CN112963614A

CN112963614A - Noise reduction sleeve and electronic expansion valve

Info

Publication number: CN112963614A
Application number: CN201911185386.7A
Authority: CN
Inventors: 曾庆军; 贺宇辰; 徐冠军
Original assignee: Zhejiang DunAn Hetian Metal Co Ltd
Current assignee: Zhejiang DunAn Hetian Metal Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2021-06-15
Also published as: JP7479467B2; WO2021103752A1; KR20220100688A; JP2023503407A

Abstract

The invention provides a noise reduction sleeve and an electronic expansion valve, wherein the noise reduction sleeve is used for the electronic expansion valve and is of a cylindrical structure, the noise reduction sleeve is provided with a flow equalizing cavity, a plurality of notches are arranged on the side wall of the noise reduction sleeve, each notch is communicated with the flow equalizing cavity, the notches extend along the axial direction of the noise reduction sleeve, and one end of each notch extends to the lower end face of the noise reduction sleeve. Through the technical scheme that this application provided, can solve the big problem of electronic expansion valve noise among the prior art.

Description

Noise reduction sleeve and electronic expansion valve

Technical Field

The invention relates to the technical field of electronic expansion valves, in particular to a noise reduction sleeve and an electronic expansion valve.

Background

Generally, an electronic expansion valve includes a housing, a valve needle assembly, an inlet pipe and an outlet pipe, wherein a valve port is disposed in the housing, the valve needle assembly is disposed corresponding to the valve port, and the inlet pipe and the outlet pipe are both disposed on the housing. Specifically, the valve needle assembly is movably arranged in the shell and controls the communication condition of the inlet pipe and the outlet pipe by controlling the opening and closing of the valve port in the shell.

In the prior art, when a refrigerant enters the electronic expansion valve from the inlet pipe, the refrigerant directly impacts components in the electronic expansion valve, and generates large noise. Therefore, the prior art has the problem that the noise of the electronic expansion valve is large.

Disclosure of Invention

The invention provides a noise reduction sleeve and an electronic expansion valve, which aim to solve the problem that the electronic expansion valve in the prior art is high in noise.

According to one aspect of the invention, a noise reduction sleeve is provided and used for an electronic expansion valve, the noise reduction sleeve is of a cylindrical structure, the noise reduction sleeve is provided with a flow equalizing cavity, a plurality of notches are arranged on the side wall of the noise reduction sleeve, each notch is communicated with the flow equalizing cavity, the notches extend along the axial direction of the noise reduction sleeve, and one end of each notch extends to the lower end face of the noise reduction sleeve.

Furthermore, the outer wall and/or the inner wall of the noise reduction sleeve are/is provided with a turbulence structure, and the turbulence structure is used for performing turbulence on the refrigeration medium.

Further, the vortex structure includes a plurality of vortex bosss, and a plurality of vortex bosss set up on the outer wall of falling the cover of making an uproar, and the vortex boss extends along the axis direction of falling the cover of making an uproar, and a plurality of vortex bosss set up along the circumference interval of falling the cover of making an uproar.

Further, the breach includes first section and the second section of intercommunication each other, and first section is located the top of second section, and the inner wall of first section is the curved surface, and the inner wall of second section is the plane.

Further, a plurality of gaps are arranged along the circumferential direction of the side wall of the noise reduction sleeve at intervals.

According to another aspect of the present invention, there is provided an electronic expansion valve including: a housing; a nut assembly disposed within the housing; the noise reduction sleeve is provided with a first end and a second end which are oppositely arranged, the first end of the noise reduction sleeve is connected with the nut component, and the noise reduction sleeve is provided for the noise reduction sleeve.

Further, the nut component comprises a nut seat, a positioning structure is arranged between the nut seat and the noise reduction sleeve, and the positioning structure is used for positioning the orientation of the notch of the noise reduction sleeve.

Furthermore, a first mounting boss is arranged at the bottom of the nut seat, the first mounting boss and the nut seat are coaxially arranged, the first end sleeve of the noise reduction sleeve is arranged on the first mounting boss, one of the outer wall of the first mounting boss and the inner wall of the noise reduction sleeve is provided with a positioning boss, the other of the outer wall of the first mounting boss and the inner wall of the noise reduction sleeve is provided with a positioning groove, and the positioning boss and the positioning groove are matched to form a positioning structure.

Furthermore, the electronic expansion valve further comprises a valve seat core, the valve seat core and the nut assembly are arranged in the shell at intervals, a second mounting boss is arranged at the top of the valve seat core, the second mounting boss and the valve seat core are coaxially arranged, and a second end sleeve of the noise reduction sleeve is arranged on the second mounting boss.

Furthermore, a medium inlet is formed in the shell, and an included angle between the central line of the notch of the noise reduction sleeve close to the medium inlet and the axis of the medium inlet is 45 degrees.

By applying the technical scheme of the invention, the noise reduction sleeve is of a cylindrical structure and is provided with the flow equalizing cavity. Specifically, fall and be provided with a plurality of breachs on the lateral wall of making an uproar cover, every breach all with flow equalizing cavity intercommunication, when the refrigerant entered from electronic expansion valve's import, the drainage effect of accessible breach changed fluidic form to utilize the flow equalizing cavity to flow equalize the refrigerant, avoid the refrigerant direct impact electronic expansion valve in the part, can the noise reduction. And, the breach extends along the axis direction of making an uproar the cover of making an uproar, and the one end of breach extends to the lower terminal surface of making an uproar the cover of making an uproar, so is convenient for fall the cover of making an uproar and process, the assembly of being convenient for.

Drawings

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

FIG. 1 is a schematic structural diagram of a noise reduction sleeve provided in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of another embodiment of a noise reduction sleeve provided in accordance with an embodiment of the present invention;

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

FIG. 4 shows a cross-sectional view at A-A in FIG. 3;

fig. 5 is a schematic diagram illustrating a further structure of an electronic expansion valve according to an embodiment of the present invention;

fig. 6 shows a cross-sectional view at B-B in fig. 5.

Wherein the figures include the following reference numerals:

10. a flow equalizing cavity;

20. a notch; 21. a first stage; 22. a second stage;

30. a turbulent flow structure; 31. a turbulence boss;

40. a housing; 41. a media inlet;

50. a nut assembly; 51. a nut seat; 511. a first mounting boss;

60. a noise reduction sleeve;

70. a positioning structure; 71. positioning the boss; 72. a positioning groove;

80. a valve seat core; 81. a second mounting boss;

a. the included angle between the central line of the notch close to the medium inlet and the axis of the medium inlet.

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 invention, 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, an embodiment of the present invention provides a noise reduction sleeve for an electronic expansion valve. The noise reduction sleeve is of a cylindrical structure, and is preferably made of a non-metal material through an injection molding process. In this embodiment, the noise reduction sleeve is of cylindrical configuration. Specifically, the noise reduction sleeve is provided with a flow equalizing cavity 10, and the flow equalizing cavity 10 can equalize the flow of the refrigerating medium. In this embodiment, be provided with a plurality of breachs 20 on the lateral wall of the cover of making an uproar falls, every breach 20 all communicates with flow equalizing cavity 10, and in refrigeration medium can get into flow equalizing cavity 10 through breach 20, utilizes flow equalizing cavity to flow equalize refrigeration medium. In the present embodiment, the notch 20 extends along the axial direction of the noise reduction sleeve, and one end of the notch 20 extends to the lower end surface of the noise reduction sleeve.

Use the cover of making an uproar of falling that this embodiment provided, through set up a plurality of breachs 20 on the lateral wall of the cover of making an uproar of falling, make every breach 20 all with flow equalizing cavity 10 intercommunication, when the refrigerant enters from electronic expansion valve's import, the refrigerant can change fluidic mobile form through breach 20 drainage effect, and in the entering flow equalizing cavity 10, utilize the flow equalizing cavity to flow equalize the refrigerant, avoid the refrigerant direct impact to the part in the electronic expansion valve, play the effect of noise reduction. And, set up the breach 20 as to extend along the axial direction of making an uproar cover of making an uproar to make the lower terminal surface that makes an uproar cover of making an uproar 20 extend, be convenient for make an uproar cover of making an uproar and process and assemble.

As shown in FIG. 2, the outer wall of the noise reduction sleeve is provided with a turbulent flow structure 30, and the turbulent flow structure 30 is used for performing turbulent flow on the refrigeration medium, so that the flow state of the refrigeration medium is changed, and the noise reduction effect can be further improved. Wherein, the turbulent flow structure 30 includes a turbulent flow boss, a turbulent flow groove and other structures with turbulent flow function. In other embodiments, the flow perturbation structure 30 may be disposed on the inner wall of the noise reduction sleeve, or both the inner and outer walls of the noise reduction sleeve may be disposed with the flow perturbation structure 30.

In this embodiment, vortex structure 30 includes a plurality of vortex bosss 31, and a plurality of vortex bosss 31 set up on the outer wall of the cover of making an uproar that falls, utilize vortex boss 31 to carry out the vortex to the refrigeration medium, can further promote the noise reduction effect. Specifically, the vortex boss 31 extends along the axis direction of the noise reduction sleeve, and the plurality of vortex bosses 31 are arranged along the circumferential interval of the noise reduction sleeve. In this embodiment, two ends of the spoiler boss 31 extend to the upper and lower end surfaces of the noise reduction sleeve, respectively. Specifically, be provided with a vortex boss 31 between two adjacent breach 20, the top of each breach 20 is provided with a vortex boss 31, and the both ends that are located vortex boss 31 between two adjacent breach 20 extend to the upper and lower terminal surface of falling the cover of making an uproar respectively, and the both ends that are located the vortex boss 31 of breach 20 top extend to the up end of falling the cover of making an uproar and the top of breach 20 respectively.

Wherein the notch 20 comprises a first section 21 and a second section 22 which are communicated with each other, and the first section 21 is positioned above the second section 22. Specifically, the inner wall of the first section 21 is a curved surface, and the inner wall of the second section 22 is a plane, so that the refrigerant can conveniently enter the flow equalizing cavity 10 from the notch 20, and the noise can be further reduced. In this embodiment, the inner wall of the first section 21 is of a semi-circular configuration.

In this embodiment, a plurality of notches 20 are circumferentially spaced along the sidewall of the noise reduction sleeve, and at least one notch 20 is disposed corresponding to the medium inlet of the electronic expansion valve. In this embodiment, four notches 20 are provided in the side wall of the noise reduction sleeve. In other embodiments, the number of the notches 20 may be set according to the circulation condition of the refrigerant medium. For example, three notches 20, or five notches 20, may be provided in the side walls of the noise damping sleeve.

As shown in fig. 3 to 6, an embodiment of the present invention provides an electronic expansion valve, which includes a housing 40, a nut assembly 50, and a noise reduction sleeve 60. Wherein the nut assembly 50 and the noise reduction sleeve 60 are both disposed within the housing 40. Wherein, the cover 60 of making an uproar falls has relative first end and the second end that sets up, and the first end of the cover 60 of making an uproar falls is connected with nut component 50, and the cover 60 of making an uproar falls for the above-mentioned cover that makes an uproar that falls that provides, so can utilize the cover 60 of making an uproar to fall to reduce the noise of electron expansion valve.

In this embodiment, the nut assembly 50 includes a nut seat 51, a positioning structure 70 is disposed between the nut seat 51 and the noise reduction sleeve 60, and the positioning structure 70 is used for positioning the orientation of the notch 20 of the noise reduction sleeve 60, so that the notch 20 faces a preset direction, and the noise reduction effect is ensured. Wherein, location structure 70 includes location boss and positioning groove matched with structure and pin and locating hole matched with structure, as long as can play the effect of fixing a position the orientation of breach 20.

As shown in fig. 5 and 6, the bottom of the nut seat 51 is provided with a first mounting boss 511, the first mounting boss 511 is coaxially disposed with the nut seat 51, and the first end of the noise reduction sleeve 60 is sleeved on the first mounting boss 511, so that the noise reduction sleeve 60 can be fixed in the housing 40. Specifically, one of the outer wall of the first mounting boss 511 and the inner wall of the noise reduction sleeve 60 is provided with a positioning boss 71, the other one of the outer wall of the first mounting boss 511 and the inner wall of the noise reduction sleeve 60 is provided with a positioning groove 72, and the positioning boss 71 and the positioning groove 72 are matched to form the positioning structure 70. In this embodiment, the inner wall of the noise reduction sleeve 60 is provided with a positioning boss 71, the outer wall of the first mounting boss 511 is provided with a positioning groove 72, and both the positioning boss 71 and the positioning groove 72 extend along the axial direction of the noise reduction sleeve 60. Specifically, the cross-sectional shapes of the positioning boss 71 and the positioning groove 72 are both semicircular, so that the positioning boss 71 can be conveniently inserted into the positioning groove 72 to play the roles of positioning and rotation stopping. In other embodiments, the positioning bosses 71 may be provided on the outer wall of the first mounting boss 511, and the positioning grooves 72 may be provided on the inner wall of the noise reduction sleeve 60.

In the present embodiment, the electronic expansion valve further includes a valve seat core 80, the valve seat core 80 is disposed in the housing 40 at a distance from the nut assembly 50, and the valve seat core 80 is provided with a valve port. Wherein, the top of valve seat core 80 is provided with second installation boss 81, and second installation boss 81 sets up with valve seat core 80 is coaxial, and the second pot head that will fall noise cover 60 is established on second installation boss 81, can utilize and fall noise cover 60 to lead nut seat 51 and valve seat core 80 to guarantee nut seat 51 and valve seat core 80's axiality, hoisting device's precision. Specifically, the noise reduction sleeve 60 is in interference fit with the valve seat core 80, and the noise reduction sleeve 60 is in transition or interference fit with the nut seat 51.

As shown in fig. 4, the casing 40 is provided with a medium inlet 41, and an included angle a between a central line of the notch 20 of the noise reduction sleeve 60 close to the medium inlet 41 and an axis of the medium inlet 41 is 45 °, so that a better flow equalization effect is achieved, and thus a noise reduction effect can be ensured. In other embodiments, the angle a between the centre line of the notch 20 of the noise reducing sleeve 60 near the medium inlet 41 and the axis of the medium inlet 41 may be 36 ° or 60 °, the angle a being 60 ° if the notch 20 is 3, and the angle a being 36 ° if the notch 20 is 5 flow openings.

In this embodiment, the noise reduction sleeve 60 is formed by injection molding of resin, and has the advantages of convenience in processing and low cost.

The device provided by the embodiment can change the fluid flow form by utilizing the drainage function of the plurality of arch-shaped notches 20, and can achieve the effect of reducing noise. In addition, one end of the notch 20 extends to the lower end face of the noise reduction sleeve, so that the noise reduction sleeve has the advantages of convenience in processing and assembly and low cost.

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. The utility model provides a cover of making an uproar falls for electronic expansion valve, its characterized in that, it is the tubular structure to fall the cover of making an uproar, it has flow equalizing chamber (10) to fall the cover of making an uproar, be provided with a plurality of breachs (20) on the lateral wall of the cover of making an uproar, every breach (20) all with flow equalizing chamber (10) intercommunication, breach (20) are followed the axis direction of the cover of making an uproar falls extends, the one end of breach (20) extends to the lower terminal surface of the cover of making an uproar falls.

2. The noise reduction sleeve according to claim 1, wherein a flow disturbing structure (30) is arranged on the outer wall and/or the inner wall of the noise reduction sleeve, and the flow disturbing structure (30) is used for disturbing flow of a refrigerating medium.

3. The noise reduction sleeve according to claim 2, wherein the turbulence structure (30) comprises a plurality of turbulence bosses (31), the turbulence bosses (31) are arranged on the outer wall of the noise reduction sleeve, the turbulence bosses (31) extend in the axial direction of the noise reduction sleeve, and the turbulence bosses (31) are arranged in the circumferential direction of the noise reduction sleeve at intervals.

4. The noise reduction sleeve according to claim 1, wherein the notch (20) comprises a first section (21) and a second section (22) which are communicated with each other, the first section (21) is positioned above the second section (22), the inner wall of the first section (21) is a curved surface, and the inner wall of the second section (22) is a flat surface.

5. The noise reduction sleeve according to claim 1, wherein a plurality of notches (20) are circumferentially spaced along the sidewall of the noise reduction sleeve.

6. An electronic expansion valve, comprising:

a housing (40);

a nut assembly (50) disposed within the housing (40);

a noise dampening sleeve (60), said noise dampening sleeve (60) having first and second oppositely disposed ends, said noise dampening sleeve (60) having said first end connected to said nut assembly (50), said noise dampening sleeve (60) being as defined in any one of claims 1 to 5.

7. An electronic expansion valve according to claim 6, wherein the nut assembly (50) comprises a nut seat (51), a positioning structure (70) being arranged between the nut seat (51) and the noise reducing sleeve (60), the positioning structure (70) being adapted to position the orientation of the indentation (20) of the noise reducing sleeve (60).

8. The electronic expansion valve according to claim 7, wherein a first mounting boss (511) is provided at the bottom of the nut seat (51), the first mounting boss (511) is coaxially provided with the nut seat (51), the noise reduction sleeve (60) is sleeved at the first mounting boss (511) at a first end, one of the outer wall of the first mounting boss (511) and the inner wall of the noise reduction sleeve (60) is provided with a positioning boss (71), the other one of the outer wall of the first mounting boss (511) and the inner wall of the noise reduction sleeve (60) is provided with a positioning groove (72), and the positioning boss (71) and the positioning groove (72) cooperate to form the positioning structure (70).

9. An electronic expansion valve according to claim 6, further comprising a valve seat core (80), wherein the valve seat core (80) and the nut assembly (50) are disposed in the housing (40) at an interval, a second mounting boss (81) is disposed on a top of the valve seat core (80), the second mounting boss (81) is disposed coaxially with the valve seat core (80), and a second end of the noise reduction sleeve (60) is fitted over the second mounting boss (81).

10. An electronic expansion valve according to claim 6, wherein the housing (40) is provided with a medium inlet (41), and the centre line of the recess (20) of the noise reducing sleeve (60) adjacent to the medium inlet (41) forms an angle of 45 ° with the axis of the medium inlet (41).