Electronic expansion valve and air conditioning system with same

Abstract

The utility model provides an electronic expansion valve and an air conditioning system with the electronic expansion valve, the electronic expansion valve comprises a valve body, the valve body is provided with a first communication port, a valve port and a second communication port, the first communication port is arranged on the side wall of the valve body, and the valve port is arranged between the first communication port and the second communication port; the silencing assembly is arranged at the first communication port, the silencing assembly comprises at least one porous part, the silencing assembly is provided with a flow guide structure, the flow guide structure is located on the side, close to the axis of the valve body, of the porous part, and the flow area of the flow guide structure is gradually increased in the direction, facing the axis of the valve body, of the porous part. According to the technical scheme, the problem that in the prior art, when an electronic expansion valve is used, large noise can be generated can be solved.

Description

Technical Field

[0001] This utility model relates to the field of electronic expansion valve technology, and more specifically, to an electronic expansion valve and an air conditioning system having the same. Background Technology

[0002] Currently, in air conditioning systems with dehumidification functions, two heat exchangers are sequentially connected on the indoor side, with an electronic expansion valve between them. When the air conditioning system is in dehumidification mode, one indoor heat exchanger acts as an evaporator, and the other acts as a condenser. Under dehumidification conditions, the refrigerant first flows into the condenser to release heat, and then passes through the electronic expansion valve for throttling and pressure reduction. The throttled and pressure-reduced refrigerant then enters the evaporator to absorb heat. A fan drives the humid indoor air through the evaporator, causing water vapor to condense and dehumidify. At the same time, the condenser raises the indoor air temperature, thus achieving dehumidification without cooling and improving the user experience.

[0003] During the operation of the aforementioned air conditioning system, even if the outdoor control valve is fully open, a certain pressure drop in the refrigerant will inevitably occur. Furthermore, due to factors such as short operating time or insufficient heat exchange area of ​​the heat exchanger, the subcooling of the refrigerant before entering the electronic expansion valve may be relatively small, resulting in a higher proportion of gaseous fluid in the refrigerant. Consequently, discontinuous bubbles are easily generated in the refrigerant. When the refrigerant passes through the electronic expansion valve for throttling, these discontinuous bubbles burst, generating significant noise and affecting the user experience of the electronic expansion valve.

[0004] In related technologies, in order to reduce the noise of refrigerant fluid flowing through the electronic expansion valve, a porous component is usually installed inside the electronic expansion valve to comb the refrigerant fluid. However, in order to comb the air bubbles in the fluid before entering the electronic expansion valve, placing the porous component in front of the valve will obstruct the fluid before it enters the valve chamber of the electronic expansion valve, thereby reducing the flow capacity of the electronic expansion valve. Utility Model Content

[0005] This invention provides an electronic expansion valve and an air conditioning system having the same, to solve the problem that electronic expansion valves in the prior art generate a lot of noise during use.

[0006] According to one aspect of the present invention, an electronic expansion valve is provided, comprising: a valve body having a first connecting port, a valve port, and a second connecting port, the first connecting port being disposed on a side wall of the valve body, and the valve port being disposed between the first connecting port and the second connecting port; and a silencing assembly disposed at the first connecting port, the silencing assembly including at least one porous element, the silencing assembly having a flow guiding structure located on the side of the porous element close to the axis of the valve body, and the flow area of ​​the flow guiding structure gradually increasing in the direction of the porous element toward the axis of the valve body.

[0007] Applying the technical solution of this utility model, when the electronic expansion valve is used as a dehumidification valve between two heat exchangers, the refrigerant fluid flows out from the condenser and into the valve body through the first connecting port. After the fluid is throttled and depressurized at the valve port, it flows to the evaporator through the second connecting port. By setting a silencing component including a porous element at the first connecting port, i.e., setting a silencing component before the valve, the porous element can refine the air bubbles in the refrigerant fluid, thereby reducing the noise generated by the collapse of discontinuous air bubbles of different sizes during throttling. At the same time, by setting a flow guiding structure on the side of the porous element close to the axis of the valve body, i.e., setting a flow guiding structure downstream of the porous element, the flow area of ​​the flow guiding structure gradually increases along the flow direction of the fluid. This can increase the flow area of ​​the fluid before it enters the valve chamber of the electronic expansion valve, thereby improving the flow capacity of the fluid after passing through the porous element and ensuring normal fluid flow.

[0008] Furthermore, the electronic expansion valve also includes a first connecting pipe, which is fixedly mounted on the valve body and connected to a first communication port, and a silencing component is fixedly mounted inside the first connecting pipe.

[0009] Furthermore, the silencing assembly has a connecting sleeve, with a porous component disposed within the connecting sleeve. The connecting sleeve has an interconnected mounting section and a flow guiding section. The flow guiding section is located on the side of the mounting section near the axis of the valve body. The mounting section is used to mount the porous component, and the flow guiding section forms a flow guiding structure. The inner diameter of the flow guiding section gradually increases in the direction away from the mounting section.

[0010] Furthermore, the guide section is a conical section with a cone angle of α, where 20°≤α≤80°.

[0011] Furthermore, the noise reduction assembly includes a first noise reduction block and a second noise reduction block spaced apart along the axial direction of the noise reduction assembly. The first noise reduction block has at least one first flow hole, and the second noise reduction block has at least one second flow hole. The projections of the first flow hole and the second flow hole in the axial direction do not coincide, or partially coincide.

[0012] Furthermore, the installation section includes a first mounting hole and a second mounting hole that are interconnected. The second mounting hole is located on the side of the first mounting hole away from the guide section. The inner diameter of the first mounting hole is larger than the inner diameter of the guide section near the first mounting hole. The inner diameter of the second mounting hole is larger than the inner diameter of the first mounting hole. A first noise-absorbing block is disposed in the first mounting hole, and the outer diameter of the first noise-absorbing block is adapted to the inner diameter of the first mounting hole. A second noise-absorbing block is disposed in the second mounting hole, and the outer diameter of the second noise-absorbing block is adapted to the inner diameter of the second mounting hole.

[0013] Furthermore, the outer wall of the installation section on the side opposite to the guide section is riveted and limited to the porous component.

[0014] Furthermore, the connecting sleeve is press-fitted into the first connecting pipe. The connecting sleeve has a guide section and a mating section that are connected to each other. The outer diameter of the guide section is smaller than the outer diameter of the mating section, and the mating section is press-fitted with the first connecting pipe.

[0015] Furthermore, the end face of the connecting sleeve is coplanar with the end face of the first connecting pipe that is fixedly connected to the valve body.

[0016] Furthermore, the first connecting tube has a limiting structure to restrict the displacement of the connecting sleeve within the first connecting tube.

[0017] Furthermore, the first connecting pipe has a first pipe section and a second pipe section that are interconnected, a connecting sleeve is disposed in the first pipe section, and the inner diameter of the second pipe section gradually decreases along the side away from the first pipe section, forming a limiting structure.

[0018] Furthermore, a limiting protrusion is provided on the side wall of the first connecting pipe, and the limiting protrusion is positioned facing the axis of the first connecting pipe, forming a limiting structure.

[0019] Furthermore, the limiting protrusion forms an annular receiving groove on the outer side wall of the first connecting pipe, the receiving groove being used to place the welding ring.

[0020] Furthermore, a perforated component is also provided at the second connecting port.

[0021] According to another aspect of this utility model, an air conditioning system is provided, comprising a compressor, an indoor heat exchanger, and an outdoor heat exchanger connected to each other. The indoor heat exchanger includes a first heat exchanger and a second heat exchanger, and an electronic expansion valve is provided between the first heat exchanger and the second heat exchanger. The electronic expansion valve is the aforementioned electronic expansion valve. By applying the aforementioned electronic expansion valve to the air conditioning system provided in this application, the noise of the electronic expansion valve during use can be reduced, thereby reducing the overall noise of the air conditioning system during use. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0023] Figure 1 A schematic diagram of the structure of the electronic expansion valve provided by this utility model is shown;

[0024] Figure 2 This invention provides a schematic diagram showing the structure of the silencing component and the first connecting pipe in conjunction.

[0025] Figure 3 A schematic diagram of the structure of the noise reduction assembly provided by this utility model is shown;

[0026] Figure 4 A schematic diagram of the connecting sleeve provided by this utility model is shown;

[0027] Figure 5 A schematic diagram of the air conditioning system provided by this utility model is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Valve body; 11. First connecting port; 12. Valve port; 13. Second connecting port;

[0030] 20. Silencing assembly; 21. Connecting sleeve; 211. Mounting section; 2111. First mounting hole; 2112. Second mounting hole; 212. Flow guide section; 213. Guide section; 214. Mating section; 23. First silencer block; 231. First flow hole; 24. Second silencer block; 241. Second flow hole; 25. Washer;

[0031] 30. First connecting pipe; 31. First pipe section; 32. Second pipe section;

[0032] 40. Second connecting pipe;

[0033] 100. Compressor; 200. Indoor heat exchanger; 210. First heat exchanger; 220. Second heat exchanger; 300. Outdoor heat exchanger; 400. Electronic expansion valve. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0035] like Figures 1 to 4As shown, this embodiment of the present invention provides an electronic expansion valve, which includes a valve body 10 and a silencing assembly 20. The valve body 10 has a first connecting port 11, a valve port 12, and a second connecting port 13. The first connecting port 11 is disposed on the side wall of the valve body 10, and the valve port 12 is disposed between the first connecting port 11 and the second connecting port 13. The silencing assembly 20 is disposed at the first connecting port 11 and includes at least one porous element. The silencing assembly 20 has a flow guiding structure located on the side of the porous element near the axis of the valve body 10. The flow area of ​​the flow guiding structure gradually increases in the direction from the porous element toward the axis of the valve body 10.

[0036] When the electronic expansion valve is used as a dehumidification valve between two heat exchangers, the refrigerant fluid flows out from the condenser and into the valve body 10 through the first connecting port 11. After the fluid is throttled and depressurized through the valve port 12, it flows to the evaporator through the second connecting port 13. By setting a silencing component 20 including a porous component at the first connecting port 11, that is, setting a silencing component 20 in front of the valve, the porous component can sort and refine the air bubbles in the refrigerant fluid, thereby reducing the noise generated by the collapse of discontinuous air bubbles of different sizes during throttling. Meanwhile, by setting a flow guiding structure on the side of the porous component near the axis of the valve body 10, that is, setting a flow guiding structure downstream of the porous component, the flow area of ​​the flow guiding structure gradually increases along the flow direction of the fluid. This can increase the flow area of ​​the fluid before it enters the valve chamber of the electronic expansion valve, preventing the porous component from inevitably affecting the flow capacity of the electronic expansion valve to a certain extent after the fluid passes through it. At the same time, the fluid passing through the porous component directly enters the valve body 10 and is blocked by the parts inside the valve body 10, thereby improving the flow capacity of the fluid after passing through the porous component and ensuring the normal flow of the fluid.

[0037] Specifically, in this application, the electronic expansion valve further includes a first connecting pipe 30, which is fixedly mounted on the valve body 10 and communicates with the first communication port 11. A silencing component 20 is fixedly mounted inside the first connecting pipe 30. Since the valve cavity of the electronic expansion valve also contains other components such as a valve needle, by mounting the silencing component 20 inside the first connecting pipe 30 as described above, the volume of the valve cavity can be further guaranteed, preventing the silencing component 20 from being mounted on the valve body 10 and thus affecting fluid flow.

[0038] Specifically, the muffler assembly 20 has a connecting sleeve 21, and a perforated component is disposed within the connecting sleeve 21. When multiple perforated components are provided, all of them can be disposed within the connecting sleeve 21, thus enabling the muffler assembly 20 to be installed off-line, forming an independent component. When processing the electronic expansion valve, the operator can process the muffler assembly 20 separately off-line and then install it into the first connecting pipe 30 to complete the installation. This setup helps to reduce production cycle time, improve parts standardization, reduce the complexity of parts turnover, and improve the processing and installation efficiency of the electronic expansion valve.

[0039] like Figures 3 to 4 As shown, in some feasible embodiments of this application, the connecting sleeve 21 has an interconnected mounting section 211 and a flow guiding section 212. The flow guiding section 212 is located on the side of the mounting section 211 near the axis of the valve body 10. The mounting section 211 is used to mount the porous component, and the flow guiding section 212 forms a flow guiding structure. The inner diameter of the flow guiding section 212 gradually increases in the direction away from the mounting section 211. With the above configuration, the flow guiding section 212 formed by the connecting sleeve 21 can form a flow guiding structure to guide the refrigerant fluid without the need for additional parts, reducing the complexity of the muffler assembly 20 and the number of required parts, reducing the assembly difficulty of the muffler assembly 20, and helping to reduce the complexity of the electronic expansion valve.

[0040] In this application, the flow guiding section 212 can be a conical section or an arc section, as long as it can meet the requirements for guiding the fluid.

[0041] Specifically, when the guide section 212 is a conical section, the cone angle of the guide section 212 is α, where 20°≤α≤80°. When the cone angle of the guide section 212 is less than 20°, the cone angle of the guide section 212 is too small, resulting in poor fluid guiding effect and an inability to effectively guide the fluid. The change in fluid flow area is small, and it cannot effectively increase the fluid flow area. When the cone angle of the guide section 212 is greater than 80°, the cone angle of the guide section 212 is too large, leading to an excessively thin wall thickness of the connecting sleeve 21, which affects the design strength of the connecting sleeve 21. In this application, by setting the cone angle of the guide section 212 between 20° and 80°, the guiding and buffering effects of the guide section 212 can be guaranteed. Specifically, the cone angle α of the guide section 212 can be set to 20°, 30°, 50°, or 80°.

[0042] In a specific embodiment of this application, the noise reduction component 20 includes a first noise reduction block 23 and a second noise reduction block 24 spaced apart along the axial direction of the noise reduction component 20. The first noise reduction block 23 has at least one first flow hole 231, and the second noise reduction block 24 is provided with at least one second flow hole 241. The projections of the first flow hole 231 and the second flow hole 241 in the axial direction do not coincide, or partially coincide. With the above configuration, large air bubbles in the fluid mixed with impurities can be broken down into smaller air bubbles by the porous structure in the first silencer block 23 and the second silencer block 24, thereby reducing the abnormal noise generated by unstable and discontinuous large air bubbles during flow. Furthermore, by setting the first silencer block 23 and the second silencer block 24 to be spaced apart, and setting the first flow hole 231 and the second flow hole 241 to overlap at most partially in the axial direction, when the fluid flows through the first silencer block 23 and the second silencer block 24, impurities in the fluid that cannot pass through the first silencer block 23 and the second silencer block 24 can flow through the first flow hole 231 and the second flow hole 241, preventing the first silencer block 23 and the second silencer block 24 from becoming clogged.

[0043] Specifically, in this application, the first silencing block 23 and the second silencing block 24 can be filter screen sintered blocks. The filter screen sintered blocks are woven from metal wires or alloy wires, and then the metal wires or alloy wires are sintered together by high temperature heating to form a uniform block filter material with high strength and stability, which can effectively achieve the filtering effect.

[0044] Reference Figure 4 As shown, the mounting section 211 includes a first mounting hole 2111 and a second mounting hole 2112 that are interconnected. A first noise-absorbing block 23 is disposed in the first mounting hole 2111, and a second noise-absorbing block 24 is disposed in the second mounting hole 2112. The second mounting hole 2112 is located on the side of the first mounting hole 2111 that is away from the guide section 212. The inner diameter of the first mounting hole 2111 is larger than the minimum inner diameter of the guide section 212 near the end of the first mounting hole 2111. A first stepped surface can be formed between the first mounting hole 2111 and the guide section 212 to limit the displacement of the first noise-absorbing block 23. The inner diameter of the second mounting hole 2112 is larger than the inner diameter of the first mounting hole 2111. A second stepped surface can be formed between the second mounting hole 2112 and the first mounting hole 2111 to limit the displacement of the second noise-absorbing block 24.

[0045] Specifically, a straight section can be provided between the guide section 212 and the first mounting hole 2111, and a stepped surface can be formed between the port of the straight section and the port of the first mounting hole 2111. This can enhance the structural strength of the side wall of the guide section 212 and prevent the guide section 212 from deforming due to the pressure of the first noise-absorbing block 23.

[0046] Furthermore, the outer diameter of the first muffler block 23 is adapted to the inner diameter of the first mounting hole 2111, and the outer diameter of the second muffler block 24 is adapted to the inner diameter of the second mounting hole 2112. This arrangement facilitates the differentiation between the first muffler block 23 and the second muffler block 24, avoids incorrect installation sequence, prevents confusion in the installation positions of the two mufflers, and improves the installation efficiency of the muffler assembly 20.

[0047] In a specific embodiment of this application, the noise reduction component 20 further includes a washer 25, which is disposed between the first noise reduction block 23 and the second noise reduction block 24 and is located in the second mounting hole 2112 to separate the first noise reduction block 23 and the second noise reduction block 24.

[0048] Specifically, the thickness of the first noise-absorbing block 23 provided in this application is greater than the thickness of the first mounting hole 2111. With this configuration, when the washer 25 is installed between the first noise-absorbing block 23 and the second noise-absorbing block 24, the washer 25 can ensure that it will not contact the second stepped surface, but can stably abut against the first noise-absorbing block 23, ensuring that the first noise-absorbing block 23 can be stably installed in the first mounting hole 2111.

[0049] In this application, the outer wall of the installation section 211 facing away from the guide section 212 is riveted and limited to the porous component. This arrangement facilitates the fixing of the first muffler block 23 and the second muffler block 24 and prevents the first muffler block 23 and the second muffler block 24 from detaching from the connecting sleeve 21.

[0050] Furthermore, the connecting sleeve 21 is press-fitted into the first connecting pipe 30 to ensure the stability of the connecting sleeve 21 within the first connecting pipe 30. The connecting sleeve 21 has a guide section 213 and a mating section 214 connected to each other. The outer diameter of the guide section 213 is smaller than the outer diameter of the mating section 214, and the mating section 214 is press-fitted into the first connecting pipe 30. With the above arrangement, when the muffler assembly 20 is installed and mated with the first connecting pipe 30, the muffler assembly 20 can align the guide section 213 towards the port of the first connecting pipe 30, facilitating the alignment and entry of the muffler assembly 20 into the first connecting pipe 30. After the guide section 213 enters the first connecting pipe 30, the mating section 214 then enters the first connecting pipe 30, so that the connecting sleeve 21 can be press-fitted into the first connecting pipe 30, completing the installation of the muffler assembly 20.

[0051] Specifically, this application sets the end face of the connecting sleeve 21 to be coplanar with the end face of the first connecting pipe 30 that is fixedly connected to the valve body 10. This allows it to determine whether the muffler assembly 20 can be installed in place, providing a positioning reference for the installation of the muffler assembly 20 and facilitating its installation.

[0052] Furthermore, the first connecting pipe 30 has a limiting structure to restrict the displacement of the connecting sleeve 21 within the first connecting pipe 30. Through this design, the limiting structure prevents excessive displacement of the muffler assembly 20 within the first connecting pipe 30, ensuring that the muffler assembly 20 does not excessively enter the first connecting pipe 30, thus ensuring the accuracy of component installation.

[0053] In some feasible embodiments of this application, the first connecting pipe 30 has a first pipe section 31 and a second pipe section 32 that are interconnected. The connecting sleeve 21 is disposed inside the first pipe section 31. The inner diameter of the second pipe section 32 gradually decreases along the side away from the first pipe section 31, and the second pipe section 32 forms a limiting structure. With this configuration, the silencing component 20 can be limited by the inner wall of the second pipe section 32, providing a positioning reference for the installation of the silencing component 20 and ensuring the accuracy of the installation position of the silencing component 20.

[0054] In some feasible embodiments of this application, a limiting protrusion is provided on the side wall of the first connecting pipe 30, and the limiting protrusion is positioned facing the axis of the first connecting pipe 30, forming a limiting structure. With this configuration, the limiting protrusion can be formed in the inner wall of the first connecting pipe 30 to compress the silencing component 20, fixing the silencing component 20 inside the first connecting pipe 30 and preventing the silencing component 20 from falling off.

[0055] Specifically, the limiting protrusions can be formed by dotting or spinning. When the limiting protrusions are formed by dotting, multiple limiting protrusions can be arranged in a ring at intervals. When the limiting protrusions are formed by spinning, the limiting protrusions have a ring structure.

[0056] Furthermore, the limiting protrusion formed by spinning can form an annular receiving groove on the outer side wall of the first connecting pipe 30. The receiving groove is used to place the welding ring so as to integrate the first connecting pipe 30 and the valve body 10.

[0057] In a preferred embodiment of this application, the limiting protrusion and the mating section 214 are correspondingly mated, that is, the mating section 214 and the limiting protrusion are interference-fitted, which improves the stability of the muffler assembly 20 installed in the first connecting pipe 30.

[0058] Furthermore, a porous component can be provided at the second connecting port 13 to further refine the fluid flowing out of the valve port 12. When the fluid flows in the reverse direction, that is, flows through the second connecting port 13 to the first connecting port 11, the silencing component provided at the second connecting port 13 is located in front of the valve. The porous component can also decompose large air bubbles in the fluid in front of the valve and before the fluid passes through the valve port 12, preventing the air bubbles from bursting and generating large noise when the fluid passes through the valve port 12, further reducing the operating noise of the electronic expansion valve and improving the user experience of the electronic expansion valve.

[0059] Specifically, in this application, the electronic expansion valve also includes a second connecting pipe 40, which is disposed at the second communication port 13. When a perforated component is provided at the second communication port 13, the perforated component can be disposed between the valve body 10 and the second connecting pipe 40, such as inside the valve body 10 or inside the second connecting pipe 40.

[0060] like Figure 1 As shown, a connection structure is provided between the valve body 10 and the second connecting pipe 40, and a porous component is provided inside the connection structure.

[0061] Reference Figure 5 As shown in the embodiments of this application, an air conditioning system is also provided. The air conditioning system includes a compressor 100, an indoor heat exchanger 200, and an outdoor heat exchanger 300 that are interconnected. The indoor heat exchanger 200 includes a first heat exchanger 210 and a second heat exchanger 220. An electronic expansion valve 400 is provided between the first heat exchanger 210 and the second heat exchanger 220. The electronic expansion valve 400 is the aforementioned electronic expansion valve. With the above configuration, when the air conditioning system is in cooling or heating mode, the electronic expansion valve 400 is fully open, and the valve port 12 does not throttle the refrigerant fluid. The first heat exchanger 210 and the second heat exchanger 220 can be regarded as a whole heat exchanger for releasing or absorbing heat.

[0062] When the air conditioning system is in dehumidification mode, the second heat exchanger 220 acts as a condenser. The refrigerant fluid releases heat as it passes through the second heat exchanger 220. After flowing out of the second heat exchanger 220, the refrigerant fluid flows into the electronic expansion valve 400 through the first connecting pipe 30. The electronic expansion valve 400 controls the flow rate of the refrigerant fluid, allowing it to pass through the electronic expansion valve 400 at a smaller flow rate for throttling and pressure reduction. The first heat exchanger 210 acts as an evaporator to absorb heat. The fan drives the humid indoor air through the heat-absorbing first heat exchanger 210, causing water vapor to condense and achieve a dehumidification effect. The indoor second heat exchanger 220 acts as a condenser, raising the indoor air temperature. That is, the air condenses and dehumidifies as it passes through the first heat exchanger 210, and then warms up as it passes through the second heat exchanger 220. This cycle continues under the action of the fan, achieving a dehumidification effect without cooling down, thus improving the user experience. This application utilizes a silencing component 20 installed within the first connecting pipe 30. The silencing component 20 can comb through and break down air bubbles in the fluid, reducing the noise of the fluid when it passes through the electronic expansion valve 400 for throttling, thus ensuring the performance of the air conditioning system.

[0063] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0065] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0066] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0067] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0068] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An electronic expansion valve characterized by, The electronic expansion valve comprises: a valve body (10) having a first communication port (11), a valve port (12) and a second communication port (13), the first communication port (11) being arranged on a side wall of the valve body (10), the valve port (12) being arranged between the first communication port (11) and the second communication port (13); a sound attenuation assembly (20) arranged at the first communication port (11), the sound attenuation assembly (20) comprising at least one porous member, the sound attenuation assembly (20) having a flow guide structure located on a side of the porous member close to an axis of the valve body (10), the flow guide structure gradually increasing in flow area in a direction of the axis of the valve body (10).

2. The electronic expansion valve according to claim 1, characterized in that The electronic expansion valve further comprises a first connecting pipe (30) fixedly arranged on the valve body (10) and in communication with the first communication port (11), the sound attenuation assembly (20) being fixedly arranged in the first connecting pipe (30).

3. The electronic expansion valve according to claim 2, wherein The sound attenuation assembly (20) has a connecting sleeve (21) in which the porous member is arranged, the connecting sleeve (21) having a mounting section (211) and a flow guide section (212) in communication with each other, the flow guide section (212) being located on a side of the mounting section (211) close to the axis of the valve body (10), the mounting section (211) being used for mounting the porous member, the flow guide section (212) forming the flow guide structure, an inner diameter of the flow guide section (212) gradually increasing in a direction away from the mounting section (211).

4. The electronic expansion valve according to claim 3, characterized in that The flow guide section (212) is a conical section, a taper angle of the conical section being α, 20°≤α≤80°.

5. The electronic expansion valve according to claim 3, wherein The sound attenuation assembly (20) comprises a first sound attenuation block (23) and a second sound attenuation block (24) arranged axially spaced apart, the first sound attenuation block (23) having at least one first flow-through hole (231), the second sound attenuation block (24) being provided with at least one second flow-through hole (241), projections of the first flow-through hole (231) and the second flow-through hole (241) in an axial direction not overlapping, or partially overlapping.

6. The electronic expansion valve according to claim 5, wherein The mounting section (211) comprises a first mounting hole (2111) and a second mounting hole (2112) in communication with each other, the second mounting hole (2112) is located on the side of the first mounting hole (2111) away from the flow guide section (212), the inner diameter of the first mounting hole (2111) is larger than the inner diameter of the end of the flow guide section (212) close to the first mounting hole (2111), the inner diameter of the second mounting hole (2112) is larger than the inner diameter of the first mounting hole (2111), the first sound attenuation block (23) is arranged in the first mounting hole (2111), and the outer diameter of the first sound attenuation block (23) is matched with the inner diameter of the first mounting hole (2111); the second sound attenuation block (24) is arranged in the second mounting hole (2112), and the outer diameter of the second sound attenuation block (24) is matched with the inner diameter of the second mounting hole (2112).

7. The electronic expansion valve according to claim 3, wherein The outer side wall of the mounting section (211) away from the flow guide section (212) is riveted and limited with the porous part.

8. The electronic expansion valve according to claim 3, wherein The connecting sleeve (21) is interference press-fitted in the first connecting pipe (30), the connecting sleeve (21) has a guide section (213) and a matching section (214) connected with each other, the outer diameter of the guide section (213) is smaller than the outer diameter of the matching section (214), and the matching section (214) is interference-fitted with the first connecting pipe (30).

9. The electronic expansion valve according to claim 8, characterized in that The end face of the connecting sleeve (21) is coplanar with the end face of one end of the first connecting pipe (30) and the valve body (10) fixedly connected.

10. The electronic expansion valve according to claim 8, wherein The first connecting pipe (30) has a limiting structure to limit the displacement of the connecting sleeve (21) in the first connecting pipe (30).

11. The electronic expansion valve according to claim 10, wherein The first connecting pipe (30) has a first pipe section (31) and a second pipe section (32) in communication with each other, the connecting sleeve (21) is arranged in the first pipe section (31), the inner diameter of the second pipe section (32) gradually decreases along the side away from the first pipe section (31), and the second pipe section (32) forms the limiting structure.

12. The electronic expansion valve according to claim 10, wherein The limiting structure is formed on the side wall of the first connecting pipe (30).

13. The electronic expansion valve according to claim 12, wherein The limiting structure is formed on the side wall of the first connecting pipe (30).

14. The electronic expansion valve of claim 1, wherein, The limiting structure is formed on the side wall of the first connecting pipe (30).

15. An air conditioning system comprising: The second communication port (13) is also provided with a porous part. The air conditioning system comprises a compressor (100), an indoor heat exchanger (200) and an outdoor heat exchanger (300) in communication with each other, the indoor heat exchanger (200) comprises a first heat exchanger (210) and a second heat exchanger (220), an electronic expansion valve (400) is arranged between the first heat exchanger (210) and the second heat exchanger (220), and the electronic expansion valve (400) is the electronic expansion valve in any one of claims 1 to 14.

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