CN222378524U

CN222378524U - Electronic expansion valve

Info

Publication number: CN222378524U
Application number: CN202421205344.1U
Authority: CN
Inventors: 王绍飞; 王傅钢; 金钜
Original assignee: Dunan Automotive Thermal Management Technology Co Ltd
Current assignee: Dunan Automotive Thermal Management Technology Co Ltd
Priority date: 2024-05-29
Filing date: 2024-05-29
Publication date: 2025-01-21
Anticipated expiration: 2034-05-29

Abstract

The present application discloses an electronic expansion valve, comprising a valve component and a coil component. The valve component comprises a valve body and a sleeve, wherein the valve body and the sleeve are connected; the valve body has an annular portion, wherein the annular portion is sleeved on the outer periphery of the sleeve; the coil component comprises a coil assembly and a sealing ring, wherein at least a portion of the coil assembly is sleeved on the outer periphery of the sleeve, and the sealing ring is fixedly arranged on the coil assembly, sleeved on the outer periphery of the annular portion, and sealed between the annular portion and the coil assembly.

Description

Electronic expansion valve

Technical Field

The application relates to the technical field of refrigeration control, in particular to an electronic expansion valve.

Background

The electronic expansion valve in the related art comprises a valve component and a coil component, and when the electronic expansion valve works, a pulse signal is applied to the coil component to drive a valve core component of the valve component to move, so that the opening degree of a valve port is regulated, and the control of the fluid flow is realized.

In order to prevent moisture or other impurities in the external environment from entering the coil component from an assembly gap between the valve component and the coil component, and causing corrosion or failure of the coil component, a sealing ring is generally arranged between a sleeve of the valve component and the coil component in the related art, and the sealing ring is in interference fit with the sleeve. However, in the process of sleeving the coil component on the outer circumference of the sleeve, the sealing ring is continuously pressed by the sleeve and the coil component, and air in a cavity between the coil component and the sleeve cannot be discharged, so that the assembly efficiency is affected due to inconvenient installation.

Disclosure of utility model

The embodiment of the application provides an electronic expansion valve, which aims to solve the problem of inconvenient installation of a coil component and a sleeve in the related art.

The electronic expansion valve of the embodiment of the application comprises:

A valve member including a valve body and a sleeve connected to each other, the valve body having an annular portion fitted around the sleeve, and

The coil component comprises a coil assembly and a sealing ring, wherein at least part of the coil assembly is sleeved on the periphery of the sleeve, and the sealing ring is fixedly arranged on the coil assembly, sleeved on the periphery of the annular part and sealed between the annular part and the coil assembly.

According to some embodiments of the application, the coil part further comprises:

The limiting piece is fixedly arranged on the coil assembly, and the sealing ring is limited between the limiting piece and the coil assembly.

According to some embodiments of the application, the coil assembly is provided with a bottom surface, the limiting piece is fixedly connected with the bottom surface, and the coil assembly is also provided with a sinking groove which is recessed from the bottom surface towards the top of the coil assembly along the axial direction of the electronic expansion valve;

the sealing ring and the part of the annular part surrounded by the sealing ring are both positioned in the sinking groove, and the sealing ring is abutted between the bottom surface of the sinking groove and the limiting piece.

According to some embodiments of the application, a side surface of the sealing ring facing the limiting piece is provided with a first annular convex rib, the first annular convex rib is abutted with the limiting piece, and/or,

The sealing ring faces to one side surface of the coil assembly, and is provided with a second annular convex rib which is abutted with the coil assembly.

According to some embodiments of the application, the inner circumferential surface of the seal ring is interference fit with the outer circumferential surface of the annular portion.

According to some embodiments of the application, the valve body comprises:

a connecting sleeve connected with the sleeve, and

The connecting ring is fixedly sleeved on the periphery of the connecting sleeve and is provided with the annular part.

According to some embodiments of the application, the connecting sleeve is connected with the sleeve through a welding part, and the connecting ring is coated on the welding part.

According to some embodiments of the application, the connecting ring is interference fit with the connecting sleeve.

According to some embodiments of the application, the valve member further comprises a valve seat having a mounting cavity, at least a portion of the connection sleeve and at least a portion of the connection ring are both located within the mounting cavity, and the connection ring is threadably connected to the valve seat.

According to some embodiments of the application, the cavity wall of the mounting cavity has a second stop;

The periphery of the connecting sleeve is provided with a stop part which is abutted with the second limiting part, and the connecting ring is abutted against the stop part and is provided with a gap with the second limiting part.

According to some embodiments of the application, the connecting ring further comprises a ring body located in the mounting cavity, the ring body is fixedly sleeved on the outer peripheral surface of the connecting sleeve and is in threaded connection with the valve seat;

the annular part is convexly arranged on one side surface of the annular body, which faces the coil assembly, and a gap is formed between the inner peripheral surface of the annular part and the outer peripheral surface of the sleeve.

According to some embodiments of the application, the side of the ring facing away from the sleeve further has an annular groove, in which at least part of the sealing ring is located.

One embodiment of the above application has at least the following advantages or benefits:

According to the electronic expansion valve, on one hand, the sealing ring is arranged between the annular part and the coil component, so that the tightness between the valve component and the coil component is improved, external water vapor or impurities are prevented from entering the coil component, the risk of corrosion of the coil component is further reduced, and therefore the working performance and the service life of the coil component are improved.

Drawings

Fig. 1 is a schematic perspective view of an electronic expansion valve according to an embodiment of the present application.

Fig. 2 shows a cross-sectional view of an electronic expansion valve according to an embodiment of the present application.

Fig. 3 shows a partial enlarged view at X1 in fig. 2.

Fig. 4 shows an exploded view of the coil assembly.

Fig. 5 shows a partial cross-sectional view of the seal ring.

Fig. 6 shows a partial enlarged view at X2 in fig. 2.

Wherein reference numerals are as follows:

100. Valve component

110. Valve body

111. Annular part

111A, annular groove

112. Connecting sleeve

112A, a first limit part

112B, stop portion

113. Connecting ring

113A, ring body

113B, gap

114. Welded part

120. Casing pipe

130. Valve core assembly

140. Chamber chamber

150. Valve seat

151. Mounting cavity

152. Second limit part

153. Inlet port

154. An outlet

200. Coil component

210. Coil assembly

211. Bottom surface

212. Sink groove

220. Sealing ring

221. First annular convex rib

222. Second annular convex rib

230. Limiting piece

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

It will be understood that the terms "comprising," "including," and "having," and any variations thereof, are intended to cover non-exclusive inclusions in the embodiments of the application. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or apparatus.

As shown in fig. 1 to 3, the electronic expansion valve of the embodiment of the present application includes a valve member 100 and a coil member 200, the valve member 100 including a valve body 110, a sleeve 120, and a valve body assembly 130, the valve body 110 and the sleeve 120 being connected to form a chamber 140 accommodating the valve body assembly 130. The valve body 110 has an annular portion 111, and the annular portion 111 is fitted around the outer periphery of the sleeve 120. The coil component 200 includes a coil assembly 210 and a sealing ring 220, at least a portion of the coil assembly 210 is sleeved on the outer periphery of the sleeve 120, the coil assembly 210 is coupled with the valve core assembly 130, and the sealing ring 220 is fixedly connected to the coil assembly 210, sleeved on the outer periphery of the annular portion 111, and sealed between the annular portion 111 and the coil assembly 210.

The electronic expansion valve according to the embodiment of the application, on one hand, can improve the tightness between the valve component 100 and the coil component 200 by arranging the sealing ring 220 between the annular part 111 and the coil component 210, thereby avoiding the entry of external moisture or impurities into the coil component 210, and further reducing the risk of corrosion of the coil component 210, and further improving the working performance and service life of the coil component 210, and on the other hand, the sealing ring 220 is sleeved on the periphery of the annular part 111 and is not in direct contact with the sleeve 120, so that the sealing ring 220 does not generate contact friction with the sleeve 120 in the process of sleeving the coil component 200 on the periphery of the sleeve 120, and air between the coil component 200 and the sleeve 120 can be discharged with a gap, thereby improving the installation efficiency of the electronic expansion valve.

The coil assembly 210 is coupled to the valve core assembly 130, so that when the electronic expansion valve works, the valve core assembly 130 can be driven to move by applying a pulse signal to the coil assembly 210, and then the opening of the valve port is adjusted, so that the control of the fluid flow is realized.

As shown in fig. 1 and 2, the valve member 100 further includes a valve seat 150, and the valve body 110 is mounted to the valve seat 150. The valve seat 150 has a mounting cavity 151 and at least a portion of the valve body 110 is located within the mounting cavity 151. The outer surface of the valve seat 150 has an inlet 153 and an outlet 154, the inlet 153 and the outlet 154 being in communication with the mounting cavity 151.

Of course, in other embodiments, the electronic expansion valve may not include the valve seat 150, and the valve body 110 may be directly installed in the refrigeration system.

As shown in fig. 2, the valve body 110 includes a connection sleeve 112 and a connection ring 113. The connecting sleeve 112 is welded with the sleeve 120 in a sealing manner to form a chamber 140, the connecting ring 113 is fixedly sleeved on the periphery of the connecting sleeve 112, and the connecting ring 113 is provided with an annular part 111. At least part of the connection sleeve 112, at least part of the connection ring 113 is located in the mounting cavity 151, and the connection ring 113 is threadedly connected with the valve seat 150.

It will be appreciated that the connecting ring 113 is threadedly coupled to the valve seat 150 to form a seal at the junction of the connecting ring 113 and the valve seat 150, thus preventing external moisture from entering the gap between the connecting ring 113 and the connecting sleeve 112 from the gap between the connecting ring 113 and the valve seat 150 and flowing into the coil assembly 210.

The connecting sleeve 112 and the connecting ring 113 may be an integral structure or a split structure. When the connecting sleeve 112 and the connecting ring 113 are in a split structure, the connecting ring 113 and the connecting sleeve 112 can be fixedly connected by interference fit, screw connection, welding, etc.

As shown in fig. 2 and 3, the connecting sleeve 112 and the sleeve 120 are connected by a welded portion 114, and the connecting ring 113 is coated on the welded portion 114. In the embodiment of the application, the connecting ring 113 is coated on the welding portion 114, that is, the welding portion 114 is located at the inner side of the connecting ring 113, the sealing ring 220, the connecting ring 113 and the valve seat 150 protect the welding portion 114, and further prevent the welding portion 114 from being corroded due to the external water flowing to the welding portion 114.

The outer periphery of the connecting sleeve 112 is provided with a first limiting part 112a, and the sleeve 120 is abutted against the first limiting part 112 a.

In an embodiment, the first limiting portion 112a is a step structure, and the sleeve 120 abuts against a step surface of the step structure.

As shown in fig. 3, the connecting ring 113 further includes a ring body 113a located in the mounting cavity 151, and the ring body 113a is fixedly sleeved on the outer peripheral surface of the connecting sleeve 112 and is in threaded connection with the valve seat 150. The ring body 113a may be connected to the connection sleeve 112 by interference fit, screw connection, welding, etc.

The annular portion 111 is provided protruding from a side surface of the ring body 113a facing the coil block 210, and a gap is provided between an inner peripheral surface of the annular portion 111 and an outer peripheral surface of the sleeve 120. When the connecting sleeve 112 and the connecting ring 113 are in a split structure, the ring body 113a can be fixedly connected with the connecting sleeve 112 through interference fit, and the inner circumferential surface of the annular portion 111 is in clearance fit with the outer circumferential surface of the sleeve 120, so that the clearance can reduce the assembly difficulty between the connecting sleeve 112 and the connecting ring 113.

As an example, a side surface of the ring body 113a facing the coil assembly 210 is flush with an outer surface of the valve seat 150. In other words, the ring body 113a is neither above the outer surface of the valve seat 150 nor below the outer surface of the valve seat 150. On the one hand, uniformity of the outer appearance of the valve seat 150 and the ring body 113a is improved, and on the other hand, formation of a space for storing impurities on the top surface of the ring body 113a due to the fact that the ring body 113a is lower than the outer surface of the valve seat 150 is avoided.

As shown in fig. 3 and 4, the coil assembly 200 further includes a stopper 230, the stopper 230 is fixedly connected to the coil assembly 210, and the sealing ring 220 is limited between the stopper 230 and the coil assembly 210.

In one embodiment, the coil assembly 210 has a bottom surface 211 facing the valve seat 150, the stopper 230 is fixedly connected to the bottom surface 211, the coil assembly 210 further has a sinking groove 212, the sinking groove 212 is recessed from the bottom surface 211 toward the top of the coil assembly 210 along the axial direction of the valve core assembly 130, the sealing ring 220 and the part of the annular portion 111 surrounded by the sealing ring 220 are both positioned in the sinking groove 212, and the sealing ring 220 is abutted between the bottom surface of the sinking groove 212 and the stopper 230.

In the embodiment of the present application, the limiting member 230 limits the sealing ring 220 in the sinking groove 212 of the coil assembly 210, so as to reduce the volume of the electronic expansion valve along the axial direction of the valve core assembly 130.

In one embodiment, the inner peripheral surface of the seal ring 220 is interference fit with the outer peripheral surface of the annular portion 111. The seal ring 220 and the annular portion 111 are in interference fit, so that the connection firmness of the seal ring 220 can be ensured, and the sealing performance of the seal ring 220 is further ensured.

As shown in fig. 3, the side of the annular portion 111 facing away from the sleeve 120 further has an annular groove 111a, and at least part of the seal ring 220 is located in the annular groove 111 a. In the embodiment of the present application, the inner circumferential surface of the seal ring 220 is in interference fit with the groove bottom surface of the annular groove 111 a.

As shown in fig. 5, a first annular rib 221 is disposed on a side surface of the seal ring 220 facing the limiting member 230, the first annular rib 221 surrounds the outer periphery of the sleeve 120 and is in abutment with the limiting member 230, and/or a second annular rib 222 is disposed on a side surface of the seal ring 220 facing the bottom surface of the sinking groove 212 of the coil assembly 210, and the second annular rib 222 surrounds the outer periphery of the sleeve 120 and is in abutment with the bottom surface of the sinking groove 212 of the coil assembly 210.

In the embodiment of the present application, the sealing ring 220 is provided with the first annular rib 221 and/or the second annular rib 222, the sealing ring 220 can generate larger deformation after the annular rib is pressed, the deformation force drives the inner circumferential surface of the sealing ring 220 to become circular arc, and the circular arc sealing ring 220 is in sealing fit with the annular portion 111, so that the sealing performance of the sealing ring 220 is improved.

As shown in fig. 6, the wall of the mounting cavity 151 has a second limiting portion 152, and the outer periphery of the connecting sleeve 112 is provided with a stopper portion 112b abutting against the second limiting portion 152. The ring body 113a of the connecting ring 113 abuts against the stop portion 112b, and a gap is formed between the ring body and the second limiting portion 152.

It should be noted that, when the electronic expansion valve is installed, the sleeve 120 may be connected to the connecting sleeve 112, for example, by welding, then the connecting ring 113 and the connecting sleeve 112 are connected as a whole, for example, by interference fit, and then the valve body 110 is installed into the installation cavity 151 of the valve seat 150. Thereafter, the coil assembly 210 may be installed, and during installation of the coil assembly 210, the coil assembly 210 and the sleeve 120 are in a non-sealed state, and air in the cavity between the coil assembly 210 and the sleeve 120 may be exhausted. Finally, a packing 220 is mounted to the outer circumference of the ring portion 111, and a space between the coil block 210 and the sleeve 120 is closed.

In the embodiment of the application, the connecting ring 113 is not in direct contact with the second limiting part 152, and the stop part 112b of the connecting sleeve 112 is abutted with the second limiting part 152, so that the design has the advantages that when the valve body 110 is installed in the installation cavity 151 of the valve seat 150, after the stop part 112b of the connecting sleeve 112 is abutted with the second limiting part 152, the torque of the threaded structure of the connecting ring 113 and the valve seat 150 can reach the target value, the connecting sleeve 112 is ensured to be completely compressed by the connecting ring 113, the connection stability of the connecting sleeve 112, the connecting ring 113 and the valve seat 150 is further ensured, and the looseness of the connecting sleeve 112 caused by the looseness of the threaded structure between the connecting ring 113 and the valve seat 150 is avoided. The surface of the connecting ring 113 facing the second limiting portion 152 is provided with a notch 113b, and at least part of the stopping portion 112b is located in the notch 113 b. If the connecting ring 113 is in direct contact with the second limiting portion 152, the stop portion 112b located in the notch 113b is easily loose and firm, or is deformed by extrusion.

In an embodiment, the second limiting portion 152 is a step structure, and the stop portion 112b abuts against a step surface of the step structure.

In summary, the electronic expansion valve according to the embodiment of the application has at least the following advantages and beneficial effects:

It will be appreciated that the various embodiments/implementations provided by the application may be combined with one another without conflict and are not illustrated here.

In the examples of the application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and the term "plurality" is intended to refer to two or more unless otherwise expressly defined. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the terms in the examples of application will be understood by those of ordinary skill in the art as the case may be.

In the description of the application embodiments, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the application embodiments and simplifying the description, and do not indicate or imply that the devices or units to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the application embodiments.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an application embodiment. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the application embodiment, and is not intended to limit the application embodiment, and various modifications and changes may be made to the application embodiment by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the application should be included in the protection scope of the embodiments of the application.

Claims

1. An electronic expansion valve, comprising:

The valve component (100) comprises a valve body (110) and a sleeve (120), wherein the valve body (110) is connected with the sleeve (120), the valve body (110) is provided with an annular part (111), the annular part (111) is sleeved on the periphery of the sleeve (120), and

The coil component (200) comprises a coil assembly (210) and a sealing ring (220), wherein at least part of the coil assembly (210) is sleeved on the periphery of the sleeve (120), and the sealing ring (220) is fixedly arranged on the coil assembly (210), sleeved on the periphery of the annular part (111) and sealed between the annular part (111) and the coil assembly (210).

2. The electronic expansion valve according to claim 1, wherein the coil part (200) further comprises:

And the limiting piece (230) is fixedly arranged on the coil assembly (210), and the sealing ring (220) is limited between the limiting piece (230) and the coil assembly (210).

3. The electronic expansion valve according to claim 2, wherein the coil block (210) has a bottom surface (211), the stopper (230) is fixedly connected to the bottom surface (211), the coil block (210) further has a sinking groove (212), and the sinking groove (212) is recessed from the bottom surface (211) toward a top of the coil block (210) along an axial direction of the electronic expansion valve;

The sealing ring (220) and the part, surrounded by the sealing ring (220), of the annular part (111) are located in the sinking groove (212), and the sealing ring (220) is abutted between the bottom surface of the sinking groove (212) and the limiting piece (230).

4. The electronic expansion valve according to claim 2, wherein a side surface of the seal ring (220) facing the stopper (230) is provided with a first annular bead (221), the first annular bead (221) being abutted against the stopper (230), and/or,

And a second annular convex rib (222) is arranged on one side surface of the sealing ring (220) facing the coil assembly (210), and the second annular convex rib (222) is abutted with the coil assembly (210).

5. The electronic expansion valve according to claim 1, wherein an inner peripheral surface of the seal ring (220) is interference-fitted with an outer peripheral surface of the annular portion (111).

6. The electronic expansion valve according to any one of claims 1 to 5, wherein the valve body (110) comprises:

a connecting sleeve (112) connected to the sleeve (120), and

And a connecting ring (113) fixedly sleeved on the periphery of the connecting sleeve (112), wherein the connecting ring (113) is provided with the annular part (111).

7. The electronic expansion valve according to claim 6, wherein the connecting sleeve (112) and the sleeve (120) are connected by a welded portion (114), and the connecting ring (113) is coated on the welded portion (114).

8. The electronic expansion valve according to claim 6, characterized in that the connection ring (113) is in an interference fit with the connection sleeve (112).

9. The electronic expansion valve of claim 6, wherein the valve member (100) further comprises a valve seat (150), the valve seat (150) having a mounting cavity (151), at least a portion of the connection sleeve (112), at least a portion of the connection ring (113) are located within the mounting cavity (151), and the connection ring (113) is threadably coupled to the valve seat (150).

10. The electronic expansion valve according to claim 9, characterized in that the chamber wall of the mounting chamber (151) has a second limit portion (152);

The periphery of the connecting sleeve (112) is provided with a stop part (112 b) which is in contact with the second limiting part (152), and the connecting ring (113) is in contact with the stop part (112 b) and has a gap with the second limiting part (152).

11. The electronic expansion valve according to claim 9, wherein the connecting ring (113) further comprises a ring body (113 a) located in the installation cavity (151), and the ring body (113 a) is fixedly sleeved on the outer peripheral surface of the connecting sleeve (112) and is in threaded connection with the valve seat (150);

The annular portion (111) is provided so as to protrude from a surface of the ring body (113 a) facing the coil block (210), and a gap is provided between an inner peripheral surface of the annular portion (111) and an outer peripheral surface of the sleeve (120).

12. The electronic expansion valve according to any of claims 1 to 5, wherein the side of the annular portion (111) facing away from the sleeve (120) further has an annular groove (111 a), at least part of the sealing ring (220) being located in the annular groove (111 a).