Heat exchanger

Abstract

The present invention provides a heat exchanger, wherein a plurality of U-shaped heat-exchange tubes (2) are arranged along the tube thickness direction, the U-shaped heat-exchange tube has a pair of flat straight tube parts (21) in parallel in the width direction and a bending part (22) for communicating the pair of the straight tube parts (21). In the heat exchanger, the heat-exchange tube (2) is formed by bending two ends of a band-shaped flat tube component (20) angularly in an intermediate part which is used as the bending part (22), and the two ends of the flat tube component (20) is used as a pair of straight tube part (21). According to the heat exchanger of the invention, it is capable of reducing the component number and lightweighting.

Description

[0001] This application claims the priority of Japanese Patent Application No. 2008-60999 filed on March 11, 2008 and Japanese Patent Application No. 2008-126156 filed on May 13, 2008. The status forms part of this application. technical field [0002] The present invention relates to a heat exchanger used as, for example, an evaporator of a vehicle air conditioner or a room air conditioner, and related technologies. Background technique [0003] As an evaporator for a vehicle air conditioner or a room air conditioner, a stacked type evaporator in which a pair of disc-shaped plates are stacked together, or a heat exchange tube and a water tank (header) are mainly used. body, a header-type (tube-type) evaporator assembled by inserting a tube into a water tank, and the like. [0004] Among these evaporators, as header-type evaporators, for example, evaporators disclosed in the following Patent Documents 1 to 3 are known. [0005] In the evaporator disclosed in Patent Documen...

AI Technical Summary

Problems solved by technology

[0011] However, in the conventional evaporator shown in the aforementioned Patent Document 1, the headers not related to heat exchange are arranged on the upper and lower sides, so that space and parts need to be installed accordingly, and there is a problem of causing high weight and large size.

[0012] Furthermore, although the evaporator shown in Patent Document 2 has a structure in which the header pipes are arranged only on the upper end side, each flat tube needs to be provided with a cover-shaped connecting member on the lower end side, which increases the number of parts and may cause assembly problems. Reduced operating efficiency, etc.

[0013] On the other hand, since the evaporator shown in Patent Document 3 is an evaporator using U-shaped flat tubes (heat exchange tubes), it is only necessary to assemble the headers to the upper end side, and it is possible to reduce the number of parts and achieve a small size. lightweight

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