US 12,372,271 B2
PTC heater
Feng Liu, Shanghai (CN)
Assigned to BESTWAY INFLATABLES & MATERIALS CORP., Shanghai (CN)
Filed by BESTWAY INFLATABLES & MATERIAL CORP., Shanghai (CN)
Filed on Apr. 20, 2021, as Appl. No. 17/235,378.
Application 17/235,378 is a continuation of application No. 15/698,776, filed on Sep. 8, 2017, granted, now 11,002,465.
Application 15/698,776 is a continuation in part of application No. 15/414,190, filed on Jan. 24, 2017, granted, now 10,228,158, issued on Mar. 12, 2019.
Application 15/414,190 is a continuation of application No. 14/676,665, filed on Apr. 1, 2015, granted, now 9,618,230, issued on Apr. 11, 2017.
Claims priority of application No. 201420552731.2 (CN), filed on Sep. 24, 2014.
Prior Publication US 2021/0239359 A1, Aug. 5, 2021
Int. Cl. F24H 1/10 (2022.01); F24H 1/12 (2022.01); F24H 9/00 (2022.01); F24H 9/14 (2006.01); F24H 9/1818 (2022.01); H05B 3/04 (2006.01); H05B 3/06 (2006.01); H05B 3/44 (2006.01)
CPC F24H 1/102 (2013.01) [F24H 1/121 (2013.01); F24H 9/0015 (2013.01); F24H 9/146 (2013.01); F24H 9/1827 (2013.01); H05B 3/04 (2013.01); H05B 3/06 (2013.01); H05B 3/44 (2013.01); H05B 2203/016 (2013.01); H05B 2203/02 (2013.01); H05B 2203/021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A heating unit comprising:
a heat conductor comprising a liquid passage channel formed in a lengthwise direction through the heat conductor, and a duct formed in the lengthwise direction through the heat conductor;
a positive temperature coefficient (PTC) heating element disposed within the duct, at least a first end of the PTC heating element being coplanar with a first end of the heat conductor;
an end cover coupled to the first end of the heat conductor; and
a sealing gasket disposed around an opening of the duct between the end cover and the first end of the heat conductor.