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Fin for heat exchanger and heat exchanger with fin

A technology of heat exchangers and fins, which is applied in the field of heat exchangers, can solve the problems of heat exchanger fin air volume reduction, affecting the performance of heat exchangers, etc., and achieve the effect of improving heat exchange performance and reducing water accumulation

Active Publication Date: 2010-07-28
SANHUA HANGZHOU MICRO CHANNEL HEAT EXCHANGER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the heat exchanger is used as an evaporator, water will accumulate on the surface of the fins due to the surface tension of the liquid, thereby reducing the air volume passing through the fins of the heat exchanger and affecting the performance of the heat exchanger

Method used

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  • Fin for heat exchanger and heat exchanger with fin
  • Fin for heat exchanger and heat exchanger with fin
  • Fin for heat exchanger and heat exchanger with fin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Figure 4(a) is a schematic view of a fin 1 according to an embodiment of the present invention. Fig. 4(b) is a cross-sectional view taken along the line IV-IV in Fig. 4(a). As shown in FIGS. 4( a ) and 4 ( b ), a fin 1 for a heat exchanger according to an embodiment of the present invention includes a circular arc segment 11 , a straight segment 12 , and a louver 15 . The shutter 15 includes a louver 19 .

[0030] As shown in Figures 4(a) and 4(b), the fin inclination angle of the fin 1 for heat exchanger according to the present invention (ie, the angle between the straight section of the fin and the horizontal plane) b, the circular arc The radius R of the segment 11, the fin pitch (that is, roughly the distance between the centers of adjacent arc segments) P, the center angle c of the arc segment 11, and the fin height H_Fin satisfy the following geometric relationship:

[0031] tan b = P 2 ...

Embodiment 2

[0045] As shown in Fig. 4(b), the accumulation of water in the area 18 between the fenestration sheets 19 is mainly caused by the surface tension of the water between the adjacent fenestration sheets 19. The surface tension formula of the water between the fenestration sheets is as follows The formula for the surface tension of water between fins, if the fenestration distance (that is, the minimum distance between the opposing surfaces of adjacent fenestrations) S can be increased, the surface tension of water between fenestrations can be reduced or eliminated , which can reduce or eliminate the accumulation of water between the windows. After calculating the window opening distance S=W_Louver×sin a≥0.4mm, the surface tension between the window opening sheets can be effectively weakened, where W_Louver is the window opening distance. W_Louver≥1mm can be selected, where a is the inclination angle of the window opening 19, as shown in FIG. 4(b).

[0046]As shown in Figure 4(a),...

Embodiment 3

[0049] Figure 5 The state after the fin 1 according to the embodiment of the present invention is installed in the heat exchanger is shown. The radius R of the arc segment satisfies the relational expression 0.35mm Figure 5 As shown in , when the fins 1 are installed in the heat exchanger, a pressing force between the flat tubes 5 and the fins 1 can be made. The contact area between the fin and the flat tube is further increased, and at the same time, the heat exchange efficiency of the fin can be further improved, and the heat exchange performance can be further improved, and the increase of the R value reduces the water surface tension in the arc area, making it easier to drain. R>0.4mm after the sheet is compressed.

[0050] For each selectable range of parameters tan b, c, R, P, S, W_Louver, H_Louver / H_Fin, 2Rsin(c / 2), 2R(1-cos(c / 2)) in Examples 1-3, The parameters tan b, c, R, P, S, W_Louver, H_Louver / H_Fin, 2Rsin(c / 2), 2R(1-cos(c / 2)) can satisfy the above related rang...

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Abstract

The invention provides a fin which comprises a plurality of straight line segments and a plurality of circular arc segments. The straight line segments approximately present the shapes of straight lines, and the circular arc segments connected with the straight line segments approximately present the shapes of circular arcs. A central angle c of each circular arc segment is smaller than or equal to zero DEG and is equal to or larger than 150 DEG, and the semi-diameter R of each circular arc segment is smaller than or equal to 0.35mm and is equal to or larger than 1mm. By adopting the above structure, the fin effectively reduces accumulated water, thereby improving the heat exchanging performance.

Description

technical field [0001] The present invention relates to a fin for a heat exchanger, and a heat exchanger with the fin. Background technique [0002] like Figure 1A and 1B As shown in , a conventional heat exchanger such as an evaporator comprises flat fluid flow channels 5 for heat exchange, such as flat tubes; and fenestrated fins 1' disposed between the flat fluid flow channels 5 . [0003] The fin 1' of the heat exchanger includes a circular arc segment 11', a straight segment 12', and a louver 15'. like Figures 1A to 3 shown. [0004] When the heat exchanger is used as an evaporator, water will accumulate on the surface of the fins due to the surface tension of the liquid, thereby reducing the air volume passing through the heat exchanger fins and affecting the performance of the heat exchanger. The main three main parts of the fins are the arc area 17', the area 16' between the straight sections 12', and the area 18' between the windows 19', such as Figure 2-3 ...

Claims

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Application Information

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IPC IPC(8): F28F1/30F28F13/04F28D1/04
Inventor 蒋建龙黄宁杰
Owner SANHUA HANGZHOU MICRO CHANNEL HEAT EXCHANGER
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