电子膨胀阀
By using a deformable seal in the electronic expansion valve, the problem of seal failure was solved, the sealing performance was improved, the risk of internal leakage was reduced, and the normal operation of the electronic expansion valve was ensured.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG DUNAN HETIAN METAL CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-17
AI Technical Summary
In existing electronic expansion valves, sealing failure may occur during the valve core sleeve sealing interval, leading to internal leakage.
Design an electronic expansion valve that uses a seal with a deformation structure. The seal generates radial deformation through its axial section to accommodate machining or manufacturing errors between the valve seat core and the valve body, thus ensuring a sealing effect.
This improved sealing performance, reduced the risk of internal leakage, and ensured the effectiveness of the electronic expansion valve.
Smart Images
Figure CN224517073U_ABST
Abstract
Claims
1. An electronic expansion valve characterized by, The electronic expansion valve includes: Valve body (100), the valve body (100) having a valve cavity (101); A valve seat core (200) is disposed inside the valve body (100). The valve seat core (200) has a valve core cavity (201). There is a gap (01) between the outer wall of the valve seat core (200) and the inner wall of the valve body (100) to form a flow gap. The valve core cavity (201) can communicate with the valve cavity (101) through the gap (01). A valve core sleeve (300) is disposed within the valve cavity (101) and is movable relative to the interval (01) to block or open the interval (01). The valve core sleeve (300) has a sealing element (310) at one end facing the interval (01) for blocking the interval (01). The sealing element (310) has a deformation structure on the side facing the interval (01) and is capable of radial deformation through the cross section along the axial direction of the deformation structure to seal the interval (01).
2. The electronic expansion valve according to claim 1, characterized in that The seal (310) is provided with a groove (320), which forms the deformation structure.
3. The electronic expansion valve according to claim 2, characterized in that Along the axial direction of the seal (310), the seal (310) has a first end and a second end disposed opposite to each other, the first end being disposed toward the gap (01), and the opening of the slot (320) being located on the end face of the first end, or on the side wall between the first end and the second end.
4. The electronic expansion valve according to claim 2, wherein In the axial direction of the seal (310), the cross-sectional shape of the slot (320) is a non-closed shape.
5. The electronic expansion valve according to claim 1, wherein The sealing element (310) has a first sealing surface (311) and a second sealing surface (312) arranged opposite to each other. When the sealing element (310) blocks the gap (01), the first sealing surface (311) is sealed to the outer wall of the valve seat core (200), and the second sealing surface (312) is sealed to the inner wall of the valve body (100). The first sealing surface (311) and the second sealing surface (312) are spaced apart by the deformation structure, and the first sealing surface (311) and the second sealing surface (312) can generate relative displacement through the deformation structure.
6. The electronic expansion valve according to claim 5, wherein The seal (310) has a sealing portion (313) disposed on the side of the seal (310) facing the gap (01). At least a portion of the inner diameter of the sealing portion (313) gradually decreases in the direction away from the gap (01). The inner sidewall of the sealing portion (313) forms the first sealing surface (311), and the outer sidewall of the sealing portion (313) forms the second sealing surface (312). At least a portion of the outer diameter of the sealing portion (313) gradually increases in the direction away from the gap (01).
7. The electronic expansion valve according to claim 6, characterized in that When the seal (310) blocks the gap (01), at least a portion of the seal (313) is located within the gap (01).
8. The electronic expansion valve according to claim 1, wherein The interval (01) is circular.
9. The electronic expansion valve of claim 1, wherein The electronic expansion valve also has a valve needle assembly (400) movably disposed within the valve cavity (101), a valve seat core (200) having a valve port communicating with the valve core cavity (201), the valve needle assembly (400) being movable relative to the valve port, a valve core sleeve (300) being sleeved on the outside of the valve needle assembly (400), the valve core sleeve (300) having a flow cavity (301), and the valve port being able to communicate with the valve cavity (101) through the flow cavity (301).
10. The electronic expansion valve according to claim 9, wherein The valve core sleeve (300) also includes a cylindrical body (330) having the flow cavity (301), and the end of the cylindrical body (330) facing the interval (01) having an installation groove, and the sealing element (310) being disposed in the installation groove.
11. The electronic expansion valve according to claim 10, wherein The seal (310) has a mounting portion (314) located on the side of the seal (310) away from the gap (01), the mounting portion (314) is installed in the mounting groove, and the outer side wall of the mounting portion (314) is interference-fitted or transition-fitted with the inner side wall of the mounting groove.