KR-20260064724-A - Coil member, electronic expansion valve, and coil member assembly method

Abstract

A coil member is disclosed, comprising a stator assembly (10), a sealing structure (20), and a waterproof cover (30). The sealing structure (20) covers a portion of the outer surface of the stator assembly (10). The waterproof cover (30) covers the top portion of the stator assembly (10) and is sealedly connected to the top of the sealing structure (20). The sealing structure covers a portion of the outer surface of the stator assembly, and the waterproof cover covers the top portion of the stator assembly. Additionally, the waterproof cover and the sealing structure are sealedly connected. The waterproof cover protects the top portion of the stator assembly, thereby ensuring that the top portion of the stator assembly has a waterproof function. This prevents problems where liquids, such as rainwater, enter from the top portion of the stator assembly and affect product performance. Furthermore, an electronic expansion valve using the coil member and a method for assembling the coil member are further disclosed.

Inventors

• 장, 지여우
• 천, 용하오
• 천, 찬펑
• 왕, 먀오먀오

Assignees

• 제지앙 둔안 아트피셜 인바이런먼트 컴퍼니 리미티드

Dates

Publication Date

20260507

Application Date

20240926

Priority Date

20230928

Claims (20)

1. In the coil member, A coil member comprising a stator assembly (10), a bag structure (20), and a waterproof cover (30), wherein the bag structure (20) covers a portion of the outer surface of the stator assembly (10), and the waterproof cover (30) covers the top portion of the stator assembly (10) and is sealedly connected to the top of the bag structure (20).
2. In paragraph 1, The coil member further comprises a waterproof bottom sheet (40), wherein the waterproof bottom sheet (40) covers the bottom portion of the stator assembly (10) and is sealedly connected to the bottom of the bag structure (20).
3. In paragraph 2, A coil member characterized in that the above-mentioned bag structure (20), the above-mentioned waterproof cover (30), and the above-mentioned waterproof floor sheet (40) are all injection-molded structures made of plastic material, and the above-mentioned waterproof cover (30) and the above-mentioned waterproof floor sheet (40) are all welded to the above-mentioned bag structure (20).
4. In paragraph 3, A coil member characterized in that one end of the waterproof cover (30) facing the bag structure (20) is an annular upper fitting surface, and at least one annular upper connecting rib (31) is provided on the upper fitting surface, and the waterproof cover (30) is welded to the bag structure (20) through the upper connecting rib (31).
5. In paragraph 4, A coil member characterized in that the upper fitting surface is provided with an annular upper fusion groove (32), and the upper fusion groove (32) is used to receive excess material remaining after the upper connecting rib (31) is melted.
6. In paragraph 3, A coil member characterized in that one end of the waterproof floor sheet (40) facing the bag structure (20) is an annular lower fitting surface, and at least one annular lower connecting rib (41) is provided on the lower fitting surface, and the waterproof floor sheet (40) is welded to the bag structure (20) through the lower connecting rib (41).
7. In paragraph 6, A coil member characterized in that the lower fitting surface is provided with an annular lower fusion groove (42), and the lower fusion groove (42) is used to receive excess material remaining after the lower connecting rib (41) is melted.
8. In paragraph 3, A coil member characterized in that an annular upper connecting rib (31) is provided at the top of the above-mentioned bag structure (20), and the waterproof cover (30) is welded to the above-mentioned bag structure (20) through the upper connecting rib (31), and/or, an annular lower connecting rib (41) is provided at the bottom of the above-mentioned bag structure (20), and the waterproof floor sheet (40) is welded to the above-mentioned bag structure (20) through the lower connecting rib (41).
9. In paragraph 2, A coil member characterized in that the end surfaces of the waterproof cover (30) and the bag structure (20) are butt-supported to each other and the waterproof cover (30) and the bag structure (20) are hook-connected, and/or, the end surfaces of the waterproof floor sheet (40) and the bag structure (20) are butt-supported to each other and the waterproof floor sheet (40) and the bag structure (20) are hook-connected.
10. In paragraph 2, A coil member characterized in that the above-described bag structure (20) has an upper catch groove (21), the above-described waterproof cover (30) has an upper clip fastener (33), and the upper clip fastener (33) is caught in the upper catch groove (21); or, the above-described waterproof cover (30) has an upper catch groove (21), the above-described bag structure (20) has an upper clip fastener (33), and the upper clip fastener (33) is caught in the upper catch groove (21).
11. In paragraph 2, A coil member characterized in that the above-mentioned bag structure (20) is provided with a lower catch groove (22), the above-mentioned waterproof floor sheet (40) is provided with a lower clip fastener (43), and the lower clip fastener (43) is engaged with the lower catch groove (22), or the above-mentioned waterproof floor sheet (40) is provided with a lower catch groove (22), the above-mentioned bag structure (20) is provided with a lower clip fastener (43), and the lower clip fastener (43) is engaged with the lower catch groove (22).
12. In paragraph 2, The above-described waterproof floor sheet (40) is provided with an avoidance hole (44), the avoidance hole (44) is used to avoid a valve body penetrating the stator assembly (10), the diameter of the avoidance hole (44) is D1, the diameter of the valve body is D2, and D2 < D1 ≤ D2+0.15mm, characterized in that the coil member.
13. In paragraph 2, The above-mentioned waterproof floor sheet (40) is provided with an avoidance hole (44), the avoidance hole (44) is used to avoid a valve body penetrating the stator assembly (10), the inner wall of the waterproof floor sheet (40) is provided with an annular rib (45) surrounding the avoidance hole (44), and a sealing groove is formed between the annular rib (45) and the inner wall of the waterproof floor sheet (40), and the coil member further includes a sealing ring (50), the sealing ring (50) is located within the sealing groove, and the sealing ring (50) is used to seal the gap between the valve body and the avoidance hole (44).
14. In paragraph 1, The above-mentioned waterproof cover (30) comprises a small cylinder section (34) and a large cylinder section (35) connected to each other, wherein the diameter of the small cylinder section (34) is smaller than the diameter of the large cylinder section (35), the large cylinder section (35) covers the top portion of the stator assembly (10) and is sealedly connected to the top of the bag structure (20), and the end of the small cylinder section (34) far from the stator assembly (10) has a sealed top wall, and the small cylinder section (34) is used to accommodate the end of a valve body penetrating the stator assembly (10), characterized in that it is a coil member.
15. In paragraph 1, The above-described stator assembly (10) comprises a coil assembly (11) and two stator housings, and the encapsulation structure (20) is injection-molded and encapsulates the coil assembly (11), and the two stator housings are installed facing each other and cover a portion of the coil assembly (11) and the encapsulation structure (20), and the other portion of the encapsulation structure (20) forms an encapsulation layer, wherein the encapsulation layer encapsulates the positions of the two stator housings facing each other and the remaining positions of the two stator housings are exposed to the outside of the encapsulation layer, characterized in that the coil member.
16. In paragraph 2, The above-described stator assembly (10) is provided with a coil assembly (11), and an annular gap is formed between the waterproof cover (30) and the waterproof floor sheet (40), and the sealing structure (20) is an injection molded structure, and the sealing structure (20) fills the void within the stator assembly (10) to seal the coil assembly (11), and the sealing structure (20) fills the annular gap and is sealedly connected to the waterproof cover (30) and the waterproof floor sheet (40).
17. In electronic expansion valves, The electronic expansion valve comprises a valve body and a coil member according to any one of claims 1 to 16, wherein the valve body penetrates a stator assembly (10) in the coil member.
18. In a method for assembling a coil member used in a coil member according to paragraph 2 or 16, S10, a step of covering the top portion of the stator assembly (10) with a waterproof cover (30) and covering the bottom portion of the stator assembly (10) with a waterproof floor sheet (40), and forming an annular gap between the waterproof cover (30) and the waterproof floor sheet (40); and S20, a method for assembling a coil member, characterized by including the step of injecting an injection material into the stator assembly (10) and the annular gap to form a sealing structure (20) through injection molding, wherein the sealing structure (20) seals the coil assembly (11) of the stator assembly (10), and the sealing structure (20), the waterproof cover (30), and the waterproof floor sheet (40) are sealedly connected.
19. In Paragraph 18, In step S10, at least a portion of the inner wall of the waterproof cover (30) and the outer wall of the stator assembly (10) are brought into close contact, and the contact area of the two surrounds the stator assembly (10), and the coil member assembly method is, A method for assembling a coil member, characterized by further including the step of, before injection molding the above-mentioned bag structure (20), placing the structure assembled in step S10 into an injection molding mold (70), bringing at least a portion of the outer wall of the waterproof cover (30) and the inner wall of the injection molding mold (70) into close contact, and the area of contact between the two surrounds the waterproof cover (30).
20. In Paragraph 18, In step S10, at least a portion of the inner wall of the waterproof floor sheet (40) and the outer wall of the stator assembly (10) are brought into close contact, and the contact area of the two surrounds the stator assembly (10), and the coil member assembly method is, A method for assembling a coil member, characterized by further including the step of, before injection molding the above-mentioned bag structure (20), placing the structure assembled in step S10 into an injection molding mold (70), bringing at least a portion of the outer wall of the waterproof floor sheet (40) and the inner wall of the injection molding mold (70) into close contact, and the contact area of the two surrounds the waterproof floor sheet (40).

Description

Coil member, electronic expansion valve, and coil member assembly method This application claims priority to a patent application filed with the National Intellectual Property Administration of China on September 28, 2023, the application number of which is 2023112820744 and the title of the invention is "coil member and electronic expansion valve". This application claims priority to a patent application filed with the National Intellectual Property Administration of China on June 7, 2024, the application number of which is 202410743464.5 and the title of the invention is "Method for assembling a coil member and a coil member". The present application relates to the field of electronic expansion valve technology, and more specifically to a coil member, an electronic expansion valve, and a method for assembling a coil member. A stator assembly is provided in the coil member of an electronic expansion valve. The stator assembly is provided with a through hole through which the valve body passes. The top portion of the stator assembly is typically an open structure. This allows liquids, such as rainwater falling from the top portion of the stator assembly, to easily enter the interior of the stator assembly, which can cause problems such as short circuits and affect product performance. The present application provides a coil member, an electronic expansion valve, and a method for assembling the coil member, thereby solving the problem in which liquid, such as rainwater, easily enters the coil member from the top of the stator assembly and affects product performance. To solve the aforementioned problem, according to one aspect of the present application, the present application provides a coil member comprising a stator assembly, a sealing structure, and a waterproof cover. The sealing structure covers a portion of the outer surface of the stator assembly. The waterproof cover covers the top portion of the stator assembly and is sealedly connected to the top of the sealing structure. In the above technical solution, a portion of the outer surface of the stator assembly is covered through a sealing structure, and the top and bottom portions of the stator assembly are covered, respectively, through a waterproof cover and a waterproof bottom sheet. Additionally, both the waterproof cover and the waterproof bottom sheet are sealed and connected to the sealing structure. In this way, protection and waterproofing are achieved for the entire outer surface of the stator assembly through a separable protective structure. Compared to conventional integral injection molding protective structures, this prevents problems such as high injection pressure inside the stator assembly and easy occurrence of injection defects in the protective structure, thereby improving product quality. Additionally, the coil member further includes a waterproof bottom sheet. The waterproof bottom sheet covers the bottom portion of the stator assembly and is sealedly connected to the bottom of the bag structure. In addition, the bag structure, waterproof cover, and waterproof floor sheet are all injection-molded plastic structures. The waterproof cover and waterproof floor sheet are both welded to the bag structure. Additionally, one end facing the bag structure of the waterproof cover is an annular upper fitting surface. The upper fitting surface is provided with at least one annular upper connecting rib. The waterproof cover is welded to the bag structure through the upper connecting rib. In addition, the upper fitting surface is provided with an annular upper fusion groove. The upper fusion groove is used to accommodate excess material remaining after the upper connecting rib is melted. Additionally, one end facing the bag structure of the waterproof floor sheet is an annular lower fitting surface. The lower fitting surface is provided with at least one annular lower connecting rib. The waterproof floor sheet is welded to the bag structure through the lower connecting rib. In addition, the lower fitting surface is provided with an annular lower fusion groove. The lower fusion groove is used to accommodate excess material remaining after the lower connecting rib is melted. Additionally, an annular upper connecting rib is provided at the top of the bag structure. The waterproof cover is welded to the bag structure through the upper connecting rib. Also, or, an annular lower connecting rib is provided at the bottom of the bag structure. The waterproof floor sheet is welded to the bag structure through the lower connecting rib. Alternatively, the end faces of the waterproof cover and the bag structure are butt-supported to each other, and the waterproof cover and the bag structure are hook-connected. Also/or, the end faces of the waterproof floor sheet and the bag structure are butt-supported to each other, and the waterproof floor sheet and the bag structure are hook-connected. Additionally, the bag structure is provided with an upper catch g