Heat exchanger and method of producing the same

Abstract

A heat exchanger which, while having excellent heat exchanging performance, has a structure easy to produce, is of low cost, and has high quality and reliability. The heat exchanger has first base plates (26), in each of which first slits (30) and second slits (40) are provided in substantially parallel to each other, and has second base plates (28), in each of which third slits (50) with substantially the same shape as a first slit (30) are provided. The length in the longitudinal direction of a second base plate (28) is set to be less than the length of a second slit (40). The first base plates (26) and the second base plates (28) are layered over each other such that the first slits (30) provided in the first base plates (26) and the third slits (50) provided in the second base plates (28) are communicated. Flow paths (60) outside tubes are constructed by the first slits (30) provided in the first base plates (26) and the third base plates (50) provided in the second base plates (28). Flow paths (70) inside the tubes are constructed by the second slits (40) provided in the first base plates (26) and the second base plates (28). Since a heat exchanging section formed only by tubes can be constructed by the base plates with the slits, the heat exchanger can be easily produced. Further, the heat exchanger can be provided at low cost.

Description

technical field [0001] The present invention relates to heat exchangers for cooling systems, cooling systems and heating systems, and more particularly to liquid and gas heat exchangers used in systems requiring compactness such as information equipment. Background technique [0002] In the prior art, such heat exchangers generally consist of tubes and fins. In recent years, in order to achieve this compactness, there is a tendency to reduce the tube diameter and tube pitch, and to increase the density of tubes. For example, there are cases where the heat exchange part is constituted by a very small tube having a tube outer diameter of 0.5 mm. [0003] Figure 27 It is a front view of a conventional heat exchanger disclosed in JP-A-2001-116481. like Figure 27 As shown, in the conventional heat exchanger, the inlet box 31 and the outlet box 32 are arranged facing each other with a predetermined interval therebetween. Between the inlet box 31 and the outlet box 32 , a plur...

AI Technical Summary

Problems solved by technology

However, a precision machining device must be prepared in order to manufacture thin round tubes. Therefore, not only does the heat exchanger become expensive, but also the inlet box 31 and the outlet box 32 must be provided with the tubes 33 at a predetermined fine pitch. fine round holes, so that it is difficult to insert the pipe 33 into the inlet box 31 and the outlet box 32 for connection.

Therefore, even though the heat exchange performance of such a heat exchanger is high, its extremely high price and the fact that there is not sufficient reliability against fluid leakage during use have become existing problems.

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