CN114484050A

CN114484050A - Electronic expansion valve and refrigeration equipment

Info

Publication number: CN114484050A
Application number: CN202210393136.8A
Authority: CN
Inventors: 唐文博; 陈超; 曾庆军; 黄龙华
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: 2022-05-13
Anticipated expiration: 2042-04-15
Also published as: CN114484050B

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 is provided with a stator shell and a plastic shell wrapping the stator shell, the stator shell is provided with a channel which extends along the axial direction of the stator shell, and the valve body assembly penetrates through the channel so that the coil is sleeved on the periphery of the valve body assembly; the assembly part comprises an annular body and a plurality of matching parts connected with the annular body, and the matching parts are connected with the valve body assembly in a clamping manner; the annular body is fixedly connected with one axial end of the stator shell, and the insulating material coats the annular body and the stator shell to form a plastic shell. The assembly part of the electronic expansion valve is simpler to connect with the stator shell, the connection strength is higher, the coil can be sleeved on the valve body assembly at any angle, the connection between the coil and the valve body assembly is simpler and more convenient, and the installation at any angle can be realized.

Description

Electronic expansion valve and refrigeration equipment

Technical Field

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

Background

In the related art, the coil of the electronic expansion valve and the valve body are basically fixed by welding, so that the fixing cost is high, and the electronic expansion valve is inconvenient to mount and dismount.

Aiming at the problem, in the related art, the intermediate piece is additionally arranged on the coil and connected with the valve body, but the structure of the intermediate piece is complex, the connection difficulty of the intermediate piece and the coil is high, and the connection is not firm, so that the weight of the whole electronic expansion valve is large.

Disclosure of Invention

The invention mainly aims to provide an electronic expansion valve and refrigeration equipment, and aims to solve the problem that a coil of the electronic expansion valve is difficult to connect with an intermediate piece in the prior art.

In order to achieve the above object, the present invention provides an electronic expansion valve comprising:

a valve body assembly;

the coil is provided with a stator shell and a plastic shell wrapping the stator shell, the stator shell is provided with a channel extending along the axial direction of the stator shell, and the valve body assembly penetrates through the channel so that the coil is sleeved on the periphery of the valve body assembly;

the assembly part comprises an annular body and a plurality of matching parts connected with the annular body, and the matching parts are connected with the valve body assembly in a clamping way;

the annular body is fixedly connected with one axial end of the stator shell, and an insulating material coats the annular body and the stator shell to form the plastic shell.

Optionally, the coil is provided with a cover body, the cover body is mounted at one end of the stator shell far away from the assembly part to cover the channel, and the plastic shell is connected with the cover body;

the stator housing has magnetic pole teeth on an inner side thereof, the magnetic pole teeth being disposed in the channel.

Optionally, the cover body is in a cap shape, the cover body is provided with a cap body and a brim, the cap body is provided with an accommodating cavity for the valve body assembly to penetrate through the partial accommodating of the channel, and the brim is erected on the stator shell.

Optionally, the cap body is provided with a bottom plate, the periphery of the bottom plate extends along the axial direction of the coil to form a ring on the side wall of the valve body assembly, and one end of the side wall, far away from the bottom plate, protrudes outwards along the radial direction of the coil to form the brim.

Optionally, the cap body and the brim are integrally formed, and both the cap body and the brim are made of metal materials;

or the brim is made of metal, the cap body is made of nonmetal, and the plastic shell and the cap body are integrally formed.

Optionally, the cap body and the brim are made of non-metal materials, and the brim is welded and fixed with the plastic shell.

Optionally, the fitting is a metal piece.

Optionally, a pouring gate is arranged on the peripheral wall of the stator housing.

Optionally, the fitting is provided with a connecting arm connecting the annular body and each of the mating portions.

Optionally, the fitting part has a first end and a second end arranged in an axial direction of the fitting part, the connecting arm being connected to the first end;

or, the connecting arm is connected to the second end;

alternatively, the connecting arm is connected between the first and second ends.

Optionally, one of the fitting portion and the outer peripheral wall of 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 periphery wall of valve body subassembly corresponds first protruding position is provided with first constant head tank, the periphery wall of valve body subassembly corresponds first constant head tank position is provided with first arch.

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

Optionally, a first positioning portion is disposed on one side of the annular body facing the stator casing, and a second positioning portion in positioning fit with the first positioning portion is correspondingly disposed on one side of the stator casing 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 circumferentially provided with a plurality of second grooves or through holes arranged at intervals, the annular body and the stator housing are molded to form a plastic shell wrapping the stator housing and the annular body, and the plastic shell is filled in the second grooves or the through holes.

The invention also provides refrigeration equipment comprising the electronic expansion valve.

According to the technical scheme, the annular body of the assembly part is fixedly arranged at one axial end of the stator shell, the annular body and the stator shell are coated by the insulation material in a molten state to obtain the plastic shell, the stator shell, the annular body and the plastic shell form a whole, so that the assembly part and the stator shell are simpler to connect, the connection strength is higher, when the coil and the valve body assembly are axially arranged, the coil and the valve body assembly only need to be axially opposite, the specific positions of the coil and the valve body assembly are not required to be aligned, namely the coil can be sleeved on the valve body assembly at any angle, the matching parts of the assembly part and the outer peripheral wall of the valve body assembly are mutually clamped, the connection of the coil and the valve body assembly is simpler and more convenient, and the assembly difficulty is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an assembly structure of a coil and an assembly member in an embodiment of an electronic expansion valve according to the present invention;

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

FIG. 3 is a schematic structural diagram of an electronic expansion valve according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of an electronic expansion valve according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of an electronic expansion valve according to another embodiment of the present invention;

fig. 6 is a schematic structural view of a mounting member in an electronic expansion valve according to another embodiment of the present invention.

The reference numbers indicate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Valve body assembly	20	Coil
30	Cover body	21	Stator housing
				22	Channel	23	Magnetic pole tooth
24	Plastic shell	111	First bump
				31	Cap body	32	Brim of hat
311	Base plate	312	Side wall
				33	Containing cavity	40	Assembly part
41	Annular body	42	Mating part
				43	Connecting arm	411	Auxiliary fixing part
412	A first positioning part	41a	Inner edge
				41b	Connecting part		41c	Reinforcing part
421	A first positioning groove

The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment 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 relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention provides an electronic expansion valve and refrigeration equipment, aiming at the problem that the connection difficulty between a coil of the electronic expansion valve and a middleware is high in the prior art.

In one embodiment, as shown in fig. 1, 2 and 3, the electronic expansion valve includes a valve body assembly 10, a coil 20 and a fitting 40, wherein the coil 20 has a stator housing 21 and a plastic housing 24 enclosing the stator housing 21, the stator housing 21 has a passage 22 extending along an axial direction (a direction in fig. 1) thereof, and the valve body assembly 10 passes through the passage 22 to allow the coil 20 to be fitted around an outer circumference of the valve body assembly 10; the assembly member 40 includes an annular body 41 and a plurality of matching portions 42 connected to the annular body 41, the annular body 41 is disposed around the valve body assembly 10 and is fixedly connected to one axial end of the stator housing 21, and the plurality of matching portions 42 are connected to the valve body assembly 10 in a clamping manner; the annular body 41 is connected with one axial end of the stator housing 21, the annular body 41 and the stator housing 21 are coated by an insulating material to form the plastic housing 24, and the stator housing 21, the annular body 41 and the plastic housing 24 form a whole, so that the connection strength of the assembly part 40 and the coil 20 is higher, the whole production of the electronic expansion valve is simpler and more convenient, and the structure of the assembly part 40 is simple.

Optionally, the plastic shell 24 may be made of an insulating material such as a nonmetal, for example, resin, so that the outer wall of the coil 20 has an insulating function, thereby improving the safety performance of the coil 20. The coil 20 may be in the shape of a hollow cylinder, and the stator casing 21 of the coil 20 is made of a metal material, such as a cold-rolled sheet, so that the stator casing 21 has both conductivity and permeability. The stator housing 21 has a hollow structure and is further provided with a winding, the stator housing 21 may be in a hollow cylindrical shape, a hollow space for installing the winding is provided between an inner wall and an outer wall of the stator housing, and the winding is wound in the hollow space of the stator housing 21. The valve body assembly 10 passes through a passage 22 through the stator housing 21 to be mounted with the entire coil 20. The annular body 41 is annularly arranged on the periphery of the valve body assembly 10 and fixedly connected with one axial end of the stator housing 21, the annular body 41 can be fixed at one axial end, close to the valve body assembly 10, of the stator housing 21 by welding in advance, or the annular body 41 and the stator housing 21 can be axially overlapped and then pass through a molten insulating material, such as resin and the like, so as to form the plastic housing 24 by coating the stator housing 21 and the annular body 41, and the annular body 41 is fixedly connected on the stator housing 21, so that the stator housing 21, the annular body 41 and the plastic housing 24 form a whole, the connection strength of the assembly part 40 and the coil 20 is higher, and the assembly is more stable and has a simple structure.

When the coil 20 is installed with the valve body assembly 10, the valve body assembly 10 passes through the channel 22 along the axial direction of the coil 20, the plurality of matching portions 42 of the assembly member 40 can contact and abut against the outer peripheral wall of the valve body assembly 10, at this time, the outer peripheral wall of the valve body assembly 10 can provide a reaction force for the matching portions 42, the matching portions 42 provide an acting force for pressing the outer peripheral wall of the valve body assembly 10 under the action of self elastic force, so that the coil 20 is integrally and fixedly installed on the valve body assembly 10, the coil 20 is limited to be separated from the valve body assembly 10, the installation of the coil 20 and the valve body assembly 10 is simpler and more convenient, when the coil 20 and the valve body assembly 10 are installed along the axial direction, only the axial direction is opposite, the specific position alignment of the coil 20 and the valve body assembly 10 is not considered, namely, the coil 20 can be sleeved on the valve body assembly 10 at any angle and fixedly installed with the coil. The valve body assembly 10 has a valve housing that may be fully inserted into the passage 22 or partially disposed within the passage 22, without limitation.

In one embodiment, the coil 20 is provided with a cover 30, the cover 30 is mounted on an end of the stator housing 21 away from the assembly 40 to cover the channel 22, and the plastic housing 24 is connected with the cover 30; the stator housing 21 has magnetic pole teeth 23 on the inside, and the magnetic pole teeth 23 are placed in the channel 22.

Alternatively, the plastic shell 24 may be connected to the outer side of the side wall 312 of the cover 30, or may be coated on the cover 30, which is not limited herein. As shown in fig. 1, in the present embodiment, taking the plastic case 24 as an example of injection molding of resin, when it is required to perform injection molding on the stator housing 21 of the coil 20 and the cover 30 to form the plastic case 24, an end of the coil 20 connected with the cover 30 is disposed upward, that is, the cover 30 covers an upper end opening of the channel 22, so that the melted resin is blocked by the cover 30 when flowing through the position of the cover 30, and the plastic case 24 covering the cover 30 and the stator housing 21 is formed to integrally connect the cover 30 and the coil 20. In the molding process of the plastic shell 24, the molten resin does not flow into the channel 22 from the opening at the upper end of the channel 22, and after the plastic shell 24 of the coil 20 is injection molded, the resin does not exist in the channel 22 of the coil 20, so that the gap between the magnetic pole teeth 23 arranged in the channel 22 is prevented from being filled with the resin, the performance of the electronic expansion valve is improved, and the function of the magnetic pole teeth 23 is ensured not to be damaged.

When the coil 20 and the valve body assembly 10 of the electronic expansion valve are assembled, the valve body assembly 10 can be inserted into the channel 22 of the stator housing 21 from the end, connected with the assembly part 40, of the coil 20, the peripheral wall of the valve body assembly 10 is in contact with the magnetic pole teeth 23, the valve body assembly 10 and the coil 20 can be nested together, the cover body 30 can limit the valve body assembly 10 inserted into the channel 22 of the stator housing 21, the coil 20 and the valve body assembly 10 are more simply and conveniently installed, meanwhile, the matching parts 42 of the assembly part 40 and the peripheral wall of the valve body assembly 10 are clamped and fixed, and the coil 20 and the valve body assembly 10 are more simply and conveniently assembled.

In an embodiment, the cover 30 is in a cap shape and is provided with a cap body 31 and a visor 32, the cap body 31 has a receiving cavity 33 for receiving the valve body assembly 10, and the visor 32 is overlapped on the stator housing 21.

Optionally, when the cover 30 is in a cap shape and is connected to one end of the stator housing 21, under the condition that the axial length of the coil 20 is kept unchanged, the length of the valve housing portion of the valve body assembly 10, which can be wrapped by the coil 20 and the cover 30, is longer, and the end of the valve body assembly 10, which extends out of the coil 20, can abut against the cavity wall of the accommodating cavity 33 of the cap 31, so that the axial positioning during the installation of the valve body assembly 10 and the coil 20 is realized, and the application range of the electronic expansion valve is wider. The brim 32 is arranged on the stator housing 21, so that the contact area of the cover 30 and the upper end face of the stator housing 21 is larger, the connection is tighter, and the connection strength of the cover 30 and the stator housing 21 is enhanced.

In an embodiment, the cap body 31 is provided with a bottom plate 311, a periphery of the bottom plate 311 extends along an axial direction of the coil 20 to form a ring on a side wall 312 of the valve body assembly 10, and an end of the side wall 312 away from the bottom plate 311 protrudes outward along a radial direction (e.g., a direction B in fig. 1) of the coil 20 to form the visor 32.

Alternatively, the bottom plate 311 may be circular, the periphery of the bottom plate 311 is protruded toward the direction close to the valve body assembly 10 to form a cylindrical side wall 312, the bottom plate 311 and the side wall 312 enclose a cavity for inserting a valve housing, the inner diameter of the side wall 312 may be adapted to the outer diameter of the valve housing, so that the cover 30 is more smoothly installed around the valve housing along with the coil 20 in a rotating manner, wherein one end of the side wall 312, which is far away from the bottom plate 311, protrudes outward along the radial direction of the coil 20 to form the visor 32, and the visor 32 may be fixed to the stator housing 21 by welding, or may be integrally provided with the stator housing 21 by injection molding, which is not limited herein. The visor 32 may be an annular plate, or may be a plate with an inner circle and an outer circle, which is not limited herein.

In another embodiment, as shown in fig. 4, the cap 31 and the visor 32 are integrally formed, and both the cap 31 and the visor 32 are made of metal.

Optionally, in this embodiment, as shown in fig. 4, the cap body 31 and the brim 32 are both made of a metal material, the brim 32 is erected on the upper end surface of the stator housing 21, and may be welded and fixed with the stator housing 21 in advance, so that the sealing effect on one end of the channel 22 of the coil 20 is better, and in the process of forming the plastic housing 24 on the outer surface of the stator housing 21 through injection molding of molten resin, the molten resin does not penetrate into the channel 22 from the opening at the upper end of the stator housing 21, so that a gap between the magnetic pole teeth 23 disposed in the channel 22 is filled with the resin, and the overall performance of the electronic expansion valve is better. The molten resin can cover the visor 32 and the cap body 31 to form the plastic housing 24, and the cover 30 and the stator housing 21 are connected into a whole, so that the structure of the electronic expansion valve is more stable.

In the present embodiment, the portion of the valve body assembly 10 passing through the passage 22 may be in contact with the bottom plate 311, or may be in contact with the inner wall surface of the visor 32 in the circumferential direction thereof.

In one embodiment, the fitting 40 is a metal piece.

It should be noted that, normally, the signal applied to the coil 20 is a low-voltage dc pulse signal, but in a specific situation, the coil 20 may be changed into a high-voltage or ultra-high-voltage signal by the installation environment, magnetic field interference, lightning impulse, etc., and therefore, it is necessary to reliably connect the magnetizer in the stator casing 21 to the outside through the refrigerant pipeline of the refrigeration system, so that the stator casing 21 needs to be conductively connected with the valve casing of the electronic expansion valve when the electronic expansion valve is designed, so as to improve the reliability of the electronic expansion valve, in this embodiment, the assembling member 40 is made of metal, such as stainless steel, copper, iron, etc., when the coil 20 is installed on the valve body assembly 10, the valve casing, the assembling member 40, the cover 30 and the stator casing 21 of the coil 20 are sequentially connected, so that the magnetizer in the stator casing 21 and the valve casing of the electronic expansion valve are conductively connected through the assembling member 40 made of metal and the cover 30 made of metal, the reliability of the electronic expansion valve is improved.

In one embodiment, the visor 32 is made of metal, the cap 31 is made of non-metal, and the cap 31 and the plastic shell 24 are integrally formed.

Alternatively, in the present embodiment, as shown in fig. 3, the a direction is an axial direction of the valve body assembly 10, and the B direction is a radial direction of the valve body assembly 10. The brim 32 is in a circular plate shape made of metal, the whole cap body 31 is made of non-metal materials, and the cap body 31 and the plastic shell 24 are integrally formed through injection molding, so that the cap body 31 and the brim 32 do not need to be fixedly connected, the weight of the electronic expansion valve can be reduced, and the production cost of the electronic expansion valve can be reduced. When in processing, the metal visor 32 and the stator housing 21 may be fixed by welding in advance, or the metal visor 32 may be directly erected on the upper end surface of the stator housing 21, the coil 20 is placed in a mold, a mold having an inner space matched with the size of the cap body 31 is placed on the metal visor 32, and the mold and the coil 20 are coaxially arranged, taking the insulating material as resin for example, the stator housing 21, the visor 32 and the mold are encapsulated in the mold by molten resin, and the integrally formed plastic housing 24 is obtained after cooling, thereby greatly reducing the production cost and difficulty of the coil 20.

Further, in this embodiment, the assembly member 40 may be made of a metal material such as stainless steel, copper, iron, etc., and after the valve body assembly 10 and the coil 20 are assembled, the inner peripheral wall of the metal visor 32 is in contact with the outer peripheral wall of the valve housing, and the valve housing, the assembly 40, the visor 32 and the stator housing 21 of the coil 20 are also sequentially conducted to electrically connect the coil 20 and the valve body assembly 10 of the electronic expansion valve, so that, when the coil 20 generates an instantaneous pulsed voltage of several thousand volts (e.g., a lightning strike, etc.), the current in the coil 20 is conducted through the fitting 40 to the valve housing of the valve body assembly 10, and further conducted out through the valve housing (e.g., to the ground), so that electric discharge is less likely to occur between the magnetic pole teeth 23 and the valve housing, thereby avoiding interfering with surrounding circuits or breaking down the valve body assembly 10 of the electronic expansion valve and improving the reliability of the electronic expansion valve.

In another embodiment, as shown in fig. 5, the cap 31 and the visor 32 are made of a non-metal material, and the visor 32 is welded and fixed to the plastic housing 24.

Alternatively, in the present embodiment, in order to further reduce the weight of the electronic expansion valve, the non-metal cap 31 and the brim 32 may be integrally formed and processed, and the cover 30 is a plastic cap for example. During processing, the coil 20 is placed in a mold, a cap-shaped mold with the same size and shape as the cover 30 made of the non-metallic material is placed on the upper end surface of the stator housing 21, and the mold and the coil 20 are arranged coaxially. Taking the insulating material as an example, the molten resin encapsulates the periphery of the stator housing 21 in the mold and is connected to the peripheral wall of the brim 32 of the hat-shaped mold, and the plastic shell 24 which covers the stator housing 21 and is provided with the installation position for installing the cover 30 is obtained after cooling and molding, at this time, a pre-processed plastic hat can be placed at the installation position, and the brim 32 and the plastic shell 24 are connected and fixed by ultrasonic welding, compared with the case that the whole or part of the cover 30 is made of a metal material, the weight of the electronic expansion valve can be further reduced, and the production cost is saved.

In one embodiment, the outer peripheral wall of the stator housing 21 is provided with a gate.

Alternatively, at the time of injection molding, the coil 20 may be placed in a mold, and the cover 30 is fixed above the stator housing 21 by welding in advance, so as to prevent relative displacement between the cover 30 and the stator housing 21 during the injection molding process for forming the molded case 24. Set up the sprue gate on stator housing 21's periphery wall, at the injecting glue in-process, when the lid 30 is flowed through to molten resin, it can not be detained at the junction of lid 30 and stator housing 21 for a long time, can not permeate the passageway 22 from the joint gap between lid 30 and the stator housing 21 in, avoid filling insulating material between the gap of a plurality of magnetic pole teeth 23, can further improve coil 20's stability.

In one embodiment, as shown in fig. 2 and 3, the fitting member 40 is provided with a connecting arm 43 connecting the annular body 41 and each of the fitting portions 42.

It can be understood that, during the assembly process, as the more the valve body assembly 10 is inserted into the channel 22 of the stator housing 21, the included angle between the connecting arm 43 and the annular body 41 can be reduced, and then maintained at a constant angle, when the coil 20 is sleeved on the periphery of the valve body assembly 10, the connecting arm 43 will always provide an acting force for the matching portion 42 to compress the valve body assembly 10, so that the matching portion 42 and the valve body assembly 10 are connected in a clamping manner, and the coil 20 is more easily and conveniently mounted on the valve body assembly 10, and when the coil 20 and the valve body assembly 10 are mounted in the axial direction, as long as the axial direction is opposite, the specific positions of the coil 20 and the valve body assembly 10 are not considered to be aligned, and the assembly difficulty is reduced. Due to the connecting arm 43, the elasticity of the fitting portion 42 is made good, and the assembly process of the coil 20 and the valve body assembly 10 is more easily completed.

It should be noted that the number of the matching portions 42 may be 2, or 3, 4 or more, which are connected to the two opposite sides of the annular body 41, and is not limited herein. In the present embodiment, as shown in fig. 2 and 3, in consideration of the holding strength of the fitting 40 with the outer peripheral wall of the valve body assembly 10 and the production difficulty of the fitting 40, the number of the fitting portions 42 may be 4, and each fitting portion 42 is correspondingly provided with one connecting arm 43, one end of the connecting arm 43 is fixedly connected with the inner edge 41a of the annular body 41, and the other end is fixedly connected with the fitting portion 42, and a circular area may be formed between the outer surfaces of the 4 fitting portions 42 facing the valve body assembly 10, and the diameter of the circular area matches with the outer diameter of the valve housing, or the diameter of the circular area is slightly smaller than the outer diameter of the valve housing. 4 cooperation portions 42 are held with the periphery wall card of valve casing simultaneously to make coil 20 and valve body subassembly 10 be connected more firm the time, reduced the assembly degree of difficulty of coil 20 and valve body subassembly 10, reduce assembly cost.

And in order to ensure the structural strength of the assembly member 40, the annular body 41, the plurality of fitting portions 42, and the plurality of connecting arms 43 may be integrally formed.

In one embodiment, the connecting arms 43 are angled relative to the annular body 41.

It should be further noted that the included angle between the annular body 41 and the connecting arm 43 may be an acute angle, or may be an obtuse angle, such as 135 °, 150 °, or 170 °, which is not limited herein. In this embodiment, the thickness of the matching portion 42 is reduced as much as possible to save the production cost, an included angle between the annular body 41 and the connecting arm 43 is an obtuse angle, at this time, the coil 20 is inserted into the valve body assembly 10 from top to bottom, the deformation of the connecting arm 43 is gradually increased, so that the matching portion 42 has a larger clamping acting force on the outer peripheral wall of the valve body assembly 10, 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 axially separated under the acting force of the connecting arm 43, so that the valve body assembly 10 and the coil 20 are installed, and the connection is more stable. When disassembly is required, that is, the valve body assembly 10 and the coil 20 need to be relatively far away, and a force far away from the coil 20 is applied to the valve body assembly 10, the connecting arm 43 is subjected to an outward acting force, and the radius of the circular space formed between the plurality of matching parts 42 is increased, so that the valve body assembly 10 and the coil 20 are more easily separated, 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 annular body 41 and the connecting arms 43 may be parallel to each other, and in this case, due to the existence of the connecting arms 43, the rigidity of the matching portion 42 is reduced, and the deformation is more likely to occur when the radial force is applied, so that the assembly between the valve body assembly 10 and the coil 20 is also simpler, which is not limited herein.

In one embodiment, the connecting arm 43 has a flat plate shape, an arc shape, a folded line shape, a corrugated shape, or a multi-segment folded shape in axial section.

Alternatively, the cross section of the connecting arm 43 along the axial direction thereof may be a flat plate, that is, the cross section of the connecting arm 43 along the length direction thereof is a flat plate, and at this time, the connecting arm 43 may be a connecting piece, or a connecting rod, etc., and when the cross section of the connecting arm 43 along the axial direction thereof is an arc, the connecting arm 43 may be irregular in shape as a whole, which is not limited herein. Of course, the connecting arm 43 may have a multi-stage bent shape integrally connected, and in this case, the axial cross section of the connecting arm 43 may be a polygonal line shape, a corrugated shape, or a multi-stage bent shape, and the specific configuration is not limited herein.

In an embodiment, the inner edge 41a of the annular body 41 is provided with a plurality of connecting portions 41b protruding toward the center of the circle, and each connecting portion 41b is connected to each connecting arm 43.

Alternatively, the connecting portion 41b may be tapered from the inner edge 41a of the annular body 41 toward the center of the circle, and the cross section of the connecting portion 41b may be in a boss shape, so that when the overall circumferential width of the annular body 41 is unchanged, the connecting arm 43 and the matching portion 42 connected to the connecting arm 43 can be pushed toward the center of the circle, so that the elastic effect of the connecting arm 43 is better, and after the valve body assembly 10 and the coil 20 are installed, the matching portion 42 and the valve body assembly 10 are clamped more firmly.

In one embodiment, the circumferential width of the connecting arm 43 is less than or equal to the circumferential width of the connecting portion 41 b; the connecting arm 43 has a circumferential width smaller than or equal to the circumferential width of the fitting portion 42.

Alternatively, the circumferential width of the connecting arm 43 connected to the annular body 41 and the fitting portion 42 is large at both ends, and the width of the middle portion is small, so that the connecting area between the connecting arm 43 and the connecting portion 41b is large, the connecting strength thereof is high, and the connecting arm 43 is not easily broken even if it is bent many times. It can be understood that, when the matching portion 42 is held with the valve housing, during the compression process of the connecting arm 43, the connecting arm 43 is stressed at the joint between the connecting arm 43 and the annular body 41 to deform the connecting arm 43, and during the long-term use, the connecting arm 43 is easily broken at the joint between the connecting arm 43 and the annular body 41, and if the connecting arm 43 has a large overall width, the elastic effect is poor, so that the coil 20 and the valve body assembly 10 are not easy to be installed, and the circumferential width of the connecting arm 43 can be smaller than or equal to the circumferential width of the connecting portion 41b and smaller than or equal to the circumferential width of the matching portion 42. Therefore, in the present embodiment, in order to improve the service life of the connecting arm 43 without affecting the elastic effect of the connecting arm 43, the width of the connecting arm 43 is wider at the two ends connected with the connecting portion 41b and the matching portion 42, and the middle is narrow, so that the elastic effect of the connecting arm 43 itself is better while the connecting strength of the connecting arm 43 with the connecting portion 41b and the matching portion 42 is ensured.

It should be noted that, in other embodiments, the width of the connecting arm 43 may be consistent from the end connected with the connecting portion 41b to the matching portion 42, or may be gradually narrowed and widened, or the width of the connecting arm 43 may be gradually narrowed from the end connected with the connecting portion 41b to the matching portion 42, which is not limited herein.

It will be appreciated that the connecting arm 43 serves as a resilient connecting member for connecting the engaging portion 42 and the annular body 41, and when the connecting arm 43 has a width greater than that of the engaging portion 42, the connecting arm 43 has a greater rigidity and is less likely to deform. Use first arch 111 on the valve casing, have first positioning groove 421 on the cooperation portion 42 for the example, when locating valve body subassembly 10 with coil 20 whole with arbitrary angle cover, if first positioning groove 421 on the cooperation portion 42 misplaces with first arch 111 with it on the valve casing with its location fit, can rotate coil 20 this moment, drive assembly part 40 and rotate to make first arch 111 on the valve body subassembly 10 block in first positioning groove 421, accomplish the assembly of coil 20 and valve body subassembly 10. If the width of the connecting arm 43 is greater than the width of the matching portion 42, the connecting arm is not easily deformed, and the external force required to be used during the assembly of the coil 20 and the valve body assembly 10 needs to be large, so that the rigidity of the connecting arm 43 is reduced by reducing the width of the connecting arm 43 and making the width of the connecting arm 43 less than or equal to the width of the matching portion 42, and the difficulty in mounting the coil 20 and the valve body assembly 10 can also be reduced.

In one embodiment, one of the fitting portion 42 and the outer 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 421 into which the first projection 111 is inserted and positioned; or, at least one of the fitting parts 42 is provided with the first protrusion 111, and at least one of the fitting parts 42 is provided with the first positioning groove 421; the outer peripheral wall of the valve body assembly 10 is provided with a first positioning groove 421 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 421.

Alternatively, when the first projection 111 is provided on the outer peripheral wall of the valve housing, as shown in fig. 1, the side of the fitting portion 42 facing the valve housing has a first positioning groove 421 for inserting and positioning the first projection 111, the first positioning groove 421 may be a groove, or a through hole penetrating the entire fitting portion 42, when the coil 20 and the valve body assembly 10 are assembled in place, the first positioning groove 421 of each fitting portion 42 is inserted by the first projection 111 of the valve housing, so as to prevent the valve body assembly 10 and the coil 20 from being relatively rotated after the assembly is completed, at the same time, the installation strength of the coil 20 and the valve body assembly 10 can be further improved, so as to limit the axial separation of the coil 20 and the valve body assembly 10 along the valve body assembly 10, meanwhile, the acting force applied to the connecting arm 43 is reduced, the deformation degree of the connecting arm 43 is reduced, the coil 20 and the valve body assembly 10 are more stably installed, and meanwhile, the service life of the connecting arm 43 is longer.

Accordingly, when the first positioning groove 421 is formed on the outer peripheral wall of the valve housing, the first protrusion 111 which is positioned and matched with the first positioning groove 421 is protruded from one side of the matching portion 42 facing the valve housing, and the first positioning groove 421 may be a groove. It also enhances the mounting strength of the coil 20 and the valve body assembly 10 to limit axial separation of the coil 20 and the valve body assembly 10, making the mounting of the coil 20 and the valve body assembly 10 more robust.

Further, when there are a plurality of fitting parts 42 on the fitting part 40, taking 2 fitting parts 42 of the fitting part 40 as an example, one of the fitting parts 42 is provided with the first protrusion 111, and the other fitting part 42 is provided with the first positioning groove 421 (not shown), at this time, the valve housing is provided with the first positioning groove 421 corresponding to the first protrusion 111, the valve housing is provided with the first protrusion 111 protruding corresponding to the first positioning groove 421, when the coil 20 and the valve body assembly 10 are assembled in place, the first protrusion 111 of one of the fitting parts 42 is clamped into the first positioning groove 421 of the valve housing, the first positioning groove 421 of the other fitting part 42 is inserted by the first protrusion 111 of the valve housing, which can also improve 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, and simultaneously limit the circumferential relative rotation 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, meanwhile, 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 from a side surface of the fitting portion 42 facing the valve body assembly 10, before the valve body assembly 10 and the coil 20 are assembled in place, the first protrusion 111 may generate interference friction with the outer peripheral wall of the valve housing, and when the outer surface of the first protrusion 111 is arc-shaped, if the first protrusion 111 may be a convex bubble, it may also be a hemispherical protrusion or an ellipsoidal protrusion, which may greatly reduce the friction coefficient with the outer peripheral wall of the valve housing, so that the assembly of the coil 20 and the valve body assembly 10 is simpler. Correspondingly, when this first arch 111 is established on the periphery wall of valve casing, in the assembling process of coil 20 and valve body subassembly 10, this first arch 111 can take place conflict friction with the surface of cooperation portion 42, set the surface of first arch 111 on the valve casing to the arc this moment, the coefficient of friction of its cooperation portion 42 and valve casing periphery wall that significantly reduces, make the assembly of coil 20 and valve body subassembly 10 simpler, reduce the wearing and tearing of coil 20 and valve body subassembly 10 dismouting in-process, electronic expansion valve's life is improved.

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

In other embodiments (not shown), the outer peripheral wall of the valve body assembly 10 may be provided with a second positioning groove corresponding to each of the matching portions 42, and the second positioning groove is adapted to be caught by the matching portions 42.

Optionally, the size of each second positioning slot is matched with the size of the corresponding matching part 42, that is, when the valve body assembly 10 and the coil 20 are assembled together, each matching part 42 is clamped in the second positioning slot corresponding to the valve housing, so as to limit the relative rotation between the coil 20 and the valve body assembly 10, and at the same time, to make the connection between the valve body assembly 10 and the coil 20 more stable. Coil 20 is in the assembling process, be the periphery wall butt of this cooperation portion 42 and valve casing earlier, so that linking arm 43 takes place elastic deformation, treat that second constant head tank on cooperation portion 42 and the valve casing wall corresponds, the valve casing reduces the effort of linking arm 43, linking arm 43 resumes certain deformation, drive cooperation portion 42 card and go into in the second constant head tank, accomplish valve body subassembly 10 and coil 20's assembly, the effort that linking arm 43 received has been reduced, the deformability of linking arm 43 has been reduced, when making the installation of coil 20 and valve body subassembly 10 more firm, the life of linking arm 43 is longer.

In one embodiment, the mating portion 42 is plate-shaped or spherical or hemispherical.

Alternatively, the matching portion 42 may be a plate, such as a square spring, a square plate, or other irregular plate, which is not limited herein. Of course, in other embodiments, the matching portion 42 may also be spherical or hemispherical, or other irregular shapes, and the valve housing may be provided with a second groove corresponding to the matching portion 42, so that the matching portion 42 is snapped into the second groove, where the specific shape of the matching portion 42 is not limited, as long as it can hold and fix the coil 20 and the valve body assembly 10.

In one embodiment, the fitting portion 42 has a first end and a second end disposed along an axial direction of the fitting 40, and the connecting arm 43 is connected to the first end, or the connecting arm 43 is connected to the second end; or connecting arm 43 is connected between the first and second ends.

Alternatively, the connecting arm 43 may be connected to the upper end of the fitting portion 42, or may be connected to the lower end of the fitting portion 42 or to the side of the fitting portion 42 facing away from the valve body assembly 10, which is not limited herein. In the present embodiment, as shown in fig. 1 and 2, the first end and the second end of the matching portion 42 can be respectively defined as the upper end and the lower end of the matching portion 42, and the connecting arm 43 is connected with the upper end of the matching portion 42, and at this time, the included angle between the connecting arm 43 and the matching portion 42 is an obtuse angle.

In another embodiment, as shown in fig. 6, taking 2 fitting portions 42 of the assembly member 40 as an example, in this embodiment, the connecting arm 43 is disposed to be inclined downward from the connection with the annular body 41, so that the included angle between the connecting arm 43 and the annular body 41 is an obtuse angle, the connecting arm 43 is connected to the lower end of the fitting portion 42, and the connecting arm 43 and the fitting portion 42 can be connected by an arc transition to improve the connection strength. At this time, the included angle between the connecting arm 43 and the engaging portion 42 is an acute angle, that is, the engaging portion 42 is inclined upward from the engaging portion with the connecting arm 43, so that the space occupied by the whole assembly member 40 in the axial direction is smaller, and the whole structure of the electronic expansion valve is more compact while the installation of the coil 20 and the valve body assembly 10 is more stable.

It should be noted that, in other embodiments, it is also possible that the connecting arm 43 is connected to the position between the first end and the second end of the matching portion 42, which is not limited herein.

In an embodiment, the annular body 41 is provided with a reinforcing portion 41c protruding toward the center of the circle at an inner edge 41a between two adjacent matching portions 42, and the reinforcing portion 41c and the connecting portion 41b are arranged at intervals.

Alternatively, the annular body 41 may be an annular plate with a relief hole at a central location, and when the coil 20 and the valve body assembly 10 are installed, the valve body assembly 10 first needs to pass through the relief hole of the annular plate and enter the inner space of the stator housing 21. This dodge the centre of a circle in hole can be the coaxial setting with the axis of stator shell 21, and in this embodiment, the one end of linking arm 43 is connected on the inner edge 41a of ring body 41, and is the contained angle setting with ring body 41, therefore the whole width of cyclic annular board can set up narrowly to reserve longer length along cyclic annular board circumference for linking arm 43, make the holistic elastic property of linking arm 43 better. In order to enhance the strength of the annular body 41, the inner edge 41a of the annular body 41 between the two matching portions 42 is protruded toward the center of the circle to form a reinforcing portion 41c, so as to increase the width of the annular body 41, increase the connection area between the annular body 41 and the stator housing 21, improve the structural strength of the annular body 41, and increase the connection strength between the stator housing 21 and the annular body 41. And the reinforcing portion 41c and the connecting portion 41b are spaced apart from each other without interfering with the deformation of the connecting arm 43.

In an embodiment, as shown in fig. 1, a first positioning portion 412 is disposed on a side of the annular body 41 facing the stator casing 21, and a second positioning portion that is in positioning fit with the first positioning portion 412 is correspondingly disposed on a side of the stator casing 21 facing the annular body 41; the first positioning portion 412 is a protrusion, and the second positioning portion is a groove; alternatively, the first positioning portion 412 is a groove, and the second positioning portion is a protrusion.

Optionally, a first positioning portion 412 is disposed on a side of the ring body 41 facing the stator housing 21, a second positioning portion is correspondingly disposed on a side of the stator housing 21 facing the ring body 41, and when the ring body 41 is mounted on the stator housing 21, the first positioning portion 412 is clamped into the second positioning portion to avoid circumferential deviation between the ring body 41 and the stator housing 21, so as to improve connection reliability. In this embodiment, from the viewpoint of facilitating the production of the stator housing 21 and the ring body 41, the first positioning portion 412 may be a cylindrical protrusion, and the second positioning portion may be a groove adapted to the cylindrical protrusion, and the cylindrical protrusion is inserted into the groove when the ring body 41 is mounted on the stator housing 21, so as to avoid the circumferential offset between the ring body 41 and the stator housing 21.

Of course, in other embodiments, the first positioning portion 412 may be a groove, and the second positioning portion may be a protrusion, which is not limited to the shape. The stator housing 21 may be connected to the annular body 41 by injection molding, or may be fixed by welding, which is not limited herein.

In an embodiment, the annular body 41 is axially provided with a plurality of second grooves or through holes arranged at intervals, the stator housing 21 is formed by injection molding to wrap the stator housing 21 and the annular body 41, and the plastic housing 24 is filled with the second grooves or through holes.

Optionally, the annular body 41 is axially provided with second grooves or through holes disposed at intervals, and for convenience of explanation, the second grooves or through holes are defined as the auxiliary fixing portions 411, which may be individually provided by 1, or 2, 3, or more, and are not limited herein. In this embodiment, the stator housing 21 and the annular body 41 are integrally formed by injection molding to form the plastic housing 24 that wraps the periphery of the stator housing 21 and the annular body 41, so as to increase the connection strength between the assembly member 40 and the stator housing 21, at this time, since the annular body 41 has the auxiliary fixing portion 411 thereon, in the injection molding process, the molten resin can flow into and fill the auxiliary fixing portion 411, so that the molded plastic housing 24 and the annular body 41 are more firmly connected.

The present invention further provides a refrigeration device, which includes an electronic expansion valve, and the specific structure of the electronic expansion valve refers to the above embodiments, and since the refrigeration device adopts all the technical solutions of all the above embodiments, the refrigeration device at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein.

The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An electronic expansion valve, comprising:

a valve body assembly;

the assembly part comprises an annular body and a plurality of matching parts connected with the annular body, and the matching parts are connected with the valve body assembly in a clamping manner;

2. The electronic expansion valve according to claim 1, wherein the coil is provided with a cover body, the cover body is mounted on an end of the stator housing away from the assembly member to cover the passage, and the plastic housing is connected with the cover body;

3. The electronic expansion valve of claim 2, wherein the cover is in the form of a cap, the cover is provided with a cap body and a visor, the cap body has a receiving cavity for receiving a portion of the valve body assembly passing through the passage, and the visor is bridged to the stator housing.

4. The electronic expansion valve of claim 3, wherein the cap body is provided with a bottom plate, the periphery of the bottom plate extends along the axial direction of the coil to form a side wall arranged on the valve body assembly, and one end of the side wall far away from the bottom plate protrudes outwards along the radial direction of the coil to form the brim.

5. The electronic expansion valve of claim 3, wherein the cap body and the visor are integrally formed, and the cap body and the visor are both made of metal;

or, the brim is made of metal, the cap body is made of nonmetal, and the plastic shell and the cap body are integrally formed.

6. The electronic expansion valve of claim 3, wherein the cap body and the visor are made of non-metallic materials, and the visor is welded and fixed to the plastic housing.

7. The electronic expansion valve of claim 5, wherein the fitting is a metallic piece.

8. The electronic expansion valve of claim 1, wherein the peripheral wall of the stator housing is provided with a gate.

9. The electronic expansion valve of claim 1, wherein the fitting is provided with a connecting arm connecting the annular body and each of the engagement portions.

10. The electronic expansion valve of claim 9, wherein the fitting portion has a first end and a second end disposed in an axial direction of the fitting, the connecting arm being connected to the first end;

alternatively, the connecting arm is connected to the second end;

11. The electronic expansion valve according to claim 1, wherein one of the fitting portion and the outer peripheral wall of the valve body assembly is provided with a first projection, and the other is provided with a first positioning groove into which the first projection is inserted and positioned;

12. The electronic expansion valve of claim 11, wherein the outer surface of the first protrusion is arc-shaped.

13. The electronic expansion valve according to claim 1, wherein a first positioning portion is disposed on a side of the annular body facing the stator housing, and a second positioning portion corresponding to the first positioning portion is disposed on a side of the stator housing facing the annular body;

14. The electronic expansion valve according to 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 housing are molded to form a plastic shell wrapping the stator housing and the annular body, and the plastic shell is filled in the second grooves or the through holes.

15. A refrigeration device comprising an electronic expansion valve according to any of claims 1-14.