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Double-row microchannel header pipe and using method thereof

A technology of micro-channels and headers, which is applied in the direction of tubular elements, fixed conduit components, lighting and heating equipment, etc., can solve the problems of large refrigerant charge, poor distribution effect, and difficult design, so as to improve heat transfer performance, The effect of reducing resistance and increasing effective channels

Pending Publication Date: 2019-11-19
江苏科菱库精工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Double-row micro-channel heat exchangers are used, four headers are required, the cost is high, and the refrigerant charge is large
After the front header to the rear header, there will be a secondary distribution problem. The distribution effect is poor and it is very difficult to design. The commonly used pressure drop distribution method can optimize the distribution, but with the pressure drop, the heat transfer of the front row is sacrificed. performance
In addition, connecting pipes are required between the front headers and the rear headers, and the cost is high

Method used

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  • Double-row microchannel header pipe and using method thereof
  • Double-row microchannel header pipe and using method thereof
  • Double-row microchannel header pipe and using method thereof

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Embodiment Construction

[0022] Such as figure 1 As shown, a double-row microchannel header of the present invention includes a core part 1, and a first side plate 2 and a second side plate 3 respectively fixed on both sides of the core part 1; the core part 1 For flat tube interfaces and flat tube channels evenly distributed on the top, the cross-sectional area of ​​the flat tube channels 12 is 1.25 to 3.75 times the cross-sectional area of ​​the flat tube interface 11, preferably 2 times in this embodiment. The cross-section of the flat tube channel is circular or rectangular, and if rectangular is used, rectangular is preferred.

[0023] Such as figure 1 with figure 2 As shown, the flat tube interface 11: includes a front flat tube interface 11A and a rear flat tube interface 11B, which are respectively used to connect the front flat tube and the rear flat tube; flat tube channel 12: used for communicating the front flat tube and the rear flat tube. The distance between the ends of the front fl...

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Abstract

The invention relates to the technical field of microchannel heat exchangers, in particular to a double-row microchannel header pipe. The double-row microchannel header pipe comprises a core portion,and a first side plate and a second side plate respectively fixed on both sides of the core portion, wherein flat pipe interfaces and flat pipe passages are evenly distributed on the core portion, andeach flat pipe interface comprises a front flat pipe interface and a rear flat pipe interface, which are respectively in abutting joint with a front flat pipe and a rear flat pipe; and the flat pipepassages are used for communicating the front flat pipe and the rear flat pipe. After adopting the structure and method, the double-row microchannel header pipe reduces the flow resistance of a refrigerant and increases the effective passage; and compared with a pressure drop distribution mode in the prior art, the double-row microchannel header pipe optimizes the distribution mode and improves the front-row heat exchange performance.

Description

technical field [0001] The invention relates to the technical field of microchannel heat exchangers, in particular to a double-row microchannel header and a method for using the same. Background technique [0002] The micro-channel heat exchanger adopts flat tubes, the inner channel hydraulic diameter is small, the boundary layer is small, the heat transfer coefficient in the tube is high, the speed of the air is uniform in the direction of travel, and the heat transfer coefficient of the air on the fin side is high. It is welded and has no expansion joints. Thermal resistance; due to such characteristics, microchannel heat exchangers are often used in occasions that improve energy efficiency, reduce weight, compact structure, and reduce refrigerant charge, and are the development direction of air-side heat exchangers. Existing microchannel heat exchangers include headers, inlet and outlet tubes, and fins. The headers are round tubes. The diameter of the headers is 3 to 5 mm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F9/02F28D1/053F28F1/02
CPCF28F9/02F28D1/05366F28F1/022
Inventor 赵永峰薛炎
Owner 江苏科菱库精工科技有限公司
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