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 support, support has bypass passage, and bypass passage is located in the lateral wall of support, silencing subassembly has sound reduction hole, first inlet is communicated with first passage, sound reduction hole, bypass passage by valve port flow channel, single bypass passage's flow cross-sectional area is greater than the flow cross-sectional area of single sound reduction hole, and bypass passage is located outside valve assembly. By setting bypass passage on support, and single bypass passage is greater than the flow cross-sectional area of single sound reduction hole, so that impurities in fluid can flow out silencing subassembly through bypass passage, reduce the blockage of impurities to silencing subassembly.

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] During use, the expansion valve generates significant noise because the refrigerant is often in a two-phase state of gas-liquid mixture. When large air bubbles are present in the refrigerant, a silencing component is installed to eliminate the noise. However, after prolonged operation, impurities in the refrigerant can clog the silencing component, reducing its 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 bracket with a bypass channel located on the side wall of the bracket. The silencing assembly has a silencing hole. The first inlet is connected to the first channel, the silencing hole, and the bypass channel through the valve port flow channel. The flow cross-sectional area of ​​a single bypass channel is larger than the flow cross-sectional area of ​​a single silencing hole, and the bypass channel is located outside the valve assembly.

[0006] According to the valve device provided by this utility model, the fluid flows through the first inlet, the valve port flow channel, and the first channel, and passes through the silencing holes and bypass channels in the silencing component. The fluid flowing through the silencing holes in the silencing component can effectively eliminate air bubbles in the refrigerant, thereby helping to reduce the noise generated by the air bubbles. The bracket and the valve component are set separately, and the bypass channel is set in the bracket, which facilitates the processing of the bypass channel and the assembly of the silencing component and the valve component. The flow cross-sectional area of ​​a single bypass channel is larger than the flow cross-sectional area of ​​a single silencing hole, which can help impurities in the refrigerant to flow out of the valve device through the bypass channel, thereby reducing the situation of impurities clogging the silencing component and improving 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, and the valve assembly is sealed to the valve body. The first flow channel can communicate with the bypass channel through the valve port flow channel. The bypass channel communicates 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 port of the bypass channel located on the outer wall of the bracket 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. Impurities in the fluid can flow into the valve body through the bypass channel and flow out of the expansion valve through the second flow channel with the fluid. There is a gap between the port of the bypass channel on the outer wall of the bearing seat and the inner wall of the valve body, which is conducive to the smooth discharge of impurities from the silencing component. 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 utility model;

[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 another structure of the valve assembly at position B provided in one embodiment;

[0018] Figure 10 yes Figure 9 An enlarged schematic diagram of the bearing housing at position B in a valve assembly provided in one embodiment;

[0019] Figure 11 yes Figure 9 A schematic diagram of the exploded structure of the silencing component in a valve assembly provided in one embodiment;

[0020] Figure 12 yes Figure 11 An enlarged schematic diagram of the structure of the silencer component at position B in a valve assembly provided in one embodiment;

[0021] Figure 13 yes Figure 11 A bottom view of the pressure block structure in a valve assembly provided in one embodiment;

[0022] Figure 14 yes Figure 9 An enlarged schematic diagram of the structure of the silencer component at position B in a valve assembly provided in one embodiment;

[0023] Figure 15 This utility model provides an exploded structural diagram of the silencer section in a valve device according to one embodiment.

[0024] 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 diameter expansion section; 112. Diameter limiting section; 113. Second diameter expansion section; 120. Settlement tank; 200. Silencing assembly; 210. Bracket; 211. Bypass channel; 220. Silencing part; 221. Silencing hole; 222. First silencing part; 223. Second silencing part; 224. Mixing chamber; 230. Pressure block; 231. First limiting part; 232. 233, Second limiting part; 234, Connecting channel; 235, Third limiting part; 236, Protrusion; 240, Washer ring; 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; 320, Valve needle; 330, Gasket; 340, Sleeve; 350, Coil assembly; 360, Magnetic rotor; 370, Lead screw; D1, First direction; D2, Second direction; D3, Third direction. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] like Figures 1 to 6As 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.

[0031] 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.

[0032] 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.

[0033] like Figure 4 As 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.

[0034] like Figure 4 and Figure 6As 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.

[0035] 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, such as... Figure 15 As shown, the silencing component 200 has silencing holes 221, which can break up larger air bubbles in the fluid, uniformly refine the air bubbles in the medium, and achieve a silencing effect. Figures 6 to 8 As shown, the silencing assembly 200 includes a bracket 210, which has a bypass channel 211. The flow cross-sectional area of ​​a single bypass channel 211 is larger than the flow cross-sectional area of ​​a single silencing hole 221. The first inlet 312 is connected to the first channel 316, the bypass channel 211, and the silencing hole 221 through the valve port flow channel 311. 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 channel 211. The bypass channel 211 is located outside the valve assembly 300. The bypass channel 211 allows impurities accumulated on the silencing assembly 200 to be discharged from the silencing assembly 200 through the bypass channel 211.

[0036] Both the refrigerant and impurities in the refrigerant flow through the first channel 316. Then, a portion of the refrigerant flows through the silencing hole 221 of the silencing component 200, while the impurities in the refrigerant do not flow through the silencing hole 221, but are discharged from the silencing component 200 through the bypass channel 211.

[0037] Optionally, the bracket 210 has a bypass channel 211 and a silencer hole 221. The bracket 210 is hollow in the middle, and the bypass channel 211 is opened at the bottom of the bracket 210. The silencer hole 221 is opened on the circumferential wall of the bracket 210. Optionally, some of the silencer holes 221 can also be opened at the bottom of the bracket 210. The top of the bracket 210 can be fixedly connected to the valve assembly 300 by means of snap-fit ​​connection, threaded connection or welding.

[0038] When the valve device is installed in the valve body 100, there is a gap between the port of the bypass channel 211 located on the outer wall of the bracket 210 and the inner wall of the valve body 100 along the radial direction of the mounting cavity 110. This allows 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 channel 211 located on the outer wall of the bracket 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 channel 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 channel 211 located on the outer wall of the bracket 210. The flow cross-section of the gap is larger than the flow cross-sectional area of ​​the silencer hole 221. The port of the bypass channel 211 located on the outer wall of the bracket 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 10 As shown, the first channel 316 includes a first flow chamber 317 and a second flow chamber 318. The inner diameter of the first flow chamber 317 gradually increases from the end of the first channel 316 near the valve port flow channel 311 toward the direction near the muffler assembly 200. This arrangement helps to reduce the vaporization caused by the pressure drop of the refrigerant. The second flow chamber 318 is located at the end of the first flow chamber 317 away from the valve port flow channel 311. The inner diameter of the second flow chamber 318 is greater than or equal to the inner diameter of the first flow chamber 317. The second flow chamber 318 can be connected to the muffler assembly 200 in a limiting connection.

[0040] like Figures 8 to 13As shown, one port of the bypass channel 211 is located on the inner wall of the bracket 210, and the other port is located on the outer wall of the bracket 210. At least a portion of the bypass channel 211 penetrates the wall of the bracket 210. In order to facilitate the discharge of impurities in the refrigerant from the silencing assembly 200, the silencing assembly 200 also includes at least one silencing part 220. The silencing part 220 is confined within the bracket 210 and has a silencing hole 221. Along the axial direction of the bracket 210, at least a portion of the bypass channel 211 is located on the side of all the silencing parts 220 closest to the valve assembly 300. It can be understood that in the axial direction of the silencing assembly 200, the bypass channel 211 is closer to the valve port flow channel 311 than the silencing part 220. This arrangement allows impurities to be discharged from the bracket 210 through the bypass channel 211.

[0041] Furthermore, to facilitate the discharge of impurities, the muffler component 200, such as... Figure 12As shown, along the axial direction of the bracket 210, the length of the bypass channel 211 is defined as r, and the distance between the center line of the bypass channel 211 and the end face of the silencer 220 near the valve assembly 300 is defined as L, where L≤r / 2. This setting allows impurities remaining on the silencer assembly 200 to more easily enter the bypass channel 211 and be discharged from the bracket 210. The bypass channel 211 can be circular, square, triangular, elliptical, or other shapes. The number of bypass channels 211 is at least one, and can be two, three, four, or more. Furthermore, the bracket 210 is sealed to the valve assembly 300. This sealed connection means that there will be no fluid leakage at the connection between the bracket 210 and the valve assembly 300 during fluid flow. The sealing connection can be achieved through snap-fit, threaded, or welded connections. By providing the bracket 210 and sealing it to the valve assembly 300, specifically by sealing the bracket 210 to the bearing housing 310, it facilitates the connection and disassembly of the muffler assembly 200 and the valve assembly 300. Furthermore, compared to providing a bypass channel 211 in the bearing housing 310, using a separate machining method and drilling holes in the bracket 210 to form the bypass channel 211 reduces machining difficulty and assembly steps between the muffler assembly 200 and the valve assembly 300, thus simplifying installation. Optionally, for example, the bearing housing 310 of the valve assembly 300 may have a limiting groove on the end face near the muffler assembly 200. The bracket 210 is snapped into this limiting groove, which also guides and limits the bracket 210. Optionally, the bypass channel 211 is recessed from the end of the bracket 210 near the valve assembly 300 toward the direction away from the valve assembly 300. Optionally, along the axial direction of the bracket 210, the bypass channel 211 is located between the two end faces of the bracket 210. This arrangement makes the end face of the bracket 210 near the valve assembly 300 a continuous surface, which is beneficial to improving the strength of the bracket 210. When the bracket 210 and the valve assembly 300 are fixed by welding, the continuous surface of the end face of the bracket 210 near the valve assembly 300 is beneficial to make the weld between the bracket 210 and the valve assembly 300 a complete arc, which improves the welding strength and reduces the welding difficulty.

[0042] Furthermore, to ensure that most of the refrigerant flows through the muffler assembly 200 to eliminate air bubbles and improve noise reduction, the muffler assembly 200 has multiple muffler holes 221. The total flow cross-sectional area of ​​the bypass channel 211 is smaller than the total flow cross-sectional area of ​​the muffler holes 221. When there are multiple bypass channels 211, the sum of the flow cross-sections of the multiple bypass channels 211 is the total flow cross-sectional area of ​​the bypass channels 211. When there are multiple muffler sections 220, the total flow cross-sectional area of ​​the muffler holes 221 refers to the total flow cross-sectional area of ​​the muffler holes 221 at the end of the muffler section 220 near the valve port flow channel 311. A larger flow cross-sectional area can reduce flow resistance, causing 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] like Figures 8 to 10 As shown, the silencing part 220 is fixedly installed in the bracket 210, so that the silencing component 200 can be more secure. The fixed installation method, such as interference fit, snap-fit, welding, threaded connection, etc., reduces the silencing part 220 from shaking in the bracket 210 and affecting the silencing effect, and reduces the misalignment phenomenon caused by fluid impact on the silencing component 200.

[0044] To further improve the elimination of air bubbles in the fluid, the silencing assembly 200 includes at least two spaced-apart silencing sections 220. At least one silencing section 220 has a silencing hole 221 communicating with a valve port flow channel 311 through a silencing hole 221 of the other at least one silencing section 220. A mixing chamber 224 is provided between the spaced-apart silencing sections 220. The mixing chamber 224 communicates with the silencing hole 221, forming a pressure chamber. Under pressure, this promotes further bubble breakage. Optionally, the silencing section 220 includes a first silencing section 222 and a second silencing section 223. The mixing chamber 224 is formed between the first silencing section 222 and the second silencing section 223. The mixing chamber 224 increases the time for fluid silencing, which is beneficial for improving the elimination of air bubbles in the fluid. To facilitate the forming of the mixing cavity 224, the silencing assembly 200 also includes at least one gasket 240. The gasket 240 is located between at least one silencing part 220 and another silencing part 220. The inner wall of the gasket 240 defines at least a portion of the mixing cavity 224. Since the gasket 240 is a hollow annular structure, the refrigerant can pass through the middle of the gasket 240. The hollow arrangement of the gasket 240 is conducive to the flow of refrigerant. Optionally, to improve the ease of assembly of the gasket 240, the middle of the gasket 240 is broken, that is, the gasket 240 is not a continuous annular structure but a broken structure.

[0045] Optionally, the silencing section 220 is a silencing filter screen, which can be formed by sintering multiple layers of filter screens with a mesh size of 60 to 100, such as two, three, or more layers of filter screens. Optionally, the silencing section 220 is a plate-like structure with silencing holes 221. Making the silencing section 220 a porous plate-like structure facilitates the connection between the silencing section 220 and the support 210. It can be understood that the silencing assembly 200 can be composed entirely of filter screens, or entirely of plate-like structures with silencing holes 221, or a combination of silencing sections 220 formed by sintering multiple layers of filter screens and silencing sections 220 with plate-like structures with silencing holes 221. That is, the first silencing section 222 is a filter screen, and the second silencing section 223 is a porous plate-like structure. Both the first silencing section 222 and the second silencing section 223 have small-diameter silencing holes 221, which uniformly refine the air bubbles in the medium to achieve a silencing effect.

[0046] Furthermore, such as Figure 9 and Figure 11 As shown, in order to improve the convenience of connecting the bracket 210 and the valve assembly 300, the muffler assembly 200 also includes a pressure block 230. The pressure block 230 includes a first limiting part 231 and a second limiting part 232. The first limiting part 231 and the second limiting part 232 are arranged along the axial direction of the pressure block 230. The first limiting part 231 is limited and connected to the bracket 210, and the second limiting part 232 is limited and connected to the valve assembly 300. The pressure block 230 also has a second channel 233, which is connected to the first channel 316, the muffler hole 221, and the bypass channel 211. The bracket 210 and the pressure block 230 are connected in a limiting manner to form a whole. The second limiting part 232 can limit and guide the bracket 210. When the bracket 210 is welded to the valve assembly 300, the second limiting part 232 cooperates with the second flow cavity 318, which helps to improve the stability of the welding between the bracket 210 and the valve assembly 300. Furthermore, the second channel 233 ensures that the pressure block 230 provides limiting and guiding without obstructing the flow of fluid. It should be noted that the pressure block 230 and the bracket 210 can be a single piece.

[0047] Specifically, at least a portion of the first limiting part 231 is located within the bracket 210, and the first limiting part 231 is snap-fitted, threaded, or interference-fitted with the bracket 210. At least a portion of the second limiting part 232 is located within the first channel 316, and the second limiting part 232 is snap-fitted, threaded, or interference-fitted with the bearing seat 310. The inner diameter of the first limiting part 231 is greater than or equal to the inner diameter of the second limiting part 232. Optionally, the pressure block 230 is cylindrical, and the outer diameter of the first limiting part 231 is equal to the outer diameter of the second limiting part 232. Optionally, the outer diameter of the first limiting part 231 is greater than the outer diameter of the second limiting part 232. This arrangement ensures that the thickness between the wall of the first channel 316 in the bearing seat 310 and the outer wall of the bearing seat 310 is not too small, guaranteeing the stability of the connection between the pressure block 230 and the valve assembly 300, and also facilitating the stability of the processing. Optionally, along the axial direction of the muffler assembly 200, there is a gap between the first limiting part 231 and the muffler part 220, the bypass channel 211 is located between the first limiting part 231 and the muffler part 220, and the second channel 233 is connected to the bypass channel 211.

[0048] Furthermore, such as Figure 11 and Figure 13 As shown, the first limiting part 231 also has a connecting channel 234. The connecting channel 234 can be one or more. The bypass channel 211 and the second channel 233, as well as at least a portion of the connecting channels 234, are all connected, further ensuring that the pressure block 230 does not obstruct the flow of fluid. The connecting channel 234 is recessed from the end of the first limiting part 231 away from the second limiting part 232 towards the second limiting part 232, reducing the obstruction of the first limiting part 231 on the movement of impurities located on the silencing part 220 towards the bypass channel 211, which is beneficial for the movement of impurities. Discharged, along the radial direction of the bracket 210, the projection of the bypass channel 211 onto the first limiting part 231 falls within the range of the connecting channel 234. It can be understood that the bypass channel 211 and the connecting channel 234 are arranged facing each other, and the opening area of ​​a single connecting channel 234 is greater than or equal to the opening area of ​​a single bypass channel 211. This arrangement is beneficial for the connecting channel 234 and the bypass channel 211 to have sufficient connecting area. At the same time, when the pressure block 230 is assembled with the bracket 210, the hole-aligning operation of the connecting channel 234 and the bypass channel 211 is eliminated, simplifying the assembly steps.

[0049] Optionally, the number of bypass channels 211 is greater than or equal to the number of connecting channels 234. Setting the number of bypass channels 211 to be greater than the number of connecting channels 234 ensures that when the pressure block 230 is assembled with the bracket 210, there will always be a connecting channel 234 and a bypass channel 211 connected. Therefore, it is not necessary to perform hole alignment operations on the connecting channels 234 and the bypass channels 211, simplifying the assembly steps. Optionally, the bracket 210 and the pressure block 230 can also achieve alignment of the connecting channels 234 and the bypass channels 211 by setting limiting protrusions and limiting grooves.

[0050] Optional, such as Figure 11 and Figure 13 As shown, the first limiting part 231 also includes a protrusion 236. Along the axial direction of the muffler assembly 200, the protrusion 236 protrudes towards the muffler part 220. The protrusions 236 are circumferentially spaced around the center line of the pressure block 230. There are at least two protrusions 236, and there can also be three, four, or more. The protrusions 236 spaced circumferentially along the center line of the pressure block 230 have a connecting channel 234 between them, and the inner wall surface of the protrusion 236 defines a portion of the second channel 233. The protrusions 236 extending axially along the axial direction of the pressure block 230 can increase the contact area between the first limiting part 231 and the bracket 210, improving the stability of their connection. On the other hand, they can also abut against the muffler part 220, compressing the muffler part 220 and improving its stability.

[0051] like Figure 12 As shown, the bracket 210 includes a third limiting portion 235, which is located at the end of the bracket 210 away from the valve assembly 300. The third limiting portion 235 protrudes from the inner wall surface of the bracket 210 toward the centerline of the bracket 210. Along the axial direction of the bracket 210, one end of the silencing portion 220 abuts against the first limiting portion 231, and the other end of the silencing portion 220 abuts against the third limiting portion 235. This arrangement allows the silencing portion 220 to be positioned between the bracket 210 and the pressure block 230 in the axial direction of the bracket 210, reducing the shaking of the silencing portion 220 under fluid impact and improving stability.

[0052] When assembling the expansion valve, the muffler 220 can be installed into the bracket 210 first, then the bracket 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.

[0053] like Figure 10As 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.

[0054] In one embodiment, when installing the expansion valve, firstly, a muffler 220 is installed into the bracket 210; then, a washer 240 is installed into the bracket 210 until the washer 240 contacts the muffler 220, and then another muffler 220 is installed into the bracket 210 and abuts against the washer 240; then, a pressure block 230 is pressed into the bracket 210, so that the pressure block 230 abuts against the muffler 220 in the axial direction; then, the pressure block 230 is connected to the bearing seat 310, and the bracket 210 is welded to the bearing seat 310; finally, the valve assembly 300 is connected to the valve body 100.

[0055] 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 by: The device includes a valve assembly (300) and a silencing assembly (200), the silencing assembly (200) being 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 bracket (210), the bracket (210) having a bypass channel (211), and the bypass channel (211) being located on the side wall of the bracket (210). The silencing assembly (200) has a silencing hole (221). The first inlet (312) is connected to the first channel (316), the silencing hole (221), and the bypass channel (211) through the valve port flow channel (311). The flow cross-sectional area of ​​a single bypass channel (211) is larger than the flow cross-sectional area of ​​a single silencing hole (221).

2. The valve device of claim 1, wherein: The silencing assembly (200) further includes at least one silencing part (220), at least one of the silencing parts (220) being positioned within the bracket (210), the silencing part (220) having the silencing hole (221), and along the axial direction of the bracket (210), at least a portion of the bypass channel (211) being located on the side of all the silencing parts (220) near the valve assembly (300).

3. The valve device of claim 2, wherein: Along the axial direction of the bracket (210), the length of the bypass channel (211) is defined as r, and the distance between the center line of the bypass channel (211) and the end face of the silencer (220) near the valve assembly (300) is defined as L, where L≤r / 2.

4. The valve device of claim 3, wherein: The bracket (210) is sealed to the valve assembly (300). Along the axial direction of the bracket (210), the bypass channel (211) is located between the two end faces of the bracket (210), or the bypass channel (211) is recessed from the end of the bracket (210) near the valve assembly (300) toward the direction away from the valve assembly (300).

5. The valve device of claim 4, wherein: The silencing part (220) has a plurality of silencing holes (221), and the total flow cross-sectional area of ​​the bypass channel (211) is smaller than the total flow cross-sectional area of ​​the silencing holes (221); And / or, the silencing assembly (200) includes at least two spaced-apart silencing sections (220), wherein the silencing hole (221) of at least one of the silencing sections (220) is connected to the valve port flow channel (311) through the silencing hole (221) of at least one of the other silencing sections (220), and the spaced-apart silencing sections (220) have a mixing chamber (224) between them, and the mixing chamber (224) is connected to the silencing hole (221).

6. The valve device of claim 5, wherein: The silencing assembly (200) further includes at least one washer (240), with the washer (240) between at least one of the silencing portions (220) and another silencing portion (220), the inner wall of the washer (240) defining at least a portion of the mixing cavity (224).

7. Valve device according to any one of claims 1 to 6, characterized in that: The silencing assembly (200) further includes a pressure block (230), which includes a first limiting part (231) and a second limiting part (232). The first limiting part (231) and the second limiting part (232) are arranged along the axial direction of the pressure block (230). The first limiting part (231) is limitedly connected to the bracket (210), and the second limiting part (232) is limitedly connected to the valve assembly (300). The pressure block (230) also has a second channel (233), which is connected to the first channel (316), the silencing hole (221), and the bypass channel (211).

8. The valve device of claim 7, wherein: The valve assembly (300) further includes a bearing housing (310) having a first inlet (312), a valve port flow channel (311), and a first channel (316). The bracket (210) is sealed to the bearing housing (310). The outer diameter of the first limiting part (231) is greater than or equal to the outer diameter of the second limiting part (232). At least a portion of the first limiting part (231) is located within the bracket (210), and the first limiting part (231) is snap-fitted, threaded, or interference-fitted to the bracket (210). At least a portion of the second limiting part (232) is located within the first channel (316), and the second limiting part (232) is snap-fitted, threaded, or interference-fitted to the bearing housing (310).

9. The valve device of claim 8, wherein: The first limiting part (231) also has a connecting channel (234), the bypass channel (211) and the second channel (233) and at least a portion of the connecting channels (234) are connected, the connecting channel (234) is recessed from the end of the first limiting part (231) away from the second limiting part (232) toward the second limiting part (232), and along the radial direction of the bracket (210), the projection of the bypass channel (211) on the first limiting part (231) falls within the range of the connecting channel (234).

10. The valve device of claim 9, wherein: The first limiting part (231) further includes protrusions (236) spaced circumferentially along the center line of the pressure block (230), the inner diameter of the protrusions (236) defining the second channel (233), the protrusions (236) extending away from the second limiting part (232) along the axial direction of the muffler assembly (200), and the protrusions (236) spaced circumferentially along the muffler assembly (200) having the connecting channel (234) between them, the number of bypass channels (211) being greater than or equal to the number of connecting channels (234); And / or, the bracket (210) includes a third limiting portion (235) located at one end of the bracket (210) away from the valve assembly (300), and the third limiting portion (235) protrudes from the inner wall surface of the bracket (210) toward the centerline of the bracket (210). Along the axial direction of the bracket (210), one end of the silencing portion (220) abuts against the protrusion (236), and the other end of the silencing portion (220) abuts against the third limiting portion (235).

11. An expansion valve characterized by: The expansion valve, comprising any one of claims 1 to 10, further comprises a valve body (100) having a first flow channel (107), a second flow channel (108), and a mounting cavity (110), wherein the valve assembly (300) is sealed to the valve body (100), the first flow channel (107) being able to communicate with the bypass channel (211) through the valve port flow channel (311), the bypass channel (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 a gap being formed between the port of the bypass channel (211) located on the outer wall of the bracket (210) and the inner wall of the valve body (100) along the radial direction of the mounting cavity (110).

12. The expansion valve of claim 11, wherein: 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 defining the first expansion section (111). The second expansion section (113) is located at one end of the limiting section (112) near the second flow channel (108). At the end, the bearing housing (310) is sealed to the wall portion defining the limiting section (112), and the valve body (100) defines a gap between the inner wall portion of the second expanding section (113) and the port of the bypass channel (211) located on the outer wall portion of the bracket (210), the flow cross-section of the gap being larger than the flow cross-sectional area of ​​the silencing hole (221), and the port of the bypass channel (211) located on the outer wall portion of the bracket (210) communicating with the second flow channel (108).

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