Electronic expansion valve

Abstract

According to the electronic expansion valve, the turbulent flow part is additionally arranged on the hole wall of the valve port hole channel of the valve port part, the turbulent flow part is located below the sealing matching part, and the turbulent flow part is arranged in the circumferential direction of the hole wall and protrudes and / or sinks from the surface of the hole wall; due to the existence of the turbulent flow part, when the fluid passes through the flow channel, the flow velocity of each point in the circumferential direction is obviously different, the fluid flowing state is improved, and the situation that the vortex shedding frequency is concentrated on the single frequency due to the fact that the flow velocity of each point in the circumferential direction is 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, the sealing surface part can form a sealing fitting part by abutting against the valve port part, the valve port part has a spoiler part, the spoiler part is located below the sealing fitting part, the valve port part is provided with a valve port channel, and the spoiler part is arranged along the circumferential direction of the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0005] 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, the sealing surface part can form a sealing fitting part by abutting against the valve port part, the valve port part has a spoiler part, the spoiler part is located below the sealing fitting part, the valve port part is provided with a valve port channel, and the spoiler part is arranged along the circumferential direction of the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0006] 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, the sealing surface part can form a sealing fitting part by abutting against the valve port part, the valve port part has a spoiler part, the spoiler part is located below the sealing fitting part, the valve port part is provided with a valve port channel, and the spoiler part is arranged along the circumferential direction of the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0007] The present application provides an electronic expansion valve, a first turbulence part is arranged on the hole wall of the valve port hole of the valve port part in the circumferential direction, the first turbulence part is arranged along the circumferential direction of the hole wall and protrudes and / or is recessed from the hole wall surface; and meanwhile, a second turbulence part is additionally arranged on the valve core, the second turbulence part is arranged below the sealing cooperation part, the second turbulence part is arranged along the circumferential direction of 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 channel is significantly different due to the existence of the first turbulence part and the second turbulence part, the fluid flow state is improved, the situation that the vortex shedding frequency is concentrated on a single frequency due to the relatively consistent flow velocity of each point in the circumferential direction is improved, and further, the howling noise is caused. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The present application provides an electronic expansion valve with a valve core seat structure, and the whole structure is shown in the schematic view;

[0009] Figure 2 The valve core and the valve port part cooperation part structure of the present application are shown in the enlarged schematic view; Figure 1

[0010] Figure 3 The valve seat structure of the electronic expansion valve of the two embodiments provided by the present application is shown in the schematic view;

[0011] Figure 4 The whole structure of the electronic expansion valve of the third embodiment provided by the present application is shown in the schematic view; BRIEF DESCRIPTION OF DRAWINGS

[0013] Valve seat 10, valve cavity 10A; Valve core seat 11, valve port part 111, valve port 111A, valve port hole 111B, through hole 112; Large diameter part 121, medium diameter part 122, adjusting part 123, sealing surface part 1231, end surface 1232; Turbulence part 11A, first connecting pipe 100, second connecting pipe 200 DETAILED DESCRIPTION

[0014] In order for those skilled in the art to 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, and it should be noted that the electronic expansion valve structure provided by the present application is mainly designed and improved for the valve core structure, and other structures such as the valve port part, the valve rod, the nut and the like can be adjusted adaptively according to the system occasion.

[0015] First embodiment

[0016] Please refer to Figure 1 In combination with Figure 2 ​As shown, the electronic expansion valve 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, the valve core seat 11 is fixedly connected with the valve seat 1, the valve core seat 11 and the valve seat 10 substantially define a valve cavity 10A, it should be noted that the substantially define 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, the valve port portion 111 is provided with a valve port hole 111B, the valve core seat 11 is further provided with a through hole 112, the valve core 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 is directly formed on the valve seat 10; or the valve port portion can also be processed as a separate element and arranged separately from the valve seat 10, and then the two are fixedly connected, the present application is only described by taking the valve core seat provided with the valve port portion as an example for convenience of description, and the specific setting form of the valve port portion is not limited;

[0017] The valve core 12 comprises a large-diameter portion 121, a medium-diameter portion 122 and a regulating portion 123 in a conical structure, the medium-diameter portion 122 is located between the large-diameter portion 121 and the regulating portion 123, the regulating portion 123 comprises a sealing surface portion 1231 and an end surface 1232 located below the sealing surface portion 1231, the regulating portion 123 comprises a first end portion and a second end portion, the cross-sectional area of the second end portion close to the medium-diameter portion 122 is greater than that of the first end portion away from the medium-diameter portion 122, the sealing surface portion 1231 can abut or move away from the valve port 111A, when the electronic expansion valve is in an open valve state, the regulating portion 123 moves away from the valve port 111A; when the electronic expansion valve is in a closed valve state, the regulating portion 123 abuts against the valve port portion 111, i.e. the sealing surface portion 1231 abuts against the valve port portion 111 to form a sealing fit portion B, the valve core seat 11 and the valve seat 10 can be fixedly connected by welding, the valve core seat 11 comprises a valve port portion 111 provided with a valve port, the valve port portion 111 is provided with a valve port hole 111B, the valve port portion 111 is provided with a turbulence portion 11A, the turbulence portion 11A is arranged along the circumference of the hole wall of the valve port hole and protrudes from the surface of the hole wall, specifically, in the embodiment, the turbulence portion 11A can be a spherical structure, which protrudes outward from the surface of the hole wall and a plurality of turbulence portions are uniformly and spacedly arranged along the circumference of the hole wall, in order to achieve better turbulence effect, along the height direction of the electronic expansion valve, the turbulence portion 11A is located between the sealing fit portion B and the end surface 1232 of the valve core, it should be noted that the turbulence portion can also be strip-shaped or other structures.

[0018] 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 through the through hole 112, and when passing through the original regular cylindrical valve port channel, the refrigerant flow rate at each point in the circumferential direction of the valve port channel is relatively consistent, which easily causes the vortex shedding frequency to concentrate on a single frequency, thereby causing obvious single-frequency whistling noise. After the spoiler portion is additionally provided on the hole wall of the valve port channel of the valve port portion, the flow rate at each point in the circumferential direction of the valve port channel is significantly different when the refrigerant flows through this position due to the presence of the spoiler portion, which improves the refrigerant flow state and makes the vortex shedding frequency inconsistent, greatly improving the single-frequency whistling noise and relatively reducing the noise to improve the customer experience.

[0019] It should be noted that the spoiler portion can be provided in the circumferential direction of the hole wall, and structures that protrude from the surface of the hole wall and are recessed can exist at the same time, and the technical effects of the present application can also be achieved.

[0020] Second embodiment

[0021] The following refers to Figure 3 The following refers to Figure 1 , Figure 2 The second embodiment provided by the present application is different from the first embodiment in that the structure of the spoiler portion. In this embodiment, the spoiler portion 12A is in a spherical structure and is recessed inward from the surface of the hole wall of the valve port channel. The spoiler portion 12A is uniformly and spacedly arranged in the circumferential direction of the hole wall. It should be noted that the spoiler portion can be provided in the circumferential direction of the hole wall, and structures that protrude from the surface of the hole wall and are recessed can exist at the same time, and the technical effects of the present application can also be achieved.

[0022] Third embodiment

[0023] The following refers to Figure 4 The following refers to Figure 1 , 2 In this embodiment, the hole wall of the valve port channel of the valve port portion is provided with a first spoiler portion 11A, and the adjusting portion 123 is further provided with a second spoiler portion 13A. The second spoiler portion 13A is located below the sealing surface portion B, is arranged close to the end surface 1232, and is arranged in the circumferential direction of the sealing surface portion 1231. In this embodiment, the spoiler portion 13A is in a circular recess structure. The spoiler portion 13A is recessed inward from the surface of the sealing surface portion 1231. A plurality of spoiler portions 13A are uniformly and spacedly arranged in the circumferential direction of the sealing surface portion, and one side of the circular recess is open through the end surface 1232.

[0024] The following actuation principle is stated: After the refrigerant enters the valve cavity 10A from the first connecting pipe 100, it enters the valve port through the through hole 112, passes through the conical surface of the original regular-shaped valve needle and the regular-shaped cylindrical valve port channel, and then the refrigerant flow rate at each point in the cross-sectional circumferential direction of the valve port channel 111B is relatively uniform, which easily leads to the vortex shedding frequency concentrating on a single frequency, thereby causing obvious single-frequency whistling noise. By providing the first turbulence portion on the hole wall of the valve port channel of the valve port portion and simultaneously providing the second turbulence portion on the adjustment portion, and by locating the first and second turbulence portions below the sealing fitting portion B, the refrigerant flow rate at each point in the circumferential direction of the valve port channel will be significantly different when the refrigerant flows through this position due to the presence of the turbulence portion, which improves the refrigerant flow state and makes the vortex shedding frequency inconsistent, greatly improving the single-frequency whistling noise and relatively reducing the noise to improve the customer experience.

[0025] The electronic expansion valve provided by the application comprises a valve port portion 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 portion, the sealing surface portion can abut against the valve port portion to form a sealing fitting portion, the valve port portion is provided with a turbulence portion, the turbulence portion is located below the sealing fitting portion, the valve port portion is provided with a valve port channel, and the turbulence portion is arranged along the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0026] The electronic expansion valve provided by the application comprises a valve port portion 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 portion, the sealing surface portion can abut against the valve port portion to form a sealing fitting portion, the valve port portion is provided with a turbulence portion, the turbulence portion is located below the sealing fitting portion, the valve port portion is provided with a valve port channel, and the turbulence portion is arranged along the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0027] The electronic expansion valve provided by the application comprises a valve port portion 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 portion, the sealing surface portion can abut against the valve port portion to form a sealing fitting portion, the valve port portion is provided with a turbulence portion, the turbulence portion is located below the sealing fitting portion, the valve port portion is provided with a valve port channel, and the turbulence portion is arranged along the hole wall of the valve port channel and protrudes and / or is recessed from the surface of the hole wall.

[0028] The present application provides an electronic expansion valve, a first turbulence part is arranged on the hole wall of the valve port hole of the valve port part in the circumferential direction, the first turbulence part is arranged along the circumferential direction of the hole wall and protrudes and / or is recessed from the hole wall surface; and at the same time, a second turbulence part is additionally arranged on the valve core, the second turbulence part is located below the sealing cooperation part, the second turbulence part is arranged along the circumferential direction of 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 channel will be significantly different due to the existence of the first turbulence part and the second turbulence part, the fluid flow state is improved, the situation that the vortex shedding frequency is concentrated in a single frequency due to the relative consistency of the flow velocity of each point in the circumferential direction of the original, and then the howling noise is caused is improved.

[0029] It should be noted that the up, down, left, right and other orientation terms mentioned herein are based on the drawings as a reference, and are introduced for convenience of description; and the ordinal terms in the component names, such as 'first','second', are also introduced for convenience 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 parts are uniformly named in the specification. The electronic expansion valve provided by the related technical solutions is described in detail above, the specific embodiments are applied in the description, the description of the above embodiments is only used to help understand the method of the present application and its core idea, and does not limit the present application in any form.

Claims

1. An electronic expansion valve characterized by, The valve core includes an end face, the end face is located below the sealing face part, when the valve is closed, the sealing face part abuts against the valve port part to form a sealing fit part, along the height direction of the electronic expansion valve, the spoiler part is located between the sealing fit part and the end face.

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 face part is arranged on the adjusting part, and the adjusting part is provided with the end face.

3. The electronic expansion valve according to claim 1, wherein The spoiler part is in a strip or spherical structure, is recessed inward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole.

4. The electronic expansion valve according to claim 1, wherein The spoiler part is in a strip or spherical structure, is recessed outward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole.

5. The electronic expansion valve according to claim 1, wherein The spoiler part is in a spiral structure, is arranged in a spiral manner along the axial direction of the valve port hole from the end face of the valve core to the sealing fit part.

6. The electronic expansion valve according to claim 1, wherein The electronic expansion valve includes a valve core seat and a valve seat, the valve core seat is fixedly connected with the valve seat, the valve core seat is provided with the valve port part and a through hole.

7. Electronic expansion valve according to any of claims 1 to 6, characterized in that The valve core includes an end face, the end face is located below the sealing face part, when the valve is closed, the sealing face part abuts against the valve port part to form a sealing fit part, along the height direction of the electronic expansion valve, the spoiler part is located between the sealing fit part and the end face.

8. An electronic expansion valve characterized by 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 face part is arranged on the adjusting part, and the adjusting part is provided with the end face.

9. The electronic expansion valve according to claim 8, characterized in that The spoiler part is in a strip or spherical structure, is recessed inward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a strip or spherical structure, is recessed outward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a spiral structure, is arranged in a spiral manner along the axial direction of the valve port hole from the end face of the valve core to the sealing fit part. The electronic expansion valve includes a valve core seat and a valve seat, the valve core seat is fixedly connected with the valve seat, the valve core seat is provided with the valve port part and a through hole. The valve core includes an end face, the end face is located below the sealing face part, when the valve is closed, the sealing face part abuts against the valve port part to form a sealing fit part, along the height direction of the electronic expansion valve, the spoiler part is located between the sealing fit part and the end face. 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 face part is arranged on the adjusting part, and the adjusting part is provided with the end face. The spoiler part is in a strip or spherical structure, is recessed inward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a strip or spherical structure, is recessed outward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a spiral structure, is arranged in a spiral manner along the axial direction of the valve port hole from the end face of the valve core to the sealing fit part. The electronic expansion valve includes a valve core seat and a valve seat, the valve core seat is fixedly connected with the valve seat, the valve core seat is provided with the valve port part and a through hole. The valve core includes an end face, the end face is located below the sealing face part, when the valve is closed, the sealing face part abuts against the valve port part to form a sealing fit part, along the height direction of the electronic expansion valve, the spoiler part is located between the sealing fit part and the end face. 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 face part is arranged on the adjusting part, and the adjusting part is provided with the end face. The spoiler part is in a strip or spherical structure, is recessed inward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a strip or spherical structure, is recessed outward from the surface of the hole wall and is arranged in a spaced manner along the circumference of the valve port hole. The spoiler part is in a spiral structure, is arranged in a spiral manner along the axial direction of the valve port hole from the end face of the valve core to the sealing fit part. The electronic expansion valve includes a valve core seat and a valve seat, the valve core seat is fixedly connected with the valve seat, the valve core seat is provided with the valve port part and a through hole.

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