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Refrigerant evaporator and manufacturing method thereof

A refrigerant and evaporator technology, applied in evaporators/condensers, refrigerators, refrigeration components, etc., can solve the problem of increasing the number of parts

Active Publication Date: 2021-12-07
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, in the refrigerant evaporator described in the aforementioned Patent Document 1, since the intermediate header portion is constituted by three plates, the number of parts may increase.

Method used

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  • Refrigerant evaporator and manufacturing method thereof
  • Refrigerant evaporator and manufacturing method thereof
  • Refrigerant evaporator and manufacturing method thereof

Examples

Experimental program
Comparison scheme
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no. 1 approach

[0042] use Figure 1 to Figure 10 A first embodiment of the present invention will be described. The refrigerant evaporator according to the present embodiment is a cooling heat exchanger applied to a vapor compression refrigeration cycle of a vehicle air conditioner that adjusts the temperature in the vehicle interior. Air) absorbs heat to evaporate the refrigerant (liquid-phase refrigerant), thereby cooling the air.

[0043] In addition, in this embodiment, air corresponds to "fluid to be cooled". In addition, in figure 1 as well as figure 2 In , the illustration of the fins 30 described later is omitted.

[0044] As is well known, a refrigeration cycle includes, in addition to a refrigerant evaporator, a compressor (not shown), a radiator (condenser), an expansion valve, etc. Receiver cycle. In addition, refrigerating machine oil for lubricating the compressor is mixed with the refrigerant in the refrigerating cycle, and part of the refrigerating machine oil circulat...

no. 2 approach

[0128] Next, based on Figure 11 as well as Figure 12 A second embodiment of the present invention will be described. The shapes and the like of the tubes 15 and 25 of the second embodiment are different from those of the first embodiment described above.

[0129] Such as Figure 11 as well as Figure 12 As shown, in this embodiment, the cross-sectional area of ​​the first pipe 15 is smaller than that of the second pipe 25 . Specifically, the length of the air flow direction X of the first pipe 15 is shorter than the length of the air flow direction X of the second pipe 25 . In addition, the number of narrow channels 150 in the first tube 15 is smaller than the number of narrow channels 250 in the second tube 25 .

[0130] According to this embodiment, among the first pipe 15 and the second pipe 25, the cross-sectional area of ​​the first pipe 15 through which a large amount of liquid-phase refrigerant flows can be reduced, and the second pipe 25 through which a large am...

no. 3 approach

[0132] Next, based on Figure 13 as well as Figure 14 A third embodiment of the present invention will be described. Compared with the above-mentioned first embodiment, the shape and the like of the intermediate header portion 50 of the present third embodiment are different.

[0133] Such as Figure 13 As shown, in this embodiment, the shapes of the plurality of intermediate passages 40 arranged in the tube lamination direction, that is, the ribs 523 are different from each other. Specifically, when viewed from the air flow direction X, the lengths of the plurality of intermediate channels 40 (the plurality of ribs 523 ) in the tube longitudinal direction are different from each other. Accordingly, the channel areas of the plurality of intermediate channels 40 are different from each other.

[0134] Specifically, in the intermediate header portion 50 of the present embodiment, the larger the heat load on the air side, the larger the flow path area of ​​the intermediate f...

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Abstract

A refrigerant evaporator includes a first core (11), a second core (21), a first plate (51), and a second plate (52). The first core and the second core each include a plurality of first tubes (15) and a plurality of second tubes (25) extending in a tube length direction and stacked in a tube stacking direction perpendicular to the tube length direction. The first plate accommodates one ends of the plurality of first tubes and the plurality of second tubes. The second plate faces the first core and the second core with the first plate interposed therebetween in the tube length direction, and is joined to the first plate. The second plate has a plurality of ribs (523). A plurality of ribs define a plurality of intermediate flow paths (40) inside the first plate together with the first plate. The plurality of intermediate flow paths communicate the plurality of first tubes with the plurality of second tubes.

Description

[0001] Cross-reference of related applications [0002] This application is based on Japanese Patent Application No. 2017-094153 filed on May 10, 2017, and the disclosure thereof is incorporated herein by reference. technical field [0003] The invention relates to a refrigerant evaporator for cooling fluid to be cooled and a manufacturing method thereof. Background technique [0004] Conventionally, as a refrigerant evaporator used in a refrigeration cycle of an air conditioner, various proposals have been made that include at least two heat exchange cores and an intermediate header that transfers heat from one of the heat exchange cores. The refrigerant is assembled, and the refrigerant is distributed to the other heat exchange core. [0005] In such a refrigerant evaporator, since a plurality of tubes through which the refrigerant flows are inserted and joined to the intermediate header portion, the internal volume of the intermediate header portion becomes large. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/02F28D1/053F28F1/02F28F9/02
CPCF25B39/02F28D1/05391F28D1/0417F28F1/022F28F1/126F28F2009/224F28D2021/0085F28F9/0217F28F17/005F25B5/04F25B39/024F25B39/028
Inventor 小佐佐铁男
Owner DENSO CORP