Abstract: A heat receiver is configured to cool down a liquid crystal panel in a rectangular shape used for a liquid crystal projector that causes light to be transmitted through the liquid crystal panel and thereby displays a projected image. The heat receiver includes a window portion in a rectangular shape formed to come into contact with an outer periphery of the liquid crystal panel; a flat annular flow path formed on an outer circumferential side of the window portion to surround the window portion and configured to have a narrowed portion in a region along one side of the window portion; and two supply discharge flow paths formed in a neighborhood of two corners of the window portion arranged across the narrowed portion to supply and discharge a heat exchange medium.

Abstract: A heat receiver is configured to cool down a liquid crystal panel in a rectangular shape used for a liquid crystal projector that causes light to be transmitted through the liquid crystal panel and thereby displays a projected image. The heat receiver includes a window portion in a rectangular shape formed to come into contact with an outer periphery of the liquid crystal panel; a flat annular flow path formed on an outer circumferential side of the window portion to surround the window portion and configured to have a narrowed portion in a region along one side of the window portion; and two supply discharge flow paths formed in a neighborhood of two corners of the window portion arranged across the narrowed portion to supply and discharge a heat exchange medium.

Abstract: A radiator includes an inlet line and an outlet line for a coolant to be cooled, and a plurality of flow passage units each being connected to the inlet and outlet lines respectively in parallel with adjacent flow passages with a space therebetween. Due to this configuration, it is possible to attain a high cooling capability with a small flow speed of the coolant, which is enabled by increasing the number of the flow passage units with respect to a certain flow rate passing through the inlet and outlet lines. This radiator can be employed for a cooling system together with a fan blowing air toward the flow passage units of the radiator, a coolant jacket for absorbing heat from a heat source such as a CPU, and a fluid pump for circulating the coolant between the coolant jacket and the radiator.

Abstract: A brazed channel plate includes a plurality of brazing sheets stacked on top of one another and bonded to each other with a channel formed therebetween, in which occurrence of clogging of the channel due to molten brazing material is suppressed. At least one of the outermost brazing sheets in the stacking direction has a brazing material escape aperture extending to a bonding surface facing the channel space.

Abstract: A liquid cooling system includes a heat-radiating sheet having a pair of heat-conductive metal plates that are superimposed on each other, and having a circulating flow passage between the pair of heat-conductive metal plates; a plurality of heat-receiving areas partitioned on the heat-radiating sheet; a plurality of heat-generating elements installed on each of the heat-receiving areas via a heat spreader made of a heat-conductive material; an inlet hole and an outlet hole opened to the surface of the heat-radiating sheet and located at both ends of the circulating flow passage; a pump having a discharge port and a suction port that communicate with the inlet hole and the outlet hole, and installed on the heat-radiating sheet; and a radiator continuous with the circulating flow passage of the heat-radiating sheet.

Abstract: Embodiments of the present disclosure may include a liquid cooling system in which an inlet hole and an outlet hole that are located at both ends of a circulating flow passage opened onto a heat-radiating sheet having the circulating flow passage between a pair of heat-conductive metal plates that are superimposed on each other, a pump having a discharge port and a suction port that communicate with the inlet hole and the outlet hole installed on the heat-radiating sheet, a heat-generating element set on the heat-radiating sheet via a heat spreader, and used as a heat-receiving area, and the circulating flow passage having a heat-absorbing flow passage located in a lower face of the heat spreader and a heat-radiating flow passage located in the heat-radiating area other than the heat spreader and having a sufficiently larger length than the flow passage length of the heat-absorbing flow passage.

Abstract: Embodiments of the present disclosure may include a piezoelectric pump having: a piezoelectric vibrator including a main shim that may be formed of a conductive thin metal plate and a piezoelectric element layer that may be formed on the main shim; and a pair of ring-shaped support members that may support front and rear sides of a circumferential portion of the piezoelectric vibrator such that a pump chamber and an air chamber formed on the front and rear sides of the piezoelectric vibrator may be fluid-tightly sealed. The ring-shaped support members may support both sides of a circumferential portion of the piezoelectric element layer of the piezoelectric vibrator, and the piezoelectric vibrator may be vibrated to perform a pumping operation.

Abstract: Embodiments of the present disclosure may include a piezoelectric pump having: a piezoelectric vibrator whose periphery may be fluid-tightly sealed; and a pump chamber and an air chamber that may be formed on front and rear sides of the piezoelectric vibrator. The piezoelectric vibrator may include: a main shim that may be formed of a conductive thin metal plate; a plurality of piezoelectric element layers that may be formed on the main shim; and an intermediate shim that may be formed between the plurality of piezoelectric element layers and may be made of an elastic metal material having mechanical recovery. The piezoelectric vibrator may be vibrated to perform a pumping operation.

Abstract: There is provided a water-cooled heat sink including first and second heat transfer channel plates that are stacked and coupled together. The first heat transfer channel plate is provided with a continuous recess that is located in a facing surface thereof that faces the second heat transfer channel plate, corresponds to the coolant channel, and is open at the facing surface, the second heat transfer channel plate is provided with a continuous protrusion, which is fitted into the recess of the first heat transfer channel plate with a gap therebetween, in a facing surface thereof that faces the first heat transfer channel plate, and the first and second heat transfer channel plates are stacked and coupled together to define the coolant channel between the recess and the protrusion.

Abstract: A diaphragm pump is provided. The diaphragm includes an upper housing, a diaphragm, and a lower housing. Recessed parts are formed in the surfaces of the upper and lower housings that face the diaphragm to define an upper pump chamber and a lower pump chamber above and below the diaphragm. A suction port and a discharge port are formed in the lower housing to communicate with the lower pump chamber. Branch channels are formed in the lower housing and the upper housing to communicate the suction port and the discharge port with the upper pump chamber. Suction-side check valves are respectively provided between the suction port and the upper pump chamber and between the suction port and the lower pump chamber. Discharge-side check valves are provided between the discharge port and the upper pump chamber and between the discharge port and the lower pump chamber.

Abstract: A diaphragm pump is provided. The diaphragm pump comprises a housing that comprises a concave portion, a suction port and a discharge port; a diaphragm; a first and second pump chamber; and a suction-side check valve and a discharge-side check valve. The suction-side and discharge-side check valves are more distant from the diaphragm in the inner end side of the suction and discharge ports and are closer to the diaphragm in the outer end side of the suction and discharge ports.

Abstract: A diaphragm pump is provided. The diaphragm pump comprises an upper and lower housing, a pump chamber plate, a pair of pump chambers, and a diaphragm that separates the pair of pump chambers. First and second suction-side check valves are disposed between the pair of pump chambers and a suction port. First and second discharge-side check valves are disposed between the pair of pump chambers and a discharge port. The lower housing comprises a first pump chamber concave portion. The pump chamber plate comprises a second pump chamber concave portion, the second suction-side check valve, and the second discharge-side check valve. An interplate suction-side channel and an interplate discharge-side channel are provided between the upper housing and the pump chamber plate.

Abstract: A piezoelectric pump is provided. The piezoelectric pump includes a piezoelectric vibrator including a piezoelectric member. Recesses of a housing form variable volume chambers between the recesses and the piezoelectric vibrator. Sealing members are provided along the recesses and in contact with the piezoelectric vibrator to form the variable volume chambers. A feeding terminal for the piezoelectric member is provided on the at least one of the front surface and the rear surface of the piezoelectric vibrator. The planar shape of each of the piezoelectric vibrator and the variable volume chambers and the position of the feeding terminal are set such that the sealing members do not intersect with the feeding terminal in a single plane.