A fin satisfies 0<2<tan.sup.1[(L)/{(S1D1)/2L/tan1}], where S1 is a distance between an upstream end and a downstream end of a first inclined portion, D1 is a distance between an upstream end and a downstream end of a flat portion, 1 is an angle between a reference plane and the first inclined portion in the flow direction, 2 is an angle between the reference plane and the second inclined portion in the flow direction, is a distance between the reference plane and the flat portion, and L is a distance between the reference planes of the fins adjacent to each other. 2 gradually decreases as a measurement direction of the angle is shifted from the row direction to the air flow direction and is minimum when the measurement direction is orientated in the air flow direction.

A liquid cooling system for a server includes a heat pipe and a displacement appendage fluidly coupled to the heat pipe. The displacement appendage includes a displacement element which is compressible under pressure.

In an air-cooled heat exchanger system, the stress in the pipe connecting the upstream main pipe of the upstream manifold and each heat exchanger is minimized by using a simple structure. The air-cooled heat exchanger system (1) comprises an upstream manifold (6) including a plurality of upstream branch pipes (18) extending therefrom, a heat exchanger (4) connected to the downstream end of each branch pipe, and including an inlet header (31) placed on a base frame in a moveable manner, an outlet header and a plurality of heat transfer tubes (34) connecting the two headers, and a connecting member (41, 75) connecting each adjacent pair of the inlet headers. The upstream manifold, the inlet headers and the connecting members have a similar thermal coefficient so that when the upstream manifold expands thermally, the corresponding thermal expansion of the inlet headers and the connecting members causes the inlet headers to move relative to the base frame by an amount corresponding to the thermal expansion of the upstream manifold.

A cooling device and a motor are provided. The cooling device that cools a heating element is provided with: a cooling chamber for cooling the heating element with a first cooling medium; a radiator chamber for releasing the heat of the first cooling medium to the outside; and a first connection path and a second connection path for connecting the cooling chamber and the radiator chamber. When part of the first cooling medium in the cooling chamber is gasified, at least part of the gasified first cooling medium moves into the first connection path, thus causing a circulation in which the first cooling medium in the cooling chamber flows into the radiator chamber via the first connection path, and the first cooling medium in the radiator chamber flows into the cooling chamber via the second connection path.

A liquid cooling system for a server includes a heat pipe and a displacement appendage fluidly coupled to the heat pipe. The displacement appendage includes a displacement element which is compressible under pressure.

Provided is a heat exchanger that is capable of avoiding a bridge phenomenon caused by water droplets between a plurality of flat tubes and is easily manufactured. The heat exchanger includes a plurality of plate-like fins arranged in parallel at intervals, the plurality of flat tubes inserted into the plurality of plate-like fins, and at least one water-guiding member arranged between adjacent ones of the plurality of flat tubes projecting from at least one of both outermost ones of the plurality of plate-like fins and having both end portions held in contact with projecting flat surfaces of the adjacent ones of the plurality of flat tubes.

An anti-freezing assembly includes: (a) heat exchanger for exchanging heat between a first fluid and a second fluid, the heat exchanger including: a first inlet manifold, a first outlet manifold, a second inlet manifold, and a second outlet manifold; a plurality of first flow passages, each of the plurality of first flow passages fluidly connecting the first inlet manifold to the first outlet manifold; a plurality of second flow passages, each of the plurality of second flow passages fluidly connecting the second inlet manifold to the second outlet manifold; a first porous metallic insert disposed in at least one of the plurality of second flow passages, a density of the first porous metallic insert varying in a direction of the second flow passages; wherein the first inlet manifold has a variable cross-sectional area; (b) a heater encompassing the first inlet manifold or the first outlet manifold.

A heat exchanger includes: stacked tubes through which a refrigerant flows; and a fin joined to the tube to increase a heat exchange area with air flowing around the tube. A cross-section of the fin perpendicular to a flow direction of the air is shaped in a wave shape that has: planar sections substantially parallel to the flow direction of the air; and a top for connecting between the adjacent planar sections. A clearance is defined in the planar section of the fin. When a portion of the fin where the shortest distance from a center line between the adjacent planar sections becomes the maximum is set as a furthest section in a cross-section perpendicular to a stacking direction of the tubes, the clearance is defined in one furthest section or at least one of a plurality of furthest sections.

An integrated pressure compensating heat exchanger and method of use are provided. The integrated pressure compensating heat exchanger includes an inlet configured to input an internal fluid; a first conductive bellows connected to the inlet, configured to accept the internal fluid from the inlet, configured to transfer heat between the internal fluid and an external fluid, and configured to compensate for a pressure by compressing in length; and an outlet configured to accept the internal fluid from the first conductive bellows and to output the internal fluid.

An evaporator includes multiple refrigerant tubes, multiple air passages provided between the refrigerant tubes, a cold storage container disposed in the multiple air passages, and a temperature detector. The evaporator further includes a freezing allowable region and a freezing unallowable region that is provided above the freezing allowable region. The cold storage container has a small thickness region and a large thickness region that is positioned above the small thickness region. The large thickness region demarcates a smaller space with the refrigerant tubes than the space demarcated between the small thickness region and the refrigerant tubes. The small thickness region of the cold storage container is positioned within the freezing allowable region, the large thickness region is positioned in the freezing unallowable region, and the temperature detector is disposed in the freezing allowable region.