VAPOR CHAMBER WITH SANDWICHED UPPER WICK

BACKGROUND

Technical Field

[0001]The disclosure relates to a heat exchanger, particularly to a vapor chamber with a sandwiched upper wick.

Related Art

[0002]In a related-art vapor chamber, there is a wick structure in both the upper plate and the lower plate, and the working fluid inside the vapor chamber generates a vapor phase change when heated, thereby transferring the heat from the heated lower plate rapidly to the upper plate through heat conduction, then the vaporized working fluid returns to a liquid state after condensation through the upper plate, and finally flows back into the lower plate from the wick structure.

[0003]However, the wick structure in the upper plate of the related-art vapor chamber is often easily affected by the vaporized working fluid to be not easy to flow back, so it needs to be improved.

[0004]In view of this, the inventors have devoted themselves to the above-mentioned prior art, researched intensively and cooperated with the application of science to try to solve the above-mentioned problems. Finally, the invention which is reasonable and effective to overcome the above drawbacks is provided.

SUMMARY

[0005]An object of the disclosure is to provide a vapor chamber with a sandwiched upper wick, whose upper plate has a double-plate design to clamp at least one wick layer so as to be advantageous to backflow by way of the double-plate arrangement.

[0006]To accomplish the above object, the disclosure provides a vapor chamber with a sandwiched upper wick, which includes a lower plate and an upper plate. The upper plate covers the lower plate to form a chamber between the lower plate and the upper plate. The upper plate includes an outer plate, at least one inner plate superposed with the outer plate and located in the chamber and at least one sandwiched wick layer sandwiched between the outer plate and the inner plate. The lower plate is disposed with a lower wick structure located in the chamber. The sandwiched wick layer is formed with a connecting edge corresponding to a periphery of the inner plate and projecting from the periphery of the inner plate. The connecting edge is in contact with the lower wick structure.

BRIEF DESCRIPTION OF THE DRAWINGS

[0007]FIG. 1 is an exploded view of the first embodiment of the disclosure;

[0008]FIG. 2 is an exploded view of the upper plate of the disclosure from another angle;

[0009]FIG. 3 is a cross-sectional assembled schematic view of the first embodiment of the disclosure;

[0010]FIG. 4 is a cross-sectional assembled schematic view of the second embodiment of the disclosure;

[0011]FIG. 5 is a cross-sectional exploded schematic view of the third embodiment of the disclosure;

[0012]FIG. 6 is a cross-sectional assembled schematic view of the third embodiment of the disclosure; and

[0013]FIG. 7 is a cross-sectional assembled schematic view of the fourth embodiment of the disclosure.

DETAILED DESCRIPTION

[0014]The technical contents of this disclosure will become apparent with the detailed description of embodiments accompanied with the illustration of related drawings as follows. It is intended that the embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.

[0015]Please refer to FIG. 1, which is an exploded view of the first embodiment of the disclosure. The disclosure provides a vapor chamber with a sandwiched upper wick, which includes a lower plate 1 and an upper plate 2 covering the lower plate 1.

[0016]As shown in FIGS. 1 and 3, the lower plate 1 is used for being in contact with a heat source (not shown) and may joined with the upper plate 2 to form a chamber A between the lower plate 1 and the upper plate 2. In detail, the lower plate 1 may be formed with an indent to make the indent covered by the upper plate 2 and sealedly joined with the lower plate 1 to form the chamber A when covered with the upper plate 2. In addition, the lower plate 1 is disposed with a lower wick structure 10. The lower wick structure 10 is located in the chamber A and may be constituted by woven mesh, powder sintered or grooves formed on a surface of the lower plate 1.

[0017]Please refer to FIGS. 1-3. The upper plate 2 includes an outer plate 20, at least one inner plate 21 superposed with the outer plate 20 and having holes and at least one sandwiched wick layer 22 sandwiched between the outer plate 20 and the inner plate 21. The sandwiched wick layer 22 may be formed by woven mesh and is formed with a connecting edge 22a corresponding to a periphery of the inner plate 21 and projecting from the periphery of the inner plate 21. In other words, the sandwiched wick layer 22 is greater than the inner plate 21 in outline size so as to have the connecting edge 22a projecting from a periphery of the inner plate 21. When the upper plate 2 is covered on the lower plate 1, the sandwiched wick layer 22 uses the connecting edge 22a to be in contact with the lower wick structure 10. In the shown embodiments of the disclosure, the lower wick structure 10 is further disposed with a lateral portion 10a attached along the inner wall of the periphery of the chamber A. The lateral portion 10a matches with the inner wall of the periphery of the chamber A and extends toward the outer plate 20 of the upper plate 2 to be in contact with the connecting edge 22a of the sandwiched wick layer 22.

[0018]In addition, as shown in FIG. 4, in the second embodiment of the disclosure, the inner plate 21 of the upper plate 2 may be further disposed with an upper wick structure 23. The upper wick structure 23 is located on a surface of the inner plate 21, which is opposite to the lower plate 1 and may be constituted by woven mesh, powder sintered or grooves formed on a surface of the inner plate 21. In some embodiments, the periphery of the upper wick structure 23 is also in contact with the lower wick structure 10 or further in contact with the lateral portion 10a of the lower wick structure 10.

[0019]Therefore, the vapor chamber with a sandwiched upper wick of the disclosure may be obtained by the above structure.

[0020]In addition, as shown in FIGS. 5 and 6, the third embodiment of the disclosure may further include at least one tube portion 3. The tube portion 3 has a closed end 3a and an open end 3b. A tube wick structure 30 is disposed in the tube portion 3. The tube wick structure 30 may be woven mesh and is extended with a flange 30a from the open end 3b of the tube portion 3. The outer plate 20 of the upper plate 2 is disposed with at least one connecting hole 20a communicating with the open end 3b of the tube portion 3. The size of the connecting hole 20a matches with the open end 3b of the tube portion 3 to be closely connected. The sandwiched wick layer 22 of the upper plate 2 is disposed with at least one linking hole 22b corresponding to the connecting hole 20a. The size of the linking hole 22b is less than the outer diameter size of the flange 30a to allow the tube wick structure 30 to be in contact with the linking hole 22b of the sandwiched wick layer 22 by the flange 30a. And the both adopt the same woven mesh to have a certain material plasticity to accomplish an effect of contact. In addition, the inner plate 21 of the upper plate 2 is further disposed with at least one through hole 21a corresponding to the linking hole 22b so as to make the chamber A formed by the lower plate 1 and the upper plate 2 communicate with the inside of the tube portion 3. At this time, the inner plate 21 may fail to have or be not disposed with one or more holes.

[0021]Further, as shown in FIG. 7, in the fourth embodiment of the disclosure, the tube portion 3 may be formed with a tube end 3c outside the flange 30a of the tube wick structure 30. The tube end 3c may be part of the tube portion 3 and uses a manner such as annularly sectioning to expose the flange 30a to make the linking hole 22b with a smaller size stretch in to be in contact with the flange 30a. Also, the tube end 3c and the inner plate 21 are joined in a stair shape or a perpendicular direction to fix the tube portion 3 on the connecting hole 20a of the upper plate 2.

[0022]Thus, by the vapor chamber with a sandwiched upper wick of the disclosure, the upper plate 2 of the vapor chamber uses the arrangement of the outer plate 20 and the inner plate 21 to make the sandwiched wick layer 22 sandwiched between the outer plate 20 and the inner plate 21 so as to be able to guarantee the backflow of the liquid working fluid. Also, the disclosure may be additionally disposed with a tube portion 3 formed by a heat pipe on the upper plate 2 to constitute a so-called “3D vapor chamber” to be more advantageous to backflow of the tube wick structure 30 in the tube portion 3 and the sandwiched wick layer 22 of the upper plate 2.

[0023]While this disclosure has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of this disclosure set forth in the claims.