219results about "Closure means" patented technology

An air-to-air heat exchanger, is provided that comprises a folded fin core formed from a continuous sheet of thermally conductive material that has been folded into alternating flat ridges and troughs; an insert overlay having an opening including two sets of uniform fingers, wherein each finger has a portion protruding into and essentially filling each trough on one surface of the folded fin core; an inset region between each finger portion and the end edges of each trough; a sealant within each inset region sealably attaching the insert overlay to the folded fin core; and an air flow divider plate. Heat exchanger components are also provided.

A bypass duct portion is provided in a casing of an EGR cooler so that heat distortion is absorbed, and the EGR cooler body and a valve case are brazed / fixed together so as to improve strength of the valve case, whereby, the bypass duct portion is formed between an inner surface of the casing and the core, a switch is provided for switching and guiding the exhaust gas to either of the core or the bypass duct portion, and a number of outer ribs formed in the circumferential direction respectively are arranged side by side while being separated from each other in the longitudinal direction in the bypass duct portion of the casing to form a heat stress absorbing portion. Also provided is a cylindrical valve case that is integrally formed by deep drawing of a thin metal plate by a press machine, a pair of slits are provided at the rear end of the valve case, both edges of an intra-valve partition plate are inserted into the slits, support projection portions are provided on both faces of the both edge portions of the intra-valve partition plate, and the edge of the slit is supported by the support projection portion. An opening of the valve case is integrally brazed / fixed to an opening of a header portion of the casing.

In a heat exchanger in which the number of parts is small, assembling is easy, bonded portions of each part are fewer and reliability of brazing is improved, a core body is constituted by turning up and bending a strip-shaped metal plate in a fanfold manner, and first flow passages and second flow passages are formed alternately in the thickness direction. Both ends of each of the first flow passages are blocked by each come tooth of a pair of comb-state members, and a fin is set within the second flow passages so as to constitute a core. And in the heat exchanger in which a cylindrical casing is fitted with the outer periphery of the core body, the comb-state member has its tooth base crossing perpendicularly with each of the comb tooth and a root of each comb tooth bent in the L-shape along the tooth base, the plane of the tooth base is brought into contact with a turned-up end edge, and each connection portion between the comb-state member and the core body is integrally brazed / fixed.

A heat pipe is provided having a vessel with a closed first end, a second end, and a wick on an inner surface that defines a passageway. A convex wall is positioned at the second end so as to block the passageway. The convex wall is deformable so as to move from a first position wherein a portion of the wall is convex to a second position wherein the portion of the wall is concave. The convex wall may include at least one stress concentrator so that upon an application of a force to the convex wall, the stress concentrator causes the convex wall to buckle. A method for forming a heat pipe is also provided comprising coating the interior surface of the vessel with a wicking material and partially saturating the wick with a working fluid. The vessel is then partially evacuated. A portion of the vessel is pinched-off so as to seal the vessel. Then, the pinched-off portion of the vessel is pressed so as to move it from a first position wherein the portion is convex to a second position wherein the portion is concave.

An evaporator includes a plurality of flat heat exchange tubes extending in a vertical direction and arranged at intervals along a left-right direction with a width direction thereof coinciding with a front-rear direction. The heat exchange tube has a plurality of refrigerant channels arranged along the width direction. The evaporator satisfies a relation 0.558<=A<=1.235, where A is a value in pieces / mm obtained by dividing the number N of the refrigerant channels of the heat exchange tube by a width W of the heat exchange tube as measured in the front-rear direction. Also, the evaporator satisfies a relation 0.35<=Dh<=1.0, where Dh is an equivalent diameter in mm of the heat exchange tube. This evaporator can reduce the temperature difference between air discharged into a compartment when a compressor is turned ON and that when the compressor is turned OFF.

An evaporator includes a refrigerant inlet header and a refrigerant outlet header arranged side by side in a front-rear direction, and a refrigerant circulating passage holding the headers in communication. The inlet and outlet headers are provided with caps forming refrigerant inlet and refrigerant outlet, the caps are joined to a pipe joint member having refrigerant inlet and outlet portions in communication with the refrigerant inlet and outlet, the caps or the pipe joint member is provided with a positioning lug which is projecting from its side edge toward the other one and which is fitted with a positioning recess formed in the other one, and the caps and the pipe joint member have flat surfaces to be contact with each other and are brazed such that the lug is engaged with the recess and that the flat surfaces are in contact with each other.

A heat exchanger for use as an evaporator includes a heat exchange core having a plurality of heat exchange tubes arranged in a left-right direction at a spacing, and a refrigerant turn tank as a lower tank disposed toward a lower end of the heat exchange core. The heat exchange tubes are inserted through respective tube insertion holes formed in the turn tank and joined to the tank. The turn tank has drain grooves each extending from a forwardly or rearwardly outer end of each of the tube insertion holes for discharging condensation water to below the turn tank therethrough. Each of the drain grooves has a bottom extending gradually downward as the bottom extends away from the tube insertion hole. the exchanger is used as the evaporator, the top surface of the turn tank can be drained of water with an improved efficiency.