Water inlet solenoid valve capable of improving electromagnetic attraction and implementing method therefor

A method for manufacturing a stator assembly of water inlet solenoid valve, comprising:

• forming a water-isolating sleeve assembly (300) with a magnetic conductive sleeve by injecting plastic into an upper magnetic conductive inner sleeve (113), a stopper (106) and a lower magnetic conductive inner sleeve (114) to form a water-isolating sleeve (117);
• forming a coil assembly (103) by installing an element including an insert (107) on a coil rack (104) wound with a coil winding (109), wherein a yoke (111) connecting the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114) is fixed outside the coil assembly (103);
• inserting the water-isolating sleeve assembly (300) with the magnetic conductive sleeve into the hole (125) of the coil rack of the coil assembly (103) to form a stator assembly;
• injecting plastic into the stator assembly to cover the coil winding and the yoke on the stator assembly in order to manufacture the stator assembly (100) with water-isolating sleeve.

A stator assembly (100) of a water inlet solenoid valve, comprising:

• a coil assembly (103), wherein a coil winding (109) is wound on a coil rack (104) of the coil assembly (103), an insert (107) is arranged on the coil rack (104) and a hole (125) of coil rack is formed in the middle of the coil rack (104);
• a plastic sealing layer (116) covering the coil assembly, wherein the plastic sealing layer (116) does not cover the part of the insert (107) electrically connected with an external power supply;
• an upper magnetic conductive inner sleeve (113) and a lower magnetic conductive inner sleeve (114) respectively arranged in the hole (125) of the coil rack;
• a water-isolating sleeve (117) formed by injection plastic on inner surfaces of the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114);
• a yoke (111) located outside the coil assembly and covered by the plastic sealing layer (116), wherein upper end and lower end of the yoke (111) are closely connected with the upper magnetic conductive inner sleeve (113) and the lower magnetic conductive inner sleeve (114) by the plastic sealing layer 116.