JP7453416B2 - electronic expansion valve - Google Patents

Description

This application claims priority to a patent application filed with the National Intellectual Property Office of China on August 14, 2020, with application number 202010820482.0 and whose invention is titled "Electronic Expansion Valve." The company claims priority to a patent application filed with the National Intellectual Property Office of China on August 14, 2020, with application number 202021704259.1 and whose invention is titled "Electronic Expansion Valve." There is.

The present application relates to the technical field of electronic expansion valve devices, and specifically relates to electronic expansion valves.

With the development of science and technology, devices such as transformers and inductors are becoming more widely applied in modern society. Electronic expansion valves play an important role in devices such as transformers, inductors, etc. In order to facilitate the connection between the valve body and the coil, the housing of the coil is usually provided with a fixing plate that protrudes outward. The positioning piece is fixed to the coil housing by the fixing plate, and finally, the positioning piece realizes axial positioning and circumferential positioning of the valve body and the coil. The structure of connecting the valve body and coil using the above method is relatively complicated, and the fixing plate and positioning piece, and the positioning piece and the coil housing must be connected by caulking or welding, and the production Since the process is relatively complex, the production efficiency in the electronic expansion valve production process is low and the production cost is increased.

The main purpose of the present application is to provide an electronic expansion valve that solves the problems of high processing costs and low production efficiency caused by positioning and fixing using positioning pieces in the prior art.

In order to realize the above objective, the present application is provided with a connecting pipe at the bottom, the connecting pipe includes a horizontal pipe segment, the horizontal pipe segment protrudes from the side wall of the valve body, and the horizontal pipe segment extends in the extending direction. includes a valve body perpendicular to the axial direction of the valve body, a case, a cover, and a locking part located at the lower end of the case, the case having a mounting chamber therein, and the cover at the top of the mounting chamber. The valve body is installed in the mounting chamber, the top of the valve body abuts the inner wall of the cover, the locking part and the case are integrally molded, and the locking part locks the horizontal pipe segment. The company provides an electronic expansion valve including a protective case used for this purpose.

Furthermore, the locking part includes a locking block provided with a clamp cavity and a relief cavity therein, the horizontal tube segment is inserted into the clamp cavity, the relief cavity is located at one end of the clamp cavity close to the case, and Communicates with the clamp cavity.

Further, the clamp cavity has an opening formed in the end face of the locking block at one end remote from the case.

Furthermore, the side walls on both sides of the clamping cavity are provided with concave arcuate surfaces, which are adapted to the side walls of the connecting tube.

Further, a plurality of rib structures are provided on the concave arcuate surface, the rib structures are parallel to the connecting pipe, and the plurality of rib structures are provided spaced apart along the circumferential direction of the clamp cavity.

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, and the valve seat is provided with at least one annular groove in the circumferential direction, and the valve body is provided with an electronic expansion groove. The valve further includes at least one sealing ring that fits into the annular groove.

Furthermore, the valve body is welded to the valve seat to form a weld bead, and the sealing ring is located below the weld bead.

Furthermore, the opening gradually becomes smaller from the bottom to the top.

Furthermore, the cover is injection molded integrally with the case.

Furthermore, a plurality of cams are provided on the bottom side wall of the mounting chamber, the plurality of cams are spaced apart along the circumferential direction of the mounting chamber, and end surfaces of the plurality of cams at one end near the bottom of the case are positioned together. A receiving chamber is formed between the locating surface and the lower end of the mounting chamber, and the sealing ring is mounted within the accommodating chamber and abuts the locating surface.

When the technical aspects of the present application are applied, the electronic expansion valve of the present application can lock the bottom of the valve body with the locking part integrally formed in the case, and at the same time support the bottom of the cover with the top of the valve body. Therefore, the engagement between the valve body and the cover realizes the load capacity for the protective case and other devices such as the coil on the protective case, and there is no need for the locking part to support the load, and the axial direction between the valve body and the coil Integral injection molding of the case and the locking part can efficiently improve production efficiency and reduce production costs in order to realize positioning in the case and positioning in the circumferential direction.

The drawings in the specification forming part of the present application are for the purpose of providing a further understanding of the present application, and the schematic embodiments of the present application and their description are for the purpose of interpreting the present application. , which are not intended to unduly limit this application.

1 schematically shows a configuration diagram of an embodiment of an electronic expansion valve of the present application. 1 schematically shows a cross-sectional view of an embodiment of an electronic expansion valve of the present application. FIG. 4 schematically shows a configuration diagram from another angle of an embodiment of an electronic expansion valve of the present application. 1 schematically shows a configuration diagram of an embodiment of a valve body of the present application. 1 schematically shows a configuration diagram of an embodiment of a valve seat of the present application.

Here, the following symbols are included in the above drawings.
Reference Signs List 10 valve body, 111 valve body, 112 valve seat, 12 connecting pipe, 20 protective case, 21 case, 22 locking portion, 221 relief cavity, 222 clamp cavity, 223 concave arc surface, 23 cover, 30 annular groove, 40 Sealing ring, 50 cam.

It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other unless there is a contradiction. Hereinafter, the present application will be described in detail together with examples with reference to the drawings.

As described in the background art, with the development of science and technology, devices such as transformers and inductors are becoming more widely applied in modern society. Electronic expansion valves play an important role in devices such as transformers, inductors, etc. In order to facilitate the connection between the valve body and the coil, the housing of the coil is usually provided with a fixing plate that protrudes outward. The positioning piece is fixed to the coil housing by the fixing plate, and finally, the positioning piece realizes axial positioning and circumferential positioning of the valve body and the coil. The structure of connecting the valve body and coil using the above method is relatively complicated, and the fixing plate and positioning piece, and the positioning piece and the coil housing must be connected by caulking or welding, and the production Since the process is relatively complex, the production efficiency in the electronic expansion valve production process is low and the production cost is increased.

In order to solve the above problems, as shown in FIGS. 1 to 5, an embodiment of the present application is provided with a connecting pipe 12 at the bottom, the connecting pipe 12 includes a horizontal pipe segment, and the horizontal pipe segment has a valve. The extending direction of the horizontal pipe segment is perpendicular to the axial direction of the valve body 10, which protrudes from the side wall of the body 10, and the case 21, the cover 23, and the engaging member located at the lower end of the case 21. The case 21 has a mounting chamber therein, the cover 23 is provided over the top of the mounting chamber, the valve body 10 is mounted within the mounting chamber, and the top of the valve body 10 is mounted on the top of the cover 23. Abutting against the inner wall, the locking part 22 and the case 21 are integrally molded, and the locking part 22 provides an electronic expansion valve including a protective case 20 used for locking the horizontal pipe segment. Here, the protective case 20 wraps the coil of the electronic expansion valve, and the electronic expansion valve of the present application locks the connecting pipe 12 at the bottom of the valve body 10 with the locking part 22 integrally formed on the case 21, and at the same time, Since the bottom of the cover can be supported by the top of the valve body, the engagement between the valve body and the cover realizes load bearing capacity for the protective case and other devices such as coils on the protective case, and the locking part supports the load. The valve body 10 and the coil can be positioned in the axial direction and in the circumferential direction without the need for support, and the valve body 10 is fixedly connected to the protective case and the coil. Since the product is installed vertically during use, it is subject to the downward force of gravity, but the coil and protective case are supported by the valve body and will not fall off. Even when lifting the protective case and the coil, if it cannot be removed without overcoming the locking of the locking part 22 on the connecting pipe 12, the force of the locking does not need to be too large so that the protective case and the coil do not fall off. It is good if you can satisfy the following.

Specifically, the connecting pipe 12 further includes a vertical pipe segment, the vertical pipe segment is connected to the end of the horizontal pipe segment, and the axis of the vertical pipe segment is parallel to the axis of the valve body, and the case 21 of this embodiment and the locking portion 22 are integrally injection molded.

In order to realize the locking function of the locking part 22, the locking part 22 in this embodiment includes a locking block in which a clamp cavity 222 and a relief cavity 221 are provided, and the horizontal tube segment is connected to the clamp cavity 222. The relief cavity 221 is located at one end of the clamp cavity 222 close to the case 21 and communicates with the clamp cavity 222 . The locking block of this embodiment has a relief cavity 221 inside so that the clamp cavity 222 accommodates and clamps the horizontal pipe segment to realize fixation to the connecting pipe 12 and improve the elasticity of the locking block. Furthermore, by providing the relief cavity 221, the clamp portions on both sides of the clamp cavity 222 of the locking block have a larger deformation space, and have sufficient elasticity, high reliability, and a longer service life.

In order to easily lock the connecting pipe 12, the clamp cavity 222 in this embodiment has an opening formed in the end face of the locking block at one end remote from the case 21. By providing the opening, the elasticity of the clamp cavity 222 is reduced. By further increasing the deformation space, the connecting pipe 12 can be locked more easily.

Here, since the connecting pipe 12 is cylindrical, in order to prevent the connecting pipe 12 from slipping out of the clamp cavity 222, concave circular arc surfaces 223 are provided on both side walls of the clamp cavity 222 in this embodiment. The concave arc surfaces 223 are adapted to the side walls of the connecting pipe 12, and the axes of the two concave arc surfaces 223 are aligned so that the two concave arc surfaces 223 realize positioning and fixation with respect to the connecting tube 12. It overlaps with the axis of the connecting pipe 12.

To further prevent the connecting tube 12 from slipping out of the clamp cavity 222, the concave arc surface 223 in this embodiment is provided with a plurality of rib structures, the rib structure is parallel to the connecting tube 12, and the plurality of rib structures are provided spaced apart along the circumferential direction of the clamp cavity 222. By providing a plurality of cams 50 structures, the frictional force between the concave arcuate surface 223 and the outer wall of the connecting tube 12 is increased, and the connecting tube 12 is effectively prevented from slipping.

In order to prevent external impurities, water, etc. from entering the protective case 20 and corroding the valve body 10 and the coil, the valve body 10 in this embodiment has a valve body 111 and a bottom part of the valve body 111. The connecting tube 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, and the electronic expansion valve has at least one sealing ring 40 . Furthermore, the sealing ring 40 is fitted into the annular groove 30 .

Specifically, the valve body 111 in this embodiment is welded to the valve seat 112 to form a weld bead, and the sealing ring 40 is located below the weld bead. Impurities are prevented from entering the inside of the valve body 10 by welding with The body 111 and the valve seat 112, and the valve body 10 and the protective case 20 are efficiently sealed.

Positioning the top of the valve body 10 by the cover 23 instead of by the locking part 22 prevents the locking part 22 from being damaged, ensures support for the protective case, and makes installation by the operator easier. and to facilitate positioning, the cover 23 and the case 21 may be removably connected, and with a removable connection, it is necessary to add a sealing ring 40, and the cover 23 and the case 21 in this embodiment It is preferable to integrally injection mold with the material to ensure sealing performance.

In order to easily lock the connecting pipe, the opening in this embodiment gradually becomes smaller from the bottom to the top, and guide slopes are formed on both sides of the opening, so that when installing, the horizontal pipe segment will not move away from the opening. and is finally locked onto the concave arc surface.

A plurality of cams 50 are provided on the bottom side wall of the mounting chamber in this embodiment, and the plurality of cams 50 are spaced apart along the circumferential direction of the mounting chamber, and the plurality of cams 50 are close to the bottom of the case 21. The end surfaces of one end together form a positioning surface, a receiving chamber is formed between the positioning surface and the lower end of the mounting chamber, and the sealing ring 40 is installed in the receiving chamber and abuts against the positioning surface. By providing multiple cams 50, the O-ring can be positioned while also meeting the requirements of the injection process. In order to easily attach the valve body 10 and the sealing ring 40, a chamfer is preferably provided at the intersection of the attachment chamber and the bottom of the case 21.

The electronic expansion valve of the present application is convenient to assemble, and can effectively improve production efficiency and reduce production costs. By providing the protective case 20 on the coil housing, the original metal housing of the coil can be prevented from rusting or corroding, which can effectively extend the service life of the expansion valve, and at the same time Since the plastic case can also play a role in suppressing noise, it is possible to efficiently reduce noise when the electronic expansion valve operates.

From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects.

The electronic expansion valve of the present application can lock the bottom of the valve body with the locking part integrally formed in the case, and at the same time support the bottom of the cover with the top of the valve body, so that the valve body and the cover are not engaged. By connecting the valve body and other devices such as the coil on the protective case, it is possible to withstand the load, and there is no need for the locking part to support the load, and the valve body and coil can be positioned in the axial direction and in the circumferential direction. Therefore, integral injection molding of the case and the locking part can efficiently improve production efficiency and reduce production costs.

It should be pointed out that any of the above detailed descriptions are exemplary and are intended to provide further explanation for 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 applies.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates, the singular form is also intended to include the plural form, and further herein, the terms "comprising" and/or "comprising" are used herein. It should also be understood that when a feature, step, act, device, assembly and/or combination thereof is present.

It should be explained that the terms "first", "second", etc. in the specification, claims, and drawings of the present application are used to distinguish similar objects, and are used in the specification, claims, and drawings of the present application to distinguish between similar objects. They do not need to be used to describe sequential order. It is to be understood that the terms so used can be interchanged, as appropriate, so that the embodiments of the application described herein may be practiced, for example, in an order other than as illustrated or described herein. be.

Furthermore, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, e.g., processes, methods, systems comprising a series of steps or units; The product or device is not limited to those specifically enumerated steps or units, but also includes other steps or units not explicitly enumerated or specific to these processes, methods, products, or devices. be able to.

For convenience of explanation, spatially relative terms such as “on top of,” “above,” “on top of,” “above,” etc. are used herein to refer to a single device as shown in the drawings. or the spatial relationship of the feature to other devices or features. It is to be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation than those depicted in the drawings.

For example, when a device in a drawing is turned upside down, a device described as ``above another device or structure'' or ``on top of another device or structure'' is then described as ``below another device or structure.'' or "under other devices or structures." Thus, the exemplary term "above..." can include two orientations: "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations) and corresponding interpretations of the relative descriptions of space used here are made.

In the above detailed description, reference is made to the drawings which form a part of the text. In the drawings, like numbers typically identify similar parts, unless the context dictates otherwise. The illustrated embodiments described in the detailed specification, drawings, and claims are not meant 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. Aspects of the present disclosure, as generally described herein and as shown in the drawings, may be arranged, permuted, combined, divided, and designed in a wide variety of different configurations, all of which are described herein. It will be easily understood that this is explicitly considered.

The present disclosure is based on the specific embodiments described in this application, and is intended as illustrative of various aspects rather than limiting. Many modifications and changes are possible without departing from the spirit and scope of this disclosure, as will be apparent to those skilled in the art. Functionally equivalent methods and apparatus within the scope of this disclosure, in addition to those enumerated herein, will be apparent to those skilled in the art from the foregoing specification. Such modifications and changes are intended to be within the scope of the appended claims. The present disclosure is limited only by the terms of the appended claims and the full scope of equivalents to which such claims are entitled. It will be understood that this disclosure is not limited to particular methods, reagents, compounds, compositions, or biological systems, which can, of course, vary. It will also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

What has been described above are only preferred embodiments of the present application and are not intended to limit the present application, and the present application is capable of various modifications and variations to those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims (9)

An electronic expansion valve,
a connecting pipe (12) is provided at the bottom, said connecting pipe (12) being a valve body (10) comprising a horizontal pipe segment, said horizontal pipe segment protruding from a side wall of said valve body (10); a valve body (10) in which the extending direction of the horizontal pipe segment is perpendicular to the axial direction of the valve body (10);
The case (21) includes a case (21), a cover (23), and a locking part (22) located at the lower end of the case (21), the case (21) has an attachment chamber inside, and the cover (23) The valve body (10) is provided over the top of the attachment chamber, the valve body (10) is installed in the attachment chamber, the top of the valve body (10) abuts the inner wall of the cover (23), and the locking portion (22) and the case (21) are integrally molded, and the locking part (22) is a protective case (20) used for locking the horizontal pipe segment;
including;
The valve body (10) includes a valve body (111) and a valve seat (112) located at the bottom of the valve body (111), and the connecting pipe (12) is connected to the valve seat (112). , at least one annular groove (30) is provided in the circumferential direction of the valve seat,
The electronic expansion valve further includes at least one sealing ring (40);
The sealing ring (40) is fitted into the annular groove (30),
A plurality of cams (50) are provided on the bottom side wall of the attachment chamber, the plurality of cams (50) are spaced apart along the circumferential direction of the attachment chamber, and the plurality of cams (50) are arranged at intervals along the circumferential direction of the attachment chamber. The end surfaces of one end near the bottom of the case (21) together form a positioning surface, the lower end of the case (21) forms the lower end of the mounting chamber, and there is a gap between the positioning surface and the lower end of the mounting chamber. is an electronic expansion valve, wherein a storage chamber is formed, and the sealing ring (40) is installed in the storage chamber and abuts the positioning surface . The locking part (22) includes a locking block in which a clamp cavity (222) and a relief cavity (221) are provided, and the horizontal tube segment is inserted into the clamp cavity (222) and the relief cavity The electronic expansion valve according to claim 1, wherein (221) is located at one end of the clamp cavity (222) close to the case (21) and communicates with the clamp cavity (222). The electronic expansion valve according to claim 2, wherein the clamp cavity (222) has an opening formed in an end surface of one end of the locking block remote from the case (21). 3. The clamping cavity (222) is provided with concave arcuate surfaces (223) on both side walls, the concave arcuate surfaces (223) being adapted to the sidewalls of the connecting tube (12). Electronic expansion valve. A plurality of rib structures are provided on the concave arcuate surface (223), the rib structure is parallel to the connecting pipe (12), and the plurality of rib structures are arranged along the circumferential direction of the clamp cavity (222). The electronic expansion valve according to claim 4, wherein the electronic expansion valve is provided at a distance. An electronic expansion valve,
Including a valve body (10), a protective case (20) and a connecting pipe (12),
The protective case (20) includes a case (21), the case (21) having a mounting chamber therein;
The valve body (10) includes a valve body (111) and a valve seat (112) located at the bottom of the valve body (111), and the connecting pipe (12) is connected to the valve seat (112). , at least one annular groove (30) is provided in the circumferential direction of the valve seat ,
The electronic expansion valve further includes at least one sealing ring (40);
The sealing ring (40) is fitted into the annular groove (30) ,
A plurality of cams (50) are provided on the bottom side wall of the attachment chamber, the plurality of cams (50) are spaced apart along the circumferential direction of the attachment chamber, and the plurality of cams (50) are arranged at intervals along the circumferential direction of the attachment chamber. The end surfaces of one end near the bottom of the case (21) together form a positioning surface, the lower end of the case (21) forms the lower end of the mounting chamber, and there is a gap between the positioning surface and the lower end of the mounting chamber. is an electronic expansion valve, wherein a storage chamber is formed, and the sealing ring (40) is installed in the storage chamber and abuts against the positioning surface . Electronic according to claim 1 or 6, wherein the valve body (111) is welded to the valve seat to form a weld bead, and the sealing ring (40) is located below the weld bead. expansion valve. The electronic expansion valve according to claim 3, wherein the opening gradually becomes smaller from bottom to top. The electronic expansion valve according to claim 1, wherein the cover (23) is integrally injection molded with the case (21).

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