Electronic expansion valve and refrigeration equipment

Abstract

The invention discloses an electronic expansion valve and refrigeration equipment, the electronic expansion valve comprises a shell, a connecting seat and a nut, the connecting seat is connected to the shell, a mounting through hole and a riveting part are arranged on the connecting seat, and the nut is mounted in the mounting through hole and riveted to the connecting seat through the riveting part. According to the technical scheme, the problems of burning and melting of the welding heat conduction nut are solved, and the service life of the electronic expansion valve is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly relates to an electronic expansion valve and a refrigeration equipment. Background Art

[0002] Referring to Figures 1 to 3 , the existing nut assembly is integrally formed by injection molding of a nut 30 and a partition 31. After the nut 30 is press-fitted with the connecting seat 20, the partition 31 is then fixedly connected to the connecting seat 20 by laser welding. The original structures of the connecting seat 20 and the nut 30 are complex, and the production process is also complex. It is necessary to nest the partition 31 for injection molding together, and then fixedly connect the partition 31 and the connecting seat 20 by laser welding or argon arc welding to indirectly ensure the coaxiality between the nut 30 and the valve port. The coaxiality guarantee effect is poor. Moreover, during welding, the high temperature is easily conducted to the nut 30, causing the nut 30 to be burned, and even generating foreign matters formed by melting and then solidifying of the nut 30 material, which are brought into the system of the refrigeration equipment, resulting in system jamming defects, and further reducing the service life of the electronic expansion valve and the refrigeration equipment. Summary of the Invention

[0003] The main object of the present invention is to provide an electronic expansion valve, aiming to solve the problems of nut burning and melting caused by heat conduction during welding, and improve the service life of the electronic expansion valve.

[0004] To achieve the above object, the electronic expansion valve proposed by the present invention includes:

[0005] A housing;

[0006] A connecting seat, the connecting seat is connected to the housing, and the connecting seat is provided with an installation through hole and a riveting portion; and

[0007] A nut, the nut is installed in the installation through hole and is riveted to the connecting seat through the riveting portion.

[0008] Optionally, the riveting portion is a riveting plate, the riveting plate is arranged close to the installation through hole, the riveting plate has an initial state and a riveting state. In the initial state, the riveting plate extends axially towards the connecting seat; in the riveting state, the riveting plate is riveted to press the nut against the connecting seat.

[0009] Optionally, the connecting seat is provided with a riveting groove, and in the riveting state, the riveting plate is located in the riveting groove.

[0010] Optionally, a plurality of riveting plates are arranged at intervals, and the plurality of riveting plates are distributed along the circumferential direction of the connecting seat, and one riveting plate corresponds to one riveting groove.

[0011] Optionally, the riveting plate is arranged in a ring shape.

[0012] Optionally, a working chamber is formed by enclosing the housing and the connecting seat. The nut is provided with a vent hole. The working chamber is communicated with the outside through the vent hole. The riveting plate is arranged at an interval from the vent hole.

[0013] Optionally, the electronic expansion valve further includes a lead screw. The nut includes a fixed section and a threaded section connected to the fixed section. The lead screw is connected to the threaded section. The fixed section is in interference fit with the installation through hole.

[0014] Optionally, the installation through hole includes a guide hole and a positioning hole distributed along the axial direction of the nut. The part of the fixed section away from the threaded section is in interference fit with the positioning hole. The part of the fixed section close to the threaded section has a clearance fit with the guide hole.

[0015] Optionally, the radius of the guide hole is r1, and the maximum radius of the fixed section is r2, where 0.05 mm ≤ r1 - r2 ≤ 0.15 mm.

[0016] The present invention also provides a refrigeration device, including the electronic expansion valve as described above.

[0017] The electronic expansion valve in the technical solution of the present invention includes a housing, a connecting seat and a nut. The connecting seat is connected to the housing. The connecting seat is provided with an installation through hole and a riveting part. The nut is installed in the installation through hole and is riveted to the connecting seat through the riveting part. Compared with the prior art method of welding the partition plate to the connecting seat, the riveting in the technical solution of the present invention will not generate high temperature to burn the nut, and no foreign matters will be melted and re-solidified during the riveting process, so that the electronic expansion valve and the refrigeration device will not be stuck and damaged, thereby improving the service life of the electronic expansion valve and the refrigeration device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0019] Figure 1 is a cross-sectional view of an electronic expansion valve in the prior art;

[0020] Figure 2 is Figure 1 a cross-sectional view of the nut in

[0021] Figure 3 is Figure 1 a cross-sectional view of the connecting seat in

[0022] Figure 4 Cross-sectional view of the first embodiment of the electronic expansion valve of the present invention;

[0023] Figure 5 Cross-sectional view of the second embodiment of the electronic expansion valve of the present invention;

[0024] Figure 6 Cross-sectional view of the third embodiment of the electronic expansion valve of the present invention;

[0025] Figure 7 Cross-sectional view of the fourth embodiment of the electronic expansion valve of the present invention;

[0026] Figure 8 Schematic structural diagram of the nut in the first and third embodiments of the electronic expansion valve of the present invention;

[0027] Figure 9 is Figure 8 Cross-sectional view of one perspective;

[0028] Figure 10 is Figure 8 Cross-sectional view of another perspective;

[0029] Figure 11 Schematic structural diagram of the connecting seat in the first embodiment of the electronic expansion valve of the present invention;

[0030] Figure 12 is Figure 11 Cross-sectional view of one perspective;

[0031] Figure 13 Schematic structural diagram of the assembled connecting seat and nut in the second embodiment of the electronic expansion valve of the present invention;

[0032] Figure 14 Schematic structural diagram of the nut in the second and fourth embodiments of the electronic expansion valve of the present invention;

[0033] Figure 15 is Figure 14 Schematic structural diagram of another perspective;

[0034] Figure 16 Schematic structural diagram of the connecting seat in the second embodiment of the electronic expansion valve of the present invention;

[0035] Figure 17 is Figure 16 Cross-sectional view;

[0036] Figure 18 Schematic structural diagram of the connecting seat in the third embodiment of the electronic expansion valve of the present invention;

[0037] Figure 19 is Figure 18 Cross-sectional view of one perspective;

[0038] Figure 20Schematic diagram of the structure of the connecting seat in the fourth embodiment of the electronic expansion valve of the present invention;

[0039] Figure 21 is Figure 20 a cross-sectional view from a certain perspective in.

[0040] Explanation of the reference numerals in the drawings:

[0041]

[0042]

[0043] The realization of the object of the present invention, functional features and advantages will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0045] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0046] In the present invention, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0047] In addition, the descriptions involving "first", "second", etc. in the present invention are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, "and / or" throughout the text includes three scenarios. Taking A and / or B as an example, it includes the technical solution of A, the technical solution of B, and the technical solution where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] Referring to Figures 4 to 7 , the present invention provides an electronic expansion valve, comprising:

[0049] a housing 10;

[0050] a connecting seat 20, the connecting seat 20 being connected to the housing 10, and the connecting seat 20 being provided with a mounting through hole 22 and a riveting portion; and

[0051] a nut 30, the nut 30 being installed in the mounting through hole 22 and riveted to the connecting seat 20 through the riveting portion.

[0052] The electronic expansion valve in the technical solution of the present invention includes a housing 10, a connecting seat 20, and a nut 30. The connecting seat 20 is connected to the housing 10. The connecting seat 20 is provided with a mounting through hole 22 and a riveting portion. The nut 30 is installed in the mounting through hole 22 and is riveted to the connecting seat 20 through the riveting portion. Compared with the prior art method of welding a partition plate to the connecting seat 20, the riveting in the technical solution of the present invention will not generate high temperature to burn the nut 30, and no foreign matter will be melted and re-solidified during the riveting process, so that the electronic expansion valve and the refrigeration equipment will not be stuck and damaged, thereby improving the service life of the electronic expansion valve and the refrigeration equipment.

[0053] In this embodiment, the riveting part is a riveting plate 21, the riveting plate 21 is arranged close to the mounting through hole 22, and the riveting plate 21 has an initial state and a riveting state. In the initial state, the riveting plate 21 extends axially towards the connecting seat 20; in the riveting state, the riveting plate 21 is riveted so that the nut 30 is riveted to the connecting seat 20. When the nut 30 is not yet installed in the mounting through hole 22, the riveting plate 21 is in the initial state and extends axially along the connecting seat 20, so that the nut 30 can be smoothly inserted into the mounting through hole 22; after the nut 30 is installed in the mounting through hole 22, the riveting plate 21 is then riveted, so that the nut 30 is riveted to the connecting seat 20. During the entire installation process, no high temperature will be generated to burn the nut 30, and no foreign matter will melt and re-solidify during the riveting process, so that the electronic expansion valve and the internal part of the refrigeration equipment will not be stuck, etc., thereby improving the service life of the electronic expansion valve and the refrigeration equipment.

[0054] Furthermore, the riveting process of the riveting plate 21 is mature, the processing cost is low, and the riveting performance is stable and reliable. Furthermore, the connection strength and stability of the connection between the connecting seat 20 and the nut 30 are improved, and the processing costs of the connecting seat 20 and the nut 30 are reduced. The riveting plate 21 can be integrally formed with the connecting seat 20, or the riveting plate 21 can be welded and fixed to the connecting seat 20, or the riveting plate 21 can be bolted to the connecting seat 20; it can be understood that if the riveting plate 21 is welded to the connecting seat 20, the welding is carried out when the connecting seat 20 is processed, and the assembly of the nut 30 is carried out after the welding is completed, that is, the high temperature and re-solidified foreign matter generated during the welding of the connecting seat 20 and the riveting plate 21 will be cleaned before the assembly of the connecting seat 20 and the nut 30, so that the welding of the connecting seat 20 and the nut 30 will not affect the nut 30.

[0055] Of course, in other embodiments, riveting holes can also be provided on the connecting seat 20 and the nut 30, and the connecting seat 20 and the nut 30 are riveted and fixed through the cooperation of the rivets and the riveting holes.

[0056] Specifically, a riveting groove 331 is provided on the connecting seat 20. In the riveting state, the riveting plate 21 is located in the riveting groove 331. By adding the riveting groove 331 on the basis of riveting, the riveting plate 21 is further limited, preventing the riveting plate 21 from rotating in the circumferential direction of the nut 30 after riveting, thereby increasing the fixing effect of the riveting plate 21, further increasing the connection strength between the connecting seat 20 and the nut 30, and further improving the stability and service life of the electronic expansion valve.

[0057] Refer to Figure 4 、and Figures 8 to 12, in the first embodiment, the riveting plate 21 is arranged in a ring shape and is disposed around the edge of the mounting through hole 22. After the nut 30 is installed in the mounting through hole 22, the annular riveting plate 21 is riveted to the nut 30, thereby restricting the nut 30 in the circumferential and axial directions, further increasing the connection strength between the nut 30 and the connection seat 20, and further improving the stability of the electronic expansion valve.

[0058] Further, a working chamber is formed by enclosing the housing 10 and the connection seat 20. The nut 30 is provided with a vent hole 332, and the working chamber is communicated with the outside through the vent hole 332. The riveting plate 21 is spaced from the vent hole 332, so as to prevent the riveting plate 21 from blocking the vent hole 332, and further ensure the normal operation of the electronic expansion valve.

[0059] Specifically, the electronic expansion valve further includes a lead screw 41. The nut 30 includes a fixed section 33 and a threaded section 32 connected to the fixed section 33. The lead screw 41 is threadedly connected to the threaded section 32, and the fixed section 33 is in interference fit with the mounting through hole 22. The interference fit method is simple and reliable, with stable performance, mature technology and low cost.

[0060] In the prior art, a partition groove 23 is provided at the opening of the mounting through hole 22 of the connection seat 20. The partition is welded and fixed to the connection seat 20 and is limited and adapted in the partition groove 23, while the nut 30 has no fixed connection relationship with the mounting through hole 22; the nut 30 is used to connect the valve needle assembly and is disposed opposite to the valve port on the electronic expansion valve. The nut 30 drives the movement of the valve needle assembly to open or close the valve port on the electronic expansion valve. Therefore, the nut 30 and the valve port need to have a high coaxiality, so that when the valve port needs to be closed, the nut 30 can drive the valve needle assembly to accurately block the valve port. In the prior art, the nut 30 and the valve port are coaxially arranged by the mutual adaptation of the partition and the partition groove 23. However, there will be a certain error in the integral molding between the nut 30 and the partition, and there is also a certain manufacturing error in the partition groove 23 on the connection groove, resulting in a large error between the nut 30 and the valve port, and further reducing the coaxiality between the nut 30 and the valve port.

[0061] It can be understood that the mounting through hole 22 includes a guiding hole 221 and a positioning hole 222 distributed along the axial direction of the nut 30. The part of the fixed section 33 away from the threaded section 32 is in interference fit with the positioning hole 222, and the part of the fixed section 33 close to the threaded section 32 is in clearance fit with the guiding hole 221. The diameter of the guiding hole 221 is larger than the diameter of the nut 30, so that the nut 30 is convenient to be inserted into the mounting through hole 22, and further convenient for the interference fit of the nut 30 with the positioning hole 222.

[0062] Of course, it should be noted that the fixed section 33 and the installation through hole 22 are in interference fit as a whole, that is, the installation through hole 22 does not distinguish between the guiding hole 221 and the positioning hole 222, and it is also possible to achieve the interference fit through precision equipment.

[0063] Specifically, the radius of the guiding hole 221 is r1, and the maximum radius of the fixed section 33 is r2, where 0.05 mm ≤ r1 - r2 ≤ 0.15 mm. If r1 - r2 > 0.15 mm, although the nut 30 is easy to be placed into the installation through hole 22, the interference fit surface between the nut 30 and the positioning hole 222 is small, and the distance between the nut 30 and the guiding hole 221 is large, so that the nut 30 is likely to become loose, thereby reducing the connection strength of the nut 30. If r1 - r2 < 0.05 mm, it means that the diameter difference between the guiding hole 221 and the fixed section 33 of the nut 30 is too small, and thus it is not convenient for the fixed section 33 of the nut 30 to be inserted into the guiding hole 221 and the positioning hole 222. Setting 0.05 mm ≤ r1 - r2 ≤ 0.15 mm can not only facilitate the insertion of the fixed section 33, but also increase the stability of the nut 30.

[0064] Of course, in other embodiments, a guiding surface may also be provided at the corner of the lower end of the fixed section 33, so as to facilitate the insertion of the fixed section 33 of the nut 30 into the installation through hole 22 and achieve interference fit within the installation through hole 22. The guiding surface may be a flat surface, an arc surface, or a stepped surface, etc.

[0065] Refer to Figure 5 and Figures 13 to 17 In the second embodiment, a plurality of riveting plates 21 are provided at intervals, and the plurality of riveting plates 21 are distributed along the circumferential direction of the connecting seat 20, and one riveting plate 21 corresponds to one riveting groove 331. By providing a plurality of riveting plates 21, the nut 30 is riveted and fixed from multiple different directions and positions, thereby improving the stability of the nut 30.

[0066] Furthermore, a working cavity is formed by enclosing the housing 10 and the connecting seat 20. The nut 30 is provided with a vent hole 332, and the working cavity is communicated with the outside through the vent hole 332. The riveting plate 21 and the vent hole 332 are arranged at intervals, so as to prevent the riveting plate 21 from blocking the vent hole 332, thereby ensuring the normal operation of the electronic expansion valve.

[0067] Specifically, the electronic expansion valve further includes a lead screw 41. The nut 30 includes a fixed section 33 and a threaded section 32 connected to the fixed section 33. The lead screw 41 is threadedly connected to the threaded section 32, and the fixed section 33 is in interference fit within the installation through hole 22. The interference fit method is simple and reliable, with stable performance, mature technology and low cost.

[0068] In the prior art, a partition groove 23 is provided at the opening of the mounting through hole 22 of the connecting seat 20. The partition is welded and fixed to the connecting seat 20 and is limited and adapted in the partition groove 23, while the nut 30 has no fixed connection relationship with the mounting through hole 22; the nut 30 is used to connect the valve needle assembly and is disposed opposite to the valve port on the electronic expansion valve. The nut 30 drives the movement of the valve needle assembly to open or close the valve port on the electronic expansion valve. Therefore, it is necessary for the nut 30 and the valve port to have a high coaxiality, so that when the valve port needs to be closed, the nut 30 can drive the valve needle assembly to accurately block the valve port. In the prior art, the nut 30 and the valve port are coaxially arranged by the mutual adaptation of the partition and the partition groove 23. However, there are certain errors in the integral molding between the nut 30 and the partition, and there are also certain manufacturing errors in the partition groove 23 on the connecting groove, resulting in a large error between the nut 30 and the valve port, thereby reducing the coaxiality between the nut 30 and the valve port.

[0069] Understandably, the mounting through hole 22 includes a guiding hole 221 and a positioning hole 222 distributed along the axial direction of the nut 30. The part of the fixed section 33 away from the threaded section 32 is in interference fit with the positioning hole 222, and the part of the fixed section 33 close to the threaded section 32 is in clearance fit with the guiding hole 221. The diameter of the guiding hole 221 is larger than the diameter of the nut 30, so that the nut 30 is convenient to be inserted into the mounting through hole 22, and thus it is convenient for the nut 30 to be in interference fit with the positioning hole 222.

[0070] Of course, it should be noted that the fixed section 33 and the mounting through hole 22 are in overall interference fit, that is, the mounting through hole 22 does not distinguish between the guiding hole 221 and the positioning hole 222, and it is also possible to achieve interference fit only through precision equipment.

[0071] Specifically, the radius of the guiding hole 221 is r1, and the maximum radius of the fixed section 33 is r2, where 0.05mm ≤ r1 - r2 ≤ 0.15mm. If r1 - r2 > 0.15mm, although the nut 30 is convenient to be placed in the mounting through hole 22, the interference fit surface between the nut 30 and the positioning hole 222 is small, and the distance between the nut 30 and the guiding hole 221 is large, so that the nut 30 is easy to loosen, thereby reducing the connection strength of the nut 30; if r1 - r2 < 0.05mm, it means that the difference between the diameter of the guiding hole 221 and the diameter of the fixed section 33 of the nut 30 is too small, and thus it is not convenient for the fixed section 33 of the nut 30 to be inserted into the guiding hole 221 and the positioning hole 222. Setting 0.05mm ≤ r1 - r2 ≤ 0.15mm can not only facilitate the insertion of the fixed section 33, but also increase the stability of the nut 30.

[0072] Of course, in other embodiments, a guiding surface may also be provided at the corner of the lower end of the fixed section 33, so that the fixed section 33 of the nut 30 can be inserted into the installation through hole 22 more conveniently and is in interference fit with the installation through hole 22. The guiding surface may be a flat surface, an arc surface, a stepped surface, or the like.

[0073] Referring to Figure 6 , Figures 8 to 10 , and Figure 18 and Figure 19 , in the third embodiment, the riveting plate 21 is arranged in a ring shape and is disposed around the edge of the installation through hole 22. When the nut 30 is installed in the installation through hole 22, the annular riveting plate 21 is riveted to the nut 30, thereby limiting the nut 30 in the circumferential and axial directions, and further increasing the connection strength between the nut 30 and the connection seat 20, and further improving the stability of the electronic expansion valve.

[0074] Further, a working cavity is formed by enclosing the housing 10 and the connection seat 20. The nut 30 is provided with a vent hole 332, and the working cavity is communicated with the outside through the vent hole 332. The riveting plate 21 is arranged at an interval from the vent hole 332, so as to prevent the riveting plate 21 from blocking the vent hole 332, and further ensure the normal operation of the electronic expansion valve.

[0075] Specifically, the electronic expansion valve further includes a lead screw 41. The nut 30 includes a fixed section 33 and a threaded section 32 connected to the fixed section 33. The lead screw 41 is threadedly connected to the threaded section 32, and the fixed section 33 is in interference fit with the installation through hole 22. The interference fit method is simple and reliable, with stable performance, mature technology and low cost.

[0076] Further, the fixed section 33 is in interference fit with the installation through hole 22; of course, in the first and second embodiments, the installation through hole 22 may also be divided into a guiding hole 221 and a positioning hole 222, or a guiding surface may be provided at the corner of one end of the fixed section 33. For details, reference may be made to the descriptions in the first and second embodiments.

[0077] Referring to Figure 7 , Figure 14 , Figure 15 , Figure 20 and Figure 21 , in the fourth embodiment, a plurality of the riveting plates 21 are arranged at intervals, and the plurality of riveting plates 21 are distributed along the circumferential direction of the connection seat 20, and one riveting plate 21 corresponds to one riveting groove 331. By providing a plurality of riveting plates 21, the nut 30 is riveted and fixed from multiple different directions and positions, thereby improving the stability of the nut 30.

[0078] Further, a working chamber is formed by enclosing the housing 10 and the connecting seat 20. The nut 30 is provided with a vent hole 332. The working chamber is communicated with the outside through the vent hole 332. The riveting plate 21 is arranged at an interval from the vent hole 332, so as to prevent the riveting plate 21 from blocking the vent hole 332, thereby ensuring the normal operation of the electronic expansion valve.

[0079] Specifically, the electronic expansion valve further includes a lead screw 41. The nut 30 includes a fixed section 33 and a threaded section 32 connected to the fixed section 33. The lead screw 41 is threadedly connected to the threaded section 32. The fixed section 33 is in interference fit with the installation through hole 22. The interference fit method is simple and reliable, with stable performance, mature technology and low cost.

[0080] Further, the fixed section 33 is in interference fit with the installation through hole 22. Of course, it can also be that in the first embodiment and the second embodiment, the installation through hole 22 is divided into a guide hole 221 and a positioning hole 222, or a guide surface is provided at the corner of one end of the fixed section 33. Details can be referred to the descriptions in the first embodiment and the second embodiment.

[0081] The differences between the first and second embodiments and the third and fourth embodiments are that the electronic expansion valves in the first and second embodiments are mainly applied in the vehicle field, while the electronic expansion valves in the third and fourth embodiments are mainly applied in refrigeration equipment such as air conditioners and refrigerators. Among them, the valve ports in the first and second embodiments are directly connected to the refrigerant inlets and outlets in the vehicle, while the third and fourth embodiments are connected to the refrigerant inlets and outlets in the air conditioner or refrigeration equipment through the installation of pipe A and pipe B.

[0082] The present invention also provides a refrigeration device. The refrigeration device can be divided into compression refrigeration devices, absorption refrigeration devices, steam jet refrigeration devices, heat pump refrigeration devices, electrothermal refrigeration devices, etc. The refrigeration device mainly includes a motor, a compressor, an electronic expansion valve, an evaporator, a condenser and accessories, pipelines. Such as refrigerators, air conditioners, etc. The specific structure of the motor refers to the above embodiments. Since the refrigeration device in the present invention adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0083] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electronic expansion valve, characterized in that, Comprising: A housing; A connecting seat, the connecting seat being connected to the housing, the connecting seat being provided with a mounting through-hole and a riveting portion; and A nut, the nut being mounted in the mounting through-hole and being riveted to the connecting seat through the riveting portion.

2. The electronic expansion valve according to claim 1, characterized in that, The riveting portion is a riveting plate, the riveting plate being disposed adjacent to the mounting through-hole, the riveting plate having an initial state and a riveted state. In the initial state, the riveting plate extends axially towards the connecting seat; in the riveted state, the riveting plate is riveted to press the nut against the connecting seat.

3. The electronic expansion valve according to claim 2, characterized in that, The connecting seat is provided with a riveting groove, and in the riveted state, the riveting plate is located in the riveting groove.

4. The electronic expansion valve according to claim 3, characterized in that, A plurality of the riveting plates are provided at intervals, and the plurality of riveting plates are distributed along the circumferential direction of the connecting seat, and one riveting plate is provided corresponding to one riveting groove.

5. The electronic expansion valve according to claim 2, characterized in that, The riveting plate is arranged in a ring shape.

6. The electronic expansion valve according to claim 2, characterized in that, A working chamber is formed by enclosing the housing and the connecting seat. The nut is provided with a vent hole, and the working chamber is communicated with the outside through the vent hole, and the riveting plate is arranged at an interval from the vent hole.

7. The electronic expansion valve according to claim 1, characterized in that, The electronic expansion valve further includes a lead screw. The nut includes a fixed section and a threaded section connected to the fixed section. The lead screw is threadedly connected to the threaded section, and the fixed section is in interference fit in the mounting through-hole.

8. The electronic expansion valve according to claim 7, characterized in that, The mounting through-hole includes a guiding hole and a positioning hole distributed along the axial direction of the nut. The portion of the fixed section away from the threaded section is in interference fit in the positioning hole, and the portion of the fixed section close to the threaded section has a clearance fit with the guiding hole.

9. The electronic expansion valve according to claim 8, characterized in that, The radius of the guiding hole is r1, and the maximum radius of the fixed section is r2, and 0.05 mm ≤ r1 - r2 ≤ 0.15 mm.

10. A refrigeration device, characterized in that, Comprising the electronic expansion valve according to any one of claims 1 to 9.

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