US 11,913,163 B2
Heat exchanger and manufacturing method of home appliance including the heat exchanger
Sangkwon Han, Seoul (KR); Myeongdeok Kim, Seoul (KR); and Jeonggeun Choi, Seoul (KR)
Assigned to LG Electronics Inc., Seoul (KR)
Filed by LG Electronics Inc., Seoul (KR)
Filed on Aug. 13, 2020, as Appl. No. 16/992,800.
Claims priority of application No. 10-2019-0099748 (KR), filed on Aug. 14, 2019; and application No. 10-2020-0010694 (KR), filed on Jan. 29, 2020.
Prior Publication US 2021/0047774 A1, Feb. 18, 2021
Int. Cl. D06F 58/20 (2006.01); D06F 58/02 (2006.01); D06F 58/24 (2006.01); F28F 19/02 (2006.01)
CPC D06F 58/206 (2013.01) [D06F 58/02 (2013.01); D06F 58/24 (2013.01); F28F 19/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A clothes dryer comprising:
a cabinet that defines an outer appearance of the clothes dryer;
a drum located in the cabinet and configured to accommodate clothes therein; and
a heat exchanger configured to remove moisture from the clothes accommodated in the drum or to generate hot air,
wherein the heat exchanger comprises:
a copper pipe that defines a refrigerant circulation passage, and
a plurality of fins oriented in parallel and spaced apart from each other, the plurality of fins being coupled to an outer circumferential surface of the copper pipe,
wherein the copper pipe comprises:
a plurality of straight tubes that each extend along a direction of the plurality of fins, and
a plurality of return bends connected to the plurality of straight tubes, each of the plurality of the return bends being welded to two of the plurality of straight tubes, and each end of the plurality of return bends being connected to one end of the plurality of straight tubes, respectively,
wherein burrs that have a circumference greater than an outer diameter of each of the plurality of straight tubes are located at both ends of the plurality of straight tubes based on expansion of the plurality of straight tubes,
wherein a distance between a rim of the burrs and an outer surface of the plurality of straight tubes is in a range from 0.4 mm to 1.8 mm, and
wherein coating layers that provide corrosion resistance are located on a surface of the plurality of return bends, a surface of weld zones for the return bends, and a surface of the burrs.