Plate type heat exchanger and method of manufacturing heat exchanger

Abstract

A plate type heat exchanger, wherein a plurality of plates in which flow paths passing through the plate surfaces are formed are disposed between a pair of end plates, a plurality of flow paths not communicating with each other are provided in the plane of the same or different plates among the plurality of plates, and fluids flowing through the plurality of flow paths are so designed as to flow opposedly to each other, whereby an increased performance and reduced size of the plate type heat exchanger can be provided because a plurality of fluids performs heat exchange in the form of a counter flow having high heat transfer characteristics.

Description

technical field [0001] The present invention relates to a flat plate heat exchanger for heat exchange of a liquid as a fluid and a gas-liquid two-phase fluid accompanied by a phase change. Background technique [0002] The plate heat exchanger generally forms a closed flow channel between stacked metal plates, and performs heat exchange on the fluid flowing in the flow channel. This heat exchanger has a larger surface area per unit volume, is more compact, and consumes less material, so it is used to replace the original shell-and-tube heat exchanger. In a general plate heat exchanger, gaskets are used to seal the outer circumference of the plates and the head (ヘツダ—) holes, and each plate is mechanically fixed. The advantage of this heat exchanger is that it can be decomposed and cleaned, but its disadvantage is that the temperature and pressure range of the fluid used is limited. [0003] Aiming at this general flat heat exchanger, Japanese Patent Laid-Open No. 63-137793 ...

AI Technical Summary

Problems solved by technology

When the plates are stacked, if the burrs contact each other, the adhesion between the plates will be greatly damaged, which will easily lead to poor brazing

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