Noise reduction sleeve and electronic expansion valve

Abstract

The present invention provides a noise reduction sleeve and an electronic expansion valve. The noise reduction sleeve is used for the electronic expansion valve. The noise reduction sleeve is of a cylindrical structure and has a flow equalizing cavity. A plurality of notches are provided on the side wall of the noise reduction sleeve, and each notch communicates with the flow equalizing cavity. The notches extend along the axial direction of the noise reduction sleeve, and one end of each notch extends to the lower end surface of the noise reduction sleeve. Through the technical solution provided by the present application, the problem of high noise of the electronic expansion valve in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic expansion valves, and more particularly, to a noise reduction sleeve and an electronic expansion valve. Background Art

[0002] Generally, an electronic expansion valve includes a housing, a valve needle assembly, an inlet pipe, and an outlet pipe. A valve port is provided inside the housing, the valve needle assembly is arranged corresponding to the valve port, and both the inlet pipe and the outlet pipe are arranged on the housing. Specifically, the valve needle assembly is movably arranged inside the housing, and the valve needle assembly controls the opening and closing of the valve port inside the housing to control the connection situation between the inlet pipe and the outlet pipe.

[0003] In the prior art, when the refrigeration medium enters the electronic expansion valve from the inlet pipe, the refrigeration medium will directly impact the components inside the electronic expansion valve, generating a relatively large noise. Therefore, there is a problem of large noise in the electronic expansion valve in the prior art. Summary of the Invention

[0004] The present invention provides a noise reduction sleeve and an electronic expansion valve to solve the problem of large noise in the electronic expansion valve in the prior art.

[0005] According to one aspect of the present invention, a noise reduction sleeve for an electronic expansion valve is provided. The noise reduction sleeve is of a cylindrical structure and has a flow equalizing cavity. A plurality of notches are provided on the side wall of the noise reduction sleeve, and each notch communicates with the flow equalizing cavity. The notches extend along the axial direction of the noise reduction sleeve, and one end of each notch extends to the lower end face of the noise reduction sleeve.

[0006] Further, a flow disturbance structure is provided on the outer wall and / or inner wall of the noise reduction sleeve, and the flow disturbance structure is used for disturbing the refrigeration medium.

[0007] Further, the flow disturbance structure includes a plurality of flow disturbance bosses, and the plurality of flow disturbance bosses are provided on the outer wall of the noise reduction sleeve. The flow disturbance bosses extend along the axial direction of the noise reduction sleeve, and the plurality of flow disturbance bosses are arranged at intervals along the circumferential direction of the noise reduction sleeve.

[0008] Further, the notch includes a first section and a second section that communicate with each other. The first section is located above the second section, the inner wall of the first section is a curved surface, and the inner wall of the second section is a flat surface.

[0009] Further, the plurality of notches are arranged at intervals along the circumferential direction of the side wall of the noise reduction sleeve.

[0010] According to another aspect of the present invention, an electronic expansion valve is provided. The electronic expansion valve includes: a housing; a nut assembly arranged inside the housing; and a noise reduction sleeve having a first end and a second end arranged opposite to each other. The first end of the noise reduction sleeve is connected to the nut assembly, and the noise reduction sleeve is the noise reduction sleeve provided above.

[0011] Further, the nut assembly includes a nut seat, and a positioning structure is provided between the nut seat and the noise reduction sleeve. The positioning structure is used to position the orientation of the notch of the noise reduction sleeve.

[0012] Further, a first mounting boss is provided at the bottom of the nut seat. The first mounting boss is coaxially arranged with the nut seat. The first end of the noise reduction sleeve is sleeved on the first mounting boss. A positioning boss is provided on one of the outer wall of the first mounting boss and the inner wall of the noise reduction sleeve, and a positioning groove is provided on the other of the outer wall of the first mounting boss and the inner wall of the noise reduction sleeve. The positioning boss and the positioning groove cooperate to form a positioning structure.

[0013] Further, the electronic expansion valve further includes a valve seat core. The valve seat core and the nut assembly are arranged at intervals in the housing. A second mounting boss is provided at the top of the valve seat core. The second mounting boss is coaxially arranged with the valve seat core. The second end of the noise reduction sleeve is sleeved on the second mounting boss.

[0014] Further, a medium inlet is provided on the housing. The included angle between the center line of the notch of the noise reduction sleeve near the medium inlet and the axis of the medium inlet is 45°.

[0015] Applying the technical solution of the present invention, the noise reduction sleeve is a cylindrical structure, and the noise reduction sleeve has a flow equalizing cavity. Specifically, a plurality of notches are provided on the side wall of the noise reduction sleeve, and each notch communicates with the flow equalizing cavity. When the refrigeration medium enters from the inlet of the electronic expansion valve, the flow pattern of the fluid can be changed through the guiding action of the notch, and the refrigeration medium is equalized by using the flow equalizing cavity, avoiding the direct impact of the refrigeration medium on the components inside the electronic expansion valve, and capable of reducing noise. And, the notch extends along the axis direction of the noise reduction sleeve, and one end of the notch extends to the lower end surface of the noise reduction sleeve, so that it is convenient to process and assemble the noise reduction sleeve. Description of the Drawings

[0016] The specification drawings forming a part of the present application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0017] Figure 1 Shows a schematic structural diagram of a noise reduction sleeve provided according to an embodiment of the present invention;

[0018] Figure 2 Shows another schematic structural diagram of a noise reduction sleeve provided according to an embodiment of the present invention;

[0019] Figure 3 Shows a schematic structural diagram of an electronic expansion valve provided according to an embodiment of the present invention;

[0020] Figure 4 Shows Figure 3 A cross-sectional view taken along line A-A in

[0021] Figure 5 Shows another structural schematic diagram of an electronic expansion valve provided according to an embodiment of the present invention;

[0022] Figure 6 Shows Figure 5 A cross-sectional view taken along line B-B in

[0023] Among them, the above-mentioned drawings include the following reference numerals:

[0024] 10, uniform flow chamber;

[0025] 20, notch; 21, first section; 22, second section;

[0026] 30, turbulence structure; 31, turbulence boss;

[0027] 40, housing; 41, medium inlet;

[0028] 50, nut assembly; 51, nut seat; 511, first mounting boss;

[0029] 60, noise reduction sleeve;

[0030] 70, positioning structure; 71, positioning boss; 72, positioning groove;

[0031] 80, valve seat core; 81, second mounting boss;

[0032] a, the included angle between the center line of the notch near the medium inlet and the axis of the medium inlet. Detailed implementation manners

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way constitutes a limitation on the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] Such as Figure 1 And Figure 2As shown in the figure, an embodiment of the present invention provides a noise reduction sleeve, which is used for an electronic expansion valve. Among them, the noise reduction sleeve is a cylindrical structure, preferably made of a non-metallic material through an injection molding process. In this embodiment, the noise reduction sleeve is a cylindrical structure. Specifically, the noise reduction sleeve has a flow equalizing cavity 10, and the flow equalizing cavity 10 can equalize the flow of the refrigeration medium. In this embodiment, a plurality of notches 20 are provided on the side wall of the noise reduction sleeve, and each notch 20 communicates with the flow equalizing cavity 10. The refrigeration medium can enter the flow equalizing cavity 10 through the notch 20, and the flow equalizing cavity is used to equalize the flow of the refrigeration medium. In this embodiment, the notch 20 extends along the axis direction of the noise reduction sleeve, and one end of the notch 20 extends to the lower end face of the noise reduction sleeve.

[0035] Applying the noise reduction sleeve provided by this embodiment, by providing a plurality of notches 20 on the side wall of the noise reduction sleeve, each notch 20 communicates with the flow equalizing cavity 10. When the refrigeration medium enters from the inlet of the electronic expansion valve, the refrigeration medium can change the flow pattern of the fluid through the guiding action of the notch 20 and enter the flow equalizing cavity 10. The flow equalizing cavity is used to equalize the flow of the refrigeration medium, avoiding the refrigeration medium directly impacting the components inside the electronic expansion valve, and playing a role in reducing noise. Moreover, the notch 20 is set to extend along the axis direction of the noise reduction sleeve, and one end of the notch 20 extends to the lower end face of the noise reduction sleeve, which is convenient for processing and assembling the noise reduction sleeve.

[0036] As Figure 2 shown, a flow disturbing structure 30 is provided on the outer wall of the noise reduction sleeve. The flow disturbing structure 30 is used to disturb the flow of the refrigeration medium and change the flow state of the refrigeration medium, so as to further improve the noise reduction effect. Among them, the flow disturbing structure 30 includes flow disturbing bosses, flow disturbing grooves and other structures with flow disturbing effects. In other embodiments, the flow disturbing structure 30 can be provided on the inner wall of the noise reduction sleeve, or the flow disturbing structure 30 can be provided on both the inner wall and the outer wall of the noise reduction sleeve at the same time.

[0037] In this embodiment, the flow disturbing structure 30 includes a plurality of flow disturbing bosses 31. The plurality of flow disturbing bosses 31 are provided on the outer wall of the noise reduction sleeve. The flow disturbing bosses 31 can be used to disturb the flow of the refrigeration medium, and can further improve the noise reduction effect. Specifically, the flow disturbing bosses 31 extend along the axis direction of the noise reduction sleeve, and the plurality of flow disturbing bosses 31 are arranged at intervals along the circumferential direction of the noise reduction sleeve. In this embodiment, both ends of the flow disturbing boss 31 extend to the upper and lower end faces of the noise reduction sleeve respectively. Specifically, one flow disturbing boss 31 is provided between two adjacent notches 20, and one flow disturbing boss 31 is provided above each notch 20. Both ends of the flow disturbing boss 31 located between two adjacent notches 20 extend to the upper and lower end faces of the noise reduction sleeve respectively, and both ends of the flow disturbing boss 31 located above the notch 20 extend to the upper end face of the noise reduction sleeve and the top end of the notch 20 respectively.

[0038] Among them, the notch 20 includes a first section 21 and a second section 22 that are interconnected. The first section 21 is located above the second section 22. Specifically, the inner wall of the first section 21 is a curved surface, and the inner wall of the second section 22 is a flat surface. In this way, it is convenient for the refrigeration medium to enter the flow equalizing cavity 10 from the notch 20, and the noise can be further reduced. In this embodiment, the inner wall of the first section 21 is a semi-circular structure.

[0039] In this embodiment, a plurality of notches 20 are circumferentially spaced along the side wall of the noise reduction sleeve. At least one notch 20 is arranged corresponding to the medium inlet of the electronic expansion valve. In this embodiment, four notches 20 are arranged on the side wall of the noise reduction sleeve. In other embodiments, the number of notches 20 can be set according to the flow condition of the refrigeration medium. For example, three notches 20 or five notches 20 are arranged on the side wall of the noise reduction sleeve.

[0040] As Figures 3 to 6 shown, an embodiment of the present invention provides an electronic expansion valve, which includes a housing 40, a nut assembly 50, and a noise reduction sleeve 60. Among them, both the nut assembly 50 and the noise reduction sleeve 60 are arranged in the housing 40. Among them, the noise reduction sleeve 60 has a first end and a second end arranged oppositely. The first end of the noise reduction sleeve 60 is connected to the nut assembly 50, and the noise reduction sleeve 60 is the noise reduction sleeve provided above. In this way, the noise reduction sleeve 60 can be used to reduce the noise of the electronic expansion valve.

[0041] In this embodiment, the nut assembly 50 includes a nut seat 51. A positioning structure 70 is arranged between the nut seat 51 and the noise reduction sleeve 60. The positioning structure 70 is used to position the orientation of the notch 20 of the noise reduction sleeve 60 so that the orientation of the notch 20 is a preset direction, ensuring the noise reduction effect. Among them, the positioning structure 70 includes a structure in which a positioning boss and a positioning groove cooperate with each other and a structure in which a pin and a positioning hole cooperate with each other, as long as it can play a role in positioning the orientation of the notch 20.

[0042] As Figure 5 and Figure 6As shown in the figure, a first mounting boss 511 is provided at the bottom of the nut seat 51. The first mounting boss 511 is coaxially arranged with the nut seat 51. The first end of the noise reduction sleeve 60 is sleeved on the first mounting boss 511, so that the noise reduction sleeve 60 can be fixed in the housing 40. Specifically, a positioning boss 71 is provided on one of the outer wall of the first mounting boss 511 and the inner wall of the noise reduction sleeve 60, and a positioning groove 72 is provided on the other of the outer wall of the first mounting boss 511 and the inner wall of the noise reduction sleeve 60. The positioning boss 71 and the positioning groove 72 cooperate to form a positioning structure 70. In this embodiment, the positioning boss 71 is provided on the inner wall of the noise reduction sleeve 60, and the positioning groove 72 is provided on the outer wall of the first mounting boss 511, and both the positioning boss 71 and the positioning groove 72 extend along the axial direction of the noise reduction sleeve 60. Specifically, the cross-sectional shapes of both the positioning boss 71 and the positioning groove 72 are semicircular, so that it is convenient to insert the positioning boss 71 into the positioning groove 72 to play a role in positioning and anti-rotation. In other embodiments, the positioning boss 71 can be provided on the outer wall of the first mounting boss 511, and the positioning groove 72 can be provided on the inner wall of the noise reduction sleeve 60.

[0043] In this embodiment, the electronic expansion valve further includes a valve seat core 80. The valve seat core 80 and the nut assembly 50 are arranged at intervals in the housing 40, and the valve seat core 80 is provided with a valve port. Among them, a second mounting boss 81 is provided at the top of the valve seat core 80. The second mounting boss 81 is coaxially arranged with the valve seat core 80. By sleeving the second end of the noise reduction sleeve 60 on the second mounting boss 81, the noise reduction sleeve 60 can be used to guide the nut seat 51 and the valve seat core 80 to ensure the coaxiality of the nut seat 51 and the valve seat core 80 and improve the precision of the device. Specifically, the noise reduction sleeve 60 and the valve seat core 80 are in interference fit, and the noise reduction sleeve 60 and the nut seat 51 are in transition or interference fit.

[0044] As Figure 4 shown, a medium inlet 41 is provided on the housing 40. The included angle a between the center line of the notch 20 of the noise reduction sleeve 60 close to the medium inlet 41 and the axis of the medium inlet 41 is 45°, and the uniform flow effect is better, so that the noise reduction effect can be ensured. In other embodiments, the included angle a between the center line of the notch 20 of the noise reduction sleeve 60 close to the medium inlet 41 and the axis of the medium inlet 41 can be 36° or 60°. If the notch 20 is 3, then a is 60°. If the notch 20 is 5 flow ports, then a is 36°.

[0045] In this embodiment, the noise reduction sleeve 60 is formed by resin injection molding, which has the advantages of being easy to process and low cost.

[0046] With the device provided by this embodiment, the drainage effect of multiple arched notches 20 can be utilized to change the fluid flow pattern, and the effect of reducing noise can be achieved. Moreover, one end of the notch 20 extends to the lower end surface of the noise reduction sleeve, which has the advantages of being easy to process, easy to assemble, and low cost.

[0047] 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 forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or their combinations.

[0048] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention; the orientation words "inner, outer" refer to the inside and outside relative to the contour of each component itself.

[0050] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper" etc. may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that the spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the corresponding explanations for the spatial relative descriptions used herein will be made accordingly.

[0051] In addition, it should be noted that the use of terms such as "first", "second" etc. to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present invention.

[0052] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A noise reduction sleeve for an electronic expansion valve, characterized in that, The noise reduction sleeve is of a cylindrical structure. The noise reduction sleeve has a flow equalizing cavity (10). A plurality of notches (20) are provided on the side wall of the noise reduction sleeve. Each notch (20) communicates with the flow equalizing cavity (10). The notches (20) extend along the axial direction of the noise reduction sleeve, and one end of each notch (20) extends to the lower end face of the noise reduction sleeve. A flow disturbance structure (30) is provided on the outer wall of the noise reduction sleeve. The flow disturbance structure (30) is used for disturbing the refrigeration medium. The flow disturbance structure (30) includes a plurality of flow disturbance bosses (31). The plurality of flow disturbance bosses (31) are provided on the outer wall of the noise reduction sleeve. The flow disturbance bosses (31) extend along the axial direction of the noise reduction sleeve. The plurality of flow disturbance bosses (31) are arranged at intervals in the circumferential direction of the noise reduction sleeve, and there is one flow disturbance boss (31) between two adjacent notches (20).

2. The noise reduction sleeve according to claim 1, wherein, The notch (20) includes a first section (21) and a second section (22) that communicate with each other. The first section (21) is located above the second section (22). The inner wall of the first section (21) is a curved surface, and the inner wall of the second section (22) is a plane.

3. The noise reduction sleeve according to claim 1, wherein The plurality of notches (20) are arranged at intervals in the circumferential direction of the side wall of the noise reduction sleeve.

4. An electronic expansion valve, characterized in that, The electronic expansion valve includes: a housing (40); a nut assembly (50) provided in the housing (40); a noise reduction sleeve (60). The noise reduction sleeve (60) has a first end and a second end that are oppositely arranged. The first end of the noise reduction sleeve (60) is connected to the nut assembly (50). The noise reduction sleeve (60) is the noise reduction sleeve according to any one of claims 1 to 3.

5. The electronic expansion valve according to claim 4, characterized in that, The nut assembly (50) includes a nut seat (51). A positioning structure (70) is provided between the nut seat (51) and the noise reduction sleeve (60). The positioning structure (70) is used for positioning the orientation of the notch (20) of the noise reduction sleeve (60).

6. The electronic expansion valve according to claim 5, characterized in that, A first mounting boss (511) is provided at the bottom of the nut seat (51). The first mounting boss (511) is coaxially arranged with the nut seat (51). The first end of the noise reduction sleeve (60) is sleeved on the first mounting boss (511). A positioning boss (71) is provided on one of the outer wall of the first mounting boss (511) and the inner wall of the noise reduction sleeve (60). A positioning groove (72) is provided on the other of the outer wall of the first mounting boss (511) and the inner wall of the noise reduction sleeve (60). The positioning boss (71) and the positioning groove (72) cooperate to form the positioning structure (70).

7. The electronic expansion valve according to claim 4, wherein The electronic expansion valve further includes a valve seat core (80). The valve seat core (80) and the nut assembly (50) are arranged at intervals in the housing (40). A second mounting boss (81) is provided at the top of the valve seat core (80). The second mounting boss (81) is coaxially arranged with the valve seat core (80). The second end of the noise reduction sleeve (60) is sleeved on the second mounting boss (81).

8. The electronic expansion valve according to claim 4, characterized in that, A medium inlet (41) is provided on the housing (40), and the included angle between the center line of the notch (20) of the noise reduction sleeve (60) near the medium inlet (41) and the axis of the medium inlet (41) is 45°.

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