Microchannel for compact heat exchanger and atomic diffusion bonding manufacturing method thereof

Abstract

The invention discloses a compact heat exchanger micro-channel and a manufacture method thereof. The micro-channel is formed by the mutual superposition of a plurality of elementary layers, which are sequentially a refrigeration working substance layer, a baffle layer, a working fluid layer and a baffle layer. The elementary layers are put in a cavity under vacuum state for heating and pressurizing after superposition, and finally, due to atomic diffusion happening on metal surfaces, the elementary layers are mutually combined as a whole the same as a metal fine structure, and the diameter of the micro-channel and the thickness range of the interlayer are both micron level. The invention is characterized by no thermal resistance caused by welding, random design of hydraulics diameter of a micro-channel and the heat transfer area in unit volume more than 700, and the like. The manufactured micro-channel heat exchanger can be used as a heat pump water heater, a heat pump boiler and a condenser, a gas cooler or an evaporator used in a geothermal heat pump, thus greatly improving the heat exchange capacity of the heat exchanger in unit volume, saving the using materials of the heat exchanger, and further reducing the volume and weight of the heat pump water heater, the heat pump boiler and the geothermal heat pump.

Description

Technical field: [0001] The invention relates to a manufacturing method of a compact micro-channel heat exchanger, in particular to manufacturing a compact micro-channel for use in heat pump water heaters, heat pump boilers and geothermal heat pumps, gas coolers or evaporators using diffusion bonding technology A heat exchanger belongs to the technical field of production. Background technique: [0002] Heat pump water heaters, heat pump boilers and heat exchangers used in geothermal heat pumps are currently made of copper tubes (casing type, external winding type, inlaid type, etc.). Heat exchangers made of copper tubes have problems such as large volume, large amount of copper tubes used, and small heat exchange area per unit volume, which directly result in large resource consumption, low utilization of building area and space, and the use of refrigeration equipment. Quality and other issues. In order to solve the problems caused by heat exchangers made of copper tubes,...

AI Technical Summary

Problems solved by technology

There is obviously thermal resistance between the plate bundles that constitute the microchannel heat exchanger due to brazing

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