Electronic expansion valve and refrigeration apparatus

Abstract

The utility model discloses an electronic expansion valve and refrigeration plant relates to electronic expansion valve technical field, wherein, electronic expansion valve includes valve seat, valve core and elastic sealing member, valve seat is equipped with the export, valve core is movable and is arranged in valve seat, to block or open export, valve core has the free end for with the mouth rim of export abuts, elastic sealing member is located on the free end of valve core or mouth rim. The technical scheme provided by the utility model can reduce the wear and tear of valve core and valve seat, and improve the sealing effect of valve seat opening.

Description

Technical Field

[0001] This utility model relates to the field of electronic expansion valve technology, and in particular to an electronic expansion valve and a refrigeration device. Background Technology

[0002] As a new type of control element, the electronic expansion valve has long since broken through the concept of a throttling mechanism. It is an important link in the intelligence of refrigeration systems, an important means and guarantee for the true realization of refrigeration system optimization, and a symbol of the electromechanical integration of refrigeration systems. It has been applied in more and more fields.

[0003] Currently, electronic expansion valves on the market generally achieve sealing by increasing the interference fit between the valve core and the valve seat. However, after long-term use, this can easily lead to wear on the contact surfaces of the valve core and the valve seat, resulting in poor sealing of the valve seat opening and excessive internal leakage. Utility Model Content

[0004] The main purpose of this invention is to provide an electronic expansion valve and a refrigeration device, which aims to reduce the wear of the valve core and valve seat while improving the sealing effect of the valve seat opening.

[0005] To achieve the above objectives, the electronic expansion valve proposed in this utility model includes:

[0006] Valve seat, the valve seat having an outlet;

[0007] A valve core, movably disposed within the valve seat to block or open the outlet, the valve core having a free end for abutting against the edge of the outlet; and

[0008] An elastic seal is provided at the free end of the valve core or on the valve rim.

[0009] In one embodiment, the free end of the valve core has a sealing surface with a conical shape, the sealing surface being used to abut against the edge of the outlet.

[0010] In one embodiment, the rim is provided as an arc surface.

[0011] In one embodiment, the resilient seal is disposed on the sealing surface.

[0012] In one embodiment, the resilient seal engages with the sealing surface.

[0013] In one embodiment, the resilient seal is bonded to the sealing surface.

[0014] In one embodiment, the wall thickness h of the resilient seal ranges from 0.2 mm to 1 mm.

[0015] In one embodiment, the valve seat has a sealing end face that is perpendicular to the movement direction of the valve core, and the orifice is formed between the sealing end face and the inner peripheral wall of the outlet, wherein the sealing end face and the inner peripheral face are tangentially transitioned to the orifice.

[0016] In one embodiment, the radius r of the rim ranges from 0.2 mm to 1 mm.

[0017] In one embodiment, the cone angle α of the sealing surface ranges from 60° to 90°.

[0018] In one embodiment, the resilient seal is made of rubber.

[0019] In one embodiment, the material of the resilient seal also includes glass fiber or carbon fiber.

[0020] This utility model also proposes a refrigeration device, including the aforementioned electronic expansion valve.

[0021] The technical solution of this utility model involves setting an elastic sealing element on the free end or edge of the valve core. When the valve core blocks the outlet, the elastic sealing element can press against the free end and edge of the valve core. On one hand, the elastic force of the sealing element can buffer the valve core, preventing hard contact between the valve core and the valve seat, thus avoiding wear and internal leakage, and ensuring the performance of the electronic expansion valve. On the other hand, the elastic sealing element can be squeezed by the free end and edge of the valve core, causing elastic deformation, which fills the microscopic unevenness (such as machining scratches or tiny gaps) between the free end and edge of the valve core, forming a continuous sealing line, thereby increasing the sealing effect of the valve seat outlet. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A cross-sectional structural schematic diagram of an embodiment of the electronic expansion valve provided by this utility model;

[0024] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0025] Figure 3 A schematic diagram of the valve core and elastic sealing element of the electronic expansion valve provided by this utility model.

[0026] Explanation of icon numbers:

[0027] 10. Electronic expansion valve; 100. Valve seat; 110. Outlet; 111. Flange; 112. Inner peripheral wall; 120. Sealing end face; 200. Valve core; 210. Sealing surface; 300. Elastic seal.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0030] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0031] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] As a new type of control element, the electronic expansion valve has long since broken through the concept of a throttling mechanism. It is an important link in the intelligence of refrigeration systems, an important means and guarantee for the true realization of refrigeration system optimization, and a symbol of the electromechanical integration of refrigeration systems. It has been applied in more and more fields.

[0033] Currently, electronic expansion valves on the market generally achieve sealing by increasing the interference fit between the valve core and the valve seat. However, after long-term use, this can easily lead to wear on the contact surfaces of the valve core and the valve seat, resulting in poor sealing of the valve core blocking the valve seat opening and causing excessive internal leakage.

[0034] To address the aforementioned technical problems, this utility model proposes an electronic expansion valve 10. This utility model can be applied not only to vehicle refrigeration systems but also to refrigeration equipment such as household air conditioners.

[0035] Please see Figures 1 to 3 In one embodiment of the present invention, the electronic expansion valve 10 includes a valve seat 100, a valve core 200, and an elastic sealing element 300. The valve seat 100 is provided with an outlet 110. The valve core 200 is movably disposed within the valve seat 100 to block or open the outlet 110. The valve core 200 has a free end for abutting against the edge 111 of the outlet 110. The elastic sealing element 300 is disposed on the free end of the valve core 200 or on the edge 111.

[0036] The technical solution of this utility model involves providing an elastic sealing element 300 on the free end or edge 111 of the valve core 200. When the valve core 200 blocks the outlet 110, the elastic sealing element 300 can press against the free end and edge 111 of the valve core 200. On one hand, the elastic force of the elastic sealing element 300 can buffer the valve core 200, preventing hard contact between the valve core 200 and the valve seat 100, thus avoiding wear between the valve core 200 and the valve seat 100, and consequently preventing internal leakage, ensuring the performance of the electronic expansion valve 10. On the other hand, the elastic sealing element 300 can be squeezed by the free end and edge 111 of the valve core 200, causing elastic deformation, which fills the microscopic unevenness (such as machining scratches or tiny gaps) between the free end and edge 111 of the valve core 200, forming a continuous sealing line, thereby improving the sealing effect of the valve core 200 blocking the opening of the valve seat 100.

[0037] The electronic expansion valve 10 includes a single-valve electronic expansion valve 10 and a dual-valve electronic expansion valve 10. The electronic expansion valve 10 proposed in this solution is a dual-valve electronic expansion valve 10. The valve core 200 is a large valve needle, which has a moving channel and a small valve port. The small valve port is located on the free end face of the large valve needle. The small valve needle is movably disposed within the moving channel to open or close the small valve port. The free end face of the large valve needle is used to seal the opening on the valve seat 100. However, this solution is not limited to this; in other embodiments, the electronic expansion valve 10 proposed in this solution can be a single-valve electronic expansion valve 10.

[0038] It is understandable that the large valve needle is the main valve, with a longer stroke, responsible for regulating flow over a wide range. The small valve needle is the auxiliary valve, with a shorter stroke, responsible for fine-tuning flow over a narrower range. The large and small valve needles work in coordination to achieve high-precision flow regulation.

[0039] Optionally, in this embodiment, the free end of the valve core 200 has a sealing surface 210 with a conical shape, which abuts against the edge 111 of the outlet 110. It is understood that the slope of the conical surface allows the valve core 200 to slightly offset during assembly, relying on its geometric shape to automatically correct the center, ensuring uniform contact of the sealing surface 210 and reducing installation accuracy requirements. Furthermore, when the conical surface contacts the edge 111, the internal fluid pressure pushes the conical surface to fit further, creating a "tighter and tighter" effect, significantly improving sealing performance under high pressure. Of course, this solution is not limited to this. In other embodiments, the outer periphery of the free end face of the valve core 200 has an arc-shaped sealing surface 210, which abuts against the edge 111 of the outlet 110 for sealing.

[0040] Furthermore, in this embodiment, the flange 111 is arc-shaped, and the sealing surface is conical. It can be understood that the fit between the conical and arc-shaped surfaces is a line contact seal. On the one hand, compared to a planar seal, a line contact seal provides a tighter seal and reduces leakage. On the other hand, even if the sealing surface has errors due to machining, the arc-shaped surface can still make good contact with the conical surface, thereby reducing the impact of machining errors on the sealing effect of the valve core 200 and the valve seat 100. Of course, this solution is not limited to this. In the second embodiment, the flange 111 can also be conical, and the sealing surface can be arc-shaped. Of course, this solution is not limited to this. In the third embodiment, the flange 111 can also be conical, and the sealing surface can also be conical. Of course, this solution is not limited to this. In the fourth embodiment, the sealing mating surface can also be set in a plane. That is, the end face of the valve core 200 is set in a plane and the opening edge 111 is set in a conical surface. Thus, when the valve core 200 blocks the opening, the connection position between the free end plane of the valve core 200 and the outer peripheral surface of the valve core 200, that is, the contact line between the free end plane of the valve core 200 and the outer peripheral surface of the valve core 200, and the conical surface of the opening edge 111 contact to achieve line contact sealing. Of course, this solution is not limited to this. In the fifth embodiment, the edge 111 can also be planar, that is, the end face of the outlet 110 facing the valve core 200 is planar, and the sealing surface 210 is conical. Thus, when the valve core 200 blocks the opening, the contact line between the plane of the end face of the outlet 110 facing the valve core 200 and the inner circumferential surface of the outlet 110, that is, the contact line between the plane of the end face of the outlet 110 facing the valve core 200 and the inner circumferential surface of the outlet 110, contacts the conical sealing surface 210 to achieve line contact sealing. Of course, this solution is not limited to this. In the sixth embodiment, both the edge 111 and the sealing surface 210 can be arc-shaped.

[0041] Optionally, in this embodiment, the elastic seal 300 is disposed on the sealing surface 210. It can be understood that since the sealing surface 210 is located on the outer wall of the valve core 200, disposing of the elastic seal 300 on the sealing surface 210 facilitates the installation and fixing of the elastic seal 300, reducing processing difficulty. Further, in this example, the sealing surface 210 is conical. Disposing of the elastic seal 300 on the sealing surface 210 increases the installation area of ​​the elastic seal 300 and the sealing surface 210, thereby increasing the connection stability between the elastic seal 300 and the sealing surface 210. Of course, this solution is not limited to this; in other embodiments, the elastic seal 300 can also be disposed on the edge 111.

[0042] Furthermore, in this embodiment, the electronic expansion valve 10 proposed in this solution is a dual-valve electronic expansion valve. The elastic sealing element 300 is disposed on the sealing surface 210 of the valve core 200, that is, the elastic sealing element 300 is disposed on the sealing surface 210 of the free end face of the large valve needle.

[0043] Optionally, the elastic seal 300 is snapped onto the sealing surface 210. It is understood that snap-fit ​​installation and disassembly are convenient, allowing for tool-free disassembly. No additional materials such as screws or fasteners are required during installation. Therefore, using a snap-fit ​​method to connect the elastic seal 300 and the sealing surface 210 is low-cost. Furthermore, the snap-fit ​​installation process is very simple, generally requiring only a pushing action to engage the snap-fit ​​structure. No rotational movement or pre-installation product positioning is needed, making it quick and easy. Therefore, using a snap-fit ​​method to connect the elastic seal 300 and the sealing surface 210 can improve the installation efficiency of the elastic seal 300. Of course, this solution is not limited to this; in other embodiments, the elastic seal 300 can also be bonded to the sealing surface 210.

[0044] The sealing surface 210 is provided with a groove, and the elastic sealing element 300 is provided with a corresponding protrusion for each groove. The shape of the protrusion and the groove are adapted to each other, and the protrusion is used to be engaged in the groove. Of course, this solution is not limited to this. In other embodiments, the sealing surface 210 may also be provided with a protrusion, the shape of the protrusion and the groove may be adapted to each groove, and the elastic sealing element 300 may be provided with a corresponding groove for each protrusion, and the protrusion is used to be engaged in the groove.

[0045] In this design, multiple slots can be spaced apart, and multiple protrusions corresponding to the slots are also provided, which increases the installation stability of the elastic seal 300. Of course, this solution is not limited to this. In other embodiments, the slots can be arranged in a ring shape, and the protrusions are arranged in a ring shape relative to a ring-shaped slot.

[0046] In this embodiment, the groove is located on the sealing surface 210. This avoids the situation where the groove is located on the elastic seal 300, which would reduce the local thickness of the elastic seal 300, resulting in lower local elasticity and poor sealing effect. Moreover, if the protrusion is located on the sealing surface 210, it is easy for the protrusion to collide with the edge 111 of the outlet 110, causing the protrusion to break. This solution avoids this situation by placing the protrusion on the elastic seal 300.

[0047] Furthermore, the card slot can be rectangular, spherical, T-shaped, or other structures; no specific structure of the card slot is limited here.

[0048] Furthermore, in this embodiment, the elastic seal 300 is bonded to the sealing surface 210, and the elastic seal 300 is snapped onto the sealing surface 210. This double fixation of the elastic seal 300 improves its installation stability and prevents it from detaching from the sealing surface 210. However, this solution is not limited to this; in other embodiments, the elastic seal 300 can be fixed solely by bonding or snapping.

[0049] Optionally, the wall thickness h of the elastic seal 300 ranges from 0.2 mm to 1 mm. If the wall thickness h of the elastic seal 300 is greater than 1 mm, the elastic seal 300 will be too thick. This requires a greater compression amount when the valve core 200 compresses the elastic seal 300 to achieve a seal. However, if the valve core 200 has a limited stroke, effective compression may not be achieved, resulting in insufficient contact between the sealing surface 210 and micro-leakage. If the wall thickness h of the elastic seal 300 is less than 0.2 mm, the elastic deformation capacity of the elastic seal 300 will be small. This will affect the sealing effect between the flange 111 and the free end of the valve core 200. Furthermore, this will result in a smaller compression amount of the elastic seal 300, which may lead to permanent deformation and loss of elasticity during compression, resulting in seal failure. This solution limits the wall thickness h of the elastic seal 300 to between 0.2 mm and 1 mm, i.e., 0.2 mm ≤ h ≤ 1 mm, thus improving the sealing effect between the flange 111 and the free end of the valve core 200.

[0050] It should be noted that the wall thickness of the elastic seal 300 can be understood as the distance from the side of the elastic seal 300 that contacts the edge 111 to the side of the elastic seal 300 that contacts the free end of the valve core 200 when the elastic seal 300 has not undergone elastic deformation.

[0051] Optionally, the valve seat 100 has a sealing end face 120 perpendicular to the moving direction of the valve core 200, and the flange 111 is formed between the sealing end face 120 and the inner peripheral wall 112 of the outlet 110. The sealing end face 120 and the inner peripheral wall 112 are tangentially transitioned to the flange 111. That is, the two sidewalls connected to the flange 111 of the outlet 110 are smoothly transitioned to the flange 111. It can be understood that this allows the connection between the sealing end face 120 and the flange 111 to be smooth. The connection between the sealing end face 120 and the inner circumferential surface and the edge 111 is smoother, avoiding sharp points at the connection between the sealing end face 120 and the edge 111, and the connection between the inner circumferential surface and the edge 111. This also avoids the formation of a "knife edge" at the edge of the edge 111, thus preventing the connection between the sealing end face 120 and the edge 111 and the connection between the inner circumferential surface and the edge 111 from scratching the elastic seal 300 when the valve core 200 blocks the outlet 110. This helps to extend the service life of the elastic seal 300. Of course, this solution is not limited to this. In other embodiments, the valve seat 100 has a sealing end face 120 that is perpendicular to the moving direction of the valve core 200. The edge 111 is formed between the sealing end face 120 and the inner peripheral wall 112 of the outlet 110. Chamfers can also be provided at the connection positions of the sealing end face 120 and the edge 111 and the connection positions of the inner peripheral surface and the edge 111, thereby reducing the sharpness of the connection positions of the sealing end face 120 and the edge 111 and the connection positions of the inner peripheral surface and the edge 111.

[0052] In one embodiment, the radius r of the flange 111 ranges from 0.2 mm to 1 mm; that is, 0.2 mm ≤ r ≤ 1 mm. It can be understood that if the radius r of the flange 111 is less than 0.2 mm, the flange 111 will be relatively sharp, forming a "knife edge," which may cause the flange 111 to scratch the elastic seal 300. If the radius r of the flange 111 is greater than 1 mm, the radius r is too large, which may prevent the gasket from being fully compressed, leading to seal failure. This solution limits the radius r of the flange 111 to between 0.2 mm and 1 mm. This avoids the flange 111 scratching the elastic seal 300 while increasing the sealing effect of the free section of the valve core 200 and the flange 111.

[0053] It should be noted that the radius r of the rim 111 refers to the radius of the arc surface between the sealing end face 120 and the inner circumferential surface.

[0054] Optionally, in one embodiment, the cone angle α of the sealing surface 210 is in the range of 60° to 90°, which can improve the contact effect between the sealing surface 210 and the edge 111, thereby improving the sealing performance between the free end of the valve core 200 and the edge 111.

[0055] In this embodiment, the cone angle α of the sealing surface 210 is 90°.

[0056] Optionally, the elastic seal 300 is made of rubber. This is because the high elasticity of rubber allows it to tightly conform to the contact surface under pressure, effectively filling tiny gaps and preventing liquid or gas leakage. Secondly, when the valve core 200 opens, the rubber elastic seal 300 quickly returns to its original shape, and it is not prone to permanent deformation with long-term use, maintaining long-term sealing reliability. Of course, this solution is not limited to this; in other embodiments, the elastic seal 300 can also be made of polyurethane, polytetrafluoroethylene, polyvinyl chloride, or silicone rubber.

[0057] Optionally, in this embodiment, the elastic seal 300 may also be made of glass fiber or carbon fiber. That is, in this embodiment, the elastic seal 300 may be made of rubber and glass fiber, or rubber and carbon fiber. This is because the addition of glass fiber or carbon fiber significantly improves the tensile strength and tear resistance of the rubber, preventing the gasket from breaking under high pressure or dynamic load. Moreover, under long-term pressure or high temperature, the deformation of fiber-reinforced rubber is small, maintaining the stability of the sealing structure. Secondly, the addition of glass fiber or carbon fiber can also significantly improve the temperature resistance of the elastic seal 300. Of course, this solution is not limited to this; in other embodiments, the elastic seal 300 may also be made of only rubber.

[0058] Furthermore, the proportion of glass fiber or carbon fiber in the overall material ranges from 10% to 30%; specifically, the mass proportion of glass fiber or carbon fiber in the overall material ranges from 10% to 30%, that is, 10% ≤ w ≤ 30%. If w is greater than 30%, the mass proportion of glass fiber or carbon fiber will be too high. The rigid skeleton of glass fiber or carbon fiber will limit the deformation ability of rubber, resulting in reduced flexibility of the sealing gasket and thus a decrease in sealing effect. Moreover, a high proportion of glass fiber or carbon fiber will weaken the ductility of rubber, making it prone to cracking and propagation under alternating stress, shortening the service life of the elastic seal 300. Secondly, an excessively high content of glass fiber or carbon fiber may lead to poor bonding between the rubber matrix and the fiber interface, resulting in fiber shedding or delamination after long-term use. If w is less than 10%, the content of glass fiber or carbon fiber is relatively small, and the reinforcing effect is not strong. This solution uses glass fiber or carbon fiber as the mass ratio of the overall material, ranging from 10% to 30%, which can further improve the sealing performance, temperature resistance, and service life of the elastic seal 300.

[0059] Optionally, in this embodiment, the outer peripheral surface of the free end of the valve core 200 is provided with a limiting protrusion ring, the valve seat 100 is provided with a moving channel communicating with the opening, the end face of the moving channel away from the opening is provided with a clearance opening, the valve core 200 is movably inserted through the clearance opening, the limiting protrusion ring is provided in the moving channel, and the limiting protrusion ring is used to abut against the end wall with the clearance opening for limiting.

[0060] Furthermore, in this embodiment, the electronic expansion valve 10 also includes a connecting seat, a moving channel with an opening, the connecting seat sealing the opening, the moving channel being formed between the connecting seat and the valve seat 100, and a clearance opening being formed on the connecting seat. The connecting seat has a limiting section extending toward the opening, the limiting section being used to abut against a limiting protrusion ring for limiting, which facilitates the installation of the valve core 200 while also limiting the displacement of the valve core 200. Of course, this solution is not limited to this. In other embodiments, the electronic expansion valve 10 may also include a cover plate, the moving channel having an opening, the cover plate being connected to the valve seat 100 to seal the opening, and a clearance opening being formed on the cover plate of the valve seat 100.

[0061] Furthermore, the sealing surface 210 is formed on the free end face of the valve core 200 and the limiting protrusion ring. This allows the width of the sealing surface 210 to be increased by utilizing the limiting protrusion ring, thereby reducing the radius of the valve core 200.

[0062] This utility model also proposes a refrigeration device, which includes an electronic expansion valve. The specific structure of the electronic expansion valve is as described in the above embodiments. Since this refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0063] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An electronic expansion valve, characterized in that, include: Valve seat, the valve seat having an outlet; A valve core, movably disposed within the valve seat, for blocking or opening the outlet, the valve core having a free end for abutting against the edge of the outlet; as well as An elastic seal is provided at the free end of the valve core or on the valve rim.

2. The electronic expansion valve as described in claim 1, characterized in that, The free end of the valve core has a sealing surface with a conical shape, which is used to abut against the edge of the outlet.

3. The electronic expansion valve as described in claim 2, characterized in that, The rim is curved.

4. The electronic expansion valve as described in claim 3, characterized in that, The elastic seal is disposed on the sealing surface.

5. The electronic expansion valve as described in claim 4, characterized in that, The elastic seal engages with the sealing surface.

6. The electronic expansion valve as described in claim 5, characterized in that, The elastic seal is bonded to the sealing surface.

7. The electronic expansion valve as described in claim 4, characterized in that, The wall thickness h of the elastic seal ranges from 0.2 mm to 1 mm.

8. The electronic expansion valve as described in claim 3, characterized in that, The valve seat has a sealing end face that is perpendicular to the moving direction of the valve core. The port edge is formed between the sealing end face and the inner peripheral wall of the outlet. The sealing end face and the inner peripheral wall are tangentially transitioned to the port edge.

9. The electronic expansion valve as described in claim 3, characterized in that, The radius r of the rim ranges from 0.2 mm to 1 mm.

10. The electronic expansion valve as described in claim 2, characterized in that, The cone angle α of the sealing surface ranges from 60° to 90°.

11. The electronic expansion valve according to any one of claims 1 to 10, characterized in that, The elastic seal is made of rubber.

12. The electronic expansion valve as described in claim 11, characterized in that, The elastic seal may also be made of glass fiber or carbon fiber.

13. A refrigeration device, characterized in that, Includes the electronic expansion valve as described in any one of claims 1 to 12.

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