Expansion valve and air conditioning system

Abstract

The utility model discloses an expansion valve and an air conditioning system. The expansion valve comprises a mounting base, a silencing assembly and a valve assembly. The mounting base is provided with a silencing channel and a mounting cavity which communicate with each other. And at least part of the silencing assembly is limited in the silencing channel. The valve assembly is connected with the mounting base, and at least part of the valve assembly is arranged in the mounting cavity and abuts against the silencing assembly.

Description

Technical Field

[0001] The present application relates to the technical field of expansion valves, and in particular to an expansion valve and an air-conditioning system. Background Art

[0002] An expansion valve is a valve used to regulate the flow of a fluid. In the related art, a muffler component is usually set in the expansion valve to improve the problem of abnormal noise caused by vortex. However, the muffler component in the related art is set in the expansion valve, which has the problem of complex installation process and high cost. Utility Model Content

[0003] The embodiments of the present application provide an expansion valve and an air conditioning system to improve the problems of complex installation process and high cost of silencer components in the related art.

[0004] The expansion valve of the embodiment of the present application includes:

[0005] A mounting seat having a silencer channel and a mounting cavity that are interconnected;

[0006] a muffler assembly, at least a portion of which is confined within the muffler passage; and

[0007] The valve assembly is connected to the mounting seat, and at least a portion of the valve assembly is disposed in the mounting cavity and presses against the muffler assembly.

[0008] According to some embodiments of the present application, a first limiting structure is provided on the inner wall surface of the silencer channel, and the silencer assembly abuts against the first limiting structure.

[0009] According to some embodiments of the present application, the first limiting structure is protruded from the inner wall surface of the silencing channel.

[0010] According to some embodiments of the present application, the first limiting structure is a ring structure.

[0011] According to some embodiments of the present application, a second limiting structure is provided in the installation cavity, and the bottom of the valve assembly is abutted against the top of the silencer assembly and the second limiting structure at the same time.

[0012] According to some embodiments of the present application, the bottom surface of the valve assembly, the step surface of the second limiting structure, and the top surface of the silencer assembly are located in the same plane.

[0013] According to some embodiments of the present application, the muffler assembly includes:

[0014] a first muffler, wherein at least a portion of the first muffler is confined within the muffler channel, and a gap is provided between an outer peripheral surface of the first muffler and an inner wall surface of the muffler channel;

[0015] The valve assembly presses against the first silencer.

[0016] According to some embodiments of the present application, the first silencer is in contact with the first limiting structure, and the valve assembly presses against a surface of the first silencer facing away from the first limiting structure;

[0017] A mounting groove is provided on a surface of one side of the valve assembly facing the muffler channel, and part of the first muffler is located in the mounting groove.

[0018] According to some embodiments of the present application, the valve assembly includes a valve core having a valve port, and the mounting groove is connected to the valve port.

[0019] According to some embodiments of the present application, the muffler assembly further includes:

[0020] The silencer frame is located in the silencer channel and abuts against the first limiting structure; the first silencer member abuts against the silencer frame, and the valve assembly presses against a side surface of the first silencer member facing away from the silencer frame.

[0021] According to some embodiments of the present application, the first silencer and the silencer frame are both provided with impurity channels, and the impurity channel of the first silencer is in communication with the impurity channel of the silencer frame.

[0022] According to some embodiments of the present application, the muffler assembly further includes:

[0023] The second silencer is connected to the silencer frame and is arranged opposite to the first silencer in the axial direction of the silencer channel.

[0024] According to some embodiments of the present application, both the first silencer and the second silencer are provided with an impurity channel, and the impurity channel of the first silencer is connected to the impurity channel of the second silencer.

[0025] According to some embodiments of the present application, a chamfer is provided at a connection between an inner wall surface of the silencing channel and an inner wall surface of the mounting cavity.

[0026] According to some embodiments of the present application, the chamfer has a curved surface.

[0027] The air conditioning system of the embodiment of the present application includes the expansion valve described in any one of the above items.

[0028] One embodiment of the above application has at least the following advantages or beneficial effects:

[0029] The expansion valve of the embodiment of the present application, on the one hand, has a simple installation process for the silencer assembly and is easy to operate, thus having a low cost; on the other hand, the silencer assembly is pressed by the valve assembly, so that the silencer assembly can be firmly located in the silencer channel, thereby preventing the silencer assembly from being displaced in the silencer channel and affecting the silencer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 What is shown is a three-dimensional schematic diagram of the expansion valve of the first embodiment of the present application at a viewing angle.

[0031] Figure 2 Shown is a three-dimensional schematic diagram of the expansion valve of the first embodiment of the present application from another viewing angle.

[0032] Figure 3 Shown is a schematic top view of the expansion valve of the first embodiment of the present application.

[0033] Figure 4 It is shown that Figure 3 Sectional view along line AA.

[0034] Figure 5 It is shown that Figure 4 A local enlarged view of point X1 in the middle.

[0035] Figure 6 Shown is an exploded schematic view of the sound attenuation assembly.

[0036] Figure 7 Shown is a cross-sectional view of an expansion valve according to a second embodiment of the present application.

[0037] Figure 8 It is shown that Figure 7 A local enlarged view of the X2 point in the middle.

[0038] Fig. 9 Shown is a cross-sectional view of an expansion valve according to a third embodiment of the present application.

[0039] Fig.10 It is shown that Fig. 9 A partial enlarged view of the X3 point in the middle.

[0040] The reference numerals are described as follows:

[0041] 100. Mounting seat

[0042] 101. Top

[0043] 102. Bottom surface

[0044] 103. First side

[0045] 104. Second side

[0046] 105. Import

[0047] 106. Export

[0048] 110. Installation cavity

[0049] 111. Second limit structure

[0050] 120. Silencer Channel

[0051] 121. The first limiting structure

[0052] 130. Chamfer

[0053] 131. Curved Surface

[0054] 140. Sink

[0055] 200. Silencer components

[0056] 210. Silencer

[0057] 220. First silencer

[0058] 230. Second silencer

[0059] 300. Valve assembly

[0060] 310, valve core

[0061] 311, valve port

[0062] 312. Installation slot

[0063] 320, valve needle parts

[0064] 330, Blocking Department

[0065] D1, first direction

[0066] D2, Second Direction

[0067] D3. Third direction

[0068] G. Clearance DETAILED DESCRIPTION

[0069] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0070] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0071] like Figure 1 and Figure 2 As shown, the expansion valve of the embodiment of the present application may be an electronic expansion valve, and includes a mounting seat 100 and a valve assembly 300 , wherein the valve assembly 300 is mounted on the mounting seat 100 .

[0072] The present application does not specifically limit the shape of the mounting seat 100 , for example, the mounting seat 100 may be in the shape of a cube, a cylinder, etc. Next, the mounting seat 100 is described by taking the shape of a cube as an example.

[0073] The mounting base 100 has a length direction, a width direction and a height direction. For the convenience of description, the length direction of the mounting base 100 is defined as a first direction D1, the width direction of the mounting base 100 is defined as a second direction D2, and the height direction of the mounting base 100 is defined as a third direction D3, wherein the first direction D1, the second direction D2 and the third direction D3 are perpendicular to each other.

[0074] The mounting base 100 has a top surface 101, a bottom surface 102, two first side surfaces 103 and two second side surfaces 104. The top surface 101 and the bottom surface 102 are arranged opposite to each other along the third direction D3, the two first side surfaces 103 are arranged opposite to each other along the first direction D1, and the two second side surfaces 104 are arranged opposite to each other along the second direction D2. The area of ​​the second side surface 104 may be greater than the area of ​​the first side surface 103, but is not limited thereto.

[0075] like Figure 3 and Figure 4 As shown, the mounting seat 100 has a silencing passage 120 and a mounting cavity 110 that are interconnected, and at least a portion of the valve assembly 300 is disposed in the mounting cavity 110. The mounting cavity 110 may be recessed from the top surface 101 along the third direction D3 toward the bottom surface 102, and the silencing passage 120 may be recessed from the cavity bottom of the mounting cavity 110 along the third direction D3 toward the bottom surface 102. In other words, the mounting cavity 110 and the silencing passage 120 are arranged in the third direction D3, and the silencing passage 120 is closer to the bottom surface 102.

[0076] Return to Reference Figure 1 and Figure 2In one embodiment, the mounting base 100 further has an inlet 105 and an outlet 106 , which are respectively arranged on two second side surfaces 104 of the mounting base 100 , and the inlet 105 is connected to the mounting cavity 110 , and the outlet 106 is connected to the muffler channel 120 .

[0077] Of course, in another embodiment, the inlet 105 and the outlet 106 may be respectively disposed on the two first side surfaces 103 of the mounting base 100 ; in yet another embodiment, the inlet 105 and the outlet 106 are respectively disposed on the first side surface 103 and the second side surface 104 of the mounting base 100 .

[0078] like Figure 4 As shown, the expansion valve of the embodiment of the present application further includes a silencer assembly 200 , at least a portion of the silencer assembly 200 is confined within the silencer channel 120 , and the valve assembly 300 presses against the silencer assembly 200 .

[0079] It can be understood that when assembling the expansion valve of the embodiment of the present application, the silencer assembly 200 can be first passed through the installation cavity 110 and installed in the silencer channel 120, and then the valve assembly 300 is connected to the mounting seat 100, and at least a portion of the valve assembly 300 is extended into the installation cavity 110 and pressed against the silencer assembly 200.

[0080] It can be seen that in the expansion valve of the embodiment of the present application, on the one hand, the installation process of the silencer assembly 200 is relatively simple and easy to operate, and thus the cost is relatively low; on the other hand, the silencer assembly 200 is pressed by the valve assembly 300, so that the silencer assembly 200 can be firmly set in the silencer channel 120, avoiding the silencer assembly 200 from being displaced in the silencer channel 120 and affecting the silencer effect.

[0081] like Figure 4 As shown, the mounting seat 100 further has a recessed groove 140, which is recessed from the top surface 101 of the mounting seat 100 along the third direction D3 to the bottom surface 102. A gap G is provided between the valve assembly 300 and the bottom surface of the recessed groove 140, and the gap G can be used as a reserved space when the valve assembly 300 is installed in the mounting cavity 110, so that the valve assembly 300 can press against the muffler assembly 200.

[0082] like Figure 4 As shown, the valve assembly 300 includes a valve core 310, a valve needle component 320 and a blocking portion 330. The valve core 310 is arranged in the installation cavity 110 and has a valve port 311. The inlet 105 and the outlet 106 are connected through the valve port 311. The blocking portion 330 is connected to the mounting seat 100 to block the opening of the installation cavity 110. As an example, the blocking portion 330 and the mounting seat 100 can be screwed, but not limited to this. The valve needle component 320 is movably inserted into the blocking portion 330 to open or close the valve port 311.

[0083] like Figure 5 As shown, the inner wall surface of the silencer channel 120 is provided with a first limiting structure 121 , and the silencer assembly 200 abuts against the first limiting structure 121 .

[0084] In the embodiment of the present application, the silencer assembly 200 is in contact with the first limiting structure 121 and is pressed by the valve assembly 300 , which further improves the firmness of the silencer assembly 200 in the silencer channel 120 .

[0085] In one embodiment, the first limiting structure 121 is convexly disposed on the inner wall surface of the muffler channel 120. In other words, the inner wall surface of the muffler channel 120 forms a step structure. When the muffler channel 120 is installed into the muffler channel 120 from the installation cavity 110, the step structure can abut against the muffler assembly 200, thereby playing a limiting role.

[0086] Of course, in other embodiments, the first limiting structure 121 may also be a groove, and the groove is provided on the inner wall surface of the muffler channel 120 .

[0087] In one embodiment, the first limiting structure 121 is an annular structure. By designing the first limiting structure 121 as an annular structure, the abutment force applied by the first limiting structure 121 to the muffler assembly 200 is distributed more evenly.

[0088] Of course, in other embodiments, the first limiting structure 121 may also include a plurality of protrusions, and the plurality of protrusions are arranged along the circumference of the silencer channel 120 , and each protrusion abuts against the silencer assembly 200 .

[0089] Please continue reading Figure 5 A chamfer 130 is provided at the connection between the inner wall surface of the muffler channel 120 and the inner wall surface of the mounting cavity 110 .

[0090] In the embodiment of the present application, a chamfer 130 is provided at the connection between the inner wall surface of the silencer channel 120 and the inner wall surface of the installation cavity 110, that is, the silencer channel 120 opens at one end toward the installation cavity 110 to form an outward expansion structure, so that the process of installing the silencer assembly 200 from the installation cavity 110 into the silencer channel 120 is smoother, and the sharp angle formed at the connection between the inner wall surface of the silencer channel 120 and the inner wall surface of the installation cavity 110 is avoided to affect the installation of the silencer assembly 200.

[0091] In one embodiment, the chamfer 130 has an arc surface 131. The arc surface 131 is smoother, which further reduces the difficulty of aligning the muffler assembly 200 with the muffler channel 120, and helps to improve assembly efficiency.

[0092] Of course, in other embodiments, the arc surface 131 of the chamfer 130 may also be replaced by a slope.

[0093] It is understandable that the present application does not specifically limit the structure of the silencer assembly 200. For example, the silencer assembly 200 may include only one component that can achieve a silencer effect, or may include multiple components. Next, the silencer assembly 200 is described by taking the silencer assembly 200 including multiple components as an example.

[0094] like Figure 6 As shown, the silencer assembly 200 includes a silencer frame 210, a first silencer 220 and a second silencer 230. The silencer frame 210 is in contact with the first limiting structure 121. The first silencer 220 is located in the silencer channel 120, and there is a gap between the outer peripheral surface of the first silencer 220 and the inner wall surface of the silencer channel 120. The valve assembly 300 presses against the side surface of the first silencer 220 facing away from the silencer frame 210. The second silencer 230 is connected to the silencer frame 210, and in the axial direction (third direction D3) of the silencer channel 120, the second silencer 230 is arranged opposite to the first silencer 220.

[0095] Next, the installation process of the expansion valve is described by taking the silencer assembly 200 including the silencer frame 210, the first silencer member 220 and the second silencer member 230 as an example.

[0096] First, the silencer frame 210 and the second silencer member 230 are connected, for example, by riveting; then, the assembled silencer frame 210 and the second silencer member 230 are installed into the silencer channel 120 from the installation cavity 110 until the silencer frame 210 abuts against the first limiting structure 121; thereafter, the first silencer member 220 is installed, and the first silencer member 220 is aligned with the silencer channel 120 to install the first silencer member 220 into the silencer channel 120; finally, the valve assembly 300 and the mounting seat 100 are connected, and at least a portion of the valve assembly 300 is extended into the installation cavity 110 and presses against the first silencer member 220.

[0097] It is worth mentioning that since a chamfer 130 is provided at the connection between the inner wall surface of the silencer channel 120 and the inner wall surface of the installation cavity 110 , when the first silencer 220 is installed, the setting of the chamfer 130 is more conducive to aligning the first silencer 220 with the silencer channel 120 .

[0098] Please return to Figure 5, the silencer frame 210 abuts against the first silencer component 220. In the embodiment of the present application, the silencer frame 210 abuts against the first limiting structure 121, the valve assembly 300 presses against the first silencer component 220, and the first silencer component 220 abuts against the silencer frame 210, which further improves the firmness of the silencer frame 210, the first silencer component 220 and the second silencer component 230 in the silencer channel 120. A second limiting structure 111 is provided in the installation cavity 110, and the bottom of the valve assembly 300 abuts against the second limiting structure 111 and the top of the silencer component 200 at the same time. When the valve assembly 300 is installed in place, it abuts against the second limiting structure 111. At this time, the valve assembly 300 can press the silencer component 200 to ensure that the installation and fixation of the silencer component 200 are completed. Specifically, the second limiting structure 111 is a limiting step, and the bottom surface of the valve assembly 300, the step surface of the second limiting structure 111, and the top surface of the muffler assembly 200 are located in the same plane.

[0099] It is understandable that the first silencer 220 and the second silencer 230 are silencer filters, and are sintered with 75-mesh multi-layer stainless steel mesh, and the wire diameter of the stainless steel mesh can be between 0.1 mm and 0.15 mm, such as 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, and 0.15 mm. The silencer filter of the first silencer 220 and the silencer filter of the second silencer 230 are both formed with small-caliber silencer holes, which evenly refine the bubbles in the medium to achieve a silencer effect.

[0100] As an example, Figure 6 As shown, the first muffler 220 and the muffler frame 210 are both provided with impurity channels. The impurity channel of the first muffler 220 is defined as the first impurity channel 221, and the impurity channel of the muffler frame 210 is defined as the second impurity channel 211. The first impurity channel 221 is connected to the second impurity channel 211. The first impurity channel 221 is provided in the middle of the first muffler 220, and penetrates the first muffler 220 along the third direction D3. The flow cross-sectional area of ​​the first impurity channel 221 is greater than the minimum flow cross-sectional area of ​​the muffler hole of the first muffler 220. The number of the second impurity channels 211 on the muffler frame 210 can be multiple, and the multiple second impurity channels 211 are arranged at intervals along the circumference of the muffler frame 210. Each second impurity channel 211 penetrates the muffler frame 210 along the third direction D3. The flow cross-sectional area of ​​each second impurity channel 211 is greater than the minimum flow cross-sectional area of ​​the muffler hole of the second muffler 230. Impurities in the fluid can pass through the impurity channel to prevent the impurities in the fluid from being blocked in the silencer hole and affecting the silencer effect. The impurity channel is combined with the silencer hole to achieve the silencer effect and prevent the silencer hole from being blocked by impurities.

[0101] Of course, in another embodiment, both the first muffler 220 and the second muffler 230 are provided with impurity channels, and the impurity channels of the first muffler 220 and the impurity channels of the second muffler 230 are connected. The flow cross-sectional area of ​​the impurity channel of the first muffler 220 is greater than the minimum flow cross-sectional area of ​​the muffler hole of the first muffler 220. The flow cross-sectional area of ​​the impurity channel of the second muffler 230 is greater than the minimum flow cross-sectional area of ​​the muffler hole of the second muffler 230. Impurities in the fluid can pass through the impurity channel to avoid impurities in the fluid from being blocked in the muffler channel and affecting the muffler effect. The impurity channel is combined with the muffler hole to achieve the muffler effect and avoid the muffler channel being blocked by impurities.

[0102] In another embodiment, the first muffler 220, the second muffler 230 and the muffler frame 210 may all be provided with impurity channels. The impurity channels of the first muffler 220, the second muffler 230 and the muffler frame 210 are connected.

[0103] like Figure 7 and Figure 8 As shown, the similarities between the expansion valve of the second embodiment of the present application and the expansion valve of the first embodiment are not repeated here, and the difference lies in that:

[0104] The valve core 310 has a mounting groove 312 on one side of the surface facing the muffler channel 120, and a portion of the first muffler 220 is located in the mounting groove 312. The bottom of the mounting groove 312 is farther away from the valve port 311 than the second limiting structure.

[0105] In the embodiment of the present application, by setting a mounting groove 312 on the valve core 310 and partially locating the first silencer 220 in the mounting groove 312, the thickness of the first silencer 220 can be increased without increasing the size of the expansion valve along the third direction D3, thereby improving the silencer effect.

[0106] like Fig. 9 and Fig.10 As shown, the similarities between the expansion valve of the third embodiment of the present application and the expansion valve of the second embodiment are not repeated here, and the difference lies in that:

[0107] The silencer assembly 200 only includes a first silencer 220 , which abuts against the first limiting structure 121 , and the valve core 310 of the valve assembly 300 presses against a side surface of the first silencer 220 facing away from the first limiting structure 121 .

[0108] The present application also provides an air conditioning system, including the expansion valve of any of the above embodiments. Since the expansion valve of any of the above embodiments is included, the air conditioning system of the present application embodiment has all the advantages and beneficial effects of any of the above embodiments, which will not be described in detail here.

[0109] In summary, the expansion valve and air conditioning system of the embodiment of the present application have at least the following advantages and beneficial effects:

[0110] The expansion valve of the embodiment of the present application, on the one hand, the installation process of the silencer assembly 200 is relatively simple and easy to operate, and thus the cost is relatively low; on the other hand, the silencer assembly 200 is pressed by the valve assembly 300, so that the silencer assembly 200 can be firmly set in the silencer channel 120, avoiding the silencer assembly 200 from being displaced in the silencer channel 120 and affecting the silencer effect.

[0111] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0112] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0113] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0114] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. An expansion valve, characterized in that: include: A mounting seat having a silencer channel and a mounting cavity that are interconnected; a muffler assembly, at least a portion of which is confined within the muffler passage; as well as The valve assembly is connected to the mounting seat, and at least a portion of the valve assembly is disposed in the mounting cavity and presses against the muffler assembly.

2. The expansion valve according to claim 1, characterized in that: The inner wall surface of the silencer channel is provided with a first limiting structure, and the silencer assembly abuts against the first limiting structure.

3. The expansion valve according to claim 2, characterized in that: The first limiting structure is protruding from the inner wall surface of the muffler channel.

4. The expansion valve according to claim 2, characterized in that: The first limiting structure is a ring structure.

5. The expansion valve according to claim 1, characterized in that: A second limiting structure is provided in the installation cavity, and the bottom of the valve assembly abuts against the top of the muffler assembly and the second limiting structure at the same time.

6. The expansion valve according to claim 5, characterized in that: The bottom surface of the valve assembly, the step surface of the second limiting structure, and the top surface of the silencer assembly are located in the same plane.

7. The expansion valve according to claim 2, characterized in that: The muffler assembly comprises: a first muffler, wherein at least a portion of the first muffler is confined within the muffler channel, and a gap is provided between an outer peripheral surface of the first muffler and an inner wall surface of the muffler channel; The valve assembly presses against the first silencer.

8. The expansion valve according to claim 7, characterized in that The first silencer is in contact with the first limiting structure, and the valve assembly presses against a surface of the first silencer facing away from the first limiting structure; A mounting groove is provided on a surface of one side of the valve assembly facing the muffler channel, and part of the first muffler is located in the mounting groove.

9. The expansion valve according to claim 8, characterized in that The valve assembly comprises a valve core having a valve port, and the mounting groove is communicated with the valve port.

10. The expansion valve according to claim 7, characterized in that The muffler assembly also includes: The silencer frame is located in the silencer channel and abuts against the first limiting structure; the first silencer member abuts against the silencer frame, and the valve assembly presses against a side surface of the first silencer member facing away from the silencer frame.

11. The expansion valve according to claim 10, characterized in that The first silencer and the silencer frame are both provided with impurity channels, and the impurity channel of the first silencer is communicated with the impurity channel of the silencer frame.

12. The expansion valve according to claim 10, characterized in that The muffler assembly also includes: The second silencer is connected to the silencer frame and is arranged opposite to the first silencer in the axial direction of the silencer channel.

13. The expansion valve according to claim 12, characterized in that The first silencer and the second silencer are both provided with impurity channels, and the impurity channel of the first silencer is communicated with the impurity channel of the second silencer.

14. The expansion valve according to claim 1, characterized in that A chamfer is provided at a connection between the inner wall surface of the silencing channel and the inner wall surface of the mounting cavity.

15. The expansion valve according to claim 14, characterized in that The chamfer has an arc-shaped surface.

16. An air conditioning system, characterized in that: Comprising the expansion valve according to any one of claims 1 to 15.

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