Electronic expansion valve
By setting a variable-elastic noise reduction part between the slip ring and the stop rod of the electronic expansion valve, the problem of impact noise and vibration between the slip ring and the stop rod is solved, achieving better noise reduction and improved user comfort.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG SANHUA INTELLIGENT CONTROLS CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-07-14
AI Technical Summary
During the stopping process of the electronic expansion valve, the impact between the slip ring and the rotor component generates mechanical noise and vibration. The existing protective sleeve material has a large density and rigidity, resulting in the wear and noise problems not being effectively improved.
Design an electronic expansion valve with a noise reduction part between the slip ring and the stop rod, including a connecting part, a hollow part and a stop part. The stop part can be elastically deformed, and a hollow deformation position is reserved to dissipate vibration energy and reduce vibration transmission.
It effectively reduces mechanical noise and improves user comfort. The improved noise reduction structure quickly dissipates vibration energy and reduces the transmission of vibration energy on the slip ring.
Smart Images
Figure CN224498836U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of refrigeration control technology, specifically to an electronic expansion valve. Background Technology
[0002] Electronic expansion valves are used in refrigeration systems to regulate the flow of refrigerant. During the stopping process, the impact between the slip ring and the stop rod of the rotor component can easily generate mechanical noise, affecting user comfort. Therefore, a protective sleeve is added between the slip ring and the stop rod, which reduces the wear and impact noise caused by the collision to a certain extent. However, the slip ring still vibrates significantly, and the improvement effect is not ideal. Utility Model Content
[0003] Through long-term research, the inventor of the utility model discovered that a major reason why slip rings are prone to significant vibration is that, although a flexible protective sleeve is used between the slip ring and the stop rod, the protective sleeve is still a solid material with high density and rigidity. This has a limited effect on reducing the peak impact force between the slip ring and the stop rod, resulting in a small deformation space and slow vibration attenuation.
[0004] Therefore, the present invention provides the following technical solution:
[0005] This application provides an electronic expansion valve, including a slip ring and a rotor assembly. The rotor assembly includes a stop rod, and the slip ring includes a stop portion. The stop portion or the stop rod is provided with a noise reduction portion. The noise reduction portion includes a connecting portion, a hollow portion, and abutting portion. The hollow portion is closer to the abutting portion than the connecting portion. At least one of the stop portion and the stop rod is at least partially fixedly connected or limitedly connected to the connecting portion. The abutting portion abuts against the other, and the abutting portion can elastically deform toward the hollow portion.
[0006] This application improves the design of the noise reduction part by incorporating a connecting part, a hollow part, and a stop part. The hollow part is closer to the stop part than the connecting part. The stop part abuts against the stop rod through the noise reduction part. At least one of the stop part and the stop rod is fixedly or partially connected to the connecting part or limited by it. The stop part abuts against the other part and can elastically deform towards the hollow part. The noise reduction part has a reserved hollow deformation position, creating a buffer zone. During operation, the stop part abuts against the stop rod through the noise reduction part, which can dissipate vibration energy more quickly, thereby reducing the vibration energy transmitted to the slip ring, reducing vibration and thus reducing mechanical noise, and better improving the noise problem. Attached Figure Description
[0007] Figure 1 This is a cross-sectional view of the overall structure of an embodiment of the electronic expansion valve provided by this utility model;
[0008] Figure 2This is a three-dimensional structural schematic diagram of the stop mechanism of the first embodiment of the electronic expansion valve provided by this utility model;
[0009] Figure 3 This is a three-dimensional structural diagram of the slip ring of the electronic expansion valve provided by this utility model;
[0010] Figure 4 This is a three-dimensional structural diagram of a slip ring with a first noise reduction section provided by this utility model;
[0011] Figure 5 This is a three-dimensional structural diagram of the stop mechanism of the second embodiment of the electronic expansion valve provided by this utility model;
[0012] Figure 6 This is a three-dimensional structural diagram of the stop mechanism in the third embodiment of the electronic expansion valve provided by this utility model.
[0013] Figure Labels
[0014] Valve body 10, valve port 11, outer shell 20, rotor assembly 30, stop rod 31, lead screw valve needle assembly 40, lead screw 41, valve core 42, nut assembly 50, nut 51, connecting piece 52, guide sleeve 60, spring guide rail 70, slip ring 80, stop part 81, slip ring center A, noise reduction part 90, abutment part 91, tail part 92, connecting part 93, hollow part 94;
[0015] First noise reduction part 90a, head 91a, first tail part 92a, first hole part 93a, second hole part 94a;
[0016] Second noise reduction part 90b, main body part 901b, thin wall 902b, lip part 91b, second tail part 92b, second hole part 93b, cavity part 94b, opening 95b;
[0017] Third noise reduction section 90c, first extension section 911c, second extension section 912c, first extension cavity 9111c, second extension cavity 9121c, extension wall 9122c, step section 913c Detailed Implementation
[0018] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.
[0019] Furthermore, all descriptions of the embodiments in this specification are based on the contents of the accompanying drawings. The directional terms such as "up," "down," "inner," and "outer" used in the text are descriptions made in reference to the accompanying drawings. Their purpose is to facilitate the description of this utility model and should not be regarded as a limitation of this utility model.
[0020] This application provides an electronic expansion valve, including a slip ring 80 and a rotor assembly 30. The rotor assembly 30 includes a stop rod 31, and the slip ring 80 includes a stop portion 81. The stop portion 81 or the stop rod 31 is provided with a noise reduction portion 90. The noise reduction portion 90 includes a connecting portion 93, a hollow portion 94, and abutting portion 91. The hollow portion 94 is closer to the abutting portion 91 than the connecting portion 93. At least one of the stop portion 81 and the stop rod 31 is at least partially fixedly connected or limitedly connected to the connecting portion 93. The abutting portion 91 abuts against the other, and the abutting portion 91 can elastically deform toward the hollow portion 94.
[0021] This application improves the design of the noise reduction part by providing a connecting part 93, a hollow part 94, and a stop part 91. The hollow part 94 is closer to the stop part 91 than the connecting part 93. The stop part 81 abuts against the stop rod 31 through the noise reduction part 90. At least one of the stop part 81 and the stop rod 31 is fixedly or limitedly connected to the connecting part 93. The stop part 91 abuts against the other, and the stop part 91 can elastically deform towards the hollow part 94. The noise reduction part 90 has a reserved hollow deformation position, which establishes a buffer zone. When actuated, the stop part abuts against the stop rod through the noise reduction part, which can dissipate vibration energy more quickly, thereby reducing the vibration energy transmitted to the slip ring, reducing vibration and thus reducing mechanical noise, and can better improve the noise problem.
[0022] First Embodiment
[0023] Reference Figure 1-4 As shown, the electronic expansion valve includes a valve body 10, a connecting seat, and a housing 20. The connecting seat is fixedly connected to the valve body 10 and the housing 20 respectively. The valve body 10, the connecting seat, and the housing 20 are fixedly connected to form a receiving cavity. The valve body 10 includes a valve port portion 11 with a valve port. The electronic expansion valve also includes a rotor assembly 30, a lead screw valve needle assembly 40, a nut component 50, and a guide sleeve 60. The guide sleeve 60 is fixedly connected to the valve body 10. The rotor assembly 30, the nut component 50, and part of the lead screw valve needle assembly 40 are located in the receiving cavity. The rotor assembly 30 includes a rotor component, a rotor connecting seat, and a stop rod 31. The stop rod 31 is fixedly connected to the rotor connecting seat and extends along the axial direction of the electronic expansion valve. The extension setting includes a nut component 50, which includes a nut 51 and a connecting piece 52. The nut 51 is fixedly connected to the valve body 10 through the connecting piece 52. The screw valve needle assembly 40 includes a screw 41, a valve core 42, a valve core sleeve, and elastic elements. The screw 41 and the valve core 42 are floatingly connected through the elastic elements. The valve core sleeve is slidably engaged with the guide sleeve 60. The guide sleeve 60 includes an upper guide portion and a lower guide portion. The upper guide portion provides guidance for the valve core sleeve. The valve core 42 is slidably engaged with the guide sleeve 60. The lower guide portion provides guidance for the valve core 42. The screw 41 is threadedly engaged with the nut 51. Under the threaded engagement, the valve core 42 can abut against or move away from the valve port 11 to regulate the flow rate of the refrigerant through the valve port.
[0024] The electronic expansion valve also includes a stop mechanism, which comprises a spring guide rail 70, a slip ring 80, and a stop rod 31. The spring guide rail 70 is sleeved on the nut 51 and includes an upper stop and a lower stop. The slip ring 80 is also sleeved on the nut 51 and can rotate along the axial direction of the spring guide rail. The slip ring 80 includes a stop portion 81 extending from the slip ring body. A coil component is installed on the outer periphery of the housing 20. Under energization, the stop rod 31 can drive the stop portion 81 to rotate. When the valve needs to be closed, it drives the stop portion 81 to rotate downward until it abuts against the lower stop. When fully open, it drives the stop portion 81 to rotate upward until it abuts against the upper stop, thereby controlling the valve opening. The actuation stroke of the lead screw valve needle assembly includes a first noise reduction part 90a between the stop part 81 and the stop rod 31. This part includes an arc-shaped head 91a, a first tail 92a, a first hole 93a, and a second hole 94a. The first hole 93a and the second hole 94a are spaced apart, and both penetrate the front and rear sides of the first noise reduction part 90a. The second hole 94a is closer to the head 91a than the first hole 93a. The stop part 81 is at least partially located within the first hole 93a. In this embodiment, the head 91a forms abutment, the first hole 93a forms a connecting part, and the second hole 94a forms a hollow part. The first noise reduction part can be made of a flexible material. For example, during connection, a fixed connection between the connecting part and the stop part 81 can be achieved through a tight fit or vulcanization process. Alternatively, the stop part 81 can pass through the first hole 93a and be connected to the through hole by a gasket, thus achieving a limiting connection. The specific connection method between the first noise reduction part and the stop part 81 is not limited here. The first noise reduction part is made of hydrogenated nitrile rubber with a hardness range of 70-80HA. To reduce the material cost of the components, the head 91a, which serves as the abutment, can be configured as an arc-shaped structure. The stop part 81 of the slip ring 80 is defined to have a slip ring center A, wherein the head 91a is located at a distance from the slip ring center. The distance range of A is 1mm-3mm, and the distance range of the first tail 92a from the center A of the slip ring is 0.5mm-1mm. Through the above parameter design, the overall thickness of the noise reduction part is reduced, which improves the material utilization rate. When it is in motion, the head 91a abuts against the stop rod 31 and can elastically deform towards the second hole 94a. Through the above design, the first noise reduction part 90a is preset with a hollow position for deformation. When the slip ring abuts against the stop rod through the first noise reduction part, it can dissipate vibration energy more quickly, so as to reduce the vibration energy transmitted to the slip ring, reduce vibration and thus reduce mechanical noise, which can better improve the noise problem and improve the user's comfort.
[0025] Second Embodiment
[0026] The following reference Figure 1 , 3As shown in Figure 5, the difference from the first embodiment lies in the structure of the noise reduction part. The second noise reduction part 90b includes a main body 901b and two thin walls 902b extending from the main body. Each of the two thin walls 902b has a lip 91b formed by facing each other. The lip 91b has an opening. The second noise reduction part 90b is provided with a second hole 93b, which is located in the main body 901b and penetrates the front and rear sides of the main body 901b. The stop part 81 is at least partially located in the second hole 93b and is fixedly connected or limited to it. The connection can also be achieved by a vulcanization process. The second noise reduction part 90b is provided with a cavity 94b, including a second tail 92b. The inner cavity 94b... The cavity is connected to the opening. The cavity portion 94b is closer to the lip portion 91b than the second hole portion 93b. In this embodiment, the lip portion 91b forms abutment portion, the second hole portion 93b forms connecting portion, and the cavity portion 94b forms hollow portion. During operation, the lip portion 91b abuts against the stop rod 31 and can elastically deform toward the cavity portion. In order to reduce the material cost of the noise reduction portion, the stop portion 81 of the slip ring 80 is defined to have a slip ring center A. The distance between the lip portion and the slip ring center A is in the range of 1mm-3mm, and the distance between the second tail portion and the slip ring center A is in the range of 0.5mm-1mm. The related technical effects and functions have been described in detail in the first embodiment and will not be repeated here.
[0027] Third Embodiment
[0028] The following reference Figure 1 , 3 As shown in Figure 5, the structure of the third noise reduction unit is described. The third noise reduction unit 90c is generally flat and includes a first extension 911c and a second extension 912c protruding from the first extension 911c. The first extension 911c has a first extension cavity 9111c, and the stop bar 91 is at least partially located in the first extension cavity 9111c and fixedly connected or limited thereto. The second extension 912c has a second extension cavity 9121c and an extension wall 9122c. The second extension cavity 9121c is closer to the extension wall 9122c than the first extension cavity 9111c. In this embodiment... In the first embodiment, the extension wall 9122c forms an abutment portion, the second extension cavity 9121c forms a hollow portion, and the first extension cavity 9111c forms a connecting portion. The extension wall 9122c abuts against the stop portion 81, and the extension wall 9122c can elastically deform toward the second extension cavity 9121c. The first extension cavity 9111c is defined to have a first longitudinal section along the width direction of the stop rod 31, and the second extension cavity 9121c has a second longitudinal section extending along the length direction of the stop rod 31. The first longitudinal section and the second longitudinal section are arranged perpendicularly. The relevant technical effects and functions have been described in detail in the first embodiment, and will not be repeated here.
[0029] This application provides an electronic expansion valve, including a slip ring 80 and a rotor assembly 30. The rotor assembly 30 includes a stop rod 31, and the slip ring 80 includes a stop portion 81. The stop portion 81 or the stop rod 31 is provided with a noise reduction portion 90. The noise reduction portion 90 includes a connecting portion 93, a hollow portion 94, and abutting portion 91. The hollow portion 94 is closer to the abutting portion 91 than the connecting portion 93. At least one of the stop portion 81 and the stop rod 31 is at least partially fixedly connected or limitedly connected to the connecting portion 93. The abutting portion 91 abuts against the other, and the abutting portion 91 can elastically deform toward the hollow portion 94.
[0030] This application improves the design of the noise reduction section by incorporating a connecting part 93, a hollow part 94, and a stop part 91. The hollow part 94 is closer to the stop part 91 than the connecting part 93. The stop part 81 abuts against the stop rod 31 via the noise reduction section 90. At least one of the stop part 81 and the stop rod 31 is at least partially fixedly or limitedly connected to the connecting part 93, and the stop part 91 abuts against the other. The stop part 91 can elastically deform towards the hollow part 94. The noise reduction section 90 has a reserved hollow deformation position, creating a buffer zone. During operation, the stop part abuts against the stop rod via the noise reduction section, which can dissipate vibration energy more quickly, reducing the vibration energy transmitted to the slip ring, thereby reducing vibration and mechanical noise, and better improving the noise problem.
[0031] The above description is merely an embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. An electronic expansion valve, characterized in that, The device includes a slip ring and a rotor assembly. The rotor assembly includes a stop bar. The slip ring includes a stop portion. The stop portion or the stop bar is provided with a noise reduction portion. The noise reduction portion includes a connecting portion, a hollow portion, and abutting portion. The hollow portion is closer to the abutting portion than the connecting portion. At least one of the stop portion and the stop bar is fixedly connected or limitedly connected to the connecting portion. The abutting portion abuts against the other and is capable of elastic deformation toward the hollow portion.
2. The electronic expansion valve according to claim 1, characterized in that, The noise reduction part includes a first noise reduction part, which includes an arc-shaped head, a first hole, and a second hole. The first hole and the second hole are spaced apart. The head forms the abutment part. The first hole forms the connecting part and is fixedly connected or limitedly connected to the stop part. The second hole forms the hollow part and is closer to the head than the first hole. The head abuts against the stop bar and can elastically deform toward the second hole.
3. An electronic expansion valve according to claim 2, characterized in that, The stop portion is defined to have a slip ring center, and the distance between the head and the slip ring center is 1mm-3mm. The first noise reduction portion includes a first tail portion, and the distance between the first tail portion and the slip ring center is 0.5mm-1mm.
4. An electronic expansion valve according to claim 1, characterized in that, The noise reduction part includes a second noise reduction part, which includes a body part and a thin wall extending from the body part. The thin wall has a flange forming a lip. The second noise reduction part includes a second hole and a cavity part. The cavity part is closer to the lip part than the second hole part. The lip part forms the abutment part. The inner cavity of the cavity part is connected to the opening of the lip part. The cavity part forms the hollow part. The second hole part is fixedly connected or limitedly connected to the stop part. The lip part abuts against the stop bar and can elastically deform toward the cavity part.
5. An electronic expansion valve according to claim 4, characterized in that, The stop portion is defined to have a slip ring center, and the distance between the lip portion and the slip ring center is 1mm-3mm. The second noise reduction portion includes a second tail portion, and the distance between the second tail portion and the slip ring center is 0.5mm-1mm.
6. An electronic expansion valve according to claim 1, characterized in that, The noise reduction section includes a third noise reduction section, which has a flat structure and includes a first extension and a second extension protruding from the first extension, with a step formed between the first extension and the second extension.
7. An electronic expansion valve according to claim 6, characterized in that, The first extension portion has a first extension cavity, which forms the connecting portion. The stop bar is at least partially located in the first extension cavity and is fixedly connected or limitedly connected. The second extension portion has a second extension cavity, which forms the hollow portion. The second extension portion includes an extension wall, which forms the abutment portion. The second extension cavity is closer to the extension wall than the first extension cavity. The extension wall abuts against the stop portion and can elastically deform toward the second extension cavity.
8. An electronic expansion valve according to claim 7, characterized in that, The first extension cavity is defined to have a first longitudinal section extending along the width direction of the stop bar, and the second extension cavity is defined to have a second longitudinal section extending along the length direction of the stop bar, wherein the first longitudinal section is perpendicular to the second longitudinal section.
9. An electronic expansion valve according to any one of claims 1-8, characterized in that, The noise reduction part is made of hydrogenated nitrile rubber with a hardness range of 70-80HA.
10. An electronic expansion valve according to any one of claims 1-8, characterized in that, The connecting part is connected to the stop or stop bar through a vulcanization process.