Silencing assembly and valve device

Abstract

According to the silencing assembly and the valve device, on the premise that noise is improved, the certain foreign matter and impurity passing capacity is achieved, and the certain anti-blocking function is achieved. The silencing assembly comprises a first silencing block and a lining, the first silencing block is arranged in the lining in a limiting mode, the first silencing block is provided with a first silencing hole and a plurality of first via holes, the first via holes penetrate through the first silencing block in the first direction, and the first silencing block is provided with a second silencing hole. At least part of the first via holes are notches formed in the periphery of the first silencing block, the hole diameter of the first via holes is larger than that of the first silencing holes, and the inner wall of the lining is limited to be in contact with the peripheral wall of the second silencing block.

Description

Technical Field

[0001] This application relates to the field of noise reduction technology, specifically to a noise reduction component and valve device. Background Art

[0002] During system operation, due to insufficient subcooling before the valve or other reasons, the refrigerant flowing into the expansion valve may contain gaseous refrigerant (bubbles). When this refrigerant flows through the inside of the expansion valve, the bubbles will burst due to the collision between the refrigerant and the components, as well as the throttling and pressure reduction at the valve port. This will generate noise from the bursting of bubbles inside the expansion valve, and the noise may even be amplified through the pipeline, affecting the ride comfort of passengers and drivers. Utility Model Content

[0003] The purpose of this application is to provide a noise reduction component and valve device that, while improving noise levels, also has a certain ability to allow foreign matter and impurities to pass through, and has a certain anti-clogging function.

[0004] To solve the above-mentioned technical problems, this application provides a noise reduction component, including a first noise reduction block and a bushing. The first noise reduction block is positioned within the bushing. The first noise reduction block has a first noise reduction hole and a plurality of first through holes. The first through holes penetrate the first noise reduction block along a first direction, and at least a portion of the first through holes are notches disposed on the outer periphery of the first noise reduction block. The diameter of the first through holes is larger than the diameter of the first noise reduction hole. The inner wall of the bushing is in contact with the outer peripheral wall of the second noise reduction block.

[0005] The silencing component in this application includes a first silencing block, which has both a first silencing hole for silencing and a first through hole with a relatively large aperture. At least a portion of the first through holes are notches located on the outer periphery of the first silencing block. When the inner wall of the bushing is in contact with the outer peripheral wall of the second silencing block, the inner wall of the bushing closes the notches on the outer periphery of the first silencing block to form a fluid channel. When the cold medium passes through the position of the first silencing block corresponding to the silencing component, it can be silenced through the first silencing hole of the first silencing block. When there are foreign impurities in the cold medium, the foreign impurities can flow out through the first through hole to avoid clogging the first silencing hole with a smaller aperture of the first silencing block.

[0006] This application also provides a valve device having a first channel portion, a second channel portion, and a valve port portion, wherein the first channel portion and the second channel portion are connected through the valve port portion. The valve device further includes a silencing component as described in any one of the preceding claims, wherein the silencing component is disposed at least one of the first channel portion, the second channel portion, and the valve port portion. This valve device also has the same technical effect as the aforementioned silencing component. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the valve device in one embodiment of this application;

[0008] Figure 2 for Figure 1 Front view of the central valve assembly;

[0009] Figure 3 for Figure 2 A cross-sectional view of the central valve device along the AA direction;

[0010] Figure 4 for Figure 3 Enlarged diagram of part B in the middle;

[0011] Figure 5 for Figure 4 Schematic diagram of the structure of the middle noise reduction component;

[0012] Figure 6 for Figure 5 Cross-sectional view of the middle muffler assembly along the CC direction;

[0013] Figure 7 for Figure 4 A top-down view;

[0014] Figure 8 for Figure 6 A schematic diagram of the structure of the second muffler block, viewed from above;

[0015] Figure 9 for Figure 8 Left view of the second muffler block;

[0016] Figure 10 for Figure 8 A bottom view of the second muffler block;

[0017] Figure 11 for Figure 8 A cross-sectional view of the second muffler block along the DD direction;

[0018] Figure 12 for Figure 6 A schematic diagram of the structure of the first sound-absorbing block, viewed from above;

[0019] Figure 13 for Figure 12 A cross-sectional view of the first noise-absorbing block along the EE direction;

[0020] Figure 14 for Figure 12 Left view of the first muffler block;

[0021] Figure 15 for Figure 6 Schematic diagram of the middle bushing;

[0022] Figure 16 This is a schematic diagram of a valve device with a silencing component in another embodiment of this application.

[0023] The following are the descriptions of the reference numerals:

[0024] 10-Valve device;

[0025] 101 - Valve stem;

[0026] 102 - Valve core;

[0027] 103-Control Department;

[0028] 104 - Spring;

[0029] 105 - Valve body; 1051 - Stepped wall;

[0030] 106-Silencer assembly; 1061-Second silencer block; 1061a-Second through hole; 1061b-Second silencer hole; 1062-First silencer block; 1062a-First through hole; 1062b-First silencer hole; 1063-Bushing; 1063a-Inner hole; 1063a1-Large hole; 1063a2-Small hole; 10631-Large diameter sleeve; 10632-Small diameter sleeve; 10633-Limiting flange; 10633a-Fluid hole; 10634-First stepped surface; 10635-Second stepped surface; 10636-Straight cylindrical wall section;

[0031] 107-Gasket;

[0032] 10a - First channel section; 10b - Second channel section; 10c - Valve port section. DETAILED DESCRIPTION

[0033] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. In the embodiments of this application, the terms "first" and "second" are used only to distinguish the same or similar features, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0034] In related technical solutions, a filter structure is installed on the pipeline before the valve to improve noise. However, if the pore size of the filter structure is too large, it will not play a role in noise reduction; if the pore size is too small, it will severely throttle the flow and reduce the system flow. Moreover, during the operation of the entire system, all foreign objects and impurities will accumulate in the filter structure. Over time, they will block the filter structure and affect the normal flow of refrigerant. In more serious cases, they may even block it completely, affecting the normal cooling of the air conditioner. Therefore, the filter structure needs to be replaced regularly.

[0035] Please refer to Figures 1 to 3 , Figure 1This is a schematic diagram of the valve device 10 in one embodiment of this application; Figure 2 for Figure 1 Front view of the central valve device 10; Figure 3 for Figure 2 A cross-sectional view of the central valve device 10 along the AA direction.

[0036] To improve the above problems, this embodiment provides a valve device 10, which is used in... Figures 1 to 3 Specifically, it is a thermostatic expansion valve. The valve device 10 includes a valve body 105, a valve stem 101, and a valve core 102. The valve body 105 has a first channel portion 10a and a second channel portion 10b. The valve body 105 also has a valve port portion 10c. The valve stem 101 can move along the axial direction to drive the valve core 102 to move, thereby opening or blocking the valve port portion 10c. When the valve port portion 10c is open, the first channel portion 10a and the second channel portion 10b are connected to each other. When the valve port portion 10c is closed, the first channel portion 10a and the second channel portion 10b are disconnected.

[0037] Valve assembly 10 also includes a control unit 103, which is used to control the axial movement of valve stem 101 as needed. Specifically, for a thermostatic expansion valve, the control unit 103 is... Figure 3 The temperature sensing bulb shown can work in conjunction with the spring 104 to control the movement of the valve stem 101. It is understood that when the valve device 10 is of other types, the control unit 103 can also have other structures accordingly. For example, if the valve device 10 is an electric valve, such as an electric expansion valve, then the control unit 103 may include a stator coil structure, etc., which will not be discussed further.

[0038] like Figure 4 As shown, Figure 4 for Figure 3 Enlarged diagram of part B in the middle.

[0039] The valve device 10 in this embodiment also includes a noise reduction component 106, which is disposed within the first channel portion 10a. Taking the refrigerant entering from the first channel portion 10a and flowing out from the second channel portion 10b as an example, the refrigerant passes through the noise reduction component 106 before entering the valve port portion 10c and the second channel portion 10b. As described in the background art, when gaseous media are mixed in with the refrigerant, noise is generated by the collision of the refrigerant inside the valve body 105, or by the rupture of the gaseous refrigerant after throttling at the valve port portion 10c. By first passing through the noise reduction component 106 in the first channel portion 10a for noise reduction, the aforementioned noise can be reduced, improving the comfort of passengers.

[0040] The specific structure of the noise reduction component 106 in this embodiment can be referred to Figures 5 to 7 understand, Figure 5 for Figure 4 Schematic diagram of the structure of the middle noise reduction component 106; Figure 6 for Figure 5 Cross-sectional view of the middle noise reduction assembly 106 along the CC direction; Figure 7 for Figure 4 A top-down view.

[0041] like Figure 6 As shown, the silencing component 106 in this embodiment includes a second silencing block 1061 and a first silencing block 1062 sequentially distributed along a first direction. When assembled into the valve device 10, the first direction in which the second silencing block 1061 and the first silencing block 1062 are distributed is also the flow direction of the refrigerant, ensuring that the refrigerant passes through the second silencing block 1061 and the first silencing block 1062 sequentially. The second silencing block 1061 has multiple second silencing holes 1061b, and the first silencing block 1062 has multiple first silencing holes 1062b. By controlling the size of the second silencing holes 1061b and the first silencing holes 1062b, the gaseous refrigerant can flow uniformly when passing through the silencing holes, reducing noise generated by collisions. The second silencing block 1061 and the first silencing block 1062 can be composed of filter screens, such as a multi-layered filter screen structure. The silencing holes are the mesh openings of the filter screen, and the mesh openings can be set to be relatively fine.

[0042] In addition, if Figures 8 to 11 As shown, Figure 8 for Figure 6 A schematic diagram of the structure of the second noise-absorbing block 1061, shown from a top-down view; Figure 9 for Figure 8 Left view of the second muffler block 1061; Figure 10 for Figure 8 A bottom view of the second muffler block 1061; Figure 11 for Figure 8 A cross-sectional view of the second noise-absorbing block 1061 along the DD direction.

[0043] In this embodiment, the second silencing block 1061 also has a second through hole 1061a, which extends through the second silencing block 1061 along a first direction. In this embodiment, the second through hole 1061a can be located approximately in the middle of the second silencing block 1061. The diameter of the second through hole 1061a is larger than the diameter of the second silencing hole 1061b, which has a relatively smaller diameter and mainly serves to reduce noise. The basic principle is that when the cold medium passes through the second silencing block 1061, the mesh of the second silencing block 1061 can break up the air bubbles contained in the liquid cold medium, and the liquid cold medium flows along the second silencing hole 1061b. The diameter of the second through hole 1061a is set to be larger to allow the cold medium and foreign impurities in the cold medium to pass through.

[0044] You can continue to refer to this. Figures 12 to 14 understand, Figure 12 for Figure 6 A schematic diagram of the structure of the first noise-absorbing block 1062, shown from a top-down perspective; Figure 13 for Figure 12 A cross-sectional view of the first noise-absorbing block 1062 along the EE direction; Figure 14 for Figure 12 Left view of the first muffler block 1062.

[0045] The silencing structure principle of the first silencing block 1062 is the same as that of the second silencing block 1061. The first silencing block 1062 has a first through hole 1062a. The diameter of the first through hole 1062a is larger than the diameter of the first silencing hole 1062b. Similarly, setting the diameter of the first through hole 1062a to be larger also allows the passage of the cold medium and foreign impurities in the cold medium. Figure 12 In this embodiment, multiple first through holes 1062a are provided and distributed along the circumference of the first noise-absorbing block 1062. At least a portion of the first through holes 1062a can be notches extending from the outer periphery of the first noise-absorbing block 1062 into the interior of the first noise-absorbing block 1062. In this embodiment, both the second noise-absorbing block 1061 and the first noise-absorbing block 1062 are cylindrical structures, that is, when projected along the first direction, the projections of both are circular.

[0046] At the same time, such as Figure 6 As shown, the second silencing block 1061 and the first silencing block 1062 have a distance H between them in the first direction. Thus, when the cooling medium flows along the first direction, it first passes through the second silencing block 1061 for silencing, and then flows to the first silencing block 1062 for secondary silencing. By setting two silencing stages, a better silencing effect can be achieved. The silencing hole diameters of the second silencing block 1061 and the first silencing block 1062 can be set to be the same or different. For example, the diameter of the second silencing hole 1061b can be greater than or equal to the diameter of the first silencing hole 1062b, thereby achieving progressive silencing. Furthermore, when foreign matter or impurities are present in the cooling medium, these impurities can enter the space between the second silencing block 1061 and the first silencing block 1062 through the second through-hole 1061a, and then flow out through the first through-hole 1062a of the first silencing block 1062. This prevents the foreign matter or impurities from clogging the smaller diameter holes of the second silencing block 1061 and the first silencing hole 1062b. Here, the second silencing block 1061 and the first silencing block 1062 are spaced apart by a distance H in the first direction, forming a cavity between them. This allows the cooling medium to be mixed again in this cavity after flowing out of the second silencing block 1061, and then flow back to the first silencing block 1062, resulting in a better silencing effect.

[0047] In this embodiment, the second muffler block 1061 and the first muffler block 1062 are coaxially arranged, with the axis parallel to the first direction. At this time, the second through hole 1061a can be set in the middle of the second muffler block 1061, while the first through hole 1062a is set off from the middle of the first muffler block 1062. With this configuration, the projections of the first through-hole 1062a and the second through-hole 1061a along the first direction can be at least partially offset. In this way, after the refrigerant carrying foreign matter and impurities passes directly through the second through-hole 1061a and enters the cavity between the second silencing block 1061 and the first silencing block 1062, it can no longer flow along the extension direction of the second through-hole 1061a, but can flow towards the first through-hole 1062a in a direction away from the center. During the flow, the refrigerant will also flow towards the first silencing hole 1062b of the first silencing block 1062, so that more of the refrigerant in the second silencing block 1061 that has not been silenced by the second silencing hole 1061b flows towards the first silencing hole 1062b for silencing, and can also enhance the mixing of the refrigerant, which is beneficial to further reduce the noise of the gaseous refrigerant.

[0048] like Figure 12 As shown, the first silencing block 1062 is provided with a plurality of first through holes 1062a. The plurality of first through holes 1062a are evenly arranged along the circumference of the first silencing block 1062. In this way, after the cold medium flows out from the second through hole 1061a, it will flow relatively evenly to the surrounding area, that is, flow relatively evenly in the cavity between the second silencing block 1061 and the first silencing block 1062, thereby improving the uniformity of passing through the first silencing block 1062 and improving the silencing effect of the second silencing.

[0049] Please continue to refer to this. Figure 6 and combined Figure 15 understand, Figure 15 for Figure 6 A schematic diagram of the structure of the 1063 intermediate bushing.

[0050] The silencing assembly 106 in this embodiment also includes a bushing 1063. The bushing 1063 has an inner hole 1063a and a fluid hole 10633a. The second silencing block 1061 and the first silencing block 1062 are both located in the inner hole 1063a of the bushing 1063. The second through hole 1061a of the second silencing block 1061 is located on the side of the first through hole 1062a away from the fluid hole 10633a. In this way, the second silencing block 1061, the first silencing block 1062, and the bushing 1063 can be used as a single component, which facilitates integral assembly into the valve device 10 and makes assembly easier. For example... Figure 3In this assembly, the silencing component 106 is located in the first channel portion 10a. The entire silencing component 106 is inserted into the first channel portion 10a, making assembly simple. The cooling medium can flow into the bushing 1063 along the first direction, and after passing through the second silencing block 1061 and the first silencing block 1062, it flows out from the fluid hole 10633a. The second silencing block 1061 and the first silencing block 1062 can be press-fitted into the bushing 1063 for better positioning.

[0051] Additionally, the inner bore 1063a of the bushing 1063 may include a stepped bore, such as... Figure 15 As shown, the inner hole 1063a includes a large hole 1063a1 and a small hole 1063a2, which are distributed along a first direction. The diameter of the large hole 1063a1 is larger than that of the small hole 1063a2. At this time, the second noise-absorbing block 1061 is located in the large hole 1063a1, and the first noise-absorbing block 1062 is located in the small hole 1063a2. Due to the stepped hole arrangement, the inner wall of the bushing 1063 correspondingly has a first stepped surface 10634. After assembly, the second noise-absorbing block 1061 contacts the first stepped surface 10634 on one side along the first direction, and the first noise-absorbing block 1062 has a distance from the first stepped surface 10634 in the first direction, thus maintaining a spaced arrangement with the second noise-absorbing block 1061. Figure 6 From a certain perspective, the second noise-absorbing block 1061 has a first side and a second side distributed along a first direction. The first side of the second noise-absorbing block 1061 is closer to the first noise-absorbing block 1062, so that the first side of the second noise-absorbing block 1061 abuts against the first step surface 10634. In this way, the position of the second noise-absorbing block 1061 in the bushing 1063 along the first direction can be controlled to ensure that the second noise-absorbing block 1061 and the first noise-absorbing block 1062 maintain the required distance H.

[0052] like Figure 15 As shown, bushing 1063 has a first end and a second end distributed along a first direction, and a first stepped surface 10634 faces the first end ( Figure 15At the upper end of the bushing 1063, the bushing 1063 has an inwardly extending limiting flange 10633 at the second end. "Inner" means the direction close to the axis of the inner hole 1063a. The central hole defined by the limiting flange 10633 is the fluid hole 10633a of the bushing 1063. The first noise-absorbing block 1062 contacts the limiting flange 10633 on one side along the first direction. The first noise-absorbing block 1062 has a third side and a fourth side distributed along the first direction. The third side faces the second noise-absorbing block 1061. The third side of the first noise-absorbing block 1062 has a distance H between it and the first step surface 10634, and the fourth side contacts the limiting flange 10633. In this way, the limiting flange 10633 can control the position of the first silencing block 1062 in the bushing 1063 along the first direction. As long as the second silencing block 1061 abuts against the first step surface 10634 and the first silencing block 1062 abuts against the limiting flange 10633, and the thickness of the first silencing block 1062 is less than the extension distance of the side wall of the limiting small hole 1063a2 along the first direction, the distance H between the two can be determined. This also plays a good limiting role for the second silencing block 1061 and the first silencing block 1062, preventing the second silencing block 1061 and the first silencing block 1062 from detaching from the bushing 1063.

[0053] Since the first silencing block 1062 contacts the limiting flange 10633 on one side along the first direction, as Figure 14 and Figure 15 As shown, when projected in the first direction, the portion of the projection of the wall of the first through hole 1062a is located inside the projection of the limiting flange 10633. At this time, the radial extension distance of the limiting flange 10633 is less than the radial extension distance of the first through hole 1062a, preventing the limiting flange 10633 from covering the first through hole 1062a and avoiding foreign matter and impurities flowing out of the first through hole 1062a from clogging the limiting flange 10633. This facilitates the passage of the cold medium and foreign matter and impurities through the silencing component 106.

[0054] In this embodiment, the bushing 1063 can be an integral stepped structure, such as... Figure 15 As shown, bushing 1063 includes a large-diameter sleeve section 10631 and a small-diameter sleeve section 10632. The large-diameter sleeve section 10631 has the aforementioned large hole 1063a1, and the small-diameter sleeve section 10632 has the aforementioned small hole 1063a2. Bushing 1063 is a tubular structure with equal wall thickness. The inner and outer diameters of the large-diameter sleeve section 10631 are relatively large, while the inner and outer diameters of the small-diameter sleeve section 10632 are relatively small. The inner wall of bushing 1063 forms a first stepped surface 10634, and the outer wall forms a second stepped surface 10635. This structure makes bushing 1063 easy to manufacture. At this time, the second noise-absorbing block 1061 is located in the large-diameter sleeve section 10631, and the first noise-absorbing block 1062 is located in the small-diameter sleeve section 10632.

[0055] like Figure 4As shown, the valve body 105 has a stepped wall 1051 on the inner wall corresponding to the first channel portion 10a. When the muffler assembly 106 is installed, the second stepped surface 10635 of the bushing 1063 abuts against the stepped wall 1051, which facilitates the control of the assembly position of the muffler assembly 106.

[0056] in addition, Figure 12 The first through hole 1062a shown in the diagram is specifically a notch provided on the outer periphery of the first muffler block 1062. The notch is easy to process. Moreover, after the first muffler block 1062 is installed into the bushing 1063, the notch and the inner wall of the bushing 1063 cooperate to form an annular closed hole structure, and the cold medium can flow out from the notch.

[0057] Please continue to refer to this. Figure 16 , Figure 16 This is a schematic diagram of the structure of a silencing component 106 provided in the valve device 10 in another embodiment of this application, only showing the position of the first channel portion 10a.

[0058] In this embodiment, the silencing component 106 only includes a bushing 1063 and a first silencing block 1062, and does not include a second silencing block 1061. The structure of the first silencing block 1062 can be understood with reference to the above embodiment, and will not be repeated here. In this case, the bushing 1063 is no longer a stepped structure. The bushing 1063 includes a straight cylindrical wall portion 10636 of equal diameter and a limiting flange 10633 disposed at one end of the straight cylindrical wall portion 10636. Similarly, the first silencing block 1062 can abut against the limiting flange 10633 along a first direction, which is also the axial direction of the bushing 1063. Similar to the above embodiment, the portion of the wall portion of the first through hole 1062a projected in the first direction is located inside the projection of the limiting flange 10633, preventing foreign matter and impurities flowing out of the first through hole 1062a from clogging the limiting flange 10633, and facilitating the passage of the cold medium and foreign matter and impurities through the silencing component 106.

[0059] Furthermore, the valve device 10 in this embodiment may also include a gasket 107, which is disposed between the bushing 1063 and the stepped wall 1051 of the valve device 10 along the axial direction (i.e., the first direction) of the bushing 1063. The gasket 107 can increase the gap between the stepped wall 1051 and the first silencing block 1062, reducing the blockage of foreign matter flowing through the notch. The gasket 107 may be annular, with a limiting flange 10633 having a fluid hole 10633a. The channel of the gasket 107 communicates with the first through hole 1062a through the fluid hole 10633a. The inner diameter of the gasket 107 may be smaller than the inner diameter of the stepped wall 1051 to ensure sufficient clearance. Alternatively, the gasket 107 may also be a plurality of gasket structures arranged along the circumferential direction of the bushing 1063. The gap between the plurality of gasket structures defines a channel communicating with the fluid hole 10633a, which communicates with the channel portion in the valve device 10. It is understood that a gasket 107 can also be provided between the bushing 1063 and the step wall 1051 in the above embodiments, which will not be described in detail here.

[0060] like Figure 3 , Figure 4 as well as Figure 16 As shown, in this embodiment, the silencing component 106 is disposed at the first channel portion 10a. It can be understood that the silencing component 106 can also be disposed at the valve port portion 10c, specifically upstream of the valve port portion 10c, which can improve the noise generated by the rupture of the gaseous refrigerant after throttling. Alternatively, the silencing component 106 can also be disposed at the second channel portion 10b, thus reducing noise at the second channel portion 10b and also helping to reduce the noise generated by the refrigerant entering the downstream equipment. That is, as long as the silencing component 106 is disposed inside the valve device 10, it can play a certain role in silencing; at least one of these three locations is sufficient.

[0061] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A noise reduction component, characterized in that, The device includes a first silencing block (1062) and a bushing (1063). The first silencing block (1062) is positioned within the bushing (1063). The first silencing block (1062) has a first silencing hole (1062b) and a plurality of first through holes (1062a). The first through holes (1062a) penetrate the first silencing block (1062) along a first direction, and at least a portion of the first through holes (1062a) are notches provided on the outer periphery of the first silencing block (1062). The diameter of the first through holes (1062a) is larger than the diameter of the first silencing hole (1062b). The inner wall of the bushing (1063) is in contact with the outer peripheral wall of the first silencing block (1062).

2. The noise reduction assembly according to claim 1, characterized in that, The noise reduction assembly further includes a second noise reduction block (1061), the second noise reduction block (1061) and the first noise reduction block (1062) are distributed along the first direction, and the second noise reduction block (1061) has a second noise reduction hole (1061b). The second silencing block (1061) has a second through hole (1061a), which penetrates the second silencing block (1061) along the first direction. The diameter of the second through hole (1061a) is larger than the diameter of the second silencing hole (1061b). Furthermore, the second silencing block (1061) and the first silencing block (1062) have a distance between them in the first direction.

3. The noise reduction assembly according to claim 2, characterized in that, Projecting along the first direction, the projection of the second via (1061a) and the projection of the first via (1062a) are at least partially offset.

4. The noise reduction assembly according to claim 3, characterized in that, The second muffler block (1061) and the first muffler block (1062) are coaxially arranged, the second through hole (1061a) is located in the middle of the second muffler block (1061), and the first through hole (1062a) is located off-center from the middle of the first muffler block (1062). Multiple first through holes (1062a) are evenly arranged along the circumference of the first noise-absorbing block (1062).

5. The noise reduction assembly according to any one of claims 2-4, characterized in that, The bushing (1063) has an inner hole (1063a) and a fluid hole (10633a). The second silencing block (1061) and the first silencing block (1062) are both located in the inner hole (1063a) of the bushing (1063). The second through hole (1061a) and the first through hole (1062a) are connected to the fluid hole (10633a).

6. The noise reduction assembly according to claim 5, characterized in that, Both the second silencing block (1061) and the first silencing block (1062) include a multi-layered filter structure; The second through hole (1061a) is located on the side of the first through hole (1062a) away from the fluid hole (10633a), and the diameter of the second silencing hole (1061b) of the second silencing block (1061) is greater than or equal to the diameter of the first silencing hole (1062b) of the first silencing block (1062).

7. The noise reduction assembly according to claim 6, characterized in that, The inner hole (1063a) of the bushing (1063) includes a stepped hole, which includes a large hole (1063a1) and a small hole (1063a2). The second noise-absorbing block (1061) is located in the large hole (1063a1), and the first noise-absorbing block (1062) is located in the small hole (1063a2). The inner wall of the bushing (1063) has a first stepped surface (10634), and the second noise-absorbing block (1061) contacts the first stepped surface (10634) on one side along the first direction. The first noise-absorbing block (1062) and the first stepped surface (10634) have a distance in the first direction.

8. The noise reduction assembly according to any one of claims 1 to 7, characterized in that, The bushing (1063) has an inwardly extending limiting flange (10633) at its end, and the first noise-absorbing block (1062) contacts the limiting flange (10633) on one side along the first direction. Projecting along the first direction, a portion of the projection of the wall of the first through hole (1062a) is located inside the projection of the limiting flange (10633).

9. The noise reduction assembly according to any one of claims 1 to 7, characterized in that, The outer wall of the bushing (1063) has a second stepped surface (10635) for abutting against the stepped wall (1051) of the valve device (10); The bushing (1063) includes a small diameter sleeve segment (10632), and the first silencing block (1062) is located in the small diameter sleeve segment (10632). Alternatively, the bushing (1063) includes a large diameter sleeve segment (10631) and a small diameter sleeve segment (10632). The silencing assembly further includes a second silencing block (1061), which is located in the large diameter sleeve segment (10631), and the first silencing block (1062) is located in the small diameter sleeve segment (10632).

10. A valve device, characterized in that, The valve device (10) has a first channel portion (10a), a second channel portion (10b), and a valve port portion (10c), wherein the first channel portion (10a) and the second channel portion (10b) are connected through the valve port portion (10c), and the valve device (10) further includes a silencing component (106) as described in any one of claims 1-9, wherein the silencing component (106) is disposed in at least one of the first channel portion (10a), the second channel portion (10b), and the valve port portion (10c).

11. The valve device according to claim 10, characterized in that, The valve device (10) has a stepped wall (1051), and the bushing (1063) has a second stepped surface (10635), which abuts against the stepped wall (1051) of the valve device (10).

12. The valve device according to claim 10 or 11, characterized in that, The valve device (10) further includes a gasket (107) having a stepped wall (1051) along the axial direction of the bushing (1063), the gasket (107) being located between the bushing (1063) and the stepped wall (1051), and the channel defined by the gasket (107) communicating with the first through hole (1062a).

Images