Electronic expansion valve element structural part

Abstract

The utility model discloses a valve core structural member of an electronic expansion valve, which comprises an upper valve core, a lower valve core, a valve rod 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 gasket, the valve core sleeve is fixedly assembled at the upper end of the upper valve core, and the outer wall of the lower part of the valve rod assembly is in clearance fit with the inner wall of the valve core sleeve; the valve element spring is arranged on the valve rod assembly in a sleeving mode, the balls are movably embedded in the upper end face of the valve element sleeve around the valve rod assembly, the spring flat gasket is movably arranged on the outer wall of the valve rod assembly in a sleeving mode and rotatably covers the upper end face of the valve element sleeve, and the lower end of the valve element spring abuts against the upper portion of the spring flat gasket. According to the valve element structural part, the ball and the spring flat gasket are arranged, so that the spring flat gasket can be rotationally placed on the upper end face of the valve element sleeve in the rotating and lifting process of the valve rod assembly; and the phenomena of clamping stagnation and incapability of driving in the action process caused by resistance generated when the valve rod assembly rotates and ascends and descends are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to a valve core structural component of 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. However, electronic expansion valves in the prior art have some defects. For example, the valve core structural parts usually adopt a bearing method in terms of rolling structure. 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, and the assembly is more complicated.

[0003] In summary, the electronic expansion valves currently on the market have problems in their rolling structures that need to be improved and optimized in order to improve their performance and cost-effectiveness. Utility Model Content

[0004] In view of this, the utility model proposes an electronic expansion valve valve core structure to solve the above technical problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An electronic expansion valve valve core structure, comprising 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 and a valve core spring, wherein the valve core sleeve is fixedly assembled on the upper end of the upper valve core, the lower valve core is fixedly assembled on the lower end of the upper valve core, the lower outer wall of the valve stem assembly and the inner wall of the valve core sleeve are clearance-matched, the valve needle sleeve is fixedly arranged on the opening 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, and the valve core sleeve is fixedly arranged on the inner cavity of the valve stem assembly. A valve needle is slidably provided in the center hole of the valve needle sleeve, and 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 and also includes a ball and a spring flat washer. The ball is in plurality and is 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. The lower end of the valve core spring presses against the upper part of the spring flat washer.

[0007] To better implement the above solution, optionally, there are three balls, and the upper end surface of the valve core sleeve is provided with placement grooves corresponding to the balls one by one.

[0008] Optionally, a plurality of placement grooves are evenly distributed on the upper end surface of the valve core sleeve.

[0009] 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] Beneficial effects of the utility model:

[0014] The utility model discloses an electronic expansion valve core structure component, which can make the spring flat washer rotatably placed on the upper end surface of the valve core sleeve during the rotation and lifting of the valve stem assembly by configuring a ball and a spring flat washer, thereby effectively solving the problem of stagnation and inability to drive during the movement caused by the resistance generated when the valve stem assembly rotates and lifts, significantly improving the smoothness and stability of the movement of the electronic expansion valve core structure component, greatly reducing the wear between components, and extending the service life of the electronic expansion valve core structure component. At the same time, the electronic expansion valve core structure component has a simple structure, which effectively solves the problem of high cost caused by the existing use of bearings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of a valve core structure of an electronic expansion valve in Embodiment 1 of the utility model;

[0016] Figure 2 yes Figure 1 Cross-sectional view (the valve core is in the closed state);

[0017] Figure 3 yes Figure 1 Cross-sectional view (the valve core is in the open state);

[0018] Figure 4 yes Figure 1 A three-dimensional schematic diagram of the partial structure of the middle valve core structure.

[0019] Reference numerals:

[0020] The electronic expansion valve valve core structure 100, the upper valve core 110, the lower valve core 120, the valve stem assembly 130, the valve needle elastic mechanism 140, the valve needle 150, the valve core sleeve 160, the placement groove 161, the valve needle sleeve 170, the valve core spring 180, the ball 191, the spring flat washer 192, and the annular groove 193. DETAILED DESCRIPTION

[0021] 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.

[0022] Example 1

[0023] See also Figures 1 to 4 The embodiment of the utility model discloses an electronic expansion valve valve core structure 100, including 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.

[0024] like Figure 1 and Figure 2 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.

[0025] like Figure 3 and Figure 4As shown, in the embodiment of the 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 193. 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 is set to limit the ball 191 to prevent the ball 191 from escaping from the valve core sleeve 160. The annular groove 193 is set to limit the spring washer 192 to ensure that the spring washer 192 can only rotate around the annular groove 193. There is a gap between the upper end surface of the valve core sleeve 160 and the lower end surface of the spring washer 192 to prevent the valve core sleeve 160 from contacting the spring washer 192 and increasing the rotation resistance.

[0026] An electronic expansion valve core structure of an embodiment of the utility model is configured with a ball 191 and a spring flat washer 192, so that the spring flat washer 192 can be rotatably placed on the upper end surface of the valve core sleeve 160 during the rotation and lifting of the valve stem assembly 130, effectively solving the problem of jamming and inability to drive during the movement caused by the resistance generated by the valve stem assembly 130 during the rotation and lifting movement, significantly improving the smoothness and stability of the movement of the electronic expansion valve core structure, greatly reducing the wear between components, and extending the service life of the electronic expansion valve core structure. At the same time, the electronic expansion valve core structure 100 has a simple structure, which effectively solves the problem of high cost caused by the existing use of bearings.

[0027] 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 valve core structure (100), comprising 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) and a valve core spring (180), wherein 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), and the lower outer wall of the valve stem assembly (130) is connected to the valve core sleeve (180). The inner wall clearance of the valve stem assembly (160) is matched, 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 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), and is characterized in that: It also includes a ball (191) and a spring washer (192), wherein the ball (191) is in plurality and is movably nested around the valve stem assembly (130) on the upper end surface of the valve core sleeve (160), the spring washer (192) is movably sleeved on the outer wall of the valve stem assembly (130) and a rotatable cover is arranged on the upper end surface of the valve core sleeve (160), and the lower end of the valve core spring (180) is pressed against the upper part of the spring washer (192).

2. The electronic expansion valve core structure (100) according to claim 1, 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.

3. The electronic expansion valve core structure (100) according to claim 2, characterized in that: A plurality of placement grooves (161) are evenly distributed on the upper end surface of the valve core sleeve (160).

4. The electronic expansion valve core structure (100) 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. The electronic expansion valve core structure (100) according to claim 3, 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. The electronic expansion valve core structure (100) according to claim 5, characterized in that: The depth of the annular groove (193) is smaller than the radius of the ball (191).

7. The electronic expansion valve core structure (100) 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).

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