Dual-flow-path plate heat exchanger capable of changing flowing direction of heat exchange media twice

Abstract

The invention provides a dual-flow-path plate heat exchanger capable of changing the flowing direction of heat exchange media twice. The dual-flow-path plate heat exchanger comprises a plurality of heat exchange plates, and through holes allowing the heat exchange media to flow are formed in the heat exchange plates; sealing pads are mounted on the heat exchange plates, and a flow passage allowingthe heat exchange media to flow are formed between every two adjacent heat exchange plates through the corresponding sealing pad; three of the multiple heat exchange plates are semi-blind plates, andthe other heat exchange plates are all-pass plates; two of the three semi-blind plates are located on the two sides of the multiple all-pass plates correspondingly, and another semi-blind plate is located in the middle of the multiple all-pass plates; through holes allowing the heat exchange media to flow are formed in the positions, close to the four corners, of the multiple all-pass plates in an aligned mode correspondingly, and two through holes and two blind holes are formed in the positions, close to the four corners, on each semi-blind plate correspondingly; and the blind holes of the semi-blind plate located in the middle and the blind holes of the semi-blind plates located on the two sides are close to the edges of the two opposite sides of the semi-blind plates correspondingly, and thus flow passages which allow the heat exchange media to flow and are opposite in flowing direction are formed between semi-blind plate located in the middle and the semi-blind plates located on the two sides correspondingly.

Description

technical field [0001] The invention relates to the field of plate heat exchangers, in particular to a double-flow plate heat exchanger capable of secondary changing the flow direction of a heat exchange medium. Background technique [0002] The plate heat exchanger is composed of plates, sealing gaskets, fixed compression plates, movable compression plates, clamping bolts, upper and lower guide rods, pillars, etc. It has the advantages of high heat transfer coefficient, large logarithmic average temperature difference, small footprint, easy to change heat transfer area or process combination, light weight, low price, convenient production, easy cleaning, small heat loss, and not easy to scale. Widely used in refrigeration, HVAC, chemical industry, machinery industry, electric power industry, petroleum, medicine, seawater desalination and ships and other fields. [0003] At present, the common structure of the plate heat exchanger is a fixed compression plate, a movable com...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of inconvenient layout of heat exchange pipes and waste of space caused by existing plate heat exchangers, the present invention provides a double-flow plate heat exchanger capable of secondary changing the flow direction of heat exchange medium

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