valve terminal

Abstract

The utility model relates to a valve island, apply to car massage seat, include: valve body, its inside have the flow passage for gas circulation and the accommodating cavity and the pressure stabilization chamber that open in communication at its both sides and opposite setting, accommodating cavity has an air inlet end, flow passage has at least one air outlet end, pressure stabilization valve, including pressure stabilization valve stem and the pressure feedback part fixed at its end, pressure stabilization valve stem penetrates flow passage to pressure stabilization chamber and accommodating cavity along the axial direction, inside open flow passage, accommodating cavity and pressure stabilization chamber, pressure stabilization valve installs in accommodating cavity and pressure stabilization chamber, flow passage for gas circulation, at least one pressure relief valve is installed in valve body simultaneously, replaces connecting pipeline and joint through flow passage, in this way reduces assembly complexity, also reduces leakage point, improves the air tightness of valve island long -term operation, and compared with traditional valve island, flow passage replaces connecting pipeline, also make the volume of valve island reduce, more favorably arrange in the narrow space of vehicle.

Description

Technical Field

[0001] This utility model relates to the field of automotive massage seat technology, and in particular to a valve island. Background Technology

[0002] With the continuous improvement of automotive intelligence and comfort, pneumatic massage functions for seats have gradually become popular in mid-to-high-end models and are penetrating into a wider range of vehicles. Current mainstream solutions mostly adopt an independent air supply mode, with each car seat consisting of three main parts: an air pump, a control valve assembly, and airbags. The air pump generates compressed gas, which, after pressure regulation and control by the valve assembly, is delivered to multiple airbags built into the seat as needed. The massage action is achieved through the inflation and deflation circulation of the airbags.

[0003] However, in the independent air supply mode, the cost and overall vehicle weight increase because each seat has an air pump. Moreover, the noise from multiple pumps working in the cabin is superimposed, resulting in a large amount of noise inside the vehicle. Therefore, a centralized air supply mode has emerged, in which multiple seats use a high-performance air pump for unified air supply, and then the valve island distributes the air pressure to the airbags in multiple seats.

[0004] However, traditional valve islands generally adopt a combination of components, that is, connecting independent pressure regulating valves, pressure relief valves, etc. into modular valve islands through pipelines and connectors. Because the valve islands formed by connecting multiple valve bodies and pipelines are large in size, they are not conducive to the arrangement in the small space inside the vehicle. Moreover, the numerous pipelines and connectors not only increase the assembly complexity, but also the large number of connectors constitute potential leakage points, affecting the long-term airtightness of the system. Utility Model Content

[0005] Therefore, it is necessary to address the issues of numerous connecting pipes and joints and large size in traditional modular valve islands by providing a valve island that integrates multiple valve bodies into a single valve body, thereby reducing the number of connecting pipes and joints.

[0006] A valve island, used in a car massage seat, includes: The valve body has a flow channel for gas flow and a receiving cavity and a pressure stabilizing cavity that are opened on both sides of it and are arranged opposite each other. The receiving cavity has an air inlet end and the flow channel has at least one air outlet end. A pressure regulating valve includes a pressure regulating valve stem and a pressure feedback part fixed to its end. The pressure regulating valve stem extends axially through the flow channel to the pressure regulating chamber and the receiving chamber. The pressure feedback part is slidably connected to the pressure regulating chamber by an elastic element. The outer periphery of the pressure feedback part seals against the inner wall of the pressure regulating chamber to form a sealed chamber communicating with the flow channel. The pressure regulating valve stem has a throttling part. The position where the receiving chamber communicates with the flow channel forms a throttling channel. The throttling part moves axially with the pressure feedback part and cooperates with the inner wall of the throttling channel to change the gas flow area of ​​the throttling channel. At least one pressure relief valve is fixed to the valve body and communicates with the flow channel. The pressure relief valve is located downstream of the pressure stabilizing valve along the gas flow path. When the pressure in the flow channel is greater than the pressure relief threshold of the pressure relief valve, the pressure relief valve opens and releases pressure.

[0007] In one embodiment, a throttling cavity is provided between the receiving cavity and the flow channel. The diameter of the throttling cavity is smaller than the diameter of the receiving cavity and larger than the diameter of the pressure regulating valve stem. The throttling channel is the throttling cavity. The throttling section is conical and part of it is located in the receiving cavity, while the other part is located in the throttling cavity. The distance between the outer periphery of the throttling section and the inner wall of the throttling cavity changes with the axial movement of the pressure regulating valve stem.

[0008] In one embodiment, the pressure regulating valve further includes a plugging block, which is sleeved and fixed to the pressure regulating valve stem, and the plugging block can undergo elastic deformation in the radial direction; The throttling section is the blocking block.

[0009] In one embodiment, the flow channel extends radially through the throttling cavity to communicate with it. An overflow cavity is provided between the throttling cavity and the pressure stabilizing cavity. The diameter of the overflow cavity is larger than the diameter of the pressure stabilizing valve stem and smaller than the diameter of the pressure stabilizing cavity. The pressure stabilizing valve stem passes through the overflow cavity, and the air pressure in the flow channel acts on the pressure feedback unit through the overflow cavity.

[0010] In one embodiment, at least one damping hole is provided between the flow channel and the pressure stabilizing chamber, and the air pressure in the flow channel acts on the pressure feedback unit through the damping hole.

[0011] In one embodiment, the damping orifice is configured as two and symmetrically distributed on both sides of the pressure regulating valve stem along the radial direction.

[0012] In one embodiment, the pressure regulating valve further includes a piston detachably fixed to the end of the pressure regulating valve stem, the piston being slidably connected to the pressure regulating chamber along the axial direction, and the outer periphery of the piston abutting against the inner wall of the pressure regulating chamber; The pressure feedback unit is the piston.

[0013] In one embodiment, the pressure regulating valve further includes a first valve seat and a first spring. The first valve seat is located on the side of the piston away from the receiving cavity. The outer periphery of the first valve seat is provided with external threads. The end of the pressure regulating cavity away from the receiving cavity is open, and its inner wall is provided with internal threads. The first valve seat is threadedly connected to the pressure regulating cavity. The first valve seat has an adjustment groove recessed in the direction away from the receiving cavity on one side near the receiving cavity. A first spring seat is axially slidably connected in the adjustment groove. A threaded rod is fixed on the side of the first spring seat away from the receiving cavity, which passes through the side wall of the adjustment groove away from the receiving cavity in the axial direction. A through hole is opened in the threaded rod to connect the pressure stabilizing cavity with the outside. The elastic element is the first spring, which is located between the piston and the first spring seat, with one end abutting against the piston and the other end abutting against the first spring seat.

[0014] In one embodiment, the pressure regulating valve further includes a second valve seat, the receiving cavity is open at one end away from the pressure regulating cavity and its inner wall is provided with internal threads, the outer periphery of the second valve seat is provided with external threads, and the second valve seat is threadedly connected to one end of the opening of the receiving cavity; The second valve seat has a guide groove recessed in the direction away from the pressure stabilizing chamber on one side near the pressure stabilizing chamber, and a guide shaft that is slidably connected to the guide groove is fixed at one end of the pressure stabilizing valve stem near the second valve seat.

[0015] In one embodiment, two pressure relief valves are configured and both are fixed to the valve body, and the two pressure relief valves are connected in series in the flow channel; One of the two pressure relief valves is provided with a first pressure relief threshold, and the other is provided with a second pressure relief threshold, wherein the first pressure relief threshold is greater than the second pressure relief threshold.

[0016] The aforementioned valve island has internal flow channels, receiving chambers, and pressure stabilizing chambers. The pressure stabilizing valve is installed in the receiving chamber and the pressure stabilizing chamber. The flow channels allow gas to flow through, and at least one pressure relief valve is installed in the valve body. By replacing connecting pipes and joints with flow channels, the assembly complexity is reduced, the number of leakage points is reduced, and the airtightness of the valve island during long-term operation is improved. Moreover, compared with traditional valve islands, the flow channels replace connecting pipes, which also reduces the size of the valve island and makes it easier to arrange in the confined space of a vehicle. Attached Figure Description

[0017] Figure 1 A schematic diagram of a valve island provided in this application; Figure 2 A front view of a valve island provided in this application; Figure 3 For this application Figure 2 A partial sectional view along the AA direction; Figure 4 For this application Figure 2 Cross-sectional view along the BB direction; Figure 5 For this application Figure 2 A cross-sectional view along the CC direction; Figure 6 This application provides a schematic diagram of the structure of a pressure regulating valve in a valve island; Figure 7 For this application Figure 6 Enlarged view of point D; Figure 8 For this application Figure 6 Enlarged view of point E in the middle; Figure 9 This is a schematic diagram of the structure of a pressure relief valve in a valve island provided in this application.

[0018] Explanation of reference numerals in the attached figures: 1. Valve body; 11. Receiving cavity; 12. Pressure regulating cavity; 13. Flow channel; 131. First air inlet section; 132. Second air inlet section; 133. Main flow section; 134. Flow branch section; 135. First air outlet section; 136. Second air outlet section; 137. Third air outlet section; 14. Throttling cavity; 15. Damping orifice; 16. Overflow cavity; 17. Pressure relief cavity; 18. Pressure relief port; 2. Pressure regulating valve; 21. Pressure regulating valve stem; 211. Threaded shaft; 212. Stepped surface; 213. Guide shaft; 214. Pressure balance groove; 215. Pressure balance hole; 216. Protrusion; 217. Second spring seat; 218. 1. Limiting part; 22. Piston; 221. Sealing groove; 222. First sealing ring; 223. First spring plate; 23. First valve seat; 231. Adjusting groove; 232. First spring seat; 233. Threaded rod; 2331. Through hole; 25. First spring; 26. Sealing block; 27. Second valve seat; 271. Guide groove; 28. Second spring; 3. Pressure relief valve; 31. Pressure relief valve stem; 32. Third valve seat; 33. Second sealing ring; 34. Third spring; 341. Pressure relief shaft; 3411. Pressure relief groove; 3412. Pressure relief hole; 4. Air outlet; 5. Air inlet; 6. Steel ball. Detailed Implementation

[0019] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0025] See Figures 1-5 An embodiment of this utility model provides a valve island for use in an automotive massage seat, comprising: a valve body 1, a pressure regulating valve 2, and at least one pressure relief valve 3; the valve body 1 has a flow channel 13 for gas flow and a receiving cavity 11 and a pressure regulating cavity 12 connected on both sides of the valve body and disposed opposite to each other, the receiving cavity 11 having an air inlet end, and the flow channel 13 having at least one air outlet end; the pressure regulating valve 2 includes a pressure regulating valve stem 21 and a pressure feedback part fixed to its end, the pressure regulating valve stem 21 axially penetrating the flow channel 13 to the pressure regulating cavity 12 and the receiving cavity 11, and the pressure feedback part being slidably connected by an elastic element. The pressure feedback part is connected to the pressure stabilizing chamber 12. The outer periphery of the pressure feedback part is sealed against the inner wall of the pressure stabilizing chamber 12 to form a sealed chamber that communicates with the flow channel 13. The pressure stabilizing valve stem 21 has a throttling part. The position where the receiving chamber 11 communicates with the flow channel 13 forms a throttling channel. The throttling part moves axially with the pressure feedback part and cooperates with the inner wall of the throttling channel to change the gas flow area of ​​the throttling channel. The pressure relief valve 3 is connected to the flow channel 13. The pressure relief valve is located downstream of the pressure stabilizing valve 2 along the gas flow path. When the pressure in the flow channel 13 is greater than the pressure relief threshold of the pressure relief valve 3, the pressure relief valve 3 opens and relieves pressure.

[0026] Specifically, in this embodiment, the flow channel 13 has four air outlets, and each air outlet has a fixed air outlet 4. The air outlet 4 is connected to the control valve group in each seat through a hose, so as to input the gas from the air source into the control valve group. The control valve group controls the inflation and deflation of each airbag, thereby realizing the massage action.

[0027] Accordingly, the flow channel 13 includes a first intake section 131, a second intake section 132, a main flow section 133, a branch section 134, a first outlet section 135, a second outlet section 136, and a third outlet section 137; for ease of explanation, ... Figure 1 Taking the perspective of the valve body 1 as an example, the side with the air outlet 4 fixed on it is defined as the front face, the side opposite to the front face is the rear face, the side above the front face is the upper face, and the other faces are defined in the same way.

[0028] Specifically, the first intake section 131 is perpendicular to the front end face of the valve body 1 and has an open front end. An intake port 5 is fixed on the valve body 1, located inside the front end of the first intake section 131. The intake port 5 is connected to an air source via a pipe. The second intake section 132 is perpendicular to the rear end of the first intake section 131. The second intake section 132 is perpendicular to the right end face of the valve body 1, has an open right end, and its left end connects to the receiving cavity 11, serving as the intake end of the receiving cavity 11. The main flow section 133 is perpendicular to the right end face of the valve body 1 and is not at the same height as the second intake section 132. The main flow section 133 has an open right end, and its left end connects to the branch section 134. The outlet of the receiving cavity 11 connects to the main flow section 133. The branch section 134... 4. Perpendicular to the front end face of valve body 1, the front end of the diversion section 134 is open. There are two first air outlet sections 135, both perpendicular to the left end face of valve body 1, with their left ends open and their right ends connected to the diversion section 134. There are four second air outlet sections 136, all perpendicular to the lower end face of valve body 1, with their upper ends open. Every two second air outlet sections 136 form a group, and the two groups of second air outlet sections 136 respectively penetrate the first air outlet section 135 perpendicularly and are connected to it. There are four third air outlet sections 137, all perpendicular to the front end face of valve body 1, with their front ends open. The rear end of each third air outlet section 137 is connected to the lower end of the four second air outlet sections 136. The four air outlet ports 4 are respectively installed at the front ends of the four third air outlet sections 137.

[0029] This configuration allows all flow channels 13 in the valve body 1 to be formed by drilling on a lathe, which facilitates the machining of the flow channels 13. Except for the ports with outlet ports 4 and inlet ports 5, all ports of the flow channels 13 located on the surface of the valve body 1 can be fitted with steel balls 6 to seal the ports of the flow channels 13, thereby allowing gas to enter from the inlet port 5, pass through the flow channels 13, and be discharged from the four outlet ports 4.

[0030] It should be noted that the steel ball 6 is pressed into the port of the flow channel 13 by a press, and the steel ball 6 is pressurized to the inner wall of the flow channel 13. In addition to using the steel ball 6 for sealing, sealing screws or rubber sealing pins can also be used for sealing.

[0031] Existing valve islands mostly adopt a discrete component combination method, that is, connecting independent pressure regulating valves, pressure relief valves and multiple solenoid valves into a modular valve island through pipelines and connectors. Since the valve island formed by connecting multiple valve bodies and pipelines is large in size, it is not conducive to the arrangement in the small space inside the vehicle. Moreover, the numerous pipelines and connectors not only increase the assembly complexity, but also the large number of connectors constitute potential leakage points, affecting the long-term airtightness of the system.

[0032] The valve island provided in this application adopts an integrated valve body 1 with an internal flow channel 13 for gas flow. The pressure regulating valve 2 and the pressure relief valve 3 are installed in the valve body 1 and are connected to the flow channel 13. The flow channel 13 replaces the pipeline connection of the traditional valve island, reducing the number of joints and pipeline connections, thereby reducing the number of leakage points of the valve island and improving the airtightness and stability of the valve island during long-term use. At the same time, the integrated installation of the pressure regulating valve 2 and the pressure relief valve 3 in the valve body 1 and the use of the flow channel instead of the pipeline also reduces the volume of the valve island, which is more conducive to the arrangement in the small space inside the vehicle.

[0033] In centralized air supply mode, the air pump is mainly driven by the vehicle engine or vehicle power supply. Therefore, when the air pump starts, its output air pressure is relatively large. When going uphill or accelerating, the vehicle's power output increases, which leads to an increase in the pressure output by the air pump. If this sudden increase in air pressure is directly input into the airbag without being stabilized, it can easily cause the airbag to explode.

[0034] Therefore, the pressure regulating valve 2 installed in the valve island can control the air pressure output from the valve island within a safe range. The main process is as follows: the pressure in the main flow section 133 of the flow channel 13 acts on the pressure feedback part, and with the elastic force of the elastic element, when the thrust of the pressure in the main flow section 133 acting on the pressure feedback part is greater than the elastic force of the elastic element, the pressure feedback part moves in the direction of the air pressure thrust in the main flow section 133, and the throttling part moves accordingly, thereby reducing the gas flow area between the throttling part and the throttling channel, and thus reducing the flow rate of gas entering the main flow section 133; when the air pressure thrust in the main flow section 133 decreases to less than the elastic force of the elastic element, the pressure feedback part moves in the direction of the elastic force of the elastic element, and the gas flow area between the throttling part and the throttling channel increases, and the air pressure in the main flow section 133 increases again. This process repeats to ensure that the air pressure in the main flow section 133 is always maintained within a certain range. This air pressure range can be adjusted by adjusting the initial elastic force of the elastic element, thereby ensuring that the gas pressure output from the valve island is stable within a safe range.

[0035] See Figure 6 Furthermore, a throttling cavity 14 is provided between the receiving cavity 11 and the flow channel 13. The diameter of the throttling cavity 14 is smaller than the diameter of the receiving cavity 11 and larger than the diameter of the pressure regulating valve stem 21. The throttling channel is the throttling cavity 14. The main flow section 133 in the flow channel 13 passes through the throttling cavity 14 radially so that the main flow section 133 is connected to the throttling cavity 14. Gas enters the receiving cavity 11 through the first intake section 131 and the second intake section 132, and then enters the main flow section 133 from the receiving cavity 11 through the throttling cavity 14. The throttling part is conical and part of it is located in the receiving cavity 11, and the other part is located in the throttling cavity 14. The distance between the outer periphery of the throttling part and the inner wall of the throttling cavity 14 changes with the axial movement of the pressure regulating valve stem 21.

[0036] The throttling cavity 14, combined with the conical throttling section, is conducive to controlling the gas flow area of ​​the throttling channel. The minimum diameter of the throttling section is smaller than the inner diameter of the throttling cavity 14, and the maximum diameter of the throttling section is larger than the inner diameter of the throttling cavity 14, so that when the axial movement of the throttling section is too large, the throttling section can directly block the throttling cavity 14.

[0037] In some embodiments, the pressure stabilizing chamber 12 is directly connected to the main flow section 133, and the throttling channel is the outlet of the pressure stabilizing chamber 12. The throttling part is disposed in the pressure stabilizing chamber 12, and the distance between the throttling part and the outlet of the pressure stabilizing chamber 12 can be adjusted by the axial movement of the throttling part.

[0038] In another embodiment, the pressure stabilizing chamber 12 is directly connected to the main flow section 133, and the throttling channel is the air inlet of the main flow section 133. The throttling part is disposed in the main flow section 133, and the distance between the throttling part and the air inlet of the main flow section 133 can be adjusted by the axial movement of the throttling part.

[0039] Furthermore, the pressure regulating valve 2 also includes a blocking block 26, which is sleeved and fixed to the pressure regulating valve stem 21. The blocking block 26 can undergo elastic deformation in the radial direction; the throttling part is the blocking block 26.

[0040] In this embodiment, the sealing block 26 is made of rubber. When the pressure inside the input valve island is too high, the sealing block 26 may directly abut against the inner wall of the throttling channel, thus closing the throttling channel. The rubber sealing block 26 not only increases the airtightness of the throttling channel when it is closed, preventing air leakage and affecting the feedback speed of the pressure feedback unit, but also the elastic deformation of the sealing block 26 can prevent rigid contact with the throttling channel, thereby ensuring the integrity of the long-term movement of the throttling channel and preventing deformation of the throttling channel from affecting the pressure regulation accuracy of the subsequent pressure regulating valve.

[0041] See Figure 7 Specifically, a conical protrusion 216 is fixed around the outer periphery of the pressure regulating valve stem 21, and the sealing block 26 is covered and fixed on the protrusion 216, thereby increasing the connection strength and stability between the sealing block 26 and the pressure regulating valve stem 21.

[0042] In another embodiment, the throttling part can also be a protrusion 216, and the change in the distance between the outer peripheral surface of the protrusion 216 and the inner wall of the throttling channel can adjust the flow rate of the airflow through the throttling channel.

[0043] Furthermore, the flow channel 13 radially penetrates the throttling cavity 14 so that the flow channel 13 and the throttling cavity 14 are connected. An overflow cavity 16 is provided between the throttling cavity 14 and the pressure stabilizing cavity 12. The diameter of the overflow cavity 16 is larger than the diameter of the pressure stabilizing valve stem 21 and smaller than the diameter of the pressure stabilizing cavity 12. The pressure stabilizing valve stem 21 penetrates the overflow cavity 16, and the air pressure in the flow channel 13 acts on the pressure feedback unit through the overflow cavity 16.

[0044] The overflow chamber 16 reduces the contact between the outer periphery of the pressure regulating valve stem 21 and the valve body 1, preventing wear caused by friction between the pressure regulating valve stem 21 and the valve body 1. This ensures that the gap between the overflow chamber 16 and the pressure regulating valve stem 21 remains consistent, thereby ensuring the feedback accuracy of the pressure feedback unit.

[0045] To facilitate understanding, let's take an existing pressure regulating valve as an example. Existing pressure regulating valves primarily use a diaphragm to feedback the pressure within the valve body. When the pressure changes excessively, the diaphragm deforms, driving the valve stem to move axially, thereby controlling the opening and closing of the valve core and ultimately keeping the pressure within the valve body within a safe range. However, because the diaphragm and valve stem are in contact rather than integrated, the movement path of the valve stem is mainly restricted by holes in the valve body. This means the valve stem is guided by the holes in the valve body. Over time, this leads to wear due to friction between the valve stem and the hole wall, resulting in an increase in the hole diameter or a larger gap between the valve stem and the hole wall. Consequently, when the diaphragm provides pressure feedback, some gas leaks through the gap between the valve stem and the hole wall, affecting the diaphragm's pressure feedback accuracy.

[0046] Therefore, this utility model uses a pressure feedback unit fixed to the pressure regulating valve stem 21. The movement of the pressure feedback unit drives the movement of the pressure regulating valve stem 21. At the same time, the overflow chamber 16 avoids wear between the pressure regulating valve stem 21 and the valve body 1. The gap between the inner wall of the overflow chamber 16 and the pressure regulating valve stem 21 remains unchanged during the long-term movement of the pressure regulating valve stem 21. Therefore, the pressure error leaking through the overflow chamber 16 can be added to the pressure feedback accuracy when the valve island leaves the factory, thereby ensuring the pressure control accuracy of the pressure regulating valve 2 in the valve island.

[0047] Furthermore, at least one damping hole 15 is provided between the flow channel 13 and the pressure stabilizing chamber 12, and the air pressure in the flow channel 13 acts on the pressure feedback unit through the damping hole 15.

[0048] The opening of the damping orifice 15 increases the communication area between the flow channel 13 and the pressure stabilizing chamber 12, increases the gas flow efficiency between the flow channel 13 and the pressure stabilizing chamber 12, improves the pressure feedback speed of the pressure feedback unit, and thus improves the pressure control response speed of the pressure stabilizing valve 2.

[0049] Furthermore, there are two damping orifices 15, which are symmetrically distributed on both sides of the pressure regulating valve stem 21 along the radial direction.

[0050] This configuration ensures that the thrust exerted by the flow channel 13 on the pressure feedback section through the two damping holes 15 is symmetrical and uniform, thereby ensuring that the pressure feedback section can move smoothly in the axial direction and reducing the friction between the pressure feedback section and the inner wall of the pressure stabilizing chamber 12.

[0051] Furthermore, the pressure regulating valve 2 also includes a piston 22 detachably fixed to the end of the pressure regulating valve stem 21. The piston 22 is axially slidably connected to the pressure regulating chamber 12, and the outer periphery of the piston 22 abuts against the inner wall of the pressure regulating chamber 12. The pressure feedback part is the piston 22.

[0052] Compared to the diaphragm in a traditional pressure regulating valve, the piston 22 moves more smoothly in the axial direction. In order to increase the sealing between the piston 22 and the inner wall of the pressure regulating chamber 12, at least one sealing ring can be added between the outer circumference of the piston 22 and the inner wall of the pressure regulating chamber 12, preferably two sealing rings, which can increase the stability of the axial movement of the piston 22.

[0053] See Figure 8 Furthermore, a threaded shaft 211 is fixed at the end of the pressure regulating valve stem 21 away from the receiving cavity 11. The threaded shaft 211 is threaded to the piston 22 along the axis of the piston 22. A sealing groove 221 is formed by recessing the piston 22 on the side near the receiving cavity 11 and moving away from the receiving cavity 11. A first sealing ring 222 is fitted between the inner wall of the sealing groove 221 and the outer circumference of the threaded shaft 211.

[0054] This design allows the pressure regulating valve stem 21 and piston 22 to be detachable, which facilitates the assembly of the pressure regulating valve 2 within the valve body 1. The first sealing ring 222 increases the sealing between the threaded shaft 211 and piston 22, preventing gas leakage from the thread gap between the threaded shaft 211 and piston 22, and ensuring the accuracy of pressure feedback.

[0055] Furthermore, a stepped surface 212 is formed between the threaded shaft 211 and the pressure regulating valve stem 21. A first spring plate 223 is sleeved on the threaded shaft 211. The side of the first spring plate 223 near the receiving cavity 11 abuts against the stepped surface 212, and the other side of the first spring plate 223 away from the receiving cavity 11 abuts against the piston 22, so that the first spring plate 223 squeezes the piston 22 away from the receiving cavity 11.

[0056] The first spring plate 223 provides thrust to the piston 22 along the axial direction of the pressure regulating valve rod 21, thereby increasing the threaded connection strength between the piston 22 and the threaded shaft 211 and ensuring the stability of the piston 22 and the pressure regulating valve rod 21 during long-term movement.

[0057] See Figure 6Furthermore, the pressure regulating valve 2 also includes a first valve seat 23 and a first spring 25. The first valve seat 23 is located on the side of the piston 22 away from the receiving cavity 11. The outer periphery of the first valve seat 23 is provided with external threads. The end of the pressure regulating cavity 12 away from the receiving cavity 11 is open, and its inner wall is provided with internal threads. The first valve seat 23 is threadedly connected to the pressure regulating cavity 12. The side of the first valve seat 23 near the receiving cavity 11 is provided with an adjusting groove 231 that is recessed in the direction away from the receiving cavity 11. The adjusting groove 231 is axially slidably connected with a first spring seat 232. The side of the first spring seat 232 away from the receiving cavity 11 is fixed with a threaded rod 233 that passes through the side wall of the adjusting groove 231 away from the receiving cavity 11 along the axis. The threaded rod 233 is provided with a through hole 2331 that connects the pressure regulating cavity 12 to the outside. The elastic element is the first spring 25. The first spring 25 is located between the piston 22 and the first spring seat 232, with one end abutting against the piston 22 and the other end abutting against the first spring seat 232.

[0058] By rotating the threaded rod 233, the first spring seat 232 can be moved axially, thereby changing the distance between the first spring seat 232 and the piston 22, and thus adjusting the compression of the first spring 25. This changes the elastic force that the first spring 25 exerts on the piston 22 in its initial position, thereby adjusting the pressure feedback value of the piston 22 on the flow channel 13, and thus adjusting the pressure control range of the pressure regulating valve 2. For example, to maintain the air pressure in the main flow section 133 at about 1 bar, the elastic force of the first spring 25 is adjusted so that it is equivalent to the thrust of the piston 22 when the air pressure in the main flow section 133 is 1 bar. When the input air pressure is greater than 1 bar, the piston 22 moves in the direction of compression of the first spring 25, thereby reducing the gas flow area of ​​the throttling chamber 14, reducing the air pressure entering the main flow section 133, and then the piston 22 returns to its original position. This process is repeated to control the air pressure in the main flow section 133 at about 1 bar.

[0059] The through hole 2331 ensures that the air pressure between the piston 22 and the first valve seat 23 remains stable at atmospheric pressure when the piston 22 moves axially, thus preventing changes in air pressure between the piston 22 and the first valve seat 23 due to the movement of the piston 22, which would affect the pressure feedback of the piston 22.

[0060] In some embodiments, in addition to the first spring 25 described above, the elastic element may also be an air bladder, which is disposed between the piston 22 and the first spring seat 232. The axial movement of the piston 22 can also be achieved by the elastic force of the air bladder.

[0061] See Figure 6Furthermore, the pressure regulating valve 2 also includes a second valve seat 27. The receiving cavity 11 is open at one end away from the pressure regulating cavity 12, and its inner wall is provided with internal threads. The outer periphery of the second valve seat 27 is provided with external threads. The second valve seat 27 is threadedly connected to one end of the opening of the receiving cavity 11. The side of the second valve seat 27 near the pressure regulating cavity 12 is provided with a guide groove 271 that is recessed in the direction away from the pressure regulating cavity 12. The end of the pressure regulating valve stem 21 near the second valve seat 27 is fixed with a guide shaft 213 that is slidably connected to the guide groove 271.

[0062] The sliding fit between the guide shaft 213 and the guide groove 271 can improve the stability of the axial movement of the pressure regulating valve stem 21.

[0063] Furthermore, a limiting portion 218 extending radially outward is fixed around the outer periphery of the pressure regulating valve stem 21. The diameter of the limiting portion 218 is larger than the inner diameter of the guide groove 271, so that the limiting portion 218 can abut against the second valve seat 27, thereby positioning the pressure regulating valve stem 21. The end of the limiting portion 218 away from the second valve seat 27 extends radially outward to form a second spring seat 217 surrounding the limiting portion 218. A second spring 28 is fixed between the second spring seat 217 and the second valve seat 27. The tension of the second spring 28 can accelerate the reset of the pressure regulating valve stem 21.

[0064] Furthermore, a pressure balancing groove 214 is provided in the pressure stabilizing valve stem 21 along the axial direction. The end of the pressure balancing groove 214 away from the pressure stabilizing chamber 12 is open and communicates with the guide groove 271. A pressure balancing hole 215 is provided in the radial direction through the peripheral wall of the pressure balancing groove 214, which communicates with the throttling channel. The arrangement of the pressure balancing hole 215 and the pressure balancing groove 214 ensures that the pressure in the guide groove 271 is always balanced with the pressure in the receiving chamber 11, so that the guide shaft 213 slides smoothly in the guide groove 271.

[0065] See Figure 4 Furthermore, there are two pressure relief valves 3, both of which are fixed to the valve body 1, and the two pressure relief valves 3 are connected in series in the flow channel 13; wherein, one of the two pressure relief valves 3 is provided with a first pressure relief threshold and the other is provided with a second pressure relief threshold, and the first pressure relief threshold is greater than the second pressure relief threshold.

[0066] With this configuration, the two pressure relief valves 3 can still relieve pressure if one fails, thus improving the safety of the valve island. The setting of the first pressure relief threshold and the second pressure relief threshold can prevent the two pressure relief valves 3 from opening at the same time, thus avoiding excessive pressure leakage during pressure relief.

[0067] See Figure 9Specifically, the valve body 1 has two pressure relief chambers 17, and the pressure relief chambers 17 are connected to the flow channel 13 by a pressure relief port 18. The diameter of the pressure relief port 18 is smaller than that of the pressure relief chamber 17. The pressure relief valve 3 includes a pressure relief valve stem 31 and a third valve seat 32. The pressure relief chamber 17 is open at one end away from the flow channel, and its inner wall is provided with internal threads. The third valve seat 32 is provided with external threads on its outer periphery and is threaded to the pressure relief chamber 17. A second sealing ring 33 is fitted and fixed on the pressure relief valve stem 31 and abuts against the air outlet of the pressure relief port 18. A third spring 34 is fixed between the pressure relief valve stem 31 and the third valve seat 32. The compression of the third spring 34 increases or decreases as the third valve seat 32 rotates.

[0068] By rotating the third valve seat 32, the compression of the third spring 34 can be adjusted, thereby adjusting the pressure when the pressure relief valve stem 31 is opened, and thus adjusting the pressure relief threshold of the pressure relief valve 3.

[0069] Furthermore, a pressure relief shaft 341 is fixed on the pressure relief valve stem 31, which passes through the third valve seat 32 axially. A pressure relief groove 3411 is provided inside the pressure relief shaft 341. The end of the pressure relief groove 3411 away from the flow channel is open. A pressure relief hole 3412 is provided radially through the peripheral wall of the pressure relief groove 3411. The pressure relief hole 3412 connects the pressure relief groove 3411 and the pressure relief chamber 17.

[0070] When the pressure relief valve stem 31 is pushed axially away from the pressure relief port 18 by the high pressure in the flow channel 13, the pressure relief port 18 opens, the air pressure in the flow channel 13 is released through the pressure relief port 18, and the gas is discharged through the pressure relief hole 3412 and the pressure relief groove 3411.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A valve island, used in a car massage seat, characterized in that, include: The valve body (1) has a flow channel (13) for gas flow and a receiving cavity (11) and a pressure stabilizing cavity (12) connected on both sides of the valve body and arranged opposite to each other. The receiving cavity (11) has an air inlet end and the flow channel (13) has at least one air outlet end. The pressure regulating valve (2) includes a pressure regulating valve stem (21) and a pressure feedback part fixed to its end. The pressure regulating valve stem (21) passes through the flow channel (13) axially to the pressure regulating chamber (12) and the receiving chamber (11). The pressure feedback part is slidably connected to the pressure regulating chamber (12) through an elastic element. The outer periphery of the pressure feedback part is sealed against the inner wall of the pressure regulating chamber (12) to form a sealed chamber communicating with the flow channel (13). The pressure regulating valve stem (21) has a throttling part. The communication position between the receiving chamber (11) and the flow channel (13) forms a throttling channel. The throttling part moves axially with the pressure feedback part and cooperates with the inner wall of the throttling channel to change the gas flow area of ​​the throttling channel. At least one pressure relief valve (3) is fixed to the valve body (1) and communicates with the flow channel (13). The pressure relief valve (3) is located downstream of the pressure stabilizing valve (2) along the gas flow path. When the pressure in the flow channel (13) is greater than the pressure relief threshold of the pressure relief valve (3), the pressure relief valve (3) opens and relieves pressure.

2. The valve island according to claim 1, characterized in that, A throttling cavity (14) is provided between the receiving cavity (11) and the flow channel (13). The diameter of the throttling cavity (14) is smaller than the diameter of the receiving cavity (11) and larger than the diameter of the pressure regulating valve stem (21). The throttling channel is the throttling cavity (14). The throttling section is conical and part of it is located in the receiving cavity (11), while the other part is located in the throttling cavity (14). The distance between the outer periphery of the throttling section and the inner wall of the throttling cavity (14) varies with the axial movement of the pressure regulating valve stem (21).

3. The valve island according to claim 2, characterized in that, The pressure regulating valve (2) also includes a sealing block (26), which is sleeved and fixed to the pressure regulating valve stem (21). The sealing block (26) can undergo elastic deformation in the radial direction. The throttling section is the blocking block (26).

4. The valve island according to claim 2, characterized in that, The flow channel (13) radially penetrates the throttling cavity (14) so ​​that the flow channel (13) and the throttling cavity (14) are connected. An overflow cavity (16) is provided between the throttling cavity (14) and the pressure stabilizing cavity (12). The diameter of the overflow cavity (16) is larger than the diameter of the pressure stabilizing valve stem (21) and smaller than the diameter of the pressure stabilizing cavity (12). The pressure stabilizing valve stem (21) penetrates the overflow cavity (16). The air pressure in the flow channel (13) acts on the pressure feedback unit through the overflow cavity (16).

5. The valve island according to any one of claims 1 or 4, characterized in that, At least one damping hole (15) is provided between the flow channel (13) and the pressure stabilizing chamber (12), and the air pressure in the flow channel (13) acts on the pressure feedback unit through the damping hole (15).

6. The valve island according to claim 5, characterized in that, Two damping holes (15) are configured and symmetrically distributed on both sides of the pressure regulating valve stem (21) along the radial direction.

7. The valve island according to claim 1, characterized in that, The pressure regulating valve (2) further includes a piston (22) detachably fixed to the end of the pressure regulating valve stem (21), the piston (22) being slidably connected to the pressure regulating chamber (12) along the axial direction, and the outer periphery of the piston (22) abutting against the inner wall of the pressure regulating chamber (12); The pressure feedback unit is the piston (22).

8. The valve island according to claim 7, characterized in that, The pressure regulating valve (2) further includes a first valve seat (23) and a first spring (25). The first valve seat (23) is located on the side of the piston (22) away from the receiving cavity (11). The outer periphery of the first valve seat (23) is provided with external threads. The pressure regulating cavity (12) is open at one end away from the receiving cavity (11), and its inner wall is provided with internal threads. The first valve seat (23) is threadedly connected to the pressure regulating cavity (12). The first valve seat (23) has an adjustment groove (231) recessed in the direction away from the receiving cavity (11) on one side near the receiving cavity (11). A first spring seat (232) is axially slidably connected in the adjustment groove (231). A threaded rod (233) is fixed on the side of the first spring seat (232) away from the receiving cavity (11) and passes through the side wall of the adjustment groove (231) away from the receiving cavity (11) along the axis. A through hole (2331) is opened in the threaded rod (233) to connect the pressure stabilizing cavity (12) with the outside. The elastic element is the first spring (25), which is located between the piston (22) and the first spring seat (232), with one end abutting against the piston (22) and the other end abutting against the first spring seat (232).

9. The valve island according to claim 1, characterized in that, The pressure regulating valve (2) also includes a second valve seat (27). The receiving cavity (11) is opened at one end away from the pressure regulating cavity (12), and its inner wall is provided with internal threads. The second valve seat (27) is provided with external threads on its outer periphery. The second valve seat (27) is threadedly connected to one end of the opening of the receiving cavity (11). The second valve seat (27) has a guide groove (271) recessed in the direction away from the pressure stabilizing chamber (12) on one side near the pressure stabilizing chamber (12), and the pressure stabilizing valve stem (21) has a guide shaft (213) fixedly connected to the guide groove (271) at one end near the second valve seat (27).

10. The valve island according to claim 1, characterized in that, The pressure relief valve (3) is configured as two and both are fixed to the valve body (1), and the two pressure relief valves (3) are connected in series in the flow channel (13). One of the two pressure relief valves (3) is provided with a first pressure relief threshold and the other is provided with a second pressure relief threshold, wherein the first pressure relief threshold is greater than the second pressure relief threshold.

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