Electronic expansion valve
By adopting a combined structure of valve core structural parts and conical guide grooves in the electronic expansion valve, the problems of rolling structure and sealing method are solved, better sealing effect and smooth movement, and the performance and cost-effectiveness of the equipment are improved.
Patent Information
- Application Number
- CN202421717394.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-19
AI Technical Summary
The existing electronic expansion valves have problems such as high cost, large resistance and poor sealing effect in rolling structure and sealing mode, which affects their performance and cost-effectiveness.
The combined structure of valve core structural parts, upper valve seat, lower valve seat, sealing ring, guide sleeve connection assembly, magnetic rotor component, sleeve and connecting seat is adopted. The configuration of conical guide grooves and balls and spring pads improves the sealing effect and movement smoothness.
It effectively improves the airtight effect of the sealing ring, improves the smoothness and stability of the valve core structural parts, reduces wear between components, extends service life, and solves the problem of high bearing costs.
Smart Images
Figure CN222864158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve. Background Art
[0002] In the field of refrigeration and heating, electronic expansion valves are usually used to regulate the flow of fluids. Electronic expansion valves are usually composed of structures such as valve seat components and drive components. The valve seat components include valve core components, guide sleeve connection components, and upper valve seats, lower valve seats, sealing blocks and other parts. The lower valve seat and the lower valve core have valve ports. The opening of the valve port is adjusted by moving the valve stem component to achieve flow regulation and switch control.
[0003] However, the electronic expansion valve in the prior art has some defects. First, in terms of rolling structure, a bearing method is usually adopted. Although this method has less resistance and is conducive to the movement of the valve stem, the cost is too high, which increases the overall manufacturing cost of the electronic expansion valve. Second, the sealing method is a plane seal, which has a poor sealing effect; the consistency is poor, and it is difficult to ensure that the expansion valve can achieve stable and reliable sealing performance, which affects the working efficiency and quality of the electronic expansion valve to a certain extent.
[0004] In summary, the electronic expansion valves currently on the market have problems in rolling structure and sealing method that need to be improved and optimized in order to improve their performance and cost-effectiveness. Utility Model Content
[0005] In view of this, the utility model proposes an electronic expansion valve to solve the above technical problems.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] An electronic expansion valve comprises a valve core structure, an upper valve seat, a lower valve seat, a sealing ring, a guide sleeve connecting assembly, a magnetic rotor component, a sleeve and a connecting seat, the lower end of the upper valve seat is fixedly connected to the upper end of the lower valve seat, a sealing ring is provided on the inner circumference of the connecting surface between the upper valve seat and the lower valve seat, the lower end of the connecting seat is fixedly connected to the upper end of the upper valve seat, the lower end of the guide sleeve connecting assembly is fixedly penetrated by the upper end of the connecting seat, a sleeve is fixedly provided on the upper end surface of the connecting seat, a magnetic rotor component is rotatably provided in the sleeve, the upper valve seat, the lower valve seat, the connecting seat, the guide sleeve connecting assembly, the magnetic rotor component and the sleeve together form a valve cavity, the valve core structure is assembled in the valve cavity, and the sealing ring has a conical guide groove that cooperates with the lower end of the valve core structure.
[0008] To better implement the above scheme, optionally, the valve core structure includes an upper valve core, a lower valve core, a valve stem assembly, a valve needle elastic mechanism, a valve needle, a valve core sleeve, a valve needle sleeve, a valve core spring, a ball and a spring flat washer. The valve core sleeve is fixedly assembled on the upper end of the upper valve core, and the lower valve core is fixedly assembled on the lower end of the upper valve core. The upper end of the valve stem assembly is rotatably penetrated by a guide sleeve connecting component and is matched with the threaded rotation and lifting of the magnetic rotor component. The lower outer wall of the valve stem assembly is matched with the inner wall of the valve core sleeve clearance, and the valve needle sleeve is fixed on the valve stem. The opening part of the inner cavity of the valve stem assembly, the inner cavity of the valve stem assembly is axially equipped with a valve needle elastic mechanism, the center hole of the valve needle sleeve is slidably provided with a valve needle, the upper end of the valve needle extends into the inner cavity of the valve stem assembly and presses against the lower end of the valve needle elastic mechanism, the valve core spring sleeve is arranged on the valve stem assembly, the ball is multiple and movably nested in the upper end surface of the valve core sleeve around the valve stem assembly, the spring flat washer is movably sleeved on the outer wall of the valve stem assembly and a rotatable cover is arranged on the upper end surface of the valve core sleeve, and the lower end of the valve core spring presses against the upper part of the spring flat washer.
[0009] To better implement the above solution, optionally, the depth of the placement groove is between the radius and diameter of the ball.
[0010] Optionally, the lower end surface of the spring flat washer is provided with an annular groove, and the upper part of the ball can be rotatably disposed in the annular groove.
[0011] Optionally, the depth of the annular groove is smaller than the radius of the ball.
[0012] Optionally, there is a gap between the upper end surface of the valve core sleeve and the lower end surface of the spring flat washer.
[0013] Optionally, a first flow channel is radially opened on the guide sleeve of the guide sleeve connecting assembly.
[0014] Optionally, a second flow channel is opened in the radial direction of the valve core sleeve.
[0015] Optionally, a third flow channel is opened at the lower portion of the upper valve core parallel to the axial direction of the upper valve core, and a fourth flow channel is opened at the lower valve core parallel to the axial direction of the lower valve core, and the third flow channel is connected to the fourth flow channel.
[0016] Beneficial effects of the utility model:
[0017] The utility model discloses an electronic expansion valve. During the valve closing process, when the lower end of the valve core structure contacts the sealing ring and the valve core structure continues to move downward, the conical guide groove can effectively correct and guide the valve core structure, thereby improving the airtight effect of the sealing ring.
[0018] The utility model discloses an electronic expansion valve, in which the valve core structure is provided with a ball and a spring flat washer, so that when the valve stem assembly is rotating and lifting, the spring flat washer can be rotatably placed on the upper end surface of the valve core sleeve, thereby effectively solving the problem of stagnation and inability to drive during the movement caused by the resistance generated when the valve stem assembly is rotating and lifting, significantly improving the smoothness and stability of the movement of the electronic expansion valve valve core structure, greatly reducing the wear between components, and extending the service life of the electronic expansion valve valve core structure. At the same time, the electronic expansion valve valve core structure has a simple structure, which effectively solves the problem of high cost caused by the existing use of bearings.
[0019] The utility model discloses an electronic expansion valve, which utilizes the first flow channel, the second flow channel, the third flow channel, the fourth flow channel and the fifth flow channel to connect the magnetic rotor cavity, the inner cavity of the valve stem assembly, the small valve port and the large valve port to each other, thereby effectively balancing the pressure of the magnetic rotor cavity, the inner cavity of the valve stem assembly, the small valve port and the large valve port, avoiding the problem of airtightness caused by pressure difference, thereby ensuring the sealing performance of the electronic expansion valve. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a cross-sectional view of an electronic expansion valve according to Embodiment 1 of the present utility model;
[0021] Figure 2 yes Figure 1 The enlarged view of point A in the middle;
[0022] Figure 3 It is a three-dimensional schematic diagram of a valve core structure in an electronic expansion valve according to Embodiment 2 of the present utility model;
[0023] Figure 4 yes Figure 3 Cross-sectional view (the valve core is in the closed state);
[0024] Figure 5 yes Figure 3 Cross-sectional view (the valve core is in the open state);
[0025] Figure 6 yes Figure 3 A three-dimensional schematic diagram of the structure of the middle part;
[0026] Figure 7 It is a cross-sectional view of an electronic expansion valve according to Embodiment 3 of the present utility model;
[0027] Figure 8 yes Figure 7 A cross-sectional view of the middle valve core structure;
[0028] Reference numerals:
[0029] Valve core structural component 100, upper valve core 110, third flow channel 111, lower valve core 120, fourth flow channel 121, small valve port 122, valve stem assembly 130, fifth flow channel 131, valve needle elastic mechanism 140, valve needle 150, valve core sleeve 160, placement groove 161, second flow channel 162, valve needle sleeve 170, valve core spring 180, ball 191, spring flat washer 192, annular groove 193, upper valve seat 200, lower valve seat 300, large valve port 301, sealing ring 400, conical guide groove 401, guide sleeve connecting assembly 500, guide sleeve 510, first flow channel 511, magnetic rotor component 600, sleeve 700, connecting seat 800. DETAILED DESCRIPTION
[0030] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments, wherein the same components are represented by the same reference numerals.
[0031] Example 1
[0032] See also Figure 1 to Figure 2 An embodiment of the utility model provides an electronic expansion valve, including a valve core structure 100, an upper valve seat 200, a lower valve seat 300, a sealing ring 400, a guide sleeve connecting assembly 500, a magnetic rotor component 600, a sleeve 700 and a connecting seat 800.
[0033] The lower end of the upper valve seat 200 is fixedly connected to the upper end of the lower valve seat 300, and a sealing ring 400 is provided on the inner circumference of the connecting surface between the upper valve seat 200 and the lower valve seat 300. The lower end of the connecting seat 800 is fixedly connected to the upper end of the upper valve seat 200, and the lower end of the guide sleeve connecting assembly 500 is fixedly penetrated through the upper end of the connecting seat 800. A sleeve 700 is fixedly provided on the upper end surface of the connecting seat 800, and a magnetic rotor component 600 is rotatably provided in the sleeve 700. The upper valve seat 200, the lower valve seat 300, the connecting seat 800, the guide sleeve connecting assembly 500, the magnetic rotor component 600 and the sleeve 700 together form a valve cavity, and the valve core structure 100 is assembled in the valve cavity. The sealing ring 400 has a conical guide groove 401 that cooperates with the lower end of the valve core structure 100.
[0034] In the embodiment of the present utility model, it should be noted that this embodiment only improves the structure of the sealing ring 400, and the remaining structures are all existing technologies, and the specific structures will not be repeated.
[0035] In the embodiment of the present utility model, the conical guide groove 401 cooperates with the lower end of the lower valve core 120 of the valve core structure 100 .
[0036] During the closing process of the electronic expansion valve of the embodiment of the utility model, when the lower valve body 120 of the valve core structure 100 contacts the sealing ring 400 and the valve core structure 100 continues to move downward, the conical guide groove 401 can effectively correct and guide the lower valve core 120, thereby improving the airtight effect of the sealing ring 400.
[0037] Example 2
[0038] See also Figures 3 to 6 This embodiment further improves the valve core structure 100 in embodiment 1. Specifically, the valve core structure 100 includes an upper valve core 110, a lower valve core 120, a valve stem assembly 130, a valve needle elastic mechanism 140, a valve needle 150, a valve core sleeve 160, a valve needle sleeve 170, a valve core spring 180, a ball 191 and a spring flat washer 192.
[0039] like Figure 3 and Figure 4 As shown, the valve core sleeve 160 is fixedly assembled on the upper end of the upper valve core 110, the lower valve core 120 is fixedly assembled on the lower end of the upper valve core 110, the lower outer wall of the valve stem assembly 130 is clearance-matched with the inner wall of the valve core sleeve 160, the valve needle sleeve 170 is fixedly arranged at the opening of the inner cavity of the valve stem assembly 130, the inner cavity of the valve stem assembly 130 is axially equipped with a valve needle elastic mechanism 140, the center hole of the valve needle sleeve 170 is slidably equipped with a valve needle 150, and the upper The end extends into the inner cavity of the valve stem assembly 130 and presses against the lower end of the valve needle elastic mechanism 140. The valve core spring 180 is sleeved on the valve stem assembly 130. There are multiple balls 191 and they are movably nested in the upper end surface of the valve core sleeve 160 around the valve stem assembly 130. The spring flat washer 192 is movably sleeved on the outer wall of the valve stem assembly 130 and the rotatable cover is arranged on the upper end surface of the valve core sleeve 160. The lower end of the valve core spring 180 presses against the upper part of the spring flat washer 192.
[0040] like Figure 3 and Figure 4As shown, in the embodiment of the present utility model, there are three balls 191, and the upper end surface of the valve core sleeve 160 is provided with a placement groove 161 corresponding to the ball 191 one by one, and each ball 191 is placed in the corresponding placement groove 161. Specifically, the three placement grooves 161 are evenly distributed on the upper end surface of the valve core sleeve 160, and the depth of each placement groove 161 is between the radius and the diameter of the ball 191. The lower end surface of the spring flat washer 192 is provided with an annular groove 193, and the depth of the annular groove 193 is less than the radius of the ball 191. The upper part of the ball 191 can be rotatably arranged in the annular groove 19 3, there is a gap between the upper end surface of the valve core sleeve 160 and the lower end surface of the spring flat washer 192, and the width of the gap is 0.06mm-0.5mm. The placement groove 161 can limit the ball 191 to prevent the ball 191 from leaving the valve core sleeve 160, and the annular groove 193 can limit the spring flat washer 192 to ensure that the spring flat washer 192 can only rotate around the annular groove 193. The gap between the upper end surface of the valve core sleeve 160 and the lower end surface of the spring flat washer 192 can prevent the valve core sleeve 160 from contacting the spring flat washer 192 and increasing the rotation resistance.
[0041] An electronic expansion valve according to an embodiment of the utility model, the valve core structure is configured with a ball 191 and a spring flat washer 192, so that the valve stem assembly 130 can be rotated and lifted while the spring flat washer 192 is rotatably placed on the upper end surface of the valve core sleeve 160, effectively solving the problem of sticking and being unable to drive during the movement caused by the resistance generated during the rotation and lifting of the valve stem assembly 130, significantly improving the smoothness and stability of the movement of the valve core structure, greatly reducing the wear between components, and extending the service life of the valve core structure 100. At the same time, the valve core structure 100 has a simple structure, which effectively solves the problem of high cost caused by the existing use of bearings.
[0042] Example 3
[0043] like Figure 7 and Figure 8 As shown, this embodiment is further improved based on embodiment 2, and the improvement is:
[0044] A first flow channel 511 is radially opened on the guide sleeve 510 in the guide sleeve connecting assembly 500. There are four first flow channels 511, which are circumferentially spaced around the outer ring surface of the guide sleeve 510. The first flow channels 511 are straight hole structures. The provision of the first flow channels 511 can make the inside and outside of the guide sleeve 510 conductive, thereby making the internal and external pressures of the guide sleeve 510 approach equilibrium.
[0045] like Figure 8As shown, a second flow channel 162 is opened in the radial direction of the valve core sleeve 160, and there are three second flow channels 162 that are circumferentially spaced around the outer ring surface of the valve core sleeve 160. The second flow channel 162 is a straight hole structure. The provision of the second flow channel 162 can increase the connecting area between the upper cavity and the lower cavity of the valve core sleeve 160, thereby helping to make the pressure of the upper cavity and the lower cavity of the valve core sleeve 160 approach balance.
[0046] like Figure 8 As shown, a third flow channel 111 is opened in the lower part of the upper valve core 110 parallel to the axial direction of the upper valve core 110, and a fourth flow channel 121 is opened in the lower valve core 120 parallel to the axial direction of the lower valve core 120, and the third flow channel 111 is connected with the fourth flow channel 121. Specifically, the third flow channel 111 and the fourth flow channel 121 are two through holes. The third flow channel 111 and the fourth flow channel 121 can be used to connect the cavity above the upper valve core 110, the cavity inside the lower valve core 120, and the cavity below the lower valve core 120.
[0047] In the embodiment of the utility model, it should be noted that the lower valve core 120 has a small valve port 122, which is actually a cavity inside the lower valve core 120, and the lower valve seat 300 has a large valve port 301, which is actually a cavity below the lower valve core 120. The small valve port 122 and the large valve port 301 are connected and closed to each other through the valve needle 150, and the valve stem assembly 130 has a fifth flow channel 131. The fifth flow channel 131 can make the inside and outside of the valve stem assembly 130 conductive, thereby making the pressure inside and outside the valve stem assembly 130 approach to balance.
[0048] like Figure 7 As shown, in the embodiment of the utility model, it should be noted that the cavity enclosed by the connecting seat 800, the guide sleeve connecting assembly 500, the magnetic rotor component 600, the sleeve 700, and the valve stem assembly 130 is the magnetic rotor cavity.
[0049] An electronic expansion valve according to an embodiment of the utility model can connect the magnetic rotor cavity, the inner cavity of the valve stem assembly 130, the small valve port 122 and the large valve port 301 to each other by means of the first flow channel 511, the second flow channel 162, the third flow channel 111, the fourth flow channel 121 and the fifth flow channel 131, thereby effectively balancing the pressures of the magnetic rotor cavity, the inner cavity of the valve stem assembly 130, the small valve port 122 and the large valve port 301, avoiding the problem of airtightness caused by pressure difference, and thus ensuring the sealing performance of the electronic expansion valve.
[0050] The technical solution of the utility model is described in detail above in combination with specific embodiments, and the described specific embodiments are used to help understand the concept of the utility model. Derivations and variations made by those skilled in the art based on the specific embodiments of the utility model also fall within the protection scope of the utility model.
Claims
1. An electronic expansion valve, comprising a valve core structure (100), an upper valve seat (200), a lower valve seat (300), a sealing ring (400), a guide sleeve connecting assembly (500), a magnetic rotor component (600), a sleeve (700) and a connecting seat (800), wherein the lower end of the upper valve seat (200) is fixedly connected to the upper end of the lower valve seat (300), a sealing ring (400) is provided on the inner circumference of the connecting surface between the upper valve seat (200) and the lower valve seat (300), and the lower end of the connecting seat (800) is connected to the upper valve seat (200). ), the lower end of the guide sleeve connecting assembly (500) is fixedly connected to the upper end of the connecting seat (800), the upper end surface of the connecting seat (800) is fixedly provided with a sleeve (700), and a magnetic rotor component (600) is rotatably provided in the sleeve (700), the upper valve seat (200), the lower valve seat (300), the connecting seat (800), the guide sleeve connecting assembly (500), the magnetic rotor component (600) and the sleeve (700) together form a valve cavity, and the valve core structure (100) is assembled in the valve cavity, characterized in that: The sealing ring (400) has a conical guide groove (401) that matches the lower end of the valve core structure (100).
2. An electronic expansion valve according to claim 1, characterized in that: The valve core structure (100) includes an upper valve core (110), a lower valve core (120), a valve stem assembly (130), a valve needle elastic mechanism (140), a valve needle (150), a valve core sleeve (160), a valve needle sleeve (170), a valve core spring (180), a ball (191) and a spring flat washer (192). The valve core sleeve (160) is fixedly assembled on the upper end of the upper valve core (110), and the lower valve core (120) is fixedly assembled on the lower end of the upper valve core (110). The upper end of the valve stem assembly (130) is rotatably provided with a guide sleeve connecting component (500) and is threadably rotated and lifted with the magnetic rotor component (600). The lower outer wall of the valve stem assembly (130) is clearance-matched with the inner wall of the valve core sleeve (160). The valve needle sleeve (170) is fixedly mounted on the valve stem. The valve stem assembly (130) has an opening in the inner cavity, the inner cavity of the valve stem assembly (130) is axially provided with a valve needle elastic mechanism (140), the center hole of the valve needle sleeve (170) is slidably provided with a valve needle (150), the upper end of the valve needle (150) extends into the inner cavity of the valve stem assembly (130) and presses against the lower end of the valve needle elastic mechanism (140), the valve core spring (180) is sleeved on the valve stem assembly (130), the ball bearings (191) are multiple and are movably nested in the upper end surface of the valve core sleeve (160) around the valve stem assembly (130), the spring flat washer (192) is movably sleeved on the outer wall of the valve stem assembly (130) and a rotatable cover is provided on the upper end surface of the valve core sleeve (160), and the lower end of the valve core spring (180) presses against the upper part of the spring flat washer (192).
3. An electronic expansion valve according to claim 2, characterized in that: There are three balls (191), and the upper end surface of the valve core sleeve (160) is provided with placement grooves (161) corresponding to the balls (191) one by one.
4. An electronic expansion valve according to claim 3, characterized in that: The depth of the placement groove (161) is between the radius and diameter of the ball (191).
5. An electronic expansion valve according to claim 4, characterized in that: The lower end surface of the spring flat washer (192) is provided with an annular groove (193), and the upper part of the ball (191) is rotatably arranged in the annular groove (193).
6. An electronic expansion valve according to claim 5, characterized in that: The depth of the annular groove (193) is smaller than the radius of the ball (191).
7. An electronic expansion valve according to claim 6, characterized in that: There is a gap between the upper end surface of the valve core sleeve (160) and the lower end surface of the spring flat washer (192).
8. An electronic expansion valve according to claim 2, characterized in that: The guide sleeve (510) in the guide sleeve connection assembly (500) is provided with a first flow channel (511) in the radial direction.
9. An electronic expansion valve according to claim 8, characterized in that: The valve core sleeve (160) is provided with a second flow channel (162) in the radial direction.
10. An electronic expansion valve according to claim 9, characterized in that: A third flow channel (111) is opened at the lower part of the upper valve core (110) parallel to the axial direction of the upper valve core (110), and a fourth flow channel (121) is opened at the lower valve core (120) parallel to the axial direction of the lower valve core (120), and the third flow channel (111) is connected to the fourth flow channel (121).