Abstract: A cooling device includes a base material providing a heating element on a first surface and a heat exchanger on a second surface opposite to the first surface, the heat exchanger receiving heat from the heating element to perform heat exchange with a refrigerant, and a case material including a refrigerant inflow port and a refrigerant outflow port, the refrigerant inflow port supplying the refrigerant to the heat exchanger. The case material is attachable to the base material in two forms of a first form and a second form, the first form being a form in which the refrigerant inflow port and the refrigerant outflow port are attached to the base material in a first direction, and the second form being a form in which the refrigerant inflow port and the refrigerant outflow port are attached to the base material in a second direction different from the first direction.

Abstract: There is provided a tube coupling configured to connect and couple two tubes that are configured to cause a fluid to flow inside the two tubes. The tube coupling includes: a male connector including a first pipe configured to cause the fluid to flow inside the first pipe, and an insertion part having a protruding shape protruding in an axial direction that is an insertion direction; and a female connector including a second pipe configured to cause the fluid to flow inside the second pipe, and an insertion receiving part having a recessed shape recessed in the axial direction and coupled to the insertion part when the insertion part is inserted into the insertion receiving part. The insertion part includes a first spring, a first pressing member having a protruding shape, a first seal member having an annular shape, and a first outer peripheral member surrounding the first pressing member.

Abstract: There is provided a tube coupling configured to connect and couple two tubes that are configured to cause a fluid to flow inside the two tubes. The tube coupling includes: a male connector including an insertion part having a protruding shape protruding in an axial direction that is an insertion direction; and a female connector including an insertion receiving part having a recessed shape recessed in the axial direction and coupled to the insertion part when the insertion part is inserted into the insertion receiving part. The insertion part includes a projection disposed on a side surface of the male connector. The insertion receiving part includes a first through hole on a side surface of the female connector. The first through hole extends in a direction inclined with respect to the axial direction, and is configured to allow the projection to move in the first through hole.

Abstract: A light source device includes: a light emitting element; a heat slinger including a first surface in contact with the light emitting element and a second surface opposite to the first surface; a thermoelectric element including a heat absorbing surface in contact with the second surface and a heat radiating surface opposite to the heat absorbing surface, the thermoelectric element producing a temperature difference upon having current flowing in the thermoelectric element; a heat sink in contact with the heat radiating surface; a frame body that is open in a stacking direction of the light emitting element, the heat slinger, the thermoelectric element, and the heat sink, and supports the light emitting element, the heat slinger, the thermoelectric element, and the heat sink in a stacked state; and a sealing member that is filled in the frame body to cover the heat slinger and the thermoelectric element.

Abstract: A cooling device of a projection display apparatus includes a first heat receiving unit including an opening that is rectangular. The first heat receiving unit includes a flow path part that forms the opening. An image display element of the projection display apparatus includes a first front face located in front of a reflective image display, a second front face parallel to the first front face and located behind and outside the first front face, and a first side face located between the first front face and the second front face. The first front face is inserted into the opening, and the flow path part is in contact with the first side face and the second front face via a heat conductive member. The flow path part includes a front face that is flush with or in front of the first front face of the image display element.

Abstract: A heat exchanger includes a plurality of heat exchange tubes stacked with a gap through which a first fluid can pass. The heat exchange tube includes: an internal flow path through which a second fluid for exchanging heat with the first fluid and which includes a folded portion; a plurality of slits provided between two flow path portions in the internal flow paths, the two flow path portions each extending from the folded portion and facing each other at an interval; and a plurality of protruding support portions in contact with another adjacent heat exchange tube to form the gap. As viewed in a stacking direction of the plurality of heat exchange tubes, at least one of the plurality of slits extends in a state where a center in an extending direction thereof deviates from a straight line connecting the two adjacent protruding support portions.

Abstract: A reservoir tank includes: a tank main body configured to store a refrigerant within the tank main body; an inflow path configured to allow the refrigerant to flow into the tank main body; an outflow path configured to allow the refrigerant to flow out of the tank main body; a collision member that has a first surface and faces an outlet of the inflow path within the tank main body, wherein the collision member is configured such that the refrigerant flowing out from the outlet of the inflow path collides against the first surface; and an air bubble mixing prevention member that faces an inlet of the outflow path within the tank main body, wherein the air bubble mixing prevention member is configured to prevent air bubbles from getting into the outflow path.

Abstract: A light source device includes: a light emitting element; a heat slinger including a first surface in contact with the light emitting element and a second surface opposite to the first surface; a thermoelectric element including a heat absorbing surface in contact with the second surface and a heat radiating surface opposite to the heat absorbing surface, the thermoelectric element producing a temperature difference upon having current flowing in the thermoelectric element; a heat sink in contact with the heat radiating surface; a frame body that is open in a stacking direction of the light emitting element, the heat slinger, the thermoelectric element, and the heat sink, and supports the light emitting element, the heat slinger, the thermoelectric element, and the heat sink in a stacked state; and a sealing member that is filled in the frame body to cover the heat slinger and the thermoelectric element.

Abstract: A semiconductor power conversion apparatus capable of protecting an IGBT from an overvoltage by supplying a sufficient gate current to the gate of the IGBT. The IGBT is protected from the overvoltage by connecting clamping elements connected in series between a collector of the IGBT and the gate thereof, and by connecting a resistor to each of different junction points between the clamping elements connected in series.

Abstract: A semiconductor power conversion apparatus capable of protecting an IGBT from an overvoltage by supplying a sufficient gate current to the gate of the IGBT. The IGBT is protected from the overvoltage by connecting clamping elements connected in series between a collector of the IGBT and the gate thereof, and by connecting a resistor to each of different junction points between the clamping elements connected in series.

Abstract: An electrolyte for a fuel cell comprising a proton conducting resin comprising a backbone comprising a polyurea resin and side chains that comprise an active hydrogen group at a terminal and a fuel cell employing the same are provided. The electrolyte has improved proton conductivity, heat resistance, and mechanical strength.

Abstract: A bearded needle comprises a needle shank whose tip is shaped into a thin shank portion by tapering down the thickness of the needle shank. The thin shank portion has a conical projection portion at the extremity thereof. The conical projection portion has a hooking tip portion to form a hooking portion at the tip of the needle shank. The hooking portion has a substantially U-shaped bottom portion that hooks and holds a thread, and includes sloping surfaces each inclining toward an outer edge of the hooking tip portion. The sloping surfaces each extend from the bottom portion over both the conical projection portion and the hooking tip portion.

Abstract: A semiconductor power conversion apparatus capable of protecting an IGBT from an overvoltage by supplying a sufficient gate current to the gate of the IGBT. The IGBT is protected from the overvoltage by connecting clamping elements connected in series between a collector of the IGBT and the gate thereof, and by connecting a resistor to each of different junction points between the clamping elements connected in series.

Abstract: A bearded needle comprises a needle shank whose tip is shaped into a thin shank portion by tapering down the thickness of the needle shank. The thin shank portion has a conical projection portion at the extremity thereof. The conical projection portion has a hooking tip portion to form a hooking portion at the tip of the needle shank. The hooking portion has a substantially U-shaped bottom portion that hooks and holds a thread, and includes sloping surfaces each inclining toward an outer edge of the hooking tip portion. The sloping surfaces each extend from the bottom portion over both the conical projection portion and the hooking tip portion.

Abstract: A cooling device includes a heat-radiating device and a centrifugal pump provided in a closed circulation passage for circulating refrigerant. The centrifugal pump contacts and absorbs heat from heat-generating electronic parts by heat exchange of the refrigerant therein to radiate the heat via the heat-radiating device. The centrifugal pump includes a lower casing that comes into contact with the heatgenerating electronic parts, an upper casing disposed to face the lower casing to form a pump chamber, and an impeller sandwiched between the upper casing and the lower casing. The lower casing includes a recessed conical surface facing the impeller, at least one protrusion provided in a center portion of the recessed conical surface and a contact face with which the heat-generating electronic parts come into contact formed directly below the protrusion on an opposite side of the recessed conical surface.

Abstract: A cooling device for cooling a heat-generating component includes a circulating passage arranged to have coolant circulate therein, a centrifugal pump including a first case made of metallic material, a second case made of resin material, and an impeller accommodated in the pump chamber, and a radiator provided at the circulating passage and being operable to release heat from the coolant. The first case has a surface arranged to contact the heat-generating component. The second case forms a pump chamber between the first case and the second case. The pump chamber stores the coolant therein. The impeller includes open-type vanes arranged to pressurize the coolant as to have the coolant flow through the circulating passage. The cooling device has a high cooling efficiency as well as a high operating efficiency of the motor while having a simple construction and a small overall size and a small thickness.

Abstract: A cooling device including a heat-radiating device and a centrifugal pump provided in a closed circulation passage for circulating refrigerant. The centrifugal pump comes into contact with heat-generating electronic parts to absorb heat from the heat-generating electronic parts by the heat exchange of the refrigerant therein to radiate the heat via the heat-radiating device. A pump chamber of the centrifugal pump is defined by a combination of a plurality of casings, that is, an upper casing, a ring-shaped sealing member and a lower casing. A contacting surface that comes in a surface contact with the heat-generating electronic parts, and a recessed conical surface that faces an impeller are formed in the lower casing of the casings that comes into a direct contact with the heat-generating electronic parts. A plurality of heat-radiating pins protruding toward the impeller is provided in a center portion of the recessed conical surface.

Abstract: An electrolyte for a fuel cell comprising a proton conducting resin comprising a backbone comprising a polyurea resin and side chains that comprise an active hydrogen group at a terminal and a fuel cell employing the same are provided. The electrolyte has improved proton conductivity, heat resistance, and mechanical strength.