Electronic expansion valve

Abstract

The present application provides an electronic expansion valve, comprising: a valve body, the bottom of the valve body is provided with a connecting pipe, the connecting pipe comprises a horizontal pipe section, the horizontal pipe section extends from the side wall of the valve body, and the extension direction of the horizontal pipe section is perpendicular to the axis direction of the valve body; a protective shell, the protective shell comprises a shell, a cover and a clamping part at the bottom end of the shell, the shell has an installation cavity inside, the cover is arranged on the top of the installation cavity, the valve body is installed in the installation cavity, the top of the valve body abuts against the inner wall of the cover, the clamping part is integrally formed with the shell, and the clamping part is used for clamping the horizontal pipe section. The electronic expansion valve of the present application clamps the bottom of the valve body through the clamping part integrally formed on the shell, meanwhile, the top of the valve body can abut against the bottom of the cover, so that the load bearing of the protective shell and other equipment on the protective shell, such as a coil, is realized through the cooperation of the valve body and the cover, the load bearing of the clamping part is not needed, the axial positioning and the circumferential positioning between the valve body and the coil are realized, the shell and the clamping part are integrally injection molded, the production efficiency can be effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of electronic expansion valve equipment technology, and more specifically, to an electronic expansion valve. Background Technology

[0002] With the development of technology, devices such as transformers and inductors have found wider applications in today's society. In these devices, electronic expansion valves play a crucial role. To facilitate the connection between the valve body and the coil, a protruding fixing plate is typically installed on the coil's outer shell. The fixing plate secures a positioning plate to the coil's outer shell, and the positioning plate then achieves axial and circumferential positioning of the valve body and coil. This method of connecting the valve body and coil is relatively complex. The fixing plate and positioning plate, as well as the positioning plate and the coil's outer shell, require riveting or welding, resulting in a complex manufacturing process. This leads to lower production efficiency and increased production costs for electronic expansion valves. Summary of the Invention

[0003] The main objective of this invention is to provide an electronic expansion valve to solve the problems of high processing costs and low production efficiency caused by the use of positioning plates for positioning and fixing in the prior art.

[0004] To achieve the above objectives, the present invention provides an electronic expansion valve, comprising: a valve body, wherein a connecting pipe is provided at the bottom of the valve body, the connecting pipe including a horizontal pipe section extending from the side wall of the valve body, the extension direction of the horizontal pipe section being perpendicular to the axial direction of the valve body; a protective shell, the protective shell including a housing, a cover and a snap-fit ​​portion located at the bottom end of the housing, the housing having an installation cavity inside, the cover covering the top of the installation cavity, the valve body being installed in the installation cavity, the top of the valve body abutting against the inner wall of the cover, the snap-fit ​​portion being integrally formed with the housing, and the snap-fit ​​portion being used to snap the horizontal pipe section.

[0005] Furthermore, the snap-fit ​​part includes a snap-fit ​​block, which has a clamping cavity and a relief cavity inside. The horizontal tube section passes through the clamping cavity, and the relief cavity is located at the end of the clamping cavity near the housing and communicates with the clamping cavity.

[0006] Furthermore, the clamping cavity forms an opening on the end face of the block at the end furthest from the housing.

[0007] Furthermore, the sidewalls on both sides of the clamping cavity are provided with concave arc surfaces, which are adapted to the sidewalls of the connecting pipe.

[0008] Furthermore, multiple raised strip structures are provided on the concave arc surface, the raised strip structures are parallel to the connecting pipe, and the multiple raised strip structures are spaced apart along the circumference of the clamping cavity.

[0009] Furthermore, the valve body includes a valve body and a valve seat located at the bottom of the valve body. The connecting pipe is connected to the valve seat. The valve seat is provided with at least one annular groove in its circumferential direction. The electronic expansion valve also includes at least one sealing ring, which is fitted in the annular groove.

[0010] Furthermore, the valve body and valve seat are welded together to form a weld, and the sealing ring is located below the weld.

[0011] Furthermore, the opening gradually decreases from bottom to top.

[0012] Furthermore, the cover and the shell are integrally injection molded.

[0013] Furthermore, the bottom sidewall of the mounting cavity is provided with multiple bosses, which are spaced apart circumferentially along the mounting cavity. The end faces of the multiple bosses near the bottom of the housing together form a positioning surface. A receiving cavity is formed between the positioning surface and the bottom of the mounting cavity. The sealing ring is installed in the receiving cavity and abuts against the positioning surface.

[0014] By applying the technical solution of this invention, the electronic expansion valve of this invention uses a snap-fit ​​part integrally formed on the housing to snap the bottom of the valve body, while the top of the valve body can rest against the bottom of the cover. Thus, the cooperation between the valve body and the cover enables the bearing of the protective housing and other equipment on the protective housing, such as coils, without the need for the snap-fit ​​part to bear the load. This achieves axial and circumferential positioning between the valve body and the coil. The integral injection molding of the housing and the snap-fit ​​part can effectively improve production efficiency and reduce production costs. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0016] Figure 1 A schematic diagram illustrating an embodiment of the electronic expansion valve of the present invention is shown.

[0017] Figure 2 A schematic cross-sectional view of an embodiment of the electronic expansion valve of the present invention is shown;

[0018] Figure 3 A schematic structural diagram of an embodiment of the electronic expansion valve of the present invention is shown from another angle;

[0019] Figure 4 A schematic diagram illustrating an embodiment of the valve body of the present invention is shown.

[0020] Figure 5 A schematic diagram illustrating an embodiment of the valve seat of the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 10. Valve body; 111. Valve body; 112. Valve seat; 12. Connecting pipe; 20. Protective shell; 21. Shell; 22. Snap-fit ​​part; 221. Relief cavity; 222. Clamping cavity; 223. Concave arc surface; 23. Cover body; 30. Annular groove; 40. Sealing ring; 50. Boss. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] As described in the background section, with the development of technology, devices such as transformers and inductors have found wider applications in modern society. In these devices, electronic expansion valves play a crucial role. To facilitate the connection between the valve body and the coil, a protruding fixing plate is typically installed on the coil's outer shell. The fixing plate secures a positioning plate to the coil's outer shell, and the positioning plate then achieves axial and circumferential positioning of the valve body and coil. This method of connecting the valve body and coil is relatively complex. The fixing plate and positioning plate, as well as the positioning plate and the coil's outer shell, require riveting or welding, resulting in a complex manufacturing process. This leads to lower production efficiency and increased production costs for electronic expansion valves.

[0025] To solve the above problem, see Figures 1 to 5As shown, an embodiment of the present invention provides an electronic expansion valve, including a valve body 10 and a protective shell 20. The valve body 10 has a connecting pipe 12 at its bottom, and the connecting pipe 12 includes a horizontal pipe section that extends from the side wall of the valve body 10. The extension direction of the horizontal pipe section is perpendicular to the axial direction of the valve body 10. The protective shell 20 includes a shell 21, a cover 23, and a snap-fit ​​part 22 located at the bottom of the shell 21. The shell 21 has an internal mounting cavity, and the cover 23 covers the top of the mounting cavity. The valve body 10 is installed in the mounting cavity, and the top of the valve body 10 abuts against the inner wall of the cover 23. The snap-fit ​​part 22 is integrally formed with the shell 21 and is used to snap the horizontal pipe section. The protective shell 20 encloses the coil of the electronic expansion valve. The electronic expansion valve of this invention uses a snap-fit ​​part 22 integrally formed on the shell 21 to snap onto the connecting pipe 12 at the bottom of the valve body 10. Simultaneously, the top of the valve body can rest against the bottom of the cover. Thus, the cooperation between the valve body and the cover enables the protection shell and other devices on the protective shell, such as the coil, to bear weight without requiring the snap-fit ​​part to bear weight. This achieves axial and circumferential positioning between the valve body 10 and the coil, fixing the valve body 10 to the protective shell and the coil. When the product is installed vertically, under the downward force of gravity, the coil and protective shell are held in place by the valve body and will not fall off. If the protective shell and coil are lifted upwards, they must overcome the snap-fit ​​part 22 on the connecting pipe 12 to be removed. The snap-fit ​​force does not need to be too large, just enough to prevent the protective shell and coil from falling off.

[0026] Specifically, the connector 12 also includes a vertical pipe section, which is connected to the end of the horizontal pipe section. The axis of the vertical pipe section is parallel to the axis of the valve body. In this embodiment, the housing 21 and the snap-fit ​​part 22 are integrally injection molded.

[0027] To achieve the snap-fit ​​function of the snap-fit ​​part 22, the snap-fit ​​part 22 in this embodiment includes a snap-fit ​​block. The snap-fit ​​block has a clamping cavity 222 and a relief cavity 221 inside. The horizontal tube section passes through the clamping cavity 222, and the relief cavity 221 is located at the end of the clamping cavity 222 near the housing 21 and communicates with the clamping cavity 222. The clamping cavity 222 accommodates and clamps the horizontal tube section, thereby fixing the connecting pipe 12. In order to improve the elasticity of the snap-fit ​​block, the snap-fit ​​block in this embodiment also has a relief cavity 221 inside. By setting the relief cavity 221, the clamping portions on both sides of the clamping cavity 222 of the snap-fit ​​block have a larger deformation space, resulting in sufficient elasticity, high reliability, and longer service life.

[0028] In order to facilitate the snap-fit ​​of the connector 12, the clamping cavity 222 in this embodiment has an opening on the end face of the block away from the housing 21. By setting the opening, the elastic deformation space of the clamping cavity 222 can be further increased, thereby facilitating the snap-fit ​​of the connector 12.

[0029] Since the connector 12 is cylindrical, in order to prevent the connector 12 from slipping out of the clamping cavity 222, the side walls on both sides of the clamping cavity 222 in this embodiment are provided with concave arc surfaces 223. The concave arc surfaces 223 are adapted to the side walls of the connector 12, and the axes of the two concave arc surfaces 223 coincide with the axis of the connector 12, so as to position and fix the connector 12 through the two concave arc surfaces 223.

[0030] To further prevent the connector 12 from slipping out of the clamping cavity 222, multiple raised strip structures are provided on the concave arc surface 223 in this embodiment. The raised strip structures are parallel to the connector 12 and are spaced apart circumferentially along the clamping cavity 222. By providing multiple boss structures 50, the friction between the concave arc surface 223 and the outer wall of the connector 12 is increased, thereby effectively preventing the connector 12 from slipping out.

[0031] To prevent external impurities, water, etc. from entering the protective shell 20 and corroding the valve body 10 and coil, the valve body 10 in this embodiment includes a valve body 111 and a valve seat 112 located at the bottom of the valve body 111. The connecting pipe 12 is connected to the valve seat 112. The valve seat 112 is provided with at least one annular groove 30 in the circumferential direction. The electronic expansion valve also includes at least one sealing ring 40, which is sleeved in the annular groove 30.

[0032] Specifically, in this embodiment, the valve body 111 and the valve seat 112 are welded together to form a weld. The sealing ring 40 is located below the weld. The welding of the valve body 111 and the valve seat 112 ensures that no impurities enter the valve body 10. At the same time, the sealing ring 40 is located below the weld, making full use of the sealing effect of the sealing ring 40 to effectively seal the valve body 111 and the valve seat 112, as well as the valve body 10 and the protective shell 20.

[0033] The top of the valve body 10 is positioned by the cover 23 instead of by the snap-fit ​​part 22, which prevents damage to the snap-fit ​​part 22, ensures support for the protective shell, and facilitates installation and positioning by the staff. The cover 23 and the shell 21 can be detachably connected. If a detachable connection is used, a sealing ring 40 needs to be added. Preferably, in this embodiment, the cover 23 and the shell 21 are integrally injection molded to ensure sealing performance.

[0034] To facilitate the snap-fit ​​of the connecting pipe, the opening in this embodiment gradually decreases from bottom to top, and guide slopes are formed on both sides of the opening. During installation, the horizontal pipe section enters through the opening and is finally snapped into the concave arc surface.

[0035] In this embodiment, the bottom sidewall of the mounting cavity is provided with multiple bosses 50. These bosses 50 are spaced apart circumferentially around the mounting cavity. The end faces of the bosses 50 near the bottom of the housing 21 together form a positioning surface. A receiving cavity is formed between the positioning surface and the bottom of the mounting cavity. The sealing ring 40 is installed in the receiving cavity and abuts against the positioning surface. By providing multiple bosses 50, the O-ring can be positioned, and the requirements of the injection molding process can be met. Preferably, a chamfer is provided at the junction of the mounting cavity and the bottom of the housing 21 to facilitate the installation of the valve body 10 and the sealing ring 40.

[0036] The electronic expansion valve of this invention is easy to assemble, effectively improving production efficiency and reducing production costs. The protective shell 20 on the coil housing prevents the original metal shell from rusting and corroding, effectively extending the service life of the expansion valve. Simultaneously, the plastic shell also helps suppress noise, effectively reducing the noise level during operation of the electronic expansion valve.

[0037] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0038] The electronic expansion valve of the present invention uses a snap-fit ​​part integrally formed on the housing to snap the bottom of the valve body, while the top of the valve body can rest against the bottom of the cover. Thus, the valve body and the cover cooperate to support the protective housing and other equipment on the protective housing, such as coils, without the snap-fit ​​part bearing the load. This achieves axial and circumferential positioning between the valve body and the coil. The integral injection molding of the housing and the snap-fit ​​part can effectively improve production efficiency and reduce production costs.

[0039] It should be noted that the above detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0040] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0041] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0042] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., may be used here to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figure. It should be understood that spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the figure.

[0044] For example, if a device in the accompanying drawings is inverted, a device described as "above" or "on top of" other devices or structures will subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0045] In the detailed description above, reference has been made to the accompanying drawings, which form part of this document. In the drawings, similar symbols typically identify similar parts unless the context otherwise indicates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not intended to be limiting. Other embodiments may be used and other changes may be made without departing from the spirit or scope of the subject matter presented herein. It will be readily understood that, as generally described herein and illustrated in the accompanying drawings, aspects of this disclosure can be arranged, substituted, combined, separated, and designed in a wide variety of different configurations, all of which are explicitly considered herein.

[0046] This disclosure, based on the specific embodiments described in this application, is not intended to be limiting and is intended as an illustration of various aspects. As will be apparent to those skilled in the art, many modifications and variations can be made without departing from the spirit and scope of this disclosure. Functionally equivalent methods and apparatuses, in addition to those listed herein, will be apparent to those skilled in the art from the foregoing description within the scope of this disclosure. Such modifications and variations are intended to fall within the scope of the appended claims. This disclosure will be limited only by the terms of the appended claims and the full scope of equivalents of such claims. It will be understood that this disclosure is not limited to specific methods, reagents, compounds, compositions, or biological systems, which are of course subject to variation. It will also be understood that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to be restrictive.

[0047] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An electronic expansion valve characterized by, The utility model provides a kind of electronic expansion valve, including: Valve body (10), the valve body (10) bottom is provided with connecting pipe (12), the connecting pipe (12) includes horizontal pipe section, the horizontal pipe section extends from the side wall of the valve body (10), the extension direction of the horizontal pipe section is perpendicular to the axis direction of the valve body (10); Protective shell (20), the protective shell (20) includes shell (21), cover (23) and the clamping portion (22) at the bottom of the shell (21), the shell (21) inside has installation cavity, the cover (23) is covered in the top of the installation cavity, the valve body (10) is installed in the installation cavity, the top of the valve body (10) is on the inner wall of the cover (23), the clamping portion (22) is integrally formed with the shell (21), and the clamping portion (22) is used for clamping the horizontal pipe section; The clamping portion (22) includes clamping block, the clamping block is provided with clamping cavity (222) and give place to cavity (221) inside, the horizontal pipe section is worn in the clamping cavity (222), and the give place to cavity (221) is located at one end of the clamping cavity (222) close to the shell (21) and is communicated with the clamping cavity (222); The valve body (10) includes valve body (111) and valve seat (112) at the bottom of the valve body (111), the connecting pipe (12) is connected with the valve seat (112), and the valve seat is provided with at least one annular groove (30) in the circumferential direction, and the electronic expansion valve further comprises at least one sealing ring (40), and the sealing ring (40) is sleeved in the annular groove (30); The bottom side wall of the installation cavity is provided with a plurality of bosses (50), and the plurality of bosses (50) are arranged at intervals in the circumferential direction of the installation cavity; the end faces of the plurality of bosses (50) close to the bottom of the shell (21) form a positioning surface together; a containing cavity is formed between the positioning surface and the bottom end of the installation cavity; the sealing ring (40) is installed in the containing cavity and abuts against the positioning surface.

2. The electronic expansion valve according to claim 1, characterized in that The clamping cavity (222) forms an opening on the end face of the clamping block away from the shell (21).

3. The electronic expansion valve according to claim 1, wherein The side walls on both sides of the clamping cavity (222) are provided with concave arc surfaces (223) matched with the side walls of the connecting pipe (12).

4. The electronic expansion valve according to claim 3, characterized in that A plurality of convex strip structures are arranged on the concave arc surfaces (223), the convex strip structures are parallel to the connecting pipe (12), and the plurality of convex strip structures are arranged at intervals in the circumferential direction of the clamping cavity (222).

5. The electronic expansion valve according to claim 1, wherein The valve body (111) is welded to the valve seat, and a weld is formed; the sealing ring (40) is located below the weld.

6. The electronic expansion valve according to claim 2, wherein The opening gradually decreases from bottom to top.

7. The electronic expansion valve according to claim 1, wherein The cover (23) and the shell (21) are integrally injection molded.

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