Plate cavity-type heat exchanger

Abstract

The invention relates to a plate cavity-type heat exchanger which is provided with a plurality of heat exchange units clamped between two pressure plates (1); each heat exchange unit is respectively provided with two opposite wave plates (3) with wavy cross section; bifarius surfaces of the two wave plates are respectively opposite to water plates (2) on the corresponding sides; the water plates are provided with a plurality of horizontal water plate wave troughs (21) which are vertical to longitudinal wave plate wave troughs (31) on plane surfaces opposite to the wave plates, and a plurality of longitudinal pressure bearing strips (22); all the pressure bearing strips respectively correspond to the trough parts of the wave plate wave troughs; a cavity frame (4) is arranged between the two water plates; the front side and the rear side of the side frame of the cavity frame are respectively inlaid in the water plates (2, 6) on the corresponding sides, and respectively seal and press the periphery of the wave plate (3) on the corresponding side to the corresponding water plate through the side frame; and the invention can improve the pressure bearing capability of the heat exchanger and reduce the pressure bearing requirement on the heat exchange wave plates, the size of the working substance cavity can be designed on demand, and the problems that impurities block a runner and the like can be overcome by enlarging the cross section of the heat carrying runner.

Description

technical field [0001] The invention belongs to a heat exchange device, in particular to a plate cavity type phase change heat exchange device. Background technique [0002] In heat exchange devices, the most common are tube heat exchangers and plate heat exchangers. The main structure of plate heat exchangers is: in order to increase the heat exchange area, a heat exchange plate with a corrugated cross section (the described The waveform can be corrugated, triangular or rectangular, etc.), on both sides of the corrugated heat exchange plate, there are respectively a working medium fluid chamber and a heat transfer fluid chamber, and the working fluid and heat transfer fluid chambers of different temperatures flow through the chambers on both sides. Fluid, heat exchange is realized through the corrugated heat exchange plate. Due to the large heat exchange area of ​​the plate heat exchanger, its heat exchange efficiency is also higher than that of the tube heat exchanger, but...

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Problems solved by technology

[0002] In heat exchange devices, the most common are tube heat exchangers and plate heat exchangers. The main structure of plate heat exchangers is: in order to increase the heat exchange area, a heat exchange plate with a corrugated cross section (the described The waveform can be corrugated, triangular or rectangular, etc.), on both sides of the corrugated heat exchange plate, there are respectively a working medium fluid chamber and a heat transfer fluid chamber, and the working fluid and heat transfer fluid chambers of different temperatures flow through the chambers on both sides. Fluid, heat exchange is realized through the corrugated heat exchange plate. Due to the large heat exchange area of ​​the plate heat exchanger, its heat exchange efficiency is also higher than that of the tube heat exchanger, but because the working medium fluid chamber of the heat exchanger has to withstand higher Therefore, for plate heat exchangers, there is also the problem that it is difficult to meet higher pressure bearing requirements. In order to improve the pressure bearing capacity of heat exchangers, most of the existing plate heat exchangers are designed from the pressure bearing performance of materials. Start: The heat exchange wave plates that make up the working medium cavity are made of materials with good pressure bearing performance, and some materials with high pressure bearing capacity, such as stainless steel, have good pressure bearing performance, but the thermal conductivity is not very high, especially the existing plate type The multi-point contact pressure-bearing structure between the wave plates used in the heat exchanger limits the flow space of the working medium fluid chamber and the flow rate of the heat carrier

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