a box shape. The regulating member may be omitted as appropriate. The size, the configuration, and the arrangement of the regulating member, and the number of regulating members may be modified. The air conditioner may include a magnet disposed on the decorative board and a magnetic body disposed in the drawer opening as the regulating member. In this case, in a state where the drawer body is in the accommodated position, the drawer body is regulated from moving in the drawn-out direction due to the magnetic force between the magnet and the magnetic body. The regulating member may not be coupled to the drawer handle. For example, the regulating member may be constituted by a hook disposed on the decorative board and a hole portion formed on the first side wall, and may regulate the drawer body from moving in the drawn-out direction by engaging the hook with the hole portion in a state where the drawer body is in the accommodated position. In a case where the regulating member is constituted by the engaging parts and the engagement parts, the arrangement and the configurations of the engaging parts and the engagement parts, and the number of engaging parts and engagement parts may be modified as appropriate, and the engagement parts may be disposed on the housing.

[0142]The configuration of the cooling unit may be modified as appropriate. The cooling unit may include only one of the heat exchanger and the vaporization filter. The configuration of the heat exchanger may be modified as appropriate. The heat exchanger may not include the heat exchanger case, and may include only the heat exchanger body. The partition walls of the heat exchanger may be constituted by the plurality of sheets and the plurality of spacers, may be constituted only by the plurality of sheets, and may be constituted by arranging a plurality of tubular-shaped bodies. In the heat exchanger, the first direction directed from the inlet toward the outlet of the first heat exchange channels and the second direction directed from the inlet toward the outlet of the second heat exchange channels may be orthogonal to each other, may cross each other, or may be parallel to each other. The heat exchanger may not include the first outer wall. The first ribs may be arranged on the first outer wall, and the first groove in which the first ribs are fitted may be arranged on the first opposing wall. The first outer wall may not include either the first ribs or the first groove. The shapes, the sizes, and the arrangement of the first ribs and the first groove may be modified as appropriate. The shape of the heat exchanger may be modified as appropriate. The length of the heat exchanger in the width direction, which is orthogonal to both the drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position and the up-down direction, may be longer as extending toward the upstream side in the drawn-out direction than the downstream side. The length of the heat exchanger in the up-down direction may be longer as extending toward the upstream side in the drawn-out direction in which the drawer body moves from the accommodated position to the drawn-out position than the downstream side. At least one of the flange part, the first contact part, or the second contact part may be omitted from the heat exchanger. The arrangement and the configurations of the flange part, the first contact part, and the second contact part may be modified as appropriate. The number of flange parts, first contact parts, and second contact parts may be modified as appropriate. In a case where the heat exchanger does not include the flange part, the vaporization filter may include a flange part contacting the upper surface of the heat exchanger.

[0143]The air conditioner may not include the first protrusion and the second protrusion, and may include only one of the first protrusion and the second protrusion. The shapes and the arrangement of the first protrusion and the second protrusion may be modified as appropriate. The first protrusion and the second protrusion may contact the upper surface of the vaporization filter. Although the first protrusion and the second protrusion are formed as a single member, the first protrusion and the second protrusion may be formed as separate components.

[0144]The air conditioner may omit the air filter. The configuration and the arrangement of the air filter may be modified. The air filter may not be mounted in the drawer body. The configuration of the vaporization filter may be modified as appropriate. The vaporization filter may not be mounted in the drawer body, and may be arranged in the housing. The vaporization filter may be mounted in another drawer body different from the drawer body in which the heat exchanger is mounted. The arrangement of the vaporization filter when mounted in the drawer body may be modified as appropriate. As an example, the vaporization filter may be arranged on the downstream side relative to the heat exchanger in the drawn-out direction. In this case, the intake port may be arranged on the decorative board, may be arranged on any of the side walls the housing, i.e., the first through fourth side walls, or may be arranged on the upper wall or the lower wall of the housing. The vaporization filter may not include the water receiving rib. The vaporization filter may not include the second outer wall. The second ribs may be arranged on the second outer wall, and the second groove in which the second ribs are fitted may be arranged on the second opposing wall. The second outer wall may not include either the second ribs or the second groove. The shapes, the sizes, and the arrangement of the second ribs and the second groove may be modified as appropriate.

[0145]The drain pan may be omitted, and the configuration of the drain pan may be modified as appropriate. The drain pan may include only one of the first drain pan and the second drain pan. The sizes, the shapes, and the arrangement of the first drain pan and the second drain pan may be modified as appropriate. The first drain pan may not be disposed on the drawer body. In a case where the first drain pan is disposed on the drawer body, the first drain pan may not be fixed to the frame, and may be fixed to the decorative board. The first drain pan may have the functions of the frames, and may engage with the rails. The drain piping may be omitted from the first drain pan. The shape, the size, and the arrangement of the drain piping may be modified as appropriate. The drain piping may be connected to the bottom wall of the first drain pan, may be piping having flexibility, and may be piping configured to contract. The drain piping may be directly connected to the tube body of the second tank accommodating portion. The first drain pan may not include the second receiving portion and the drain wall, and may be configured to receive only water discharged from the second heat exchange channels of the heat exchanger. The drain wall may not contact the vaporization filter, and may contact the rear-lower end of the heat exchanger. The communication hole may not be formed on the drain wall. The first receiving portion and the second receiving portion may be connected to different drain piping. The first drain pan may not include at least one of the first support portion or the second support portion. For example, at least one of the heat exchanger or the vaporization filter may be supported by the frames of the drawer body. The first drain pan may not function as at least one of the first opposing wall or the second opposing wall. At least one of the first opposing wall or the second opposing wall may be components different from the first drain pan. At least one of the first opposing wall or the second opposing wall may be a flange or a frame connected to the decorative board.

[0146]The configuration of the water storage container may be modified as appropriate. The water storage container may include only one of the first tank and the second tank. The size, the shape, and the arrangement of each tank, and the number of tanks may be modified as appropriate. The second tank may not be removable from the housing. In this case, the second tank check valve need not be arranged on the second tank. A plurality of second tanks may be arranged according to the number of first tanks. At least one of the inline filter or the second tank handle may be omitted from the second tank. The configurations and the arrangement of the inline filter and the second tank handle may be modified as appropriate. The number of inline filters and second tank handles may be modified as appropriate. The second tank handle may be arranged on the one end portion of the second tank in the longitudinal direction. The inline filter may be positioned close the second side wall opposite the first side wall. The second tank handle may be disposed on the second tank at a position outside the region surrounded by the inner side surface.

[0147]The configuration of the water supply unit may be modified as appropriate. The air conditioner may not include the pump and the first through fourth piping. In this case, water may be sucked up and supplied to the cooling unit using a highly absorbent water-retaining cloth such as a nonwoven fabric. The arrangement of the first piping, the second piping, and the third piping may be modified as appropriate. The arrangement of the pump, the first piping, and the second piping in the direction in which water flows in the water supply channel may be modified as appropriate. The pump, the second piping, and the first piping may be arranged in this order from the upstream side toward the downstream side. The position of the second piping in the vertical direction may be the same as the position of the first piping in the vertical direction. Alternatively, the second piping may be positioned further upward relative to the first piping in the vertical direction. The first distance between the first piping and the heat exchanger in the vertical direction may be smaller than or equal to the second distance between the second piping and the vaporization filter in the vertical direction. The arrangement of the third piping may be modified as appropriate, and for example, may be arranged adjacent to the power supply harness. Piping for supplying water to the first piping and piping for supplying water to the second piping may be disposed independently. The inlet piping may be omitted as appropriate. The configuration of the inlet piping may be modified. The inlet piping may be piping having contractility.

[0148]The first fan, the second fan, and the fan motor may be omitted as appropriate, and the configurations, the arrangement, and the sizes of the first fan, the second fan, and the fan motor may be modified. The output of the second fan may be greater than or equal to the output of the first fan. The fan motor may be arranged in the first channel, or may be arranged outside the housing. The first fan may be arranged at a position not overlapping the vaporization filter in the direction in which the first air flows through the first heat exchange channels. The second fan may be arranged at a position not overlapping the heat exchanger in the direction in which the first air flows through the first heat exchange channels.

[0149]The configuration and the arrangement of the second tank accommodating portion may be modified as appropriate. The second tank accommodating portion may be positioned close to the second side wall opposite the first side wall. The configuration of the cover of the second tank accommodating portion of the air conditioner may be modified as appropriate. The second tank accommodating portion may not include the sealing member. The cover may not include at least one of the cover body protrusion or the tube body. The communication hole may not be formed on the cover. The configuration of the tube body may be modified as appropriate. The tube body outlet may be positioned further downward relative to the tube body inlet in a state where the cover is in the open position. The second tank accommodating portion may not include the cover and the hinge. The second drain pan may not be connected to the inlet piping. The external communication holes may not be formed on the bottom wall of the second tank accommodating portion. The number of external communication holes, and the arrangement and the shapes the external communication holes may be modified as appropriate. Furthermore, the bottom wall of the second tank accommodating portion may constitute a part of the lower wall of the housing, and the external communication holes may be in direct communication with the outer space of the housing. Moreover, the external communication holes may be in communication with the outer space via holes formed on the lower end of the side walls of the housing.

[0150]Next, a second tank accommodating portion 239 and a second drain pan 181 according to a modification will be described with reference to FIG. 19. The second tank accommodating portion 239 does not include a cover and a hinge. The second drain pan 181 is not connected to the inlet piping 17. In FIG. 19, components having the same configurations as those in the air conditioner 1 according to the embodiment described above are designated with the same reference numerals. The second tank accommodating portion 239 according to the modification illustrated in FIG. 19 has the same configuration as the second tank accommodating portion according to the embodiment except that the second tank accommodating portion 239 does not include a cover and a hinge. In this modification, the second tank accommodating portion 239 is an example of the “accommodating portion”. The lower end portion of the second drain pan 181 of the air conditioner 1 according to the modification is positioned near the center in the front-rear direction, and is connected to a bending piping 182. The bending piping 182 is a piping having an L-shape, and is connected to the second drain pan 181 so as to be pivotally movable about an axis extending in the up-down direction. When mounting the first tank 201 in the housing 2, the user of the air conditioner 1 positions the bending piping 182 in a posture in which the lower end of the bending piping 182 faces frontward. At this time, since the lower end of the bending piping 182 is positioned further frontward relative to the rear end of the second tank 202, water flowing from the second drain pan 181 flows into the second tank 202 after flowing through the bending piping 182. When removing the second tank 202 after removing the first tank 201 from the housing 2, the user of the air conditioner 1 positions the bending piping 182 in a posture in which the lower end of the bending piping 182 faces rightward or rearward. At this time, the lower end of the bending piping 182 is positioned further rearward relative to the rear end of the second tank 202. Accordingly, the user can easily perform an operation of removing the second tank 202 from the housing 2. The modifications described above may be suitably combined together as long as there are no contradictions.