Expansion valve and air conditioning system having the same

Abstract

In an expansion valve and an air conditioning system having the same, the expansion valve further includes a valve body (1) and a spindle (2), a guide sleeve (3) provided within the valve body (1) and having a first mounting chamber (31) and a second mounting chamber (32) communicating with each other inside the guide sleeve (3), and a sound-dampening assembly (400) including a sound-dampening block set (100), the sound-dampening block set (100) including a plurality of sound-dampening passages (101) and at least one first passage (102), and a sound-dampening assembly (400) provided within the second mounting chamber (32), wherein at least a portion of the spindle (2) is provided within the first mounting chamber (31) and moves along the extending direction of the first mounting chamber (31), thereby solving the problem of the low noise reduction effect of the expansion valve in the prior art.

Description

Technical Field

[0001] This application claims the priority of a patent application filed with the China National Intellectual Property Administration on May 24, 2023, with an application number of 2023212829960 and an application title of "Expansion Valve and Air Conditioning System Having the Same".

[0002] This application relates to the technical field of noise reduction of electronic expansion valves, and specifically to an expansion valve and an air conditioning system having the same.

Background Art

[0003] An electronic expansion valve is a throttle element that can control the flow rate of refrigerant entering a cooling device according to a predetermined program, and as a control element, it is an important part of the intelligentization of the cooling system.

[0004] Currently, in the process of using some electronic expansion valves, the flow of the two-phase fluid is unstable, and the bubble sizes before and after throttling are different, so discontinuous noise is likely to occur and the noise value tends to be high.

Summary of the Invention

[0005] The main object of this application is to provide an expansion valve and an air conditioning system having the same, thereby solving the problem that the noise reduction effect of the expansion valve in the prior art is low.

[0006] To achieve the above object, according to a first aspect of this application, there is provided an expansion valve including a valve body and a spindle, further including a guide sleeve provided in the valve body and having a first mounting chamber and a second mounting chamber provided therein and communicating with each other inside, and a silencing assembly including a silencing block set, the silencing block set including a plurality of silencing passages and at least one first passing flow path and being provided in the second mounting chamber, wherein at least a part of the spindle is provided in the first mounting chamber and moves along the extending direction of the first mounting chamber.

[0007] Furthermore, the guide sleeve includes a guide member and a valve core seat, the first mounting chamber is provided within the guide member and the second mounting chamber is provided within the valve core seat, where the guide member is fitted into the valve core seat to provide an interference fit, or the guide member is provided at the end of the valve core seat and the guide member and valve core seat are integrally molded, or the valve core seat and valve body are integrally molded and the guide member is provided at the end of the valve core seat.

[0008] Furthermore, the expansion valve further includes a spacer provided within the guide sleeve and located between the first mounting chamber and the second mounting chamber, the spacer having a communication passage, the first mounting chamber and the second mounting chamber being connected by the communication passage, and the communication passage facing the spindle.

[0009] Furthermore, the minimum inner diameter of the first passage channel is larger than the maximum inner diameter of the connecting passage.

[0010] Furthermore, a predetermined gap is provided between the sound-absorbing block set and the spacer to form a mixing chamber between the sound-absorbing block set and the spacer, and at least a portion of the inner wall surface of the mixing chamber is a tapered or cylindrical surface. Furthermore, the expansion valve further includes a limiting portion provided at one end within the second mounting chamber and away from the first mounting chamber, the limiting portion extending from the inner wall surface of the second mounting chamber toward the middle portion of the second mounting chamber, and at least a portion of the sound-absorbing assembly is in contact with the limiting portion, thereby restricting the sound-absorbing assembly by the limiting portion.

[0011] Furthermore, the limiting portion includes a limiting end face that extends along the circumferential direction of the second mounting chamber, and the limiting end face is a tapered surface.

[0012] Furthermore, the sound-dampening assembly further includes a support frame provided within a second mounting chamber, the sound-dampening block set being provided on the support frame, at least a portion of the support frame in contact with a limiting portion, and the limiting portion blocking the support frame.

[0013] Furthermore, the flow cross-sectional area of ​​the first passage is larger than the minimum flow cross-sectional area of ​​the multiple sound-absorbing passages.

[0014] Furthermore, the sound-dampening block set includes the sound-dampening set body, and at least one first passage channel and multiple sound-dampening passages are all provided in the sound-dampening set body.

[0015] Furthermore, the sound-dampening assembly further includes a support frame provided within a second mounting chamber, and the sound-dampening block set further includes a sound-dampening set body provided on the support frame, with a plurality of sound-dampening passages and at least one first passage path provided in the sound-dampening set body.

[0016] Furthermore, the sound-dampening block set further includes a sound-dampening set body, and multiple sound-dampening passages and at least one first passage path are all provided in the sound-dampening set body; the sound-dampening assembly further includes a support frame provided in a second mounting chamber, and the support frame is provided with multiple second passage paths provided at intervals; and the sound-dampening set body is provided in the support frame.

[0017] Furthermore, the sound-dampening set body includes a first sound-dampening block provided on the first side of the support frame and a second sound-dampening block provided on the second side of the support frame, with both the first and second sound-dampening blocks being provided with multiple sound-dampening passages, and the first and / or second sound-dampening blocks being provided with at least one first passage.

[0018] Furthermore, the first sound-dampening block is provided with at least one first passage channel, and at least a portion of each first passage channel in the first sound-dampening block faces a plurality of sound-dampening passages in the second sound-dampening block.

[0019] Furthermore, the support frame includes a support body and a protruding body provided on the support body, the support body is provided with a mounting opening, a plurality of second passageways are provided around the mounting opening, the protruding body extends circumferentially so as to surround a mounting passage that communicates with the mounting opening, and the second sound-absorbing block is provided within the mounting passage.

[0020] Furthermore, at least a portion of the multiple second passageways in the support body are opposite to the multiple sound-absorbing passages in the first sound-absorbing block.

[0021] Furthermore, a restricting groove is provided on the inner wall surface of the mounting passage, and the restricting groove extends along the circumferential direction of the mounting passage, with the second sound-absorbing block being installed within the restricting groove.

[0022] Furthermore, the support frame further includes a flange provided on the edge of the support body and extending away from the protruding body, the flange being provided around the circumferential direction of the support body, and the first sound-absorbing block being provided on the flange.

[0023] Furthermore, the average inner diameter of the multiple sound-absorbing passages is less than 0.15 mm.

[0024] According to a second aspect of this application, an air conditioning system is provided which includes a refrigerant flow circuit and an expansion valve provided in the refrigerant flow circuit, wherein the expansion valve is the aforementioned expansion valve.

[0025] When the technical solution of the present application is applied, the expansion valve includes a valve body and a spindle, and the expansion valve further includes a guide sleeve and a silencing assembly. The guide sleeve is provided inside the valve body, and a first mounting chamber and a second mounting chamber communicating with each other are provided inside the guide sleeve. The silencing assembly includes a silencing block set, and the silencing block set includes a plurality of silencing passages and a plurality of first through-flow channels. The silencing assembly is provided inside the second mounting chamber. Here, at least a part of the spindle is provided inside the first mounting chamber and moves along the extending direction of the first mounting chamber. With this arrangement, the silencing assembly is integrated inside the guide sleeve. After the refrigerant flows through the silencing assembly, it directly flows into the first mounting chamber, that is, the refrigerant flows through the second mounting chamber and the first mounting chamber in sequence inside the guide sleeve. In this process, the noise caused by the discontinuous refrigerant flow due to the unstable two-phase fluid and the non-uniform bubble size in front of the valve is avoided. By integrating the valve seat core and the valve seat through the guide sleeve, the structure of the expansion valve is simplified and the assembly process is optimized.

Brief Description of the Drawings

[0026] The drawings in the specification constituting a part of the present application are for providing a further understanding of the present application. The schematic embodiments and their descriptions of the present application are used to explain the present application and do not constitute an undue limitation to the present application.

[0027] [Figure 1] The structural schematic diagram of an embodiment of the expansion valve according to the present application is shown. [Figure 2] The structural schematic diagram of the guide sleeve of the expansion valve according to the present application is shown. [Figure 3] The mounting schematic diagram of the silencing assembly in the expansion valve according to the present application is shown. [Figure 4] The structural schematic diagram of the support frame of the silencing assembly in the expansion valve according to the present application is shown. [Figure 5] The structural schematic diagram of the first embodiment of the first silencing block of the silencing assembly in the expansion valve according to the present application is shown. [Figure 6] This invention provides a schematic diagram of the structure of a second embodiment of the first sound-dampening block of the sound-dampening assembly in an expansion valve. [Figure 7] A schematic diagram of the structure of the air conditioning system according to this application is shown.

[0028] The above drawing includes the following reference numerals. 1 valve body, 2 spindle, 3 guide sleeve, 31 first mounting chamber, 32 second mounting chamber, 33 guide member, 34 valve core seat, 400 sound-dampening assembly, 5 spacer, 50 communication passage, 6 limiting section, 60 limiting end face, 100 Sound-dampening block set, 101 Sound-dampening passage, 102 First passage, 11 First sound-dampening block, 12 Second sound-dampening block, 200 Support frame, 201 Second passage, 20 Support body, 202 Mounting opening, 21 Protruding body, 210 Mounting passage, 211 Restricting groove, 22 Flange, 500 Refrigerant flow circuit, 501 Evaporator, 502 Condenser, 600 Expansion valve, 700 First filter, 800 Second filter. [Modes for carrying out the invention]

[0029] It should be noted that the embodiments and features of this application can be combined with each other, insofar as they do not contradict each other. The present application, along with its embodiments, will be described in detail below with reference to the drawings.

[0030] It should be noted that the terminology used herein is for the purpose of describing specific embodiments and is not intended to limit the exemplary embodiments described herein. Unless otherwise explicitly stated in the surrounding text, singular forms of terms used herein are also intended to include plural forms. Furthermore, it should be understood that when the terms “include” and / or “contain” are used herein, they identify the presence of features, procedures, operations, devices, assemblies, and / or combinations thereof.

[0031] Referring to Figures 1 to 6, the present application provides an expansion valve comprising a valve body 1 and a spindle 2, further comprising: a guide sleeve 3 provided within the valve body 1, the guide sleeve 3 having a first mounting chamber 31 and a second mounting chamber 32 communicating with each other internally; and a silencing assembly 400 comprising a silencing block set 100, the silencing block set 100 comprising a plurality of silencing passages 101 and at least one first passage 102, and the silencing assembly 400 provided within the second mounting chamber 32, wherein at least a portion of the spindle 2 is provided within the first mounting chamber 31 and moves along the extending direction of the first mounting chamber 31.

[0032] An expansion valve provided in this application comprises a valve body 1 and a spindle 2, and further comprises a guide sleeve 3 and a silencing assembly 400, the guide sleeve 3 being provided within the valve body 1 and comprising a first mounting chamber 31 and a second mounting chamber 32 communicating with each other, wherein at least a portion of the spindle 2 is provided within the first mounting chamber 31 and moves along the extending direction of the first mounting chamber 31, the silencing assembly 400 comprising a silencing block set 100, the silencing block set 100 comprising a plurality of silencing passages 101 and a plurality of first passages 102, and the silencing assembly 400 being provided within the second mounting chamber 32. With this configuration, the sound-absorbing assembly 400 is integrated into the guide sleeve 3, and after the refrigerant flows through the sound-absorbing assembly 400, it flows directly into the first mounting chamber 31. That is, the refrigerant flows sequentially through the second mounting chamber 32 and the first mounting chamber 31 within the guide sleeve 3. In this process, noise caused by discontinuous refrigerant flow resulting from unstable two-phase fluid and uneven bubble sizes before the valve is avoided. By integrating the valve seat core and valve seat via the guide sleeve 3, the structure of the expansion valve is simplified and the assembly process is optimized.

[0033] In this application, the guide sleeve 3 includes a guide member 33 and a valve core seat 34, the first mounting chamber 31 is provided in the guide member 33 and the second mounting chamber 32 is provided in the valve core seat 34, where the guide member 33 is fitted into the valve core seat 34 and interference-fitted to the valve core seat 34, so that in the assembly process the valve core seat 34 is first welded and fixed between the valve body 1 and the guide member 33 is then fitted into the end of the valve core seat 34 and interference-fitted to the valve core seat 34, or the guide member 33 is provided at the end of the valve core seat 34 and the guide member 33 and the valve core seat 34 are integrally molded structures, or the valve core seat 34 and the valve body 1 are integrally molded structures and the guide member 33 is provided at the end of the valve core seat 34.

[0034] Specifically, the expansion valve further includes a spacer 5 provided within the guide sleeve 3 and positioned between the first mounting chamber 31 and the second mounting chamber 32. The spacer 5 is provided with a communication passage 50, which connects the first mounting chamber 31 and the second mounting chamber 32, and the communication passage 50 faces the spindle 2. By separating the first mounting chamber 31 and the second mounting chamber 32 with the spacer 5, the flow rate of the refrigerant can be easily controlled.

[0035] Preferably, the minimum inner diameter of the first passage channel 102 is larger than the maximum inner diameter of the connecting passage 50. With this configuration, after the finely divided bubbles are mixed and then mixed with the refrigerant in the first passage channel 102, the flow velocity is adjusted by the change in the inner diameter of the first passage channel 102 and the connecting passage 50.

[0036] By providing a predetermined gap between the sound-dampening set body and the spacer 5, a mixing chamber is formed between the sound-dampening set body and the spacer 5, and at least a portion of the inner wall surface of the mixing chamber is a tapered or cylindrical surface. With this configuration, bubbles of different sizes are uniformly mixed within the mixing chamber.

[0037] In a specific implementation, to facilitate the installation of the sound-absorbing assembly 400, the expansion valve further includes a limiting portion 6 provided within the second mounting chamber 32 and at one end away from the first mounting chamber 31, the limiting portion 6 extending from the inner wall surface of the second mounting chamber 32 toward the middle portion of the second mounting chamber 32, and at least a portion of the sound-absorbing assembly 400 contacts the limiting portion 6, thereby restricting the sound-absorbing assembly 400 by the limiting portion 6.

[0038] Specifically, the limiting portion 6 includes a limiting end face 60, which extends along the circumferential direction of the second mounting chamber 32, and the limiting end face 60 is a tapered surface. Here, the limiting end face 60 surrounds and forms the diameter reduction structure, limiting the sound-dampening assembly 400 and simplifying the structure and assembly process.

[0039] In specific implementation, the sound-dampening assembly 400 includes a support frame 200 provided within the second mounting chamber 32, the sound-dampening set body is mounted on the support frame 200, at least a portion of the support frame 200 is in contact with the limiting portion 6, and the limiting portion 6 blocks the support frame 200.

[0040] In this application, the flow cross-sectional area of ​​the first passage channel 102 is larger than the minimum flow cross-sectional area of ​​the plurality of sound-absorbing passages 101.

[0041] The sound-absorbing block set 100 is provided with a plurality of sound-absorbing passages 101 and at least one first passage channel 102, and the flow cross-sectional area of ​​the first passage channel 102 is made larger than the minimum flow cross-sectional area of ​​the plurality of sound-absorbing passages 101. In this way, as the medium passes through the sound-absorbing block set 100, impurities in the medium can pass through the first passage channel 102, and it is possible to prevent impurities in the medium from clogging the sound-absorbing passages 101 and affecting the sound-absorbing effect of the sound-absorbing block set 100.

[0042] In the first embodiment of this application, the sound-absorbing block set 100 includes a sound-absorbing set body, and at least one first passage channel 102 and a plurality of sound-absorbing passages 101 are all provided in the sound-absorbing set body. Here, the sound-absorbing set body is provided at the valve port of a valve body, or inside a pipe, or at a position where the valve body and the pipe are connected, so that it can perform a sound-absorbing effect as the medium flows through the sound-absorbing set body, and by providing the first passage channel 102, impurities in the medium can be allowed to flow smoothly, and clogging of the sound-absorbing passages 101 that would affect the sound-absorbing effect is avoided.

[0043] In the second embodiment provided by this application, the sound-dampening assembly 400 further includes a support frame 200, which is provided in a second mounting chamber 32, and the sound-dampening block set 100 further includes a sound-dampening set body, which is provided on the support frame 200, and a plurality of sound-dampening passages 101 and at least one first passage 102 are provided on the sound-dampening set body. This arrangement maximizes the sound-dampening effect of the sound-dampening set body, and by providing a separate support frame 200 and a first passage 102 on the support frame 200, impurities in the medium are allowed to pass through the first passage 102, the sound-dampening set body and the support frame 200 engage with each other to achieve a sound-dampening effect, and also avoids the problem of the sound-dampening passages 101 becoming clogged with impurities.

[0044] In the third embodiment provided by this application, the sound-dampening block set 100 further includes a sound-dampening set body, wherein a plurality of sound-dampening passages 101 and at least one first passage 102 are all provided in the sound-dampening set body, and the sound-dampening assembly further includes a support frame 200 provided in a second mounting chamber 32, wherein a plurality of second passages 201 are provided in the support frame 200, the plurality of second passages 201 are provided at intervals, and the sound-dampening set body is provided in the support frame 200. According to the sound-dampening assembly in the embodiment of this application, the assembly includes a sound-dampening block set 100 and a support frame 200, wherein the sound-dampening block set body of the sound-dampening block set 100 is provided with a plurality of sound-dampening passages 101 and at least one first passage 102, the flow cross-sectional area of ​​the first passage 102 is larger than the minimum flow cross-sectional area of ​​the plurality of sound-dampening passages 101, the support frame 200 is provided with a plurality of second passages 201, the plurality of second passages 201 are provided at intervals, and the sound-dampening block set 100 is provided on the support frame 200. Here, the multiple sound-absorbing passages 101 in the sound-absorbing block set 100 reduce noise during the passage of the medium, and the first passage channel 102 makes the flow cross-sectional area of ​​the first passage channel 102 larger than the minimum flow cross-sectional area of ​​the multiple sound-absorbing passages 101. In this way, impurities in the medium can pass through the first passage channel 102 without clogging the sound-absorbing block set 100 during the passage of the medium, and in cooperation with the second passage channel 201 in the support frame 200, the sound-absorbing effect is ensured, and the reliability of the sound-absorbing assembly is improved by preventing dirt and clogging in the first passage channel 102 in the sound-absorbing block set 100.

[0045] Specifically, the sound-dampening set body includes a first sound-dampening block 11 provided on the first side of the support frame 200 and a second sound-dampening block 12 provided on the second side of the support frame 200, wherein the projected area of ​​the orthographic projection of the first sound-dampening block 11 is larger than the projected area of ​​the orthographic projection of the second sound-dampening block 12, or the orthographic projections of the first sound-dampening block 11 and the second sound-dampening block 12 overlap, and both the first sound-dampening block 11 and the second sound-dampening block 12 are provided with a plurality of sound-dampening passages 101, and the first sound-dampening block 11 and / or the second sound-dampening block 12 are provided with at least one first passage 102. In specific implementations, the first sound-dampening block 11 and the second sound-dampening block 12 are each provided with at least one first passage 102, or only the first sound-dampening block 11 is provided with one first passage 102 and the second sound-dampening block 12 is provided with only a plurality of sound-dampening passages 101. During use, as the medium enters and exits the sound-absorbing assembly, air bubbles in the medium are miniaturized into microbubbles by the multiple sound-absorbing passages 101 in the first sound-absorbing block 11 and the multiple sound-absorbing passages 101 in the second sound-absorbing block 12. Simultaneously, the provision of a first passage channel 102 prevents all contamination and clogging of the multiple sound-absorbing passages 101. Furthermore, the first sound-absorbing block 11 and the second sound-absorbing block 12 are provided sequentially at intervals along the direction of the medium flow passage. In this way, the sound-absorbing effect of the sound-absorbing assembly is improved by the cooperative action of the first sound-absorbing block 11 and the second sound-absorbing block 12.

[0046] Here, orthographic projection refers to the projection of the first sound-dampening block 11 and the second sound-dampening block 12 onto the horizontal plane.

[0047] In the specific implementation process, the first sound-absorbing block 11 is provided with at least one first passage channel 102, and at least a portion of each first passage channel 102 in the first sound-absorbing block 11 faces a plurality of sound-absorbing passages 101 in the second sound-absorbing block 12. With this configuration, when the medium flows through the plurality of sound-absorbing passages 101, if there are too many impurities in the medium, some of the medium will remain in the second sound-absorbing block 12, while other impurities will flow out through the plurality of first passage channels 102 in the first sound-absorbing block 11. This prevents dirt and blockages from occurring in all of the sound-absorbing passages 101 in the first sound-absorbing block 11 and the second sound-absorbing block 12, which would affect the sound-absorbing effect. When the medium flows in the reverse direction, impurities remaining in the second sound-absorbing block 12 can be directly carried out.

[0048] In the first embodiment of the first sound-dampening block 11 of this application, as shown in Figure 5, a first passage channel 102 is provided in the middle part of the first sound-dampening block 11, and in this case, the sound-dampening passage 101 in the second sound-dampening block 12 is provided in the middle part of the second sound-dampening block 12.

[0049] In a second embodiment of the first sound-dampening block 11 of this application, as shown in Figure 6, a plurality of first passage channels 102 are provided on the edge of the first sound-dampening block 11, and in this case, the sound-dampening passage 101 in the second sound-dampening block 12 is provided on the edge of the second sound-dampening block 12.

[0050] In the embodiment provided by this application, as shown in Figure 3, the support frame 200 includes a support body 20 and a protruding body 21 provided on the support body 20, the support body 20 is provided with a mounting opening 202, a plurality of second passage channels 201 are provided around the mounting opening 202, the protruding body 21 extends circumferentially so as to surround a mounting passage 210 communicating with the mounting opening 202, and the second sound-dampening block 12 is provided within the mounting passage 210. In the process of the medium flowing, some of the medium is dampened by the sound-dampening passage 101 in the second sound-dampening block 12, and some of the other medium flows through the second passage channel 201 in the support body 20 to the sound-dampening passage 101 in the first sound-dampening block 11, thereby achieving a sound-dampening effect. At the same time, impurities in the medium can directly pass through the second passage channel 201 and adhere to the first sound-absorbing block 11. When the medium flows in the reverse direction, the impurities are carried out of the first sound-absorbing block 11 and flow out through the second passage channel 201 in the support body 20, thereby ensuring a sound-absorbing effect while also performing a cleaning action on the first sound-absorbing block 11 and the second sound-absorbing block 12.

[0051] Specifically, at least a portion of the multiple second passage channels 201 in the support body 20 faces the multiple sound-absorbing passages 101 in the first sound-absorbing block 11. Since the sound-absorbing capacity of the second passage channels 201 for the medium is lower than that of the sound-absorbing passages 101, by having at least a portion of the multiple second passage channels 201 in the support body 20 face the multiple sound-absorbing passages 101 in the first sound-absorbing block 11, the medium is absorbed by the sound-absorbing passages 101 in the first sound-absorbing block 11 immediately after flowing through the second passage channels 201, thus preventing excessive noise.

[0052] To facilitate the installation of the second sound-absorbing block 12, a restricting groove 211 is provided on the inner wall surface of the installation passage 210. The restricting groove 211 extends along the circumferential direction of the installation passage 210, and the second sound-absorbing block 12 is installed within the restricting groove 211. In this way, the second sound-absorbing block 12 is secured by the two opposing groove walls of the restricting groove 211, so that it can maintain a stable state even when subjected to impact from the medium.

[0053] In the specific implementation process, the support frame 200 further includes a flange 22 provided on the edge of the support body 20 and extending away from the protruding body 21, the flange 22 being provided around the circumferential direction of the support body 20, and the first sound-absorbing block 11 being provided on the flange 22. By providing the flange 22, a gap is created between the first sound-absorbing block 11 and the support body 20, and this gap acts as a mitigation for the medium, preventing the medium from directly colliding with the support body 20 after flowing through the first sound-absorbing block 11, or directly colliding with the first sound-absorbing block 11 after flowing through the support body 20, which would result in large energy losses of the medium and affect the operation of the entire medium circulation system. Preferably, the distance from the connecting end face of the first sound-absorbing block 11 to the end face of the mounting opening 202 formed by surrounding it with the support body 20 (i.e., the height of the flange 22) is 0.2 mm to 3 mm, preferably 0.8 mm. In this way, the distance between the first sound-absorbing block 11 and the second sound-absorbing block 12 is ensured to achieve an optimal noise reduction effect.

[0054] Preferably, the average inner diameter of the multiple sound-absorbing passages 101 is less than 0.15 mm. In this way, the bubbles in the medium are uniformly miniaturized, improving the sound-absorbing effect.

[0055] The sound-dampening assembly in this application can be fixed to a valve body member, a joint, or a connection point between a joint and a valve body, and can perform a sound-dampening effect as the medium passes through the sound-dampening assembly.

[0056] The cooperative action of the first sound-absorbing block 11 and the second sound-absorbing block 12 optimizes the noise reduction effect. Furthermore, since the first passage channel 102 and the second passage channel 201 are provided, the first passage channel 102 and the second passage channel 201 complement each other's influence on the medium pressure and noise reduction, and the problem of the sound-absorbing passage 101 becoming easily clogged by impurities in the medium can also be solved.

[0057] Here, a valve opening is provided within the valve body 1, and both the sound-absorbing block set 100 and the support frame 200 are mounted inside the valve opening. The flow cross-sectional area of ​​the first passage channel 102 is at least half the cross-sectional area of ​​the valve opening. The flow cross-sectional area of ​​the second passage channel 201 is at least half the cross-sectional area of ​​the valve opening. In this way, it is possible to avoid the occurrence of dirt and blockages in the sound-absorbing passage 101, and to avoid a significant pressure drop occurring during the process of the medium passing through the first passage channel 102 or the second passage channel 201.

[0058] As shown in Figure 7, this application provides an air conditioning system comprising a refrigerant flow circuit 500 and an expansion valve 600, wherein the expansion valve 600 is provided in the refrigerant flow circuit 500, and the expansion valve 600 is the aforementioned expansion valve 600.

[0059] The air conditioning system further includes a filter provided in the refrigerant flow circuit 500, wherein the flow cross-sectional area of ​​the first passage path 102 in the sound-insulating assembly is greater than the flow cross-sectional area of ​​the minimum mesh opening of the filter in the filter.

[0060] Specifically, the filter includes a first filter 700 and a second filter 800, which are spaced apart in the refrigerant flow circuit 500, and the expansion valve 600 is located between the first filter 700 and the second filter 800. Herein, an evaporator 501 and a condenser 502 are further provided in the refrigerant flow circuit 500. In actual application, the two-phase refrigerant circulates within the refrigerant flow circuit 500, and as the refrigerant passes through the expansion valve 600, the silencing passages 101 of the first silencing block 11 and the second silencing block 12 in the silencing assembly atomize the bubbles in the refrigerant, thereby achieving a silencing effect. Furthermore, by providing a first passage 102 and a second passage 201, it is possible to prevent the silencing passage 101 from becoming clogged with impurities in the refrigerant. Impurities not filtered by the first filter 700 pass through the first passage 102 and the second passage 201 and are subsequently filtered using the second filter 800, thereby improving the reliability of the air conditioning system's operation. In the event that the silencing passage 101 becomes clogged with impurities, the refrigerant can carry out the impurities in the silencing passage 101 when flowing in the reverse direction, thus performing a cleaning action and delaying the time it takes for dirt to accumulate and the passage to become clogged.

[0061] From the above explanation, it can be seen that the above-described embodiment of this application achieves the following technical effects.

[0062] An expansion valve provided in this application comprises a valve body 1 and a spindle 2, and further comprises a guide sleeve 3 and a silencing assembly 400, wherein the guide sleeve 3 is provided within the valve body 1 and comprises a first mounting chamber 31 and a second mounting chamber 32 communicating with each other, wherein at least a portion of the spindle 2 is provided within the first mounting chamber 31 and moves along the extending direction of the first mounting chamber 31, and the silencing assembly 400 comprises a silencing block set 100, which comprises a plurality of silencing passages 101 and a plurality of first passages 102, and the silencing assembly 400 is provided within the second mounting chamber 32. With this configuration, the sound-dampening assembly 400 is integrated into the guide sleeve 3, and during the process of assembling the valve body, the guide sleeve 3 is directly attached to the valve body 1 and engages with the spindle 2, allowing the refrigerant to flow directly into the first mounting chamber 31 after flowing through the sound-dampening assembly 400. In other words, the refrigerant flows sequentially through the second mounting chamber 32 and the first mounting chamber 31 within the guide sleeve 3, avoiding noise caused by discontinuous refrigerant flow resulting from unstable two-phase fluid and uneven bubble sizes before the valve. By integrating the valve seat core and valve seat via the guide sleeve 3, the structure of the expansion valve is simplified and the assembly process is optimized.

[0063] It should be noted that the terms “First,” “Second,” etc., in the specification, claims, and drawings of this application are used to distinguish similar elements and not to describe specific procedures or sequences. It should be understood that the data used in this manner is interchangeable, where appropriate, so that the embodiments of this application described herein can be carried out, for example, by procedures other than those illustrated or described herein. Furthermore, the terms “includes” and “has,” and any variations thereof, are intended to be non-exclusive. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to those steps or units explicitly listed, and may include steps or units not explicitly listed, or other steps or units specific to those processes, methods, products, or apparatus.

[0064] For the sake of clarity, spatially relative terms such as "on top of," "above," "on the top surface," and "on the top surface" may be used here to describe the spatial relationship between one illustrated device or feature and another. It should be understood that spatially relative terms are intended to encompass different orientations during use or operation, in addition to the orientation of the device as depicted in the drawing. For example, if a device in the drawing is oriented in the opposite direction, it may be described as a device "above another device or structure" or "on top of another device or structure," and then positioned "below another device or structure" or "below another device or structure." Thus, the exemplary term "above" may include both orientations of "above" and "below." The device may be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here may be interpreted accordingly.

[0065] The foregoing are merely preferred embodiments of this application and are not intended to limit it, and various modifications and changes are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., within the spirit and principles of this application should be within the scope of protection of this application.

Claims

1. An expansion valve comprising a valve body (1) and a spindle (2), A guide sleeve (3) provided within the valve body (1), the guide sleeve (3) having a first mounting chamber (31) and a second mounting chamber (32) that are in communication with each other inside, A sound-dampening assembly (400) comprising a sound-dampening block set (100), wherein the sound-dampening block set (100) comprises a plurality of sound-dampening passages (101) and at least one first passage (102), and is provided within the second mounting chamber (32), wherein at least a portion of the spindle (2) is provided within the first mounting chamber (31) and moves along the extending direction of the first mounting chamber (31), the expansion valve.

2. The guide sleeve (3) includes a guide member (33) and a valve core seat (34), the first mounting chamber (31) is provided within the guide member (33), and the second mounting chamber (32) is provided within the valve core seat (34). Here, the guide member (33) is fitted onto the valve core seat (34) and interferes with the valve core seat (34), or The guide member (33) is provided at the end of the valve core seat (34), and the guide member (33) and the valve core seat (34) are integrally molded, or The expansion valve according to claim 1, wherein the valve core seat (34) and the valve body (1) are integrally molded, and the guide member (33) is provided at the end of the valve core seat (34).

3. The expansion valve according to claim 2, further comprising a spacer (5) provided within the guide sleeve (3) and positioned between the first mounting chamber (31) and the second mounting chamber (32), wherein the spacer (5) is provided with a communication passage (50), the first mounting chamber (31) and the second mounting chamber (32) are connected by the communication passage (50), and the communication passage (50) faces the spindle (2).

4. The expansion valve according to claim 3, wherein the minimum inner diameter of the first passage channel (102) is greater than the maximum inner diameter of the communication passage (50).

5. By providing a predetermined distance between the sound-dampening block set (100) and the spacer (5), a mixing chamber is formed between the sound-dampening block set (100) and the spacer (5). The expansion valve according to claim 3, wherein at least a portion of the inner wall surface of the mixing chamber is a tapered surface or a cylindrical surface.

6. The expansion valve according to claim 2, further comprising a limiting portion (6) provided at one end of the second mounting chamber (32) away from the first mounting chamber (31), wherein the limiting portion (6) extends from the inner wall surface of the second mounting chamber (32) toward the middle portion of the second mounting chamber (32), and at least a portion of the silencing assembly (400) is in contact with the limiting portion (6), thereby restricting the silencing assembly (400) by the limiting portion (6).

7. The expansion valve according to claim 6, wherein the restricting portion (6) includes a restricting end face (60), the restricting end face (60) extends along the circumferential direction of the second mounting chamber (32), and the restricting end face (60) is a tapered surface.

8. The sound-dampening assembly (400) is The expansion valve according to claim 6, further comprising a support frame (200) provided within the second mounting chamber (32), wherein the sound-dampening block set (100) is provided on the support frame (200), and at least a portion of the support frame (200) is in contact with the limiting portion (6), and the limiting portion (6) blocks the support frame (200).

9. The expansion valve according to claim 2, wherein the flow cross-sectional area of ​​the first passage (102) is larger than the minimum flow cross-sectional area of ​​the plurality of sound-absorbing passages (101).

10. The expansion valve according to claim 2, wherein the sound-dampening block set (100) includes a sound-dampening set body, and at least one of the first passage channels (102) and a plurality of sound-dampening passages (101) are all provided in the sound-dampening set body.

11. The sound-dampening assembly (400) further includes a support frame (200), the support frame (200) is provided within the second mounting chamber (32), The expansion valve according to claim 2, wherein the sound-absorbing block set (100) further includes a sound-absorbing set body provided on the support frame (200), and the plurality of sound-absorbing passages (101) and at least one of the first passages (102) are provided on the sound-absorbing set body.

12. The sound-dampening block set (100) further includes a sound-dampening set body, and the plurality of sound-dampening passages (101) and at least one of the first passages (102) are all provided in the sound-dampening set body. The expansion valve according to claim 2, wherein the sound-dampening assembly (400) further includes a support frame (200) provided in the second mounting chamber (32), the support frame (200) is provided with a plurality of second passages (201), the plurality of second passages (201) are provided at intervals, and the sound-dampening set body is provided on the support frame (200).

13. The aforementioned sound-dampening set main body is A first sound-dampening block (11) is provided on the first side of the support frame (200), The first sound-dampening block (11) and the second sound-dampening block (12) are provided on the second side of the support frame (200), and both the first sound-dampening block (11) and the second sound-dampening block (12) are provided with the plurality of sound-dampening passages (101). The expansion valve according to claim 12, wherein the first sound-dampening block (11) and / or the second sound-dampening block (12) are provided with at least one of the first passage channels (102).

14. The expansion valve according to claim 13, wherein the first sound-dampening block (11) is provided with at least one first passage (102), and at least a portion of each first passage (102) in the first sound-dampening block (11) faces the plurality of sound-dampening passages (101) in the second sound-dampening block (12).

15. The support frame (200) includes a support body (20) and a protruding body (21) provided on the support body (20). A mounting opening (202) is provided in the support body (20), and a plurality of second passage channels (201) are provided around the mounting opening (202). The expansion valve according to claim 13, wherein the protruding body (21) extends circumferentially so as to surround a mounting passage (210) that communicates with the mounting opening (202), and the second sound-absorbing block (12) is provided within the mounting passage (210).

16. The expansion valve according to claim 15, wherein at least a portion of the plurality of second passages (201) in the support body (20) faces the plurality of sound-absorbing passages (101) in the first sound-absorbing block (11).

17. The expansion valve according to claim 15, wherein a restricting groove (211) is provided on the inner wall surface of the mounting passage (210), the restricting groove (211) extends along the circumferential direction of the mounting passage (210), and the second sound-absorbing block (12) is provided within the restricting groove (211).

18. The expansion valve according to claim 15, wherein the support frame (200) further includes a flange (22) provided on the edge of the support body (20) and extending away from the protruding body (21), the flange (22) is provided around the circumferential direction of the support body (20), and the first sound-absorbing block (11) is provided on the flange (22).

19. The expansion valve according to claim 1, wherein the average inner diameter of the multiple sound-absorbing passages (101) is less than 0.15 mm.

20. An air conditioning system comprising a refrigerant flow circuit (500) and an expansion valve (600), wherein the expansion valve (600) is provided in the refrigerant flow circuit (500), and the expansion valve (600) is the expansion valve (600) described in any one of claims 1 to 19.

Images