A plate heat exchanger with heating and cooling functions

Abstract

The invention discloses a plate-type heat exchanger with heating and refrigerating functions. The plate-type heat exchanger comprises an upper cover plate, first fluid flowing channels, second fluid flowing channels, thermoelectric modules, a lower cover plate and an installing and fastening structure; the upper working face and the lower working face of each thermoelectric module are provided with the corresponding first fluid flowing channel and the corresponding second fluid flowing channel respectively; the upper cover plate is arranged on the uppermost first fluid flowing channel, and the lower cover plate is arranged under the lowermost second fluid flowing channel; all the parts are connected into an integral structure through first fastening holes formed in the upper cover plate, first flowing channel fastening holes, thermoelectric module fastening holes, heat exchanger fastening holes, second flowing channel fastening holes and second fastening holes formed in the lower cover plate. According to the plate-type heat exchanger with the heating and refrigerating functions, two kinds of fluids can be heated and refrigerated at the appropriate temperature; the advantages that the structure is compact and simple, the efficiency is high, the thermoelectric modules are free of moving parts and free from wear, the life is long, and temperature control is precise are achieved; the main parts can be obtained through punch forming, related thermoelectric units do not need to be customized, the production cost is low, and the large-scale application requirements are met.

Description

technical field [0001] The invention relates to the technical field of thermoelectricity, and relates to the plate heat exchanger technology, in particular, a plate heat exchanger with heating and cooling functions. Background technique [0002] Plate heat exchangers have the advantages of compact structure, small volume, small consumables, low cost and high heat transfer efficiency, so they are widely used in chemical industry, electric power, metallurgy, automobile manufacturing, power machinery, food processing, HVAC and other industries . In the plate heat exchanger, the heat exchange channel plate is its core structural part, and the heat exchange between the two fluids is mainly carried out by the heat exchange channel plate. Therefore, improving the plate structure of the heat exchange channel: improving the heat exchange channel, increasing the degree of fluid turbulence, and strengthening heat exchange can improve and enhance the heat exchange performance of the pl...

AI Technical Summary

Problems solved by technology

This creates the problem of co-existing cooling and heating in one system - electric vehicle power battery system

At present, there is no better product that can meet the needs of cooling and heating functions at the same time.

[0005] Chinese patent CN101825409B discloses "a plate heat exchanger with a power generation structure", but its shortcomings are: (1) Although a thermoelectric module is used, the problem of its thermoelectric module placement and installation and sealing has not been effectively solved; (2) The thermoelectric unit is directly welded on the upper and lower flow channels, which has extremely high requirements on the thermoelectric material and welding interface; (3) The thermoelectric unit and module need to be customized, which is costly and not conducive to large-scale application; (4) It is only for traditional plate heat exchangers. Partial improvement; (5) The temperature difference between the two fluids is small, and the power generation efficiency is extremely limited

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