A parallel flow heat exchanger

Abstract

The invention relates to a parallel flow heat exchanger with a novel structure. Left and right separators are arranged in left and right collecting pipes to divide the left and right collecting pipes into left and right collecting pipe upper cavities and left and right collecting pipe lower cavities. The right collecting pipe upper cavity is communicated with the right collecting pipe lower cavity by a through hole in the right separator, wherein the heights of the left collecting pipe upper and lower cavities are respectively equal to those of the right collecting pipe upper and lower cavities; the heights of the left and right collecting pipe upper cavities are greater than those of the left and right collecting pipe lower cavities; the right collecting pipe is also provided with a U-shaped communicating pipe; a pipe orifice of a vertical pipe at one side of the communicating pipe is sealed, the vertical pipe at one side of the communicating pipe extends into the right collecting pipe upper cavity from the upper end port of the right collecting pipe, and the pipe wall of the vertical pipe at one side of the communicating pipe is provided with a plurality of openings; a pipe orifice of a vertical pipe at the other side of the communicating pipe is open and the vertical pipe at the other side of the communicating pipe extends to pass through the pipe wall of the right collecting pipe to enter the right collecting pipe lower cavity. According to the invention, liquidity of a working medium is improved; heat exchange efficiency of the working medium is greatly improved; a structure and a production process of the collecting pipe are simplified; the requirement on the production technology is reduced; the rejection rate is reduced; the production cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of parallel flow heat exchangers, in particular to a parallel flow heat exchanger. Background technique [0002] Parallel flow heat exchanger is a device that realizes heat transfer between hot and cold fluids, and is widely used in HVAC and other fields. Parallel flow heat exchangers generally include two headers parallel to each other, a number of substantially parallel flat tubes for heat dissipation are arranged between the two headers, and fins for heat dissipation are brazed between adjacent flat tubes. When working, the medium flows along the flat tubes between the headers in the design direction, and exchanges heat with the air blowing through the fins while flowing. In order to improve the heat exchange efficiency, the medium must be evenly distributed and flow through each cooling flat tube, which requires improvement in the structure of the header. The applicant's patent "parallel flow heat exch...

AI Technical Summary

Problems solved by technology

These improved structures can play the role of evenly distributing the medium, but the structure is still very complicated, the fluidity of the medium is not good, which affects the heat exchange efficiency of the working fluid, and the header also has high requirements for production technology, and it is easy to produce waste products , making it difficult to reduce production costs, which is not conducive to the promotion and application of products

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