US 11,988,464 B2
Heat exchanger, method for making heat exchanger, and heat exchange system
Jing Zhou, Hangzhou (CN); Hai Huang, Singapore (SG); and Ningjie Huang, East Amherst, NY (US)
Assigned to ZHEJIANG SANHUA INTELLIGENT CONTROLS CO., LTD., Shaoxing (CN)
Filed by HANGZHOU SANHUA RESEARCH INSTITUTE CO., LTD., Hangzhou (CN)
Filed on Dec. 28, 2020, as Appl. No. 17/135,858.
Application 17/135,858 is a continuation of application No. PCT/CN2020/105112, filed on Jul. 28, 2020.
Claims priority of application No. 201910709088.7 (CN), filed on Aug. 1, 2019.
Prior Publication US 2021/0116189 A1, Apr. 22, 2021
Int. Cl. F28F 19/06 (2006.01); F28D 1/053 (2006.01); F28F 1/12 (2006.01)
CPC F28F 19/06 (2013.01) [F28D 1/05383 (2013.01); F28F 1/126 (2013.01); F28F 2245/02 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A heat exchanger, comprising a first collecting pipe, a second collecting pipe, a plurality of heat exchange tubes and at least one fin;
the plurality of heat exchange tubes respectively connecting with the first collecting pipe and the second collecting pipe, the heat exchange tube comprising a pipe wall and a refrigerant flow channel for a refrigerant to circulate, the heat exchange tube comprising a first end and a second end along an extension direction of the heat exchange tube, the refrigerant flow channel extending from the first end to the second end along the extension direction of the heat exchange tube and extending through the heat exchange tube, and the refrigerant flow channel of the heat exchange tube communicating with an inner cavity of the first collecting pipe and an inner cavity of the second collecting pipe;
the fin being at least partially arranged between two adjacent heat exchange tubes;
wherein the heat exchanger further comprises a hygroscopic colloid adhered to at least part of an outer surface of the heat exchange tube and/or at least part of an outer surface of the fin;
wherein the outer surface of the fin comprises a covered area and a non-covered area, the covered area is covered with the hygroscopic colloid, and the non-covered area is not in contact with the hygroscopic colloid; and
wherein the heat exchanger further comprises at least one of (a), (b) and (c):
(a) the hygroscopic colloid is covered along a width direction of the fin, and the covered area occupies 30% to 50% of a total width of the fin;
(b) the hygroscopic colloid is covered along a length direction of the fin, and the covered area occupies 5% to 15% of a total length of the fin;
(c) the hygroscopic colloid is covered along a height direction of the fin, and the covered area occupies 10% to 30% of a total height of the fin.