发明名称 |
Finned tube for heat exchangers, heat exchanger, process for producing heat exchanger finned tube, and process for fabricating heat exchanger |
摘要 |
A heat exchanger finned tube 10 for use in fabricating a heat exchanger 1 useful as the evaporator for refrigerators or the like wherein a hydrocarbon refrigerant is used. Two tube insertion holes spaced apart from each other are formed in each of plate fins 12, and two straight tube portions 11a of a hairpin tube 11 are inserted through the respective holes of each plate fin to arrange the plate fins 12 in parallel into a plurality of fin groups 13 spaced apart on the straight tube portions 11a longitudinally thereof. The hairpin tube 11 is enlarged with use of a fluid to fixedly fit the plate fins 12 of each tin group 13 around an enlarged tube portion 14 of the hairpin tube 11 and provide a finless part 19 between each pair of adjacent fin groups 13 on each of the straight tube portions 11a. A restrained small-diameter portion 15 is provided in each of the finless parts 19 of each straight tube portion 11a. The heat exchanger 1 fabricated using the finned tube 10 exhibits the desired refrigeration performance with the leakage of refrigerant diminished.
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申请公布号 |
US2004261982(A1) |
申请公布日期 |
2004.12.30 |
申请号 |
US20040492206 |
申请日期 |
2004.04.22 |
申请人 |
WATANABE ISAO;MARUGASA SHIGEO |
发明人 |
WATANABE ISAO;MARUGASA SHIGEO |
分类号 |
B21D53/08;F25B39/02;F28D1/047;F28F1/32;F28F1/40;(IPC1-7):F28D1/00;A47F3/04 |
主分类号 |
B21D53/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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