CN215806329U

CN215806329U - Electronic expansion valve

Info

Publication number: CN215806329U
Application number: CN202122112606.2U
Authority: CN
Inventors: 贺宇辰; 徐冠军; 詹少军
Original assignee: Nanchang Zhonghao Machinery Co ltd
Current assignee: Nanchang Zhonghao Machinery Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-02-11
Anticipated expiration: 2031-09-02

Abstract

The utility model provides an electronic expansion valve, comprising: the valve seat is provided with a first hole section, a second hole section, a third hole section and a valve cavity which are sequentially communicated, the first hole section, the second hole section and the third hole section are arranged in a step shape, and the valve port is positioned at one end, far away from the first hole section, of the valve cavity; the uide bushing, wear to establish first hole section, the second hole section, third hole section and valve chamber, the uide bushing has the first section that connects gradually along the axial, second section and third section, the symmetry is provided with two tangent plane structures on the lateral wall of uide bushing, the tangent plane structure is located the lateral wall of second section and third section, and the tangent plane structure extends to the end of third section along the one end of second section and first section be connected in the axial, tangent plane structure and second hole section and third hole section have the second clearance, the ratio of the interval of two tangent plane structures and the diameter of third hole section is between 0.85 to 0.96. Through the technical scheme of this application, can solve prior art noise great problem when the operation.

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, an existing electronic expansion valve includes a housing, a valve seat, and a guide sleeve, the housing has a containing cavity, the housing covers the upper end of the valve seat, the valve seat is provided with a valve cavity, and the guide sleeve is penetrated in the valve cavity and divides the containing cavity and the valve cavity into two independent cavities. However, in the use process of the existing electronic expansion valve, fluid generates turbulence when passing through the valve cavity, so that noise is generated, and the comfort level experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve, which aims to solve the problem that the electronic expansion valve in the prior art is high in noise.

The utility model provides an electronic expansion valve, which comprises: the valve seat is provided with a first hole section, a second hole section, a third hole section and a valve cavity which are sequentially communicated, the first hole section, the second hole section and the third hole section are arranged in a step shape, and the valve port is positioned at one end, far away from the first hole section, of the valve cavity; the guide sleeve penetrates through the first hole section, the second hole section, the third hole section and the valve cavity, the guide sleeve is provided with a first section, a second section and a third section which are sequentially connected along the axial direction, a first gap is formed between the first section and the inner wall of the first hole section, two tangent plane structures are symmetrically arranged on the side wall of the guide sleeve, the tangent plane structures are located on the side walls of the second section and the third section, the tangent plane structures axially extend to the tail end of the third section along one end, connected with the first section, of the second section, the tangent plane structures and the second hole section and the third hole section are provided with second gaps, the first gap, the second gap and the valve cavity are communicated with each other, and the ratio of the distance of the two tangent plane structures to the diameter of the third hole section is 0.85-0.96.

Through the structure, set up two tangent plane structures on the uide bushing lateral wall, make the tangent plane structure enough have the clearance with second hole section and third hole section, and the ratio of the interval with two tangent plane structures and the diameter of third hole section is between 0.85 to 0.96, can make valve pocket and first hole section through this clearance, form balanced passageway between second hole section and the third hole section, and then can make the pressure in valve pocket and the hole section keep unanimous, and then can reduce the pressure fluctuation that the fluid flows through when the valve pocket because of the torrent produces, reduce this kind of pressure fluctuation through balanced passageway, thereby can reduce the noise that the refrigerant produced when flowing through electronic expansion valve, user comfort has been improved and has been experienced.

Furthermore, the third hole section has a length L, a diameter D, and a spacing between the two sectional structures S, where L is 0.5 (D-S) (1.2-3.5). So set up, utilize the resonant cavity principle, make the cooperation between tangent plane structure and the third hole section more reasonable, reduced the noise when the device moves, tangent plane structure can reduce the volume of uide bushing simultaneously, has reduced the device's manufacturing cost.

Furthermore, the second section and the second hole section are in transition fit or interference fit, and the second section is used for limiting the relative displacement of the guide sleeve and the valve seat. Through the arrangement, the guide sleeve can be fixedly connected with the valve seat, and the guide sleeve is prevented from displacing in the operation process, so that the stability of the device in operation is ensured.

Furthermore, the second section and the third section are arranged in a ladder way, the second section is arranged corresponding to the second hole section, and the third section penetrates through the third hole section and the valve cavity. The second section and the third section are arranged in a step shape and are respectively arranged corresponding to the second hole section, the third hole section and the valve cavity, so that the guide sleeve is favorably guided in the installation process, the guide sleeve is convenient to install, and the assembly efficiency is improved.

Further, the diameter of the valve cavity is smaller than the diameter of the third bore section. This reduces pressure fluctuations that occur when the fluid is caused to flow through the valve chamber, thereby reducing noise during operation of the device.

Further, the diameter of the third section and the diameter of the third bore section are in a relation of 0.85 to 1. So set up and to have the clearance between third section and the third hole section, simultaneously according to the resonant cavity principle, further improved the noise reduction effect of the device.

Further, the clearance between the first section and the first hole section is between 2mm and 4mm, and the clearance between the tangent structure and the second hole section is between 1mm and 2 mm. So can make above-mentioned clearance form balanced passageway jointly, not only can guarantee the pressure stability in the hole section, also reduce the pressure fluctuation of production when the fluid flows through the valve pocket simultaneously, further improve the noise reduction effect of device.

Further, the electronic expansion valve further includes: the shell is connected with the valve seat, and an accommodating cavity is formed between the shell and the valve seat; the nut sleeve is arranged in the accommodating cavity; the screw rod is movably arranged in the accommodating cavity, penetrates through the nut sleeve and is in threaded connection with the nut sleeve; the valve needle assembly is movably arranged in the guide sleeve, one end of the valve needle assembly is connected with the screw rod, and the screw rod drives the valve needle assembly to move so as to open or close the valve port. The valve needle assembly moves between the opening position and the closing position, so that the accommodating cavity is communicated with the valve cavity, the pressure in the accommodating cavity is consistent with that in the valve cavity, and the stability of the device in operation is ensured.

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 schematic cross-sectional view of an electronic expansion valve provided by the present invention;

FIG. 2 shows a schematic cross-sectional view of a valve seat provided by the present invention;

FIG. 3 is a schematic structural view of a guide sleeve provided by the present invention;

FIG. 4 is a schematic size view of the guide sleeve provided by the present invention after assembly with a valve seat;

fig. 5 shows a dimensional schematic view of a guide sleeve provided by the present invention.

Wherein the figures include the following reference numerals:

10. a valve seat; 11. a first bore section; 12. a second bore section; 13. a third bore section; 14. a valve cavity; 15. a valve port;

20. a guide sleeve; 21. a first stage; 22. a second stage; 23. a third stage; 24. cutting the structure of a section;

30. a housing; 31. an accommodating chamber; 40. a nut sleeve; 50. a screw; 60. a valve needle assembly.

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 to 3, the present invention provides an electronic expansion valve, including: a valve seat 10 and a guide sleeve 20. Wherein, the valve seat 10 has a first hole section 11, a second hole section 12, a third hole section 13 and a valve cavity 14 which are sequentially communicated, the first hole section 11, the second hole section 12 and the third hole section 13 are arranged in a step shape, the valve port 15 is positioned at one end of the valve cavity 14 far away from the first hole section 11, the guide sleeve 20 is arranged in the first hole section 11, the second hole section 12, the third hole section 13 and the valve cavity 14 in a penetrating way, the guide sleeve 20 has a first section 21, a second section 22 and a third section 23 which are sequentially connected along the axial direction, a first gap is formed between the first section 21 and the inner wall of the first hole section 11, two tangent plane structures 24 are symmetrically arranged on the side wall of the guide sleeve 20, the tangent plane structure 24 is positioned on the side wall of the second section 22 and the third section 23, and the tangent plane structure 24 extends to the tail end of the third section 23 along the end of the second section 22 connected with the first section 21 in the axial direction, the tangent plane structure 24 has a second gap with the second hole section 12 and the third hole section 13, the first gap, the second gap and the valve chamber 14 communicate with one another, and the ratio of the distance between the two sectional structures 24 to the diameter of the third bore section 13 is between 0.85 and 0.96.

When the ratio of the distance between the two tangent structures 24 and the diameter of the third hole section 13 is less than 0.85, the gap between the tangent structure 24 and the third hole section 13 is increased, and the flow rate of the fluid flowing through the balance channel is increased; when the ratio of the distance between the two tangent plane structures 24 and the diameter of the third hole section 13 is greater than 0.96, the gap between the tangent plane structures 24 and the third hole section 13 can be reduced, the flow of fluid flowing through the balance channel can be reduced, the pressure buffering effect of the balance channel can be weakened through the two arrangements, and therefore the noise reduction effect of the balance channel is reduced. Therefore, in the application, the ratio of the distance between the two tangent plane structures 24 to the diameter of the third hole section 13 is between 0.85 and 0.96, so that the pressure buffering effect of the balance channel can be ensured, and the noise reduction effect is improved. In particular, the ratio of the distance between the two tangential structures 24 to the diameter of the third bore section 13 may be 0.85, 0.9 or 0.96.

Through setting up above-mentioned structure, set up two tangent plane structures 24 on uide bushing 20 lateral wall, make tangent plane structure 24 enough have the clearance with second hole section 12 and third hole section 13, and be between 0.85 to 0.96 with the ratio of the interval of two tangent plane structures 24 and the diameter of third hole section 13, can make valve chamber 14 and first hole section 11 through this clearance, form balanced passageway between second hole section 12 and the third hole section 13, and then can make valve chamber 14 keep unanimous with the pressure in the hole section, and then also can reduce the pressure fluctuation that the fluid flows through when valve chamber 14 because of the torrent produces, reduce this kind of pressure fluctuation through balanced passageway, thereby can reduce the noise that the refrigerant produced when flowing through electronic expansion valve, user's comfort level experience has been improved.

Through the technical scheme that this application provided, set up two tangent plane structures 24 on uide bushing 20 lateral wall, with first hole section 11, second hole section 12, third hole section 13 and the 14 ladder settings of valve pocket, make tangent plane structure 24 and third hole section 13 between have the clearance, utilize the resonant cavity principle, not only make the pressure of valve pocket 14 and first hole section 11, second hole section 12, third hole section 13 keep unanimous, the pressure pulsation that produces when also can reduce fluid flow through valve pocket 14 simultaneously, thereby can reduce the refrigerant noise that flows through electronic expansion valve, improve user's comfort level.

As shown in fig. 4, the third hole segment 13 has a length L, the third hole segment 13 has a diameter D, the interval between the two sectional structures 24 is S, and L is 0.5 (D-S) × (1.2 to 3.5). So set up, utilize the resonant cavity principle, make the cooperation between tangent plane structure 24 and the third hole section 13 more reasonable, reduced the noise when the device moves, tangent plane structure 24 can reduce the volume of uide bushing 20 simultaneously, has reduced the manufacturing cost of device. Specifically, the numerical range in the above formula may be selected to be 1.2, 2, 3, or 3.5.

Specifically, the second section 22 is in transition fit or interference fit with the second bore section 12, and the second section 22 is used for limiting the relative displacement of the guide sleeve 20 and the valve seat 10. Through the arrangement, the guide sleeve 20 can be fixedly connected with the valve seat 10, and the guide sleeve 20 is prevented from displacing in the operation process of the device, so that the stability of the device in operation is ensured.

Furthermore, the second section 22 and the third section 23 are arranged in a stepped manner, the second section 22 is arranged corresponding to the second hole section 12, and the third section 23 is arranged in the third hole section 13 and the valve cavity 14 in a penetrating manner. The second section 22 and the third section 23 are arranged in a step shape and are respectively arranged corresponding to the second hole section 12, the third hole section 13 and the valve cavity 14, so that the guide sleeve 20 is favorably guided in the installation process, the guide sleeve 20 is convenient to install, and the assembly efficiency is improved.

In particular, the valve chamber 14 has a diameter smaller than the diameter of the third bore section 13. This reduces the resonance of the fluid flowing through the valve chamber 14, thereby reducing the noise of the device during operation.

As shown in fig. 5, the third section 23 has a diameter d 1. The diameter d1 of the third section 23 and the diameter of the third bore section 13 are in a ratio of between 0.85 and 1. The arrangement is such that there is a gap between the third section 23 and the third bore section 13, while the noise reduction of the device is further improved according to the resonance cavity principle. If the third section 23 and the third hole section 13 are set in a proportional relationship of less than 0.85 or more than 1, the noise of the air flow when the fluid flows through the gap is increased, thereby affecting the noise reduction effect of the device.

Specifically, the gap between the first section 21 and the first bore section 11 is between 2mm and 4mm, and the gap between the tangent structure 24 and the second bore section 12 is between 1mm and 2 mm. Therefore, the gaps can form a balance passage together, the pressure in the hole section can be ensured to be stable, the pressure pulsation generated when fluid flows through the valve cavity 14 is reduced, and the noise reduction effect of the device is further improved. In the present embodiment, the gap between the first section 21 and the first hole section 11 may be specifically 2mm, 3mm or 4 mm. The gap between the tangential structure 24 and the second bore section 12 may in particular be 1mm, 1.5mm or 2 mm.

Further, the electronic expansion valve further includes: a housing 30, a nut sleeve 40, a screw 50 and a needle assembly 60. The outer shell 30 is connected with the valve seat 10, an accommodating cavity 31 is formed between the outer shell 30 and the valve seat 10, the nut sleeve 40 is arranged in the accommodating cavity 31, the screw rod 50 is movably arranged in the accommodating cavity 31, the screw rod 50 penetrates through the nut sleeve 40 and is in threaded connection with the nut sleeve 40, the valve needle assembly 60 is movably arranged in the guide sleeve 20, one end of the valve needle assembly 60 is connected with the screw rod 50, and the screw rod 50 drives the valve needle assembly 60 to move so as to open or close the valve port 15. By moving the valve needle assembly 60 between the open and closed positions, the receiving chamber 31 can communicate with the valve chamber 14, and the pressure in the receiving chamber 31 can be consistent with that in the valve chamber 14, thereby ensuring the stability of the device during operation.

Through the technical scheme that this application provided, set up two tangent plane structures 24 on uide bushing 20 lateral wall, with first hole section 11, second hole section 12, third hole section 13 and the 14 ladder settings of valve pocket, make have the clearance between tangent plane structure 24 and the third hole section 13, utilize the resonant cavity principle, not only make valve pocket 14 and first hole section 11, second hole section 12, the pressure of third hole section 13 keep unanimous, form a pressure buffer chamber in holding chamber 31, also can reduce the fluid and flow through the pressure fluctuation that the valve pocket 14 produced because of the torrent simultaneously, reduce this kind of pressure fluctuation through balanced passageway and holding chamber 31, thereby can reduce the noise that the refrigerant produced when flowing through the electron inflation, the normal use of electronic expansion valve has been guaranteed, user's comfort level experience has been improved. Meanwhile, the second section 22 and the second hole section 12 are in transition fit or interference fit, and can fixedly connect the guide sleeve 20 with the valve seat 10, so that the guide sleeve 20 is prevented from displacing in the operation process of the device, and the stability of the device in operation is ensured.

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:

the valve seat (10) is provided with a first hole section (11), a second hole section (12), a third hole section (13) and a valve cavity (14), wherein the first hole section (11), the second hole section (12) and the third hole section (13) are sequentially communicated, the first hole section (11), the second hole section (12) and the third hole section (13) are arranged in a step shape, and a valve port (15) is located at one end, far away from the first hole section (11), of the valve cavity (14);

the guide sleeve (20) is arranged in the first hole section (11), the second hole section (12), the third hole section (13) and the valve cavity (14) in a penetrating mode, the guide sleeve (20) is provided with a first section (21), a second section (22) and a third section (23) which are sequentially connected along the axial direction, a first gap is formed between the first section (21) and the inner wall of the first hole section (11), two tangent plane structures (24) are symmetrically arranged on the side wall of the guide sleeve (20), the tangent plane structures (24) are located on the side walls of the second section (22) and the third section (23), the tangent plane structures (24) extend to the tail end of the third section (23) along one end, connected with the first section (21), of the second section (22) in the axial direction, and the tangent plane structures (24) and the second hole section (12) and the third hole section (13) are provided with a second gap, the first gap, the second gap and the valve cavity (14) are communicated with each other, and the ratio of the distance between the two tangent plane structures (24) to the diameter of the third hole section (13) is between 0.85 and 0.96.

2. An electronic expansion valve according to claim 1, wherein the third bore section (13) has a length L, the third bore section (13) has a diameter D, and the two sectional structures (24) are spaced apart by 0.5 (D-S) (1.2-3.5).

3. An electronic expansion valve according to claim 1, wherein the second section (22) is a transition or interference fit with the second bore section (12), the second section (22) being adapted to limit the relative displacement of the guide sleeve (20) and the valve seat (10).

4. An electronic expansion valve according to claim 1, wherein the second section (22) and the third section (23) are arranged in a stepped manner, the second section (22) is arranged corresponding to the second bore section (12), and the third section (23) is arranged through the third bore section (13) and the valve chamber (14).

5. An electronic expansion valve according to claim 1, wherein the diameter of the valve chamber (14) is smaller than the diameter of the third bore section (13).

6. An electronic expansion valve according to claim 1, wherein the diameter of the third section (23) and the diameter of the third bore section (13) have a relation of between 0.85 and 1, by way of example.

7. An electronic expansion valve according to claim 1, wherein the gap between the first section (21) and the first bore section (11) is between 2mm and 4mm, and the gap between the tangential structure (24) and the second bore section (12) is between 1mm and 2 mm.

8. The electronic expansion valve of claim 1, further comprising:

a housing (30) connected to the valve seat (10), the housing (30) and the valve seat (10) having a receiving chamber (31) therebetween;

a nut sleeve (40) arranged in the accommodating cavity (31);

the screw rod (50) is movably arranged in the accommodating cavity (31), and the screw rod (50) penetrates through the nut sleeve (40) and is in threaded connection with the nut sleeve (40);

the valve needle assembly (60) is movably arranged in the guide sleeve (20), one end of the valve needle assembly (60) is connected with the screw rod (50), and the screw rod (50) drives the valve needle assembly (60) to move so as to open or close the valve port (15).