MANN+HUMMEL GmbH

A sorption filter device includes a sorption filter element including at least two sorption bodies with at least one sorbent, the at least two sorption bodies being arranged in a V-shape and enclosing an intermediate space that is open at a head side thereof, an outer sealing element running around an outer circumference of the head side, and an inner sealing surface arranged at the head side and running around a circumference delimiting the intermediate space at the head side. The sorption filter device further includes a housing including a first housing part configured to receive the sorption filter element, and a second housing part detachably connectable to the first housing part and configured to close the housing in a closed state thereof, the sorption filter element being received in the first housing part in such a way that the head side faces the second housing part.

A sensor unit for use in an air filter system operable to separate at least one harmful gas from an air flow. The sensor unit includes at least a first sensor. The first sensor includes two electrodes and a material layer which connects the two electrodes. The electrical resistance of the material layer changes when the material layer comes into contact with the at least one harmful gas. The sensor unit further includes a processing unit configured to determine a time derivative of a change in resistance of the material layer of at least the first sensor and to generate an output signal based on a function of the time derivative determined by the processing unit. A method for producing the sensor unit includes subjecting the material layer of the first sensor to a surface treatment with an acid.

A switching valve includes a housing with valve openings configured to be connected to fluid channels and a piston movable in the housing to control fluid flow between the valve openings and the fluid channels. A first restoring spring subjects the piston to a restoring force. A switching unit moves the piston against the restoring force from a first switching position into a second switching position and back from the second switching position. The piston is held without an energy supply in both first and second switching positions. The switching unit has a base ring with alternating guide grooves and holding ribs and an actuator guided in the guide grooves that moves the piston and has first control surfaces. A switching ring is movable in the base ring and has second control surfaces complementary to the first control surfaces. A second restoring spring supports the switching ring at the actuator.

A ring filter element for air filtration has a filter medium body enclosing an interior. An open end disc and a closed end disc delimit seal-tightly the filter medium body axially. The filter medium body has a folded bellows and an inner wall surface provided with a fold expansion. The open end disc has a cutout aligned with the fold expansion. A filter device has a filter housing with fluid inlet and fluid outlet. A ring filter element arrangement arranged in the filter housing separates fluid inlet from fluid outlet. The ring filter element arrangement has a ring filter element. A positioning device has an engagement element which extends radially outwardly and engages a counter engagement element of the ring filter element which is at least partially formed by the fold expansion at the inner wall surface of the filter medium body of the ring filter element.

A filter device has a housing portion with an inlet and a central outlet for fluid. A housing cover is configured to receive a filter element and is mountable to the housing portion, which has a blocking device operatively connected to an actuation device of the filter element when the housing cover is mounted to the housing portion. The blocking device permits mounting of the housing cover in a release position and blocks mounting of the housing cover in a blocking position. A housing portion for such a filter device is provided with an inlet and a central outlet for fluid and a blocking device to be operatively connectable to the actuation device of the filter element. A filter element for such a filter device is provided received in the housing cover and mounted together with the housing cover on the housing portion.

A stack plate of a stack plate device of a humidifier includes inlay parts extending along two opposing front or longitudinal ends of the stack plate, a semipermeable layer disposed on and being stabilized by the inlay parts, and a frame disposed on multiple portions of the semipermeable layer that are disposed on the inlay parts, the frame circumferentially enclosing a through-opening in the stack plate. A remaining portion of the semipermeable layer completely covers the through-opening. An outer circumferential section of the semipermeable layer and the inlay parts are overmolded by the frame. Opposing front ends of the frame define inflow and outflow regions, respectively, on a first side of the frame for a second fluid, and opposing longitudinal ends of the frame define inflow and outflow regions, respectively, on a second side of the frame for a first fluid.

A filter insert has a filter medium body to be flowed through in flow direction from an inflow face to an outflow face. A support element held at the filter medium body has latches to latch the filter insert to a housing cover. A circumferential seal element is held at the support element. The support element has a grid section extending across the outflow face of the filter medium body. The grid section is integrally formed with the latches. A filter device has a filter housing with a housing cover with an inlet and a housing bottom part with an outlet. The housing cover has latches corresponding to the latches of the filter insert. In a mounted state of the filter device, a raw side in the filter housing is sealed relative to a clean side by the circumferential seal element of the filter insert arranged in the filter housing.

An ion exchanger filter device for a fuel cell system, the ion exchanger filter device including a housing including a cover and at least one inflow opening and at least one outflow opening for a medium, the housing extending in an axial direction, and an ion exchanger cartridge being enclosed by the housing and including one or more inflow ports at an upstream end, and a circumferentially extending wall enclosing a receptacle filled with an ion exchanger material, the wall including one or more outflow ports at a downstream end opposing the upstream end. The upstream end includes a sealing plane to the housing, the sealing plane being inclined to the axial direction by an angle.

A water separator for separating water from a fluid flow includes at least a first separation stage with a first flow-conducting region, which is connected to a fluid conduit. In the fluid conduit, a coarse water separator is arranged. A separation region is connected to a water outlet. The water separator includes at least a second separation stage with a second flow-conducting region, wherein the second separation stage is arranged downstream of the first separation stage. In this context, the second flow-conducting region includes at least one separation element which is exposed to the oncoming fluid flow.

A drain closure element has an element body connectable to a filter housing of a filter system and a bypass valve closing a drain opening of the element body. A filter element for the filter system has a filter medium surrounding an element interior and an end disc connected to the filter medium. The end disc has an element drain opening. A first seal element oriented radially inwardly surrounds the element drain opening which is closable by the drain closure element. The first seal element seals against a first seal surface of the drain closure element. The end disc has a receiving section surrounding the element drain opening for guiding the drain closure element. The receiving section has a second seal element sealing against a seal surface of the filter housing and a third seal element sealing against a second seal surface of the drain closure element.