Micro-path parallel current heat-exchanger for transcritical Co2 circulation and mfg. method

A technology of parallel flow heat exchanger and manufacturing method, applied in the direction of heat exchanger type, indirect heat exchanger, lighting and heating equipment, etc., can solve the problem that welding quality is not easy to control, the yield of heat exchanger is reduced, and the temperature is uneven and other problems, to achieve the effect of easy control of welding quality, improved yield and enhanced strength
CN1710367AActive Publication Date: 2005-12-21TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2005-12-21

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Abstract

A method for preparing microchannel and parallel flow exchanger for transcritical CO2 circulation includes extrusion - moulding collector tube in multi-tube structure and heat exchanging flat tube separately to let one side of multi-tube collector tube be planar structure, making parallel slots for heat exchanging flat tubes on planar side of multi-tube collector tube, using weld flux to cover the part of the flat tube to be welded and applying vacuum one - body brass soldering for finishing .
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Description

technical field

[0001] The present invention relates to a method for CO 2 The invention relates to a micro-channel parallel flow heat exchanger in a transcritical vapor compression refrigeration and heat pump device as a working medium, and specifically relates to a gas cooler or an evaporator used in a refrigeration and heat pump device. Background technique

[0002] in CO 2 Among the heat exchangers used in transcritical cycle refrigeration and heat pump devices, one of the heat exchangers works on the high-pressure side of the system, and supercritical CO 2 The heat is released and cooled in the tube of the heat exchanger, and the pressure can reach above 10MPa. The ambient air heats up through the fins outside the tube. This heat exchanger is called a gas cooler; the other heat exchanger works on the low-pressure side of the system. Subcritical CO 2 The heat is absorbed and evaporated in the heat exchanger tube, the pressure is about 4MPa, and the heat is exchanged wi...

Claims

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