CN213776373U

CN213776373U - Electronic expansion valve

Info

Publication number: CN213776373U
Application number: CN202022481499.6U
Authority: CN
Inventors: 贺宇辰; 徐冠军; 江超; 张克鹏
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-23
Anticipated expiration: 2030-10-30

Abstract

The utility model provides an electronic expansion valve. The electronic expansion valve includes: the valve seat is provided with a valve cavity and a valve port communicated with the valve cavity; the guide cylinder is arranged in the valve cavity and is connected with the cavity wall of the valve cavity; the valve needle can movably penetrate through the guide cylinder to block or avoid the valve port; the first silencing structure is arranged on the surface of the guide cylinder facing the valve port and/or on the cavity wall of the valve cavity facing the valve port. The utility model discloses the problem that sets up the amortization structure in electronic expansion valve influences the normal flow of fluid among the prior art has been solved effectively.

Description

Electronic expansion valve

Technical Field

The utility model relates to a valve body technical field particularly, relates to an electronic expansion valve.

Background

At present, in the process of throttling the fluid by the electronic expansion valve, if the two-phase fluid flows unstably or is two-phase discontinuous fluid before throttling, bubbles are different in size, and discontinuous noise is easily generated.

In order to solve the above problem, in the prior art, a noise reduction structure is generally provided in a valve pipe of an electronic expansion valve. However, if impurities accumulate in the silencing structure during long-term use of the silencing structure, the installation position is likely to cause the fluid to be blocked in the electronic expansion valve, which affects the normal use of the electronic expansion valve.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide an electronic expansion valve to solve the problem that the noise reduction structure in the electronic expansion valve in the prior art affects the normal flow of fluid.

In order to achieve the above object, the present invention provides an electronic expansion valve, including: the valve seat is provided with a valve cavity and a valve port communicated with the valve cavity; the guide cylinder is arranged in the valve cavity and is connected with the cavity wall of the valve cavity; the valve needle can movably penetrate through the guide cylinder to block or avoid the valve port; the first silencing structure is arranged on the surface of the guide cylinder facing the valve port and/or on the cavity wall of the valve cavity facing the valve port.

Use the technical scheme of the utility model, electronic expansion valve include first amortization structure, and when the fluid got into the valve intracavity, the fluid can with first amortization structure direct contact to refine the inhomogeneous bubble of size in the fluid through first amortization structure, and then reduce fluidic noise around the throttle. Like this, first amortization structure in this application sets up on the surface of guide cylinder towards the valve port and/or on the cavity wall of valve pocket towards the valve port, in the long-term use of first amortization structure, even accumulate impurity in the first amortization structure, can not influence the normal flow of fluid in electronic expansion valve yet, and then has solved the problem that the amortization structure that sets up among the prior art in electronic expansion valve influences the normal flow of fluid.

Further, first amortization structure has the via hole that is used for supplying the needle to pass, has preset distance between the pore wall of via hole and the surface of needle, and preset distance is more than or equal to 0.02mm and is less than 0.1 mm. On one hand, the arrangement ensures that the valve needle can move up and down in the valve cavity, and improves the operation reliability of the electronic expansion valve; on the other hand, the liquid outlet amount or the air exhaust amount of the electronic expansion valve is reduced due to the fact that the fluid enters the guide cylinder through the through hole.

Further, the first silencing structure is a silencing hole plate, and the porosity of the silencing hole plate is greater than or equal to 65% and less than or equal to 90%. Above-mentioned setting ensures that the amortization orifice plate can refine the bubble in the fluid, has promoted the amortization efficiency of first amortization structure. Simultaneously, above-mentioned setting makes the structure of first amortization structure simpler, and easy processing, realization have reduced the processing cost of first amortization structure.

Further, a surface of the first sound deadening structure facing the valve port has a recess. Above-mentioned setting has increased the area of contact of first amortization structure with the fluid, has further promoted the amortization efficiency of first amortization structure.

Further, the recess communicates with the via hole. The structure of above-mentioned setting messenger's first amortization structure is simpler, and easy processing, realization have reduced the processing cost of first amortization structure.

Furthermore, the concave part is a hole section, and the valve needle is arranged in the hole section in a penetrating mode; the hole section is a conical hole, and the inner diameter of the conical hole is gradually increased along the direction from the first silencing structure to the valve port; or the hole section is a straight hole, and the inner diameter of the straight hole is larger than that of the via hole. A stepped hole is formed between the through hole and the concave part so as to increase the contact area of the fluid and the first silencing structure. Meanwhile, the concave part is simpler in structure and easy to process and realize due to the arrangement.

Furthermore, the concave part is a groove, and the bottom of the groove is an arc-shaped surface. The arrangement increases the contact area of the fluid and the first silencing structure on one hand, and improves the silencing efficiency of the first silencing structure; on the other hand, the impact of the fluid on the first silencing structure is more gentle, and the impact noise is avoided.

Furthermore, the groove and the via hole are mutually independent, and the groove is an annular groove or an arc groove section or a polygonal groove; or the groove bottom of the groove is communicated with the through hole. The arrangement makes the processing of the groove easier and more convenient, and reduces the processing difficulty.

Further, the valve seat still has the mounting hole, and the mounting hole communicates with the valve pocket, and electronic expansion valve still includes: the first pipeline is arranged in the mounting hole; the second pipeline is arranged on the valve seat and communicated with the valve port; wherein, first sound attenuation structure extends towards the valve port to make the orthographic projection of at least part first sound attenuation structure in first pipeline. The first silencing structure can also refine bubbles in the fluid when the fluid enters the valve chamber 11 through the first pipe 50 to reduce noise generated during the fluid flowing process.

Further, the electronic expansion valve further includes: the second silencing structure is arranged in the first pipeline; and/or a third sound attenuating structure disposed within the second conduit. In the fluid gets into electronic expansion valve through the second pipeline and through the in-process that first pipeline was discharged, the third amortization structure can tentatively fall the noise to the fluid that gets into in the second pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction. In the fluid gets into electronic expansion valve through first pipeline and through the in-process of second pipeline exhaust, the second amortization structure can tentatively fall the noise to the fluid that gets into in the first pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, 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 shows a cross-sectional view of an embodiment one of an electronic expansion valve according to the present invention;

fig. 2 shows a cross-sectional view of a first sound attenuating structure of the electronic expansion valve of fig. 1;

fig. 3 shows a cross-sectional view of a first sound attenuating structure of a second embodiment of an electronic expansion valve according to the invention;

fig. 4 shows a cross-sectional view of a first sound attenuating structure of a third embodiment of an electronic expansion valve according to the present invention; and

fig. 5 shows a cross-sectional view of a first sound damping structure of a fourth embodiment of an electronic expansion valve according to the present invention.

Wherein the figures include the following reference numerals:

10. a valve seat; 11. a valve cavity; 12. a valve port; 13. mounting holes; 20. a guide cylinder; 30. a valve needle; 40. a first sound attenuating structure; 41. a via hole; 42. a recess; 50. a first conduit; 60. a second conduit.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, 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 application belongs.

In the present invention, unless otherwise specified, the use of directional words such as "upper and lower" is generally in reference to the orientation shown in the drawings, or to the vertical, perpendicular or gravitational orientation; likewise, for ease of understanding and description, "left and right" are generally to the left and right as shown in the drawings; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself, but the above directional terms are not intended to limit the present invention.

In order to solve the problem that the silencing structure arranged in the electronic expansion valve influences the normal flow of fluid in the prior art, the application provides the electronic expansion valve.

Example one

As shown in fig. 1 and 2, the electronic expansion valve includes a valve seat 10, a guide cylinder 20, a valve needle 30, and a first noise reduction structure 40. The valve seat 10 has a valve chamber 11 and a valve port 12 communicating with the valve chamber 11. The guide cylinder 20 is arranged in the valve cavity 11 and connected with the cavity wall of the valve cavity 11. The valve needle 30 is movably disposed through the guide cylinder 20 to block or avoid the valve port 12. The first silencing structure 40 is disposed on the surface of the guide cylinder 20 facing the valve port 12.

By applying the technical scheme of the embodiment, the electronic expansion valve comprises the first silencing structure 40, when fluid enters the valve cavity 11, the fluid can be in direct contact with the first silencing structure 40, so that bubbles with uneven sizes in the fluid are refined through the first silencing structure 40, and then the noise of the fluid before and after throttling is reduced. In this way, the first silencing structure 40 in this embodiment is disposed on the surface of the guide cylinder 20 facing the valve port 12, so that even if impurities accumulate in the first silencing structure 40 during long-term use of the first silencing structure 40, normal flow of fluid in the electronic expansion valve is not affected, and the problem that the silencing structure disposed in the electronic expansion valve affects normal flow of fluid in the prior art is solved.

In other embodiments, not shown in the drawings, the first sound attenuating structure is provided on a wall of the valve chamber facing the valve port. Therefore, in the long-term use process of the first silencing structure, even if impurities are accumulated in the first silencing structure, the normal flow of the fluid in the electronic expansion valve cannot be influenced, and the problem that the silencing structure arranged in the electronic expansion valve influences the normal flow of the fluid in the prior art is solved.

In other embodiments, which are not shown in the figures, the first sound-attenuating structure is arranged on the surface of the guide cylinder facing the valve port and on the wall of the valve chamber facing the valve port. Therefore, in the long-term use process of the first silencing structure, even if impurities are accumulated in the first silencing structure, the normal flow of the fluid in the electronic expansion valve cannot be influenced, and the problem that the silencing structure arranged in the electronic expansion valve influences the normal flow of the fluid in the prior art is solved. Simultaneously, the area of contact of first amortization structure and disk seat and guide cylinder has been increased in above-mentioned setting, and then has promoted the noise cancelling effect of first amortization structure.

As shown in fig. 2, the first noise dampening structure 40 has a through hole 41 for the valve needle 30 to pass through, and a preset distance is provided between the hole wall of the through hole 41 and the outer surface of the valve needle 30, and the preset distance is greater than or equal to 0.02mm and less than 0.1 mm. Thus, the arrangement ensures that the valve needle 30 can move up and down in the valve cavity 11, and improves the operation reliability of the electronic expansion valve; on the other hand, the fluid is prevented from entering the guide cylinder 20 through the through hole 41, which results in the reduction of the liquid discharge amount or the air discharge amount of the electronic expansion valve.

In the present embodiment, the preset distance is 0.05 mm. It should be noted that the selection of the preset distance is not limited to this. Optionally, the predetermined distance is 0.03mm, or 0.04mm, or 0.06mm, or 0.07mm, or 0.08mm, or 0.09 mm.

Optionally, the first silencing structure 40 is a silencing hole plate, and the porosity of the silencing hole plate is greater than or equal to 65% and less than or equal to 90%. Thus, the arrangement ensures that the silencing orifice plate can refine bubbles in the fluid, and improves the silencing efficiency of the first silencing structure 40. Meanwhile, the structure of the first silencing structure 40 is simpler, the first silencing structure is easy to process and realize, and the processing cost of the first silencing structure 40 is reduced.

As shown in fig. 1, the valve seat 10 further has a mounting hole 13, the mounting hole 13 communicates with the valve chamber 11, and the electronic expansion valve further includes a first conduit 50 and a second conduit 60. The first duct 50 is disposed in the mounting hole 13. The second conduit 60 is disposed on the valve seat 10 and communicates with the valve port 12. Wherein the first sound attenuating structure 40 extends toward the valve port 12 such that an orthographic projection of at least a portion of the first sound attenuating structure 40 is within the first conduit 50. In this way, when the fluid enters the valve chamber 11 through the first pipe 50, the first sound deadening structure 40 can also refine bubbles in the fluid to reduce noise generated during the fluid flow.

Specifically, when the electronic expansion valve is in the first working state, the fluid enters the valve chamber 11 through the second pipe 60 and the valve port 12, the fluid is in front contact with the first sound attenuating structure 40, and the first sound attenuating structure 40 refines bubbles in the fluid to reduce fluid noise. When the electronic expansion valve is in the second working state, the fluid enters the valve cavity 11 through the first pipe 50 and the mounting hole 13, and the fluid can contact with part of the first sound deadening structure 40 to be refined by the bubbles in the fluid of the first sound deadening structure 40, so as to reduce the fluid noise.

In this embodiment, the first silencing structure 40 is welded to the guide cylinder 20, so as to improve the connection strength between the first silencing structure 40 and the guide cylinder 20, and prevent the mutual separation between the first silencing structure and the guide cylinder from affecting the normal use of the electronic expansion valve.

The connection manner of the first silencing structure 40 and the guide cylinder 20 is not limited to this. Optionally, the first sound attenuating structure 40 is riveted to the guide cylinder 20. Optionally, the first sound attenuating structure 40 is crimped to the guide cylinder 20.

In the present embodiment, the via hole 41 is a straight hole. Thus, the arrangement makes the processing of the via hole 41 easier and simpler, and reduces the processing difficulty and the processing cost.

Example two

The electronic expansion valve in the second embodiment is different from the first embodiment in that: the first sound attenuating structure 40 is different in structure.

As shown in fig. 3, the surface of the first sound attenuating structure 40 facing the valve port 12 has a recess 42. Thus, the contact area of the first silencing structure 40 and the fluid is increased, and the silencing efficiency of the first silencing structure 40 is further improved.

In the present embodiment, the recess 42 communicates with the via hole 41. Like this, above-mentioned setting makes the structure of first amortization structure 40 simpler, and easy processing, realization have reduced the processing cost of first amortization structure 40.

In other embodiments not shown in the drawings, the recess is spaced apart from and not communicated with the through hole, and the recess is located outside the through hole to increase a contact area of the first sound deadening structure with the fluid. Optionally, the recess is an annular or arcuate slot.

As shown in fig. 3, the recess 42 is a hole section, and the valve pin 30 is inserted into the hole section, wherein the hole section is a straight hole, and the inner diameter of the straight hole is larger than that of the through hole 41. In this way, a stepped hole is formed between the through hole 41 and the concave portion 42 to increase the contact area of the fluid with the first sound deadening structure 40. Meanwhile, the arrangement makes the structure of the concave part 42 simpler, and the processing and the realization are easy.

EXAMPLE III

The difference between the electronic expansion valve in the third embodiment and the second embodiment is that: the recess 42 is different in structure.

As shown in fig. 4, the hole section is a tapered hole, and the inner diameter of the tapered hole gradually increases along the direction from the first sound attenuating structure 40 to the valve port 12. Thus, the contact area between the first silencing structure 40 and the fluid is further increased by the arrangement, and the silencing efficiency of the first silencing structure 40 is further improved. Simultaneously, the structure of the hole section is more diversified by the arrangement, and the processing difficulty of the hole section is reduced.

Example four

The difference between the electronic expansion valve in the fourth embodiment and the second embodiment is that: the recess 42 is different in structure.

As shown in fig. 5, the concave portion 42 is a groove, and the bottom of the groove is an arc-shaped surface. Thus, the arrangement increases the contact area between the fluid and the first silencing structure 40 on one hand, and improves the silencing efficiency of the first silencing structure 40; on the other hand, the impact of the fluid on the first sound attenuation structure 40 is more gradual, and the impact noise is avoided.

In the present embodiment, the groove bottom of the groove communicates with the via hole 41. Therefore, the groove is easier and simpler to process by the arrangement, and the processing difficulty is reduced.

In other embodiments not shown in the drawings, the grooves are independent of the vias, and the grooves are circular grooves or arc-shaped groove segments or polygonal grooves. Therefore, the groove is easier and simpler to process by the arrangement, and the processing difficulty is reduced.

EXAMPLE five

The difference between the electronic expansion valve in the fifth embodiment and the first embodiment is that: the electronic expansion valve has different structures.

In this embodiment, the electronic expansion valve further includes a second sound deadening structure. Wherein the second sound attenuating structure is disposed within the first duct. Like this, in the fluid gets into electronic expansion valve through first pipeline and through the in-process of second pipeline exhaust, the second amortization structure can tentatively fall the noise to the fluid that gets into in the first pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction.

In other embodiments not shown in the figures, the electronic expansion valve further comprises a third sound attenuating structure. Wherein the third muffling structure is arranged in the second pipeline. Like this, in the fluid gets into electronic expansion valve through the second pipeline and through the in-process that first pipeline was discharged, the third amortization structure can tentatively fall the noise to the fluid that gets into in the second pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction.

In other embodiments not shown in the figures, the electronic expansion valve further comprises a second sound attenuating structure and a third sound attenuating structure. Wherein the second sound attenuating structure is disposed within the first duct. The third silencing structure is arranged in the second pipeline. Specifically, in the fluid gets into electronic expansion valve through the second pipeline and through the in-process that first pipeline was discharged, the third amortization structure can tentatively fall the noise to the fluid that gets into in the second pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction. In the fluid gets into electronic expansion valve through first pipeline and through the in-process of second pipeline exhaust, the second amortization structure can tentatively fall the noise to the fluid that gets into in the first pipeline, and first amortization structure can further fall the noise to the fluid, and then has promoted electronic expansion valve's noise reduction.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the electronic expansion valve comprises a first silencing structure, when fluid enters the valve cavity, the fluid can be in direct contact with the first silencing structure, bubbles with uneven sizes in the fluid are refined through the first silencing structure, and then noise of the fluid before and after throttling is reduced. Like this, first amortization structure in this application sets up on the surface of guide cylinder towards the valve port and/or on the cavity wall of valve pocket towards the valve port, in the long-term use of first amortization structure, even accumulate impurity in the first amortization structure, can not influence the normal flow of fluid in electronic expansion valve yet, and then has solved the problem that the amortization structure that sets up among the prior art in electronic expansion valve influences the normal flow of fluid.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

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 is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

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 seat (10) having a valve cavity (11) and a valve port (12) communicating with the valve cavity (11);

the guide cylinder (20) is arranged in the valve cavity (11) and is connected with the cavity wall of the valve cavity (11);

a valve needle (30), wherein the valve needle (30) is movably arranged in the guide cylinder (20) in a penetrating way to block or avoid the valve port (12);

a first sound-absorbing structure (40) is arranged on the surface of the guide cylinder (20) facing the valve port (12) and/or on the wall of the valve cavity (11) facing the valve port (12).

2. An electronic expansion valve according to claim 1, wherein the first sound-damping structure (40) has a through-hole (41) for the valve needle (30) to pass through, a predetermined distance being provided between a hole wall of the through-hole (41) and an outer surface of the valve needle (30), the predetermined distance being greater than or equal to 0.02mm and smaller than 0.1 mm.

3. An electronic expansion valve according to claim 1, wherein the first muffling structure (40) is a muffling orifice plate having a porosity of 65% or more and 90% or less.

4. An electronic expansion valve according to claim 2, wherein a surface of the first sound-attenuating structure (40) facing the valve port (12) has a recess (42).

5. An electronic expansion valve according to claim 4, wherein the recess (42) communicates with the through hole (41).

6. An electronic expansion valve according to claim 5, wherein the recess (42) is a bore section in which the valve needle (30) is arranged; wherein the content of the first and second substances,

the hole section is a conical hole, and the inner diameter of the conical hole is gradually increased along the direction from the first silencing structure (40) to the valve port (12); or

The hole section is a straight hole, and the inner diameter of the straight hole is larger than that of the via hole (41).

7. An electronic expansion valve according to claim 4, wherein the recess (42) is a groove, the groove bottom of which is an arc-shaped surface.

8. The electronic expansion valve of claim 7,

the groove and the via hole (41) are mutually independent, and the groove is an annular groove or an arc groove section or a polygonal groove; or

The groove bottom of the groove is communicated with the through hole (41).

9. An electronic expansion valve according to claim 1, wherein the valve seat (10) further has a mounting hole (13), the mounting hole (13) communicating with the valve chamber (11), the electronic expansion valve further comprising:

a first duct (50) disposed within the mounting hole (13);

a second conduit (60) disposed on the valve seat (10) and communicating with the valve port (12);

wherein the first sound attenuating structure (40) extends towards the valve port (12) such that an orthographic projection of at least a portion of the first sound attenuating structure (40) is within the first conduit (50).

10. The electronic expansion valve of claim 9, further comprising:

a second silencing structure arranged inside the first duct (50); and/or

A third sound attenuating structure disposed within the second conduit (60).