Miniature micro-channel plate-fin heat exchanger

Abstract

The invention relates to a miniature heat exchanger with a plate-fin micro-channel structure, wherein the miniature heat exchanger can act as a novel sensible heat exchanger or a phase change heat exchanger which is compact in structure, small in volume, high in heat exchange efficiency and high in heat exchange density. According to the embodiment of the invention, the heat exchanger is composed of a plurality of layers of metal thin sheets; one surface of each layer of thin sheet is provided with a micro-channel structure through an etching method, and the other surface of each layer of thin sheet is of a plane structure; and the plane side of one metal thin sheet and the micro-channel side of another metal thin sheet are overlapped and pressed together, thus the plate-fin micro-channel structure is formed. According to the heat exchange quantity requirement, multiple layers of thin sheets are laminated, and molecular-level combination among metal layers can be formed through a vacuum diffusion welding method, thus all the thin sheets are connected into a whole, and a complete heat exchanger is formed. According to the invention, the miniaturization difficulties of the heat exchanger and a refrigerator device can be solved.

Description

technical field [0001] The invention relates to a miniature heat exchanger with a microchannel structure, which can be used, for example, as an evaporator in a miniature vapor compression cycle chiller, and can also be used in a miniature liquid-liquid type heat exchanger. Background technique [0002] Micro heat exchanger is a kind of special heat exchanger widely used, for example, it can be used for heat dissipation of electronic equipment and micro chiller. The chiller is a kind of refrigeration device with a very wide range of uses. It is mainly used to produce cold water, and the cold water can be used as a cooling device for air conditioning, equipment heat dissipation, mold temperature control, electronic component cooling, human body cooling, and sub-low temperature treatment. source used. The micro chiller can work on the principle of vapor compression refrigeration. It is mainly composed of compressor, condenser, throttling element, evaporator and other component...

AI Technical Summary

Problems solved by technology

Although the nickel brazed plate evaporator does not produce copper ions in water, its compressive strength is lower than 1MPa. If the pressure of the refrigeration system is higher than 1MPa, it will easily cause refrigerant leakage. In fact, the pressure of the general refrigeration system is often It is greater than 1MPa, so the application of nickel brazed plate evaporator is also limited

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