A vacuum plate heat exchanger

Abstract

The present application relates to the field of heat exchange, and discloses a vacuum plate heat exchanger, which comprises an upper heat exchange box and a lower heat exchange box, the lower heat exchange box is internally provided with a lower heat exchange cavity and a plurality of groups of heat exchange plates which are arranged in the lower heat exchange cavity at intervals, a flue gas channel is formed between two adjacent groups of heat exchange plates, a plurality of first flow cavities are arranged in the heat exchange plates, the upper heat exchange box is internally provided with an upper heat exchange cavity and heat exchange pipes arranged in the upper heat exchange cavity, a fluid to be exchanged is arranged in the heat exchange pipes, a phase change fluid is arranged in the first flow cavities and the upper heat exchange cavity, the phase change fluid exchanges heat with the fluid to be exchanged in the heat exchange pipes through the heat exchange pipes, the heat exchange plates are provided with first openings which are in communication with the first flow cavities, the upper heat exchange box is provided with second openings which are in communication with the upper heat exchange cavity, a sheet is welded to the upper heat exchange box, and the first openings are in communication with corresponding second openings. The vacuum plate heat exchanger greatly reduces the welding points between the heat exchange plates and the heat exchange pipes, is convenient to assemble, is beneficial to improving the welding quality, and reduces the risk of leakage of the heat exchange fluid.

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