Valve device

Abstract

The utility model discloses a valve device. The valve device comprises a shell, a valve element and a valve element, wherein the shell is provided with at least one fluid inlet and at least one fluid outlet; the fixed valve piece and the movable valve piece are arranged in the shell, and the fixed valve piece comprises at least one fixed valve piece channel; the movable valve piece comprises at least one movable valve piece channel and is configured to be driven by a rotating shaft to rotate around an axis; a driving unit driving the rotating shaft to rotate; a limiting rod is arranged on the rotating shaft, and comprises a driving connecting part connected with the rotating shaft, so that the limiting rod is driven to rotate; the movable valve piece connecting part is connected with the movable valve piece so as to drive the movable valve piece to rotate when the limiting rod is driven to rotate; and the limiting abutting part abuts against a fixed limiting part when the rotating shaft rotates to the maximum angle. Driving and positioning of the movable valve piece are achieved through the limiting rod, and the control precision of the movable valve piece is improved through the rotating and positioning integrated structural design.

Description

[0001] This application is based on a Chinese patent application with the application number: 202421840662.5 and the filing date of July 31, 2024, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is incorporated herein by reference. Technical Field

[0002] The utility model relates to the technical field of automotive air-conditioning control, and more particularly, to a valve device. Background Art

[0003] Valve devices are mainly applied in pipeline systems. In the field of new energy vehicles, multi-way valve devices are usually used to control the flow of heating or cooling fluids between air conditioners, battery packs, motors, and other systems to achieve different controls and operations.

[0004] When the existing valve device is being repositioned, the initial and final positions of the moving valve plate are not accurately positioned, and the driving operation and limiting operation of the moving valve plate are independent of each other, resulting in errors in the flow channel connection of the valve device at different positions. Summary of the Utility Model

[0005] To solve the problem of low control accuracy in driving and limiting the moving valve plate, the purpose of the utility model is to provide a valve device.

[0006] The utility model provides a valve device, comprising:

[0007] A housing, the housing comprising at least one fluid inlet and at least one fluid outlet;

[0008] A fixed valve member, disposed within the housing, the fixed valve member comprising at least one fixed valve member channel;

[0009] A moving valve member, disposed within the housing, the moving valve member comprising at least one moving valve member channel and configured to be rotated about an axis by a rotating shaft so that the at least one fixed valve member channel cooperates with the at least one moving valve member channel to form a fluid channel between at least one of the fluid inlets and at least one of the fluid outlets;

[0010] A drive unit configured to drive the rotating shaft to rotate;

[0011] Characterized in that a limiting rod is provided on the rotating shaft, the limiting rod comprising:

[0012] A drive connection portion, the drive connection portion being connected to the rotating shaft so that the limiting rod is driven to rotate;

[0013] A moving valve member connection portion, the moving valve member connection portion being connected to the moving valve member to drive the moving valve member to rotate when the limiting rod is driven to rotate;

[0014] A limiting abutting portion, which abuts against a fixed limiting portion when the rotating shaft rotates to the maximum angle.

[0015] As a further improvement of the present utility model, there is a space between the moving valve member and the driving unit, at least one of the fluid inlets or the fluid outlets is communicated with the space, and the rotating shaft is located in the space.

[0016] As a further improvement of the present utility model, the driving connection portion is located on the axis, and the limiting abutting portion is located between the driving connection portion and the connecting portion of the moving valve member.

[0017] As a further improvement of the present utility model, a connecting boss is provided on one side of the moving valve member close to the limiting rod, and the connecting boss is located on the outer periphery of the moving valve member far from its rotation center, and a part of the connecting boss is recessed inward to form a clamping groove matching the connecting portion of the moving valve member.

[0018] As a further improvement of the present utility model, a strip-shaped groove adapted to the limiting abutting portion is further provided on one side of the moving valve member close to the limiting rod, and the strip-shaped groove is communicated with the clamping groove.

[0019] As a further improvement of the present utility model, the projection of the moving valve member in the axial direction is circular, and the rotating shaft at least partially extends along the radial direction of the circle.

[0020] As a further improvement of the present utility model, the fixed limiting portion has a first stop wall and a second stop wall extending along the radial direction, the first stop wall and the second stop wall are arranged at an angle and intersect with the rotation plane of the limiting rod to limit the rotation range of the limiting rod.

[0021] As a further improvement of the present utility model, a clamping portion is formed by the rotating shaft extending along its radial direction, the clamping portion is located on the side of the moving valve member far from the fixed valve member, and limits the movement of the moving valve member in the direction away from the fixed valve member.

[0022] As a further improvement of the present utility model, a corrugated spring is arranged at the abutting position of the clamping portion and the moving valve member to apply an elastic force for pressing the moving valve member against the fixed valve member.

[0023] As a further improvement of the present utility model, at least one groove is provided on the side of the moving valve member facing the fixed valve member, and the projection of the groove and the passage of the moving valve member on the abutting surface of the moving valve member and the fixed valve member do not coincide.

[0024] The beneficial effects of the present utility model are as follows: A limiting structure cooperating with the rotating shaft is provided on the upper part of the moving valve element. When the rotating shaft rotates, the moving valve element can be driven to rotate through the limiting structure. After the moving valve element rotates to the in-place position, the positioning of the moving valve element is completed by the blocking of the fixed limiting part on the rotating shaft. This structure integrating rotation and positioning improves the control accuracy of the moving valve element. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 An exploded view of a valve device according to an exemplary embodiment of the present utility model;

[0027] Figure 2 A state diagram of the fixed limiting part positioning the moving valve plate according to an exemplary embodiment of the present utility model;

[0028] Figure 3 A schematic structural diagram of the top surface of the moving valve element according to an exemplary embodiment of the present utility model;

[0029] Figure 4 A schematic structural diagram of the fixed limiting part according to an exemplary embodiment of the present utility model;

[0030] Figure 5 A schematic structural diagram of the bottom surface of the moving valve element according to an exemplary embodiment of the present utility model;

[0031] Figure 6 A longitudinal sectional view of a valve device according to an exemplary embodiment of the present utility model;

[0032] Figure 7 A state diagram of the fixed limiting part positioning the moving valve plate according to another exemplary embodiment of the present utility model;

[0033] Figure 8 A schematic structural diagram of the fixed limiting part according to another exemplary embodiment of the present utility model;

[0034] Figure 9 An exploded view of a rotating shaft and a limiting rod according to another exemplary embodiment of the present utility model;

[0035] Figure 10 An assembled view of a rotating shaft and a limiting rod according to another exemplary embodiment of the present utility model;

[0036] Figure 11 The state diagram of the fixed limiting part positioning the moving valve plate according to another exemplary embodiment of the present utility model;

[0037] Figure 12 The structural schematic diagram of a rotating shaft, a limiting rod and a transmission rod according to another exemplary embodiment of the present utility model.

[0038] In the figure,

[0039] 11. Rotor assembly; 12. Rotating shaft; 121. Clamping part; 13. Limiting rod; 131. Driving connection part; 132. Moving valve part connection part; 133. Limiting abutting part; 134. Limiting connection part; 14. Transmission rod;

[0040] 21. Composite gear ring; 211. Communication hole;

[0041] 22. Moving valve part; 221. First moving valve part channel; 222. Second moving valve part channel; 223. Connecting boss; 224. Groove; 225. Strip-shaped groove; 226. Card slot;

[0042] 23. Fixed valve part; 231. First fixed valve part channel; 232. Second fixed valve part channel; 233. Third fixed valve part channel;

[0043] 24. Housing; 241. First fluid port; 242. Second fluid port;

[0044] 30. Bearing seat; 31. Fixed limiting part; 311. First blocking arm; 312. Second blocking arm;

[0045] 40. Bellows spring. Detailed implementation manners

[0046] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0047] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, in the description of the present utility model, the terms used are for illustrative purposes only and are not intended to limit the scope of the present utility model. The terms "comprising" and / or "including" are used to specify the presence of the described elements, steps, operations, and / or components, but do not exclude the presence or addition of one or more other elements, steps, operations, and / or components. The terms "first", "second", etc. may be used to describe various elements, do not represent an order, and do not limit these elements. In addition, in the description of the present utility model, unless otherwise specified, "plural" means two or more. These terms are only used to distinguish one element from another. In conjunction with the following drawings, these and / or other aspects become apparent, and it is easier for those of ordinary skill in the art to understand the description of the embodiments of the present utility model. The drawings are only used to depict the embodiments of the present utility model for illustrative purposes. Those skilled in the art will readily recognize from the following description that alternative embodiments of the structure and method shown in the present utility model can be adopted without departing from the principles described in the present utility model.

[0049] Embodiment 1

[0050] As Figure 1 and Figure 6 shown, a valve device according to an embodiment of the present utility model includes: a housing 24, a fixed valve member 23, a movable valve member 22, a driving unit, and a limiting rod 13.

[0051] The housing 24 includes at least one fluid inlet and at least one fluid outlet. For example, the first fluid port 241 is the first fluid inlet, and the second fluid port 242 is the first fluid outlet. Other fluid inlets or fluid outlets can also be provided on the housing 24 according to requirements, not limited to the above-mentioned first fluid port 241 and second fluid port 242, such as also including a third fluid port (not shown in the figure) and a fourth fluid port (not shown in the figure).

[0052] The fixed valve member 23 is disposed inside the housing 24, and the fixed valve member 23 includes at least one fixed valve member channel. For example, three fixed valve member channels are provided on the fixed valve member 23, namely the first fixed valve member channel 231, the second fixed valve member channel 232, and the third fixed valve member channel 233. Preferably, these three fixed valve member channels are evenly arranged along the circumferential direction of the fixed valve member 23. Other numbers of fixed valve member channels can also be provided on the fixed valve member 23 according to requirements, and the present application does not specifically limit it.

[0053] The movable valve member 22 is disposed inside the housing 24, and the movable valve member 22 includes at least one movable valve member channel and is configured to be driven by a rotating shaft 12 to rotate around an axis so that at least one fixed valve member channel cooperates with at least one movable valve member channel to form a fluid channel between at least one fluid inlet and at least one fluid outlet. For example, as Figure 5As shown, the movable valve member 22 is provided with a first movable valve member channel 221 and a second movable valve member channel 222. The first movable valve member channel 221 is a through hole that penetrates the movable valve member 22 along the axial direction; the second movable valve member channel 222 is provided on the side of the movable valve member 22 facing the fixed valve member 23 and is a fluid groove or through hole parallel to the movable valve member 22. For example, when the movable valve member 22 is in the first position, the first movable valve member channel 221 communicates with the first fixed valve member channel 231, forming a fluid channel between the first flow channel opening 241 and the third flow channel opening (not shown in the figure); the two ends of the second movable valve member channel 222 are respectively communicated with the second fixed valve member channel 232 and the third fixed valve member channel 233, forming a fluid channel between the second flow channel opening 242 and the fourth flow channel opening (not shown in the figure). When the movable valve member 22 is in the second position, the first movable valve member channel 221 is connected to the second fixed valve member channel 232, forming a fluid channel between the first flow channel opening 241 and the second flow channel opening 242; the two ends of the second movable valve member channel 222 are respectively connected to the first fixed valve member channel 231 and the third fixed valve member channel 233, forming a fluid channel between the third flow channel opening (not shown in the figure) and the fourth flow channel opening.

[0054] The driving unit of the valve device may be, for example, a rotor assembly 11, which drives the rotating shaft 12 to rotate. The output end of the rotor assembly 11 is connected to one end of the rotating shaft 12, thereby driving the rotating shaft 12 to rotate synchronously.

[0055] A limiting rod 13 is provided on the rotating shaft 12, and the limiting rod 13 includes:

[0056] A driving connection part, a movable valve member connection part and a limiting abutment part, wherein the driving connection part is connected to the rotating shaft 12 so that the limiting rod 13 is driven to rotate; the movable valve member connection part is connected to the movable valve member 22 to drive the movable valve member 22 to rotate when the limiting rod 13 is driven to rotate; the limiting abutment part abuts against a fixed limiting part 31 when the rotating shaft 12 rotates to the maximum angle.

[0057] Preferably, Figure 1 and Figure 2As shown, the driving connection part corresponds to the first end of the limiting rod 13, the moving valve part connection part corresponds to the second end of the limiting rod, and the limiting abutting part corresponds to the position between the first end and the second end of the limiting rod 13. The limiting rod 13 is connected to the rotating shaft 12 through its first end, so that the limiting rod 13 rotates synchronously under the drive of the rotating shaft 12; the limiting rod 13 is connected to the second moving valve part 22 through its second end, so as to drive the second moving valve part 22 to rotate under the drive of the limiting rod 13, so as to change the relative position of the moving valve part 22 relative to the fixed valve part 23, and realize the communication between different moving valve channels and different fixed valve channels, and form different fluid channels. The limiting rod 13 positions the moving valve part 22 through the part between the first end and the second end, that is, the rotation of the moving valve part 22 from the first position to the second position is the maximum angle that the rotating shaft 12 can rotate. At this time, the part between the first end and the second end of the limiting rod 13 abuts against the fixed limiting part 31, blocking the limiting rod 13 from continuing to rotate, and finally positioning the moving valve part 22 at the second position. The process of the moving valve part 22 rotating from the second position to the first position is the same, and will not be repeated here.

[0058] More preferably, continue to refer to Figure 1 and Figure 2 , the driving connection part is located on the axis, and the limiting abutting part is located between the driving connection part and the moving valve part connection part. The driving connection part corresponds to one end of the limiting rod 13 close to the rotating shaft 12. An installation hole is provided at the corresponding position of the rotating shaft 12. The end of the limiting rod 13 is inserted into the installation hole and fixedly connected to the rotating shaft 12, so that the driving connection part is located on the central axis of the rotating shaft 12. The limiting abutting part corresponds to the rod body between the two ends of the limiting rod 13, and abuts against the fixed limiting part 31 through the rod body, thereby blocking the limiting rod 13 from continuing to rotate.

[0059] An optional implementation manner, as shown in Figure 1 and Figure 6 , there is a space between the moving valve part 22 and the rotor assembly 11, at least one fluid inlet or fluid outlet is communicated with this space, and the rotating shaft 12 is located in this space. Preferably, the moving valve part 22, the bearing seat 30 and the compound gear ring 21 jointly form this space. Among them, the compound gear ring 21 is a cylindrical part with openings at both upper and lower ends. The output end of the rotor assembly 11 extends into the compound gear ring 21 through the upper opening of the compound gear ring 21. The bearing seat 30 is located in the compound gear ring 21 and is arranged adjacent to the rotor assembly 11. The bearing seat 30 is connected to the inner wall of the compound gear ring 21 through its periphery, and the moving valve part 22 is arranged inside the compound gear ring 21 through the lower opening of the compound gear ring 21. A plurality of communication holes, such as 3, 4, 5, 6, etc., are provided on the side wall of the compound gear ring 21 between the bearing seat 30 and the moving valve part 22. The present application does not specifically limit its quantity. The fluid inlet or fluid outlet is communicated with the space formed by the moving valve part 22, the bearing seat 30 and the compound gear ring 21 through the corresponding communication hole.

[0060] An optional implementation method, such as Figure 2 and Figure 3 As shown, a connecting boss 223 is provided on one side of the movable valve member 22 close to the limiting rod 13, and the connecting boss 223 is located on the outer periphery of the movable valve member 22 away from its rotation center. Part of the connecting boss 223 is recessed inward to form a slot 226 that matches the connecting portion of the movable valve member.

[0061] Furthermore, a strip groove 225 adapted to the limiting abutment portion is further provided on a side of the movable valve member 22 close to the limiting rod 13 , and the strip groove 225 is communicated with the clamping groove 226 .

[0062] It is understood that the connecting boss 223 is provided on the end face of the movable valve member 22 facing the limiting rod 13, and the connecting boss 223 is provided near the edge of the end face. This increases the force arm between the rotating shaft 12 and the movable valve member 22, thereby making it easier for the limiting rod 13 to drive the movable valve member 22. Furthermore, compared to the prior art method of directly driving the movable valve member via the rotating shaft, the present invention connects the limiting rod 13 to the edge of the movable valve member 22 to drive the movable valve member 22, thereby improving the control accuracy of the movable valve member 22 and facilitating better elimination of machining errors between the rotating shaft and the movable valve member 22 during machining.

[0063] Preferably, the connecting boss 223 is configured as a protrusion approximately in the shape of a concave on the end surface of the movable valve member 22 facing the limiting rod 13. The portion surrounded by the concave is recessed in the direction away from the limiting rod 13 to form a slot 226. The end of the limiting rod 13 away from the rotating shaft 12 is snapped into the slot 226, achieving a fixed connection between the limiting rod 13 and the movable valve member 22, so that the movable valve member 22 is driven to rotate synchronously with the rotation of the limiting rod 13.

[0064] More preferably, a strip groove 225 is further provided on the end surface of the movable valve member 22 facing the limiting rod 13, which is connected to the retaining groove 226. The limiting abutment portion of the limiting rod 13 (i.e., the rod body between the two ends of the limiting rod 13) is accommodated in the strip groove 225, further securing the limiting rod 13, strengthening the connection between the limiting rod 13 and the movable valve member 22, and preventing the limiting rod 13 from disengaging from the retaining groove 226 during rotation of the movable valve member 22. Furthermore, one end of the strip groove 225 near the rotating shaft 12 is connected to the center hole of the movable valve member 22, and the other end of the strip groove 225 is connected to the retaining groove 226. On the one hand, this improves the stability of the connection between the limiting rod 13 and the movable valve member 22. On the other hand, due to the recessed arrangement between the strip groove 225 and the retaining groove 226, the overall height of the valve device can be reduced, saving installation space.

[0065] An optional implementation method, such as Figure 1 and Figure 6As shown, the projection of the moving valve member 22 in the axial direction is circular, and the rotating shaft 12 at least partially extends along the radial direction of this circle. The rotating shaft 12 is formed with a clamping portion 121 along its radial extension. This clamping portion 121 is located on the side of the moving valve member 22 away from the fixed valve member 23 and restricts the movement of the moving valve member 22 in the direction away from the fixed valve member 23.

[0066] Specifically, the moving valve member 22 is approximately cylindrical with a certain thickness. Among them, the thickness on the side where the first moving valve member channel 221 is located is smaller than the thickness on the side of the second moving valve member channel 222, which facilitates the formation of an internal flow channel by the second moving valve member channel 222 in the moving valve member 22 to change the flow direction of the fluid flowing through it. The other end of the rotating shaft 12 passes through the moving valve member 22 through the central hole of the moving valve member 22. The clamping portion 121 formed by the rotating shaft 12 extending along the circular radial direction is clamped with the upper end surface of the central hole of the moving valve member 22, applying a downward pressure on the moving valve member 22. When the second moving valve member channel 222 is impacted by the fluid, it can inhibit the movement of the moving valve member 22 in the direction away from the fixed valve member 23 and avoid fluid leakage between the moving valve member 22 and the fixed valve member 23.

[0067] Furthermore, continue to refer to Figure 1 and Figure 6 , a corrugated spring 40 is provided at the abutting position between the clamping portion 121 and the moving valve 22 to apply an elastic force that presses the moving valve member 22 against the fixed valve member 23. The corrugated spring 40 is provided between the clamping portion 121 and the upper end surface of the central hole of the moving valve member 22. When the fluid flows from the fixed valve member 23 to the moving valve member 22, the moving valve member 22 has a tendency to move upward due to the action of the fluid. At this time, the corrugated spring 40 is compressed and will apply an elastic force that presses the moving valve member 22 against the fixed valve member 23, further ensuring that there is no fluid leakage between the moving valve member 22 and the fixed valve member 23.

[0068] An alternative embodiment, the fixed limiting portion 31 has a first stop wall 311 and a second stop wall 312 extending radially. The first stop wall 311 and the second stop wall 312 are arranged at an angle and intersect with the rotation plane of the limiting rod 13 to limit the rotation range of the limiting rod 13.

[0069] As Figure 2 and Figure 4As shown, the fixed limiting portion 31 can be set as a rib approximately in the shape of a "W", for example. The rib on the left side is the first stop wall 311, and the rib on the right side is the second stop wall 312. When the limiting rod 13 abuts against the first stop wall 311, it corresponds to the first position of the moving valve member 22; when the limiting rod 13 abuts against the second stop wall 312, it corresponds to the second position of the moving valve member 22. The angle between the first stop wall 311 and the second stop wall 312 can be determined according to the corresponding position relationship between multiple moving valve member channels and multiple fixed valve member channels, as long as it is ensured that when the moving valve member 22 is in the first position or the second position, the corresponding fixed valve member channel and the moving valve member channel can be accurately connected.

[0070] Furthermore, as Figure 2 shown, the contact between the limiting rod 13 and the stop wall 311 is a line contact. Compared with the point contact between the transmission limiting rod and the stop rod, the contact area is larger, which helps to disperse the pressure, reduce local stress concentration, and at the same time can reduce the wear caused by friction and extend the service life of the limiting rod.

[0071] Furthermore, as Figure 1 and Figure 4 shown, the fixed limiting portion 31 is arranged on the bearing seat 30 and is located on the side of the bearing seat 30 facing the limiting rod 13. The bearing seat 30 is located inside the compound gear ring 21, and the bearing seat 30 is arranged parallel to the moving valve member 22. The bearing seat 30 is fixedly connected to the inner wall of the compound gear ring 21 through its periphery, so that the plane where the fixed limiting portion 31 is located intersects with the rotation plane of the limiting rod 13. Thus, when the limiting rod 13 rotates, the positioning of the moving valve member 22 can be achieved by its abutment against the fixed limiting portion 31. Preferably, a through hole for one end of the rotating shaft 12 to pass through is provided at the central position of the bearing seat 13, which is convenient for connecting one end of the rotating shaft 12 to the rotor assembly 11; at least one notch is provided at the periphery of the bearing seat 30, and a convex block corresponding to the notch is provided at the corresponding position on the inner wall of the compound gear ring 21, which is convenient for the assembly and positioning between the bearing seat 30 and the compound gear ring 21.

[0072] An alternative implementation, as Figure 5As shown, at least one groove 224 is provided on one side of the moving valve member 22 facing the fixed valve member 23, and the projection of the groove 224 and the moving valve member passage on the abutting surface of the moving valve member 22 and the fixed valve member 23 does not coincide. The moving valve member 22 and the fixed valve member 23 abut against each other. When the moving valve member 22 rotates from the first position to the second position or from the second position to the first position, there will be relatively large friction on the abutting surface of the moving valve member 22 and the fixed valve member 23, which is not conducive to the moving valve member 22 changing its position. By providing, for example, two grooves 224 on one side of the moving valve member 22 facing the fixed valve member 23, and the projections of these two grooves 224 and the fixed valve member passage on the abutting surface of the moving valve member 22 and the fixed valve member 23 do not coincide, the contact area between the moving valve member 22 and the fixed valve member 23 can be effectively reduced, thereby reducing the frictional force on the abutting surface, facilitating the moving valve member 22 to change its position, and being able to extend the service life of the valve device.

[0073] See Figure 1 and Figure 6 For this valve device of the present embodiment, the overall structure is as follows: a rotor assembly 11 and a housing 24 are connected in sequence from top to bottom; a composite gear ring 21 is located inside the housing 24 and is threadedly connected to the housing 24 through an external thread provided on its upper part; inside the composite gear ring 21, there are a bearing seat 30, a moving valve member 22 and a fixed valve member 23 in sequence from top to bottom; there is a space for fluid to pass between the bearing seat 30 and the moving valve member 22, and the moving valve member 22 and the fixed valve member 23 abut; the upper end of the rotating shaft 12 passes through the bearing seat 30 and is connected to the rotor assembly 11, and the lower end of the rotating shaft 12 passes through the moving valve member 22 and the fixed valve member 23 in sequence and stays in the fixed valve member 23; one end of a limiting rod 13 is inserted into the rotating shaft 12, and the remaining part of the limiting rod 13 is connected to the moving valve member 22 through a strip-shaped groove 225 and a clamping groove 226 respectively.

[0074] The specific working mode of the valve device in this embodiment is as follows: The rotor assembly 11 rotates, driving the rotating shaft 12 to rotate. Under the action of the rotating shaft 12, the limiting rod 13 drives the moving valve member 22 to rotate synchronously. When the rotating shaft 12 rotates to the maximum angle, that is, when the limiting rod 13 is blocked by the first stop wall 311 of the fixed limiting portion 31 and cannot rotate further, the moving valve member 22 rotates from the first position to the second position. Similarly, when the rotor assembly 11 rotates in the reverse direction, driving the rotating shaft 12 to rotate in the reverse direction, under the action of the rotating shaft 12, the limiting rod 13 drives the moving valve member 22 to rotate synchronously. When the rotating shaft 12 rotates to the maximum angle, that is, when the limiting rod 13 is blocked by the second stop wall 312 of the fixed limiting portion 31 and cannot rotate further, the moving valve member 22 rotates from the second position to the first position. When the moving valve member 22 is in the first position, the first fluid port 241 is sequentially connected to the third fluid port through the communication hole 211, the first moving valve member passage 221, and the first fixed valve member passage 231 (not shown in the figure), and the second fluid port 242 is sequentially connected to the fourth fluid port through the second fixed valve member passage 232, the second moving valve member passage 222, and the third fixed valve member passage 233 (not shown in the figure); when the moving valve member 22 is in the second position, the first fluid port 241 is sequentially connected to the second fluid port 242 through the communication hole 211, the first moving valve member passage 221, and the second fixed valve member passage 232, and the third fluid port (not shown in the figure) is sequentially connected to the fourth fluid port through the first fixed valve member passage 231, the second moving valve member passage 222, and the third fixed valve member passage 233 (not shown in the figure).

[0075] Embodiment Two

[0076] The difference between Embodiment Two and Embodiment One is that in Embodiment One, the limiting rod 13 is provided only on one side of the rotating shaft 12, while in Embodiment Two, the limiting rod 13 penetrates through the rotating shaft 12.

[0077] Specifically, as Figures 7 to 9 shown, the limiting rod 13 penetrates through the rotating shaft 12 along the radial direction of the rotating shaft 12, and the limiting abutting portion 133 and the moving valve member connecting portion 132 are located on opposite sides of the rotating shaft 12. As Figure 9 and Figure 10 shown, a radial through hole is provided on the rotating shaft 12, and the limiting rod 13 passes through this radial through hole. Thus, the limiting abutting portion 133 and the moving valve member connecting portion 132 are respectively formed at both ends of the limiting rod 13 exposed outside the rotating shaft 12.

[0078] Furthermore, the fixed limiting portion 31 is provided on the bearing seat 30 and is located on the side of the bearing seat 30 facing the limiting rod 13. Preferably, the bearing seat 30 and the composite gear ring 21 can be integrally formed or can be formed independently of each other.

[0079] The fixed limiting part 31 includes a first stop wall 311 and a second stop wall 312. The first stop wall 311 and the second stop wall 312 are arranged at an angle and intersect with the rotation plane of the limiting rod 13 to limit the rotation range of the limiting rod 13. The included angle between the first stop wall 311 and the second stop wall 312 can be 60°, 90° or 120°.

[0080] As Figure 8 shown, the first stop wall 311 and the second stop wall 312 are arranged in a "V" shape on the bearing seat 30 and are not connected to each other. Different from the first embodiment, the two stop walls are directly connected (as Figure 4 shown). The limiting abutting part 133 of the limiting rod 13 rotates within the area defined by the first stop wall 311 and the second stop wall 312. When the limiting abutting part 133 abuts against the first stop wall 311, it corresponds to the first position of the moving valve member 22; when the limiting abutting part 133 abuts against the second stop wall 312, it corresponds to the second position of the moving valve member 22. The angle between the first stop wall 311 and the second stop wall 312 can be determined according to the corresponding position relationship between multiple moving valve member channels and multiple fixed valve member channels, as long as it is ensured that when the moving valve member 22 is in the first position or the second position, the corresponding fixed valve member channel and the moving valve member channel can be accurately connected.

[0081] Embodiment Three

[0082] The difference between Embodiment Three and Embodiment Two is that in Embodiment Two, the limiting rod 13 is a rod that integrates the driving function and the limiting function, while in Embodiment Three, the limiting rod 13 and the transmission rod 14 are separately arranged on both sides of the rotating shaft 12. The limiting rod 13 is used for limiting, and the transmission rod 14 is used to drive the moving valve member 22 to rotate.

[0083] Specifically, as Figure 11 and Figure 12 shown, the rotating shaft 12 provided in this embodiment is respectively provided with a transmission rod 14 and a limiting rod 13; wherein, one end of the transmission rod 14 (i.e., the driving connection part 131) is connected to the rotating shaft 12 so that the transmission rod 14 is driven to rotate by the rotating shaft 12; the other end of the transmission rod 14 (i.e., the moving valve member connection part 132) is connected to the moving valve member 22 to drive the moving valve member 22 to rotate when the transmission rod 14 is driven to rotate; one end of the limiting rod 13 (i.e., the limiting connection part 134) is connected to the rotating shaft 12 so that the limiting rod 13 is driven to rotate by the rotating shaft 12; the other end of the limiting rod 13 (i.e., the limiting abutting part 133) abuts against a fixed limiting part 31 when the rotating shaft 12 rotates to the maximum angle.

[0084] Preferably, the rotation planes of the transmission rod 14 and the limiting rod 13 are parallel or coplanar, and the transmission rod 14 and the limiting rod 13 are arranged at an angle. Among them, the included angle between the transmission rod 14 and the limiting rod 13 can be 180°.

[0085] In the specification provided herein, a large number of specific details are set forth. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0086] In addition, those of ordinary skill in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features of different embodiments are meant to be within the scope of the present invention and form different embodiments.

[0087] Those skilled in the art should understand that although the present invention has been described with reference to exemplary embodiments, various changes can be made and elements thereof can be replaced with equivalents without departing from the scope of the present invention. In addition, many modifications can be made to adapt a particular situation or material to the teachings of the present invention without departing from the essential scope thereof.

Claims

1. A valve device comprising: a housing comprising at least one fluid inlet and at least one fluid outlet; a fixed valve member disposed in the housing, the fixed valve member comprising at least one fixed valve member channel; a movable valve member disposed in the housing, the movable valve member including at least one movable valve member channel, and configured to be driven by a rotating shaft to rotate about an axis so that the at least one fixed valve member channel cooperates with the at least one movable valve member channel to form a fluid channel between at least one of the fluid inlets and at least one of the fluid outlets; a driving unit configured to drive the rotating shaft to rotate; It is characterized in that a limiting rod is provided on the rotating shaft, and the limiting rod comprises: a driving connection portion, the driving connection portion being connected to the rotating shaft so as to drive the limiting rod to rotate; a movable valve member connecting portion, the movable valve member connecting portion being connected to the movable valve member so as to drive the movable valve member to rotate when the limiting rod is driven to rotate; The position-limiting abutting portion abuts against a fixed position-limiting portion when the rotating shaft rotates to a maximum angle.

2. The valve device according to claim 1, characterized in that: A space is defined between the movable valve member and the driving unit, at least one of the fluid inlet and the fluid outlet is in communication with the space, and the rotating shaft is located in the space.

3. The valve device according to claim 2, characterized in that: The driving connection portion is located on the axis, and the position-limiting abutting portion is located between the driving connection portion and the movable valve member connection portion.

4. The valve device according to claim 3, characterized in that: A connecting boss is provided on one side of the movable valve member close to the limiting rod, and the connecting boss is located on the outer periphery of the movable valve member away from its rotation center. Part of the connecting boss is recessed inward to form a slot matching the connecting portion of the movable valve member.

5. The valve device according to claim 4, characterized in that: A strip groove adapted to the limiting abutment portion is further provided on one side of the movable valve member close to the limiting rod, and the strip groove is communicated with the clamping groove.

6. The valve device according to claim 2, characterized in that: The projection of the movable valve member in the axial direction is a circle, and the rotation axis at least partially extends along the radial direction of the circle.

7. The valve device according to claim 6, characterized in that: The fixed limiting portion has a first stop wall and a second stop wall extending along the radial direction. The first stop wall and the second stop wall are arranged at an angle and intersect with the rotation plane of the limiting rod to limit the rotation range of the limiting rod.

8. The valve device according to claim 1, wherein: The rotating shaft is extended along its radial direction to form a clamping portion, which is located on a side of the movable valve member away from the fixed valve member and restricts the movable valve member from moving in a direction away from the fixed valve member.

9. The valve device according to claim 8, characterized in that: A corrugated spring is provided at the abutting position between the clamping portion and the movable valve member to apply an elastic force to press the movable valve member toward the fixed valve member.

10. The valve device according to claim 8, characterized in that: At least one groove is provided on a side of the movable valve member facing the fixed valve member, and the groove and the projection of the movable valve member channel on the abutting surface of the movable valve member and the fixed valve member do not overlap.

11. The valve device according to claim 2, characterized in that: The limiting rod is arranged to penetrate the rotating shaft along the radial direction of the rotating shaft, and the limiting abutting portion and the movable valve member connecting portion are located on two opposite sides of the rotating shaft.

12. The valve device according to claim 7, characterized in that: The movable valve member, the bearing seat and the composite gear ring together form the space; wherein the composite gear ring is a cylindrical member, the output end of the drive unit extends through the opening of the composite gear ring to the interior of the composite gear ring, and the bearing seat is located inside the composite gear ring; The fixed limiting portion is provided on the bearing seat and is located on a side of the bearing seat facing the limiting rod; the bearing seat and the composite gear ring are integrally formed.

13. A valve device comprising: a housing comprising at least one fluid inlet and at least one fluid outlet; a fixed valve member disposed in the housing, the fixed valve member comprising at least one fixed valve member channel; a movable valve member disposed in the housing, the movable valve member including at least one movable valve member channel, and configured to be driven by a rotating shaft to rotate about an axis so that the at least one fixed valve member channel cooperates with the at least one movable valve member channel to form a fluid channel between at least one of the fluid inlets and at least one of the fluid outlets; a driving unit configured to drive the rotating shaft to rotate; Characterized in that the valve device further comprises: a transmission rod, one end of which is connected to the rotating shaft so that the transmission rod is driven to rotate by the rotating shaft; and the other end of which is connected to the movable valve member so as to drive the movable valve member to rotate when the transmission rod is driven to rotate; A limiting rod, one end of which is connected to the rotating shaft so that the limiting rod is driven to rotate by the rotating shaft; the other end of the limiting rod abuts against a fixed limiting portion when the rotating shaft rotates to a maximum angle.

14. The valve device according to claim 13, characterized in that: The rotation planes of the transmission rod and the limiting rod are parallel or coplanar, and the transmission rod and the limiting rod are arranged at an angle.

15. The valve device according to claim 14, characterized in that: The included angle between the transmission rod and the limiting rod is 180°.

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