A liquid to refrigerant heat exchanger includes a coolant volume that is at least partially defined by a plastic housing and by a metal closure plate. The plastic housing is sealingly joined to the closure plate along an outer periphery of the closure plate. The metal closure plate can be part of a brazed assembly that defines a continuous refrigerant flow path through the heat exchanger between a refrigerant inlet port and a refrigerant outlet port.

The present application relates to a stencil device (150) for simultaneous stencil printing of brazing material onto elevations, areas surrounding port openings, and a circumferential skirt (210) of a heat exchanger plate (200) wherein the stencil device (150) comprises an upper stencil having openings for applying brazing material to elevations and areas surrounding port openings of the heat exchanger plate (200) and a lower stencil printing stencil (150) having a large opening (190) for receiving the heat exchanger plate (200) and contacting an outer perimeter of the circumferential skirt (210) of the heat exchanger plate (200), wherein an inner surface (195) of the large opening (190) comprises brazing material exits (160) for applying brazing material to the circumferential skirts (195). Disclosed is also a method of such stencil printing and also the use of a stencil device for applying heat exchanger plates (200) with a brazing material.

A heat exchanger includes a tube expansion portion formed by expanding a heat transfer tube so that an outer peripheral surface of the heat transfer tube is pressed against an inner peripheral surface of a hole provided in a side wall portion of a case. The tube expansion portion includes first and second bulge portions positioned respectively on the inside and the outside of the side wall portion so as to sandwich the side wall portion in an axial length direction of the heat transfer tube and configured such that respective outer peripheral surfaces thereof partially bulge outward in a radial direction of the heat transfer tube, an end portion tip end of the heat transfer tube is positioned apart from the second bulge portion, and the end portion tip end and a part in the vicinity thereof are expanded so as to be included in a part of the tube expansion portion. Thus, effects such as improving the precision with which the side wall portion of the case, the heat transfer tube, and a connecting tube are fitted to each other can be achieved, and as a result, the respective parts can be brazed easily and appropriately.

A heat exchanger includes tube expansion portions provided respectively on a plurality of heat transfer tubes such that outer peripheral surfaces of the heat transfer tubes are respectively pressed against inner peripheral surfaces of a plurality of first holes provided in a side wall portion of a case, and a plurality of first concave surface portions provided in an outer surface of the tube expansion portion so that first gaps, into which brazing material of a first brazed portion advances, are formed between the outer surface of the tube expansion portion and the inner peripheral surface of the first hole. At least one of the plurality of first concave surface portions is positioned in an outside peripheral surface portion of the outer peripheral surface of the heat transfer tube. According to this configuration, the strength with which the heat transfer tubes are attached to the case can be increased while simplifying a manufacturing operation and reducing the manufacturing cost.

A plate type heat exchanger includes a plate package in which a plurality of heat exchange plates is stacked to form a flow path, through which fluid flows, an end plate coupled to an outside of the plate package, and a socket connected to the plate package by passing through the end plate. The end plate includes a base which is in contact with the outside of the plate package, a socket hole which is formed through the base and into which the socket is inserted, and a ridge that protrudes outward from an edge of the socket hole of the base.

A heat exchanger brazing fixture including a baseplate including a first surface and a second surface located opposite the first surface and a first post including a first end and a second end located opposite the first end. The first post is operably associated with the first surface of the baseplate at the first end. The A heat exchanger brazing fixture further including a top plate operably connected to the first post and separated from the first surface of the baseplate by a selected distance. The top plate being configured to move in a first direction along the first post when a heat exchanger resting upon the first surface of the baseplate expands during a brazing process.

A heat exchanger is configured to exchange heat between a heat medium and an air. The heat exchanger includes a tube through which the heat medium flows therein, and a fin that is formed by bending a metal plate and that is brazed to a surface of the tube. The fin includes a louver. The surface of the tube defines an introducing groove configured to introduce a brazing material melted at brazing from a connecting portion between the tube and the fin to an other portion.

A method for brazing a plate heat exchanger (10) having a stack of heat exchanger plates with depressions and elevations forming interplate flow channels and port openings being in selective fluid communication with said interplate flow channels, the method comprising the steps of placing the stack of heat exchanger plates in a heating chamber (16) of a furnace (15), conducting a gas for changing the temperature of the stack of heat exchanger plates through a plurality of nozzles (23) inside the heating chamber (16), and conducting gas from at least one of said nozzles (23) into at least one of the port openings (O1-O4) of the stack of heat exchanger plates. Disclosed is also a system for brazing a plate heat exchanger (10).

A heat exchanger module comprises several U-tubes for a first fluid flow, the U-tubes having two straight sections connected by a U-shaped portion. Inlet ends of the several U-tubes are connected with an inlet collector tube and outlet ends of the several U-tubes are connected with an outlet collector tube. The two straight sections of the U-tubes have a different length such that a longitudinal axis of the inlet collector tube and a longitudinal axis of the outlet collector tube are arranged at different heights with respect to a height of the heat exchanger module. Also provided is a method for manufacturing the heat exchanger modules and a tubular heat exchanger comprising a plurality of heat exchanger modules.

This disclosure relates to a method for fabricating a vapor chamber. The method includes positioning a capillary structure on a first cover, forming an accommodation space, a flow channel, and a plurality of posts on a first surface of a second cover, covering the first cover with the second cover, positioning the first cover and the second cover such that the plurality of posts are spaced apart from the capillary structure by a distance, and pressure welding the first cover and the second cover so as to form a chamber between the first cover and second cover and a passage connected to the chamber and to pressure weld the plurality of posts with the capillary structure.