Valve device

Abstract

The invention discloses a valve device which comprises a valve body component, a silencing component and a first connecting pipe. The valve body component is provided with a valve port channel part, a first valve cavity part and a second valve cavity part, the first valve cavity part is communicated with the second valve cavity part through the valve port channel part, the first valve cavity part is located above the valve port channel part, and the second valve cavity part is located below the valve port channel part; the first connecting pipe is communicated with the second valve cavity part; at least part of the silencing part is located in the second valve cavity part, and a first cavity is formed between the upper end face of the silencing part and the upper cavity wall of the second valve cavity part; the silencing part comprises more than two porous parts, the porous parts are arranged at intervals in the axial direction of the valve body part, the porous parts are provided with through axial channels, and the axial channels of every two adjacent porous parts are arranged in a staggered mode in the axial direction. The structural arrangement of the valve device can reduce noise caused by refrigerant flowing.

Description

Technical Field

[0001] The present application relates to the field of refrigeration control technology, and in particular to a valve device. Background Art

[0002] Valve devices, such as electronic expansion valves, as throttling elements, have the advantages of high regulation accuracy and precise temperature control, and are widely used in the fields of air conditioning, refrigeration and freezing.

[0003] When the valve device is working, when the refrigerant flows through the valve port channel of the valve device, the flow area changes dramatically, causing the pressure and flow rate of the refrigerant to change dramatically, which is likely to cause refrigerant noise, thereby affecting the comfort experience of people in the application environment.

[0004] Therefore, how to reduce the refrigerant noise generated when the valve device is working has become one of the key topics of concern in the industry. Summary of the invention

[0005] The purpose of the present application is to provide a valve device which can reduce the noise caused by the flow of refrigerant through structural optimization and improve the noise comfort of the valve device in the system.

[0006] In order to solve the above technical problems, the present application provides a valve device, including a valve body component, a muffler component and a first connecting pipe;

[0007] The valve body component comprises a valve port channel portion, a first valve cavity portion and a second valve cavity portion, the first valve cavity portion is communicated with the second valve cavity portion through the valve port channel portion, the first valve cavity portion is located above the valve port channel portion, and the second valve cavity portion is located below the valve port channel portion; the first connecting pipe is communicated with the second valve cavity portion;

[0008] At least part of the silencer component is located in the second valve cavity portion, and a first cavity is defined between the upper end surface of the silencer component and the upper cavity wall of the second valve cavity portion; the silencer component comprises more than two porous components, each of which is arranged at intervals along the axial direction of the valve body component, and each of the porous components has an axial passage extending therethrough, and the axial passages of two adjacent porous components are staggered in the axial direction.

[0009] In a feasible solution, the axial channel includes a through hole away from the outer peripheral wall of the porous member, and the aperture of the through hole is larger than the inner diameter of the valve port channel portion.

[0010] In a feasible solution, the axial channel includes a plurality of notches located on the outer peripheral wall of the porous member, and the effective flow area of ​​each of the notches of the porous member is greater than 1.1 times the flow area of ​​the valve port channel portion.

[0011] In a feasible solution, the axial height of the first chamber is L1, a second chamber is provided between two adjacent porous members, and the axial height of the second chamber is L2, wherein L1≥0.3mm, 0.3mm≤L2≤5mm.

[0012] In one feasible solution, the first connecting pipe includes a large diameter pipe portion, at least a portion of the large diameter pipe portion is fixedly inserted in the second valve cavity portion, and the silencer component is arranged in the cavity of the large diameter pipe portion.

[0013] In a feasible solution, the outer tube wall of the large diameter tube portion has a recessed portion that is radially concave inward, and the large diameter tube portion includes the first guide wall and the second guide wall, the first guide wall and the second guide wall are respectively located on both sides of the recessed portion, the first guide wall and the second guide wall are both interference fit with the circumferential cavity wall of the second valve cavity portion, and the large diameter tube portion is welded and fixed to the valve body component.

[0014] In an achievable solution, the muffler component includes an annular gasket, which is disposed between two adjacent porous members, and is used to define the relative position of the two adjacent porous members in the axial direction, and the annular gasket is interference-fitted with the large-diameter pipe portion;

[0015] A stopper is provided in the lumen of the first connecting pipe, and the lower end surface of the silencer component abuts against the stopper.

[0016] In one feasible solution, the first connecting pipe also includes a transition pipe portion and a small diameter pipe portion, the small diameter pipe portion is connected to the large diameter pipe portion through the transition pipe portion, the inner diameter of the transition pipe portion gradually decreases along the direction from the large diameter pipe portion to the small diameter pipe portion, and the stop portion is arranged at the transition pipe portion or the end of the large diameter pipe portion adjacent to the transition pipe portion.

[0017] In a feasible solution, the inner diameter of the valve port channel portion is D1, the inner diameter of the large diameter tube portion is D2, and D2≥2D1.

[0018] In a feasible solution, the upper end portion of the first connecting pipe is fixedly inserted in the second valve cavity portion, and the second valve cavity portion has a limiting cavity wall facing the first connecting pipe, and the limiting cavity wall is away from the valve port channel portion relative to the upper cavity wall; the upper end surface of the silencer component abuts against the limiting cavity wall, and the lower end surface of the silencer component abuts against the upper tube end wall of the first connecting pipe.

[0019] In one feasible solution, the first connecting pipe includes a first lumen and a second lumen, the first lumen is arranged relative to the second lumen and close to the second valve cavity, and the inner diameter of the first lumen is greater than the inner diameter of the second lumen.

[0020] In a feasible solution, the silencer component includes an annular gasket, which is arranged between two adjacent porous members, and is used to limit the relative position of the two adjacent porous members in the axial direction, and the annular gasket is interference fit with the second valve cavity portion.

[0021] In a feasible solution, the inner diameter of the first chamber is D4, the inner diameter of the valve port channel is D1, and D4≥1.1D1.

[0022] In the application of the valve device provided in the embodiment of the present application, when the refrigerant flows from the first connecting pipe to the second connecting pipe, or from the second connecting pipe to the first connecting pipe 31, most of the refrigerant will pass through the porous parts of the silencing component, and the bubbles in the refrigerant will be broken up layer by layer by the porous parts, so that the gas phase and liquid phase in the refrigerant are distributed more evenly, improving the fluid state of the refrigerant after throttling or when flowing through the throttling part, making the sound of the refrigerant flow more gentle and the loudness relatively reduced, so as to have a better noise reduction effect, thereby improving the comfort of the human ear in the application environment of the valve device.

[0023] At the same time, because the porous parts have a penetrating axial channel and the axial channels of adjacent porous parts are staggered in the axial direction, when the valve device is used for a long time and causes the porous parts to be blocked, the refrigerant can flow through the staggered axial channels and can pass through other porous parts during the flow to achieve noise reduction, thereby avoiding the situation where the valve device cannot work normally due to blockage of the silencer component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a cross-sectional schematic diagram of a valve device according to an embodiment of the present application;

[0025] FIG2 is a partial enlarged view of the portion A in FIG1 ;

[0026] FIG3 is a partial enlarged view of the portion B in FIG2 ;

[0027] FIG4 is a partial cross-sectional schematic diagram of the valve seat in FIG1 ;

[0028] FIG5 is a cross-sectional schematic diagram of the silencer component and the first pipe after being assembled in FIG1 ;

[0029] FIG6 is a schematic diagram of the structure of a porous member and a first connecting pipe in a modified embodiment;

[0030] FIG7 is a partial cross-sectional schematic diagram of a valve device in another embodiment provided in the present application;

[0031] FIG8 is a partial enlarged view of portion C in FIG7;

[0032] FIG9 is a partial cross-sectional schematic diagram of the valve seat in FIG7 ;

[0033] FIG. 10 is a partial cross-sectional schematic diagram of the first connecting pipe in FIG. 7 .

[0034] Description of reference numerals:

[0035] Valve body component 10, valve seat 11, valve port channel portion 111, first valve cavity portion 112, second valve cavity portion 113, upper cavity wall 1131, circumferential cavity wall 1132, position limiting cavity wall 1133, small diameter cavity portion 1134, large diameter cavity portion 1135, guide seat 12;

[0036] Silencing component 20, upper end surface 201, lower end surface 202, porous member 21, first porous member 211, first through hole 2111, second porous member 212, second through hole 2121, third porous member 213, third through hole 2131, notch 2101, annular pad 22;

[0037] First connecting pipe 31, upper pipe end wall 3101, first pipe cavity 3102, second pipe cavity 3103, large diameter pipe portion 311, first guide wall 3111, second guide wall 3112, recessed portion 3113, transition pipe portion 312, small diameter pipe portion 313, first pipe section 314, second pipe section 315;

[0038] The second takes over 32;

[0039] Valve needle component 40, valve needle 41, sleeve portion 42, elastic member 43, support component 44, fixing member 45, sleeve cover 46;

[0040] Screw 50;

[0041] Nut 60, connecting piece 61;

[0042] Rotor component 70, magnetic rotor 71, connecting plate 72;

[0043] Cover 81, valve housing 82;

[0044] The first chamber is 1P, and the second chamber is 2P. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0046] The terms "first", "second", and "third" as used herein are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0047] The directional words "upper", "lower" etc. involved in this article are defined based on the positions of components in the accompanying drawings or the relative positions of components. "Axial" refers to the axial direction of the valve seat component of the valve device or the axial direction of the screw rod. In the drawings, the axial direction is the up and down direction, and the "radial" refers to the direction perpendicular to the "axial direction". The use of directional words is only for the convenience of understanding and description and does not constitute a limitation on the scope of protection.

[0048] Please refer to FIG. 1 , which is a cross-sectional schematic diagram of a valve device in an embodiment provided in the present application.

[0049] In this embodiment, the valve device can be an electronic expansion valve or an electric valve, and the valve device can be applied to a refrigeration system. The valve device includes a valve body component 10, a first connecting pipe 31, a second connecting pipe 32, a valve needle component 40, a screw rod 50, a nut 60, a rotor component 70, and a valve housing 82.

[0050] The valve body component 10 has a valve port channel portion 111, and the valve body component 10 is fixedly connected with a first connecting pipe 31 and a second connecting pipe 32, and the first connecting pipe 31 and the second connecting pipe 32 are connected through the valve port channel portion 111. The first connecting pipe 31 and the second connecting pipe 32 can be fixedly connected to the valve body component 10 by interference fit, welding, or a combination of interference fit and welding.

[0051] In application, the valve device can be a two-way flow valve, that is, the refrigerant can flow into the valve body component 10 from the first connecting pipe 31, and flow out from the second connecting pipe 32 through the valve port channel portion 111. The refrigerant can also flow into the valve body component 10 from the second connecting pipe 32, and flow out from the first connecting pipe 31 through the valve port channel portion 111. Of course, the valve device can be used only as a one-way flow valve.

[0052] In the illustrated example, the circumference of the valve body component 10 is connected to the second connecting pipe 32 , and the bottom of the valve body component 10 is connected to the first connecting pipe 31 .

[0053] The valve housing 82 is fixedly connected to the upper end of the valve body component 10, and the valve housing 82 and the valve body component 10 can form a space for installing other structures of the valve device (such as the aforementioned valve needle component 40, screw rod 50, nut 60 and rotor component 70, etc.). In some embodiments, the valve housing 82 can be directly fixedly connected to the upper end of the valve body component 10; in other embodiments, the valve housing 82 can be fixedly connected to the valve body component 10 through a transition structure. As shown in FIG. 1, the valve device further includes a cover 81, which is fixedly connected to the upper end of the valve body component 10, and the valve housing 82 is fixedly connected to the cover 81.

[0054] The rotor component 70 is located in the valve housing 82 . The rotor component 70 includes a magnetic rotor 71 and a connecting plate 72 . The connecting plate 72 is fixedly connected to the magnetic rotor 71 . The magnetic rotor 71 can rotate by inducing the electromagnetic force of an electromagnetic coil (not shown in the figure).

[0055] The screw rod 50 is fixedly connected to the rotor component 70 , and specifically, the screw rod 50 can be fixedly connected to the connecting plate 72 , so that the screw rod 50 can rotate along with the rotation of the rotor component 70 .

[0056] The screw rod 50 is inserted into the nut 60 and threadedly connected with the nut 60, and the lower end of the screw rod 50 is connected with the valve needle component 40. The nut 60 is limited in the circumferential direction, so that when the screw rod 50 rotates, it can drive the valve needle component 40 to approach or move away from the valve port channel portion 111 in the axial direction under the action of the threaded connection with the nut 60, so as to close or open the valve port channel portion 111.

[0057] In the example shown in FIG. 1 , the nut 60 can be fixedly connected to the cover 81 via the connecting piece 61 , so that the nut 60 and the valve body component 10 are relatively fixed and cannot rotate in a circumferential direction.

[0058] The valve needle component 40 includes a valve needle 41 , a sleeve portion 42 , an elastic member 43 , a supporting member 44 , a fixing member 45 and a sleeve cover 46 .

[0059] The valve needle 41 and the screw rod 50 can be connected in a floating manner through the cooperation of the sleeve portion 42, the elastic member 43, the support member 44, the fixing member 45 and the sleeve cover 46. For example, the valve needle 41 passes through the sleeve portion 42 and is suspended at the lower end of the sleeve portion 42; the sleeve cover 46 is fixed to the upper end of the sleeve portion 42; the lower end of the screw rod 50 passes through the sleeve cover 46 and is connected to the fixing member 45, and the fixing member 45 can abut against the sleeve cover 46; the support member 44 is installed at the bottom end of the sleeve portion 42 and can cooperate with the upper end of the valve needle 41, and the elastic member 43 is arranged between the support member 44 and the fixing member 45.

[0060] When the screw rod 50 drives the valve needle component 40 to move downward to close the valve port channel portion 111, the sealing portion at the lower end of the valve needle 41 can be sealingly abutted against the valve port channel portion 111. At this time, if the rotor component 70 continues to rotate and the screw rod 50 continues to move downward, the valve needle 41 will not move axially due to the abutment of the valve port channel portion 111. The screw rod 50 will move downward relative to the valve needle 41, and the elastic component 43 will be squeezed through the fixing component 45, so that the elastic component 43 applies elastic force to the valve needle 41 to ensure the reliability of valve closing.

[0061] When opening the valve, the screw rod 50 first moves up until the fixing member 45 abuts against the sleeve cover 46, and then drives the valve needle 41 to move up to open the valve port channel portion 111, thereby improving the valve opening performance.

[0062] In a specific implementation, the valve body component 10 may include a valve seat 11 and a guide seat 12, the valve port channel portion 111 may be provided on the valve seat 11, and the guide seat 12 may be fixed to the inner cavity of the valve seat 11. The guide seat 12 may guide the valve needle 41 to ensure the accuracy of the axial movement of the valve needle 41. The guide seat 12 may also guide the sleeve portion 42 to ensure the accuracy of the axial movement of the sleeve portion 42.

[0063] FIG1 is only an exemplary embodiment of a specific structure of a valve device. In other embodiments, the specific structures of the valve needle component 40, the screw rod 50, the nut 60 and the rotor component 70, or the way they cooperate with each other can be changed as needed, or existing designs can be adopted.

[0064] In application scenarios such as home environments, in order to reduce the large noise generated when the refrigerant passes through the valve port channel portion 111 (throttling part) and affects the comfort of the human ear, the valve device provided in the embodiment of the present application is also provided with a silencer component. The present application focuses on improving the structure and setting method of the silencer component.

[0065] Please refer to Figures 2 to 5 together, Figure 2 is a partial enlarged view of part A in Figure 1; Figure 3 is a partial enlarged view of part B in Figure 2; Figure 4 is a partial cross-sectional schematic diagram of the valve seat in Figure 1; Figure 5 is a cross-sectional schematic diagram of the silencer component and the first connecting pipe in Figure 1 after assembly.

[0066] In this embodiment, the valve body component 10 of the valve device also has a first valve cavity portion 112 and a second valve cavity portion 113. The first valve cavity portion 112 is connected to the second valve cavity portion 113 through the valve port channel portion 111. The first valve cavity portion 112 is located above the valve port channel portion 111, and the second valve cavity portion 113 is located below the valve port channel portion 111.

[0067] The first connecting pipe 31 is communicated with the second valve cavity 113 , and the second connecting pipe 32 is communicated with the first valve cavity 112 .

[0068] In the illustrated example, the first valve cavity 112 and the second valve cavity 113 are also provided on the valve seat 11, and the valve seat 11 is an integrated structural member. In other embodiments, the valve seat 11 can also be provided as a split structure, which is then assembled and fixed together, and the formation of the valve port channel portion 111, the first valve cavity 112, and the second valve cavity 113 can be adaptively adjusted according to the specific structure of the valve seat 11.

[0069] The valve device includes a silencer component 20, at least part of which is located in the second valve cavity portion 113, and a first chamber 1P is defined between an upper end surface 201 of the silencer component 20 and an upper cavity wall 1131 of the second valve cavity portion 113; the silencer component 20 includes more than two porous components 21, each porous component 21 is arranged at intervals along the axial direction of the valve body component 10, and the porous components 21 have an axial channel therethrough, and the axial channels of two adjacent porous components 21 are staggered in the axial direction.

[0070] Here, the porous member 21 refers to a component having a plurality of micropore structures inside, the aperture of the micropores of which is smaller than the inner diameter D1 of the valve port channel portion 111 . The aperture value of the micropores can be determined according to actual needs and is not limited to a specific value here.

[0071] After adopting the above scheme, when the valve device is used, during the process of the refrigerant flowing from the first connecting pipe 31 to the second connecting pipe 32, or from the second connecting pipe 32 to the first connecting pipe 31, most of the refrigerant will pass through the porous part 21 of the silencing component 20, and the bubbles in the refrigerant will be broken up layer by layer by the porous parts 21, so that the gas phase and liquid phase in the refrigerant are distributed more evenly, improving the fluid state of the refrigerant after throttling or when flowing through the throttling part, making the sound of the refrigerant flow more gentle and the loudness relatively reduced, so as to have a better noise reduction effect, thereby improving the comfort of the human ear in the application environment of the valve device.

[0072] At the same time, because the porous member 21 has a penetrating axial channel and the axial channels of adjacent porous members 21 are staggered in the axial direction, when the valve device is used for a long time and causes the porous member 21 to be blocked, the refrigerant can flow through the staggered axial channels and can pass through other porous members 21 during the flow to achieve noise reduction, thereby avoiding the situation where the valve device cannot work normally due to the blockage of the silencer component 20.

[0073] Since two adjacent porous members 21 of the muffler component 20 are arranged at intervals in the axial direction, a second chamber 2P is formed between the two adjacent porous members 21 .

[0074] The following description takes the example that the muffler component 20 shown in the figure is provided with three porous components 21. In other embodiments, the number of the porous components 21 in the muffler component 20 can be set according to application requirements and is not limited to that shown in the figure.

[0075] For the convenience of description, the three porous members 21 of the sound-absorbing component 20 are referred to as a first porous member 211 , a second porous member 212 , and a third porous member 213 from top to bottom.

[0076] Based on the three porous parts 21 provided in the silencer component 20, the valve device has a first chamber 1P and two second chambers 2P, one of the second chambers 2P is located between the first porous part 211 and the second porous part 212, and the other second chamber 2P is located between the second porous part 212 and the third porous part 213.

[0077] When the refrigerant of the valve device flows from the second connecting pipe 32 to the first connecting pipe 31, the flow path of the refrigerant is as follows: the second connecting pipe 32 → the first valve cavity 112 → the valve port channel 111 → the first chamber 1P → the first porous member 211 → the second chamber 2P between the first porous member 211 and the second porous member 212 → the second chamber 2P between the second porous member 212 and the third porous member 213 → the first connecting pipe 31. After being throttled by the valve port channel 111, the refrigerant first flows into the first chamber 1P, where it can be buffered, reducing the flow rate of the refrigerant flowing through it, so that the refrigerant is more easily broken up when it subsequently flows through the first porous member 211, which is beneficial to reducing noise. The function of the second chamber 2P is similar to that of the first chamber 1P, and will not be repeated.

[0078] When the refrigerant of the valve device flows from the first connecting pipe 31 to the second connecting pipe 32, the flow path of the refrigerant is as follows: the first connecting pipe 31 → the third porous member 213 → the second chamber 2P between the third porous member 213 and the second porous member 212 → the second porous member 212 → the second chamber 2P between the second porous member 212 and the first porous member 211 → the first porous member 211 → the first chamber 1P → the valve port channel 111 → the first valve chamber 112 → the second connecting pipe 32. After the refrigerant flows in from the first connecting pipe 31, it first flows through the third porous member 213. After the bubbles in the refrigerant are refined and broken by the third porous member 213, they flow into the second chamber 2P to be buffered, so that the dispersed bubbles can be more uniform, which is conducive to improving the noise reduction effect and avoiding throttling. In the subsequent flow of the refrigerant, the bubbles are further dispersed by the second porous member 212 and the first porous member 211, and the chamber buffers, which can effectively reduce the noise.

[0079] In this embodiment, the first connecting pipe 31 includes a large diameter pipe portion 311, at least a portion of which is fixedly inserted into the second valve cavity portion 113, and the silencer component 20 is disposed in the cavity of the large diameter pipe portion 311, as shown in Figures 2 and 5.

[0080] After the above arrangement, the first connecting pipe 31 serves as the installation base of the silencer component 20, which can avoid the need to additionally set up the installation structure of the silencer component 20. At the same time, during the assembly process of the valve device, the silencer component 20 can be first installed as a whole in the first connecting pipe 31, and then the first connecting pipe 31 with the silencer component 20 can be assembled with the valve body component 10. The assembly complexity is reduced, which is beneficial to improving the assembly efficiency and also beneficial to saving costs.

[0081] In a specific implementation, after the large diameter tube portion 311 of the first connecting tube 31 is inserted into the second valve cavity 113, the upper tube end wall 3101 of the first connecting tube 31 facing the second valve cavity 113 abuts against the upper cavity wall 1131 of the second valve cavity 113. In this way, the position of the first connecting tube 31 can be limited by the upper cavity wall 1131 of the second valve cavity 113, without the need to separately set a structure for limiting the position of the first connecting tube 31.

[0082] After the upper tube end wall 3101 of the first connecting pipe 31 abuts against the upper cavity wall 1131 of the second valve cavity portion 113, the aforementioned first chamber 1P is formed by the upper cavity wall 1131 of the second valve cavity portion 113, part of the inner circumferential wall of the large diameter tube portion 311 and the upper end surface 201 of the silencer component 20, and the first chamber 1P is roughly an equal-diameter chamber, and the inner diameter of the first chamber 1P is the inner diameter D2 of the large diameter tube portion 311.

[0083] In a specific implementation, the relationship between the inner diameter D2 of the large diameter tube portion 311 (ie, the inner diameter of the first chamber 1P) and the inner diameter D1 of the valve port channel portion 111 is: D2≥2D1. In this way, the refrigerant can be better buffered in the first chamber 1P, and the noise reduction effect can be better achieved.

[0084] In this embodiment, the silencer component 20 includes an annular gasket 22 . The annular gasket 22 is disposed between two adjacent porous members 21 . The annular gasket 22 is used to define the relative positions of the two adjacent porous members 21 in the axial direction.

[0085] In a specific implementation, the annular gasket 22 is interference fit with the large diameter tube portion 311 .

[0086] After the above arrangement, the second chamber 2P is formed by the inner peripheral wall of the annular gasket 22 and the opposite end surfaces of two adjacent porous members 21 .

[0087] In actual setting, on the basis of satisfying the supporting function and limiting function of the porous member 21, the aperture of the middle through hole of the annular pad 22 should be set as large as possible so that the second chamber 2P has a larger inner diameter and the refrigerant flowing through can be better buffered.

[0088] A stopper (not shown) is disposed in the lumen of the first connecting pipe 31 , and the lower end surface 202 of the silencer component 20 abuts against the stopper to limit the position of the silencer component 20 in the first connecting pipe 31 .

[0089] In the illustrated example, the upper end surface 201 of the silencer component 20 is the top end surface of the first porous member 211 , and the lower end surface 202 of the silencer component 20 is the bottom end surface of the third porous member 213 .

[0090] Exemplarily, the stop portion may be a protrusion extending radially inward from the inner peripheral wall of the first connecting pipe 31 , and the protrusion may be a circumferentially continuous structure or a circumferentially discontinuous structure.

[0091] Exemplarily, the stop portion may also be a structure such as a washer that is interference fit with the first connecting pipe 31 .

[0092] In this embodiment, the first connecting pipe 31 further includes a transition pipe portion 312 and a small diameter pipe portion 313. The small diameter pipe portion 313 is connected to the large diameter pipe portion 311 through the transition pipe portion 312. The inner diameter of the transition pipe portion 312 gradually decreases from the large diameter pipe portion 311 to the small diameter pipe portion 313. The inner diameter of the small diameter pipe portion 313 is smaller than the inner diameter of the large diameter pipe portion 311.

[0093] After the above arrangement, when the refrigerant flows from the first connecting pipe 31 to the second connecting pipe 32, the refrigerant first flows from the small diameter tube portion 313 into the transition tube portion 312. After passing through the expansion cavity of the transition tube portion 312, the pressure of the refrigerant is reduced and the flow rate is slowed down, which is beneficial to reducing noise and is also beneficial for the bubbles in the refrigerant to be more easily broken up and refined when it subsequently flows through the third porous member 213.

[0094] On the basis of providing the transition pipe portion 312 , the protrusion as the stop portion may be provided at the transition pipe portion 312 or at the end of the large diameter pipe portion 311 adjacent to the transition pipe portion 312 .

[0095] In this embodiment, the large diameter tube portion 311 of the first connecting pipe 31 is interference fit with the second valve cavity portion 113 of the valve body component 10, and the large diameter tube portion 311 is also welded and fixed to the valve body component 10. The large diameter tube portion 311 and the second valve cavity portion 113 are interference fit, which can limit the relative position of the large diameter tube portion 311 and the valve body component 10, thereby limiting the position of the silencer component 20 installed in the large diameter tube portion 311. The large diameter tube portion 311 is further welded to the valve body component 10, which can further enhance the fixing effect and prevent the silencer component 20 from shifting after long-term use.

[0096] In a specific implementation, the outer tube wall of the large diameter tube portion 311 has a recessed portion 3113 that is recessed radially inward. The provision of the recessed portion 3113 can facilitate the press-fitting and tight-fitting operation between the large diameter tube portion 311 and the second valve cavity portion 113 .

[0097] The large diameter tube portion 311 further includes a first guide wall 3111 and a second guide wall 3112, which are respectively arranged on both sides of the recessed portion 3113, and both the first guide wall 3111 and the second guide wall 3112 are interference fit with the circumferential cavity wall 1132 of the second valve cavity portion 113. In conjunction with FIG. 3 and FIG. 5, the first guide wall 3111 is located above the recessed portion 3113, and the second guide wall 3112 is located below the recessed portion 3113. With this arrangement, the large diameter tube portion 311 is not easily deflected when being press-fitted with the second valve cavity portion 113.

[0098] In a specific implementation, the axial height of the first chamber 1P is L1, L1 ≥ 0.3 mm, so that the refrigerant can be fully buffered between the valve port channel portion 111 and the first porous member 211, so as to improve the noise reduction effect. For example, L1 can be 0.4 mm, 0.45 mm, 0.5 mm, 1 mm, etc.

[0099] The axial height of the second chamber 2P is L2, 0.3mm≤L2≤5mm, so that the refrigerant can be fully buffered between two adjacent porous members 21, and the bubbles dispersed by the porous members 21 can be more uniform, so as to improve the noise reduction effect. Exemplary L2 can be 0.7mm, 0.9mm, 1mm, 3mm, 3.5mm, 4mm, 4.5mm, etc.

[0100] In practical applications, the specific values ​​of L1 and L2 can be determined based on experiments or simulations.

[0101] As shown in FIG2 , in this embodiment, the axial passages of the three porous members 21 of the muffler component 20 all include through holes away from the outer peripheral wall of the porous member 21, that is, the axial passages are circumferentially closed. The first porous member 211 has a first through hole 2111, the second porous member 212 has a second through hole 2121, and the third porous member 213 has a third through hole 2131. The first through hole 2111 and the second through hole 2121 are staggered in the axial direction, and the second through hole 2121 and the third through hole 2131 are staggered in the axial direction.

[0102] After the above arrangement, taking the flow of refrigerant from the second connecting pipe 32 to the first connecting pipe 31 as an example, when the refrigerant flows out from the first through hole 2111 through the first chamber 1P, it faces the microporous structure of the second porous member 212, which can ensure that most of the refrigerant continues to flow after being broken up by the microporous structure of the second porous member 212; when the refrigerant flows out through the second through hole 2121, it faces the microporous structure of the third porous member 213, which can ensure that most of the refrigerant continues to flow after being broken up by the microporous structure of the third porous member 213, thereby helping to enhance the noise reduction effect.

[0103] In a specific implementation, the aperture of the through hole of the porous member 21 is set to D3, which is larger than the inner diameter D1 of the valve port channel portion 111; in the figure, the second through hole 2121 of the second porous member 212 is marked as D3 as an example. It can be understood that the apertures of the first through hole 2111 and the third through hole 2131 are both larger than D1. With this arrangement, the opening adjustment of the valve port channel portion 111 has nothing to do with the silencer component 20. When the porous member 21 is blocked and the refrigerant can only flow through the through hole of the porous member 21, the opening adjustment of the valve port channel portion 111 can be avoided from being inconsistent with the design and affecting the working performance of the valve device.

[0104] The axial channel of the porous member 21 may have other structural forms besides the above-mentioned through-hole structure. Please refer to FIG. 6 , which is a schematic diagram of the structure of the porous member and the first connecting pipe in a modified embodiment.

[0105] As shown in FIG6 , the axial passage of the porous member 21 may also include a plurality of notches 2101 located on the outer peripheral wall of the porous member 21, and the notches 2101 are groove-shaped structures. After the porous member 21 is installed on the large-diameter tube portion 311 of the first connecting pipe 31, the notches 2101 of the porous member 21 and part of the inner wall of the large-diameter tube portion 311 are enclosed to form a through hole. The notches 2101 of two adjacent porous members 21 are also staggered in the axial direction.

[0106] The effective flow area of ​​all the gaps 2101 of a porous member 21 is set to be greater than 1.1 times the flow area of ​​the valve port channel portion 111. In this way, when the porous member 21 is blocked and the refrigerant can only flow through the gaps 2101, the normal working performance of the valve device can be avoided from being affected.

[0107] In addition to the embodiments shown in Figures 1 to 5, the silencing component 20 may be assembled in other relatively simple ways. Please refer to Figures 7 to 10, Figure 7 is a partial cross-sectional schematic diagram of a valve device in another embodiment provided by the present application, Figure 8 is a partial enlarged view of the C portion in Figure 7, Figure 9 is a partial cross-sectional schematic diagram of the valve seat in Figure 7, and Figure 10 is a partial cross-sectional schematic diagram of the first connecting pipe in Figure 7.

[0108] In this embodiment, the basic structure of the valve device is similar to that of the embodiment shown in Figures 1 to 5, and only the difference between the two is described below. In order to clearly show the difference and connection between this embodiment and the previous embodiment, the same functional components or structures are indicated in the figures with the same marks.

[0109] In this embodiment, the upper end of the first connecting pipe 31 is fixedly inserted into the second valve cavity 113, and the second valve cavity 113 has a limiting cavity wall 1133 facing the first connecting pipe 31, and the limiting cavity wall 1133 is away from the valve port channel 111 relative to the upper cavity wall 1131 of the second valve cavity 113. The upper end surface 201 of the muffler component 20 abuts against the limiting cavity wall 1133, and the lower end surface 202 of the muffler component 20 abuts against the upper tube end wall 3101 of the first connecting pipe 31. In this way, the muffler component 20 is limited between the limiting cavity wall 1133 and the first connecting pipe 31.

[0110] The second valve chamber 113 is a stepped chamber structure, including a small diameter chamber 1134 and a large diameter chamber 1135 . The small diameter chamber 1134 is located above the large diameter chamber 1135 . At this time, the upper chamber wall 1131 of the second valve chamber 113 is also the upper chamber wall of the small diameter chamber 1134 .

[0111] The upper tube end wall 3101 of the first connecting pipe 31 serves as a limiting structure for the lower end surface 202 of the muffler component 20, thereby avoiding the need for an additional limiting structure. At the same time, the length of the plug-in fitting section between the first connecting pipe 31 and the second valve cavity 113 can be set to be relatively small, so that the first connecting pipe 31 is easy to be pressed and tightly fitted with the second valve cavity 113.

[0112] In the silencer component 20 , the positions of two adjacent porous members 21 can still be limited by the annular gasket 22 . At this time, the annular gasket 22 and the second valve cavity portion 113 are interference fit.

[0113] In this embodiment, the first chamber 1P is formed by the upper chamber wall 1131 of the second valve chamber 113, the chamber peripheral wall of the small-diameter chamber 1134, and a portion of the upper end surface 201 of the muffler 20. The inner diameter D4 of the first chamber 1P is the inner diameter of the small-diameter chamber 1134, D4≥1.1D1, and D1 is still the inner diameter of the valve port channel 111. In this way, it can be ensured that the refrigerant is fully buffered after flowing into the first chamber 1P, which is conducive to reducing noise.

[0114] The size settings of the axial height L1 of the first chamber 1P and the axial height L2 of the second chamber 2P may refer to the aforementioned embodiment and will not be repeated here.

[0115] In this embodiment, the first connecting pipe 31 includes a first pipe section 314 and a second pipe section 315. The outer diameters of the first pipe section 314 and the second pipe section 315 are the same. The first pipe section 314 has a first lumen 3102, and the second pipe section 315 has a second lumen 3103. The first lumen 3102 is arranged relative to the second lumen 3103 and close to the second valve chamber portion 113, and the inner diameter of the first lumen 3102 is larger than the inner diameter of the second lumen 3103.

[0116] After the above arrangement, when the refrigerant flows from the first connecting pipe 31 to the second connecting pipe 32, it flows from the second tube cavity 3103 into the first tube cavity 3102, which is equivalent to flowing into an expansion cavity. The refrigerant pressure is reduced and the flow rate is slowed down, which is beneficial to reduce noise.

[0117] In a specific implementation, the connection between the first lumen 3102 and the second lumen 3103 can be smoothly transitioned to help reduce flow resistance.

[0118] In this embodiment, the axial channel of the porous member 21 may also be configured with reference to the aforementioned embodiment, which will not be repeated here.

[0119] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A valve device, characterized in that It includes a valve body component, a muffler component and a first connecting pipe; The valve body component comprises a valve port channel portion, a first valve cavity portion and a second valve cavity portion, the first valve cavity portion is connected with the second valve cavity portion through the valve port channel portion, the first valve cavity portion is located above the valve port channel portion, and the second valve cavity portion is located below the valve port channel portion; The first connecting pipe is in communication with the second valve cavity; At least part of the silencer component is located in the second valve cavity portion, and a first cavity is defined between the upper end surface of the silencer component and the upper cavity wall of the second valve cavity portion; the silencer component comprises more than two porous components, each of which is arranged at intervals along the axial direction of the valve body component, and each of the porous components has an axial passage extending therethrough, and the axial passages of two adjacent porous components are staggered in the axial direction.

2. The valve device according to claim 1, characterized in that The axial passage comprises a through hole away from the outer peripheral wall of the porous member, and the aperture of the through hole is larger than the inner diameter of the valve port passage portion.

3. The valve device according to claim 1, characterized in that The axial channel includes a plurality of notches located on the outer peripheral wall of the porous member, and the effective flow area of ​​each of the notches of the porous member is greater than 1.1 times the flow area of ​​the valve port channel portion.

4. The valve device according to claim 1, characterized in that The axial height of the first chamber is L1, and a second chamber is provided between two adjacent porous members. The axial height of the second chamber is L2, wherein L1≥0.3 mm, and 0.3 mm≤L2≤5 mm.

5. The valve device according to any one of claims 1 to 4, characterized in that: The first connecting pipe includes a large-diameter pipe portion, at least a portion of which is fixedly inserted into the second valve cavity portion, and the muffler component is arranged in the cavity of the large-diameter pipe portion.

6. The valve device according to claim 5, characterized in that The outer tube wall of the large diameter tube portion has a recessed portion that is radially recessed inward, and the large diameter tube portion includes the first guide wall and the second guide wall, the first guide wall and the second guide wall are respectively located on both sides of the recessed portion, the first guide wall and the second guide wall are both interference fit with the circumferential cavity wall of the second valve cavity portion, and the large diameter tube portion is welded and fixed to the valve body component.

7. The valve device according to claim 5, characterized in that The muffler component comprises an annular pad, which is arranged between two adjacent porous members, and is used to define the relative position of the two adjacent porous members in the axial direction, and the annular pad is interference-fitted with the large-diameter pipe portion; A stopper is provided in the lumen of the first connecting pipe, and the lower end surface of the silencer component abuts against the stopper.

8. The valve device according to claim 7, characterized in that The first connecting pipe also includes a transition pipe portion and a small diameter pipe portion, the small diameter pipe portion is connected to the large diameter pipe portion through the transition pipe portion, the inner diameter of the transition pipe portion gradually decreases from the large diameter pipe portion to the small diameter pipe portion, and the stop portion is arranged at the transition pipe portion or the end of the large diameter pipe portion adjacent to the transition pipe portion.

9. The valve device according to claim 8, characterized in that The inner diameter of the valve port channel portion is D1, the inner diameter of the large diameter tube portion is D2, and D2≥2D1.

10. The valve device according to any one of claims 1 to 4, characterized in that: The upper end portion of the first connecting pipe is fixedly inserted in the second valve cavity portion, and the second valve cavity portion has a limiting cavity wall facing the first connecting pipe, and the limiting cavity wall is away from the valve port channel portion relative to the upper cavity wall; the upper end surface of the silencer component abuts against the limiting cavity wall, and the lower end surface of the silencer component abuts against the upper tube end wall of the first connecting pipe.

11. The valve device according to claim 10, characterized in that The first connecting pipe includes a first lumen and a second lumen, the first lumen is arranged relative to the second lumen and close to the second valve cavity, and the inner diameter of the first lumen is greater than the inner diameter of the second lumen.

12. The valve device according to claim 10, characterized in that The silencer component comprises an annular gasket, which is arranged between two adjacent porous members and used to define the relative positions of the two adjacent porous members in the axial direction. The annular gasket is interference fit with the second valve cavity.

13. The valve device according to claim 10, characterized in that The inner diameter of the first chamber is D4, the inner diameter of the valve port channel is D1, and D4≥1.1D1.

14. The valve device according to any one of claims 1 to 4, characterized in that: The valve device is used in a refrigeration system.

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