Electronic expansion valve

Abstract

The utility model relates to the technical field of expansion valves, in particular to an electronic expansion valve. The electronic expansion valve comprises a coil component and a valve body, the coil component is provided with a shell, an opening is formed in the bottom of the shell, one end of the valve body extends into the shell through the opening, a first connecting part is constructed at the bottom of the shell, a second connecting part is constructed outside the valve body, and at least part of the second connecting part is arranged on the outer wall of the valve body in a protruding mode in the radial direction. And the first connecting part and the second connecting part are clamped in a limiting manner. The valve has the advantages that the second connecting part is arranged on the peripheral side of the valve body, the first connecting part is arranged at the bottom of the shell, the first connecting part and the second connecting part can be directly connected in a limiting and clamping mode, a limiting structure does not need to be additionally arranged on the outer side of the shell or the outer side of the valve body to assist assembly, and limiting and clamping can be achieved through the structures of the shell and the valve body; the production efficiency is improved, the assembly process is simplified, and the manufacturing cost is reduced.

Description

Technical Field

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

[0002] An electronic expansion valve typically includes a coil assembly and a valve body, with the valve body and coil assembly being fixedly connected.

[0003] Existing electronic expansion valves typically have an additional limiting structure, such as a card or positioning plate, on the outer periphery of the coil component for mounting the valve body and coil component. The valve body and coil component need to be secured by the card, which leads to problems such as complex manufacturing process and low assembly efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an electronic expansion valve.

[0005] An electronic expansion valve includes: a coil component having a housing with an opening at the bottom; a valve body, wherein the coil component and the valve body are fixedly connected, and one end of the valve body extends into the housing through the opening; wherein the bottom of the housing has a first connecting portion, and the outside of the valve body has a second connecting portion, at least a portion of the second connecting portion protruding radially from the outer wall of the valve body, and the first connecting portion and the second connecting portion are engaged and locked.

[0006] In this configuration, the housing protects the coil installed within, while the valve body extends into the housing through the opening to abut and limit the coil, thus enhancing the stability of the structure. The outer periphery of the valve body has a second connecting portion, and the bottom of the housing has a first connecting portion. The first and second connecting portions can directly engage and limit the coil, eliminating the need for additional limiting structures on the outside of the housing or valve body to assist assembly. The inherent structure of the housing and valve body enables this locking and limiting engagement, improving production efficiency, simplifying the assembly process, and reducing manufacturing costs.

[0007] In one embodiment, at least a portion of the first connecting part protrudes from the bottom of the housing, the first connecting part is provided with a limiting groove, and the second connecting part is limited and engaged with the limiting groove;

[0008] The first connecting part is configured as a boss, and the inner side of the boss is provided with the limiting groove; the second connecting part is configured as a rib, and the rib and the limiting groove are mutually limiting and engaging.

[0009] In one embodiment, there are multiple bosses, which are spaced apart along the circumferential direction of the housing.

[0010] In one embodiment, the boss is provided in multiple ways, and a limiting protrusion is provided on the outer peripheral side of the valve body. The limiting protrusion protrudes outward along the radial direction of the valve body. The limiting protrusion is disposed between two adjacent bosses and is limited and engaged with the two adjacent bosses.

[0011] In one embodiment, the valve body is connected to a connector, at least a portion of which extends radially along the valve body and is located between two adjacent bosses.

[0012] In one embodiment, the second connecting portion is provided with a notch, and the width of the notch is greater than or equal to the width of the boss along the circumference of the valve body;

[0013] And / or, the outer peripheral side of the valve body is provided with an abutment plane, which extends along the axial direction of the valve body.

[0014] In one embodiment, the rib is separately disposed from the valve body, the valve body has a connecting hole, one end of the rib is bent inward along the radial direction of the valve body and connected to the connecting hole, and the other end of the rib is bent outward along the radial direction of the valve body and engaged with the boss for limiting.

[0015] In one embodiment, the valve body is provided with a connecting groove, the rib is engaged with the groove wall of the connecting groove, and the connecting hole is provided at the bottom of the connecting groove.

[0016] In one embodiment, the first connecting part is configured as a snap fastener, which extends along the axis of the housing and engages with the bottom of the housing to form a mating groove. The electronic expansion valve has a fixing frame, and the second connecting part is a plate-like structure that engages with the mating groove for limiting.

[0017] In one embodiment, the latch includes a connecting section and an extension section, the connecting section being connected to the housing, the extension section being connected to the end of the connecting section away from the housing and extending toward the axis of the housing, the extension section being spaced from the housing along the axial direction of the electronic expansion valve.

[0018] In one embodiment, the connecting segment extends along the axis of the housing, the mating groove extends through both sides of the buckle along the circumference of the housing, the fixing frame includes a limiting plate, and the second connecting part is the limiting plate, which is limited and engaged with the mating groove.

[0019] In one embodiment, one of the buckle and the limiting plate is provided with a protrusion, and the other is provided with a groove, and the protrusion and the groove are engaged accordingly.

[0020] In one embodiment, the protrusion is provided on the side wall of the mating groove opposite to the bottom of the housing, and the groove is provided on the side of the limiting plate facing the protrusion; or,

[0021] The bottom of the housing has a protrusion, which is located in the mating groove. The limiting plate has a groove on one side facing the housing.

[0022] In one embodiment, there are multiple limiting plates, which are spaced apart around the valve body.

[0023] In one embodiment, the first connecting portion and the second connecting portion are snapped together.

[0024] In one embodiment, the housing includes an upper waterproof shell, a lower waterproof shell, and an annular body, with the bottom of the housing located at the lower waterproof shell.

[0025] In one embodiment, the coil component has a stator assembly, an upper waterproof housing covering the upper part of the stator assembly, a lower waterproof housing covering the lower part of the stator assembly, and an annular gap formed between the upper and lower waterproof housings; the annular body is formed of material injected into the annular gap and into the assembly gap of the stator assembly.

[0026] In one embodiment, the coil component has a stator assembly, and the upper waterproof shell, the lower waterproof shell, and the annular body are integrally injection molded with the stator assembly as an insert.

[0027] Compared with the prior art, this utility model provides a first connecting part and a second connecting part on the housing and valve body of the coil component that can mutually limit and lock together. The assembly connection is achieved through the structure of the housing and valve body themselves. This ensures the overall structural stability of the coil component and eliminates the need to add additional limiting structures on the outside of the housing or valve body to assist assembly. The structure of the housing and valve body itself can achieve limiting and locking, which improves production efficiency, simplifies the assembly process, and reduces manufacturing costs. Attached Figure Description

[0028] Figure 1 A schematic diagram of the structure of an embodiment of the electronic expansion valve provided by this utility model;

[0029] Figure 2 A schematic diagram of the structure of the valve body provided in Embodiment 1 of this utility model;

[0030] Figure 3 A partial structural schematic diagram of the housing provided by this utility model in Embodiment 1;

[0031] Figure 4A partial structural schematic diagram of Embodiment 2 of the housing provided by this utility model;

[0032] Figure 5 A schematic diagram of the structure of Embodiment 2 of the electronic expansion valve provided by this utility model;

[0033] Figure 6 A schematic diagram of the structure of the valve body provided in Embodiment 2 of this utility model;

[0034] Figure 7 A schematic diagram of the structure of the valve body provided in Embodiment 3 of this utility model;

[0035] Figure 8 A schematic diagram of the structure of multiple limiting protrusions in Embodiment 3 of the valve body provided by this utility model;

[0036] Figure 9 A schematic diagram of the structure of the valve body provided in Embodiment 4 of this utility model;

[0037] Figure 10 A schematic diagram of the structure of Embodiment 4 of the electronic expansion valve provided by this utility model;

[0038] Figure 11 A schematic diagram of the structure of Embodiment 5 of the electronic expansion valve provided by this utility model;

[0039] Figure 12 A schematic diagram of the structure of Embodiment 5 of the retaining ring provided by this utility model;

[0040] Figure 13 A schematic diagram of the structure of the valve body provided in Embodiment 5 of this utility model;

[0041] Figure 14 A schematic diagram of the structure of Embodiment Six of the electronic expansion valve provided by this utility model;

[0042] Figure 15 A schematic diagram of the fixing frame provided in Embodiment Six of this utility model;

[0043] Figure 16 A partial structural schematic diagram of Embodiment Six of the housing provided by this utility model;

[0044] Figure 17 A schematic diagram of the fixing frame provided in Embodiment 7 of this utility model;

[0045] Figure 18 A cross-sectional view of one embodiment of the electronic expansion valve provided by this utility model.

[0046] The symbols in the diagram represent the following meanings:

[0047] 100. Electronic expansion valve; 10. Housing; 11. Opening; 12. Boss; 121. Limiting groove; 13. Annular body; 14. Lower waterproof housing; 15. Upper waterproof housing; 20. Valve body; 211. Rib; 213. Notch; 23. Connector; 24. Limiting protrusion; 25. Connecting hole; 26. Connecting groove; 30. Waterproof part; 40. Buckle; 41. Mating groove; 42. Connecting section; 43. Extension section; 44. Protrusion; 50. Fixing bracket; 51. Limiting plate; 52. Groove; 60. Stator assembly. Detailed Implementation

[0048] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0049] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected to" another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0053] Please see Figures 1-13 This utility model provides an electronic expansion valve 100, in which the valve body 20 and the housing 10 are connected by a first connecting part and a second connecting part mutually limiting and snapping together. The assembly between the two is simple and quick, and the connection is stable.

[0054] The electronic expansion valve 100 includes a coil component and a valve body 20. The coil component has a housing 10 with an opening 11 at the bottom. One end of the valve body 20 extends into the housing 10 through the opening 11. The bottom of the housing 10 has a first connecting portion, and the outside of the valve body 20 has a second connecting portion. At least a portion of the second connecting portion protrudes radially from the outer wall of the valve body 20, and the first connecting portion and the second connecting portion are mutually restrictive.

[0055] Thus, the housing 10 protects the coil installed therein, while the valve body 20 extends into the housing 10 through the opening 11 to abut against and limit the coil, making the various structures more stable. The outer periphery of the valve body 20 has a second connecting part, and the bottom of the housing 10 has a first connecting part. The first and second connecting parts can be directly locked and limited, eliminating the need for additional limiting structures on the outside of the housing 10 or the valve body 20 to assist assembly. The structures of the housing 10 and the valve body 20 themselves can achieve locking and limiting, improving production efficiency, simplifying the assembly process, and reducing manufacturing costs.

[0056] Preferably, in this embodiment, the first connecting part and the second connecting part are engaged by a snap-fit ​​mechanism. Specifically, at least a portion of the first connecting part protrudes from the bottom of the housing 10, the first connecting part has a limiting groove 121, and the second connecting part is engaged with the limiting groove 121. The first connecting part is configured as a boss 12, with the limiting groove 121 on its inner side, while the second connecting part is configured as a rib 211, which is engaged with the limiting groove 121. This snap-fit ​​structure between the rib 211 and the limiting groove 121 is simple and easy to assemble.

[0057] Understandably, in this embodiment, the rib 211 can be configured to be separate from the valve body 20 and fixedly connected to the valve body 20 by welding, snap-fitting, or other methods. In another embodiment, the rib 211 can also be integrally formed with the valve body 20, directly integrally formed during the processing of the valve body 20. Preferably, the extending plane formed by the limiting groove 121 on each boss 12 is perpendicular to the axis of the housing 10, and the extending plane of the second connecting part is perpendicular to the axis of the valve body 20. It should be explained that the extending plane formed by the limiting groove 121 on each boss 12 refers to a plane that can pass through the limiting groove 121 on each boss 12, and this plane is perpendicular to the axis of the housing 10. That is to say, all the limiting grooves 121 are opened on the same plane and are all perpendicular to the axis of the housing 10. If the axis of the housing 10 is defined as the vertical direction, then the extending direction of the limiting groove 121 is the horizontal direction. Similarly, the annular structure formed by the second connecting part also forms a plane perpendicular to the axis of the valve body 20. If the axis of the valve body 20 is defined as extending in the vertical direction, then the second connecting part can extend in the horizontal direction.

[0058] Of course, in other embodiments, the limiting grooves 121 do not necessarily have to be on the same horizontal line; they only need to be able to fit with the second connecting part. For example, the limiting groove 121 that is higher in the vertical direction corresponds to engaging with the adapted second connecting part, while the limiting groove 121 that is lower in the vertical direction corresponds to engaging with the adapted lower second connecting part. The above solution is only a preferred embodiment.

[0059] Along the circumference of the housing 10, the boss 12 is set in an arc shape, and the arc is adapted to the edge of the opening 11 to facilitate processing, improve the overall structure, and reduce interference between the boss 12 and other structures.

[0060] Please see Figure 18 The housing 10 includes an upper waterproof housing 15, a lower waterproof housing 14, and an annular body 13, with the bottom of the housing 10 located at the lower waterproof housing 14.

[0061] Furthermore, the upper waterproof shell 15 covers the upper part of the stator assembly 60, and the lower waterproof shell 14 covers the lower part of the stator assembly 60. An annular gap is formed between the upper waterproof shell 15 and the lower waterproof shell 14. The annular body 13 is formed by material injected into the annular gap and the assembly gap of the stator assembly 60. By using the upper waterproof shell 15, the lower waterproof shell 14 and the stator assembly 60 as inserts to injection mold the annular body, it is possible to facilitate the positioning of the stator assembly 60 in the mold during injection molding, while also relieving the injection pressure.

[0062] The upper waterproof shell 15, the lower waterproof shell 14, and the annular body 13 are integrally injection molded with the stator assembly 60 as an insert, which facilitates production.

[0063] In one embodiment of this application (not shown), the valve body 20 has a first valve seat, a second valve seat, and a sleeve that are separately disposed. The second valve seat is provided with a valve port. The valve port and the second valve seat can be separately disposed or integrally disposed. The first valve seat is disposed between the sleeve and the second valve seat, and one end of the first valve seat is fixedly connected to the second valve seat, and the other end is fixedly connected to the sleeve. A first connecting part is formed between the sleeve and the first valve seat. The first valve seat and the second valve seat can also be integrally disposed. There are various embodiments for the second connecting part and the corresponding boss 12, which are described in detail here:

[0064] Example 1

[0065] Please see Figures 1-3 In this embodiment, the second connecting part is provided as a rib 211, and the rib 211 is integrally formed with the valve body 20 to facilitate processing and improve the overall structure of the device.

[0066] Furthermore, the second connecting portion is provided with a notch 213, and the width of the notch 213 along the circumference of the valve body 20 is greater than or equal to the width of the boss 12. Therefore, the boss 12 can be engaged in the notch 213 and abut against the structure of the second connecting portion forming the notch 213, thereby forming a circumferential limiting abutment against the valve body 20 and reducing the rotation of the valve body 20 in the circumferential direction.

[0067] Furthermore, an abutment plane (not shown in the figure) is provided on the outer peripheral side of the valve body 20, and the abutment plane extends along the axial direction of the valve body 20. In this way, since the abutment plane is set as a plane, the abutment plane and the boss 12 are more stable compared with the outer peripheral side of the valve body 20 with a circular arc structure.

[0068] Example 2

[0069] Please see Figures 4-6 In this embodiment, multiple bosses 12 are provided, and the second connecting part is still a raised rib 211. A connector 23 is connected to the valve body 20. At least part of the connector 23 extends along the radial direction of the valve body 20 and is engaged between two adjacent bosses 12. In this way, the connector 23 plays the role of the notch 213 mentioned above. The connector 23 abuts against the boss to form a circumferential limit on the valve body 20 and prevent it from rotating.

[0070] Multiple bosses 12 are provided, and the multiple bosses 12 are arranged at intervals along the circumference of the housing 10. In this way, the bosses 12 arranged at intervals are easy to deform, and during the assembly process of the valve body 20 and the housing 10, the bosses 12 can avoid each other, making the assembly of the two more convenient.

[0071] Furthermore, to accommodate the configuration of the connector 23, the boss 12 in Embodiment 2 is adapted to extend along the axial direction of the housing 10 for easier contact with the connector 23. That is, the boss 12 in Embodiment 2 is longer than the boss 12 in Embodiment 1.

[0072] Example 3

[0073] Please see Figures 7-8 In this third embodiment, multiple bosses 12 are further provided, and a limiting protrusion 24 is provided on the outer peripheral side of the valve body 20. The limiting protrusion 24 protrudes outward along the radial direction of the valve body 20. The limiting protrusion 24 is disposed between two adjacent bosses 12 and engages with the two adjacent bosses 12 for limiting cooperation. In this way, the limiting protrusion 24 can extend into the interior of the boss 12, and the two sides of the limiting protrusion 24 respectively abut against the two adjacent bosses 12, thereby preventing the circumferential rotation of the valve body 20.

[0074] The limiting protrusion 24 can be optionally set as one or more. Preferably, in order to improve the limiting effect between the limiting protrusion 24 and the boss 12, four limiting protrusions 24 are added in this embodiment three. Each limiting protrusion 24 is engaged in the gap between two bosses 12, thereby forming a circumferential abutment.

[0075] Example 4

[0076] Please see Figures 9-10 In this embodiment, the rib 211 is separately set from the valve body 20. The rib 211 can be processed separately from the valve body 20 and then installed on the valve body 20, which reduces the difficulty of the processing technology and makes disassembly and maintenance more convenient.

[0077] Specifically, a notch 213 is also provided on the rib 211. The notch 213 enhances the elastic deformation of the rib 211, thus making it easier for the rib 211 to be flared before being assembled onto the valve body 20. After deformation is restored, it is firmly snapped onto the valve body 20.

[0078] Preferably, the valve body 20 has a connecting groove 26 along the circumferential direction, and the protruding rib 211 is embedded in the connecting groove 26 and engages with the groove wall of the connecting groove 26. The connecting groove 26 makes the connection strength between the protruding rib 211 and the valve body 20 higher.

[0079] In this fourth embodiment, the circumferential limiting of the valve body 20 is also achieved by means of the connector 23, and its setting method is the same as that in the second embodiment, so it will not be described again here.

[0080] Furthermore, the housing 10 is also provided with a waterproof section 30, which extends along the axis of the housing 10. One end of the waterproof section 30 is connected to the housing 10, and the other end is connected to a plurality of bosses 12. The waterproof section 30 can reduce the amount of water flowing into the gap between the valve body 20 and the housing 10 during rainy days, which can cause corrosion.

[0081] Preferably, the inner wall of the waterproof part 30 is fitted with the outer wall of the valve body 20 with a gap, so that the valve body 20 can be smoothly installed in place, and the gap can reduce the ingress of rainwater.

[0082] Example 5

[0083] Please see Figures 11-13 In this embodiment, the second connecting part is set as a rib 211, and the rib 211 is separately set from the valve body 20. The valve body 20 is provided with a connecting hole 25. One end of the rib 211 bends inward along the radial direction of the valve body 20 and connects with the connecting hole 25. The other end of the rib 211 bends outward along the radial direction of the valve body 20 and engages with the boss 12.

[0084] Thus, the connection between the connecting hole 25 and the rib 211 allows the rib 211 itself to be fixed in a preset position and prevents rotation. The other end of the rib 211 bends outward along the radial direction of the valve body 20 and engages with the boss 12. That is, the other end of the rib 211 acts as the connector 23 in embodiment four, preventing the valve body 20 from rotating circumferentially.

[0085] To facilitate the limiting contact between the end of the rib 211 furthest from the valve body 20 and the housing 10, a connecting groove 26 is provided on the boss 12, and a connecting hole 25 is formed on the bottom wall of the connecting groove 26. The rib 211 engages with the groove wall of the connecting groove 26. The end of the rib 211 that is bent radially inward extends into the connecting hole 25 on the bottom of the connecting groove 26. This prevents the rib 211 from detaching from the boss 12, thus preventing the limiting device from becoming unstable.

[0086] Example 6

[0087] Please see Figures 14-16 The bottom of the housing 10 is provided with at least one snap fastener 40, which extends along the axis of the housing 10 and mates with the bottom of the housing 10 to form a mating groove 41. The electronic expansion valve 100 has a fixing bracket 50, and the second connecting part is configured as a plate structure, with the fixing bracket 50 snapped into the mating groove 41. In this way, the housing 10 is used to protect the coil installed therein, while the valve body 20 extends into the housing 10 from the opening 11 to abut against and limit the coil, making the various structures more stable. The snap fastener 40 mates with the bottom of the housing 10 to form the mating groove 41, and the fixing bracket 50 snaps into the mating groove 41. The upper and lower sides of the fixing bracket 50 abut against the bottom of the housing 10 and the snap fastener 40, which improves the strength of the fixing bracket 50 in the axial direction, preventing the fixing bracket 50, i.e., the valve body 20, from moving or detaching in the axial direction. Moreover, the snap-fit ​​between the fixing bracket 50 and the mating groove 41 is simple and quick to assemble.

[0088] The latch 40 includes a connecting section 42 and an extension section 43. The connecting section 42 is connected to the housing 10, and the extension section 43 is connected to the end of the connecting section 42 away from the housing 10 and extends toward the axis of the housing 10. The extension section 43 and the housing 10 have a gap along the axial direction of the electronic expansion valve 100. Thus, the connecting section 42 is used for the connection between the latch 40 and the housing 10, and the gap between the extension section 43 and the housing 10 can form a mating groove 41. The fixing bracket 50 extends into the gap between the extension section 43 and the housing 10 and is limited on the upper and lower sides by the extension section 43 and the bottom of the housing 10, respectively, so that its axial limitation is more stable.

[0089] Preferably, the connecting section 42 extends along the axis of the housing 10, and the extension section 43 is perpendicular to the connecting section 42. Thus, the mating groove 41 formed by the connecting section 42 and the extension section 43 is more regular and has a more secure contact with the limiting bracket 50. The bottom wall of the mating groove 41 on the radially outer side is vertical, while the two side walls on the axial side of the housing 10 are parallel. Therefore, the lower surface of the fixing bracket 50 abuts against the parallel extending groove walls, resulting in greater stability, and the outermost periphery of the fixing bracket 50 extending into the mating groove 41 also fits more tightly against the bottom wall of the mating groove 41.

[0090] Adaptively, the outer peripheral wall of the fixing frame 50 is also set to be parallel to the axis of the housing 10, and the upper and lower sides of the fixing frame 50 also extend horizontally to better fit the mating groove 41.

[0091] Understandably, in other embodiments, the extension 43 may also be angled to the bottom of the housing 10 instead of being parallel as described above, thereby forming a mating groove 41 that gradually narrows along the depth direction. This allows the fixing bracket 50 to extend into the mating groove 41 and form an interference fit, which can also improve the connection strength.

[0092] Furthermore, the mating groove 41 extends along the circumference of the housing 10 through both sides of the snap fastener 40. Therefore, after the fixing bracket 50 is engaged with the mating groove 41, it can disengage from the mating groove 41 regardless of whether it is rotated clockwise or counterclockwise, thereby completing the disassembly of the valve body 20 from the housing 10. During the installation of the fixing bracket 50 and the snap fastener 40, the fixing bracket 50 can also rotate in any direction to enter the mating groove 41, making assembly more convenient.

[0093] The fixing frame 50 includes multiple limiting plates 51, and the second connecting part is a limiting plate 51. The limiting plates 51 are arranged at intervals around the valve body 20 and are engaged with the mating groove 41 for limiting engagement. In this way, as the fixing frame 50 rotates, the multiple limiting plates 51 can be engaged with the buckle 40 respectively, which facilitates assembly.

[0094] Furthermore, there are at least two latches 40, located at opposite ends of the bottom of the housing 10, and at least two limiting plates 51, which respectively engage with the mating grooves 41 formed by the two latches 40. Thus, the engagement of the two latches 40 with the two limiting plates 51 makes the connection between the fixing bracket 50 and the housing 10 more stable, thereby increasing the connection strength between the housing 10 and the valve body 20.

[0095] Understandably, in other embodiments, the latches 40 may be increased to three, four, five, or more to further improve the abutment stability of multiple limiting plates 51, and are not limited to the two latches 40 described above.

[0096] For example, four limiting plates 51 are provided and evenly spaced along the circumference of the valve body 20. As the valve body 20 rotates, each limiting plate 51 can engage with a latch 40. That is, the four limiting plates 51 are spaced 90° apart from each other, and correspondingly, four latches 40 are provided on the housing 10, with the included angle of the four latches 40 also set to 90°, so that the four abutment structures engage with the four latches 40. Of course, six or more latches 40 can also be added, and the extra latches 40 do not hinder the engagement between the fixing bracket 50 and multiple latches 40.

[0097] The engagement of the latch 40 and the limiting plate 51 on the fixing bracket 50 is for axial positioning of the valve body 20. Understandably, based on the above features, the valve body 20 achieves the assembly and contact between the fixing bracket 50 and the latch 40 by rotation. Therefore, it is also necessary to restrict the circumferential rotation of the valve body 20 to prevent the fixing bracket 50 from falling off the latch 40.

[0098] To address this, in this sixth embodiment, one of the latch 40 and the limiting plate 51 is provided with a protrusion 44, and the other is provided with a groove 52, to achieve connection. The protrusion 44 and the groove 52 engage accordingly. Thus, after the protrusion 44 and the groove 52 engage, an additional layer of limiting effect is formed between the latch 40 and the limiting plate 51 in addition to axial contact. The connection effect of the protrusion 44 and the groove 52 restricts the circumferential rotation of the valve body 20 and the fixing bracket 50 relative to the housing 10, thereby preventing them from rotating out of control and disengaging from the multiple latches 40 during operation.

[0099] In this embodiment, a protrusion 44 is provided on the side wall of the mating groove 41 away from the housing 10, and a groove 52 is provided on the side of the limiting plate 51 facing the protrusion 44. In this way, the limiting plate 51 is engaged with the buckle 40 through the engagement of the groove 52 and the mating groove 41.

[0100] Optionally, along the axial direction of the housing 10, the groove 52 extends through both sides of the limiting plate 51. Thus, when a protrusion 44 is provided at the bottom of the housing 10, and a protrusion 44 is also provided on the groove wall of the mating groove 41 on the side away from the housing 10, the groove openings on the upper and lower sides of the groove 52 can simultaneously limit the upper and lower protrusions 44, so as to further optimize the rotation restriction effect on the fixing bracket 50.

[0101] Please see Figure 17 In embodiment seven, the groove 52 is formed on the housing 10, and the protrusion 44 is provided on the limiting plate 51, so that the snap-fit ​​connection between the limiting plate 51 and the housing 10 can also be achieved.

[0102] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An electronic expansion valve, characterized in that, include: A coil component having a housing (10) with an opening (11) at the bottom of the housing (10); The valve body (20) is fixedly connected to the coil component, and one end of the valve body (20) extends into the housing (10) through the opening (11); The bottom of the housing (10) is provided with a first connecting part, and the outside of the valve body (20) is provided with a second connecting part. At least a portion of the second connecting part protrudes radially from the outer wall of the valve body (20), and the first connecting part and the second connecting part are mutually restrictive.

2. The electronic expansion valve according to claim 1, characterized in that, At least a portion of the first connecting part protrudes from the bottom of the housing (10), the first connecting part is provided with a limiting groove (121), and the second connecting part is limited and engaged with the limiting groove (121); The first connecting part is configured as a boss (12), and the inner side of the boss (12) is provided with the limiting groove (121); the second connecting part is configured as a rib (211), and the rib (211) and the limiting groove (121) are mutually limiting and cooperating.

3. The electronic expansion valve according to claim 2, characterized in that, There are multiple bosses (12), and the multiple bosses (12) are arranged at intervals along the circumferential direction of the housing (10).

4. The electronic expansion valve according to claim 3, characterized in that, The boss (12) is provided in multiple ways. A limiting protrusion (24) is provided on the outer peripheral side of the valve body (20). The limiting protrusion (24) protrudes outward along the radial direction of the valve body (20). The limiting protrusion (24) is provided between two adjacent bosses (12) and is limited and cooperates with the two adjacent bosses (12).

5. The electronic expansion valve according to claim 3, characterized in that, A connector (23) is connected to the valve body (20), at least a portion of which extends along the radial direction of the valve body (20) and is confined between two adjacent bosses (12).

6. The electronic expansion valve according to claim 2, characterized in that, The second connecting part is provided with a notch (213), and the width of the notch (213) along the circumference of the valve body (20) is greater than or equal to the width of the boss (12); And / or, the valve body (20) has an abutment plane on its outer peripheral side, the abutment plane extending along the axial direction of the valve body (20).

7. The electronic expansion valve according to claim 2, characterized in that, The rib (211) is separately disposed from the valve body (20). The valve body (20) has a connecting hole (25). One end of the rib (211) bends inward along the radial direction of the valve body (20) and connects to the connecting hole (25). The other end of the rib (211) bends outward along the radial direction of the valve body (20) and is limited and engaged with the boss (12).

8. The electronic expansion valve according to claim 7, characterized in that, The valve body (20) is provided with a connecting groove (26), the protruding rib (211) is engaged with the groove wall of the connecting groove (26), and the connecting hole (25) is provided at the bottom of the connecting groove (26).

9. The electronic expansion valve according to claim 1, characterized in that, The first connecting part is configured as a buckle (40), the buckle (40) extends along the axis of the housing (10) and cooperates with the bottom of the housing (10) to form a mating groove (41), the electronic expansion valve has a fixing frame (50), the second connecting part is a plate structure and is limited to the mating groove (41).

10. The electronic expansion valve according to claim 9, characterized in that, The buckle (40) includes a connecting section (42) and an extension section (43). The connecting section (42) is connected to the housing (10). The extension section (43) is connected to the end of the connecting section (42) away from the housing (10) and extends toward the axis of the housing (10). The extension section (43) and the housing (10) are spaced apart along the axis of the electronic expansion valve.

11. The electronic expansion valve according to claim 10, characterized in that, The connecting section (42) extends along the axis of the housing (10), the mating groove (41) passes through both sides of the buckle (40) along the circumference of the housing (10), the fixing frame (50) includes a limiting plate (51), the second connecting part is the limiting plate (51), and it is limited and mated with the mating groove (41).

12. The electronic expansion valve according to claim 11, characterized in that, One of the buckle (40) and the limiting plate (51) is provided with a protrusion (44), and the other is provided with a groove (52). The protrusion (44) and the groove (52) are engaged in a corresponding manner.

13. The electronic expansion valve according to claim 12, characterized in that, The protrusion (44) is provided on the side wall of the mating groove (41) opposite to the bottom of the housing (10), and the groove (52) is provided on the side of the limiting plate (51) facing the protrusion (44); or, The bottom of the housing (10) is provided with the protrusion (44), the protrusion (44) is located in the mating groove (41), and the limiting plate (51) is provided with the groove (52) on the side facing the housing (10).

14. The electronic expansion valve according to claim 11, characterized in that, There are multiple limiting plates (51), and the multiple limiting plates (51) are arranged at intervals around the valve body (20).

15. The electronic expansion valve according to claim 1, characterized in that, The first connecting part and the second connecting part are engaged.

16. The electronic expansion valve according to claim 1, characterized in that, The housing (10) includes an upper waterproof housing (15), a lower waterproof housing (14), and an annular body (13), with the bottom of the housing (10) located at the lower waterproof housing (14).

17. The electronic expansion valve according to claim 16, characterized in that, The coil component has a stator assembly (60), the upper waterproof shell (15) covers the upper part of the stator assembly (60), the lower waterproof shell (14) covers the lower part of the stator assembly (60), and an annular gap is formed between the upper waterproof shell (15) and the lower waterproof shell (14); the annular body (13) is formed of material injected into the annular gap and the assembly gap of the stator assembly (60).

18. The electronic expansion valve according to claim 16, characterized in that, The coil component has a stator assembly (60), and the upper waterproof shell (15), the lower waterproof shell (14), and the annular body (13) are integrally injection molded with the stator assembly (60) as an insert.

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