US 12,313,294 B2
PTC heater
Feng Liu, Shanghai (CN); Xianglin Zeng, Shanghai (CN); Qingshui Song, Shanghai (CN); and Jiang Xu, Shanghai (CN)
Assigned to BESTWAY INFLATABLES & MATERIAL CORP., Shanghai (CN)
Filed by BESTWAY INFLATABLES & MATERIAL CORP., Shanghai (CN)
Filed on Sep. 7, 2023, as Appl. No. 18/243,381.
Application 18/243,381 is a continuation of application No. 17/235,378, filed on Apr. 20, 2021, abandoned.
Application 17/235,378 is a continuation of application No. 15/698,776, filed on Sep. 8, 2017, granted, now 11,002,465, issued on May 11, 2021.
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 2023/0417450 A1, Dec. 28, 2023
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)] 20 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, wherein the heat conductor is configured to flow liquid horizontally through the liquid passage channel in the lengthwise direction, such that the lengthwise direction is horizontal during passage of the liquid, and
a duct formed in the lengthwise direction through the heat conductor;
a positive temperature coefficient (PTC) heating element disposed in the lengthwise direction within the duct, at least a first end of the PTC heating element being coplanar with a first end of the heat conductor and disposed within the duct;
an end cover coupled to the first end of the heat conductor and comprising a space therein configured to accommodate a second end of the PTC heating element; and
a sealing gasket disposed around an opening of the duct between the end cover and the first end of the heat conductor.