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Fins for heat exchanger and heat exchanger using same

A heat exchanger and fin technology, applied in the field of heat exchangers, can solve the problems of reduced air volume, increased wind resistance, inability to give full play to the heat transfer performance of micro-channel heat exchangers, etc., and achieve the effect of reducing air volume

Active Publication Date: 2010-09-29
SANHUA(HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the wind resistance on the windward side increases, the air volume decreases, and the heat transfer performance of the heat exchanger decreases.
In this way, the heat transfer performance of the microchannel heat exchanger cannot be fully utilized.

Method used

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  • Fins for heat exchanger and heat exchanger using same
  • Fins for heat exchanger and heat exchanger using same
  • Fins for heat exchanger and heat exchanger using same

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0032] see first figure 2 , which illustrates the structure of the shutter according to the first embodiment of the present invention. Considering the fact that the amount of frost on each part of the louver gradually decreases along the direction of air flow when the outdoor ambient temperature is low, the fins according to the first embodiment of the present invention adopt the following solutions.

[0033] The fenestration pitch between adjacent slats of the louver gradually decreases along the direction of air flow, and the fenestration angle of the louver remains unchanged, so that the fenestration d of the louver gradually decreases along the direction of air flow, that is, d1> d2>d3>d4>d5>d6>d7>d8, such as figure 2 as indicated. With such a structure, the window spacing at different parts of the louver is adapted to the amount of frosting at the corresponding part: the part located upstream relative to the air flow direction has more frost, and correspondingly the a...

no. 2 example

[0036] image 3 A fin according to a second embodiment of the invention is illustrated. In view of the fact that the amount of frost on each part of the louver gradually decreases along the direction of air flow, the fins according to the second embodiment of the present invention adopt the following solutions.

[0037] A first pitch is used between adjacent slats on the windward side of the louver, and a second pitch smaller than the first pitch is used between the slats on the leeward side of the louver, and by making each sash of the louver The fenestration angles of the louvers are kept the same, so that the windward part of the louver has a uniform first fenestration distance D1, and the leeward side part of the louver has a uniform second fenestration distance D2, and the first fenestration distance D1 is greater than the second fenestration distance D2, such as image 3 shown. With such a structure, the window spacing between the windward side and the leeward side of...

no. 3 example

[0041] Figure 4 A fin according to a third embodiment of the invention is illustrated. In view of the fact that the amount of frosting at each part of the louver gradually decreases along the direction of air flow, the fins according to the third embodiment of the present invention adopt the following solutions.

[0042] Make the opening angle α of each window of the louver gradually decrease along the direction of air flow, that is, α1>α2>α3>α4>α5>α6>α7>α8, and the pitch between adjacent louvers of the louver remains the same , so that the fenestration distance between the adjacent slats of the louvers gradually decreases, such as Figure 4 shown. With such a structure, the opening distance of adjacent windows at different parts of the louver is adapted to the amount of frosting at the corresponding parts: the part at the front relative to the direction of air flow has more frosting, correspondingly The fenestration angle of the fenestration at this position is relatively...

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PUM

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Abstract

The invention discloses fins for a heat exchanger. A louver is formed on the fin. When the heat exchanger works, air serving as a heat exchange working medium sequentially flows by each window fin of the louver. The window space of the louver changes along the flow direction of the air, so that the window spaces on different parts of the louver are matched with the frosting amount on corresponding parts. By using the technical scheme of the invention, the window space on a part of the louver is matched with the frosting amount on a corresponding part, so that a sufficient space is remained between adjacent window fins to ventilate the air after the frost is formed on the louver; therefore, the air resistance cannot be increased obviously or the air quantity cannot be decreased obviously so as to bring the heat conduction performance of the fin into full play.

Description

technical field [0001] The invention relates to a heat exchanger, in particular to a fin used for the heat exchanger. Background technique [0002] Heat exchangers are common components used in refrigeration systems and air-conditioning systems. They can be divided into condensers and evaporators according to their functions. In order to improve the heat transfer performance of the heat exchanger, among other things, the heat exchanger is usually provided with fins. [0003] Figure 1A and 1B A conventional fin used in a heat exchanger is illustrated, where Figure 1A is the planar view of the fin, Figure 1B is along Figure 1A Sectional view taken along line B-B in . [0004] The fins are made of materials with good thermal conductivity, such as aluminum alloy, and are shaped by processing aluminum alloy plates. In the working state of the heat exchanger, the fins are in contact with the wall surface of the heat exchanger, for example, the wall of the flat tubes, so as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F3/08F28F3/04F25B39/00
CPCF28F1/128F28F2215/04F28F19/006F28F2260/02
Inventor 刘华钊黄宁杰
Owner SANHUA(HANGZHOU) MICRO CHANNEL HEAT EXCHANGER CO LTD