Electronic expansion valve

Abstract

According to the electronic expansion valve, the flow disturbing part is additionally arranged on the valve element, the flow disturbing part is located below the sealing matching part, the flow disturbing part is arranged in the circumferential direction of the sealing face part and protrudes and / or sinks from the sealing face part, and due to the existence of the flow disturbing part, when fluid passes through a flow channel, the flow speeds of all points in the circumferential direction can be obviously different; the fluid flowing state is improved, and the situation that vortex shedding frequency is concentrated on single frequency due to the fact that the flowing speeds of all points in the circumferential direction are relatively consistent originally, and then howling noise is caused is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration control, in particular to an electronic expansion valve. BACKGROUND

[0002] The electronic expansion valve is commonly used in refrigeration systems, including a valve body provided with a valve port and a valve needle, the valve needle can approach or move away from the valve port to adjust the refrigerant flow, and the refrigerant passing through the valve port is prone to generate vortex and then produce whistling noise, which affects the customer experience. SUMMARY

[0003] The present application aims to provide an electronic expansion valve which can improve the fluid flow state and relatively reduce the whistling.

[0004] The electronic expansion valve provided by the present application includes a valve port part provided with a valve port and a valve core, the valve core can approach or move away from the valve port, the valve core includes a sealing surface part and a turbulence part, the sealing surface part can be in abutment with the valve port part to form a sealing fit part, the turbulence part is located below the sealing fit part, and the turbulence part is arranged circumferentially along the sealing surface part and protrudes and / or is recessed from the sealing surface part.

[0005] The electronic expansion valve provided by the present application has a turbulence part added to the valve core, and the turbulence part is located below the sealing fit part, the turbulence part is arranged circumferentially along the sealing surface part and protrudes and / or is recessed from the sealing surface part, the flow velocity of each point in the circumferential direction of the fluid passing through the flow passage will have a significant difference due to the existence of the turbulence part, the fluid flow state is improved, the vortex shedding frequency is concentrated on a single frequency due to the relative consistency of the flow velocity of each point in the circumferential direction, and the whistling noise is thus avoided. BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 The overall structure of the electronic expansion valve provided by the present application in the open valve state is shown in the cross-sectional view;

[0007] Figure 2 The overall structure of the electronic expansion valve provided by the present application in the closed valve state is shown in the cross-sectional view;

[0008] Figure 3 The valve core structure of the electronic expansion valve provided by the first embodiment of the present application is shown in the schematic view;

[0009] Figure 4 The valve core structure of the electronic expansion valve provided by the second embodiment of the present application is shown in the schematic view;

[0010] Figure 5 The valve core structure of the electronic expansion valve provided by the third embodiment of the present application is shown in the schematic view;

[0011] Figure 6 Fig. 4 is a schematic view of a valve core structure of an electronic expansion valve according to a fourth embodiment of the present application;

[0012] Figure 7 Fig. 5 is a schematic view of a valve core structure of an electronic expansion valve according to a fifth embodiment of the present application;

[0013] Figure 8 Fig. 6 is a schematic view of a valve core structure of an electronic expansion valve according to a sixth embodiment of the present application BRIEF DESCRIPTION OF DRAWINGS

[0015] Valve seat 10, valve cavity 10A; valve core seat 11, valve port portion 111, valve port 111A, valve port hole 111B, through hole 112; valve core 12, large diameter portion 121, medium diameter portion 122, adjustment portion 123, sealing surface portion 1231, end surface 1232, first end portion 123a, second end portion 123b; turbulence portion 11A, first connecting pipe 100, second connecting pipe 200 DETAILED DESCRIPTION

[0016] In order to make the skilled in the art better understand the technical solutions provided by the present application, the technical solutions of the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be noted that the electronic expansion valve structure provided by the present application is mainly designed to improve the valve core structure, and other structures such as valve port portion, valve stem, nut, etc. can be adjusted adaptively according to the system occasion.

[0017] First embodiment

[0018] Please refer to Figure 1 , Figure 2 in combination with Figure 3 It is shown that the electronic expansion valve 1 comprises a valve seat 10, a first connecting pipe 100, i.e. a horizontal connecting pipe, a second connecting pipe 200, i.e. a vertical connecting pipe, a valve core seat 11 and a valve core 12. The valve core seat 11 is fixedly connected with the valve seat 1, and the valve core seat 11 and the valve seat 10 substantially define a valve cavity 10A. It should be noted that the substantially defining here means that the valve cavity 10A is formed by at least the valve core seat and the valve seat. The valve core seat 11 comprises a valve port portion 111 provided with a valve port 111A, and the valve port portion 111 is provided with a valve port hole 111B. The valve core seat 11 is also provided with a through hole 112. The valve core 12 can approach or move away from the valve port 111A to adjust the flow of refrigerant. It should be noted that the electronic expansion valve provided with the valve core seat is only one specific embodiment of the present application. In specific application occasions, the valve seat 10 can also be provided as an integral structure, the valve port portion can be directly formed on the valve seat 10, or the valve port portion can also be provided as a separate element and fixedly connected with the valve seat 10. The present application is described by taking the valve core seat provided with the valve port portion as an example for convenience of description.

[0019] The valve core 12 includes a large diameter part 121, a medium diameter part 122, and a regulating part 123 in a conical structure, the medium diameter part 122 is located between the large diameter part 121 and the regulating part 123, the regulating part 123 includes a sealing surface part 1231 and an end surface 1232 located below the sealing surface part 1231, the regulating part 123 includes a first end part 123a and a second end part 123b, the cross-sectional area of the second end part 123b close to the medium diameter part 122 is larger than that of the first end part 123a away from the medium diameter part 1122, the sealing surface part 1231 can abut or be away from the valve port 111A, when the electronic expansion valve is in the open valve state, the regulating part 123 is away from the valve port 111A; when the electronic expansion valve is in the closed valve state, the regulating part 123 abuts against the valve port part 111, that is, the sealing surface part 1231 abuts against the valve port part 111 to form a sealing fit part B, the regulating part 123 is also provided with a spoiler part, the spoiler part is located below the sealing fit part B, the spoiler part is arranged close to the end surface 1232 and along the circumference of the sealing surface part 1231, in the embodiment, the spoiler part 11A is substantially in a circular recess structure, the spoiler part 11A is recessed inward from the surface of the sealing surface part 1231, a plurality of spoiler parts 11A are uniformly and spacedly arranged along the circumference of the sealing surface part, and one side of the circular recess is open through the end surface 1232;

[0020] The actuation principle is stated as follows: after the refrigerant enters the valve cavity 10A from the first connecting pipe 100, it enters the valve port 111A through the through hole 112, and after being guided by the conical surface part of the original regular-shaped valve needle, the refrigerant flow rate of each point in the cross section of the valve port hole 111B in the circumferential direction is relatively consistent, which easily causes the vortex shedding frequency to concentrate on a single frequency, thereby causing obvious single-frequency howling noise. By arranging the spoiler part below the regulating part and the spoiler part being located below the sealing fit part B, the flow rate of each point in the circumferential direction of the valve port hole 111B will be significantly different when the refrigerant flows through this position due to the existence of the spoiler part. By additionally arranging the spoiler part below the regulating part 123 in a conical structure of the valve core, the refrigerant flow state is improved, the vortex shedding frequency is inconsistent, the single-frequency howling noise is greatly improved, and the noise can be relatively reduced to improve the customer experience.

[0021] Second embodiment

[0022] Reference is made below Figure 4 In combination Figure 1 , Figure 2The second embodiment provided by the application is different from the first embodiment in the structure of the spoiler. The spoiler 12A of the second embodiment is in a strip structure and is recessed inward from the surface of the sealing surface portion 1231. The spoilers 12A are uniformly spaced along the circumference of the sealing surface portion. The spoilers 12A are arranged in an inclined manner and are arranged in a clockwise or counterclockwise direction along the circumference of the sealing surface portion. One side of the spoiler 12A is open through the end surface 1232. In order to achieve a better noise reduction effect, the noise reduction portion 12A can be provided in a diagonal equal-depth groove structure. The same technical effect of the application can be achieved. The related application scenarios and effects have been specifically described in the first embodiment, and will not be repeated here.

[0023] Third embodiment

[0024] The third embodiment provided by the application is described below in combination with Figure 5 The third embodiment provided by the application is described below in combination with Figure 1 , Figure 2 The third embodiment provided by the application is different from the second embodiment in that the spoiler 13A of the third embodiment is also in a strip structure. The spoiler 13A is recessed inward from the surface of the sealing surface portion 1231. The spoilers 13A are uniformly spaced along the circumference of the sealing surface portion. One side of the spoiler 13A is open through the end surface 1232. In order to achieve a better noise reduction effect, the noise reduction portion 12A can be provided in a straight equal-depth groove structure. The same technical effect of the application can be achieved. The related application scenarios and effects have been specifically described in the first embodiment, and will not be repeated here.

[0025] Fourth embodiment

[0026] The fourth embodiment provided by the application is described below in combination with Figure 6 The fourth embodiment provided by the application is described below in combination with Figure 1 The fourth embodiment provided by the application is described below in combination with Figure 2 The fourth embodiment provided by the application is described below in combination with The fourth embodiment provided by the application is different from the first embodiment in that the spoiler 14A of the fourth embodiment is in a spiral structure and is recessed inward from the surface of the sealing surface portion 1231. The spoiler 14A is arranged in a spiral upward manner from the end surface 1232 to the side of the adjusting portion 123 away from the valve port portion 111. The adjusting portion 14A can also be provided in a spiral equal-depth groove structure. The same technical effect of the application can be achieved. The related application scenarios and effects have been specifically described in the first embodiment, and will not be repeated here.

[0027] Fifth embodiment

[0028] The fifth embodiment provided by the application is described below in combination with Figure 7 The fifth embodiment provided by the application is described below in combination with Figure 1 The fifth embodiment provided by the application is described below in combination with Figure 2To state the fifth embodiment provided by the present application, the spoiler 15A is in a strip-shaped structure and protrudes from the surface of the sealing surface part 1231, the spoilers 15A are uniformly spaced along the circumference of the sealing surface part, the spoilers 15A are arranged in an inclined manner and arranged along the circumferential direction of the sealing surface part in a clockwise or counterclockwise direction, and the lower edge of the strip-shaped protruding spoiler 15A is at least partially tangent to the edge of the end surface 1232. The technical effects of the present application can also be achieved, and the related application scenarios and effects have been described in detail in the first embodiment, which will not be repeated here.

[0029] Sixth implementation

[0030] The following refers to Figure 8 In combination Figure 1 , Figure 2 To state the sixth embodiment provided by the present application, the spoiler 16A is in a spherical structure and protrudes from the surface of the sealing surface part 1231, and a plurality of spoilers 16A are uniformly spaced along the circumference of the sealing surface part 1231. The edge of the spoiler 16A in a spherical structure is at least partially tangent to the end surface 1232. The technical effects of the present application can also be achieved, and the related application scenarios and effects have been described in detail in the first embodiment, which will not be repeated here.

[0031] It should be noted that the form of the spoiler can be changed in many ways, as long as the spoiler is located below the sealing fitting part and is arranged along the circumference of the sealing surface part. The spoiler can be protruding from the sealing surface part or recessed from the surface of the sealing surface part. There can be both protrusions and recesses or other special shapes. The specific form of the spoiler is not limited here.

[0032] The electronic expansion valve provided by the present application comprises a valve port part provided with a valve port and a valve core. The valve core can approach or move away from the valve port. The valve core comprises a sealing surface part and a spoiler. The sealing surface part can abut the valve port part to form a sealing fitting part. The spoiler is located below the sealing fitting part. The spoiler is arranged along the circumference of the sealing surface part and protrudes and / or recesses from the sealing surface part.

[0033] The electronic expansion valve provided by the present application comprises a valve port part provided with a valve port and a valve core. The valve core can approach or move away from the valve port. The valve core comprises a sealing surface part and a spoiler. The sealing surface part can abut the valve port part to form a sealing fitting part. The spoiler is located below the sealing fitting part. The spoiler is arranged along the circumference of the sealing surface part and protrudes and / or recesses from the sealing surface part.

[0034] It should be noted that the above, below, left, right and other orientation terms mentioned herein are based on the drawings as a reference, introduced for ease of description; and the "first", "second" and other ordinal terms in the component name are also introduced for ease of description, and do not mean any order of the components, and in addition, since the functions of some parts of the components provided by the above embodiments are the same, the specification adopts a unified naming method for these parts. The electronic expansion valve provided by the related technical solutions has been described in detail, and the specific embodiments are applied in this paper. The above embodiment is only used to help understand the method and its core idea, and does not limit the invention in any form.

Claims

1. An electronic expansion valve characterized by, The valve core includes a valve port part provided with a valve port and a valve core, which can approach or move away from the valve port, the valve core includes a sealing surface part and a spoiler part, the sealing surface part can form a sealing fitting part with the valve port part, and the spoiler part is located below the sealing fitting part, the spoiler part is arranged along the circumference of the sealing surface part and protrudes and / or is recessed from the sealing surface part.

2. The electronic expansion valve according to claim 1, characterized in that The valve core includes a large diameter part, a medium diameter part, and an adjusting part, the medium diameter part is located between the large diameter part and the adjusting part, the sealing surface part is arranged on the adjusting part, and the adjusting part is provided with an end face, and the spoiler part is arranged close to the end face.

3. The electronic expansion valve according to claim 2, wherein The spoiler part is recessed inward from the sealing surface part and is arranged along the circumference of the sealing surface part, and one side of the spoiler part is open through the end face.

4. The electronic expansion valve according to claim 3, wherein The spoiler part is in a strip structure, a plurality of the spoiler parts are designed as diagonal equal-depth grooves and are arranged clockwise or counterclockwise along the circumference of the sealing surface part.

5. The electronic expansion valve according to claim 3, wherein The spoiler part is in a strip structure, a plurality of the spoiler parts are designed as straight equal-depth grooves and are arranged along the circumference of the sealing surface part.

6. The electronic expansion valve according to claim 3, wherein The spoiler part is in a circular recess structure, and one side of the circular recess structure is open through the end face.

7. The electronic expansion valve according to claim 2, wherein The spoiler part is recessed inward from the sealing surface part, and the spoiler part is arranged spirally upward from the end face to the side of the adjusting part away from the valve port part.

8. The electronic expansion valve according to claim 2, wherein The spoiler part protrudes from the surface of the sealing surface part and is arranged along the circumference of the sealing surface part.

9. The electronic expansion valve according to claim 7, wherein The spoiler part is in a spherical or strip structure, and the edge of the spoiler part is at least partially tangent to the edge of the end face.

10. Electronic expansion valve according to any of claims 1-8, characterized in that The valve core includes a valve seat, a valve core seat fixedly connected with the valve seat, the valve core seat is provided with the valve port part, the valve core can approach or move away from the valve port, the valve core seat is provided with a valve port hole, in the closed valve state, the sealing surface part abuts against the valve port part, and the spoiler part is located in the valve port hole.

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