US 12,007,038 B2
Water inlet solenoid valve capable of improving electromagnetic attraction and implementing method therefor
Hongbiao Wang, Guangdong (CN); and Lin Ao, Guangdong (CN)
Assigned to JIANGMEN TIANDI ELECTRICAL APPLIANCE CO., LTD, Guangdong (CN)
Filed by JIANGMEN TIANDI ELECTRICAL APPLIANCE CO., LTD, Guangdong (CN)
Filed on Mar. 23, 2022, as Appl. No. 17/702,178.
Application 17/702,178 is a continuation of application No. 17/762,580, previously published as PCT/CN2020/112858, filed on Sep. 1, 2020.
Claims priority of application No. 201910898273.5 (CN), filed on Sep. 23, 2019.
Prior Publication US 2022/0213975 A1, Jul. 7, 2022
Int. Cl. F16K 31/06 (2006.01); B29C 45/14 (2006.01); F16K 27/02 (2006.01); F16K 27/04 (2006.01); B29L 31/00 (2006.01)
CPC F16K 31/0675 (2013.01) [B29C 45/14614 (2013.01); F16K 27/029 (2013.01); F16K 31/0655 (2013.01); B29L 2031/7506 (2013.01); F16K 27/048 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method for manufacturing a stator assembly of a water inlet solenoid valve, comprising:
forming a coil assembly (103) with a cavity by installing an element including an insert (107) on a coil rack (104) wound with a coil winding (109);
forming a stator assembly (102) by installing an upper magnetic conductive inner sleeve (113) and a lower magnetic conductive inner sleeve (114) in a hole (125) of the coil rack (104) of the coil assembly (103), and fixing a yoke (111) connecting the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114) outside the coil assembly (103);
by injecting plastic on the stator assembly (102), covering the coil winding (109) and the yoke (111) with plastic sealing layer (116), exposing the insert (107) and the hole (125) in the coil rack, thereby manufacturing a primary plastic-sealed stator assembly (101);
by injecting plastic on inner surfaces of the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114) of the primary plastic-sealed stator assembly (101), forming a water-isolating sleeve (117) on inner surfaces of the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114), thereby manufacturing the stator assembly (100) with the water-isolating sleeve.