Rotary switching valve, integrated air supply device and pneumatic comfort system

Abstract

The utility model relates to the technical field of valve body equipment, in particular to a rotary switching valve, an integrated air supply device and a pneumatic comfort system. The rotary switching valve comprises a shell, a rotating piece and a driver. The shell is provided with a containing cavity, an air inlet and a plurality of inflation openings, the rotating part is rotatably arranged in the containing cavity, an air chamber is formed in the rotating part, and the air chamber is communicated with the air inlet; an attaching part is arranged on the outer side face of the rotating part and provided with a fluid channel, the fluid channel penetrates through the attaching part and communicates with the air chamber, and the attaching part is attached to the inner wall of the containing cavity; the driver is used for driving the rotating piece to rotate relative to the shell. By means of the mode, switching of the inflation inlet communicated with the air inlet can be achieved, the structure is simple, the manufacturing and assembling difficulty can be reduced, and the manufacturing cost is reduced; the air inlet is isolated from the containing cavity, loss of an air source is reduced, and the air leakage effect is improved.

Description

Technical Field

[0001] This application relates to the field of valve body equipment technology, and in particular to a rotary switching valve, an integrated air supply device, and a pneumatic comfort system. Background Technology

[0002] The pneumatic comfort system includes an air source, a fluid distribution device, and air bags. The fluid distribution device controls the airflow between the air source and each air bag, allowing for the inflation or deflation of multiple air bags. When multiple air bags are inflated or deflated synchronously or asynchronously, they generate impact or vibration to provide massage or support to the human body.

[0003] The fluid distribution device is a multi-path switching valve, where each path can be controlled to open or close. In existing technology, each path of the fluid distribution device has a valve body to control the opening and closing of each path. However, this type of fluid distribution device has a complex structure, is difficult to manufacture and assemble, and has high manufacturing costs. Utility Model Content

[0004] The embodiments of this application aim to provide a rotary switching valve, an integrated air supply device, and a pneumatic comfort system, so as to at least improve the problems of complex structure, difficult manufacturing and assembly, and high manufacturing cost of rotary switching valves.

[0005] In order to solve the above-mentioned technical problems, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a rotary switching valve, comprising a housing, a rotating component, and an actuator. The housing has a receiving cavity, an air inlet for connecting to an external fluid source, and multiple inflation ports for connecting to a fluid bladder. The multiple inflation ports surround the receiving cavity, and the air inlet communicates with the receiving cavity. The rotating component is rotatably disposed within the receiving cavity, and the rotating component has an internal air chamber that communicates with the air inlet. The outer surface of the rotating component has a fitting portion with a fluid channel extending through it and communicating with the air chamber. The fitting portion is fitted against the inner wall of the receiving cavity. The actuator is disposed within the housing and is drively connected to the rotating component. The actuator drives the rotating component to rotate relative to the housing. When the actuator drives the rotating component to rotate relative to the housing to a preset angle, the fluid channel aligns with one of the inflation ports, so that the air inlet communicates with the inflation port through the air chamber and the fluid channel, and the fitting portion isolates the air inlet from the receiving cavity.

[0007] In some embodiments, the housing further includes a vent, through which the receiving cavity communicates with the external environment.

[0008] In some embodiments, the rotating member has a mating hole along the rotation axis, and the mating hole communicates with the air chamber; the housing is provided with a mandrel that mates with the mating hole, and the mandrel and the mating hole are rotatably sealed.

[0009] In some embodiments, the outer circumferential surface of the mandrel is provided with a plurality of sealing ring surfaces arranged axially. The inner wall of the mating hole is provided with a plurality of sealing ring ribs spaced apart axially along the mandrel, and each sealing ring rib corresponds to a sealing ring surface for rotational sealing.

[0010] In some embodiments, along the direction in which the mandrel aligns with the mating hole, the outer diameters of the plurality of sealing ring surfaces decrease sequentially.

[0011] In some embodiments, the rotating member includes a base and an extension, the extension being fixed to the base, the base being adapted to the receiving cavity, and the base and the receiving cavity being rotatably sealed, the fitting portion being disposed on the side wall of the extension, at least a portion of the air chamber being disposed in the extension, the fluid channel penetrating the fitting portion and communicating with the air chamber in the extension, a gap being formed between the extension and the inner wall of the receiving cavity, and the inflation port communicating with the vent port through the gap.

[0012] In some embodiments, the housing includes a cylindrical portion, an end cap portion, and a flange portion. The end cap portion is detachably disposed on one end of the cylindrical portion, and the flange portion is disposed on the other end of the cylindrical portion. The flange portion is detachably connected to the driver.

[0013] In some embodiments, a protruding ring is provided on the side of the end cap facing the cylindrical part, the protruding ring surrounds the axis of the receiving cavity, the inner ring surface of the protruding ring is rotatably sealed to the outer peripheral surface of the rotating member, and the outer ring surface of the protruding ring is sealed to the inner peripheral surface of the cylindrical part.

[0014] Secondly, embodiments of this application provide an integrated gas supply device, which includes a pump body and a rotary switching valve as described in any of the preceding claims, wherein the pump body is connected to the air inlet.

[0015] Thirdly, embodiments of this application provide a pneumatic comfort system, the pneumatic comfort system including an air bag, an air source and a rotary switching valve as described in any of the above claims, the air bag being connected to the inflation port; the air source being connected to the air inlet.

[0016] The rotary switching valve, integrated air supply device, and pneumatic comfort system of this application embodiment include a housing, a rotating component, and a driver. The rotating component is driven to rotate relative to the housing by the driver, thus switching the air inlet connected to the air inlet. This simple structure reduces manufacturing and assembly difficulties and lowers manufacturing costs. The air inlet is isolated from the receiving cavity, which helps improve the problem of gas leakage from the air chamber into the receiving cavity, reduces air source loss, lowers the resistance to gas leakage from the air inlet through the receiving cavity, and improves the leakage effect.

[0017] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0018] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the rotary switching valve according to an embodiment of this application;

[0020] Figure 2 This is an exploded view of a rotary switching valve according to an embodiment of this application;

[0021] Figure 3 This is another exploded view of the rotary switching valve according to an embodiment of this application;

[0022] Figure 4 This is a perspective sectional view of the rotary switching valve according to an embodiment of this application;

[0023] Figure 5 yes Figure 4 A magnified view of a section at point A in the middle;

[0024] Figure 6 This is another cross-sectional view of the rotary switching valve according to an embodiment of this application.

[0025] The reference numerals in the detailed embodiments are as follows:

[0026] 100. Rotary switching valve;

[0027] 1. Shell; 11. Cylindrical section; 111. Receiving cavity; 112. Inlet; 113. Perforation; 114. Clearance hole; 12. End cap; 121. Air inlet; 122. Protruding ring; 123. Mandrel; 1231. Sealing ring surface; 124. Vent; 13. Flange; 131. First connecting hole;

[0028] 2. Rotating component; 21. Extension; 211. Air chamber; 212. Butt hole; 213. Sealing ring rib; 22. Fitting part; 221. Fluid channel; 23. Base; 231. Coupling hole;

[0029] 3. Driver; 31. Second connecting hole; 32. Drive shaft;

[0030] d. Gap. Detailed Implementation

[0031] To facilitate understanding of this application, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a more detailed account. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or there may be one or more intervening elements between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or there may be one or more intervening elements between them.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application 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. Therefore, they should not be construed as limitations on the embodiments of this application.

[0034] In the description of the embodiments of this application, the terms "first," "second," etc., are used to define components merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0036] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0037] Firstly, please refer to Figures 1 to 3 This application provides a rotary switching valve 100, which includes a housing 1, a rotating component 2, and a driver 3. The housing 1 has a receiving cavity 111, an air inlet 121, and multiple air inlets 112. The multiple air inlets 112 surround the receiving cavity 111, and the air inlet 121 communicates with the receiving cavity 111. Please refer to [further details omitted]. Figure 4 and Figure 5 The rotating member 2 is rotatably disposed within the receiving cavity 111. The rotating member 2 has an air chamber 211 inside, which communicates with the air inlet 121. The outer surface of the rotating member 2 is provided with a fitting portion 22, which has a fluid channel 221. The fluid channel 221 passes through the fitting portion 22 and communicates with the air chamber 211. The fitting portion 22 is fitted against the inner wall of the receiving cavity 111. The driver 3 is disposed on the housing 1 and is drively connected to the rotating member 2. The driver 3 is used to drive the rotating member 2 to rotate relative to the housing 1. Specifically, when the rotating member 2 rotates relative to the housing 1 to a preset angle, it aligns the fluid channel 221 with an air inlet 112, so that the air inlet 121 communicates with the air inlet 112 through the air chamber 211 and the fluid channel 221.

[0038] It is understood that there are multiple preset angles, and each inflation port 112 corresponds to at least one preset angle. When the rotating member 2 rotates to the preset angle corresponding to a certain inflation port 112, the fluid channel 221 connects with that inflation port 112, and then the air inlet 121 connects with that inflation port 112. Therefore, the rotary switching valve 100 of this embodiment can switch the inflation port 112 connected to the air inlet 121 by driving the rotating member 2 to rotate relative to the housing 1 through the driving member. At the same time, the rotary switching valve 100 of this embodiment can realize the above switching process through only the housing 1, the rotating member 2 and the driving member 3. Therefore, the rotary switching valve 100 of this embodiment has a simple structure, which helps to reduce the difficulty of manufacturing and assembly, and reduce manufacturing costs.

[0039] Regarding the aforementioned preset angle, the preset angle can be any angle at which the rotating component 2 rotates relative to the housing 1, as long as the fluid channel 221 is connected to a certain air inlet 112. Therefore, theoretically, there are an infinite number of preset angles. Preferably, the preset angle is such that the fluid channel 221 is directly opposite the air inlet 112, for example... Figure 4 and Figure 6 In this configuration, the central axis of the fluid channel 221 coincides with the central axis of an air inlet 112. At this time, the overlapping area between the fluid channel 221 and the air inlet 112 is the largest, which is beneficial to improving the efficiency of gas flow to the air inlet 112.

[0040] The air inlet 121 is used to connect to an external fluid source, such as a vacuum pump; the inflation port 112 is used to connect to a fluid bag, such as an air bag. It should be noted that in this embodiment, the fluid introduced into the rotary switching valve 100 is exemplified as gas, the external fluid source is a gas source, and the fluid bag is an air bag, allowing for the inflation and deflation of multiple air bags. In other embodiments, the fluid may also be a liquid or other fluid-flowing substance.

[0041] For housing 1 mentioned above, please refer to Figure 2 and Figure 3 The housing 1 includes a cylindrical portion 11 and an end cap portion 12, with the end cap portion 12 covering one end of the cylindrical portion 11. A receiving cavity 111 is formed by the cylindrical portion. In this embodiment, the receiving cavity 111 is cylindrical; in other embodiments, the receiving cavity 111 may also be frustum conical, flared, etc. The cylindrical receiving cavity 111 is easier to manufacture than other shapes, which helps reduce the manufacturing cost of the housing 1.

[0042] The end cap 12 is detachably mounted on one end of the cylindrical body 11, meaning that the end cap 12 can be manufactured separately from the cylindrical body 11 and then assembled together, which helps to reduce the manufacturing cost of the housing 1. It is understood that the end of the cylindrical body 11 facing the end cap 12 has an opening that communicates with the receiving cavity 111, and the rotating member 2 can be disassembled or installed in the receiving cavity 111 by removing the end cap 12.

[0043] The air inlet 121 is located on the end cap 12, and the air filling port 112 is located on the cylinder 11.

[0044] In some embodiments, please refer to Figure 2 and Figure 3 The cylindrical body 11 has perforations 113 along the axial direction to reduce the weight of the cylindrical body 11, reduce material costs, and the strength of the cylindrical body 11 is hardly weakened. There can be multiple perforations 113, which are spaced apart along the circumference of the cylindrical body 11.

[0045] In some embodiments, please refer to Figure 2 and Figure 3 The housing 1 also includes a flange portion 13, which is located at the other end of the cylindrical portion 11, i.e., the end cap portion 12 and the flange portion 13 are respectively located at both ends of the cylindrical portion 11. The flange portion 13 is detachably connected to the actuator 3. Specifically, the flange portion 13 has a first connecting hole 131, and the actuator 3 has a second connecting hole 31. The first connecting hole 131 and the second connecting hole 31 can be fitted with the same fastener, such as a screw or bolt, to detachably mount the actuator 3 to the housing 1.

[0046] In some embodiments, please refer to Figure 3 and Figure 4 A protruding ring 122 is provided on the side of the end cap portion 12 facing the cylindrical portion 11. The protruding ring 122 surrounds the axis of the receiving cavity 111, and the outer ring surface of the protruding ring 122 is sealed to the inner circumferential surface of the cylindrical portion 11. It can be understood that the diameter of the outer ring surface of the protruding ring 122 is greater than or equal to the inner diameter of the receiving cavity 111. When the protruding ring 122 is nested with the cylindrical portion 11, the outer ring surface of the protruding ring 122 is in close contact with the inner wall of the cylindrical portion 11, thereby sealing to the inner circumferential surface of the cylindrical portion 11 and enhancing the airtightness between the cylindrical portion 11 and the end cap. A sealant can be provided between the protruding ring 122 and the cylindrical portion 11 to bond the end cap portion 12 to the cylindrical portion 11 and increase the airtightness between the two; a sealing ring can also be provided between the protruding ring 122 and the cylindrical portion 11 to increase the airtightness.

[0047] In some embodiments, please refer to Figure 3 and Figure 4The inner annular surface of the convex ring 122 rotates and seals with the outer circumferential surface of the rotating member 2. It can be understood that the diameter of the inner annular surface of the convex ring 122 is less than or equal to the outer diameter of the rotating member 2. When the convex ring 122 is fitted onto the rotating member 2, the inner annular surface of the convex ring 122 is in close contact with the outer circumferential surface of the rotating member 2, thus sealing and enhancing the airtightness between the rotating member 2 and the end cap 12. Since the rotating member 2 can rotate within the convex ring 122, the inner annular surface of the convex ring 122 rotates and seals with the outer circumferential surface of the rotating member 2.

[0048] For the aforementioned rotating component 2, please refer to Figures 2 to 4 The rotating component 2 includes a base 23 and an extension 21 connected to each other. The extension 21 is fixed to the base 23. The base 23 is adapted to the receiving cavity 111. The fitting part 22 is disposed on the side wall of the extension 21. At least a portion of the air chamber 211 is disposed in the extension 21. The fluid channel 221 passes through the fitting part 22 and communicates with the air chamber 211 in the extension 21. There is a gap d between the extension 21 and the inner wall of the receiving cavity 111. The air inlet 112 communicates with the air outlet 124 through the gap d. Specifically, the extension 21 is cylindrical, and the outer diameter of the extension 21 is smaller than the inner diameter of the receiving cavity 111, so that there is an annular cavity between the extension 21 and the inner wall of the receiving cavity 111; the fitting part 22 is provided on the outer peripheral surface of the extension 21, and the sum of the thickness of the fitting part 22 along the radial direction of the receiving cavity 111 and the radius of the extension 21 is equal to the radius of the receiving cavity 111, so that the side of the fitting part 22 away from the extension 21 is tightly fitted to the inner wall of the receiving cavity 111, and the inner wall of the receiving cavity 111 seals the fluid channel 221. When the fluid channel 221 is aligned with the air inlet 112, the fluid in the fluid channel 221 flows into the air inlet 112.

[0049] In some embodiments, the fitting portion 22 isolates the air inlet 121 from the receiving cavity 111. It is understood that the fluid channel 221 is located on one side of the fitting portion 22 that is tightly fitted to the inner wall of the receiving cavity 111, thereby forming a seal. That is, the fitting portion 22 slides and seals against the inner wall of the housing 1 at the edge of the fluid channel 221 to isolate the air chamber 211 from the gap d. The gap d is a part of the receiving cavity 111, meaning the fitting portion 22 isolates the air inlet 121 from the receiving cavity 111. This helps to improve the problem of gas leakage from the air inlet 121 and the air chamber 211 to the gap d of the receiving cavity 111, reduces gas source loss, lowers the resistance to gas leakage from the inflation port 112 through the gap d of the receiving cavity 111, and improves the leakage effect.

[0050] The end face of the extension 21 abuts against the end cap 12 to connect the air chamber 211 with the air inlet 121.

[0051] In this embodiment, the inner ring surface of the convex ring 122 rotates and seals with the outer peripheral surface of the extension 21.

[0052] In some embodiments, please refer to Figures 2 to 4 The rotating component 2 has a mating hole 212 along its rotation axis, which communicates with the air chamber 211. The housing 1 is provided with a spindle 123, which communicates with the air inlet 121 and mates with the mating hole 212, creating a rotational seal. The mating of the spindle 123 with the mating hole 212 enhances the airtightness of the connection between the air inlet 121 and the air chamber 211. It is understood that the spindle 123 is cylindrical, and the mating hole 212 is cylindrical, allowing the spindle 123 to rotate within the mating hole 212, thus achieving a rotational seal. Specifically, the spindle 123 is located in the end cap portion 12, and the mating hole 212 is located in the extension portion 21.

[0053] In some embodiments, please refer to Figure 5 Multiple sealing ring surfaces 1231 are arranged axially on the outer peripheral surface of the mandrel 123. Multiple sealing ring ribs 213 are spaced apart along the axial direction of the mandrel 123 on the inner wall of the mating hole 212, with each sealing ring rib 213 corresponding to a sealing ring surface 1231 for rotational sealing. By rotating and sealing multiple sealing ring surfaces 1231 with multiple sealing ring ribs 213 respectively, a multi-stage seal can be formed, similar to a labyrinth seal structure, enhancing the sealing effect of the rotational seal between the mandrel 123 and the mating hole 212, and maximizing the prevention of fluid leakage within the air chamber. Optionally, the sealing ring ribs 213 can be made of rubber or silicone and are bonded to the inner wall of the mating hole 212.

[0054] In some embodiments, please refer to Figure 5 Along the direction in which the mandrel 123 aligns with the mating hole 212, the outer diameters of the multiple sealing ring surfaces 1231 decrease sequentially. Correspondingly, along the direction in which the mandrel 123 aligns with the mating hole 212, the inner diameters of the multiple sealing ring ribs 213 decrease sequentially. The direction in which the mandrel 123 aligns with the mating hole 212 refers to the direction in which the mandrel 123 is inserted into the mating hole 212 when assembling the housing 1 and the rotating component 2. By making the outer diameters of the multiple sealing ring surfaces 1231 decrease sequentially, when the mandrel 123 is inserted into the mating hole 212, the sealing ring surfaces 1231 do not need to pass through multiple sealing ring ribs 213 sequentially, reducing the resistance and difficulty of inserting the mandrel 123 into the mating hole 212, and reducing the assembly difficulty of the housing 1 and the rotating component 2.

[0055] In some embodiments, please refer to Figure 6Along the circumference of the receiving cavity 111, the width a of the fitting portion 22 is smaller than the distance b between two adjacent air ports 112. Thus, the fitting portion 22 can be located between two adjacent air ports 112 without obstructing them. That is, when the fluid channel 221 is connected to one air port 112, the other air ports 112 are connected to the gap d for deflation, which helps to enhance the deflation effect of the air ports 112.

[0056] In some embodiments, please refer to Figures 2 to 4 The base 23 is rotatably sealed with the receiving cavity 111. Specifically, the base 23 is cylindrical, and the outer diameter of the base 23 is equal to the inner diameter of the receiving cavity 111. Thus, the base 23 is rotatably disposed on the housing 1, that is, the base 23 is rotatably sealed with the receiving cavity 111, which is beneficial to improving the stability of the rotating part 2 rotating in the receiving cavity 111.

[0057] In this embodiment, the base 23 is located at the end of the extension 21 opposite to the air inlet 121, that is, the base 23 and the housing 1 form a sealed cavity, and the extension 21 and the fitting part 22 are both located within the sealed cavity. Therefore, the gap d is located within the sealed cavity and is isolated from the external environment.

[0058] In some embodiments, the housing 1 further includes a vent 124, through which the receiving cavity 111 communicates with the external environment. The vent 124 communicates with a gap. Specifically, the vent 124 extends to the end face of the protruding ring 122, thus communicating with the gap d to connect it to the external environment. Optionally, the vent 124 is a circular hole, and there are multiple such holes.

[0059] In some embodiments, please refer to Figures 2 to 4 The base 23 has a coupling hole 231. The driver 3 includes a drive shaft 32, which passes through the coupling hole 231 to drive the rotating member 2. The shape of the drive shaft 32 is adapted to the shape of the coupling hole 231 so that the rotating member 2 rotates synchronously with the drive shaft 32. Optionally, the coupling hole 231 can be square, semi-circular, or arc-shaped.

[0060] In some embodiments, please refer to Figure 3 and Figure 4The cylindrical portion 11 has an axially oriented clearance hole 114 that connects to the receiving cavity 111 and allows the drive shaft 32 to pass through. The drive shaft 32 passes through the clearance hole 114 and extends into the receiving cavity 111 to drive the rotating member 2. The inner diameter of the clearance hole 114 is smaller than the inner diameter of the receiving cavity 111, thus confining the rotating member 2 within the receiving cavity 111. It can be understood that in this embodiment, the cylindrical portion 11 is a cylindrical shape with an opening at one end, and the end cap 12 covers the opening of the cylindrical portion 11. The other end of the cylindrical portion 11 allows the drive shaft 32 to extend into the receiving cavity 111 and drive the rotating member 2. Therefore, the cylindrical portion 11 can also be understood as having openings at both ends.

[0061] Secondly, embodiments of this application provide an integrated gas supply device (not shown), which includes a pump body and a rotary switching valve 100. The pump body is connected to an air inlet 121. The pump body can pump gas into the air inlet 121. The integrated gas supply device possesses the structural features and beneficial effects of the rotary switching valve 100, which will not be elaborated here.

[0062] Thirdly, this application provides a pneumatic comfort system (not shown). The pneumatic comfort system includes an air bag, an air source, and a rotary switching valve 100. The air bag is connected to an inflation port 112, and the air source is connected to an air inlet 121. Gas in the inflation port 112 can flow into the air bag, then through the air chamber 211 of the rotating component 2 and the fluid channel 221 back to the inflation port 112, and finally into the air bag to inflate it. Gas in the air bag can also flow to the external environment through the inflation port 112 and the gap d to deflate the air bag. The pneumatic comfort system possesses the structural features and beneficial effects of the rotary switching valve 100, which will not be elaborated here. The air source can be a centrifugal fan, a ring fan, a Roots blower, a Roots vacuum pump, a water ring vacuum pump, an air compressor, etc. The air bag can be a rubber bag, a plastic bag, etc.

[0063] In the rotary switching valve 100, integrated air supply device, and pneumatic comfort system of this application embodiment, the rotary switching valve 100 includes a housing 1, a rotating component 2, and a driver 3. The rotating component 2 is driven to rotate relative to the housing 1 by the driver, thus switching the air inlet 112 connected to the air inlet 121. This simple structure reduces manufacturing and assembly difficulty and lowers manufacturing costs. The fitting portion 22 isolates the air inlet 121 from the receiving cavity 111, which helps improve the problem of gas leakage from the air inlet 121 into the receiving cavity 111, reduces gas source loss, reduces the resistance of gas leakage from the air inlet 112 through the receiving cavity 111, and improves the leakage effect. The end cap portion 12 can be manufactured separately from the cylinder portion 11, which helps reduce the manufacturing cost of the housing 1. The protruding ring 122 of the end cap portion 12 enhances the airtightness between the cylinder portion 11 and the end cap, as well as the airtightness between the rotating component 2 and the end cap portion 12. The mandrel 123 is aligned with the docking hole 212, which helps to enhance the airtightness of the connection between the air inlet 121 and the air chamber 211. The width a of the fitting part 22 is smaller than the distance b between two adjacent air inlets 112, which helps to enhance the air release effect of the air inlet 112.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of this application as described above, which are not provided in detail for the sake of brevity; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A rotary switching valve, characterized in that, include: The housing has a receiving cavity, an air inlet for connecting to an external fluid source, and multiple air inlets for connecting to a fluid bladder. The multiple air inlets surround the receiving cavity, and the air inlet communicates with the receiving cavity. A rotating component is rotatably disposed within the receiving cavity. The rotating component has an air chamber inside, which communicates with the air inlet. The outer side of the rotating component is provided with a fitting portion, which is provided with a fluid channel. The fluid channel passes through the fitting portion and communicates with the air chamber. The fitting portion is fitted to the inner wall of the receiving cavity. A driver is disposed in the housing and is connected to the rotating member for transmission. The driver is used to drive the rotating member to rotate relative to the housing. When the driver drives the rotating member to rotate relative to the housing to a preset angle, the fluid channel is aligned with one of the air ports so that the air inlet communicates with the air port through the air chamber and the fluid channel, and the fitting portion isolates the air inlet from the receiving cavity.

2. The rotary switching valve according to claim 1, characterized in that, The housing also includes a vent, through which the receiving cavity communicates with the external environment.

3. The rotary switching valve according to claim 2, characterized in that, The rotating component has a docking hole along the rotation axis, and the docking hole communicates with the air chamber. The housing is provided with a mandrel that mates with the mating hole, and the mandrel and the mating hole are rotatably sealed.

4. The rotary switching valve according to claim 3, characterized in that, The outer circumferential surface of the mandrel is provided with multiple sealing ring surfaces arranged axially. The inner wall of the docking hole is provided with a plurality of sealing ring ribs spaced apart along the axial direction of the mandrel, and each sealing ring rib is rotatably sealed with a corresponding sealing ring surface.

5. The rotary switching valve according to claim 4, characterized in that, Along the direction in which the mandrel aligns with the mating hole, the outer diameters of the plurality of sealing ring surfaces decrease sequentially.

6. The rotary switching valve according to claim 2, characterized in that, The rotating component includes a base and an extension. The extension is fixed to the base. The base is adapted to the receiving cavity and the base and the receiving cavity are rotatably sealed. The fitting portion is disposed on the side wall of the extension. At least a portion of the air chamber is disposed in the extension. The fluid channel passes through the fitting portion and communicates with the air chamber in the extension. There is a gap between the extension and the inner wall of the receiving cavity. The inflation port communicates with the vent port through the gap.

7. The rotary switching valve according to claim 6, characterized in that, The housing includes a cylindrical body, an end cap, and a flange. The end cap is detachably disposed on one end of the cylindrical body, and the flange is disposed on the other end of the cylindrical body. The flange is detachably connected to the driver.

8. The rotary switching valve according to claim 7, characterized in that, A protruding ring is provided on the side of the end cap facing the cylindrical part. The protruding ring surrounds the axis of the receiving cavity. The inner ring surface of the protruding ring is rotatably sealed to the outer circumferential surface of the rotating member, and the outer ring surface of the protruding ring is sealed to the inner circumferential surface of the cylindrical part.

9. An integrated gas supply device, characterized in that, include: The rotary switching valve as described in any one of claims 1 to 8; The pump body is connected to the air inlet.

10. A pneumatic comfort system, characterized in that, include: The rotary switching valve as described in any one of claims 1 to 8; An air bag, connected to the inflation port; The air source is connected to the air inlet.

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