CN216742864U

CN216742864U - Electronic expansion valve

Info

Publication number: CN216742864U
Application number: CN202122433317.2U
Authority: CN
Inventors: 詹少军; 赵俊; 黄鸿峰
Original assignee: Anhui Huahai Metal Co ltd
Current assignee: Anhui Huahai Metal Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-06-14
Anticipated expiration: 2031-09-30

Abstract

The utility model provides an electronic expansion valve, which comprises: a valve body having a valve port; the valve head is movably arranged in the valve body and can block or open the valve port, the valve head is provided with a first communication hole, a second communication hole and a third communication hole which are sequentially communicated along the axial direction, and the diameter of the second communication hole is smaller than that of the first communication hole and that of the third communication hole; the screw rod is arranged in the valve head in a penetrating mode and provided with a first section and a second section which are sequentially arranged along the axial direction, a tangent plane structure is arranged on the side wall of the screw rod, and a balance channel is arranged between the tangent plane structure and the valve head; the valve sleeve is positioned in the third communicating hole, the valve sleeve is provided with a connecting hole, the second section is connected with the connecting hole, and a first gap is formed between the section structure and the connecting hole; the diameter of the connecting hole is D1, the maximum value of the first clearance is L1, and 0.5 × D1 is more than L1 is more than 0.1 × D1. Through the technical scheme provided by the application, the problem that the machining difficulty of a balance channel in the prior art is high can be solved.

Description

Electronic expansion valve

Technical Field

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

Background

At present, current electronic expansion valve includes the valve body, the valve head, screw rod and valve barrel, be provided with the valve head on the valve body, the movably setting of valve head is in the valve body, the screw rod is worn to establish in the valve head and is connected with the valve barrel, in prior art, can be provided with the tangent plane on the lateral wall of screw rod usually, connecting hole in tangent plane and the valve barrel can form balanced passageway, but in current scheme, because structural parameter's influence, can lead to balanced passageway's the processing degree of difficulty high, the balanced speed of balanced passageway also can be reduced simultaneously, the work efficiency of device has been influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve, which aims to solve the problems of high processing difficulty and low balancing speed of a balancing channel in the prior art.

The utility model provides an electronic expansion valve, which comprises: a valve body having a valve port; the valve head is movably arranged in the valve body and can block or open the valve port, the valve head is provided with a first communication hole, a second communication hole and a third communication hole which are sequentially communicated along the axial direction, and the diameter of the second communication hole is smaller than that of the first communication hole and that of the third communication hole; the screw rod is arranged in the valve head in a penetrating mode and provided with a first section and a second section which are sequentially arranged along the axial direction, a tangent plane structure is arranged on the side wall of the screw rod, the tangent plane structure extends from the middle of the first section to the tail end of the second section, and a balance channel is arranged between the tangent plane structure and the valve head; the valve sleeve is positioned in the third communicating hole, the valve sleeve is provided with a connecting hole, the second section is connected with the connecting hole, and a first gap is formed between the tangent plane structure and the connecting hole; the diameter of the connecting hole is D1, the maximum value of the first clearance is L1, and 0.5 × D1 is more than L1 is more than 0.1 × D1.

Through the structure, the valve head is movably arranged in the valve body, the screw rod is arranged in the valve head in a penetrating mode, so that the valve head can conveniently plug or open a valve port in the valve body, meanwhile, the screw rod is connected with a connecting hole in the valve sleeve in a penetrating mode, the side wall of the screw rod is provided with the tangent plane structure, and a balance channel is formed between the tangent plane structure and the valve head, so that the processing difficulty of the balance channel can be reduced, and the size of the balance channel is simplified; and a first gap is formed between the tangent structure and the connecting hole, the diameter of the connecting hole is set to be D1, the maximum value of the first gap is set to be L1, 0.5 × D1 is greater than L1 is greater than 0.1 × D1, the balance speed of the balance channel can be ensured by utilizing the range, and the working efficiency of the device is improved.

Furthermore, the cross-sectional area of the first gap is S, and S is more than or equal to 0.8mm². Through the arrangement, effective balance area can be provided, and the balance speed of the balance channel is further ensured.

Furthermore, the axial length of the section structure is L2, a second gap is arranged between the section structure and the second communication hole, the sum of the axial lengths of the first gap and the second gap is L3, and L2 is more than or equal to 1.3 × L3. So set up, increased the length of balanced passageway along the axis direction, can make the medium pass through behind the first clearance, reach the upper end of valve head more fast to balanced speed of balanced passageway has further been improved.

Further, the second gap is larger than the first gap. So set up and to provide bigger circulation space for the medium, be favorable to the medium through first clearance after, more fast through the second clearance to the circulation efficiency of device has been improved.

Furthermore, the distance between one end of the tangent plane structure, which is far away from the valve sleeve, and the upper end face of the valve head is L4, and L4 is less than or equal to 3 mm. Through the arrangement, the medium can be further ensured to continuously flow along the gap between the first section and the first connecting hole after passing through the balance channel, so that the time for the medium to reach the upper end of the valve head is shortened, and the balance speed of the device is further improved.

Furthermore, the screw rod is also provided with a third section, the third section is connected with one end of the first section, which is far away from the valve port, the diameter of the third section is larger than that of the first section, the distance between one end of the tangent plane structure, which is far away from the valve sleeve, and one end of the third section, which is close to the valve port, is L5, and L5 is more than or equal to 2X D1. So set up, be favorable to the device operation to lead the screw rod, set up the diameter of third section into being greater than the diameter of first section simultaneously, can guarantee the stability of device operation.

Further, the diameter of the first section is larger than the diameter of the second section. So set up, be favorable to increasing the structural strength of screw rod hypomere to the working property when having guaranteed the device operation.

Further, the electronic expansion valve further includes: the spring is sleeved on the screw rod, one end of the spring is abutted to the stepped surface between the first hole section and the second hole section, and the other end of the spring is abutted to the stepped surface between the first section and the third section. Through the structure, the valve head can block the valve port without the action of other external forces.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a cross-sectional view of an electronic expansion valve provided by the present invention;

FIG. 2 shows a cross-sectional view of the screw, valve sleeve and valve head provided by the present invention after assembly;

FIG. 3 is a schematic drawing showing the assembled dimensions of the screw, valve sleeve and valve head provided by the present invention;

fig. 4 shows a cross-sectional view at B-B in fig. 3.

Wherein the figures include the following reference numerals:

10. a valve body; 11. a valve port;

20. a valve head; 21. a first communication hole; 22. a second communication hole; 23. a third communication hole;

30. a screw; 31. a first stage; 32. a second stage; 33. a third stage; 34. cutting the structure of a section;

40. a valve housing; 41. connecting holes; 50. a spring.

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. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the utility model, its application, or uses. 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.

As shown in fig. 1 and 2, the present invention provides an electronic expansion valve, including: a valve body 10, a valve head 20, a screw 30 and a valve sleeve 40. Wherein, the valve body 10 has a valve port 11, the valve head 20 is movably disposed in the valve body 10, the valve head 20 can close or open the valve port 11, the valve head 20 has a first communicating hole 21, a second communicating hole 22 and a third communicating hole 23 which are sequentially communicated along the axial direction, the diameter of the second communicating hole 22 is smaller than the diameter of the first communicating hole 21 and the third communicating hole 23, the screw 30 is inserted in the valve head 20, the screw 30 has a first section 31 and a second section 32 which are sequentially disposed along the axial direction, a tangential surface structure 34 is disposed on the side wall of the screw 30, the tangential surface structure 34 extends from the middle of the first section 31 to the end of the second section 32, a balance channel is disposed between the tangential surface structure 34 and the valve head 20, the valve housing 40 is disposed in the third communicating hole 23, the valve housing 40 has a connecting hole 41, the second section 32 is connected with the connecting hole 41, a first gap is disposed between the tangential surface structure 34 and the connecting hole 41, wherein, the diameter of the connecting hole 41 is D1, the maximum value of the first gap is L1, 0.5 × D1 > L1 > 0.1 × D1.

When the L1 is greater than 0.5D1, the maximum value of the first gap is increased, so that the welding strength between the valve sleeve 40 and the screw 30 is reduced, the connection between the valve sleeve 40 and the screw 30 is failed, and the structural strength after the valve sleeve 40 and the screw 30 are welded is affected; when L1 < 0.1D1, the maximum value of the first gap is reduced, and the flow rate of the medium through the first gap is also reduced, thereby reducing the balance speed of the balance passage. Therefore, in the present application, the maximum value L1 of the first gap is set to 0.5 × D1 > L1 > 0.1 × D1, so that the balancing speed of the balancing channel is ensured, and the working efficiency of the device is improved. Specifically, L1 may be 0.2D1, 0.3D1, or 0.4D 1.

By arranging the structure, the valve head 20 is movably arranged in the valve body 10, the screw rod 30 is arranged in the valve head 20 in a penetrating manner, so that the valve head 20 can conveniently block or open the valve port 11 in the valve body 10, meanwhile, the screw rod 30 is connected with the connecting hole 41 in the valve sleeve 40 in a penetrating manner, the tangent plane structure 34 is arranged on the side wall of the screw rod 30, and a balance channel is formed between the tangent plane structure 34 and the valve head 20, so that the processing difficulty of the balance channel can be reduced, and the size of the balance channel is simplified; moreover, a first gap is formed between the tangent structure 34 and the connecting hole 41, the diameter of the connecting hole 41 is set to be D1, the maximum value of the first gap is set to be L1, and 0.5 × D1 > L1 > 0.1 × D1, so that the processing difficulty of the balance channel can be reduced, the size of the balance channel is simplified, the balance speed of the balance channel can be ensured by utilizing the range, and the working efficiency of the device is improved.

As shown in FIGS. 3 and 4, the cross-sectional area of the first gap is S, S is more than or equal to 0.8mm². Through the arrangement, effective balance area can be provided, and the balance speed of the balance channel is further ensured. In particular, S may be 0.8mm²、0.9mm²Or 1.0mm²。

Specifically, the axial length of the tangent structure 34 is L2, a second gap is provided between the tangent structure 34 and the second communication hole 22, the sum of the axial lengths of the first gap and the second gap is L3, and L2 is greater than or equal to 1.3 × L3. So set up, increased the length of balanced passageway along the axis direction, can make the medium through first clearance after, reach the upper end of valve head 20 more fast to the balanced speed of balanced passageway has further been improved. Wherein the value of L2 may be 1.3 × L3, 1.4 × L3, or 1.5 × L3.

Specifically, the distance between one end of the tangent plane structure 34 far away from the valve sleeve 40 and the upper end surface of the valve head 20 is L4, and L4 is less than or equal to 3 mm. Through the arrangement, the medium can be further ensured to continuously flow along the gap between the first section and the first connecting hole after passing through the balance channel, so that the time for the medium to reach the upper end of the valve head 20 is shortened, and the balance speed of the device is further improved. Wherein the value of L4 may be 3mm, 2mm or 1 mm.

Furthermore, the screw 30 further has a third section 33, the third section 33 is connected to an end of the first section 31 far away from the valve port 11, the diameter of the third section 33 is larger than that of the first section 31, the distance between an end of the tangent structure 34 far away from the valve sleeve 40 and an end of the third section 33 close to the valve port 11 is L5, and L5 is greater than or equal to 2 × D1. So set up, be favorable to the device operation to leading screw rod 30, set up the diameter of third section 33 to be greater than the diameter of first section simultaneously, can guarantee the stability of device operation. Wherein the value of L5 may be 2 × D1, 3 × D1, or 4 × D1.

Specifically, the diameter of the first section 31 is larger than the diameter of the second section 32. So set up, be favorable to increasing the structural strength of screw rod 30 hypomere to the working property when having guaranteed the device operation.

Further, the electronic expansion valve further comprises a spring 50, the spring 50 is sleeved on the screw 30, one end of the spring 50 is abutted to the stepped surface between the first hole section and the second hole section, and the other end of the spring 50 is abutted to the stepped surface between the first section 31 and the third section 33. By this structure, the valve head 20 can block the valve port 11 without being affected by other external forces.

Through the technical scheme provided by the application, the valve head 20 is movably arranged in the valve body 10, the screw rod 30 is arranged in the valve head 20 in a penetrating manner, so that the valve head 20 can conveniently block or open the valve port 11 in the valve body 10, meanwhile, the screw rod 30 is connected with the connecting hole 41 in the valve sleeve 40 in a penetrating manner, the tangent plane structure 34 is arranged on the side wall of the screw rod 30, and a balance channel is formed between the tangent plane structure 34 and the valve head 20, so that the processing difficulty of the balance channel can be reduced, and the size of the balance channel is simplified; moreover, a first gap is formed between the tangent structure 34 and the connecting hole 41, the diameter of the connecting hole 41 is set to be D1, the maximum value of the first gap is set to be L1, and 0.5 × D1 is greater than L1 is greater than 0.1 × D1, so that the processing difficulty of the balance channel can be reduced, the size of the balance channel is simplified, the balance speed of the balance channel can be ensured, and the working efficiency of the device is improved. Meanwhile, the screw rod 30 is sleeved with a spring 50, and by the structure, the valve head 20 can block the valve port 11 without being influenced by other external forces.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …", "above … …", "above … …", "above", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

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

Claims

1. An electronic expansion valve, comprising:

a valve body (10) having a valve port (11);

the valve head (20) is movably arranged in the valve body (10), the valve head (20) can close or open the valve port (11), the valve head (20) is provided with a first communication hole (21), a second communication hole (22) and a third communication hole (23) which are sequentially communicated along the axial direction, and the diameter of the second communication hole (22) is smaller than that of the first communication hole (21) and that of the third communication hole (23);

the screw rod (30) is arranged in the valve head (20) in a penetrating mode, the screw rod (30) is provided with a first section (31) and a second section (32) which are sequentially arranged along the axial direction, a tangent plane structure (34) is arranged on the side wall of the screw rod (30), the tangent plane structure (34) extends from the middle of the first section (31) to the tail end of the second section (32), and a balance channel is arranged between the tangent plane structure (34) and the valve head (20);

the valve sleeve (40) is positioned in the third communication hole (23), the valve sleeve (40) is provided with a connecting hole (41), the second section (32) is connected with the connecting hole (41), and a first gap is formed between the tangent plane structure (34) and the connecting hole (41);

wherein the diameter of the connecting hole (41) is D1, the maximum value of the first clearance is L1, and 0.5 × D1 > L1 > 0.1 × D1.

2. An electronic expansion valve according to claim 1, wherein the cross-sectional area of the first gap is S, S ≧ 0.8 mm.

3. An electronic expansion valve according to claim 1, wherein the axial length of the cut structure (34) is L2, and a second gap is provided between the cut structure (34) and the second communication hole (22), and the sum of the axial lengths of the first gap and the second gap is L3, and L2 is 1.3 × L3.

4. The electronic expansion valve of claim 3, wherein the second gap is larger than the first gap.

5. An electronic expansion valve according to claim 1, wherein the distance between the end of the tangential surface structure (34) away from the valve sleeve (40) and the upper end surface of the valve head (20) is L4, and L4 is less than or equal to 3 mm.

6. An electronic expansion valve according to any of claims 1 to 5, wherein the screw (30) further comprises a third section (33), the third section (33) is connected to the end of the first section (31) remote from the valve port (11), the diameter of the third section (33) is larger than the diameter of the first section (31), the distance between the end of the tangential surface structure (34) remote from the valve housing (40) and the end of the third section (33) close to the valve port (11) is L5, and L5 is greater than or equal to 2D 1.

7. An electronic expansion valve according to claim 1, wherein the diameter of the first section (31) is larger than the diameter of the second section (32).

8. The electronic expansion valve of claim 6, further comprising:

spring (50), the cover is established on screw rod (30), the one end of spring (50) with first intercommunicating pore (21) with ladder face butt between second intercommunicating pore (22), the other end of spring (50) with first section (31) with ladder face butt between third section (33).