The disclosed method relates to manufacturing a heat exchanger which causes no brazing defects, and a heat exchanger manufactured by the method. The method relates to manufacturing a heat exchanger having an aluminum alloy tube defining a cooling-medium flowing passage and a copper alloy tube defining a water flowing passage, wherein a heat exchange is carried out between a cooling medium flowing through the cooling-medium flowing passage and water flowing through the water flowing passage. The aluminum alloy tube and the copper alloy tube are brazed to each other at a temperature of less than 548° C.

A receiver includes a large diameter main body portion, and an intermediate member side small diameter portion. A wall thickness of the intermediate member side small diameter portion is smaller than a wall thickness of the main body portion. As a result, heat capacity of the intermediate member side small diameter portion is reduced. As a result, it is possible to complete brazing between the intermediate member side small diameter portion and the intermediate member, at the same time as brazing among tanks, tubes, and fins. A desiccant enclosed in a flexible bag can be taken in and out through the intermediate member side small diameter portion.

The purpose of the present invention is to provide an air guide-integrated evaporation cooler which allows a plurality of barrier plates, heat exchangers, and air guides for forming a dry channel and a wet channel to be integrally manufactured by a simple process, and a method of manufacturing the same. The air guide-integrated evaporation cooler for implementing the purpose includes a plurality of barrier plates; and gap units including a plurality of bars positioned between the plurality of barrier plates, disposed to be spaced apart from each other at a center portion thereof, and configured to form heat exchangers, and guides disposed at edges of the plurality of barrier plates and configured to determine a direction of a fluid flow.

Provided are a heat exchanger equipped with a cold reserving part and a manufacturing method thereof, equipped with a cold reserving part, in which since a cold reserving material charging part is formed at a portion at which an inlet and outlet member is formed, an additionally protruding part to inject the cold reserving material is not required, such that the heat exchanger may be miniaturized and may more rapidly and effectively absorb cold air to increase a cold reserving effect, and a manufacturing method of a heat exchanger equipped with a cold reserving part which forms the cold reserving material charging part to charge the cold reserving material after coating the heat exchanger to block a coating solution from introducing into the heat exchanger, thereby preventing the heat exchanger from corroding due to the coating solution to increase durability and more increase manufacturing performance.

A heat exchanger includes a main heat exchange unit including a plurality of first heat transfer pipes arranged side by side, a sub-heat exchange unit including a plurality of second heat transfer pipes arranged side by side, and a relay unit including a plurality of relay passages connecting the plurality of first heat transfer pipes and the plurality of second heat transfer pipes. Each of the plurality of relay passages has one inlet connected to a corresponding one of the plurality of second heat transfer pipes, and a plurality of outlets each connected to a corresponding one of the plurality of first heat transfer pipes. Each of the plurality of relay passages distributes refrigerant flowing from the one inlet, without merging streams of the refrigerant together, and causes the refrigerant to flow out of the plurality of outlets.

A brazed heat exchanger includes plates that are stacked or nested to define flow channels for multiple media. Inserts are arranged within at least some of the flow channels. Two different braze alloys having compositions based on different metals are used to form braze joints between the plates and the inserts. In some cases, a copper-based braze alloy is used for joints corresponding to flow channels for one of the media in order to provide high pressure-resisting strength to those flow channels, while an iron-based braze alloy is used for joints corresponding to flow channels for another of the media where dissolved copper is undesirable.

An apparatus for maintaining the temperature of an article at a temperature that is below the ambient air temperature includes an enclosure having an outer wall that defines an interior chamber for holding a volume of sealed air. An insert is disposed inside of the chamber and has a body that is made of a porous graphite foam material. A vacuum pump penetrates the outer wall and fluidly connects the sealed air in the interior chamber with the ambient air outside of the enclosure. The temperatures of the insert and article is maintained at temperatures that are below the ambient air temperature when a volume of a liquid is wicked into the pores of the porous insert and the vacuum pump is activated to reduce the pressure of a volume of sealed air within the interior chamber to a pressure that is below the vapor pressure of the liquid.

A plate laminated type heat exchanger includes: a plate laminated body which is formed by laminating a plurality of plates; and a heat exchanger body which includes a first header through which fluid (G) flows in from outside of the plate laminated body and a second header through which the fluid (G) flows out to the outside of the plate laminated body which are connected to the plate laminated body. Each of the plurality of plates is formed from a flat plate shape having a first surface and a second surface. The first surface is provided with a plurality of grooves defined by inner walls through which the fluid flows. The plurality of plates are connected each other so that the first surface of one of the plurality of plates is brazed to the second surface of the other one of the plurality of plates.

A brazed heat exchanger, for example a heat exchanger to be used in an air-conditioning system, preferably as a condenser, includes flat tubes extending between a pair of header tubes and fins arranged between the flat tubes. The components are produced from aluminum alloys, and are brazed together using an AlSi braze alloy. The aluminum alloys have a zinc content of no greater than 0.5% before brazing, and zinc from the aluminum alloys diffuses into the braze joints to result in braze joints having an average zinc content of no greater than 0.1%.

A microchannel heat exchanger is configured for use as an evaporator in a fluid cooling system and includes an inlet header, an outlet header, and a plurality of microchannel tubes extending between and in fluid communication with the inlet header and the outlet header. A microvalve actuated hybrid spool valve is attached to and in fluid communication with the inlet header.