Expansion valve and air conditioning system

Abstract

Disclosed are an expansion valve and an air conditioning system. The expansion valve comprises a mounting base (100), a silencing assembly (200), and a valve assembly (300). The mounting base is provided with a silencing channel (120) and a mounting cavity (110)which are in communication with one another. At least part of the silencing assembly is limited in the silencing channel. The valve assembly is connected to the mounting base. At least part of the valve assembly is arranged in the mounting cavity and abuts against the silencing assembly.

Description

Expansion valve and air conditioning system

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] The present disclosure claims priority to the Chinese patent application No. 202420726451.2, filed on April 9, 2024, entitled “Expansion valve and air conditioning system”, the entire contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present disclosure relates generally to the technical field of expansion valve, and in particular, to an expansion valve and an air conditioning system. BACKGROUND

[0004] An expansion valve is a valve used to regulate fluid flow. In the related art, a sound attenuation assembly is usually arranged in the expansion valve to improve the problem of abnormal noise caused by vortex. However, the arrangement of the sound attenuation assembly in the expansion valve in the related art has the problems of complex installation process and high cost.

[0005] SUMMARY

[0006] 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 the sound attenuation assembly in the related art.

[0007] The expansion valve of the embodiments of the present application comprises:

[0008] a mounting seat having a sound attenuation channel and a mounting cavity in communication with each other;

[0009] a sound attenuation assembly, at least part of the sound attenuation assembly being limited in the sound attenuation channel; and

[0010] a valve assembly connected with the mounting seat, at least part of the valve assembly being arranged in the mounting cavity and pressing against the sound attenuation assembly.

[0011] According to some embodiments of the present application, an inner wall surface of the sound attenuation channel is provided with a first limiting structure, and the sound attenuation assembly abuts against the first limiting structure.

[0012] According to some embodiments of the present application, the first limiting structure is protruded on the inner wall surface of the sound attenuation channel.

[0013] According to some embodiments of the present application, the first limiting structure is an annular structure.

[0014] According to some embodiments of the present application, a second limiting structure is arranged in the mounting cavity, and the bottom of the valve assembly abuts against the top of the sound attenuation assembly and the second limiting structure at the same time.

[0015] According to some embodiments of the present application, the second limiting structure is a limiting step, and the bottom surface of the valve assembly, the step surface of the second limiting structure, and the top surface of the sound-damping assembly are located in the same plane.

[0016] According to some embodiments of the present application, the sound-damping assembly comprises:

[0017] The first sound-damping member is at least partially limited in the sound-damping channel, and a gap is formed between the outer circumferential surface of the first sound-damping member and the inner wall surface of the sound-damping channel.

[0018] The valve assembly presses against the first sound-damping member.

[0019] According to some embodiments of the present application, the first sound-damping member abuts against the first limiting structure, and the valve assembly presses against the side surface of the first sound-damping member which is away from the first limiting structure.

[0020] The side surface of the valve assembly which faces the sound-damping channel is provided with a mounting groove, and part of the first sound-damping member is located in the mounting groove.

[0021] According to some embodiments of the present application, the valve assembly comprises a valve core, and the valve core is provided with a valve port, and the mounting groove is in communication with the valve port.

[0022] According to some embodiments of the present application, the sound-damping assembly further comprises:

[0023] A sound-damping frame is located in the sound-damping channel and abuts against the first limiting structure, the first sound-damping member abuts against the sound-damping frame, and the valve assembly presses against the side surface of the first sound-damping member which is away from the sound-damping frame.

[0024] According to some embodiments of the present application, the first sound-damping member and the sound-damping frame are both provided with impurity channels, and the impurity channel of the first sound-damping member is in communication with the impurity channel of the sound-damping frame.

[0025] According to some embodiments of the present application, the sound-damping assembly further comprises:

[0026] A second sound-damping member is connected to the sound-damping frame, and the second sound-damping member is arranged opposite to the first sound-damping member in the axial direction of the sound-damping channel.

[0027] According to some embodiments of the present application, the first sound-damping member and the second sound-damping member are both provided with impurity channels, and the impurity channel of the first sound-damping member is in communication with the impurity channel of the second sound-damping member.

[0028] According to some embodiments of the present application, a chamfer is arranged at the connection between the inner wall surface of the sound-damping channel and the inner wall surface of the mounting cavity.

[0029] According to some embodiments of the present application, the chamfer has an arc surface.

[0030] According to some embodiments of the present application, the sound-damping assembly comprises two porous members arranged along the axial direction of the sound-damping channel, and each of the porous members is provided with an impurity channel, and the projection of the impurity channel of one of the porous members does not coincide with the projection of the impurity channel of the other porous member in a projection plane perpendicular to the axial direction of the sound-damping channel.

[0031] According to some embodiments of the present application, the cross-sectional area of the impurity channel is half of the cross-sectional area of the valve port of the expansion valve, the axial distance between the uppermost porous member and the valve port of the expansion valve is greater than or equal to 0.3 mm, and the cross-sectional area of the impurity channel of the lowermost porous member is greater than the cross-sectional area of the valve port of the expansion valve.

[0032] According to some embodiments of the present application, the impurity channel of the uppermost porous member is provided in the porous member, and the lowermost porous member is uniformly provided with two or more than two grooves distributed along the circumference of the lowermost porous member, and the grooves form the impurity channel.

[0033] According to some embodiments of the present application, the porous member is a sintered wire mesh filter structure, and the mesh number is 50-90, and the layer number is 3-8.

[0034] According to some embodiments of the present application, a partition is arranged between the two porous members, and a cavity is formed between the partition and the two porous members, and the length of the cavity in the axial direction of the sound-damping channel is L1, and 0.6 mm≤L1≤5 mm.

[0035] According to some embodiments of the present application, the sound-damping assembly further comprises a sleeve, and the porous members are arranged in the sleeve, and the sleeve wall is provided with an opening so as to form a gap between at least one porous member and the cavity wall of the valve cavity.

[0036] The air conditioning system of the embodiment of the present application comprises the expansion valve of any one of the above.

[0037] The embodiment of the above application has at least the following advantages or beneficial effects:

[0038] The expansion valve of the embodiment of the present application has the following advantages: on the one hand, the mounting process of the sound-damping assembly is relatively simple and easy to operate, and the cost is relatively low; on the other hand, the sound-damping assembly is pressed by the valve assembly, so that the sound-damping assembly can be firmly arranged in the sound-damping channel, and displacement of the sound-damping assembly in the sound-damping channel is avoided to affect the sound-damping effect. BRIEF DESCRIPTION OF DRAWINGS

[0039] FIG. 1 shows a perspective view of the expansion valve of the first embodiment of the present application from one viewing angle.

[0040] Fig. 2 shows a perspective view of the expansion valve of the first embodiment of the present application from another perspective.

[0041] Fig. 3 shows a top view of the expansion valve of the first embodiment of the present application.

[0042] Fig. 4 shows a sectional view along line A-A in Fig. 3.

[0043] Fig. 5 shows an enlarged view of X1 in Fig. 4.

[0044] Fig. 6 shows an exploded view of the sound-damping assembly.

[0045] Fig. 7 shows a sectional view of the expansion valve of the second embodiment of the present application.

[0046] Fig. 8 shows an enlarged view of X2 in Fig. 7.

[0047] Fig. 9 shows a sectional view of the expansion valve of the third embodiment of the present application.

[0048] Fig. 10 shows an enlarged view of X3 in Fig. 9.

[0049] Wherein, the reference signs are explained as follows: 100, mounting seat 101, top surface 102, bottom surface 103, first side surface 104, second side surface 105, inlet 106, outlet 110, mounting cavity 111, second limiting structure 120, sound-damping channel 121, first limiting structure 130, chamfer 131, arc surface 140, sink 200, sound-damping assembly 210, sound-damping frame 220, first sound-damping piece 230, second sound-damping piece 300, valve assembly 310, valve core 311, valve port 312, mounting groove 320, valve needle component 330, blocking part D1, first direction D2, second direction D3, third direction G, gap. DETAILED DESCRIPTION

[0050] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided as non-limiting examples so that this disclosure will fully convey the scope thereof to those skilled in the art. Like reference numerals refer to like elements throughout the figures and description, which makes clear the disclosure without further elaboration.

[0051] It is to be understood that the terms "including", "containing", "having" and variations thereof herein are intended to be open-ended terms that specifically mean "comprising". For example, any process, method, system, product, or apparatus that includes a list of steps or elements is not necessarily limited to those steps or elements but can include other steps or elements not expressly listed or inherent to such process, method, system, product, or apparatus.

[0052] As shown in FIG. 1 and FIG. 2, the expansion valve according to the embodiments of the present application can 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.

[0053] The shape of the mounting seat 100 is not particularly limited in the present application, for example, the mounting seat 100 can be a cube, a cylinder, etc. Next, the shape of the mounting seat 100 is taken as a cube as an example for description.

[0054] The mounting seat 100 has a length direction, a width direction and a height direction. For the convenience of description, the length direction of the mounting seat 100 is defined as a first direction D1, the width direction of the mounting seat 100 is defined as a second direction D2, and the height direction of the mounting seat 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.

[0055] The mounting seat 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 oppositely arranged along the third direction D3, the two first side surfaces 103 are oppositely arranged along the first direction D1, and the two second side surfaces 104 are oppositely arranged along the second direction D2. The area of the second side surface 104 can be greater than the area of the first side surface 103, but it is not limited thereto.

[0056] As shown in FIG. 3 and FIG. 4, the mounting seat 100 has a sound attenuation channel 120 and a mounting cavity 110 which are in communication with each other, and at least part of the valve assembly 300 is arranged in the mounting cavity 110. The mounting cavity 110 can be recessed from the top surface 101 to the bottom surface 102 along the third direction D3, and the sound attenuation channel 120 can be recessed from the cavity bottom of the mounting cavity 110 to the bottom surface 102 along the third direction D3. In other words, the mounting cavity 110 and the sound attenuation channel 120 are arranged along the third direction D3, and the sound attenuation channel 120 is closer to the bottom surface 102.

[0057] Referring back to FIG. 1 and FIG. 2, in an embodiment, the mounting seat 100 further has an inlet 105 and an outlet 106, wherein the inlet 105 and the outlet 106 are arranged on the two second side surfaces 104 of the mounting seat 100 respectively, and the inlet 105 is in communication with the mounting cavity 110, and the outlet 106 is in communication with the sound attenuation channel 120.

[0058] Of course, in another embodiment, the inlet 105 and the outlet 106 can be arranged on the two first sides 103 of the mounting base 100 respectively; in yet another embodiment, the inlet 105 and the outlet 106 are arranged on the first side 103 and the second side 104 of the mounting base 100 respectively.

[0059] As shown in FIG. 4, the expansion valve according to the embodiment of the present application further comprises a sound-damping assembly 200, at least a part of the sound-damping assembly 200 is limited in the sound-damping channel 120, and the valve assembly 300 abuts against the sound-damping assembly 200.

[0060] It can be understood that, when the expansion valve according to the embodiment of the present application is assembled, the sound-damping assembly 200 can be first arranged in the sound-damping channel 120 by passing through the mounting cavity 110, and then the valve assembly 300 is connected with the mounting base 100, and at least a part of the valve assembly 300 extends into the mounting cavity 110 and abuts against the sound-damping assembly 200.

[0061] Therefore, the expansion valve according to the embodiment of the present application has the following advantages: on the one hand, the mounting process of the sound-damping assembly 200 is relatively simple and convenient to operate, and thus the cost is relatively low; on the other hand, the sound-damping assembly 200 is abutted by the valve assembly 300, so that the sound-damping assembly 200 can be firmly arranged in the sound-damping channel 120, and displacement of the sound-damping assembly 200 in the sound-damping channel 120 is avoided to affect the sound-damping effect.

[0062] As shown in FIG. 4, the mounting base 100 further has a sink groove 140, the sink groove 140 is recessed from the top surface 101 of the mounting base 100 to the bottom surface 102 along the third direction D3. The valve assembly 300 has a gap G with the groove bottom surface of the sink groove 140, the gap G can reserve space for the valve assembly 300 to be arranged in the mounting cavity 110, so that the valve assembly 300 abuts against the sound-damping assembly 200.

[0063] As shown in FIG. 4, the valve assembly 300 comprises a valve core 310, a valve needle component 320 and a plugging part 330, the valve core 310 is arranged in the mounting cavity 110 and has a valve port 311. The inlet 105 and the outlet 106 are communicated through the valve port 311. The plugging part 330 is connected with the mounting base 100 and is used for plugging the opening of the mounting cavity 110. As an example, the plugging part 330 can be screwed with the mounting base 100, but is not limited thereto. The valve needle component 320 is movably arranged in the plugging part 330 and is used for opening or closing the valve port 311.

[0064] As shown in FIG. 5, the inner wall surface of the sound-damping channel 120 is provided with a first limiting structure 121, and the sound-damping assembly 200 abuts against the first limiting structure 121.

[0065] In the embodiment of the present application, the sound-damping assembly 200 abuts against the first limiting structure 121 and is abutted by the valve assembly 300, which further improves the firmness of the sound-damping assembly 200 arranged in the sound-damping channel 120.

[0066] In an embodiment, the first limiting structure 121 is protruded on the inner wall of the sound damping channel 120. In other words, the inner wall of the sound damping channel 120 forms a stepped structure. When the sound damping channel 120 is loaded into the sound damping assembly 200 by the mounting cavity 110, the stepped structure can abut against the sound damping assembly 200, thereby playing a limiting role.

[0067] Of course, in other embodiments, the first limiting structure 121 can also be a groove provided on the inner wall of the sound damping channel 120.

[0068] In an embodiment, the first limiting structure 121 is a ring-shaped structure. By designing the first limiting structure 121 as a ring-shaped structure, the abutting force applied by the first limiting structure 121 to the sound damping assembly 200 is more evenly distributed.

[0069] Of course, in other embodiments, the first limiting structure 121 can also include a plurality of protrusions arranged along the circumference of the sound damping channel 120, each protrusion abutting against the sound damping assembly 200.

[0070] Please continue to refer to FIG. 5. The connection between the inner wall of the sound damping channel 120 and the inner wall of the mounting cavity 110 is provided with a chamfer 130.

[0071] In the embodiments of the present application, the connection between the inner wall of the sound damping channel 120 and the inner wall of the mounting cavity 110 is provided with a chamfer 130, i.e., the opening of the sound damping channel 120 towards the mounting cavity 110 forms an outwardly expanding structure, so that the process of loading the sound damping assembly 200 into the sound damping channel 120 from the mounting cavity 110 is smoother, and the sharp corner formed at the connection between the inner wall of the sound damping channel 120 and the inner wall of the mounting cavity 110 does not affect the installation of the sound damping assembly 200.

[0072] In an embodiment, the chamfer 130 has an arc-shaped surface 131. The arc-shaped surface 131 is smoother, further reducing the difficulty of aligning the sound damping assembly 200 with the sound damping channel 120, and helping to improve the assembly efficiency.

[0073] Of course, in other embodiments, the arc-shaped surface 131 of the chamfer 130 can also be replaced by an inclined surface.

[0074] It can be understood that the structure of the sound damping assembly 200 is not particularly limited in the present application. For example, the sound damping assembly 200 can only include one component that can play a sound damping effect, or can include multiple components. Next, the sound damping assembly 200 will be described by taking the case that the sound damping assembly 200 includes multiple components.

[0075] As shown in FIG. 6, the sound attenuation assembly 200 includes a sound attenuation frame 210, a first sound attenuation piece 220, and a second sound attenuation piece 230. The sound attenuation frame 210 abuts against the first limiting structure 121. The first sound attenuation piece 220 is located in the sound attenuation passage 120, and a gap is formed between the outer circumferential surface of the first sound attenuation piece 220 and the inner wall surface of the sound attenuation passage 120. The valve assembly 300 abuts against the side surface of the first sound attenuation piece 220 away from the sound attenuation frame 210. The second sound attenuation piece 230 is connected to the sound attenuation frame 210, and in the axial direction (the third direction D3) of the sound attenuation passage 120, the second sound attenuation piece 230 is arranged opposite to the first sound attenuation piece 220.

[0076] Next, the installation process of the expansion valve is described by taking the sound attenuation assembly 200 including the sound attenuation frame 210, the first sound attenuation piece 220, and the second sound attenuation piece 230 as an example.

[0077] First, the sound attenuation frame 210 and the second sound attenuation piece 230 are connected, for example, by riveting. Then, the assembled sound attenuation frame 210 and the second sound attenuation piece 230 are loaded into the sound attenuation passage 120 from the installation cavity 110 until the sound attenuation frame 210 abuts against the first limiting structure 121. After that, the first sound attenuation piece 220 is loaded and aligned with the sound attenuation passage 120 to load the first sound attenuation piece 220 into the sound attenuation passage 120. Finally, the valve assembly 300 and the mounting seat 100 are connected, and at least part of the valve assembly 300 extends into the installation cavity 110 and abuts against the first sound attenuation piece 220.

[0078] It is worth mentioning that, since the connecting part of the inner wall surface of the sound attenuation passage 120 and the inner wall surface of the installation cavity 110 is provided with a chamfer 130, the chamfer 130 is more conducive to the alignment of the first sound attenuation piece 220 with the sound attenuation passage 120 when the first sound attenuation piece 220 is loaded.

[0079] Referring back to FIG. 5, the sound attenuation frame 210 abuts against the first sound attenuation piece 220. In the embodiment of the present application, the sound attenuation frame 210 abuts against the first limiting structure 121, the valve assembly 300 abuts against the first sound attenuation piece 220, and the first sound attenuation piece 220 abuts against the sound attenuation frame 210, which further improves the firmness of the sound attenuation frame 210, the first sound attenuation piece 220, and the second sound attenuation piece 230 in the sound attenuation passage 120. The second limiting structure 111 is arranged 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 sound attenuation assembly 200 at the same time. When the valve assembly 300 is installed in place and abuts against the second limiting structure 111, the valve assembly 300 can press the sound attenuation assembly 200 to ensure that the sound attenuation assembly 200 is installed and fixed. 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 sound attenuation assembly 200 are located in the same plane.

[0080] It can be understood that the first sound attenuation member 220 and the second sound attenuation member 230 are sound attenuation filter screens, and are sintered from 75-mesh multi-layer stainless steel screens. The metal wires of the stainless steel screens can be directly 0.1 mm to 0.15 mm, for example, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, or 0.15 mm. The sound attenuation filter screens of the first sound attenuation member 220 and the second sound attenuation member 230 are each formed with sound attenuation holes of a small caliber. The sound attenuation holes uniformly refine the bubbles in the medium, achieving a sound attenuation effect.

[0081] As an example, as shown in FIG. 6, the first sound attenuation member 220 and the sound attenuation frame 210 are each provided with an impurity passage. The impurity passage of the first sound attenuation member 220 is defined as a first impurity passage 221, and the impurity passage of the sound attenuation frame 210 is defined as a second impurity passage 211. The first impurity passage 221 and the second impurity passage 211 are in communication. The first impurity passage 221 is arranged at a middle portion of the first sound attenuation member 220 and penetrates the first sound attenuation member 220 along a third direction D3. The flow passage cross-sectional area of the first impurity passage 221 is greater than the minimum flow passage cross-sectional area of the sound attenuation holes of the first sound attenuation member 220. The number of the second impurity passages 211 on the sound attenuation frame 210 can be multiple, and the multiple second impurity passages 211 are arranged at intervals along the circumference of the sound attenuation frame 210. Each second impurity passage 211 penetrates the sound attenuation frame 210 along the third direction D3. The flow passage cross-sectional area of each second impurity passage 211 is greater than the minimum flow passage cross-sectional area of the sound attenuation holes of the second sound attenuation member 230. The impurities in the fluid can pass through the impurity passages, so as to avoid the impurities in the fluid from being blocked in the sound attenuation holes and affecting the sound attenuation effect. The impurity passages and the sound attenuation holes are combined, achieving the sound attenuation effect and avoiding the sound attenuation holes from being blocked by the impurities.

[0082] Of course, in another embodiment, the first sound attenuation member 220 and the second sound attenuation member 230 are each provided with an impurity passage, and the impurity passage of the first sound attenuation member 220 and the impurity passage of the second sound attenuation member 230 are in communication. The flow passage cross-sectional area of the impurity passage of the first sound attenuation member 220 is greater than the minimum flow passage cross-sectional area of the sound attenuation holes of the first sound attenuation member 220. The flow passage cross-sectional area of the impurity passage of the second sound attenuation member 230 is greater than the minimum flow passage cross-sectional area of the sound attenuation holes of the second sound attenuation member 230. The impurities in the fluid can pass through the impurity passages, so as to avoid the impurities in the fluid from being blocked in the sound attenuation passages and affecting the sound attenuation effect. The impurity passages and the sound attenuation holes are combined, achieving the sound attenuation effect and avoiding the sound attenuation passages from being blocked by the impurities.

[0083] In yet another embodiment, the first sound attenuation member 220, the second sound attenuation member 230, and the sound attenuation frame 210 can each be provided with an impurity passage. The impurity passage of the first sound attenuation member 220, the impurity passage of the second sound attenuation member 230, and the impurity passage of the sound attenuation frame 210 are in communication.

[0084] As shown in FIG. 7 and FIG. 8, the expansion valve of the second embodiment of the present application is the same as the expansion valve of the first embodiment except that:

[0085] The side surface of the valve core 310 facing the sound attenuation passage 120 has a mounting groove 312, and part of the first sound attenuation piece 220 is located in the mounting groove 312. The groove bottom of the mounting groove 312 is farther away from the valve port 311 than the second limiting structure.

[0086] In the embodiment of the present application, by providing the mounting groove 312 on the valve core 310 and locating part of the first sound attenuation piece 220 in the mounting groove 312, the thickness of the first sound attenuation piece 220 can be increased without increasing the size of the expansion valve in the third direction D3, thereby improving the sound attenuation effect.

[0087] As shown in FIG. 9 and FIG. 10, the expansion valve of the third embodiment of the present application is the same as the expansion valve of the second embodiment except that:

[0088] The sound attenuation assembly 200 only includes the first sound attenuation piece 220, which abuts against the first limiting structure 121, and the valve core 310 of the valve assembly 300 abuts against the side surface of the first sound attenuation piece 220 away from the first limiting structure 121.

[0089] The sound attenuation assembly 200 in another embodiment of the present application includes two porous pieces arranged in the axial direction of the sound attenuation passage, and each porous piece is provided with impurity passages. In the projection plane perpendicular to the axial direction of the sound attenuation passage, the projection of the impurity passages of one porous piece does not coincide with the projection of the impurity passages of the other porous piece.

[0090] The uppermost porous piece can be referred to as sound attenuation block one, wherein the sound attenuation block one is a sintered wire mesh filter structure with a mesh number of 50-90 and 3-8 layers of sintered wire mesh. There is a through hole in the middle, which forms an impurity passage. The cross-sectional area of the impurity passage of the sound attenuation block one is half of the cross-sectional area of the valve port of the expansion valve, and the axial distance between the sound attenuation block one and the valve port of the expansion valve is ≥0.3mm. The through hole can also be arranged on the side edge of the sound attenuation block one.

[0091] The lowermost porous piece can be referred to as sound attenuation block two, wherein the sound attenuation block two is uniformly provided with two or more grooves on the circumference, and the grooves form impurity passages. The cross-sectional area of the impurity passages of the sound attenuation block two is greater than the cross-sectional area of the valve port of the expansion valve. The sound attenuation block two has a mesh number of 60 and 5 layers of sintered wire mesh, or a mesh number of 50-90 and 3-8 layers of sintered wire mesh. The diameter of the sound attenuation block two is smaller than that of the sound attenuation block one.

[0092] The limitation of the layer number and mesh number of the sintered wire mesh of the sound attenuation block one and the sound attenuation block two can reduce abnormal noise caused by discontinuous flow of large bubbles, refine two-phase flow bubbles, and make small bubbles flow uniformly through the valve port of the expansion valve, thereby reducing abnormal noise generated by unstable and discontinuous flow of large bubbles through the valve port.

[0093] The partition is arranged between the sound attenuation block one and the sound attenuation block two, so that a cavity is formed between the sound attenuation block one and the sound attenuation block two, the length of the cavity in the axial direction of the sound attenuation channel is defined as L1, and 0.6mm≤L1≤5mm. The partition has a through hole for communicating the impurity channel of the sound attenuation block and the gap between the sound attenuation block and the valve cavity. The range of the axial size of the cavity can reduce the pressure drop between the sound attenuation block one and the sound attenuation block two, reduce the influence on the flow, and ensure that the refrigerant can be fully buffered between the adjacent two sound attenuation blocks, so that the bubbles dispersed by the sound attenuation block can be more uniform, thereby improving the noise reduction effect.

[0094] The sound attenuation assembly further includes a sleeve, and the porous element is mounted in the sleeve. The sleeve wall has an opening to form a gap between the at least one porous element and the cavity wall of the valve cavity.

[0095] In the sound attenuation assembly 200 in this embodiment, the sound attenuation channel 120 is arranged between the first limiting structure 121 and the valve assembly 300. The first limiting structure 121 abuts and supports the sound attenuation assembly 200, and the valve assembly 300 presses the surface of the sound attenuation assembly 200 away from the first limiting structure 121.

[0096] The application also provides an air conditioning system including the expansion valve of any of the above embodiments.

[0097] Since the air conditioning system of the embodiment of the application includes the expansion valve of any of the above embodiments, the air conditioning system of the embodiment of the application has all the advantages and beneficial effects of any of the above embodiments, which will not be repeated here.

[0098] In summary, the expansion valve and the air conditioning system of the embodiment of the application have at least the following advantages and beneficial effects:

[0099] The expansion valve of the embodiment of the application has the following advantages. On the one hand, the installation process of the sound attenuation assembly 200 is relatively simple and convenient to operate, thereby reducing the cost. On the other hand, the sound attenuation assembly 200 is pressed by the valve assembly 300, so that the sound attenuation assembly 200 can be firmly arranged in the sound attenuation channel 120, thereby avoiding displacement of the sound attenuation assembly 200 in the sound attenuation channel 120 and affecting the sound attenuation effect.

[0100] It can be understood that the various embodiments / embodiments provided by the application can be combined with each other without contradiction, which will not be illustrated one by one here.

[0101] In the embodiments of the application, the terms "first", "second", "third" are only used for descriptive purpose and should not be understood as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connection", "fixing" and the like should be interpreted broadly, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be direct connection or indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0102] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the embodiments of the application and simplify the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, should not be understood as a limitation on the embodiments of the application.

[0103] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment", and the like, mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present application, the illustrative description 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.

[0104] The above is only the preferred embodiment of the application, and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the application should be included in the protection scope of the application.

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 channel; 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 protruded from the inner wall surface of the silencing 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 silencer 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 and the second limiting structure are limiting steps, and 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 defined 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 muffler.

8. The expansion valve according to claim 7, characterized in that The first muffler is in contact with the first limiting structure, and the valve assembly presses against a surface of the first muffler 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 a portion of the first muffler is located in the mounting groove.

9. The expansion valve according to claim 8, characterized in that The valve assembly includes 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 further comprises: 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 an impurity channel, 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 further comprises: 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 a silencer channel and an impurity channel, 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, wherein A chamfer is provided at the connection between the inner wall surface of the silencing channel and the inner wall surface of the installation cavity.

15. The expansion valve according to claim 14, characterized in that The chamfer has a curved surface.

16. The expansion valve according to claim 2, characterized in that The muffler assembly comprises: Two porous members are arranged along the axial direction of the silencer channel, and each of the porous members is provided with an impurity channel. In a projection plane perpendicular to the axial direction of the silencer channel, the projection of the impurity channel of one porous member does not overlap with the projection of the impurity channel of the other porous member.

17. The expansion valve according to claim 16, characterized in that The cross-sectional area of ​​the impurity channel is half the cross-sectional area of ​​the valve port of the expansion valve, the axial distance between the top porous part and the valve port of the expansion valve is ≥0.3 mm, and the cross-sectional area of ​​the impurity channel of the bottom porous part is larger than the cross-sectional area of ​​the valve port of the expansion valve.

18. The expansion valve according to claim 16, characterized in that The impurity channel of the uppermost porous member is arranged on the porous member, and more than two grooves are evenly distributed on the circumference of the lowermost porous member, and the grooves form the impurity channel.

19. The expansion valve according to claim 16, characterized in that The porous member is a sintered wire mesh filter structure with a mesh size of 50-90 meshes and 3 to 8 layers.

20. The expansion valve according to claim 16, wherein A separator is provided between the two porous members, and a cavity is formed between the separator and the two porous members. The length of the cavity along the axial direction of the muffler channel is defined as L1, and 0.6 mm ≤ L1 ≤ 5 mm.

21. The expansion valve according to claim 16, wherein The muffler assembly further comprises a sleeve, the porous member is installed in the sleeve, and the sleeve wall has an opening so as to form a gap between at least one porous member and the cavity wall of the valve cavity.

22. An air conditioning system, characterized in that: The expansion valve comprises the expansion valve according to any one of claims 1 to 21.

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