Sheet for heat exchanger

Abstract

The invention discloses a sheet for a heat exchanger and belongs to the technical field of heat exchange devices. The sheet is mainly composed of a base body and heat exchange flow channels machined in the base body through chemical etching, wherein each heat exchange flow channel is divided into a flow distributing channel, a converging channel and curved channels. The flow distributing channels are communicated with the converging channels through the curved channels, the free ends of the flow distributing channels are medium inlets, and the free ends of the converging channels are medium outlets. According to the sheet, the mode that the pair of converging channel and flow distributing channel correspond to multiple curved channels of each heat exchange flow channel is adopted, the heat exchange efficiency at an inlet and an outlet of the heat exchanger is enhanced, and the problem that the heat exchange efficiency is lowered due to increasing of the hydraulic radiuses of the flow channels of the heat exchanger is solved.

Description

technical field [0001] The invention relates to a plate used for a heat exchanger, in particular to a microchannel heat exchanger plate used in the oil and gas production industry, and belongs to the technical field of heat exchange devices. Background technique [0002] At present, the plates of micro-channel heat exchangers used in air-energy air conditioners and air-energy water heaters are mostly made of aluminum alloy, which restricts the increase in the design pressure of micro-channel heat exchangers, and some micro-channel heat exchangers of copper alloy and stainless steel are used. In most heat exchangers, the inlet and outlet pipelines of the working fluid are processed on the plate, which restricts the layout of the inlet and outlet of the heat exchanger. For example, in the plate used for the microchannel heat exchanger mentioned in the patent publication number CN102494547A, the inlet and outlet pipelines are processed on the plate, so that the inlet and outlet...

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Problems solved by technology

[0003] 1) The cross-section of the micro-flow channel on the plate is rectangular, which makes the plate have the possibility of stress concentration;

[0004] 2) The thickness of the plate is too small, the corrosion allowance is insufficient, the service life is limited, and the requirements for working fluid are relatively strict;

[0005] 3) The hydraulic diameter of the plate is too small, which is not suitable for most industrial applications where the working fluid is a suspension

[0006] 4) The flow area of ​​the inlet and outlet is too large, which reduces the enhanced heat transfer effect of the inlet and outlet sections

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