CN215983357U

CN215983357U - Electronic expansion valve

Info

Publication number: CN215983357U
Application number: CN202122088583.6U
Authority: CN
Inventors: 陈勇好; 黄鸿峰; 刘曈晖
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-08
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to the technical field of air conditioner refrigeration, in particular to an electronic expansion valve. An electronic expansion valve comprises a valve seat and a nut assembly, wherein the nut assembly is arranged in the valve seat and is formed by injection molding through a mold; the nut component is provided with a rotation stopping part which can limit the rotation of the nut component in the die. Compared with the prior art, the utility model has the advantages that: can restrict the rotatory portion that splines of nut in the mould through setting up on nut component to avoid nut component to skid when the drawing of patterns of moulding plastics, cause the screw thread in the nut component to produce and warp, influence the processing effect.

Description

Electronic expansion valve

Technical Field

The utility model relates to the technical field of air conditioner refrigeration, in particular to an electronic expansion valve.

Background

With the popularization of the inverter air conditioner, the electronic expansion valve is used as a main component of the inverter air conditioner, and the performance of the electronic expansion valve greatly influences the comfort and the energy saving performance of the air conditioner.

The nut component in the existing electronic expansion valve is easy to slip when injection molding and demolding are carried out, so that the deformation of threads in the nut component is caused, and the processing effect is influenced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides an electronic expansion valve capable of preventing a nut assembly from slipping during injection and demolding.

In order to solve the technical problems, the utility model provides the following technical scheme:

an electronic expansion valve comprises a valve seat and a nut assembly, wherein the nut assembly is arranged in the valve seat and is formed by injection molding through a mold; the nut component is provided with a rotation stopping part, and the rotation stopping part can limit the rotation of the nut component in the die.

It can be understood that, this application through set up on the nut subassembly can restrict the nut is rotatory in the mould the portion of splining to avoid the nut subassembly skids when the drawing of patterns is moulded plastics, causes the screw thread in the nut subassembly produces the deformation, influences the processing effect.

In one embodiment, the nut assembly includes a nut seat mounted in the valve seat, the anti-rotation portion being disposed on the nut seat.

It can be understood that, by arranging the rotation stopping part on the nut seat, when the nut seat is subjected to injection molding and demolding, the nut seat and a mold cannot slide, so that the deformation of the thread in the nut seat due to the sliding is avoided.

In one embodiment, the rotation stopping part is arranged on the outer side wall of the nut seat; and/or the rotation stopping part is arranged on the end surface far away from the valve seat.

It can be understood that, by providing the rotation stop portion on the outer side wall or the end surface of the nut seat, the relative rotation between the outer side wall or the end surface of the nut seat and the mold is prevented from slipping.

In one embodiment, the number of the rotation stoppers is one or more.

In one embodiment, the number of the rotation stopping parts is at least two, and the at least two rotation stopping parts are symmetrically arranged on two sides of the nut seat relative to the axis of the nut seat.

In one embodiment, the rotation stopping part is arranged on the outer side wall of the nut seat, the outer side wall of the nut seat is an arc surface, and the rotation stopping part is a plane; or the rotation stopping part is an arc surface, and the rotation stopping part is not concentric with the outer side wall of the nut seat.

In one embodiment, the rotation stopping part is arranged on the end surface of the nut seat far away from the valve seat, the end surface of the nut seat is a plane, the rotation stopping part is a plane, and the rotation stopping part is arranged in a concave or convex way relative to the end surface of the nut seat; or, the rotation stopping part is an arc surface.

In one embodiment, the rotation stopping part is arranged on the outer side wall of the nut seat, and the rotation stopping part penetrates through two ends of the nut seat; or the rotation stopping part is arranged on the end surface of the nut seat far away from the valve seat, and the rotation stopping part penetrates through two sides of the nut seat.

In one embodiment, the nut assembly comprises a nut seat and a connecting sleeve, the nut seat is arranged in the connecting sleeve in a penetrating mode, the nut seat and the connecting sleeve are integrally installed in the valve seat, and the rotation stopping portion is arranged on the connecting sleeve.

It can be understood that, by arranging the rotation stopping part on the connecting sleeve, when the nut component is subjected to injection molding and demolding, no slip occurs between the nut component and a mold, so that the threads in the nut component are prevented from being deformed due to the slip.

In one embodiment, the connecting sleeve is provided with a notch, the nut seat is provided with a through hole along the radial direction, the notch and the through hole are correspondingly arranged, and the rotation-stopping part comprises a limiting rod which is arranged in the through hole in a penetrating way and penetrates out of the notch.

It can be understood that, through with the gag lever post wears to locate the through-hole and follow the breach department wears out to make nut component when the drawing of patterns of moulding plastics, the gag lever post can support the mould inner wall, can not take place to skid between nut component and the mould, thereby avoid the screw thread in the nut component warp because skid.

In one embodiment, the connecting sleeve includes a main body portion and an embedding portion connected to each other, and the embedding portion can be embedded in the nut seat as the nut seat is inserted into the connecting sleeve.

It can be understood that, by making the connection sleeve include the embedding portion, not only the embedding portion can be embedded in the nut seat, which enhances the connection strength between the connection sleeve and the nut seat, but also the contact area when the connection sleeve is installed with the valve seat is increased, thereby enhancing the bonding strength between the nut seat, the connection sleeve and the valve seat.

Compared with the prior art, this application through set up on the nut subassembly and can restrict the nut is rotatory in the mould the portion of splining to avoid the nut subassembly skids when the drawing of patterns of moulding plastics, causes screw thread in the nut subassembly produces and warp, influences the processing effect.

Drawings

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

FIG. 2 is a schematic structural view of the injection molding process of the nut assembly provided by the present invention in a mold;

FIG. 3 is a schematic structural view of the nut assembly demolded in accordance with the present invention;

FIG. 4 is a schematic structural view of one embodiment of a nut assembly provided in accordance with the present invention;

FIG. 5 is a schematic structural view of one embodiment of a nut assembly provided in accordance with the present invention;

FIG. 6 is a schematic structural view of one embodiment of a nut assembly provided in accordance with the present invention;

FIG. 7 is a schematic structural view of one embodiment of a nut assembly provided in accordance with the present invention;

fig. 8 is a schematic structural view of one embodiment of the nut assembly provided in the present invention.

Reference numerals:

100. an electronic expansion valve; 10. a valve seat; 20. a nut assembly; 21. a nut seat; 211. a through hole; 22. connecting sleeves; 221. a notch; 222. a main body portion; 23. a rotation stop section; 231. an included angle section; 30. a mold; 31. a first mold; 32. a second mold; 33. a mold core; 40. a valve needle; 50. a valve housing; 60. a rotor; 70. a screw.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 7, the present invention provides an electronic expansion valve 100, wherein the electronic expansion valve 100 is applied to an air conditioning system, and controls a voltage or a current applied to the electronic expansion valve 100 by using an electrical signal generated by a regulated parameter, so as to achieve a purpose of regulating a liquid supply amount.

The problem that a nut component in an existing electronic expansion valve is easy to slip during injection molding and demolding is solved. The utility model provides an electronic expansion valve 100, which comprises a valve seat 10 and a nut component 20, wherein the nut component 20 is arranged in the valve seat 10, and the nut component 20 is formed by injection molding through a mold 30; the nut assembly 20 is provided with a rotation stopper 23, and the rotation stopper 23 can restrict the rotation of the nut assembly 20 in the mold 30.

This application can restrict the rotatory portion 23 that splines of nut in mould 30 through setting up on nut component 20 to avoid nut component 20 to skid when the drawing of patterns of moulding plastics, cause the screw thread in nut component 20 to produce and warp, influence the processing effect.

As shown in fig. 1, the electronic expansion valve 100 further includes a valve housing 50, a rotor 60, a screw 70, a coil (not shown), and a valve needle 40 disposed through the nut assembly 20. The nut assembly 20 includes a nut seat 21 and a connection sleeve 22. The nut seat 21 is arranged in the connecting sleeve 22 in a penetrating way, and the nut seat 21 and the connecting sleeve 22 are integrally arranged in the valve seat 10. The rotor 60 is connected to the nut seat 21, the valve sleeve 50 is covered outside the nut seat 21 and welded to the valve seat 10, the screw 70 is disposed in the nut seat 21 and in threaded connection with the nut seat 21, the screw 70 is rotatably connected to the valve needle 40, the coil is disposed outside the valve sleeve 50, the rotor 60 can be driven to rotate by energizing the coil, the rotor 60 drives the screw 70 to rotate, the nut seat 21 is limited by the valve seat 10, the nut seat 21 does not rotate, the screw 70 is driven to move in the axial direction, the valve needle 40 is driven to move in the axial direction of the nut seat 21, and the flow rate of the electronic expansion valve 100 is adjusted.

The nut seat 21 is made of engineering plastics, so that the weight of the nut seat 21 can be reduced, injection molding can be used for processing and forming, and the quality of threads in the nut seat 21 can be guaranteed in the injection molding process. Preferably, the nut seat 21 is made of PPS (polyphenylene sulfide), which has self-lubricating property and can reduce the abrasion between the needle 40 and the nut seat 21 and avoid the seizing. Of course, in other embodiments, the nut seat 21 may be machined by using a material such as powder metallurgy, and the like, which is not limited herein.

It should be noted that, the nut seat 21 machined by using a metal material has a large turning amount, and the machining quality of the internal thread is unstable; in order to overcome the defect, in the embodiment, the nut seat 21 is made of engineering plastics, but the engineering plastics are soft relative to metal materials, so that in order to protect the nut seat 21 from being damaged in the process of pressing the nut seat 21 on the valve seat 10, a connecting sleeve 22 is arranged between the nut seat 21 and the valve seat 10, and the arrangement of the connecting sleeve 22 is just for protecting the integrity of the nut seat 21, so that the processing quality of the internal thread is stable enough, and the quality of products is ensured.

In the electronic expansion valve 100, the connection sleeve 22 in this embodiment is injection-molded on the outer wall of the nut base 21 for easy installation. Firstly, a simple metal connecting sleeve 22 is processed, then a PPS nut seat 21 and the metal connecting sleeve 22 are molded into a whole in a mold 30, the molded nut assembly 20 is pressed into the valve seat 10 in an integral interference mode for fixing, and stress is applied to the metal connecting sleeve 22 during press mounting.

As shown in fig. 2, the mold 30 includes a first mold 31, a second mold 32, and a core 33. The first mold 31 and the second mold 32 are combined and butted against each other, and the core 33 is inserted into the second mold 32 from one end of the second mold 32 and inserted into the first mold 31. The first mold 31 and the second mold 32 can be separated from each other along the axial direction of the mold 30, and the core 33 can rotate relative to the second mold 32.

As shown in fig. 3, when the nut component 20 after injection molding needs to be demolded, first, the first mold 31 is separated from the second mold 32 along the axial direction of the mold 30, and at the same time, the mold core 33 is rotated relative to the nut component 20 and the second mold 32, so that the mold core 33 is rotated relative to the nut component 20 and the second mold 32, and because the nut component 20 has internal threads inside, the nut component 20 can be separated from the mold core 33 and the second mold 32 along the axial direction of the mold 30 during the rotation of the mold core 33 relative to the nut component 20, thereby completing the whole demolding process of the nut component 20; meanwhile, since the rotation stopping portion 23 is disposed on the second mold 32, the mold core 33 can be rotated when the first mold 31 is opened to a certain extent, thereby improving the production efficiency.

In the process of demoulding the nut component 20 with the existing structure, because the outer surface of the nut seat 21 made of the PPS is in a circular ring shape, the nut component 20 can also rotate relative to the second mold 32 in the process of rotating the mold core 33 relative to the nut component 20, and because the threads arranged on the inner surface of the nut component 20 are positioned between the nut component 20 and the mold core 33, the threads on the inner surface of the nut component 20 are easily deformed due to the rotation between the second mold 32 and the nut component 20, so that the processing effect is affected.

In order to overcome the above-mentioned defects, the present application limits the rotation between the second mold 32 and the nut component 20 by providing the rotation stopper 23 on the nut component 20. It should be noted that the rotation stopping portion 23 can be disposed only on the outer side wall or the end surface of the nut component 20, or on both the outer side wall and the end surface of the nut component 20; that is, the rotation stopper 23 is located between the second mold 32 and the nut assembly 20, so that the mold core 33 can be rotated when the first mold 31 is opened to a certain extent, which improves the production efficiency.

Referring to fig. 4 to 6, in one embodiment, the rotation stop portion 23 is disposed on the nut seat 21. The rotation stopper 23 is provided on an outer wall of the nut holder 21. That is, the rotation stopper 23 is provided between the nut holder 21 and the second mold 32. When the nut component 20 needs to be demolded, the first mold 31 is firstly separated from the second mold 32, then the mold core 33 is rotated, relative rotation occurs between the mold core 33 and the nut seat 21, the rotation stop part 23 limits the relative rotation between the second mold 32 and the nut seat 21, and therefore only movement along the axial direction of the mold 30 exists between the second mold 32 and the nut seat 21, and therefore deformation of threads in the nut seat 21 is avoided.

Preferably, the rotation stoppers 23 are provided in an even number and are provided on both sides of the nut holder 21 symmetrically with respect to the axis of the nut holder 21. This can further enhance the rotation stop effect of the rotation stop portion 23. Of course, in other embodiments, the number of the rotation stoppers 23 may be singular, and may also be arranged asymmetrically, which is not limited herein.

As shown in fig. 4, in one embodiment, the rotation stop portion 23 is disposed on the outer side wall of the nut seat 21 in the circular arc shape, the rotation stop portion 23 is a plane, an included angle section 231 is formed between the rotation stop portion 23 and the outer side wall of the nut seat 21, and when the nut seat 21 rotates relative to the second mold 32, the included angle section 231 abuts against the second mold 32, so that the rotation of the nut seat 21 relative to the second mold 32 is limited. The flat surface of the present embodiment may be a concave groove recessed toward the axial center of the nut seat 21, or a flat surface may be directly cut on the outer side wall of the nut seat 21, as shown in fig. 7.

As shown in fig. 5, in one embodiment, the rotation stop portion 23 is disposed on the outer side wall of the nut seat 21 in the shape of an arc, the rotation stop portion 23 is in the shape of an arc, and the rotation stop portion 23 in the shape of an arc is not concentric with the outer side wall of the nut seat 21. The reason why the rotation-stopping portion 23 having the arc surface is not concentric with the outer side wall of the nut seat 21 is to prevent the rotation-stopping portion 23 from being overlapped with the outer side wall of the nut seat 21, thereby disabling the rotation-stopping effect.

As shown in fig. 6, in one embodiment, the rotation stopping portion 23 is disposed on the outer side wall of the nut seat 21 in the circular arc shape, and the rotation stopping portion 23 is disposed through both ends of the nut seat 21. It should be noted that the rotation-stopping portions 23 may be disposed in various forms, and are not limited to be disposed in a plane, a curved surface, and penetrating through both ends of the nut seat 21 or not penetrating through both ends of the nut seat 21, and in other embodiments, the rotation-stopping portions 23 may be disposed in a combination of the above forms, or may be disposed in other forms, as long as the rotation of the nut seat 21 with respect to the second mold 32 can be limited, and the present invention is not limited thereto.

In one embodiment, the rotation stopping portion 23 is disposed on an end surface of the nut seat 21 away from the valve seat 10, the end surface of the nut seat 21 is a plane, the rotation stopping portion 23 is a plane, and the rotation stopping portion 23 is recessed or protruded relative to the end surface of the nut seat 21. An included angle section 231 is formed between the rotation stopping part 23 which is plane and is arranged concavely or convexly on the end surface of the nut seat 21 and the end surface of the nut seat 21, when the nut seat 21 rotates relative to the second die 32, the included angle section 231 is abutted against the second die 32, and therefore the rotation of the nut seat 21 relative to the second die 32 is limited. Of course, in other embodiments, if the end surface of the nut holder 21 is an arc surface, the rotation stop portion may be provided as a flat surface, and the rotation stop portion 23 and the end surface of the nut holder 21 may form an included angle section 231 capable of stopping rotation, which is not limited herein.

In one embodiment, the rotation stopping portion 23 is disposed on an end surface of the nut seat 21 away from the valve seat 10, the end surface of the nut seat 21 is a plane, and the rotation stopping portion 23 is an arc surface.

In one embodiment, the rotation stopper 23 is disposed on the end surface of the nut seat 21, and the rotation stopper 23 penetrates both sides of the end surface of the nut seat 21. As shown in fig. 7 and 8, the rotation stopper 23 is provided on the connection sleeve 22. When the rotation stopping part 23 is arranged on the connecting sleeve 22, it is required to ensure that the connecting sleeve 22 is positioned in the second mold 32; if the connecting sleeve 22 is located in the first mold 31, the mold core 33 must be rotated first, and at the same time, the mold core 33 is pulled away from the first mold 31, and then the first mold 31 is opened, so as to achieve the effect of preventing the nut component 20 from slipping relative to the mold 30, but this scheme is inefficient, so when the rotation stopping portion 23 is disposed on the connecting sleeve 22, it is necessary to ensure that the connecting sleeve 22 is located in the second mold 32, so as to improve the demolding efficiency. By arranging the rotation stop part 23 on the connecting sleeve 22, when the nut component 20 is subjected to injection molding and demolding, no slip occurs between the nut component 20 and the mold 30, so that the deformation of the thread in the nut component 20 due to the slip is avoided.

Of course, the rotation stop portion 23 disposed on the connecting sleeve 22 may also be a plane, a groove or an arc surface, which is not described herein again.

In one embodiment, the connecting sleeve 22 is provided with a notch 221. The nut seat 21 is provided with a through hole 211 along the radial direction, the notch 221 and the through hole 211 are correspondingly arranged, and the rotation stopping portion 23 comprises a limiting rod (not shown), which is arranged through the through hole 211 and penetrates out of the notch 221. At least one end of the limiting rod abuts against the second mold 32 to limit the rotation of the nut component 20 relative to the second mold 32.

Further, the connecting sleeve 22 includes a main body portion 222 and an embedded portion (not shown) connected to each other. The embedded part can be embedded into the nut seat 21 as the nut seat 21 is inserted into the connecting sleeve 22. By making the connecting sleeve 22 include the embedding portion, not only the embedding portion can be embedded into the nut seat 21, the connection strength between the connecting sleeve 22 and the nut seat 21 is enhanced, but also the contact area when the connecting sleeve 22 and the valve seat 10 are installed is increased, and further the bonding strength among the nut seat 21, the connecting sleeve 22 and the valve seat 10 is enhanced.

Specifically, the body portion 222 has a threaded section on an inner wall thereof. The threaded segments are circumferentially disposed along the inner wall of the body portion 222. Also, the threaded section is disposed coaxially with the body portion 222. When the connecting sleeve 22 is injection-molded on the nut seat 21, the threaded section can increase the matching area, so that the connecting sleeve 22 is more stably connected on the nut seat 21, and the injection-molded bonding strength between the nut seat 21 and the connecting sleeve 22 is increased.

In the process of demoulding the nut component 20 in the electronic expansion valve 100 provided by the utility model, firstly, the first mould 31 is separated from the second mould 32 along the axial direction of the mould 30, then the mould core 33 in the nut component 20 is rotated, so that the nut component 20 rotates relative to the mould core 33 and is separated towards the direction close to the first mould 31, and the rotation stopping part 23 is arranged on the nut component 20, and the rotation stopping part 23 limits the nut component 20 to rotate relative to the second mould 32, thereby protecting the thread in the nut component 20 from deformation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic expansion valve comprises a valve seat (10) and a nut component (20), wherein the nut component (20) is installed in the valve seat (10), and the nut component (20) is formed by injection molding through a mold (30);

the nut component (20) is provided with a rotation stopping part (23), and the rotation stopping part (23) can limit the rotation of the nut component (20) in the die (30).

2. An electronic expansion valve according to claim 1, wherein the nut assembly (20) comprises a nut seat (21) mounted in the valve seat (10), the rotation stop portion (23) being provided on the nut seat (21).

3. An electronic expansion valve according to claim 2, wherein the rotation stop portion (23) is provided on an outer side wall of the nut seat (21);

and/or the rotation stopping part (23) is arranged on the end surface far away from the valve seat (10).

4. An electronic expansion valve according to claim 3, wherein the number of rotation stoppers (23) is one or more.

5. An electronic expansion valve according to claim 4, wherein the rotation-stopping portions (23) are at least two, and at least two of the rotation-stopping portions (23) are provided on both sides of the nut seat (21) symmetrically with respect to the axis of the nut seat (21).

6. The electronic expansion valve according to claim 3, wherein the rotation stop portion (23) is disposed on an outer side wall of the nut seat (21), and the outer side wall of the nut seat (21) is an arc surface, and the rotation stop portion (23) is a plane surface;

or the rotation stopping part (23) is an arc surface, and the rotation stopping part (23) is not concentric with the outer side wall of the nut seat (21).

7. An electronic expansion valve according to claim 3, wherein the rotation stop portion (23) is arranged at an end surface of the nut seat (21) remote from the valve seat (10), and the end surface of the nut seat (21) is a plane, the rotation stop portion (23) is a plane, and the rotation stop portion (23) is arranged concavely or convexly with respect to the end surface of the nut seat (21); or the rotation stopping part (23) is an arc surface.

8. The electronic expansion valve according to claim 3, wherein the rotation stop portion (23) is provided on an outer side wall of the nut seat (21), and the rotation stop portion (23) is provided through both ends of the nut seat (21);

or the rotation stopping part (23) is arranged on the end surface of the nut seat (21) far away from the valve seat (10), and the rotation stopping part (23) penetrates through two sides of the nut seat (21).

9. The electronic expansion valve according to claim 1, wherein the nut assembly (20) comprises a nut seat (21) and a connecting sleeve (22), the nut seat (21) is inserted into the connecting sleeve (22), the nut seat (21) and the connecting sleeve (22) are integrally installed in the valve seat (10), and the rotation stopping portion (23) is disposed on the connecting sleeve (22).

10. The electronic expansion valve according to claim 9, wherein the connection sleeve (22) is provided with a notch (221), the nut seat (21) is provided with a through hole (211) along a radial direction, the notch (221) and the through hole (211) are correspondingly arranged, and the rotation-stopping portion (23) comprises a limiting rod, and the limiting rod penetrates through the through hole (211) and penetrates out of the notch (221).

11. An electronic expansion valve according to claim 9, wherein the connection sleeve (22) comprises a main body portion (222) and an embedding portion connected to each other, the embedding portion being capable of embedding into the nut seat (21) as the nut seat (21) is inserted into the connection sleeve (22).