Electronic expansion valve

Abstract

An electronic expansion valve, comprising: a valve body (10), having a fluid port (11), a valve cavity (12) and a valve port (13), the fluid port (11) and the valve port (13) both being in communication with the valve cavity (12); a valve core assembly (20), which is arranged in the valve cavity (12) and can adjust a flow rate of a fluid flowing through the valve port (13); and a noise reduction member (30), provided in the valve cavity (12) and provided between the fluid port (11) and the valve port (13). The noise reduction member (30) and the valve core assembly (20) are arranged separately, and the noise reduction member has a spiral channel (31) and a collection cavity (32), the spiral channel (31) having a first channel port (311) and a second channel port arranged opposite to each other, the first channel port (311) being communicated with the fluid port (11), and the second channel port being communicated with the collection cavity (32). A plurality of throttling holes (33) are formed in the noise reduction member (30), the throttling holes (33) penetrating through the side wall of the spiral channel (31), and the collection cavity (32) communicating with the valve port (13).

Description

Electronic expansion valve

[0001] This application claims priority to the patent application entitled “Electronic Expansion Valve” filed with the State Intellectual Property Office of China on January 5, 2024, with application number 202420046000.4. Technical Field

[0002] The present application relates to the technical field of electronic expansion valves, and in particular to an electronic expansion valve. Background Art

[0003] Currently, electronic expansion valves typically include a valve body and a valve core assembly. The valve body is provided with a fluid port, a valve opening, and a valve cavity. The fluid port and valve opening are both connected to the valve cavity. The valve core assembly is disposed within the valve body and is capable of regulating the flow of fluid passing through the valve opening. However, when fluid enters the valve cavity through the fluid port, it is typically a two-phase fluid containing a large number of uneven bubbles. When the fluid flows out through the valve opening, these uneven bubbles burst as they pass through the valve opening, generating discontinuous noise. Furthermore, due to the small flow area of ​​the valve opening, the fluid is throttled as it passes through the valve opening, increasing the flow rate of the fluid and the noise of the bubbles bursting, thus affecting the user experience. Summary of the Invention

[0004] The present application provides an electronic expansion valve to solve the problem of high noise generated by electronic expansion valves in the prior art.

[0005] The present application provides an electronic expansion valve, which includes: a valve body, the valve body having a fluid port, a valve cavity and a valve port, both of which are connected to the valve cavity; a valve core assembly, arranged within the valve body, the valve core assembly being capable of adjusting the flow of fluid flowing through the valve port; a noise reduction member, arranged in the valve cavity, between the fluid port and the valve port, the noise reduction member and the valve core assembly being separately arranged, the noise reduction member having a spiral channel and a collecting chamber, the spiral channel having a first channel port and a second channel port which are relatively arranged, the first channel port of the spiral channel being connected to the fluid port, the second channel port of the spiral channel being connected to the collecting chamber, and a plurality of throttling holes being arranged on the noise reduction member, the throttling holes being passed through the side wall of the noise reduction member, and the collecting chamber being connected to the valve port.

[0006] According to the technical solution of the present application, a valve core assembly is disposed within a valve cavity, capable of regulating the flow of fluid passing through a valve port. A noise reduction member is disposed between the fluid port and the valve port of the valve body. The noise reduction member comprises a spiral channel and a collecting chamber. A first channel opening of the spiral channel communicates with the fluid port, a second channel opening of the spiral channel communicates with the collecting chamber, and the collecting chamber communicates with the valve port. Furthermore, a plurality of throttling holes are disposed on the sidewall of the noise reduction member. In this arrangement, fluid can enter the spiral channel through the throttling holes and the first channel opening, and the fluid can flow through the throttling holes and the spiral channel to the collecting chamber of the noise reduction member, and then to the valve port. The throttling holes can refine bubbles, i.e., bubbles will burst at the throttling holes. However, due to the large flow area within the spiral channel, the pressure of the fluid can be buffered. Furthermore, the large number of throttling holes disposed in the spiral channel ensures fluid filtration without causing throttling of the fluid within the spiral channel. Consequently, the sound of bubble bursting is reduced, thereby reducing the discontinuous noise caused by bubble bursting and improving the user experience. Because the fluid can enter the spiral channel through both the first channel opening and the multiple throttle holes, the fluid can flow smoothly even if impurities clog some of the throttle holes. Furthermore, because the noise reduction component is separate from the valve core assembly, it is easy for workers to process the valve core assembly and the noise reduction component, as well as to recycle and repair the noise reduction component. Furthermore, workers can replace different types of noise reduction components as needed.

[0007] Furthermore, the noise reduction element is a sheet-like structure, wound from the inside out around the outside of the valve port to form a spiral channel. This arrangement simplifies the structure and facilitates processing of the noise reduction element. It also reduces the space occupied by the noise reduction element, making it easier to arrange the noise reduction element.

[0008] Furthermore, the spiral channel comprises multiple, serially connected annular channels, each with a flow area greater than the flow area of ​​the valve port. This arrangement simplifies the structure and facilitates processing of the noise reduction component. It also reduces the space occupied by the noise reduction component, making it easier to arrange the component.

[0009] Furthermore, the aperture of the throttle hole is less than 0.15 mm. The above structure can ensure the refinement effect of the throttle hole on the bubbles, thereby ensuring the noise reduction effect of the noise reduction component.

[0010] Furthermore, the cross-sectional area of ​​the spiral channel gradually decreases in the direction close to the second channel opening. This arrangement facilitates the processing of the noise reduction component and reduces the processing difficulty of the noise reduction component.

[0011] Furthermore, the valve core assembly includes a nut seat having a through hole and a fixing groove at its bottom. The fixing groove matches the structure of the noise reduction element, and the top of the noise reduction element is inserted into the fixing groove; and a valve core body that is movably inserted into the through hole and threadedly connected to the nut seat. The valve core body can close or open the valve port. This arrangement can secure the noise reduction element and prevent it from rotating, thereby ensuring smooth flow of fluid within the noise reduction element.

[0012] Furthermore, a guide portion is provided at the first channel opening of the spiral channel of the noise reduction member to guide the fluid into the spiral channel. Thus, the guide portion can guide the fluid into the spiral channel, thereby allowing the fluid to flow along the spiral channel and thereby ensuring that the fluid can be discharged smoothly from the valve port.

[0013] Furthermore, the guide portion includes a guide blade located at the end of the spiral channel and extending in a direction close to the inner wall of the valve body. This arrangement increases the flow area of ​​the first channel opening, thereby allowing fluid to enter the spiral channel from the first channel opening. The structure is simple and facilitates the processing of the noise reduction component.

[0014] Furthermore, the electronic expansion valve includes a delivery tube connected to the fluid port. The noise reduction member is provided with a connection hole connected to the spiral channel. The delivery tube extends into the valve cavity and is engaged with the connection hole. This arrangement facilitates the securing of the noise reduction member, preventing it from rotating within the valve cavity, and also facilitates machining and operation of the noise reduction member.

[0015] Furthermore, the connecting hole extends along the axial direction of the valve body and penetrates to the bottom of the noise reduction member. This arrangement facilitates processing of the connecting hole and is easy to operate.

[0016] Furthermore, the outer wall of the noise reduction member near the first channel opening of the spiral channel is in contact with the inner wall of the valve body, and the arc between the outermost end face of the noise reduction member and the center of the connecting hole is Q, which is greater than Such an arrangement can ensure the stability of the noise reduction component in the valve cavity and ensure that the noise reduction work of the noise reduction component can be carried out normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0018] FIG1 shows a schematic structural diagram of an electronic expansion valve provided in Example 1 of the present application;

[0019] FIG2 shows a schematic structural diagram of a noise reduction component provided in Example 1 of the present application;

[0020] FIG3 shows a schematic structural diagram of a nut seat provided in Example 1 of the present application;

[0021] FIG4 shows a schematic structural diagram of an electronic expansion valve provided in Example 2 of the present application;

[0022] FIG5 is a schematic structural diagram showing the coordination of the noise reduction member and the delivery pipe provided in the second embodiment of the present application;

[0023] FIG6 shows a top view of the noise reduction member and the delivery pipe provided in the second embodiment of the present application;

[0024] FIG7 shows a top view of the noise reduction component provided in the second embodiment of the present application.

[0025] Among them, the above-mentioned drawings include the following figure marks: 10, valve body; 11, fluid port; 12, valve chamber; 13, valve port; 20, valve core assembly; 21, nut seat; 211, fixing groove; 22, valve core body; 30, noise reduction component; 31, spiral channel; 311, first channel port; 312, guide plate; 32, collecting chamber; 33, throttling hole; 34, connecting hole; 40, delivery pipe. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] As shown in Figures 1 and 2, a first embodiment of the present application provides an electronic expansion valve, which includes a valve body 10, a valve core assembly 20, and a noise reduction member 30. The valve body 10 has a fluid port 11, a valve cavity 12, and a valve port 13. The fluid port 11 and the valve port 13 are both connected to the valve cavity 12. The valve core assembly 20 is disposed within the valve body 10 and is capable of regulating the flow of fluid through the valve port 13. The noise reduction member 30 is disposed within the valve cavity 12, between the fluid port 11 and the valve port 13. The noise reduction member 30 is disposed separately from the valve core assembly 20. The noise reduction member 30 has a spiral channel 31 and a collecting chamber 32. The spiral channel 31 has a first channel opening 311 and a second channel opening that are oppositely disposed. The first channel opening 311 of the spiral channel 31 is in communication with the fluid port 11, and the second channel opening of the spiral channel 31 is in communication with the collecting chamber 32. The noise reduction member 30 is also provided with a plurality of throttle holes 33 that extend through the sidewall of the noise reduction member 30. The collecting chamber 32 is in communication with the valve port 13. Specifically, the valve body 10 further includes a receiving chamber that is in communication with the valve cavity 12. The valve core assembly 20 is disposed within the receiving chamber and the valve cavity 12. The fluid may be a refrigerant.

[0028] Using the technical solution of the present application, a valve core assembly 20 is disposed within the valve cavity 12. The valve core assembly 20 is capable of regulating the flow of fluid flowing through the valve port 13. A noise reduction member 30 is disposed between the fluid port 11 and the valve port 13 of the valve body 10. The noise reduction member 30 comprises a spiral channel 31 and a collecting chamber 32. A first channel opening 311 of the spiral channel 31 communicates with the fluid port 11, a second channel opening of the spiral channel 31 communicates with the collecting chamber 32, and the collecting chamber 32 communicates with the valve port 13. Furthermore, a plurality of throttle holes 33 are disposed on the sidewall of the noise reduction member 30. With this arrangement, fluid can enter the spiral channel 31 through the throttle holes 33 and the first channel opening 311, and then flow through the throttle holes 33 and the spiral channel 31 to the collecting chamber 32 of the noise reduction member 30, and then to the valve port 13. The throttle holes 33 can refine bubbles, meaning they will burst at the throttle holes 33. However, due to the large flow area within the spiral channel 31, the fluid pressure can be buffered. Furthermore, the numerous throttle holes 33 provided in the spiral channel 31 ensure fluid filtration without causing throttling within the spiral channel 31. Consequently, the sound of bubble bursting is low, reducing the discontinuous noise generated by bubble bursting and improving the user experience. Furthermore, since the fluid can enter the spiral channel 31 through both the first channel opening 311 and the multiple throttle holes 33, even if impurities clog some of the throttle holes 33, the fluid can still flow smoothly. Furthermore, since the noise reduction component 30 is separate from the valve core assembly 20, it is convenient for workers to process the valve core assembly 20 and the noise reduction component 30, as well as to recycle and repair the noise reduction component 30. Furthermore, workers can replace different models of noise reduction components 30 as needed.

[0029] As shown in Figure 2, the noise reducer 30 is a sheet-like structure, wound from the inside out around the outside of the valve port 13 to form a spiral channel 31. This arrangement simplifies the structure and facilitates processing of the noise reducer 30. It also reduces the space occupied by the noise reducer 30, facilitating its placement. The noise reducer 30 can be formed by winding a steel sheet, a filter screen, or an injection molded part.

[0030] The spiral channel 31 includes a plurality of annular channels connected in series, and the flow area of ​​the annular channels is larger than the flow area of ​​the valve port 13. This arrangement can avoid throttling of the fluid when passing through the spiral channel 31, thereby preventing the fluid from generating noise in the spiral channel 31.

[0031] Specifically, the aperture of the throttle hole 33 is less than 0.15 mm. During use, the electronic expansion valve is connected to a pipeline with a filter structure installed within it. Fluid passes through the filter structure before passing through the electronic expansion valve. The diameter of the filter holes in the filter structure is typically set to 0.15 mm. This structure ensures that the throttle hole 33 effectively refines bubbles, thereby ensuring the noise reduction effect of the noise reduction component 30. Alternatively, the aperture of the throttle hole 33 can be 0.14 mm, 0.12 mm, or 0.1 mm. In this application, the aperture of the throttle hole 33 is 0.1 mm.

[0032] Furthermore, the cross-sectional area of ​​the spiral channel 31 gradually decreases in the direction close to the second channel opening. This arrangement facilitates the processing of the noise reduction member 30 and reduces the processing difficulty of the noise reduction member 30.

[0033] As shown in Figures 1 and 3, the valve core assembly 20 includes a nut seat 21 and a valve core body 22. The nut seat 21 is provided with a through-hole, and a fixing groove 211 is provided at the bottom of the nut seat 21. The fixing groove 211 is adapted to the structure of the noise reducer 30, and the top of the noise reducer 30 is inserted into the fixing groove 211. The valve core body 22 is movably inserted into the through-hole and threadedly connected to the nut seat 21. The valve core body 22 can block or open the valve port 13. This arrangement ensures that the fixing groove 211 can secure the noise reducer 30, preventing it from rotating, thereby ensuring smooth flow of fluid within the noise reducer 30.

[0034] A guide portion is provided at the first channel opening 311 of the spiral channel 31 of the noise reduction member to guide the fluid into the spiral channel 31. This configuration allows the guide portion to guide the fluid into the spiral channel 31, thereby allowing the fluid to flow along the spiral channel 31 and thereby ensuring that the fluid can be discharged smoothly from the valve port 13.

[0035] Specifically, the guide portion includes a guide blade 312 located at the end of the spiral channel 31 and extending toward the inner wall of the valve body 10. This arrangement increases the flow area of ​​the first channel opening 311, thereby allowing fluid to flow from the first channel opening 311 into the spiral channel 31. This simplifies the structure and facilitates machining of the noise reduction member 30.

[0036] As shown in Figures 4 to 7, Example 2 of the present application provides an electronic expansion valve. This differs from Example 1 in that the electronic expansion valve further includes a delivery tube 40, which communicates with the fluid port 11. A connection hole 34 is provided on the noise reduction member 30, which communicates with the spiral channel 31. The delivery tube 40 extends into the interior of the valve cavity 12 and is engaged with the connection hole 34. This arrangement facilitates securing the noise reduction member 30, preventing it from rotating within the valve cavity 12. It also facilitates machining of the noise reduction member 30, making it easy to operate.

[0037] As shown in Figure 5, the connection hole 34 extends axially along the valve body 10 and penetrates the bottom of the noise reduction member 30. This arrangement facilitates machining of the connection hole 34 and is easy to operate. Furthermore, in this application, the delivery tube 40 contacts both sides and the top edge of the connection hole 34. This arrangement limits the axial position of the noise reduction member 30, limiting its displacement in both the Z and Y directions.

[0038] Furthermore, the outer wall of the noise reducing member near the first channel opening 311 of the spiral channel 31 is in contact with the inner wall of the valve body 10, that is, the radius of the outer wall of the noise reducing member near the first channel opening 311 is the same as the radius of the valve cavity 12. The arc between the outermost end surface of the noise reducing member and the center of the connecting hole 34 is Q, and Q is greater than In this way, the outer wall of the spiral channel 31 close to the first channel opening 311 is in contact with the inner wall of the valve body 10, and Q is greater than The combination of the two can limit the displacement of the noise reducing member 30 in the X direction and prevent the noise reducing member 30 from moving left and right. Therefore, the displacement of the noise reducing member 30 in the X direction, Y direction and Z direction can be limited. Such a setting can ensure the stability of the noise reducing member 30 in the valve cavity 12 and ensure that the noise reducing work of the noise reducing member 30 can be carried out normally. Optionally, Q can be Or π, in this application, Q is

[0039] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0040] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0041] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0042] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0043] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0044] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An electronic expansion valve, characterized in that, The electronic expansion valve includes: A valve body (10) having a fluid port (11), a valve chamber (12), and a valve port (13), wherein the fluid port (11) and the valve port (13) are both in communication with the valve chamber (12); A valve core assembly (20) disposed within the valve body (10), and the valve core assembly (20) is capable of adjusting the flow rate of the fluid flowing through the valve port (13); A noise reduction member (30) disposed within the valve chamber (12) between the fluid port (11) and the valve port (13). The noise reduction member (30) is separately provided from the valve core assembly (20). The noise reduction member (30) has a spiral channel (31) and a collection chamber (32). The spiral channel (31) has a first channel port (311) and a second channel port disposed opposite to each other. The first channel port (311) of the spiral channel (31) is in communication with the fluid port (11), the second channel port of the spiral channel (31) is in communication with the collection chamber (32), and a plurality of throttle holes (33) are provided on the noise reduction member (30). The throttle holes (33) penetrate through the side wall of the noise reduction member (30), and the collection chamber (32) is in communication with the valve port (13).

2. The electronic expansion valve according to claim 1, wherein The noise reduction member (30) has a sheet-like structure and is wound around the outside of the valve port (13) from the inside to the outside to form the spiral channel (31).

3. The electronic expansion valve according to claim 1, characterized in that, The spiral channel (31) includes a plurality of annular channels connected in sequence, and the flow area of the annular channel is larger than the flow area of the valve port (13).

4. The electronic expansion valve according to claim 1, wherein, The aperture of the throttle hole (33) is less than 0.15 mm.

5. The electronic expansion valve according to claim 1, wherein The cross-sectional area of the spiral channel (31) gradually decreases in the direction close to the second channel port.

6. The electronic expansion valve according to claim 1, wherein The valve core assembly (20) includes: A nut seat (21) provided with a through hole. A fixing groove (211) is provided at the bottom of the nut seat (21). The fixing groove (211) is adapted to the structure of the noise reduction member (30), and the top of the noise reduction member (30) is inserted into the fixing groove (211); A valve core body (22) movably passing through the through hole. The valve core body (22) is threadedly connected to the nut seat, and the valve core body (22) can block or open the valve port (13).

7. The electronic expansion valve according to claim 2, wherein A guiding portion is provided at the first channel port (311) of the spiral channel (31) of the noise reduction member to guide the fluid into the spiral channel (31).

8. The electronic expansion valve according to claim 7, wherein The guiding portion includes a guiding piece (312). The guiding piece (312) is located at the end of the spiral channel (31), and the guiding piece (312) extends in the direction close to the inner wall of the valve body (10).

9. The electronic expansion valve according to claim 1, wherein The electronic expansion valve further includes a delivery pipe (40). The delivery pipe (40) is in communication with the fluid port (11). A connection hole (34) is provided on the noise reduction member (30). The connection hole (34) is in communication with the spiral channel (31). The delivery pipe (40) extends into the valve chamber (12), and the delivery pipe (40) is in snap-fit connection with the connection hole (34).

10. The electronic expansion valve according to claim 9, characterized in that, The connecting hole (34) extends along the axial direction of the valve body (10), and the connecting hole (34) penetrates through to the bottom of the noise reduction member (30).

11. The electronic expansion valve according to claim 9, characterized in that, The outer wall of one end of the noise reduction member (30) close to the first passage opening (311) of the spiral passage (31) is attached to the inner wall of the valve body (10), and the radian between the outermost end face of the noise reduction member (30) and the center of the connection hole (34) is Q, and Q is greater than

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