Title:
FINLESS HEAT EXCHANGER, AND COOLING SYSTEM EMPLOYING SAME
Document Type and Number:
WIPO Patent Application WO/2024/053317
Kind Code:
A1
Abstract:
Provided is a finless heat exchanger in which a heat transfer pipe and a connecting pipe are bonded together without forming a flared diametrically expanded portion. The finless heat exchanger comprises a heat transfer pipe 20 which extends in a serpentine fashion and which includes a cylindrical base portion 26, a joint portion 24 having an external diameter greater than an external diameter of the cylindrical base portion, and an intermediate portion 25 joining the cylindrical base portion and the joint portion, a connecting pipe 30 including an insertion portion 31 capable of being inserted into the joint portion, and an exposed portion 32 positioned in a position that does not overlap the joint portion in a side view, and a bonding portion 60 for bonding the connecting pipe and the heat transfer pipe using a brazing material 36, wherein: a circumferential edge 34 of the insertion portion abuts and is supported by the intermediate portion; a bonding space 45 is formed in a region enclosed by a joint inner circumferential surface 24a of the joint portion, a connecting outer circumferential surface 30a of the insertion portion, and the circumferential edge; melted brazing material flows into the bonding space to form a gap bonding portion 61; and the gap bonding portion acts as the bonding portion.
Inventors:
YAMAZAKI DAICHI (JP)
Application Number:
PCT/JP2023/028902
Publication Date:
March 14, 2024
Filing Date:
August 08, 2023
Export Citation:
Assignee:
AFREX CO LTD (JP)
International Classes:
B23K1/00; B23K1/14; B23K1/18; B23K1/19; B23K3/06; F28D1/047
Domestic Patent References:
| WO2012109132A1 | 2012-08-16 | |||
| WO2019116413A1 | 2019-06-20 |
Foreign References:
| JP2006002979A | 2006-01-05 | |||
| JPH0768374A | 1995-03-14 |
Attorney, Agent or Firm:
YAMAO, Norihito et al. (JP)
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