FINLESS HEAT EXCHANGER, AND COOLING SYSTEM EMPLOYING SAME

WIPO Patent Application WO/2023/219133

A1

Provided is a finless heat exchanger having side plates to which a refrigerant tube is mechanically affixed. The finless heat exchanger comprises a refrigerant tube 20 which extends in a meandering manner and which includes bent tube portions 21 curved in a U-shape, and straight tube portions 31 connected to both ends of the bent tube portions, and side plates 40 including elongated holes 41, wherein: each bent tube portion includes bent tube end portions 23 positioned on the straight tube portion sides of the bent tube portion, a main deformed portion 27 curved in an arc shape, and secondary deformed portions 25 positioned between the bent tube end portions and the main deformed portion; the main deformed portion includes a flat portion 28 formed by pressing; the secondary deformed portions have a curved shape that is secondarily deformed through the formation of the flat portion; the elongated holes have a central opening 47 for accepting the main deformed portions, and a pair of end openings 43 positioned at both ends of the central opening 47, for partially accepting the secondary deformed portions and the bent tube end portions; and the refrigerant tube is affixed to the side plates by diametrically expanding the bent tube portions with the bent tube portions inserted into the elongated holes, to cause the bent tube portions to come into close contact with the elongated holes.

YAMAZAKI DAICHI (JP)

PCT/JP2023/017752

November 16, 2023

May 11, 2023

Click for automatic bibliography generation  

AFREX CO LTD (JP)

F28F9/013; B21D53/06; F28D1/047; F28F1/00

JP2011021799A	2011-02-03
US20030213259A1	2003-11-20
JP2004003833A	2004-01-08
JPH06201285A	1994-07-19
JP2012202560A	2012-10-22

YAMAO, Norihito et al. (JP)

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