Valve seat assembly and electronic expansion valve
By adopting a combined structure of an internal sealing ring and a mating sealing ring in the electronic expansion valve, the problem of poor sealing effect between the valve needle assembly and the valve seat assembly in the prior art is solved, and efficient sealing and service life are achieved.
Patent Information
- Application Number
- CN202421370913.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-17
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-06-17
AI Technical Summary
In existing electronic expansion valves, the sealing effect between the valve needle assembly and the inner cavity of the valve seat assembly is poor and the service life is average.
The combined structure of the internal sealing ring and the mating sealing ring is adopted. The internal sealing ring in the annular groove is extruded and matched with the arc surface of the mating sealing ring, and the inner wall of the mating sealing ring is sealed and matched with the valve core assembly to achieve efficient sealing between the valve core assembly and the chamber.
It greatly improves the sealing effect, extends the service life, and has the advantages of simple structure, easy use and low production cost.
Smart Images
Figure CN222773574U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a valve seat component and an electronic expansion valve. Background Art
[0002] At present, electronic expansion valves are usually used to regulate the flow of fluids in various refrigeration and heating equipment such as air conditioners, refrigerators, and heat pump water heaters. Electronic expansion valves are usually composed of valve seat components, valve needle components, and seals. The internal and external sealing of the valve seat component is the top priority of the electronic expansion valve. Among them, the current sealing method between the valve needle component and the inner cavity of the valve seat component usually directly adopts a sealing ring structure. One is to embed and install the sealing ring on the inner wall of the inner cavity, and the other is to open a circle of annular grooves on the outer wall of the valve needle component and install the sealing ring in the annular groove. The sealing effect of these two structures is poor and the service life is average. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a valve seat assembly and an electronic expansion valve, which adopt an internal sealing ring and a matching sealing ring to achieve the sealing between the valve core assembly and the chamber, which can greatly improve the sealing effect and prolong the service life.
[0004] The technical solution adopted by the utility model to solve its technical problems is: to provide a valve seat assembly, including a valve seat body, the valve seat body having a chamber for accommodating a valve core assembly, a first flow hole being provided on the side wall of the valve seat body, a second flow hole being provided on the bottom of the valve seat body, the first flow hole and the second flow hole being communicated with the chamber, an annular groove being provided on the inner wall of the chamber, an internal sealing ring and a matching sealing ring being installed in sequence from the inside to the outside of the annular groove, the matching sealing ring being in the shape of a circular ring, the outer side wall of the matching sealing ring being arranged with a circle of arcuate surfaces around the circumference, the arcuate surfaces being extrusion-fitted with the internal sealing ring, and the inner wall of the matching sealing ring being sealingly fitted with the valve core assembly.
[0005] As a supplement to the technical solution described in the utility model, the matching sealing ring is made of PDFE material.
[0006] As a supplement to the technical solution described in the utility model, the valve seat body includes a first seat body and a second seat body coaxially connected, a circle of slots is provided at the lower port of the first seat body, and a connecting ring inserted into the slot is provided at the upper end of the second seat body. The end face and inner wall of the first seat body are both limitedly matched with the connecting ring, the slot and the connecting ring form the annular groove, and the first flow hole is arranged on the outer wall of the second seat body.
[0007] As a supplement to the technical solution described in the utility model, the valve seat body also includes a third seat body connected to the lower part of the second seat body, the second flow hole is opened at the bottom of the third seat body, and a sealing gasket is embedded and installed on the upper end of the third seat body. The sealing gasket has a through hole aligned with the second flow hole, and the lower end of the second seat body is provided with a pressure ring, which presses the sealing gasket.
[0008] As a supplement to the technical solution described in the utility model, an installation groove for accommodating a sealing gasket is opened at the upper end of the third seat body, and a first annular step is arranged around the through hole at the upper end of the sealing gasket. The first annular step and the inner wall of the installation groove form a first annular groove, and the pressure ring is located in the first annular groove.
[0009] As a supplement to the technical solution described in the utility model, a second annular step is arranged around the through hole at the lower end of the sealing gasket, and the second annular step and the inner wall of the installation groove form a second annular groove, and a reinforced sealing ring is installed in the second annular groove.
[0010] As a supplement to the technical solution described in the utility model, the outer wall of the third seat body is provided with a first sealing groove, and a first external sealing ring is installed in the first sealing groove.
[0011] As a supplement to the technical solution described in the utility model, a second sealing groove is opened on the outer wall of the first seat body, and a second external sealing ring is installed in the second sealing groove. The inner hole diameter of the second external sealing ring is larger than the inner hole diameter of the first external sealing ring.
[0012] According to another aspect of the utility model, an electronic expansion valve is provided, and the electronic expansion valve comprises the valve seat assembly.
[0013] Beneficial effects: The utility model relates to a valve seat assembly and an electronic expansion valve, which adopts an internal sealing ring and a matching sealing ring to achieve the sealing between the valve core assembly and the chamber, the arc surface of the outer wall of the matching sealing ring is squeezed and matched with the internal sealing ring, the inner wall of the matching sealing ring is sealed and matched with the valve core assembly, and the internal sealing ring is sealed and matched with the annular groove. Compared with the traditional structure that directly adopts the sealing ring, it can greatly improve the sealing effect and prolong the service life. The utility model also has the advantages of simple structure, convenient use, low production cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model;
[0015] Figure 2 It is a schematic diagram of the structure of the utility model without the first external sealing ring and the second external sealing ring;
[0016] Figure 3 It is the installation diagram of the utility model;
[0017] Figure 4 It is a structural schematic diagram of the matching sealing ring described in the utility model;
[0018] Figure 5 It is a structural schematic diagram of the first seat body described in the utility model;
[0019] Figure 6 It is a structural schematic diagram of the second seat body described in the utility model;
[0020] Figure 7 It is a structural schematic diagram of the third seat body described in the utility model;
[0021] Figure 8 It is a structural schematic diagram of the sealing pad described in the utility model.
[0022] Illustration: 1. First seat body, 2. Second seat body, 3. Third seat body, 4. Internal sealing ring, 5. Matching sealing ring, 6. Second external sealing ring, 7. First external sealing ring, 8. Reinforced sealing ring, 9. Sealing gasket, 10. Chamber, 11. First flow hole, 12. Second flow hole, 13. Annular groove, 14. Arc surface, 15. First sealing groove, 16. Valve core assembly, 17. Through hole, 18. Connecting ring, 19. Pressing ring, 20. Slot, 21. Mounting groove, 22. First annular step, 23. Second annular step, 24. Second sealing groove. DETAILED DESCRIPTION
[0023] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.
[0024] The embodiments of the present utility model relate to a valve seat assembly and an electronic expansion valve, such as Figure 1-8As shown, it includes a valve seat body, the valve seat body has a chamber 10 for accommodating a valve core assembly 16, the side wall of the valve seat body is provided with a first flow hole 11, the bottom of the valve seat body is provided with a second flow hole 12, the first flow hole 11 and the second flow hole 12 are both connected to the chamber 10, the inner wall of the chamber 10 is provided with an annular groove 13, the inner sealing ring 4 and the matching sealing ring 5 are installed in sequence from the inside to the outside of the annular groove 13, the matching sealing ring 5 is in a circular ring shape, the outer side wall of the matching sealing ring 5 is arranged with a circle of arc surface 14 around the circumference, the arc surface 14 is squeezed and matched with the inner sealing ring 4, and the inner wall of the matching sealing ring 5 is sealed and matched with the valve core assembly 16.
[0025] The utility model adopts the cooperation of the internal sealing ring 4 and the matching sealing ring 5 to realize the sealing between the valve core assembly 16 and the chamber 10, the arc surface 14 of the outer wall of the matching sealing ring 5 is squeezed and matched with the internal sealing ring 4, the inner wall of the matching sealing ring 5 is sealed and matched with the valve core assembly 16, and the internal sealing ring 4 is sealed and matched with the annular groove 13. Compared with the traditional structure that directly adopts the sealing ring, the utility model can greatly improve the sealing effect and prolong the service life.
[0026] The matching sealing ring 5 is made of PDFE material; PDFE material is a modified material of polytetrafluoroethylene, which has excellent heat resistance, chemical corrosion resistance and electrical insulation performance.
[0027] Reference Figure 1 and Figure 2 As shown, the valve seat body comprises a first seat body 1 and a second seat body 2 that are coaxially connected, a circle of slots 20 are provided at the lower port of the first seat body 1, and a connecting ring 18 is provided at the upper end of the second seat body 2 to be inserted into the slot 20, and the end face and inner wall of the first seat body 1 are both limitedly matched with the connecting ring 18, and the slot 20 and the connecting ring 18 form the annular groove 13, and the first flow hole 11 is arranged on the outer wall of the second seat body 2; the internal sealing ring 4 and the matching sealing ring 5 are easy to install, and the internal sealing ring 4 and the matching sealing ring 5 are installed in the slot 20 of the lower port of the first seat body 1, and then the connecting ring 18 at the upper end of the second seat body 2 is inserted into the slot 20, and the internal sealing ring 4 and the matching sealing ring 5 are limited by the inner wall of the slot 20 and the matching of the connecting ring 18; the first seat body 1 and the second seat body 2 are fixed by welding.
[0028] Reference Figure 1 , Figure 2 and Figure 6As shown, the valve seat body also includes a third seat body 3 connected to the lower part of the second seat body 2, the second flow hole 12 is opened at the bottom of the third seat body 3, and a sealing gasket 9 is embedded and installed on the upper end of the third seat body 3. The sealing gasket 9 is provided with a through hole 17 aligned with the second flow hole 12, and the lower end of the second seat body 2 is provided with a pressing ring 19, which presses the sealing gasket 9; the end of the valve core assembly 16 cooperates with the sealing gasket 9 to open and close the second flow hole 12, and the sealing gasket 9 is provided to ensure the sealing effect at the second flow hole 12; the second seat body 2 and the third seat body 3 are fixed by welding.
[0029] The utility model divides the valve seat body into three parts: a first seat body 1, a second seat body 2 and a third seat body 3, which greatly reduces the processing difficulty of each part and is conducive to mass production.
[0030] Reference Figure 6-Figure 8 As shown, a mounting groove 21 for accommodating the sealing gasket 9 is opened at the upper end of the third seat body 3, and a first annular step 22 is arranged around the through hole 17 at the upper end of the sealing gasket 9. The first annular step 22 and the inner wall of the mounting groove 21 form a first annular groove, and the pressure ring 19 is located in the first annular groove; the inner wall of the mounting groove 21 and the end face of the third seat body 3 are limitedly matched with the first annular step 22, and then the sealing gasket 9 is pressed by the pressure ring 19, and at the same time, the inner wall of the mounting groove 21 will also limit the sealing gasket 9, so as to achieve the limited and tight pressing of the sealing gasket 9.
[0031] Reference Figure 6-Figure 8 As shown, a second annular step 23 is arranged around the through hole 17 at the lower end of the sealing gasket 9, and the second annular step 23 and the inner wall of the mounting groove 21 form a second annular groove, and a reinforced sealing ring 8 is installed in the second annular groove; a reinforced sealing ring 8 is added between the inner wall of the mounting groove 21 and the sealing gasket 9 to further improve the sealing effect at the second flow hole 12.
[0032] Reference Figure 1-Figure 2 As shown, the outer wall of the third seat body 3 is provided with a first sealing groove 15, and the first external sealing ring 7 is installed in the first sealing groove 15; the outer wall of the first seat body 1 is provided with a second sealing groove 24, and the second external sealing ring 6 is installed in the second sealing groove 24; during installation, the second external sealing ring 6 is installed first from bottom to top, and then the first external sealing ring 7 is installed, and the inner hole diameter of the second external sealing ring 6 is larger than the inner hole diameter of the first external sealing ring 7.
[0033] Another embodiment of the utility model provides an electronic expansion valve, and the electronic expansion valve includes the valve seat assembly.
[0034] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.
[0037] The valve seat assembly and the electronic expansion valve provided by the present application are introduced in detail above. The principles and implementation methods of the present application are explained in this article using specific examples. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A valve seat assembly, comprising a valve seat body, characterized in that: The valve seat body has a chamber (10) for accommodating a valve core assembly (16), a first flow hole (11) is provided on the side wall of the valve seat body, and a second flow hole (12) is provided on the bottom of the valve seat body. The first flow hole (11) and the second flow hole (12) are both connected to the chamber (10), and an annular groove (13) is provided on the inner wall of the chamber (10). An internal sealing ring (4) and a matching sealing ring (5) are installed in the annular groove (13) from the inside to the outside. The matching sealing ring (5) is in the shape of a circular ring, and an outer wall of the matching sealing ring (5) is arranged with a circle of arcuate surfaces (14) around the circumference. The arcuate surface (14) is squeezed and matched with the internal sealing ring (4), and the inner wall of the matching sealing ring (5) is sealed and matched with the valve core assembly (16).
2. A valve seat assembly according to claim 1, characterized in that: The matching sealing ring (5) is made of PDFE material.
3. A valve seat assembly according to claim 1, characterized in that: The valve seat body comprises a first seat body (1) and a second seat body (2) which are coaxially connected, a circle of slots (20) are provided at the lower port of the first seat body (1), a connecting ring (18) is provided at the upper end of the second seat body (2) and is inserted into the slot (20), the end face and the inner wall of the first seat body (1) are both limitedly matched with the connecting ring (18), the slot (20) and the connecting ring (18) form the annular groove (13), and the first flow hole (11) is arranged on the outer wall of the second seat body (2).
4. A valve seat assembly according to claim 3, characterized in that: The valve seat body also includes a third seat body (3) connected to the lower part of the second seat body (2); the second flow hole (12) is opened at the bottom of the third seat body (3); a sealing gasket (9) is embedded and installed at the upper end of the third seat body (3); a through hole (17) aligned with the second flow hole (12) is opened on the sealing gasket (9); a pressure ring (19) is provided at the lower end of the second seat body (2); and the pressure ring (19) presses the sealing gasket (9).
5. A valve seat assembly according to claim 4, characterized in that: The upper end of the third seat body (3) is provided with a mounting groove (21) for accommodating the sealing gasket (9); the upper end of the sealing gasket (9) is provided with a first annular step (22) around the through hole (17); the first annular step (22) and the inner wall of the mounting groove (21) form a first annular groove; the pressure ring (19) is located in the first annular groove.
6. A valve seat assembly according to claim 5, characterized in that: A second annular step (23) is arranged at the lower end of the sealing gasket (9) around the through hole (17). The second annular step (23) and the inner wall of the installation groove (21) form a second annular groove. A reinforced sealing ring (8) is installed in the second annular groove.
7. A valve seat assembly according to claim 4, characterized in that: The outer wall of the third seat body (3) is provided with a first sealing groove (15), and a first external sealing ring (7) is installed in the first sealing groove (15).
8. A valve seat assembly according to claim 7, characterized in that: The outer wall of the first seat body (1) is provided with a second sealing groove (24), in which a second external sealing ring (6) is installed, and the inner hole diameter of the second external sealing ring (6) is larger than the inner hole diameter of the first external sealing ring (7).
9. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve seat assembly as claimed in any one of claims 1 to 8.