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Heat exchanger

A technology of heat exchangers and heat sinks, applied in the field of motor vehicle air conditioners, can solve problems such as difficult machining of heat sinks, collisions and damage of surrounding components, and achieve the effect of increasing heat transfer rate

Inactive Publication Date: 2006-10-25
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is difficult to machine the cooling fins 17
[0015] Also, if the fins 17 are made higher than the top of the rib portion 14, the fins 17 are likely to collide with surrounding components and be damaged during the process of assembling the heat exchanger.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0103] The first embodiment is an evaporator for a vehicle air conditioner. First, the overall structure of the evaporator 10 for a vehicle air conditioner will be described. figure 1 An exploded perspective view showing the outline of the general structure of the evaporator, Figure 2 is where the coolant channels indicated by arrows are added to figure 1 exploded perspective view. image 3 shows a side sectional view of the laminated structure of the heat transfer plate 12, and is along figure 1 The cross-sectional view obtained from the line I-I. Figure 4 is an enlarged perspective view of a portion of the heat transfer plate 12 .

[0104] figure 1 The general structure of the evaporator shown in and 2 is substantially the same as that disclosed in the above-mentioned first patent document (Japanese Unexamined Patent Publication No. 11-287580). The evaporator 10 is a cross-flow type heat exchanger in which the flow direction A of the air and the flow direction B of...

no. 2 example

[0187] In the first embodiment, the rib portions 14 for fixing the base plate portions 13 to each other in the two heat transfer plates 12 are provided at positions displaced from each other in the airflow direction A. As shown in FIG. In contrast, in the second embodiment, as Figure 9 As shown in , the rib portions 14 for fixing the base plate portions 13 to each other in the two heat transfer plates 12 are provided at the same position in the airflow direction A.

[0188] In the second embodiment, when the rib portions 14 having a semicircular section in the two heat transfer plates 12 are combined at the same position to form the circular coolant passages 15 and 16, the passage areas of the respective coolant passages 15 and 16 get bigger.

[0189] Thereby, it is possible to reduce the number of rib portions 14 to lengthen the mutual distance between adjacent rib portions 14 , that is, the length of the base plate portion 13 in the airflow direction. Therefore, if Figu...

no. 3 example

[0193]In the second embodiment, the rib portions 14 having a semicircular section in the two heat transfer plates 12 are combined at the same position to obtain the coolant passages 15 and 16 having a circular section. According to the third embodiment, as Figure 10A As shown in , tubular coolant passages 15 and 16 having a circular cross section are formed in a single heat transfer plate 12 by extrusion. Due to this tubular shape, rib portions 14 having a semicircular cross-section protrude from the front and rear surfaces of the single heat transfer plate 12 .

[0194] After this pressing step, the fin portions 17 are pressed out from the flat surface of the base plate portion 13 between adjacent fin portions 14 . exist Figure 10A In the embodiment shown in , the fin portion 17 is formed as a U-shaped slotted fin.

[0195] According to the third embodiment, when the tubular coolant passages 15 and 16 are formed in a single heat transfer plate 12 by extrusion, the number...

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PUM

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Abstract

Air passages 18 are formed between surfaces of a plurality of heat transfer plates 12 laid together. A plurality of rib sections 14 extending orthogonal to the air flowing direction A are formed on a surface of the heat transfer plate 12 and projected into the air passage 18. By shifting the positions of the rib sections 14 to each other in the air flow direction, coolant passages 15, 16 are formed inside the plurality of rib sections 14. Between the plurality of rib sections 14, fin sections 17 are formed integral with the heat transfer plate 12 and projected from the plate surface. The fin section 17 has a protruded shape formed by pressing and having a cut portion partially cut a plate thickness of the heat transfer plate 2.

Description

technical field [0001] The invention relates to heat exchangers in which cooling fins are integrally formed with heat transfer plates constituting inner channels through which a heat exchange fluid flows, and are used, for example, in motor vehicle air conditioners. Background technique [0002] In the prior art, for example, in Japanese Unexamined Patent Publication No. 11-287580 (first patent document), there has been proposed a heat exchanger in which a plurality of rib portions constituting an inner passage through which a heat exchange fluid passes Formed integrally with the heat transfer plate and operating as a turbulence generator for disrupting the direct flow of the airflow flowing on the outside of the heat transfer plate. [0003] According to this structure, since the air-side heat transfer rate can be increased by creating turbulent flow in the air flow, fin components such as corrugated fins in conventional fin and tube heat exchangers can be eliminated. Ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28D1/03
Inventor 加藤吉毅冈本义之下谷昌宏大原敏夫宫岛则义
Owner DENSO CORP
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