CN216158324U

CN216158324U - Electronic expansion valve

Info

Publication number: CN216158324U
Application number: CN202122116122.5U
Authority: CN
Inventors: 贺宇辰; 楼金强; 赵俊
Original assignee: ZHUHAI HUAYU METAL CO LTD
Current assignee: ZHUHAI HUAYU METAL CO LTD
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2022-04-01
Anticipated expiration: 2031-09-02

Abstract

The utility model provides an electronic expansion valve, which comprises a valve seat, a valve cavity and a valve port, wherein the valve seat is also provided with the valve port which is communicated with the valve cavity; the guide sleeve is fixedly matched with the valve seat, the guide sleeve is arranged opposite to the valve port, the guide sleeve comprises a main body section and a thin-wall section which are sequentially connected along the axial direction, the main body section is provided with a first end and a second end which are arranged oppositely, the thin-wall section is connected with the first end, the end surface of the first end and the thin-wall section are positioned in the valve cavity, the outer diameter of the thin-wall section is smaller than that of the first end, and the outer diameter of one end, close to the main body section, of the thin-wall section is larger than that of one end, far away from the main body section, of the thin-wall section; the valve needle is movably arranged in the guide sleeve, and the thin-wall section can guide the valve needle. Through the technical scheme that this application provided, can solve among the prior art problem that electronic expansion valve noise is big.

Description

Electronic expansion valve

Technical Field

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

Background

As a new type of control element, an electronic expansion valve has become an important part of the intelligence of a refrigeration system. The electronic expansion valve comprises a base, a guide sleeve and a valve needle, wherein the base is provided with a valve cavity, a valve port is arranged in the valve cavity, the guide sleeve is fixedly matched with the valve seat and is arranged opposite to the valve port, the valve needle is movably arranged in the guide sleeve, part of the valve needle penetrates through the guide sleeve and is positioned in the valve cavity, and the valve needle is used for controlling the opening and closing of the valve port. However, the existing guide sleeve, the end of which close to the valve port, usually forms a large step with the valve needle, and the formed step structure easily causes fluid to generate turbulence and generates noise, which affects the use experience of users.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electronic expansion valve, which aims to solve the problem that fluid is easy to generate turbulence and noise in the prior art.

The utility model provides an electronic expansion valve, which comprises a valve seat, a valve cavity and a valve port, wherein the valve seat is also provided with the valve port which is communicated with the valve cavity; the guide sleeve is fixedly matched with the valve seat, the guide sleeve is arranged opposite to the valve port, the guide sleeve comprises a main body section and a thin-wall section which are sequentially connected along the axial direction, the main body section is provided with a first end and a second end which are oppositely arranged, the thin-wall section is connected with the first end, the end face of the first end and the thin-wall section are positioned in the valve cavity, the outer diameter of the thin-wall section is smaller than that of the first end, and the outer diameter of one end, close to the main body section, of the thin-wall section is larger than that of one end, far away from the main body section, of the thin-wall section; the valve needle is movably arranged in the guide sleeve, part of the valve needle penetrates through the guide sleeve and is positioned in the valve cavity, the valve needle is used for controlling the opening and closing of the valve port, and the thin-wall section can guide the valve needle.

Through adopting the technical scheme that this application provided, when the fluid flowed into the valve chamber, the fluid contacted the needle and had certain impact force to needle and uide bushing. By the arrangement, the height difference of the step structure formed between one end, close to the valve port, of the guide sleeve and the valve needle can be reduced, so that the phenomenon of turbulent flow generated by fluid impacting the step structure can be reduced, and fluid noise generated when the electronic expansion valve works can be reduced.

Further, the difference between the outer diameter of the thin-walled section and the inner diameter of the thin-walled section is between 0.15mm and 1.5 mm. So set up, can guarantee the structural strength of thin wall section.

Further, along the direction from the thin-wall section to the main body section, the thin-wall section at least comprises one of a conical section and a straight line section. So set up, can make the uide bushing be applicable to the electronic expansion valve of isostructure not, improve the adaptability of uide bushing.

Further, along the direction of thin-walled section to main part section, the external diameter of thin-walled section increases gradually. With this arrangement, the fluid noise generated by abrupt change of the outer peripheral surface of the thin section of the fluid can be reduced.

Furthermore, the electronic expansion valve also comprises a first connecting pipe, wherein the first connecting pipe is arranged on the valve seat, the first connecting pipe is communicated with the valve cavity, and the axis of the first connecting pipe is vertical to the axis of the valve needle; the radius of the first connecting pipe is R, and the distance between the end face of the first end and the axis of the first connecting pipe is between R-0.5mm and R +0.5 mm. The distance between the end face of the first end and the axis of the first connecting pipe is set to be between R-0.5mm and R +0.5mm, so that the space of the valve cavity occupied by the guide sleeve can be reduced, the flowable space of fluid in the valve cavity is ensured, the phenomenon of turbulence generated due to the fact that the flowable space of the fluid is too small is reduced, and fluid noise generated in the working process of the electronic expansion valve can be reduced.

Further, the distance between the end face of the first end and the axis of the first connecting pipe is R. So set up, can enough guarantee the guide sleeve to the direction effect of needle, also can reduce the space of the valve pocket that the guide sleeve occupied. Further, it is possible to reduce mechanical noise caused by the shaking of the needle and fluid noise caused by an excessively small fluid flow space in the valve chamber.

Furthermore, the guide sleeve is provided with a first hole section and a second hole section which are arranged in a stepped mode, the first hole section is located in the main body section, the second hole section is arranged in the end face and the thin-wall section of the first end in a penetrating mode, and the second hole section is used for guiding the valve needle in a matched mode. So set up, can guarantee the smooth and easy nature of needle removal and installation, also conveniently install other and needle complex part in the second hole section simultaneously.

Further, the length of the second hole section is between 1.5mm and 7mm, and the length of the thin-wall section is less than 6 mm. So set up, can enough guarantee the cooperation length of uide bushing and needle, also can reduce the space of the valve pocket that the uide bushing occupied, and then can reduce the mechanical noise and the fluid noise of the needle shake of electronic expansion valve during operation on the whole.

Furthermore, chamfers are arranged on the guide sleeve and are respectively positioned on the inner circumferential surfaces of two ends of the second hole section. The chamfer sets up, can play the effect of direction to the assembly of needle, makes things convenient for the installation of needle.

Further, the guide sleeve further comprises a fixing protrusion, the fixing protrusion is annularly arranged on the outer side of the main body section, the fixing protrusion is arranged close to the first end of the main body section, and the fixing protrusion is fixedly connected with the valve seat. So set up, can guarantee the area of contact between uide bushing and the disk seat, and then can guarantee the stability of uide bushing and disk seat assembly.

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 is a schematic diagram of an electronic expansion valve provided by the present invention;

FIG. 2 shows a partial enlarged view at A in FIG. 1;

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

FIG. 4 shows a dimensional schematic of a guide sleeve provided by the present invention;

fig. 5 shows a schematic structural diagram of the guide sleeve and the valve seat provided by the utility model.

Wherein the figures include the following reference numerals:

10. a valve seat; 101. a valve cavity; 102. mounting holes; 20. a valve port; 30. a guide sleeve; 301. a first end; 302. a second end; 303. a first bore section; 304. a second bore section; 31. a main body section; 32. a thin-walled section; 33. a fixed protrusion; 40. a valve needle; 50. a first connecting pipe.

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, an embodiment of the present invention provides an electronic expansion valve, which includes a valve seat 10, a valve port 20, a guide sleeve 30, and a valve needle 40. The valve seat 10 has a valve chamber 101 and a valve port 20, and the valve port 20 is disposed in communication with the valve chamber 101. The guide sleeve 30 is fixedly matched with the valve seat 10, the guide sleeve 30 is arranged opposite to the valve port 20, the guide sleeve 30 comprises a main body section 31 and a thin-wall section 32 which are sequentially connected along the axial direction, the main body section 31 is provided with a first end 301 and a second end 302 which are oppositely arranged, the thin-wall section 32 is connected with the first end 301, the end face of the first end 301 and the thin-wall section 32 are positioned in the valve cavity 101, the outer diameter of the thin-wall section 32 is smaller than that of the first end 301, and the outer diameter of one end, close to the main body section 31, of the thin-wall section 32 is larger than that of one end, far away from the main body section 31, of the thin-wall section 32. The valve needle 40 is movably disposed in the guide sleeve 30, the valve needle 40 partially penetrates the guide sleeve 30 and is located in the valve cavity 101, the valve needle 40 is used for controlling the opening and closing of the valve port 20, and the thin-wall section 32 can guide the valve needle 40.

By adopting the technical scheme provided by the present application, when the fluid flows into the valve cavity 101, the fluid contacts the valve needle 40 and has a certain impact force on the valve needle 40 and the guide sleeve 30. With the above arrangement, the height difference of the step structure formed between the end of the guide sleeve 30 close to the valve port 20 and the valve needle 40 can be reduced, and thus the turbulent flow generated by the fluid impacting the step structure can be reduced, and the fluid noise generated when the electronic expansion valve operates can be reduced. And. The thin-wall section 32 can enhance the guiding effect of the guide sleeve 30 on the valve needle 40, further reduce the shaking amplitude of the valve needle 40, and reduce the mechanical noise of the shaking of the valve needle 40 during the operation of the electronic expansion valve.

Preferably, the difference between the outer diameter of the thin wall section 32 and the inner diameter of the thin wall section 32 is between 0.15mm and 1.5 mm. If the difference between the outer diameter of the thin-wall section 32 and the inner diameter of the thin-wall section 32 is less than 0.15mm, the structural strength of the thin-wall section 32 is low, and the thin-wall section 32 is easily damaged and loses the guiding effect on the valve needle 40 under the long-time impact action of fluid; if the difference between the outer diameter of the thin-wall section 32 and the inner diameter of the thin-wall section 32 is greater than 1.5mm, on one hand, the height difference of the step structure formed by the thin-wall section 32 and the valve needle 40 is too large, and on the other hand, the space of the valve cavity 101 occupied by the thin-wall section 32 is also too large, so that fluid disturbance is caused, and fluid noise generated during the operation of the electronic expansion valve is increased. Therefore, in the embodiment, the difference between the outer diameter of the thin-wall section 32 and the inner diameter of the thin-wall section 32 is set to be 0.15mm to 1.5mm, so that the strength of the thin-wall section 32 can be ensured, and the mechanical noise and the fluid noise generated during the operation of the electronic expansion valve can be reduced. Specifically, the difference between the outer diameter of the thin-walled segment 32 and the inner diameter of the thin-walled segment 32 may be set to 0.15mm, 1mm, or 1.5 mm.

Further, in the direction from the thin-wall section 32 to the main body section 31, the thin-wall section 32 includes at least one of a tapered section and a straight section. By the arrangement, the guide sleeve 30 is suitable for electronic expansion valves with different structures, and the adaptability of the guide sleeve 30 is improved.

Wherein the thin wall section 32 may be provided as a single straight line segment. So set up, can make things convenient for the machine-shaping of uide bushing 30. The thin wall section 32 may also be provided as a single conical section to minimize fluid impact; the thin wall section 32 may also be provided as a combination of straight and tapered sections.

As shown in fig. 3 and 4, the outer diameter of the thin-walled segment 32 gradually increases in the direction from the thin-walled segment 32 to the main body segment 31. Wherein, the thin-wall section 32 can be set as a step section, and the thin-wall section 32 can also be set as a cone section and a step section which are connected with each other. In this embodiment, the thin-wall section 32 is a section of conical section, the inner diameter of the thin-wall section 32 is D1, the outer diameter of the end of the thin-wall section 32 far away from the main body section 31 is D2, and the outer diameter of the end of the thin-wall section 32 close to the main body section 31 is D3. The difference between D2 and D1 was 0.15mm, and the difference between D3 and D1 was 1.5 mm. With this arrangement, not only can the structural strength of the thin-walled segment 32 be ensured, but also the fluid noise generated by the height difference of the stepped structure formed between the end of the thin-walled segment 32 far from the main body segment 31 and the valve needle 40 can be reduced.

As shown in fig. 2, the electronic expansion valve further comprises a first connecting pipe 50, the first connecting pipe 50 is disposed on the valve seat 10, the first connecting pipe 50 is communicated with the valve chamber 101, and the axis of the first connecting pipe 50 is perpendicular to the axis of the valve needle 40. Wherein the radius of the first connecting pipe 50 is R, and the distance between the end surface of the first end 301 and the axis of the first connecting pipe 50 is between R-0.5mm and R +0.5 mm. When the distance between the end surface of the first end 301 and the axis of the first connecting pipe 50 is greater than R +0.5mm, the distance between the end of the thin-wall section 32 far away from the main body section 31 and the valve port 20 is relatively large, so that the valve needle 40 may shake relatively large, and mechanical noise may be generated during the operation of the electronic expansion valve; when the distance between the end surface of the first end 301 and the axis of the first connecting pipe 50 is smaller than R-0.5mm, the space of the thin-wall section 32 occupying the valve cavity 101 is too large, and a turbulent flow phenomenon may occur, thereby causing fluid noise when the electronic expansion valve works. Therefore, the above arrangement can reduce both the mechanical noise caused by the valve needle 40 shaking during the operation of the electronic expansion valve and the fluid noise during the operation of the electronic expansion valve.

Specifically, the distance between the end surface of the first end 301 and the axis of the first connecting pipe 50 is R. The arrangement is such that all the thin-walled sections 32 are located in the valve cavity 101 and bear the impact force from the fluid, ensuring the stability of the valve needle 40. Meanwhile, when the fluid enters the valve cavity 101 from the first connecting pipe 50, the fluid is prevented from directly impacting the first end 301, and thus disturbance to the fluid and fluid noise are reduced.

As shown in fig. 3 and 5, the guiding sleeve 30 has a first hole section 303 and a second hole section 304 which are arranged in a stepped manner, the first hole section 303 is located in the main body section 31, the second hole section 304 is arranged in the end surface of the first end 301 and the thin-wall section 32 in a penetrating manner, and the second hole section 304 is used for guiding in cooperation with the valve needle 40. Specifically, the aperture of the first bore section 303 is larger than that of the second bore section 304, so that the smoothness of the movement and installation process of the valve needle 40 can be ensured, and meanwhile, other components matched with the valve needle 40 can be conveniently installed in the second bore section 304.

Further, the length of the second hole section 304 is between 1.5mm and 7mm, and the length of the thin-wall section 32 is less than 6 mm. Wherein the length of the thin-wall section 32 is L1, and the length of the second hole section 304 is L2. The length of the second bore section 304 may be 1.5mm, 4mm or 7 mm. The length of the thin wall section 32 may be 1mm, 3mm or 6 mm. In this example, L1 was 5mm, and L2 was 6 mm. By the arrangement, the matching length of the guide sleeve 30 and the valve needle 40 can be ensured, the space of the valve cavity 101 occupied by the guide sleeve 30 can be reduced, and the mechanical noise and the fluid noise of the valve needle shake during the operation of the electronic expansion valve can be reduced on the whole.

Further, chamfers are provided on the guide sleeve 30, and the chamfers are respectively located on the inner circumferential surfaces of both ends of the second hole section 304. The chamfer is arranged, so that the valve needle 40 can be assembled in a guiding manner, and the valve needle 40 is convenient to mount.

As shown in fig. 3 and 5, the guide sleeve 30 further includes a fixing protrusion 33, the fixing protrusion 33 is annularly disposed on the outer side of the main body section 31, the fixing protrusion 33 is disposed near the first end 301 of the main body section 31, and the fixing protrusion 33 is fixedly connected to the valve seat 10. Specifically, the valve seat 10 is provided with a mounting hole 102, the mounting hole 102 is communicated with the valve cavity 101 and is arranged opposite to the valve port 20, the fixing protrusion 33 is matched with the mounting hole 102, and the fixing protrusion 33 is embedded into the mounting hole 102 and is fixedly matched with the valve seat 10. The cooperation of the fixing protrusion 33 and the mounting hole 102 can ensure the contact area between the guide sleeve 30 and the valve seat 10, and further can ensure the stability of the assembly of the guide sleeve 30 and the valve seat 10.

Through the technical scheme provided by the application, the thin-wall section 32 can reduce the space of the valve cavity 101 occupied by the guide sleeve 30, and can also reduce the height difference of the step structure formed between the guide sleeve 30 and the valve needle 40, so that the turbulence phenomenon caused by the disturbance of the guide sleeve 30 on fluid can be reduced, and the noise generated during the operation of the electronic expansion valve can be reduced.

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 valve cavity (101), the valve seat (10) is also provided with a valve port (20), and the valve port (20) is communicated with the valve cavity (101);

the guide sleeve (30) is fixedly matched with the valve seat (10), the guide sleeve (30) is arranged opposite to the valve port (20), the guide sleeve (30) comprises a main body section (31) and a thin-wall section (32) which are sequentially connected along the axial direction, the main body section (31) is provided with a first end (301) and a second end (302) which are arranged oppositely, the thin-wall section (32) is connected with the first end (301), the end surface of the first end (301) and the thin-wall section (32) are positioned in the valve cavity (101), the outer diameter of the thin-wall section (32) is smaller than that of the first end (301), and the outer diameter of one end, close to the main body section (31), of the thin-wall section (32) is larger than that of one end, far away from the main body section (31), of the thin-wall section (32);

a valve needle (40) movably arranged in the guide sleeve (30), the valve needle (40) partially penetrates through the guide sleeve (30) and is positioned in the valve cavity (101), the valve needle (40) is used for controlling the opening and closing of the valve port (20), and the thin-wall section (32) can guide the valve needle (40).

2. An electronic expansion valve according to claim 1, wherein the difference between the outer diameter of the thin-walled section (32) and the inner diameter of the thin-walled section (32) is between 0.15mm and 1.5 mm.

3. An electronic expansion valve according to claim 1, wherein the thin-walled section (32) comprises at least one of a conical section and a straight section in the direction from the thin-walled section (32) to the main body section (31).

4. An electronic expansion valve according to any of claims 1-3, wherein the outer diameter of the thin-walled section (32) is gradually increasing in the direction from the thin-walled section (32) to the main body section (31).

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

a first connecting pipe (50) arranged on the valve seat (10), wherein the first connecting pipe (50) is communicated with the valve cavity (101), and the axis of the first connecting pipe (50) is vertical to the axis of the valve needle (40);

wherein the radius of the first connecting pipe (50) is R, and the distance between the end surface of the first end (301) and the axis of the first connecting pipe (50) is between R-0.5mm and R +0.5 mm.

6. An electronic expansion valve according to claim 5, wherein the distance between the end surface of the first end (301) and the axis of the first connection tube (50) is R.

7. An electronic expansion valve according to claim 1, wherein the guide sleeve (30) has a first hole section (303) and a second hole section (304) arranged in a step, the first hole section (303) is located in the main body section (31), the second hole section (304) is arranged through the end face of the first end (301) and the thin-walled section (32), and the second hole section (304) is used for guiding in cooperation with the valve needle (40).

8. An electronic expansion valve according to claim 7, wherein the length of the second bore section (304) is between 1.5mm and 7mm, and the length of the thin wall section (32) is less than 6 mm.

9. An electronic expansion valve according to claim 7, wherein the guide sleeve (30) is provided with chamfers, which are located on the inner circumferential surfaces of both ends of the second bore section (304), respectively.

10. An electronic expansion valve according to claim 1, wherein the guide sleeve (30) further comprises a fixing protrusion (33), the fixing protrusion (33) being annularly arranged outside the main body section (31), the fixing protrusion (33) being arranged near the first end (301) of the main body section (31), the fixing protrusion (33) being fixedly connected to the valve seat (10).