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A spiral channel printed circuit board heat exchanger

A printed circuit board, spiral flow channel technology, applied in indirect heat exchangers, heat exchanger types, lighting and heating equipment, etc., can solve the problem of affecting the heat exchange effect, reducing the service life of the heat exchanger, and damaging the surface of the heat exchange plate. and other problems, to achieve the effect of improving the compactness of the equipment, suppressing the cavitation effect, and improving the service life

Active Publication Date: 2020-12-22
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The heat exchange plates of the traditional printed circuit board heat exchanger core are all in the form of straight channels. Although Z-shaped, wave-shaped, airfoil-shaped and other complex flow channel heat exchangers appeared later, their compactness and heat transfer The capacity can still be improved, and the recirculation zone is prone to appear at the corner of the complex flow channel, which affects the overall performance of the heat exchanger
Especially when PCHE works under high temperature and high pressure, cavitation phenomenon is easy to occur while countercurrent is generated, and cavitation corrosion will occur over time, which will damage the surface of the heat exchange plate, which not only affects its heat exchange effect, but also reduces the service life of the heat exchanger life
However, the heat exchange plates connected together by diffusion welding cannot be repaired, let alone replaced, and the cost is too high

Method used

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  • A spiral channel printed circuit board heat exchanger
  • A spiral channel printed circuit board heat exchanger
  • A spiral channel printed circuit board heat exchanger

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044]Embodiment 1. A spiral flow channel 4-5 in a spiral direction is provided on the surface of the heat exchange plate, and the direction of the arrow indicates the flow direction of the medium; the medium inlets of the spiral flow channels of adjacent heat exchange plates are staggered by 180°, so that the side The cold medium inlet and the hot medium inlet of the square housing 2 are staggered at an angle of 180°. The processing pit near the edge of the heat exchange plate is connected with the spiral channel as the medium inlet 4-4. The medium inlets of the spiral channels of adjacent heat exchange plates are staggered by 180°, so that the cold medium inlet and the hot medium inlet are staggered by 180°. The medium outflow channel 4-6 and the medium outflow port 4-7 are semicircular in shape respectively, and they are arranged symmetrically with respect to the center of the heat exchange plate, wherein the medium outflow port 4-7 is connected with the spiral flow channel...

Embodiment 2

[0045] Embodiment 2, the surface of the heat exchange plate has two helical flow channels in the spiral direction, which are the spiral flow channel of the heat medium and the spiral flow channel of the cold medium respectively. The heat medium and the cold medium flow on the surface of the same heat exchange plate, and the solid line arrow and The dotted arrows represent the flow directions of the hot medium and the cold medium respectively; two grooves are provided on the edge of the heat exchange plate 4-2 to connect with the two spiral flow channels as medium inlets, and their relative positions depend on the convenience of processing or installation or (not limited to 180°), this embodiment is illustrated by taking the angle arrangement of the inlets of the two medium spiral channels staggered by 180° as an example, so that the inlets of the cold medium and the inlets of the heat medium are staggered by an angle of 180°. The hot medium outflow port and the cold medium outf...

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Abstract

The invention discloses a spiral runner printing circuit heat exchanger which comprises an upper shell, a lateral shell and a lower shell. A heat exchanger core is arranged in a cavity formed by the upper shell, the lower shell and the lateral shell. The heat exchanger core is formed by diffusing and welding multiple layers of heat exchange plates. Each heat exchange plate is provided with a spiral runner for a working medium to act, a heat medium inlet is formed in the lateral shell and communicates with heat medium flowing-in openings in the heat exchange plates, and a cold medium inlet is formed in the lateral shell and communicates with cold medium flowing-in openings in the heat exchange plates. Each heat exchange plate is provided with a heat medium flowing-out opening and a cold medium flowing-out opening. After heat mediums and cold mediums conduct heat exchange through the corresponding spiral runners, the heat mediums and the cold mediums are output out of the upper shell andthe lower shell through the heat medium flowing-out openings and the cold medium flowing-out openings. The spiral runner printing circuit heat exchanger is compact in structure and small in occupiedsize, pressure changes can be in stable transition while the heat exchange effect is enhanced, the cavitation effect caused by a back flow area is avoided, and the service life of the heat exchanger is prolonged.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a spiral channel printed circuit board heat exchanger. Background technique [0002] In the 1980s, the University of Sydney in Australia invented the Printed Circuit Heat Exchanger (PCHE), and then the British Heatric Company produced products for the refrigeration and petrochemical industries. The heat exchange core of PCHE is composed of many heat exchange plates. The surface of each heat exchange plate is processed with chemical etching or laser corrosion process to form micro flow channels. The heat exchange plates are closely connected by diffusion welding technology. The performance of the welded seam after welding can reach the same standard as that of the base metal. The flow channel size of PCHE is millimeter-scale, which has a larger heat transfer area to volume ratio than traditional heat exchangers. Natesan et al. compared PCHE and shell-and-tube heat exchangers as intermediate he...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28D9/04
CPCF28D9/04
Inventor 严新平王建卢明剑孙玉伟吴芮
Owner WUHAN UNIV OF TECH