CN116951154A

CN116951154A - Electronic expansion valve and refrigeration equipment

Info

Publication number: CN116951154A
Application number: CN202210392679.8A
Authority: CN
Inventors: 唐文博; 黄龙华; 陈超; 曾庆军
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2023-10-27

Abstract

The invention discloses an electronic expansion valve and refrigeration equipment, and relates to the field of valves, wherein the electronic expansion valve comprises a valve body assembly, a coil and an assembly part, the coil comprises a stator assembly and the assembly part, and the stator assembly is sleeved on the periphery of the valve body assembly; the assembly part comprises an annular body, a plurality of matching parts and connecting arms for connecting the annular body with each matching part, wherein the annular body is annularly arranged on the periphery of the valve body assembly and fixedly connected with the stator assembly, and the matching parts are clamped and connected with the valve body assembly. The electronic expansion valve provided by the invention can realize the arbitrary angle installation of the coil and the valve body assembly, has low assembly cost, and is easier to complete the assembly of the coil and the valve body assembly.

Description

Electronic expansion valve and refrigeration equipment

Technical Field

The invention relates to the field of valves, in particular to an electronic expansion valve and refrigeration equipment.

Background

In the related art, the coil and the valve body of the electronic expansion valve are basically fixed in a welding mode, so that the electronic expansion valve is high in fixing cost, high in assembly difficulty, inconvenient to mount and dismount and incapable of realizing multi-angle mounting of the coil and the valve body assembly.

Disclosure of Invention

The invention mainly aims to provide an electronic expansion valve, which aims to solve the problems that the fixed connection mode between a coil and a valve body of the electronic expansion valve in the prior art is high in cost, complex in assembly and inconvenient to install and detach.

In order to achieve the above object, an electronic expansion valve according to the present invention includes:

a valve body assembly;

the coil comprises a stator assembly, and the stator assembly is sleeved on the periphery of the valve body assembly;

the assembly part comprises an annular body, a plurality of matching parts and connecting arms for connecting the annular body and each matching part, wherein the annular body is arranged on the periphery of the valve body assembly in a surrounding mode and fixedly connected with the stator assembly, and the matching parts are clamped and connected with the valve body assembly.

Optionally, the connecting arm and the annular body form an included angle.

Optionally, the cross section of the connecting arm along the axial direction of the annular body is in a flat plate shape or an arc shape or a folded line shape or a corrugated shape or a multi-section folded shape.

Optionally, a plurality of connecting parts are convexly arranged on the inner edge of the annular body towards the circle center direction, and each connecting part is correspondingly connected with each connecting arm.

Optionally, the circumferential width of the connecting arm is less than or equal to the circumferential width of the connecting portion;

the circumferential width of the connecting arm is smaller than or equal to the width of the matching part.

Optionally, one of the peripheral walls of the fitting part and the valve body assembly is provided with a first protrusion, and the other is provided with a first positioning groove for inserting and positioning the first protrusion;

or, at least one of the matching parts is provided with a first bulge, and at least one of the matching parts is provided with a first positioning groove;

the outer peripheral wall of the valve body assembly is provided with a first positioning groove corresponding to the first protrusion, and the outer peripheral wall of the valve body assembly is provided with a first protrusion corresponding to the first positioning groove.

Optionally, the outer surface of the first protrusion is arc-shaped.

Optionally, the mating portion is plate-shaped or spherical or hemispherical.

Optionally, the mating portion has a first end and a second end disposed along an axial direction of the fitting, and the connecting arm is connected to the first end or the connecting arm is connected to the second end; or the connecting arm is connected between the first end and the second end.

Optionally, the inner edge between two adjacent connecting parts of the annular body is convexly provided with a reinforcing part towards the center direction, and the reinforcing part and the connecting part are arranged at intervals.

Optionally, a first positioning part is arranged on one side of the annular body facing the stator assembly, and a second positioning part matched with the first positioning part in a positioning way is correspondingly arranged on one side of the stator assembly facing the annular body;

the first positioning part is a bulge, and the second positioning part is a groove; or,

the first positioning part is a groove, and the second positioning part is a protrusion.

Optionally, the annular body is provided with a plurality of second grooves or through holes arranged at intervals along the axial direction, the annular body and the stator assembly are formed into a plastic body which wraps the stator assembly and the annular body through injection molding, and the second grooves or the through holes are filled with the plastic body.

Optionally, the fitting is a metal piece.

Optionally, the annular body is an annular plate; or (b)

The ring body is formed into a ring shape by a plurality of circular arcs.

Optionally, the coil further includes a cap body, the cap body covers and locates the stator module deviates from the one end of assembly part, the cap body with the coil encloses and closes and form one end open-ended accommodation chamber, the valve casing part or the whole of valve body subassembly is arranged in accommodation chamber, the cap body, stator module and the assembly part is integrative to be set up. The invention also provides refrigeration equipment comprising the electronic expansion valve.

According to the technical scheme, the coil is sleeved on the valve body assembly at any angle, and in the interference fit process of the plurality of matching parts of the assembly and the outer peripheral wall of the valve body assembly, the connecting arm elastically deforms under the reaction of the outer peripheral wall of the valve body assembly, so that the distance between the two matching parts is increased, the resistance of the valve body assembly and the coil in the assembly in place or in the process of being relatively far away is reduced, and the coil and the valve body assembly are simpler and more convenient to assemble and disassemble. And the connecting arm can provide the effort that the cooperation portion pressed the valve body subassembly to with the whole fixed mounting of coil on the valve body subassembly, restrict coil and valve body subassembly and break away from, can realize arbitrary angle installation of coil and valve body subassembly, and because the existence of connecting arm, make the elasticity of cooperation portion effectual, accomplish the dismouting of coil and valve body subassembly more easily.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an electronic expansion valve according to an embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of FIG. 1;

fig. 3 is a schematic diagram of a mechanism of an assembly in another embodiment of the electronic expansion valve of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				10	Valve body assembly	20	Coil
21	Stator assembly	22	Fitting assembly
				221	Ring-shaped body	222	Connecting arm
223	Mating part	11	Valve casing
				221a	Inner edge	111	First protrusion
223a	First positioning groove	223b	Reinforcing part
				223c	First positioning part	23	Cap body
223d	Auxiliary fixing part	24	Plastic body
				221b	Connecting part

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The fixed connection mode between the coil and the valve body component is high in cost, complex in assembly and inconvenient to install and detach.

The invention provides an electronic expansion valve.

In one embodiment, as shown in fig. 1 and 2, the electronic expansion valve comprises a valve body assembly 10 and a coil 20, wherein the coil 20 comprises a stator assembly 21 and a fitting 22, and the stator assembly 21 is sleeved on the periphery of the valve body assembly 10; the fitting 22 includes an annular body 221, a plurality of mating portions 223, and a connecting arm 222 connecting the annular body 221 and each mating portion 223, wherein the annular body 221 is disposed around the outer periphery of the valve body assembly 10 and fixedly connected to the stator assembly 21, and the plurality of mating portions 223 are clamped and connected to the valve body assembly 10.

Alternatively, the electronic expansion valve includes a valve body assembly 10 and a coil 20, wherein the coil 20 includes a stator assembly 21 and a fitting 22, the stator assembly 21 is cylindrical, a cavity into which the valve body assembly 10 is inserted is formed, the valve body assembly 10 includes a valve housing 11, and during installation of the coil 20 and the valve body assembly 10, the valve body assembly 10 needs to be inserted into the internal cavity of the stator assembly 21 from an open end, so that the stator assembly 21 can be sleeved on the outer periphery of the valve body assembly 10, the valve body assembly 10 includes a valve housing 11, and the valve housing 11 can be completely wrapped by the stator assembly 21 or partially wrapped by the stator assembly 21, which is not limited herein. The annular body 221 is annularly arranged on the periphery of the valve body assembly 10 and is fixedly connected with the stator assembly 21, the annular body 221 can be arranged at one end, close to the valve body assembly 10, of the stator assembly 21, when the stator assembly 21 is arranged at any angle with the valve body assembly 10, a plurality of matching parts 223 of the assembly part 22 can be contacted with and abutted against the peripheral wall of the valve body assembly 10 at the first time, at the moment, the peripheral wall of the valve body assembly 10 can provide a reaction force for the matching parts 223, and then the connecting arms 222 are elastically deformed, so that the acting force of the matching parts 223 for pressing the peripheral wall of the valve body assembly 10 is provided, the coil 20 is integrally and fixedly arranged on the valve body assembly 10, and the separation of the coil 20 and the valve body assembly 10 is limited, so that the installation of the coil 20 and the valve body assembly 10 is simpler and more convenient.

It will be appreciated that, as the valve body assembly 10 is inserted into the inner cavity of the stator assembly 21, the angle between the connecting arm 222 and the ring body 221 may be reduced, and then maintained at a constant angle, when the stator assembly 21 is sleeved on the outer periphery of the valve body assembly 10, the connecting arm 222 will always provide a force to the mating portion 223 to compress the valve body assembly 10, so that the mating portion 223 and the valve body assembly 10 are clamped and connected, the coil 20 is mounted on the valve body assembly 10 more simply and conveniently, the coil 20 and the valve body assembly 10 are mounted without being limited by angle, and any angle can be implemented. And the elastic effect of the matching part 223 is good due to the existence of the connecting arm 222, so that the assembly process of the coil 20 and the valve body assembly 10 is easier to complete.

The engaging portion 223 may be one connected to the annular body 221, or may be 2, 3, 4, or more, which is not limited herein. In this embodiment, as shown in fig. 1 and 2, in consideration of the holding strength of the fitting 22 with the outer peripheral wall of the valve body assembly 10 and the difficulty in producing the fitting 22, the fitting portions 223 may be 4 in number arranged in a circumferential array, each fitting portion 223 is provided with a connecting arm 222, one end of the connecting arm 222 is fixedly connected with the inner edge 221a of the annular body 221, the other end is fixedly connected with the fitting portion 223, a circular area may be formed between the 4 fitting portions 223 with respect to the outer surface of the valve body assembly 10, and the diameter of the circular area may be matched with the outer diameter of the valve housing 11, for example, the diameter of the circular area may be slightly smaller than the outer diameter of the valve housing 11. The 4 matching parts 223 are simultaneously held with the outer side Zhou Bika of the valve housing 11, so that the coil 20 and the valve body assembly 10 are more firmly connected, the assembly difficulty of the coil 20 and the valve body assembly 10 is reduced, and the assembly cost is reduced.

In order to ensure the structural strength of the assembly 22, the annular body 221, the plurality of mating portions 223 and the plurality of connecting arms 222 may be integrally formed, so as to be convenient for mounting and fixing with the stator assembly 21, and the annular body 221 may be fixed with an end portion of the stator assembly 21 by welding or integrally connected by injection molding, which is not limited herein.

In one embodiment, the connecting arms 222 are angled along the annular body 221.

It should be further noted that the angle between the ring body 221 and the connecting arm 222 may be an acute angle, or may be an obtuse angle, for example, 135 ° or 150 ° or 170 ° or the like, which is not limited herein. In this embodiment, considering that the thickness of the mating portion 223 is reduced as much as possible to save the production cost, the included angle between the annular body 221 and the connecting arm 222 is an obtuse angle, at this time, the deformation of the connecting arm 222 is gradually increased when the coil 20 is inserted into the valve body assembly 10 from top to bottom, so that the force of the mating portion 223 on the outer side Zhou Bika of the valve body assembly 10 is greater, and after the valve body assembly 10 and the coil 20 are assembled in place, the valve body assembly 10 and the coil 20 cannot be separated along the axial direction under the force of the connecting arm 222, so as to complete the installation of the valve body assembly 10 and the coil 20, and make the connection more stable. When disassembly is required, that is, the valve body assembly 10 and the coil 20 need to be relatively far away, a force far away from the coil 20 is applied to the valve body assembly 10 at this time, the connecting arm 222 receives an outward force, and the radius of the circular space formed between the plurality of limiting parts 223 becomes larger, so that the valve body assembly 10 and the coil 20 are easier to separate, and the disassembly of the valve body assembly 10 and the coil 20 is simpler and more convenient.

It should be noted that, in other embodiments, the parallel connection between the annular body 221 and the connecting arm 222 is also possible, and in this case, the connecting arm 222 has a smaller rigidity corresponding to the mating portion 223, and is easier to deform when receiving a radial force, so that the assembly between the valve body assembly 10 and the coil 20 is simpler, which is not limited herein.

In one embodiment, the axial cross section of the connecting arm 222 is flat plate-shaped or arc-shaped or folded-line-shaped or corrugated or multi-stage folded-shaped.

Alternatively, the cross section of the connecting arm 222 along the axial direction thereof may be a flat plate, i.e., the cross section of the connecting arm 222 along the length direction thereof is a flat plate, and the connecting arm 222 may be a connecting piece, a connecting rod, or the like, and when the cross section of the connecting arm 222 along the axial direction thereof is an arc, the connecting arm 222 may be an irregular shape as a whole, which is not limited herein. Of course, the connecting arm 222 may be formed by integrally connecting a plurality of segments of bending, and in this case, the axial section of the connecting arm 222 may be in a folded shape, a corrugated shape or a multi-segment bent shape, and the specific configuration thereof is not limited.

In an embodiment, the inner edge 221a of the annular body 221 is convexly provided with a plurality of connecting portions 221b towards the center direction, and each connecting portion 221b is correspondingly connected with each connecting arm.

Optionally, the connecting portion 221b may taper from an inner edge 221a of the annular body 221 towards the center direction, and the cross section of the connecting portion may be in a boss shape, so that when the overall circumferential width of the annular body is unchanged, the connecting arm and the matching portion connected with the connecting arm may be pushed towards the center direction, so that the elastic effect of the connecting arm is better, and after the valve body assembly and the coil are installed, the matching portion and the valve body assembly are clamped more firmly.

In one embodiment, the circumferential width of the connecting arm is less than or equal to the circumferential width of the connecting portion 221 b; the circumferential width of the connecting arm is smaller than or equal to the circumferential width of the mating portion.

Alternatively, the circumferential width of both ends of the connection arm 222 connected to the annular body 221 and the fitting portion 223 is large, and the width of the intermediate portion is small, so that the connection area between the connection arm 222 and the connection portion 221b is large, the connection strength thereof is high, and the connection arm 222 is not easily broken even if it is bent a plurality of times. It will be appreciated that when the mating portion 223 is clamped with the valve housing 11, the connecting arm 222 is mainly stressed at the connection portion between the connecting arm 222 and the annular body 221 during the compression process, so as to facilitate the deformation of the connecting arm 222, and the connecting arm 222 is easily broken from the connection portion with the annular body 221 during the long-term use process, and if the overall width of the connecting arm 222 is large, the elastic effect is poor, the installation of the coil 20 and the valve body assembly 10 is not easy, so that the circumferential width of the connecting arm 22 is smaller than or equal to the circumferential width of the connecting portion 221b, and smaller than or equal to the circumferential width of the mating portion. Therefore, in the present embodiment, in order to improve the service life of the connecting arm 222 without affecting the elastic effect of the connecting arm 222, the width of the connecting arm 222 is wider from the two ends connected with the connecting portion 221b and the mating portion, and the middle is narrower, so that the elastic effect of the connecting arm itself is better while the connection strength of the connecting arm 222 with the connecting portion 221b and the mating portion is ensured.

It should be noted that, in other embodiments, the width of the connecting arm 222 may be consistent from the end connected to the connecting portion 221b to the mating portion 223, or may be gradually narrowed and widened, or the width of the connecting arm 222 may be gradually narrowed from the end connected to the connecting portion 221b to the mating portion 223, which is not limited herein.

It will be appreciated that the connecting arm 222 acts as an elastic connection for connecting the mating portion 223 to the ring body 221, and that when the width of the connecting arm 222 is greater than the width of the mating portion 223, the connecting arm 222 is stiffer and is less prone to deformation. Taking the valve case 11 with the first protrusion 111 and the mating portion 223 with the first positioning groove 223a as an example, when a user is sleeving the coil 20 on the valve body assembly 10 at any angle, if the first positioning groove 223a on the mating portion 223 is dislocated with the first protrusion 111 on the valve case 11 in positioning fit therewith, the coil 20 can be rotated at this time to drive the assembly 22 to rotate, so that the first protrusion 111 on the valve body assembly 10 is clamped into the first positioning groove 223a, and the assembly of the coil 20 and the valve body assembly 10 is completed. If the width of the connecting arm 222 is larger than the width of the mating portion 223, the connecting arm 222 is not easy to deform, and the external force required to be used in the assembly of the coil 20 and the valve body assembly 10 needs to be larger, so that the rigidity of the connecting arm 222 is reduced by reducing the width of the connecting arm 222 to make the width of the connecting arm 222 smaller than or equal to the width of the mating portion 223, and the installation difficulty of the coil 20 and the valve body assembly 10 can also be reduced.

In one embodiment, one of the mating portion 223 and the peripheral wall of the valve body assembly 10 is provided with a first projection 111, and the other is provided with a first positioning groove 223a for inserting and positioning the first projection 111; alternatively, at least one of the engaging portions 223 is provided with the first protrusion 111, and at least one of the engaging portions 223 is provided with the first positioning groove 223a; the outer peripheral wall of the valve body assembly 10 is provided with a first positioning groove 223a corresponding to the first protrusion 111, and the outer peripheral wall of the valve body assembly 10 is provided with a first protrusion 111 corresponding to the first positioning groove 223 a.

Optionally, as shown in fig. 1, when the first protrusion 111 is disposed on the outer peripheral wall of the valve housing 11, a first positioning groove 223a is formed on a side of the mating portion 223 facing the valve housing 11, where the first positioning groove 223a may be a groove or a through hole penetrating through the entire mating portion 223, and when the coil 20 and the valve body assembly 10 are assembled in place, the first positioning groove 223a of each mating portion 223 is inserted by the first protrusion 111 of the valve housing 11, so as to avoid relative rotation after the assembly of the valve body assembly 10 and the coil 20 is completed, and at the same time, further improve the installation strength of the coil 20 and the valve body assembly 10, so as to limit the axial separation of the coil 20 and the valve body assembly 10 along the valve body assembly 10, reduce the acting force of the connecting arm 222, reduce the deformation degree of the connecting arm 222, make the installation of the coil 20 and the valve body assembly 10 more stable, and prolong the service life of the connecting arm 222.

Accordingly, when the first positioning groove 223a is provided on the outer circumferential wall of the valve housing 11, the engaging portion 223 is provided with a first protrusion 111 which is positioned to engage with the first positioning groove 223a, and the first positioning groove 223a may be a groove. It also improves the strength of the installation of the coil 20 and the valve body assembly 10 to limit the axial separation of the coil 20 and the valve body assembly 10, making the installation of the coil 20 and the valve body assembly 10 more stable.

Further, when the fitting portion 223 on the fitting 22 is plural, taking 2 fitting portions 223 on the fitting 22 as an example, one fitting portion 223 is provided with the first protrusion 111, the other fitting portion 223 is provided with the first positioning groove 223a (not shown), at this time, the valve housing 11 is provided with the first protrusion 111 corresponding to the first protrusion 111, the valve housing 11 is provided with the first protrusion 111 corresponding to the first positioning groove 223a, when the coil 20 and the valve body assembly 10 are assembled in place, the first protrusion 111 of one fitting portion 223 is clamped into the first positioning groove 223a of the valve housing 11, and the first protrusion 111 on the valve housing 11 is inserted into the first positioning groove 223a of the other fitting portion 223, which can also enhance the installation strength of the coil 20 and the valve body assembly 10 to limit the axial separation of the coil 20 and the valve body assembly 10, so that the installation of the coil 20 and the valve body assembly 10 is more stable, and simultaneously, after the coil 20 and the valve body assembly 10 are assembled, the installation angle between the coil 20 and the valve body assembly 10 can be accurately positioned.

In one embodiment, the outer surface of the first protrusion 111 is arc-shaped.

Alternatively, when the first protrusion 111 is protruded on a side surface of the fitting portion 223 facing the valve body assembly 10, the first protrusion 111 may generate interference friction with the outer circumferential wall of the valve housing 11 before the valve body assembly 10 and the coil 20 are assembled in place, and the outer surface of the first protrusion 111 may be arc-shaped, for example, the first protrusion 111 may be a convex bubble, a hemispherical protrusion, or an ellipsoidal protrusion, etc., which may greatly reduce the friction coefficient with the outer circumferential wall of the valve housing 11, so that the assembly of the coil 20 and the valve body assembly 10 is simpler. Correspondingly, when the first protrusion 111 is arranged on the outer peripheral wall of the valve housing 11, in the assembling process of the coil 20 and the valve body assembly 10, the first protrusion 111 can generate interference friction with the outer surface of the assembling part, and at the moment, the outer surface of the first protrusion 111 on the valve housing 11 is arranged into an arc shape, so that the friction coefficient with the outer peripheral wall of the valve housing 11 is greatly reduced, the assembling of the coil 20 and the valve body assembly 10 is simpler, the abrasion in the assembling and disassembling processes of the coil 20 and the valve body assembly 10 is reduced, and the service life of the electronic expansion valve is prolonged.

Of course, in other embodiments, the outer surface of the first protrusion 111 may be a plane, for example, the first protrusion 111 is a square, which is not limited herein.

In yet another embodiment (not shown), the outer peripheral wall of the valve body assembly 10 is provided with a second positioning groove corresponding to each of the engaging portions 223 in a clamping fit with the engaging portion 223.

Optionally, in this embodiment, the size of each second positioning groove is matched with the size of the corresponding mating portion 223, that is, when the valve body assembly 10 and the coil 20 are assembled together, each mating portion 223 is clamped in the corresponding second positioning groove of the valve housing 11 to limit the relative rotation between the coil 20 and the valve body assembly 10, and simultaneously, the connection between the valve body assembly 10 and the coil 20 is more stable. In the assembly process of the coil 20, the matching part 223 is abutted against the peripheral wall of the valve housing 11, so that the connecting arm 222 is elastically deformed, when the matching part 223 corresponds to the second positioning groove on the shell wall of the valve housing 11, the acting force of the valve housing 11 on the connecting arm 222 is reduced, the connecting arm 222 recovers certain deformation, the matching part 223 is driven to be clamped into the second positioning groove, the assembly of the valve body assembly 10 and the coil 20 is completed, the acting force of the connecting arm 222 is reduced, the deformation degree of the connecting arm 222 is reduced, the installation of the coil 20 and the valve body assembly 10 is firmer, and the service life of the connecting arm 222 is longer.

In one embodiment, the mating portion 223 is plate-shaped or spherical or hemispherical.

Alternatively, the mating portion 223 may be a plate, such as a square spring, a square plate, or another irregularly shaped plate, which is not limited herein. Of course, in other embodiments, the mating portion 223 may be spherical or hemispherical, or have other irregular shapes, and the valve housing 11 may be provided with a second groove corresponding to the location of the mating portion 223, so that the mating portion 223 is snapped into place, which is not limited to the specific shape of the mating portion 223, as long as it can clamp the fixed coil 20 and the valve body assembly 10.

In one embodiment, the mating portion 223 has a first end and a second end disposed along an axial direction of the fitting 20, the connecting arm 222 being connected to the first end, or the connecting arm 22 being connected to the second end; or connecting arm 222 is connected between the first end and the second end.

Alternatively, the connecting arm 222 may be connected to the upper end of the mating portion 223, or may be connected to the lower end of the mating portion 223 or to a side of the mating portion 223 facing away from the valve body assembly 10, which is not limited herein. In this embodiment, as shown in fig. 1 and 2, the first end and the second end of the fitting 20 may be defined as an upper end and a lower end of the fitting, respectively, and the connection arm 222 is connected to the upper end of the fitting 223, and the angle between the connection arm 222 and the fitting 223 is an obtuse angle.

In another embodiment, as shown in fig. 3, taking 2 mating portions 223 of the fitting 22 as the opposite sets as an example, in this embodiment, the connecting arm 222 is disposed obliquely downward from the position of the annular body 221, so that an included angle between the connecting arm 222 and the annular body 221 is an obtuse angle, the connecting arm 222 is connected to the lower end of the mating portion 223, and the connecting arm 222 and the mating portion 223 may adopt an arc transition connection to improve the connection strength thereof. At this time, the included angle between the connecting arm 222 and the mating portion 223 is an acute angle, that is, the mating portion 223 is inclined obliquely upward from the mating position with the connecting arm 222, so that the space occupied by the whole assembly 22 in the axial direction is smaller, and the installation of the coil 20 and the valve body assembly 10 is more stable, and meanwhile, the overall structure of the electronic expansion valve is more compact.

It should be noted that, in other embodiments, the connection arm 222 is also possible to connect between the first end and the second end of the mating portion 223, which is not limited herein.

In one embodiment, the annular body 221 has a reinforcing portion 223b protruding from an inner edge 221a between two adjacent mating portions 223 in a center direction, and the reinforcing portion 223b and the connecting portion 221b are spaced apart.

Alternatively, the ring body 221 may be an annular plate having a relief hole therein, and the valve body assembly 10 first needs to pass through the relief hole of the annular plate and then into the interior space of the stator assembly 21 when the coil 20 and the valve body assembly 10 are installed. The center of the avoidance hole may be coaxially disposed with the axis of the stator assembly 21, in this embodiment, one end of the connecting arm 222 is connected to the inner edge 221a of the annular body 221, and is disposed at an included angle with the annular body 221, so that the overall width of the annular plate may be narrower, so that a longer length of the connecting arm 222 is reserved along the circumferential direction of the annular plate, so that the overall elastic performance of the connecting arm 222 is better. In order to strengthen the strength of the annular body 221, the inner edge 221a of the annular body 221 between the two matching parts 223 is convexly provided with a strengthening part 223b towards the center direction, so as to increase the width of the annular body 221, make the connection area between the annular body 221 and the stator assembly 21 larger, improve the structural strength of the annular body 221, and simultaneously increase the connection strength between the stator assembly 21 and the annular body 221. And the reinforcement portion 223b and the connection portion 221b are provided at a distance without interfering with the deformation of the connection arm 222.

In an embodiment, as shown in fig. 1, a side of the annular body 221 facing the stator assembly 21 is provided with a first positioning portion 223c, and a side of the stator assembly 21 facing the annular body 221 is correspondingly provided with a second positioning portion matched with the first positioning portion 223c in a positioning manner; the first positioning portion 223c is a protrusion, and the second positioning portion is a groove; alternatively, the first positioning portion 223c is a groove, and the second positioning portion is a protrusion.

Optionally, a first positioning portion 223c is disposed on a side of the annular body 221 facing the stator assembly 21, and a second positioning portion is correspondingly disposed on a side of the stator assembly 21 facing the annular body 221, when the annular body 221 is mounted on the stator assembly 21, the first positioning portion 223c is clamped into the second positioning portion, so as to avoid circumferential offset between the annular body 221 and the stator assembly 21, and improve connection reliability. In this embodiment, from the viewpoint of facilitating the production of the stator assembly 21 and the ring body 221, the first positioning portion 223c may be a cylindrical protrusion, and the second positioning portion may be a groove adapted to the cylindrical protrusion, and the cylindrical protrusion may be inserted into the groove when the ring body 221 is mounted on the stator assembly 21, so as to avoid circumferential offset between the ring body 221 and the stator assembly 21.

Of course, in other embodiments, the first positioning portion 223c may be a groove, and the second positioning portion may be a protrusion, which is not limited in shape. The stator assembly 21 may be connected to the annular body 221 by injection molding, or may be fixed by welding, which is not limited herein.

In one embodiment, the annular body 221 is provided with a plurality of second grooves or through holes at intervals along the axial direction, and the stator assembly 21 is formed by injection molding to form a molding body 24 including the stator assembly 21 and the annular body 221, and the molding body 24 fills the second grooves or through holes.

Optionally, the annular body 221 is provided with second grooves or through holes disposed at intervals along the axial direction, and for convenience of explanation, the second grooves or through holes are defined as auxiliary fixing portions 223d, which may be 1 or 2, 3 or more, and are not limited herein. In this embodiment, the stator assembly 21 and the ring body 221 are integrally formed by injection molding to form the molding body 24 wrapping the outer periphery of the stator assembly 21 and the ring body 221, so as to increase the connection strength between the assembly 22 and the stator assembly 21, and at this time, since the ring body 221 is provided with the auxiliary fixing portion 223d, during the injection molding process, the melted plastic will flow into and fill the auxiliary fixing portion 223d, so that the connection between the molding body 24 and the ring body 221 obtained by molding is more stable.

In one embodiment, the fitting 22 is a metal piece.

It should be noted that, under normal conditions, the signal applied to the coil 20 is a low-voltage dc pulse signal, but under specific conditions, the coil 20 will be changed into a high-voltage or ultra-high-voltage signal due to the influence of installation environment, magnetic field interference, lightning impulse, etc., therefore, the magnetizer in the stator assembly 21 needs to be reliably grounded to the outside through the refrigerant pipeline of the refrigeration system, so the stator assembly 21 needs to be electrically connected with the valve housing 11 of the electronic expansion valve during the design of the electronic expansion valve, so as to improve the reliability of the electronic expansion valve.

In one embodiment, the annular body is a circular plate, or the annular body is formed into an annular shape by a plurality of circular arcs.

Alternatively, the ring body may be a whole circular plate, or may be a ring formed by connecting and enclosing a plurality of circular arcs, such as petal-shaped, etc., where the specific shape is not limited, and the user may choose the ring according to his/her own choice.

In an embodiment, the coil 20 further includes a cap 23, the cap 23 covers an end of the stator assembly 21 facing away from the assembly 22, the cap and the coil 20 enclose a receiving cavity with an opening at one end, the valve housing 11 of the valve body assembly 10 is partially or completely disposed in the receiving cavity, and the cap 23, the stator assembly 21 and the assembly 22 are integrally disposed.

Optionally, a cap 23 is disposed on an end of the stator assembly 21 facing away from the assembly 22, for sealing an internal cavity of the stator assembly 21, the cap 23 and the coil 20 enclose to form a containing cavity with an open end, and after the coil 20 is mounted on the valve body assembly 10, an inner peripheral wall of the cap 23 abuts against an end of the valve housing 11 extending out of the stator assembly 21, so as to limit axial positions of the coil 20 and the valve body assembly 10. The cap may be fixed on the stator assembly 21 by welding, or may be integrally formed with the stator assembly 21 and the assembly 22 by injection molding, and is wrapped in the molding body 24, which is not limited herein.

The invention also provides a refrigeration device, which comprises an electronic expansion valve, and the specific structure of the electronic expansion valve refers to the embodiment, and because the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. An electronic expansion valve, comprising:

a valve body assembly;

2. The electronic expansion valve of claim 1, wherein said connecting arm is disposed at an angle to said annular body.

3. The electronic expansion valve according to claim 1, wherein the cross section of the connecting arm along the axial direction of the annular body is flat or arc-shaped or folded or corrugated or multi-stage folded.

4. The electronic expansion valve according to claim 1, wherein a plurality of connecting portions are provided on an inner edge of the annular body in a protruding manner toward a center direction, and each of the connecting portions is connected to each of the connecting arms.

5. The electronic expansion valve of claim 4, wherein a circumferential width of said connecting arm is less than or equal to a circumferential width of said connecting portion;

6. The electronic expansion valve according to claim 1, wherein one of the fitting portion and the peripheral wall of the valve body assembly is provided with a first projection, and the other is provided with a first positioning groove for insertion positioning of the first projection;

7. The electronic expansion valve of claim 6, wherein the outer surface of the first protrusion is arcuate.

8. The electronic expansion valve according to claim 1, wherein the fitting portion is plate-like or spherical or hemispherical.

9. The electronic expansion valve of claim 1, wherein said mating portion has a first end and a second end disposed along an axial direction of said fitting, said connecting arm being connected to said first end or said connecting arm being connected to said second end; or, the connecting arm is connected between the first end and the second end.

10. The electronic expansion valve according to claim 4, wherein the annular body is provided with a reinforcing portion protruding in a direction of a center of a circle at an inner edge between two adjacent connecting portions, and the reinforcing portion and the connecting portions are arranged at a distance.

11. The electronic expansion valve of claim 1, wherein a first positioning portion is provided on a side of the annular body facing the stator assembly, and a second positioning portion in positioning fit with the first positioning portion is provided on a side of the stator assembly facing the annular body;

12. The electronic expansion valve of claim 1, wherein the annular body is circumferentially provided with a plurality of second grooves or through holes arranged at intervals, the annular body and the stator assembly are injection molded to form a molding body wrapping the stator assembly and the annular body, and the molding body fills the second grooves or the through holes.

13. The electronic expansion valve of claim 1, wherein the fitting is a metal piece.

14. The electronic expansion valve of claim 1, wherein the annular body is a circular plate; or (b)

The ring body is formed into a ring shape by a plurality of circular arcs.

15. The electronic expansion valve of claim 1, wherein the coil further comprises a cap covering an end of the stator assembly facing away from the fitting, the cap enclosing the coil to form a receiving cavity with an opening at one end, the valve housing of the valve body assembly being partially or entirely disposed within the receiving cavity, the cap, the stator assembly and the fitting being integrally disposed.

16. A refrigeration device comprising an electronic expansion valve according to any one of claims 1-15.