Denso Corporation

Tomohiro Shimazu

Yasuhiro Mizuno

Yuki Suzuki

Ryohei Tomita

Kazuya Takeuchi

Hiroshi Hamada

Hisayoshi Oshima

Isao Tamada

Shingo Oono

Eiji Nakagawa

Yoshinobu Suzuki

Yuusuke Takagi

A power conversion device includes a connector and a sealing member. The connector is connected to a lead-in pipe of a cooling device on the outside of a case. The sealing member makes a watertight seal between a refrigerant flow pipe, which is the lead-in pipe, and the connector. The sealing member includes a connector-side tubular portion, a first watertight seal projection, and a second watertight seal projection. The connector-side tubular portion is located between an inner peripheral surface of the connector and an outer peripheral surface of the lead-in pipe. The first watertight seal projection projects radially outward in an annular shape from the connector-side tubular portion toward the inner peripheral surface of the connector. The second watertight seal projection projects radially inward in an annular shape from the connector-side tubular portion toward the outer peripheral surface of the lead-in pipe.

Power conversion device

A heat exchanger has a tube and an inner fin. A heat medium exchanging heat with a heat exchange target flows in the tube, and the tube has a flat shape in cross section perpendicular to a flow direction of the heat medium. The inner fin has first fins and second fins. The second fins are formed parallel to the flow direction in at least one of an upstream end portion located on an upstream side of an area, in which the first fins are formed, in the flow direction or a downstream end portion located on a downstream side of the area in the flow direction. Fin pitches between the first fins are all identical with each other. At least one of fin pitches between the second fins is different from other fin pitches between the second fins.

Heat exchanger

A cooling module has a heat generating body, a heat exchanger made of metal, and an insulating plate. The heat generating body has a heat dissipating surface. The heat exchanger has cooling surface facing the heat dissipating surface. The insulating plate has a first surface and a second surface. The insulating plate is interposed between the heat dissipating surface and the cooling surface on a condition that the insulating plate faces the heat dissipating surface and that the second surface faces the cooling surface. The insulating plate and the cooling surface are joined to be one body by a joining material. The heat dissipating surface and the insulating plate are in close contact with each other through an elastic member. The heat dissipating surface and the cooling surface are thermally connected to each other through the joining material, the insulating plate, and the elastic member.

Cooling module

A cooler module has a cooling tube and a support member. The cooling tube has a first protruding tube portion and a second protruding tube portion. The first protruding tube portion is provided with a first flexible portion formed in an annular shape. The second protruding tube portion is provided with a second flexible portion formed in an annular shape. The support member has a first fitting portion fitted to the first protruding tube portion and a second fitting portion fitted to the second protruding tube portion. The support member supports a longitudinal center portion of the cooling tube on a condition that the first protruding tube portion and the first fitting portion are fitted together, the second protruding tube portion and the second fitting portion are fitted together, and the first flexible portion and the second flexible portion are recessed toward an inside of the cooling tube.

Cooler module, and method for manufacturing cooler module

A stacked cooler includes flow pipes that are stacked, each of the flow pipes having a flat shape and including a medium passage in which a heat medium flows, a heat exchange object that is disposed between each adjacent two of the flow pipes and is clamped between their flat planes, a protruding pipe part that is connected to at least one of the flow pipes and protrudes in a stacking direction of the flow pipes, and a load restraining part that restrains a load applied to a connection portion of the at least one of the flow pipes to the protruding pipe part as compared with a load applied to the other portion of the at least one of the flow pipes.

Stacked cooler

A cooler includes a cooling pipe having a cooling surface in contact with a heat-exchanged component, and a refrigerant passage. A pair of outer passages are formed between a pair of opposed inner wall surfaces which are located at both ends of an inner wall surface of the cooling pipe in a perpendicular direction and which constitute the refrigerant passage, and a pair of partition walls that are located at both ends of an inner fin in the perpendicular direction. At least one flow-regulating rib is formed in the refrigerant passage to project into the refrigerant passage at a position inward of the pair of outer passages in the perpendicular direction and at a position outward of an inflow hole and a discharge hole in the perpendicular direction as well as at a position outward of the inner fin in an arrangement direction and at a position inward of the inflow hole and the discharge hole in the arrangement direction. The flow-regulating rib is configured to restrict flow rates of refrigerant through the pair of outer passages.

Cooler

A fiber aggregate contains fine carbon fibers and fine boron nitride fibers. Desirably the boron nitride fibers form an outer layer portion of the fiber aggregate and the fine carbon fibers form a core portion of the fiber aggregate. Desirably the fine carbon fibers and the fine boron nitride fibers are twisted with each other. Desirably the fine carbon fibers are carbon nanotubes and the fine boron nitride fibers are boron nitride nanotubes. Desirably the fiber aggregate further contains boron-containing fine carbon fibers. The fine boron nitride fibers are formed by substituting carbon atoms of fine carbon fibers by boron atoms and nitrogen atoms. The fiber aggregate is fabricated by mixing a fiber aggregate that contains fine carbon fibers with boron and heating the fiber aggregate mixed with the boron in a nitrogen atmosphere to transform some of the fine carbon fibers into fine boron nitride fibers.

Growing community of inventors

Kariya, Japan

Tomohiro Shimazu