CN114251462A

CN114251462A - Electronic expansion valve

Info

Publication number: CN114251462A
Application number: CN202011014965.8A
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: 2020-09-24
Filing date: 2020-09-24
Publication date: 2022-03-29

Abstract

The present application relates to an electronic expansion valve. The electronic expansion valve comprises a valve body and a noise reduction structure, wherein the valve body is provided with a valve port and a shunt hole communicated with the valve port, and the noise reduction structure is arranged in the shunt hole; the noise reduction structure comprises a drainage part, a flow distribution part and a plurality of flow distribution sheets, wherein the flow distribution part is arranged in a flow distribution hole, the plurality of flow distribution sheets are arranged in the circumferential direction of the flow distribution part at intervals, and a flow distribution channel is formed between every two adjacent flow distribution sheets; the drainage portion is installed on the reposition of redundant personnel portion and is close to the valve port setting, and the interval sets up between drainage portion and the reposition of redundant personnel hole, along the axis direction of valve port, and from valve port to reposition of redundant personnel portion direction, the external diameter of drainage portion increases progressively in proper order. The application has the advantages that: the flow guiding and noise reduction effects of the electronic expansion valve are improved.

Description

Electronic expansion valve

Technical Field

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

Background

The electronic expansion valve is a key element in refrigeration and heating equipment, and the flow of gas/liquid is regulated by controlling the opening of the electronic expansion valve, so that the system function is realized and the aim of accurate control is fulfilled.

In the existing electronic expansion valve, under the action of electrifying a coil, a rotor rotates a lead screw with a hole to rotate, and under the action of a thread side effect between the lead screw and a nut, the lead screw rotates and moves up and down, so that a valve core is driven to be close to or far away from a valve port, and the flow of fluid is adjusted.

However, since there is no flow guiding and noise reducing structure at the joint of the valve port and the outlet pipe, the fluid will impact the inner wall of the outlet pipe after entering at high speed, resulting in uneven pressure distribution, increased turbulence intensity, valve vibration and noise generation.

Disclosure of Invention

In view of the above, it is desirable to provide an electronic expansion valve capable of reducing noise and guiding flow.

In order to solve the technical problem, the application provides the following technical scheme:

the application relates to an electronic expansion valve, which comprises a valve body and a noise reduction structure, wherein the valve body is provided with a valve port and a shunting hole communicated with the valve port, and the noise reduction structure is arranged in the shunting hole;

the noise reduction structure comprises a drainage part, a flow distribution part and a plurality of flow distribution sheets, wherein the flow distribution part is arranged in the flow distribution hole, the flow distribution sheets are arranged in the circumferential direction of the flow distribution part at intervals, and a flow distribution channel is formed between every two adjacent flow distribution sheets;

the drainage part is arranged on the flow dividing part and is close to the valve port, the drainage part and the flow dividing hole are arranged at intervals, and the outer diameter of the drainage part is sequentially increased along the axial direction of the valve port and from the valve port to the flow dividing part.

In the application, along the axial direction of the valve port, and from the valve port to the flow dividing part direction (namely the flowing direction of the fluid medium), the outer diameter of the flow guiding part is sequentially increased, the small-diameter end can quickly disturb and redistribute the gas-liquid two-phase fluid medium which is distributed unevenly after the valve port is throttled, and the single-flow fluid medium is guided; meanwhile, the outer diameter of the drainage part is sequentially increased to play a role in buffering, so that in the process that fluid media flow through the circumferential direction of the outer wall of the drainage part, the pressure is slowly released, the speed is more stable and uniform, and the fluid media are uniformly distributed in the circumferential direction of the outer wall of the drainage part immediately so as to flow to the flow dividing part; simultaneously, combine polylith reposition of redundant personnel piece will originally the flowing medium separation of single-stranded into the stranded, the strong efflux of single-stranded promptly divide into the weak efflux of stranded, and the liquid core of weak efflux is less, can obtain abundant evaporation in the short time to reduce the sudden release of single-stranded fluid medium and produce the operating noise that the impact caused.

In one embodiment, the drainage portion and the flow dividing portion are integrally connected.

Due to the arrangement, the noise reduction structure is convenient to process; meanwhile, an independent part is avoided being provided independently, and the installation process and the cost are saved.

In one embodiment, the cross section of the drainage part is conical or semi-elliptical along the axial direction of the valve port.

By the arrangement, the fluid medium flows through the small-diameter end, the small-diameter end can quickly throttle the valve port and then distribute the non-uniform gas-liquid two-phase fluid medium to be disorderly redistributed, and the single-strand flowing medium is drained; meanwhile, the section of the drainage part is conical or semi-elliptical, so that the buffering effect can be achieved, the pressure is slowly released in the process that fluid media flow through the circumferential direction of the outer wall of the drainage part, the fluid media are uniformly distributed in the circumferential direction of the outer wall of the drainage part immediately, and the speed is more stable and uniform.

In one embodiment, the number of the drainage parts is two, and the large-diameter ends of the two drainage parts are respectively connected with the flow dividing part.

So set up, through setting up two drainage parts, can realize carrying out twice redistribution, cushioning effect and pressure and slowly released to fluid medium, further reduced fluid medium's noise.

In one embodiment, the plurality of the splitter plates are all cuboid, the number of the splitter plates is N, and N is more than or equal to 3.

So set up, polylith reposition of redundant personnel piece will be originally the flowing medium separation of single strand into the stranded, and the strong efflux of single strand divide into the weak efflux of stranded promptly, and the liquid core of weak efflux is less, can obtain abundant evaporation in the short time to reduce the sudden release of single strand fluid medium and produce the noise at work that the impact caused.

In one embodiment, the noise reduction structure is fixedly connected with the inner wall of the shunt hole in any one of welding, riveting, interference fit or necking mode.

So set up, can fall the structure of making an uproar and fix in the electronic expansion valve according to different demands, improve the effect of making an uproar that falls in the water conservancy diversion.

In one embodiment, the shunt hole and the valve body are arranged in an integrally machined structure or a split structure.

So set up, can design and process differently valve seat and reposition of redundant personnel hole according to different needs.

In one embodiment, in a radial direction of the flow dividing portion, a cross-sectional area of the flow dividing passage is not smaller than a cross-sectional area of the valve port.

By the arrangement, the fluid medium flowing into the flow dividing channel can completely satisfy the requirements of flowing and evaporating the fluid medium flowing out of the valve port, and the fluid medium is prevented from being intensively blocked at the valve port and slowly flowing.

In one embodiment, the electronic expansion valve further comprises an outlet pipe, the valve body is partially installed in the outlet pipe, the diversion hole is located in the valve body installed in the outlet pipe, and the diversion hole is communicated with the outlet pipe.

So set up, the fluid medium who flows through the structure of making an uproar that falls in the reposition of redundant personnel hole obtains abundant evaporation back in the short time, directly gets into in the outlet pipe to reduce the impact to outlet pipe inner wall production, reduce noise at work.

In one embodiment, the electronic expansion valve further comprises a valve core, the valve body has a valve cavity, one end of the valve core is located in the valve cavity, and the other end of the valve core extends into the valve port and is used for opening/closing the valve port.

So set up, the case can control the open/close of valve port to control fluid medium flow input volume.

Compared with the prior art, the electronic expansion valve provided by the application has the advantages that the outer diameter of the drainage part is sequentially increased in the axial direction of the valve port and in the direction from the valve port to the flow dividing part (namely the flow direction of the fluid medium), the small-diameter end can quickly break up and redistribute the gas-liquid two-phase fluid medium which is distributed unevenly after the valve port is throttled, and the drainage effect is realized on a single-strand flow medium; meanwhile, the outer diameter of the drainage part is sequentially increased to play a role in buffering, so that in the process that fluid media flow through the circumferential direction of the outer wall of the drainage part, the pressure is slowly released, the speed is more stable and uniform, and the fluid media are uniformly distributed in the circumferential direction of the outer wall of the drainage part immediately so as to flow to the flow dividing part; simultaneously, combine polylith reposition of redundant personnel piece will originally the flowing medium separation of single-stranded into the stranded, the strong efflux of single-stranded promptly divide into the weak efflux of stranded, and the liquid core of weak efflux is less, can obtain abundant evaporation in the short time to reduce the sudden release of single-stranded fluid medium and produce the operating noise that the impact caused.

Drawings

Fig. 1 is a schematic structural diagram of an electronic expansion valve provided in the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a schematic view of a noise reduction structure in an embodiment provided herein;

FIG. 4 is a schematic view of a noise reduction structure in another embodiment provided herein;

FIG. 5 is a schematic view of a noise reduction structure in another embodiment provided herein;

fig. 6 is a schematic diagram of a noise reduction structure in another embodiment provided in the present application.

In the figure, 100, electronic expansion valves; 10. a valve body; 11. a valve port; 12. a shunt hole; 13. a valve cavity; 14. a through hole; 20. a noise reduction structure; 21. a drainage part; 22. a flow dividing section; 23. a splitter plate; 24. a flow dividing channel; 30. a valve seat; 31. a valve seat cavity; 40. a valve core; 50. a valve housing; 51. a valve housing cavity; 52. a rotor; 53. a valve stem; 54. a nut; 55. an elastic member; 60. an inlet tube; 70. an outlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, 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 invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-6, the present invention provides an electronic expansion valve 100, and the electronic expansion valve 100 is applied to an air conditioner, a refrigerated container for a ship, a heat pump machine, etc. for implementing precise control and adjustment of refrigerant in the device.

Referring to fig. 1-2, fig. 1 is a schematic view of an electronic expansion valve 100 according to an embodiment of the invention, fig. 2 is a partially enlarged view of a portion a in fig. 1, and arrows indicate flow directions of several flows of flowing media; specifically, the electronic expansion valve 100 includes a valve body 10 and a noise reduction structure 20, the valve body 10 has a valve port 11 and a flow dividing hole 12 communicated with the valve port 11, and the noise reduction structure 20 is installed in the flow dividing hole 12; the noise reduction structure 20 comprises a drainage part 21, a shunt part 22 and a plurality of shunt pieces 23, the shunt part 22 is installed in the shunt hole 12, the shunt pieces 23 are arranged in the circumferential direction of the shunt part 22 at intervals, an original single-stranded flowing medium can be separated into a plurality of strands, namely, single-stranded strong jet flow is divided into a plurality of strands of weak jet flows, a shunt channel 24 is formed between every two adjacent shunt pieces 23, and the separated plurality of strands of weak jet flows flow out from the corresponding shunt channel 24;

the drainage part 21 is arranged on the flow splitting part 22 and is close to the valve port 11, and the drainage part 21 and the flow splitting hole 12 are arranged at intervals so as to facilitate the circulation of fluid media; along the axial direction of valve port 11, and from valve port 11 to reposition of redundant personnel portion 22 direction, the external diameter of drainage portion 21 increases progressively in proper order, can play drainage effect and cushioning effect to the single-stranded flowing medium.

Preferably, the interval between the drainage part 21 and the diversion hole 12 is constant or gradually changed.

It can be understood that, by providing the noise reduction structure 20, the fluid medium flows to the flow dividing portion 22 through the flow guiding portion 21 (i.e., the flow direction of the fluid medium), thereby reducing the operating noise generated by the impact of the fluid medium; along the axial direction of the valve port 11 and from the valve port 11 to the shunt part 22, the outer diameter of the drainage part 21 is sequentially increased, the fluid medium flows through the small-diameter end, the small-diameter end can quickly distribute the gas-liquid two-phase fluid medium which is not uniformly distributed after the valve port 11 is throttled, the fluid medium is disturbed and redistributed, and the drainage effect is realized on the single-strand flowing medium;

meanwhile, the outer diameter of the drainage part 21 is sequentially increased to play a role in buffering, so that in the process that fluid media flow through the circumferential direction of the outer wall of the drainage part 21, the pressure is slowly released, the speed is more stable and uniform, and the fluid media are uniformly distributed in the circumferential direction of the outer wall of the drainage part 21, so that the fluid media flow to the flow dividing part 22;

simultaneously, combine polylith reposition of redundant personnel piece 23 to separate into the stranded flow medium originally, the strong efflux of individual strand divide into the weak efflux of stranded promptly, and the liquid core of weak efflux is less, can obtain abundant evaporation in the short time to reduce the sudden release of individual strand fluid medium and produce the operating noise that the impact caused.

The experimental comparison shows that when the noise reduction structure 20 is not installed in the prior art, the detected noise is 34.3dB (A), the detected noise is 33.1dB (A), and after the noise reduction structure 20 is installed in the application, the detected noise is 32.0dB (A), so that the noise is reduced by 6.7% compared with the noise reduction structure 20 which is not installed in the prior art; compared with the common U-shaped silencing sheet, the noise is reduced by 3.32 percent.

In this application, the noise reduction structure 20 can be fixed to the noise reduction structure 20 in the electronic expansion valve 100 according to actual requirements through welding, riveting, interference fit or mode fixed connection such as throat, and the effect of making an uproar falls in the water conservancy diversion can further be improved. Meanwhile, the flow dividing hole 12 and the valve body 10 may be integrally formed or separated, and the valve seat 30 and the flow dividing hole 12 may be designed and processed differently according to different requirements.

In the application, the drainage part 21 and the flow dividing part 22 are integrally connected, so that the noise reduction structure 20 is convenient to process; meanwhile, an independent part is avoided being provided independently, and the installation process and the cost are saved. Of course, in other embodiments, the drainage portion 21 and the flow dividing portion 22 may be provided in a split structure.

Preferably, as shown in fig. 3 and 4, along the axial direction of the valve port 11, the cross section of the drainage portion 21 is conical or semi-elliptical, and the small-diameter end is disposed close to the valve port 11, so that the fluid medium flows through the small-diameter end first, and the small-diameter end quickly conducts turbulent redistribution on the gas-liquid two-phase fluid medium which is distributed unevenly after throttling the valve port 11, thereby performing drainage on a single-flow fluid medium; meanwhile, the section of the drainage part 21 is conical or semi-elliptical, so that the buffering effect can be achieved, the pressure is slowly released in the process that fluid media flow through the circumferential direction of the outer wall of the drainage part 21, the speed is more stable and uniform, and the fluid media are uniformly distributed in the circumferential direction of the outer wall of the drainage part 21 and flow to the flow dividing part 22.

As shown in fig. 5 and 6, in the present application, the number of the drainage portions 21 is two, the two drainage portions 21 are respectively located at two sides of the flow dividing portion 22, and the large diameter ends of the two drainage portions 21 are respectively connected to the flow dividing portion 22, so that the fluid medium flows from one drainage portion 21 to the other drainage portion 21 through the flow dividing portion 22, thereby achieving the effects of redistributing the fluid medium twice, buffering, slowly releasing the pressure, and further reducing the noise of the fluid medium.

As shown in FIGS. 3-6, the splitter plates 23 are rectangular, and the number of the splitter plates is N, wherein N is greater than or equal to 3. The polylith flow distribution sheet 23 will be originally single-stranded flow medium and separate into the stranded, and single-stranded strong efflux promptly divides into the weak efflux of stranded, because the liquid phase core of weak efflux is less, can obtain abundant evaporation in the short time to can reduce the sudden release of single-stranded fluid medium and produce the operating noise that the impact caused.

Of course, in other embodiments, the splitter 23 may be configured to have the same function, such as a semi-cylinder; the number of the shunting pieces 23 may also be other numbers, such as four, five or six.

Further, in the radial direction of the flow dividing portion 22, the cross-sectional area of the flow dividing passage 24 is not smaller than the cross-sectional area of the valve port 11; the fluid medium flowing into the branch passage 24 can completely satisfy the flowing and evaporation of the fluid medium flowing out from the valve port 11, and the fluid medium is prevented from being intensively blocked at the valve port 11 and slowly flowing.

As shown in fig. 1, the electronic expansion valve 100 further includes a valve seat 30 and a valve core 40, the valve body 10 has a valve cavity 13, the valve seat 30 is installed in the valve cavity 13, and the valve seat 30 is opened with a valve seat 30 cavity penetrating through two ends of the valve seat 30 along the axial direction of the valve body 10; the valve core 40 has one end positioned in the valve seat 30 cavity and the other end extending from the valve seat 30 cavity and positioned in the valve cavity 13 and can extend into the valve port 11 for opening/closing the valve port 11, thereby controlling the fluid medium flow input amount.

The electronic expansion valve 100 further comprises a valve housing 50, a nut 54 and an elastic member 55, wherein the valve housing 50 is fixedly connected with the valve body 10, and the valve housing 50 has a valve housing 50 cavity; the valve housing 50 is provided with a rotor 52 and a valve rod 53 rotating with the rotor 52 in the cavity, a nut 54 is arranged in the valve housing 50, and the nut 54 is matched with the valve rod 53 through a thread side effect; one end of the elastic piece 55 abuts against the valve core 40, and the other end abuts against the valve rod 53; when the electronic expansion valve 100 works, under the action of energization of the coil, the rotor 52 rotates and drives the valve rod 53 to rotate, and through a thread side effect between the valve body 10 and the nut 54, the valve rod 53 can perform axial lifting motion while rotating, so as to drive the valve needle to open or close the valve port 11 to regulate the flow rate of the fluid medium.

The electronic expansion valve 100 further comprises an inlet pipe 60 and an outlet pipe 70, a through hole 14 is further formed in the valve body 10, and the through hole 14 is respectively communicated with the inlet pipe 60 and the valve port 11; the valve body 10 is partially installed in the outlet pipe 70, the diversion hole 12 is positioned in the valve body 10 installed in the outlet pipe 70, and the diversion hole 12 is communicated with the outlet pipe 70; the fluid medium can enter the through-hole 14 through the inlet pipe 60, and then flow into the orifice through the valve port 11, and flow toward the outlet pipe 70.

When the valve port 11 of the electronic expansion valve 100 is opened, the fluid medium flows in from the inlet pipe 60 and flows to the valve port 11 through the through hole 14, the distribution of the liquid two-phase fluid medium throttled by the valve port 11 is uneven, the fluid medium flows through the small-diameter end firstly, the small-diameter end can quickly break up and redistribute the gas-liquid two-phase fluid medium throttled by the valve port 11 and then unevenly distributed, and the drainage effect is realized on single-strand flowing media; meanwhile, the outer diameter of the drainage part 21 is sequentially increased to play a role in buffering, so that in the process that the fluid medium flows through the circumferential direction of the outer wall of the drainage part 21, the pressure is slowly released, the speed is more stable and uniform, and the fluid medium is uniformly distributed in the circumferential direction of the outer wall of the drainage part 21 so as to flow to the flow dividing part 22;

the polylith reposition of redundant personnel piece 23 of reposition of redundant personnel portion 22 will be originally single-stranded flow medium separation into the stranded, and single strand strong efflux divide into the weak efflux of stranded promptly, and the liquid core of weak efflux is less, can obtain abundant evaporation in the short time, flows to outlet pipe 70 again to reduce the impact that single-stranded fluid medium suddenly released and produced outlet pipe 70, reduce noise at work.

The features of the above embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above embodiments are not described, but should be construed as being within the scope of the present specification as long as there is no contradiction between the combinations of the features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. An electronic expansion valve comprises a valve body and a noise reduction structure, wherein the valve body is provided with a valve port and a shunting hole communicated with the valve port, and the noise reduction structure is arranged in the shunting hole;

the noise reduction structure is characterized by comprising a drainage part, a flow distribution part and a plurality of flow distribution sheets, wherein the flow distribution part is arranged in the flow distribution hole, the flow distribution sheets are arranged in the circumferential direction of the flow distribution part at intervals, and a flow distribution channel is formed between every two adjacent flow distribution sheets;

2. The electronic expansion valve of claim 1, wherein the flow-directing portion is integrally connected to the flow-splitting portion.

3. The electronic expansion valve of claim 1, wherein the cross-section of the flow guide portion along the axis of the valve port is tapered or semi-elliptical.

4. The electronic expansion valve according to claim 3, wherein the number of the flow-guiding portions is two, the two flow-guiding portions are respectively located at two sides of the flow-dividing portion, and the large-diameter ends of the two flow-guiding portions are respectively connected to the flow-dividing portion.

5. The electronic expansion valve according to claim 1, wherein the plurality of splitter plates are rectangular, and the number of splitter plates is N, N being greater than or equal to 3.

6. The electronic expansion valve according to claim 1, wherein the noise reduction structure is fixedly connected to the inner wall of the shunt hole by any one of welding, riveting, interference fit or necking.

7. The electronic expansion valve according to claim 1, wherein the branch hole and the valve body are provided in an integrally formed structure or a separate structure.

8. The electronic expansion valve according to claim 1, wherein a cross-sectional area of the branch passage is not smaller than a cross-sectional area of the valve port in a radial direction of the branch portion.

9. The electronic expansion valve according to claim 1, further comprising an outlet pipe, wherein the valve body is partially mounted in the outlet pipe, wherein the branch orifice is located in the valve body mounted in the outlet pipe, and wherein the branch orifice communicates with the outlet pipe.

10. The electronic expansion valve according to claim 1, further comprising a valve core, wherein the valve body has a valve cavity, and one end of the valve core is located in the valve cavity, and the other end of the valve core extends into the valve port for opening/closing the valve port.