A valve device and expansion valve

Abstract

The utility model provides a kind of valve device and expansion valve, belong to thermal management technical field, including valve assembly and silencing subassembly, silencing subassembly is limit connection with valve assembly, valve assembly has first inlet, valve port flow channel and first passage, silencing subassembly includes rectifier, rectifier has rectification cavity, silencing hole and bypass hole, first inlet is communicated with first passage, rectification cavity, silencing hole, bypass hole by valve port flow channel, the flow cross-sectional area of single bypass hole is greater than the flow cross-sectional area of single silencing hole. By setting bypass hole on rectifier, and the flow cross-sectional area of single bypass hole is greater than the flow cross-sectional area of single silencing hole, so that impurities in fluid can flow out silencing subassembly through bypass hole, reduce the blockage of silencing subassembly by impurities.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology, specifically to a valve device and an expansion valve. Background Technology

[0002] When the expansion valve is in use, since the refrigerant is often in a two-phase state of gas-liquid mixture, a lot of noise will occur when there are large bubbles in the refrigerant. A silencing component is installed to eliminate the noise. However, after working for a long time, impurities in the refrigerant will clog the silencing component, reducing the silencing effect. Utility Model Content

[0003] The purpose of this invention is to provide a valve device and an expansion valve, which aims to improve the problem of reduced noise reduction effect caused by impurities in the refrigerant clogging the noise reduction components.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] On one hand, the present invention provides a valve device, including a valve assembly and a silencing assembly. The silencing assembly is limitedly connected to the valve assembly. The valve assembly has a first inlet, a valve port flow channel, and a first channel. The silencing assembly includes a rectifier, which has a rectifier cavity, a silencing hole, and a bypass hole. The first inlet is connected to the first channel, the rectifier cavity, the silencing hole, and the bypass hole through the valve port flow channel. The flow cross-sectional area of ​​a single bypass hole is larger than the flow cross-sectional area of ​​a single silencing hole.

[0006] According to the valve device provided by this utility model, the fluid flows in the first inlet, valve port flow channel, and first channel and enters the rectifier cavity of the rectifier in the silencing assembly. The fluid flowing through the silencing holes in the rectifier can effectively eliminate air bubbles in the refrigerant, thereby helping to reduce the noise generated by the air bubbles. Furthermore, the flow cross-sectional area of ​​a single bypass hole is larger than that of a single silencing hole, and impurities in the fluid will be discharged from the rectifier through the bypass hole, which helps to reduce the situation of impurities clogging the silencing assembly and improves the silencing effect.

[0007] On the other hand, the present invention also provides an expansion valve, including the above-mentioned valve device. The expansion valve further includes a valve body, the valve body having a first flow channel, a second flow channel, and a mounting cavity. The valve assembly is located in the mounting cavity, and the valve assembly is sealed to the valve body. The first flow channel can communicate with the silencing hole and the bypass hole through the valve port flow channel. The silencing hole and the bypass hole communicate with the mounting cavity. The first flow channel and the second flow channel communicate through the mounting cavity, and along the radial direction of the mounting cavity, there is a gap between the rectifier and the inner wall of the valve body.

[0008] According to the expansion valve provided by this utility model, the fluid flows in through the first flow channel of the valve body and enters the silencing component in the valve device for silencing. The fluid flowing through the silencing hole in the silencing component can effectively eliminate air bubbles in the refrigerant, thereby reducing the noise generated by the air bubbles. There is a gap between the rectifier and the inner wall of the valve body, which is conducive to the discharge of impurities in the fluid from the bypass hole to the rectifier, which helps to reduce the situation of impurities clogging the silencing component and improves the silencing effect. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of an expansion valve provided in one embodiment of the present invention;

[0010] Figure 2 This is another three-dimensional structural schematic diagram of the expansion valve provided in one embodiment of the present invention;

[0011] Figure 3 This is another three-dimensional structural schematic diagram of the expansion valve provided in one embodiment of the present invention;

[0012] Figure 4 yes Figure 3 The diagram shows a cross-sectional view of an expansion valve along the AA direction.

[0013] Figure 5 yes Figure 3 The diagram shows a three-dimensional structural diagram of a valve assembly in a valve device.

[0014] Figure 6 yes Figure 3 The diagram shows a three-dimensional structure of the valve body in an expansion valve.

[0015] Figure 7 yes Figure 5 The diagram shows a cross-sectional view of a valve assembly along the AA direction in a valve device.

[0016] Figure 8 yes Figure 7 An enlarged schematic diagram of the valve assembly at position B according to one embodiment;

[0017] Figure 9 yes Figure 7 An enlarged schematic diagram of the bearing housing structure at position B according to one embodiment;

[0018] Figure 10 yes Figure 5 A schematic diagram of the exploded structure of a sound-absorbing component provided in one embodiment;

[0019] Figure 11 yes Figure 5 A schematic diagram of a cross-sectional structure of a noise reduction component in the AA direction is provided in one embodiment;

[0020] Figure 12 yes Figure 5 A schematic diagram of the AA-direction cross-sectional structure of another noise reduction component provided in one embodiment;

[0021] Figure 13 yes Figure 7 An enlarged schematic diagram of another bearing housing structure at position B provided in one embodiment. 100, Valve body; 101, Top surface; 102, Bottom surface; 103, First side surface; 104, Second side surface; 105, Fluid inlet; 106, Fluid outlet; 107, First flow channel; 108, Second flow channel; 110, Mounting cavity; 111, First expansion section; 112, Limiting section; 113, Second expansion section; 120, Sump; 200, Silencing assembly; 210, Rectifier; 211, Bypass hole; 212, Silencing hole; 213, Rectifier cavity; 214, Side wall portion; 215, Bottom wall portion; 220, Connection. Components; 221, First limiting groove; 300, Valve assembly; 310, Bearing seat; 311, Valve port flow channel; 312, First inlet; 313, First connecting part; 314, Second connecting part; 315, Valve port; 316, First channel; 317, First flow chamber; 318, Second flow chamber; 319, Second limiting groove; 320, Valve needle; 330, Gasket; 340, Sleeve; 350, Coil component; 360, Magnetic rotor; 370, Lead screw; D1, First direction; D2, Second direction; D3, Third direction. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments are further described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0023] The expansion valve is an important control component of the refrigeration system. It uses the energization and de-energization of the coil assembly as the power source for the electronic expansion valve. The valve core is controlled to move axially through the transmission rod, thereby adjusting the valve opening and changing the refrigerant flow rate.

[0024] like Figures 1 to 3 As shown, the expansion valve in this embodiment can be an expansion valve, and includes a valve body 100 and a valve assembly 300. The valve assembly 300 is connected to the valve body 100. It should be noted that the valve body 100 can be an independent component that can cooperate with the expansion valve, or it can exist in the form of a flow channel plate in the field of thermal management. The flow channel plate has a fluid channel, and the fluid assembly can be sealed and installed with the flow channel plate. The flow channel in the fluid assembly can communicate with the fluid channel. The fluid assembly can be a solenoid valve assembly, a heat exchanger, or other components. This application does not particularly limit the shape of the valve body 100. For example, the valve body 100 can be a cube, a cylinder, or the like.

[0025] The valve body 100 has a length direction, a width direction, and a height direction. For ease of explanation, the length direction of the valve body 100 is defined as the first direction D1, the width direction of the valve body 100 is defined as the second direction D2, and the height direction of the valve body 100 is defined as the third direction D3, wherein the first direction D1, the second direction D2, and the third direction D3 are all perpendicular to each other.

[0026] The valve body 100 has a top surface 101, a bottom surface 102, a first side surface 103, and a second side surface 104. The top surface 101 and the bottom surface 102 are arranged opposite each other along a third direction D3, and the first side surface 103 and the second side surface 104 are arranged opposite each other along a first direction D1.

[0027] like Figures 1 to 6 As shown, the valve body 100 has a fluid inlet 105 and a fluid outlet 106. Specifically, the fluid inlet 105 is located on the first side 103 of the valve body 100, and the fluid outlet 106 is located on the second side 104 of the valve body 100. The valve body 100 also has a first flow channel 107 and a second flow channel 108. The fluid inlet 105 is the port of the first flow channel 107, and the fluid outlet 106 is the port of the second flow channel 108. The valve body 100 also has a mounting cavity 110, wherein the mounting cavity 110 can be recessed from the top surface 101 along the third direction D3 to the bottom surface 102. Along the third direction D3, the first flow channel 107 and the second flow channel 108 are located at different positions. In the valve body 100, the first flow channel 107 is connected to the second flow channel 108 through the mounting cavity 110. Optionally, the fluid inlet 105 and the fluid outlet 106 can be respectively located on the other two sides of the valve body 100; it is understood that the fluid inlet 105 and the fluid outlet 106 are not necessarily located on two opposite sides of the valve body 100, and the fluid inlet 105 and the fluid outlet 106 can also be located on mutually perpendicular sides of the valve body 100 by changing the flow channel direction.

[0028] The valve assembly 300 also includes a valve needle 320, which is at least partially disposed in the mounting cavity 110. A bearing housing 310 is sleeved over the valve needle 320, and the valve needle 320 is configured to be axially movable relative to the bearing housing 310 to control the opening of the valve port passage 311.

[0029] like Figure 5 As shown, the valve body 100 also has a recess 120, which is part of the mounting cavity 110. The recess 120 is recessed from the top surface 101 of the valve body 100 along the third direction D3 toward the bottom surface 102. Optionally, the circumferential wall of the recess 120 has threads, and the valve assembly 300 is connected to the valve body 100 by the threads.

[0030] like Figure 4As shown, the valve assembly 300 also includes a gasket 330, a sleeve 340, a coil component 350, a magnetic rotor 360, and a lead screw 370. The gasket 330 is fixedly connected to the sleeve 340, which is sleeved over the valve needle 320 and the magnetic rotor 360. The magnetic rotor 360 is limitedly connected to the end of the lead screw 370 away from the valve body 100. The coil component 350 is sleeved over the sleeve 340 and is configured to rotate the magnetic rotor 360. When the coil component 350 is energized, the magnetic rotor 360 drives the lead screw 370 to rotate, thereby causing the valve needle 320 to move axially.

[0031] like Figure 4 and Figure 6 As shown, at least a portion of the valve assembly 300 is disposed within the mounting cavity 110. The valve assembly 300 includes a bearing housing 310, which is at least partially disposed within the mounting cavity 110, and the valve assembly 300 is sealingly connected to the valve body 100. Figures 8 to 13 As shown, the bearing housing 310 has a first inlet 312, a valve port flow channel 311, and a first channel 316. Along the fluid flow direction, the first channel 316 is located downstream of the first inlet 312 and the valve port flow channel 311. The first channel 316 can be recessed from the end face of the bearing housing 310 near the bottom surface 102 along a third direction D3 towards the top surface 101. Of course, by changing the fluid inlet and outlet, the fluid can also flow in the opposite direction. It should be noted that the bearing housing 310 can be composed of one or more components. When the bearing housing 310 is composed of multiple components, the first inlet 312, the valve port flow channel 311, and the first channel 316 can be located on different components.

[0032] Among them, such as Figure 4 As shown, the valve assembly also includes a silencing component 200, which is connected to the valve assembly 300 in a limiting connection. Optionally, the silencing component 200 may also be located in the first flow channel 107 or the second flow channel 108, such as... Figure 10 As shown, the silencing component 200 has a silencing hole 212, which can break up larger air bubbles in the fluid and uniformly refine the air bubbles in the medium to achieve a silencing effect. The silencing component 200 includes a rectifier 210, which has a silencing hole 212 and a bypass hole 211. The flow cross-sectional area of ​​a single bypass hole 211 is larger than the flow cross-sectional area of ​​a single silencing hole 212. The first inlet 312 is connected to the first channel 316 and the bypass through the valve port flow channel 311. Both the hole 211 and the silencer hole 212 are connected, and the fluid can flow through the mounting cavity 110, the first inlet 312, the valve port flow channel 311, the first channel 316 and the bypass hole 211. Optionally, the bypass hole 211 is located outside the valve assembly 300 or the bypass hole 211 is connected to the mounting cavity 110. The bypass hole 211 allows impurities accumulated on the rectifier 210 to be discharged from the rectifier 210 through the bypass hole 211, thereby reducing the blockage of the silencer hole 212 by impurities.

[0033] The rectifier 210 has a hollow center and a rectifier cavity 213. The first inlet 312 is connected to the first channel 316 and the rectifier cavity 213 through the valve port flow channel 311. Both the refrigerant and impurities in the refrigerant flow through the first channel 316. Then, a portion of the refrigerant flows into the rectifier cavity 213 and passes through the silencer hole 212 of the silencer assembly 200. The impurities in the refrigerant do not flow through the silencer hole 212 but are discharged from the silencer assembly 200 through the bypass hole 211.

[0034] The rectifier 210 includes a bottom wall portion 215 and a side wall portion 214. Along the axial direction of the rectifier 210, the bottom wall portion 215 is located on the side of the side wall portion 214 away from the valve assembly 300, and the extension line of the side wall portion 214 is parallel to or intersects the center line of the bottom wall portion 215. It has a hollow inner cavity rectifier chamber 213 for guiding fluid flow. The rectifier 210 is mainly composed of the side wall portion 214 and the bottom wall portion 215. The side wall portion 214 is cylindrical, and the bottom wall portion 215 is disc-shaped. The bottom wall portion 215 is connected to one end of the side wall portion 214 to form a closed end, while the other end of the side wall portion 214 is open towards the valve assembly 300. Optionally, the rectifier 210 is connected to the valve assembly 300 through its open end, so that fluid can flow from the valve assembly 300 into the interior of the rectifier 210.

[0035] The sidewall portion 214 extends axially around the rectifier 210, forming the main body of the rectifier 210. The extension line of the sidewall portion 214 can be parallel to the centerline of the bottom wall portion 215, in which case the rectifier 210 is cylindrical. This structure is simple, easy to manufacture, and provides low resistance to fluid flow. Alternatively, the extension line of the sidewall portion 214 can intersect the centerline of the bottom wall portion 215, in which case the rectifier 210 is conical or flared. When the extension line of the sidewall portion 214 intersects the centerline of the bottom wall portion 215, the rectifier 210 can achieve a diffusion or contraction effect on the fluid, helping to regulate the fluid flow velocity and pressure. For example, if the inlet diameter of the rectifier 210 is smaller than the outlet diameter, this structure helps to slow down the fluid flow rate and reduce noise. In one embodiment, along the axial extension direction of the rectifier 210, the inner diameter of the sidewall portion 214 remains constant or gradually decreases. When the inner diameter of the sidewall portion 214 remains constant, it is cylindrical; when the inner diameter of the sidewall portion 214 gradually decreases, it is conical. This makes the sidewall of the rectifier cavity 213 a smooth surface. The inclined arrangement of the sidewall portion 214 reduces the direct impact of the refrigerant on the sidewall portion 214 and the bottom wall portion 215, ensuring the smoothness of fluid flow within the rectifier cavity 213, improving the buffering effect of the rectifier cavity 213, and reducing the noise generated by the bursting of bubbles on the impact wall. In one embodiment, the bottom wall portion 215 is conical, and along the direction away from the valve assembly 300, the inner diameter of the bottom wall portion 215 gradually decreases. When the bypass hole 211 is located in the bottom wall portion 215, the inclined arrangement of the bottom wall portion 215 facilitates the discharge of impurities in the refrigerant.

[0036] Multiple silencing holes 212 are evenly distributed at intervals on the bottom wall portion 215 and / or the side wall portion 214. This arrangement ensures uniform fluid distribution, improves silencing and bypass effects, and bypass holes 211 are located on the bottom wall portion 215 and / or the side wall portion 214. There can be one or more bypass holes 211; when there are multiple, they are evenly distributed at intervals on the bottom wall portion 215 and / or the side wall portion 214. In one embodiment, the silencing holes 212 are located on the bottom wall portion 215, allowing some fluid to flow out through these holes, reducing the impact of the fluid on the bottom wall portion 215 and lowering noise. In another embodiment, the silencing holes 212 are located on the side wall portion 214, which can disperse the flow direction of the fluid, reduce turbulence, and further reduce noise. In this case, the extending direction of the silencing holes 212 is perpendicular or inclined to the extending direction of the side wall portion 214, wherein the inclined silencing holes 212 result in less resistance to the fluid. The number, size, and distribution of the silencing holes 212 can be designed as needed to achieve the best silencing effect. In one embodiment, the silencing holes 212 are located in the bottom wall portion 215, and the bypass hole 211 is located in the side wall portion 214. The bypass hole 211 is located at the end of the side wall portion 214 near the bottom wall portion 215, which is beneficial for discharging impurities and reducing the retention of impurities in the bottom wall portion 215. Specifically, the bypass hole 211 is located in the side wall portion 214. Along the axial direction of the rectifier 210, the side of the bypass hole 211 away from the valve assembly 300 intersects with the end face of the bottom wall portion 215 near the valve assembly 300. It can be understood that the bypass hole 211 starts from the intersection of the end face of the side wall portion 214 and the bottom wall portion 215 near the valve assembly 300 and extends towards the direction near the valve assembly 300. To facilitate the discharge of impurities, the bypass hole 211 can be, optionally, semi-circular, with its center flush with the end face of the bottom wall 215 near the valve assembly 300, thus significantly increasing the area through which impurities pass. Alternatively, one side of the center of the bypass hole 211 can be semi-circular, while the other side is not. When the center of the bypass hole 211 is not flush with the end face of the bottom wall 215 near the valve assembly 300, the distance L between the centerline of the bypass hole 211 and the end face of the bottom wall 215 near the valve assembly 300 must be less than or equal to the radius r of the bypass hole 211, thus significantly increasing the area through which impurities pass and improving the passage of impurities. In one embodiment, the bypass hole 211 is located in the bottom wall portion 215. Optionally, the bypass hole 211 is located at the radial edge of the bottom wall portion 215. This arrangement can reduce the situation where the fluid flowing into the rectifier cavity 213 flows directly out of the rectifier 210 through the bypass hole 211, thereby improving the noise reduction effect of the fluid.

[0037] It should be noted that the locations of the aforementioned silencer holes 212 and bypass holes 211 are not unique and can be combined with each other. For example, the bottom wall 215 of the rectifier 210 has a bypass hole 211, and the side wall 214 of the rectifier 210 has a silencer hole 212. Optionally, some of the silencer holes 212 can also be located at the bottom of the rectifier 210. The top of the rectifier 210 can be fixedly connected to the valve assembly 300 by means of snap-fit ​​connection, threaded connection, or welding. For example, the rectifier 210 can be limited by the wall of the first channel 316. It should be noted that when the silencer hole 212 or bypass hole 211 is located on the side wall 214, in order to avoid the wall of the first channel 316 obstructing the refrigerant from being discharged from the rectifier 210 through the silencer hole 212 or bypass hole 211, the silencer hole 212 or bypass hole 211 needs to be at least partially located outside the valve assembly 300 so that the refrigerant can be discharged normally.

[0038] When the valve device is installed in the valve body 100, along the radial direction of the mounting cavity 110, when the side wall portion 214 of the rectifier 210 has a bypass hole 211, there is a gap between the port of the bypass hole 211 located on the outer wall portion of the rectifier 210 and the inner wall portion of the valve body 100, allowing impurities to be smoothly discharged from the silencer assembly 200 and enter the valve body 100. It can be understood that the port of the bypass hole 211 located on the outer wall portion of the rectifier 210 communicates with the second flow channel 108, and the flow cross-section of the second flow channel 108 is larger than the flow cross-section of the port of the bypass hole 211, thereby allowing impurities to be discharged from the valve body 100. Specifically, as shown... Figure 6 As shown, the mounting cavity 110 has a first expansion section 111, a limiting section 112, and a second expansion section 113. Along the axial direction of the mounting cavity 110, the first expansion section 111 is located at one end of the limiting section 112 near the first flow channel 107. The valve assembly 300 is sealed to the wall of the limiting section 111. The second expansion section 113 is located at one end of the limiting section 112 near the second flow channel 108. The bearing seat 310 is sealed to the wall of the limiting section 112. The valve body 100 has a gap between the inner wall of the second expansion section 113 and the port of the bypass hole 211 located on the outer wall of the rectifier 210. The flow cross-section of the gap is larger than the flow cross-sectional area of ​​the silencer hole 212. The port of the bypass hole 211 located on the outer wall of the rectifier 210 communicates with the second flow channel 108. Optionally, the diameter of the second expansion section 113 is larger than the diameter of the limiting section 112, which is beneficial for the discharge of impurities.

[0039] like Figure 13As shown, in one embodiment, the silencing assembly 200 can be limited to the wall of a first channel 316. The first channel 316 includes a first flow cavity 317 and a second flow cavity 318. The inner diameter of the first flow cavity 317 gradually increases from the end of the first channel 316 near the valve port flow channel 311 toward the direction near the silencing assembly 200. This arrangement helps to reduce the vaporization caused by the pressure drop of the refrigerant. The second flow cavity 318 is located at the end of the first flow cavity 317 away from the valve port flow channel 311. The inner diameter of the second flow cavity 318 is greater than or equal to the inner diameter of the first flow cavity 317. The wall of the second flow cavity 318 is limited to be connected to the silencing assembly 200.

[0040] like Figures 8 to 13 As shown, one port of the bypass hole 211 is located on the inner wall surface of the rectifier 210, and the other port is located on the outer wall surface of the rectifier 210. At least part of the bypass hole 211 penetrates the wall of the rectifier 210. The bypass hole 211 can be circular, square, triangular, elliptical, or other shapes. The number of bypass holes 211 is at least one, and can be two, three, four, or more.

[0041] Furthermore, the silencing component 200 is sealed to the valve assembly 300. This sealed connection means that there will be no fluid leakage at the connection between the silencing component 200 and the valve assembly 300 during fluid flow. The sealing connection can be achieved through snap-fit, threaded, or welded connections. Specifically, the silencing component 200 is sealed to the bearing housing 310. In one embodiment, the silencing component 200 further includes a connector 220, which is connected to the valve assembly 300 in a limiting connection. The connector 220 has a first limiting groove 221, and a portion of the sidewall 214 is located within... The first limiting groove 221 and the side wall portion 214 are connected to the connector 220. Optionally, the first limiting groove 221 is located on the side of the connector 220 away from the valve assembly 300, and a part of the side wall portion 214 is engaged in the first limiting groove 221. Optionally, the first limiting groove 221 is located on the inner wall of the connector 220. The first limiting groove 221 can be a continuous annular groove or a groove with uniform intervals. Correspondingly, the outer wall surface of the side wall portion 214 has a protrusion corresponding to the shape of the first limiting groove 221, so that the rectifier 210 can be connected to the connector 220. In one embodiment, the bearing seat 310 of the valve assembly 300 has a limiting groove on the end face near the muffler assembly 200. The connector 220 is snapped into the limiting groove, and the limiting groove can also guide and limit the connector 220. Specifically, along the axial direction of the valve assembly 300, the side of the valve assembly 300 near the muffler assembly 200 has a second limiting groove 319. The connector 220 is at least partially located in the second limiting groove 319. The diameter of the second limiting groove 319 is larger than the outer diameter of the first channel 316. The connector 220 is welded to the valve assembly 300, threadedly connected, or snapped into it; or, the connector 220 is at least partially located in the first channel 316, and the connector 220 is snapped into or threadedly connected to the wall defining the first channel 316. This arrangement facilitates the connection and disassembly of the muffler assembly 200 and the valve assembly 300. On the other hand, compared to setting the bypass hole 211 in the bearing housing 310, the use of separate processing and drilling holes in the rectifier 210 to form the bypass hole 211 helps to reduce the processing difficulty and reduce the assembly steps of the muffler assembly 200 and the valve assembly 300, making installation easier.

[0042] Furthermore, to ensure that most of the refrigerant flows through the muffler assembly 200 to eliminate air bubbles and thus improve noise reduction, the muffler assembly 200 has multiple muffler holes 212. The total flow cross-sectional area of ​​the bypass holes 211 is smaller than the total flow cross-sectional area of ​​the muffler holes 212. When there are multiple bypass holes 211, the sum of the flow cross-sections of the multiple bypass holes 211 is the total flow cross-sectional area of ​​the bypass holes 211. A larger flow cross-sectional area can reduce flow resistance and allow the fluid to move in the direction of lower flow resistance. Therefore, more refrigerant flows through the muffler section 220, improving the muffler effect.

[0043] When assembling the expansion valve, the muffler 220 can be installed into the rectifier 210 first, then the rectifier 210 can be fixedly connected to the valve assembly 300, and then the valve assembly 300 can be connected to the valve body 100, with at least a portion of the valve assembly 300 extending into the mounting cavity 110.

[0044] like Figure 10 As shown, the bearing housing 310 includes a first connecting portion 313, a second connecting portion 314, and a valve port portion 315. The valve port portion 315 has a valve port flow channel 311, which is located between the first connecting portion 313 and the second connecting portion 314. A first inlet 312 is located in the first connecting portion 313, and a first channel 316 is located in the second connecting portion 314. Along the third direction D3, the first channel 316 is recessed from the end of the second connecting portion 314 away from the valve port flow channel 311 towards the first connecting portion 313. The first connecting portion 313 and the second connecting portion 314 are integrally formed, which facilitates the manufacturing of the bearing housing 310. Optionally, the first connecting portion 313 and the second connecting portion 314 are separate structures. It is understood that the valve port flow channel 311 and the first channel 316 are arranged in the third direction D3, and the first channel 316 is closer to the bottom surface 102.

[0045] It should be noted that the above-described embodiments only illustrate several implementation methods of this application, and while the descriptions are relatively specific, they should not be construed as limiting the scope of the utility model patent. It should be pointed out that those skilled in the art can make several modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. A valve device, characterized in that: The device includes a valve assembly (300) and a silencing assembly (200). The silencing assembly (200) is connected to the valve assembly (300) in a limiting manner. The valve assembly (300) has a first inlet (312), a valve port flow channel (311), and a first channel (316). The silencing assembly (200) includes a rectifier (210). The rectifier (210) has a rectifier cavity (213), a silencing hole (212), and a bypass hole (211). The first inlet (312) is connected to the first channel (316), the rectifier cavity (213), the silencing hole (212), and the bypass hole (211) through the valve port flow channel (311). The flow cross-sectional area of ​​a single bypass hole (211) is larger than the flow cross-sectional area of ​​a single silencing hole (212).

2. The valve device according to claim 1, characterized in that: The rectifier (210) has a plurality of the silencing holes (212) and at least one bypass hole (211), wherein the total flow cross-sectional area of ​​the silencing holes (212) is greater than the total flow cross-sectional area of ​​the bypass hole (211).

3. The valve device according to claim 2, characterized in that: The rectifier (210) includes a bottom wall portion (215) and a side wall portion (214). The rectifier cavity (213) has an opening at the end of the rectifier (210) away from the bottom wall portion (215). Along the axial direction of the rectifier (210), the bottom wall portion (215) is located on the side of the side wall portion (214) away from the valve assembly (300). The extension line of the side wall portion (214) is parallel to or intersects the center line of the bottom wall portion (215). The silencing hole (212) is located in the bottom wall portion (215) and / or the side wall portion (214). The bypass hole (211) is located in the bottom wall portion (215) and / or the side wall portion (214).

4. The valve device according to claim 3, characterized in that: The silencing assembly (200) is positioned and connected to the wall portion defining the first channel (316); the silencing hole (212) is located on the side wall portion (214), and the silencing hole (212) is at least partially located outside the valve assembly (300); or, the bypass hole (211) is located on the side wall portion (214), and the bypass hole (211) is at least partially located outside the valve assembly (300).

5. The valve device according to claim 4, characterized in that: The bypass hole (211) is located on the side wall portion (214) along the axial direction of the rectifier (210). The side of the bypass hole (211) away from the valve assembly (300) intersects with the end face of the bottom wall portion (215) near the valve assembly (300).

6. The valve device according to claim 3, characterized in that: The bypass hole (211) is located on the bottom wall (215), the silencing hole (212) is located on the side wall (214), and a plurality of silencing holes (212) are evenly distributed on the side wall (214) at intervals. The extension direction of the silencing hole (212) is perpendicular or inclined to the extension direction of the side wall (214).

7. The valve device according to claim 6, characterized in that: Along the axial extension direction of the rectifier (210), the inner diameter of the side wall portion (214) remains unchanged or gradually decreases; and / or the bottom wall portion (215) is tapered, and along the direction away from the valve assembly (300), the inner diameter of the bottom wall portion (215) gradually decreases.

8. The valve device according to any one of claims 3 to 7, characterized in that: The silencing assembly (200) also includes a connector (220) that is limitedly connected to the valve assembly (300), the connector (220) having a first limiting groove (221), a portion of the side wall portion (214) being located in the first limiting groove (221) and the side wall portion (214) being connected to the connector (220).

9. The valve device according to claim 8, characterized in that: Along the axial direction of the valve assembly (300), the valve assembly (300) has a second limiting groove (319) on the side near the muffler assembly (200), the connector (220) is at least partially located in the second limiting groove (319), the diameter of the second limiting groove (319) is greater than the outer diameter of the first channel (316), the connector (220) is welded to the valve assembly (300) or threaded or snapped; or, the connector (220) is at least partially located in the first channel (316), and the connector (220) is snapped or threaded to the wall defining the first channel (316).

10. An expansion valve, characterized in that: The expansion valve includes the valve device according to any one of claims 1 to 9, the expansion valve further includes a valve body (100), the valve body (100) having a first flow channel (107), a second flow channel (108) and a mounting cavity (110), the valve assembly (300) being located in the mounting cavity (110) and the valve assembly (300) being sealed to the valve body (100), the first flow channel (107) being able to communicate with the silencing hole (212) and the bypass hole (211) through the valve port flow channel (311), the silencing hole (212) and the bypass hole (211) being connected to the mounting cavity (110), the first flow channel (107) and the second flow channel (108) being connected through the mounting cavity (110), and along the radial direction of the mounting cavity (110), there is a gap between the rectifier (210) and the inner wall of the valve body (100).

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