Valve assembly and fluid control assembly

Abstract

The invention discloses a valve assembly and a fluid control assembly, the valve assembly is provided with a valve cavity, the valve assembly comprises a valve body assembly, a valve core assembly, a bearing assembly and a limiting structure, the valve body assembly comprises a first end wall part, the first end wall part limits a partial wall part of the valve cavity, at least part of the valve core assembly is located in the valve cavity, and the valve core assembly comprises a first end part; the first end portion is close to the first end wall portion, and the bearing assembly is located between the first end portion and the first end wall portion in the axial direction of the valve assembly; the limiting structure comprises a limiting part and a matching part, the limiting part can abut against the matching part to limit the rotating angle of the valve element assembly, one of the limiting part and the matching part is arranged on the bearing assembly, and the other one of the limiting part and the matching part is arranged on the valve element assembly. Therefore, the valve assembly structure is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of fluid control, and in particular to a valve assembly and a fluid control assembly. Background Art

[0002] Typically, a valve core assembly of a valve assembly rotates under the drive of a driving member to achieve fluid control of multiple flow paths by the valve assembly. Existing valve assemblies have a complex structure, and simplifying the valve assembly structure is an urgent problem to be solved. Summary of the Invention

[0003] The object of the present invention is to provide a valve assembly and a fluid control assembly, which facilitates simplifying the structures of the valve assembly and the fluid control assembly.

[0004] On the one hand, an embodiment of the present invention provides a valve assembly, which has a valve cavity, and the valve assembly includes a valve body assembly, a valve core assembly, a bearing assembly and a limiting structure, the valve body assembly includes a first end wall portion, the first end wall portion defines a portion of the wall portion of the valve cavity, at least a portion of the valve core assembly is located in the valve cavity, the valve core assembly includes a first end portion, the first end portion is close to the first end wall portion, and along the axial direction of the valve assembly, the bearing assembly is located between the first end portion and the first end wall portion; wherein, the limiting structure includes a limiting portion and a matching portion, the limiting portion can abut against the matching portion to limit the rotation angle of the valve core assembly, one of the limiting portion and the matching portion is provided on the bearing assembly, and the other is provided on the valve core assembly.

[0005] According to the valve assembly provided in an embodiment of the present invention, the bearing assembly is arranged between the first end portion and the first end wall portion, so that the bearing assembly can withstand the axial force of the valve core assembly. Furthermore, by providing a limiting structure, it is convenient to limit the rotation angle of the valve core assembly. One of the limiting portion and the matching portion is provided on the bearing assembly, and the other is provided on the valve core assembly, which facilitates the reuse of the bearing assembly to set one of the limiting portion and the matching portion, which is beneficial to simplifying the structure of the valve assembly.

[0006] On the other hand, an embodiment of the present invention provides a fluid control component, including a shell and the above-mentioned valve assembly, the shell having a accommodating cavity and a flow channel, at least part of the valve assembly is located in the accommodating cavity, and the valve assembly and the shell are sealed, the valve assembly has a communicating channel, and the communicating channel is correspondingly connected to the flow channel.

[0007] According to the fluid control component provided by an embodiment of the present invention, the fluid control component includes a valve assembly and a housing. In the valve assembly, by arranging the bearing assembly between the first end portion and the first end wall portion, the bearing assembly can withstand the axial force of the valve core assembly. Furthermore, by setting a limiting structure, it is convenient to limit the rotation angle of the valve core assembly. One of the limiting portion and the matching portion is set on the bearing assembly, and the other is set on the valve core assembly, which facilitates the reuse of the bearing assembly to set one of the limiting portion and the matching portion, thereby simplifying the structure of the valve assembly and the fluid control assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the three-dimensional structure of a fluid control assembly provided by an embodiment of the present invention;

[0009] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the fluid control assembly shown in;

[0010] Figure 3 yes Figure 2 A schematic cross-sectional view of a fluid control assembly at one position is shown in FIG;

[0011] Figure 4 yes Figure 2 A schematic cross-sectional view of a fluid control assembly at another position is shown;

[0012] Figure 5 yes Figure 4 FIG. 1 is a schematic diagram of an enlarged structure of a fluid control component at Q1;

[0013] Figure 6 yes Figure 2 Schematic diagram of the exploded structure of a valve assembly shown in FIG;

[0014] Figure 7 yes Figure 6 A schematic front view of a cross-sectional structure of a valve assembly is shown in FIG;

[0015] Figure 8 yes Figure 6 A schematic cross-sectional view of a valve core assembly is shown in FIG;

[0016] Figure 9 yes Figure 6 A schematic diagram of a partial three-dimensional cross-sectional structure of a valve assembly is shown in FIG;

[0017] Figure 10 This is a schematic diagram of the three-dimensional structure of a sealing seat provided by an embodiment of the present invention at one angle;

[0018] Figure 11 yes Figure 6A schematic diagram of a three-dimensional structure of a valve body is shown in FIG;

[0019] Figure 12 is a schematic cross-sectional structural diagram of a fluid control assembly provided by another embodiment of the present invention;

[0020] Figure 13 yes Figure 12 A schematic diagram of the three-dimensional structure of an elastic member and a first sealing member is shown in FIG. Description of the drawings:

[0022] 1. Valve assembly; 101. Valve cavity; 10. Valve body assembly; 11. Valve body; 110. Communication passage; P1. First passage; P2. Second passage; P3. Second passage; 112. Side wall; 113. Second end wall; 111. First positioning portion; 12. Connecting cover; 120. First end wall; 121. Toothed portion; 122. Valve cavity; 123. Mounting portion; 20. Valve core assembly; 21. Conducting cavity; 22. Conducting passage; 23. First valve core; 231. Transmission portion; 24. Second valve core; 25. First end; 251. First step; 252. End face portion; 26. Second end; 30. Seal assembly; 31. Seal seat; 311. Protrusion; 312. Base; 32. Elastic member; 321. First seal Sealing part; 322, second sealing part; 33, connecting part; 34, channel; 40, control component; 411, coil assembly; 412, rotor assembly; 421, gear assembly; 422, planetary gear assembly; 43, sleeve; 441, first limiting member; 442, second limiting member; 443, input sun gear; 45, drive housing; 46, control board; 50, bearing assembly; 51, first support block; 511, main body; 512, lug; 52, supporting bearing; 53, second support block; 60, limiting structure; 61, limiting part; 611, limiting column; 62, matching part; 621, arc groove; 2, fluid control component; 70, housing; 71, accommodating chamber; 72, flow channel; 81, first sealing member; 82, second sealing member. DETAILED DESCRIPTION

[0023] The features and exemplary embodiments of various aspects of the present invention are described below. To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below with reference to the accompanying drawings and specific embodiments. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another with the same name, and do not necessarily require or imply any actual relationship or order between these components.

[0024] like Figures 1 to 4As shown, an embodiment of the present invention provides a fluid control component 2, which can be applied to a vehicle thermal management system or an air-conditioning system, and in particular can be applied to a refrigerant circulation circuit of a vehicle. Specifically, the fluid control component 2 can be used to control the on-off of the flow path in the refrigerant circulation circuit and / or adjust the flow rate of the refrigerant.

[0025] The fluid control assembly 2 provided in the embodiment of the present invention includes a valve assembly 1, a housing 70, a first sealing member 81, and a second sealing member 82. The fluid control assembly 2 has a housing chamber 71, and at least a portion of the valve assembly 1 is located in the housing chamber 71. The valve assembly 1 has a communication channel 110, and fluid can enter or leave the valve assembly 1 through the communication channel 110. Correspondingly, the housing 70 has a flow channel 72, and the flow channel 72 is correspondingly connected to the communication channel 110. Specifically, the housing 70 defines at least a portion of the wall portion of the housing chamber 71, such as Figure 3 As shown, along the height direction of the fluid control assembly 2, a first seal 81 is located within the accommodating cavity 71 and between the valve assembly 1 and the housing 70. The first seal 81 can be used to communicate cross-flow between the channels 110. A second seal 82 is located between the valve assembly 1 and the housing 70 to reduce or prevent leakage of fluid from the fluid control assembly 2 to the outside. Herein, the height direction of the fluid control assembly 2 and the axial direction of the valve assembly 1 are parallel or coincident.

[0026] Furthermore, an embodiment of the present invention also provides a valve assembly 1, which includes a valve body assembly 10, a valve core assembly 20 and a sealing assembly 30. The valve assembly 1 has a valve cavity 101, the valve body 11 forms at least a portion of the wall of the valve cavity 101, at least a portion of the valve core assembly 20 is sealed in the valve cavity 101, and the valve core assembly 20 can be rotatable relative to the valve body 11.

[0027] like Figures 3 to 7 As shown, the valve body assembly 10 includes a valve body 11 and a connecting cover 12, the connecting cover 12 and the valve body 11 are sealed and connected, and the connecting cover 12 and the valve body 11 both define a portion of the wall portion of the valve cavity 101. Specifically, the connecting cover 12 includes a first end wall portion 120, and the valve body 11 includes a second end wall portion 113 and a side wall portion 112. Along the height direction of the valve body 11, the first end wall portion 120 and the second end wall portion 113 are arranged along the height direction of the valve assembly 1, and the side wall portion 112 protrudes from the second end wall portion 113. The first end wall portion 120, the second end wall portion 113 and the side wall portion 112 all form a portion of the wall portion of the valve cavity 101, and at least a portion of the sealing assembly 30 is sealed and arranged between the second end wall portion 113 and the valve core assembly 20. At least a portion of the communicating channel 110 is located in the second end wall portion 113. Specifically, as Figure 6 and Figure 7 As shown, the second end wall portion 113 defines at least a portion of the wall portion of the communication channel 110, or as shown in FIG. Figure 12As shown, the valve assembly 1 further includes a connector 33, and the communication channel 110 is located on the connector 33. Part of the connector 33 is sleeved on the inner surface of the second end wall portion 113. In this case, the communication channel 110 is located inside the second end wall portion 113. By rotating the valve core assembly 20, at least two communication channels 110 can be connected or closed. In this context, closing a communication channel 110 means that the communication channel 110 is not connected to any other communication channels 110.

[0028] Optionally, the second end wall portion 113 and the side wall portion 112 extend in a perpendicular direction, and at least two communication channels 110 are located in the second end wall portion 113. For example, in some embodiments of the present invention, Figures 3 to 9 As shown, at least three communication channels 110 are located within the second end wall portion 113. Optionally, the second end wall portion 113 may have two, four, five, or more communication channels 110, and the side wall portion 112 may also have communication channels. In this embodiment of the present invention, all communication channels 110 may be located within the second end wall portion 113, or a portion of the communication channels 110 may be located within the second end wall portion 113, while another portion of the communication channels 110 may be located within the side wall portion 112. This description will take the example of all communication channels 110 being located within the second end wall portion 113.

[0029] In some embodiments, as Figures 3 to 7 As shown, the connection cover 12 further includes a toothed portion 121, which is integrally connected to the first end wall portion 120. A gear assembly 421 meshes with the toothed portion 121 for transmission connection, and the gear assembly 421 is in transmission connection with the valve core assembly 20. Optionally, the inner surface of the toothed portion 121 can be formed into a toothed structure through a toothing process, which meshes with the gear assembly 421 for power transmission.

[0030] The working fluid in the embodiments of the present invention can be a refrigerant, which has a relatively high pressure. In order to enable the valve core assembly 20 to rotate stably, in some embodiments, the gear assembly 421 includes at least one planetary gear assembly 422. The planetary gear assembly 422 is located in the chamber defined by the tooth-shaped portion 121, and each stage of the planetary gear assembly 422 is meshed and transmission-connected with the tooth-shaped portion 121. In the connecting cover 12, the valve cavity 101 is connected to the chamber defined by the tooth-shaped portion 121, and the last stage planetary gear assembly 422 of at least one planetary gear assembly 422 is directly transmission-connected with the valve core assembly 20. In a specific implementation, the transmission rods sleeved on each planetary gear in the last stage planetary gear assembly 422 are interference-fitted with the valve core assembly 20, thereby driving the valve core assembly 20 to rotate.

[0031] To achieve rotation of the valve core assembly 20, the valve assembly 1 further includes a sleeve 43 and a rotor assembly 412. At least a portion of the rotor assembly 412 is located on the inner surface of the sleeve 43. The rotor assembly 412 is in driving connection with the gear assembly 421. The sleeve 43 is sealed with the connection cover 12 to reduce or prevent fluid from flowing from the gap between the sleeve 43 and the connection cover 12 to the outside of the valve assembly 1. Optionally, the sleeve 43 and the connection cover 12 can be welded and sealed. A portion of the connection cover 12 is located within the space defined by the sleeve 43. The connection cover 12 can limit or provide a driving connection to the planetary gear assembly 422. The connection cover 12 can be welded and sealed to the valve body 11.

[0032] Further, combined with Figures 3 to 7 As shown, in some embodiments, the valve assembly 1 further includes a first stopper 441 and a second stopper 442. The first stopper 441 is sleeved on the inner circumference of the rotor assembly 412 and is in driving connection with the rotor assembly 412. For example, the first stopper 441 and the rotor assembly 412 are interference fit, threaded, or adhesively connected. Along the axial direction of the valve assembly 1, the second stopper 442 is located on a side of the first stopper 441 that is close to the valve core assembly 20. Along the axial direction of the valve assembly 1, the planetary gear assembly 422 is located between the second stopper 442 and the end of the valve core assembly 20. The second stopper 442 can limit the axial position of the planetary gear assembly 422.

[0033] The planetary gear assembly 422 may include a sun gear and planetary gears. In an embodiment of the present invention, the planetary gear assembly 422 may include a three-stage planetary gear. The input sun gear 443 of the primary planetary gear assembly 422 is partially sleeved on the inner circumference of the first stopper 441 and the second stopper 442, and the input sun gear 443 of the primary planetary gear assembly 422 is interference-fitted with the first stopper 441 and / or the second stopper 442. The primary planetary gear assembly 422 can transmit power step by step to the final planetary gear assembly to facilitate the transmission of driving force. When a high-pressure refrigerant fluid such as carbon dioxide flows through the valve assembly 1, the appropriate configuration of the planetary gear assembly 422 facilitates the improvement of the driving force on the valve core assembly 20. Specifically, the specific structure of the planetary gear assembly 422 can be set according to user needs, such as a three-stage planetary gear assembly, a four-stage planetary gear assembly, a two-stage planetary gear assembly, or a multi-stage planetary gear assembly.

[0034] Combine Figure 3 、 Figure 4 as well as Figure 12As shown, in some embodiments, the fluid control assembly 2 further includes a control assembly 40, which is sleeved on the outer circumference of the sleeve 43. The control assembly 40 includes a drive housing 45, a coil assembly 411, and a control board 46. The coil assembly 411 is sleeved on the outer circumference of the sleeve 43, and the rotor assembly 412 is located within the magnetic field range of the coil assembly 411 in the working state. The area where the coil assembly 411 is located is fluidically isolated from the area where the rotor assembly 412 is located by the sleeve 43 to prevent fluid from entering the area where the coil assembly 411 is located and causing damage to the coil assembly 411.

[0035] In this embodiment, the drive shell 45 can be fixed to the coil assembly 411 by injection molding or the coil assembly 411 can be limitedly set in the drive cavity of the drive shell 45. The control board 46 is electrically connected to the coil assembly 411 and controls the power on or off of the coil assembly 411. When the coil assembly 411 is energized, it can generate a magnetic field, and the rotor assembly 412 can rotate under the action of the magnetic field, which facilitates the transmission of power to the planetary gear assembly 422, and then drives the valve core assembly 20 to rotate through the planetary gear assembly 422.

[0036] In the embodiment of the present invention, when all the communication channels 110 are arranged in the second end wall portion 113, the valve core assembly 20 will generate a force along the height direction of the fluid control assembly 2 during operation. In order to ensure the stable operation of the valve core assembly 20, as shown in FIG. Figure 3 and Figure 4 As shown, in some embodiments, the valve assembly 1 further includes a bearing assembly 50, which includes a first support block 51, a second support block 53, and a support bearing 52. Along the axial direction of the bearing assembly 50, the first support block 51 is located on the side of the support bearing 52 away from the second support block 53, the second support block 53 abuts the first end wall portion 120, the first support block 51 abuts the valve core assembly 20, and the support bearing 52 abuts between the first support block 51 and the second support block 53. The provision of the first support block 51 and the second support block 53 protects the support bearing 52 and ensures normal operation.

[0037] In order to limit the rotation angle of the valve core assembly 20, Figures 3 to 9 As shown, in some embodiments, the valve assembly 1 further includes a limiting structure 60. The valve core assembly 20 includes a first end 25, which is adjacent to the first end wall 120. Along the axial direction of the valve assembly 1, the bearing assembly 50 is located between the first end 25 and the first end wall 120. The limiting structure 60 includes a limiting portion 61 and a mating portion 62. One of the limiting portion 61 and the mating portion 62 is provided on the bearing assembly 50, and the other is provided on the valve core assembly 20. This arrangement facilitates the reuse of either the limiting portion or the mating portion of the bearing assembly, thereby simplifying the structure of the valve assembly.

[0038] In some embodiments, the limiting portion 61 includes a limiting post 611, and the mating portion 62 includes an arc-segment groove 621. The limiting post 611 is partially embedded in the arc-segment groove 621. Along the circumference of the valve core assembly 20, the limiting post 611 can abut against the circumferential end wall of the arc-segment groove 621, thereby limiting the rotation angle of the valve core assembly 20. One of the bearing assembly 50 and the valve core assembly 20 is integrally structured or fixedly connected to the limiting post 611, and the other of the bearing assembly 50 and the valve core assembly 20 has the arc-segment groove 621.

[0039] In some embodiments, the bearing assembly 50 includes a first support block 51 and a supporting bearing 52. Along the axial direction of the valve assembly 1, the first support block 51 abuts against the valve body assembly 10, and the supporting bearing 52 is abutted on the side of the first support block 51 away from the first end 25. One of the limiting portion 61 and the mating portion 62 is arranged on the first support block 51.

[0040] And / or, the bearing assembly 50 further includes a second support block 53 and a support bearing 52 . Along the axial direction of the valve assembly 1 , the second support block 53 is located on the side of the support bearing 52 away from the first support block 51 , and the second support block 53 abuts against the first end wall portion 120 .

[0041] In this embodiment of the present invention, the limiting post 611 is a shaft structure. The limiting post 611 and the valve core assembly 20 have an interference fit, so that the limiting post 611 and the valve core assembly 20 are fixed, and the limiting post 611 and the valve core assembly 20 rotate synchronously. The arc groove 621 is located in the first support block 51. At least a portion of the limiting post 611 is embedded in the arc groove 621 and can rotate within the arc groove 621. With this arrangement, the limiting structure 60 can be positioned near the first end wall portion 120, facilitating the provision of a larger number of flow channels 110 inside the second end wall portion 113.

[0042] In a specific implementation, the support bearing 52 comprises a thrust bearing, and the bearing assembly 50 is located on a side of the valve core assembly 20 that is at least partially away from the second end wall portion 113. This arrangement reduces frictional resistance experienced by the valve core assembly 20 during rotation, and the thrust bearing's compact size facilitates a compact design for the valve assembly 1. During operation of the valve assembly 1, high-pressure fluid flows through the valve core assembly 20, generating a significant axial thrust on the valve core assembly. This, under the restraint and protection of the bearing assembly 50, alleviates the possibility of valve core assembly 20 stalling.

[0043] In some embodiments, the bearing assembly 50 includes a first support block 51 having an arc-shaped groove 621. The limiting portion 61 includes a limiting post 611. The limiting post 611 has an interference fit with the valve core assembly 20 and is protruding from the first end portion 25. The diameter of the limiting post 611 is less than or equal to the radial width of the arc-shaped groove 621. This arrangement helps reduce the resistance encountered by the valve core assembly 20 during rotation.

[0044] In order to limit the axial position of the bearing assembly 50 in the valve assembly 1, in some embodiments, Figures 3 to 12 As shown, the side wall portion 112 of the valve body 11 includes a first positioning portion 111 , and the first support block 51 abuts against the first positioning portion 111 .

[0045] In some embodiments, combined Figure 6 and Figure 11 The first support block 51 includes a main body 511 and at least two lugs 512. The lugs 512 protrude from the main body 511 along the radial direction of the first support block 51. The number of the first positioning portions 111 is greater than or equal to the number of at least two lugs 512. At least part of the lugs 512 is located within the first positioning portion 111, and the lugs 512 abut against the bottom wall of the first positioning portion 111. Through the above arrangement, on the one hand, the axial position of the first support block 51 can be limited. On the other hand, by providing the lugs 512 and the first positioning portion 111, the rotation of the first support block 51 can be restricted, so that the first support block 51 can better limit the rotation position of the valve core assembly 20.

[0046] In some embodiments, the second end wall portion 113 has at least two connecting channels 110, and the valve core assembly 20 is capable of connecting at least two connecting channels 110. The valve core assembly 20 also includes a second end portion 26, and the first end portion 25 and the second end portion 26 are arranged along the axial direction of the valve core assembly 20. The valve assembly 1 also includes a sealing assembly 30. Along the axial direction of the valve assembly 1, the sealing assembly 30 is located between the second end wall portion 113 and the second end portion 26 of the valve core assembly 20. The sealing assembly 30 has at least two channels 34, and the channels 34 are correspondingly connected to the connecting channels 110.

[0047] In some embodiments, the sealing assembly 30 includes an elastic member 32. Along the axial direction of the valve assembly 1, the elastic member 32 is located between the second end wall portion 113 and the second end portion 26. The first end portion 25 includes a first step portion 251 and an end face portion 252. The first step portion 251 protrudes from the end face portion 252. The first support block 51 abuts against the first step portion 251, and an axial gap is provided between the first support blocks 51. One of the limiting portion 61 and the mating portion 62 is provided on the end face portion 252. Through this arrangement, the elastic force of the elastic member 32 can cause the first step portion 251 to abut against the first support block 51, thereby reducing the frictional resistance encountered by the valve core assembly 20 during rotation.

[0048] In some embodiments, the sealing assembly 30 further includes a sealing seat 31. Along the axial direction of the valve assembly 1, the sealing seat 31 is located between the elastic member 32 and the second end portion 26, and a portion of the end surface of the sealing seat 31 facing the valve core assembly 20 abuts against the second end portion 26. Through the elastic deformation of the elastic member 32, the sealing seat 31 abuts against the valve core assembly 20, thereby facilitating the sealing of the valve assembly 1 and reducing or preventing cross-flow between the connecting channels 110. Furthermore, an axial gap is provided between another portion of the end surface of the sealing seat 31 facing the valve core assembly 20 and the second end portion 26, thereby facilitating the reduction of the abutment area between the sealing seat 31 and the valve core assembly 20. Furthermore, the clearance between the valve core assembly 20 and the side wall portion 112 is adapted to reduce the frictional resistance encountered by the valve core assembly 20 during rotation.

[0049] Please see further Figure 7 To facilitate installation of the valve assembly 1 within the accommodating cavity 71 of the housing 70, in some embodiments, the outer surface of the valve cavity portion 122 further includes a mounting portion 123, which can be removably connected to the housing 70 outside the valve assembly 1. Optionally, the mounting portion 123 can be threadedly connected to the housing 70 outside the valve assembly 1. Along the height direction of the fluid control assembly 2, the second sealing member 82 is sandwiched between the end surface of the connecting cover 12 and the housing 70. The second sealing member 82 is clamped by the removable connection between the mounting portion 123 and the housing 70 outside the valve assembly 1, thereby facilitating a seal between the connecting cover 12 and the housing 70.

[0050] like Figure 9 and Figure 10 As shown, the sealing seat 31 has at least two through holes corresponding to the communicating channel 110. Specifically, the through holes are connected to the communicating channel 110 one by one. Compared with setting two sealing seats and setting a first channel on each sealing seat to connect to the communicating channel, the embodiment of the present invention can set at least two first channels on one sealing seat 31, which is convenient for reducing the number of sealing seats 31 and simplifying the valve component structure and assembly steps.

[0051] Since the sealing seat 31 abuts against the bottom wall of the valve core assembly 20, the sealing assembly 30 generates resistance to the rotation of the valve core assembly 20. In order to improve the stability of the operation of the valve core assembly 20 and reduce the operation resistance of the valve core assembly 20, in some embodiments, combined with Figures 5 to 10 As shown, the sealing seat 31 includes a base portion 312 and a raised portion 311. The raised portion 311 and the base portion 312 are connected as an integral structure. Along the axial direction of the sealing seat 31, the raised portion 311 protrudes from the base portion 312. The raised portion 311 surrounds the through hole. The projected area of ​​the raised portion 311 along the axial direction of the sealing seat 31 is less than or equal to the projected area of ​​the base portion 312. The raised portion 311 abuts the end surface of the valve core assembly 20, and the abutment area between the raised portion 311 and the valve core assembly 20 is less than the projected area of ​​the raised portion 311 along the axial direction of the sealing seat 31. This configuration facilitates reducing the contact area between the sealing seat 31 and the valve core assembly 20, thereby reducing the rotational resistance of the valve core assembly 20.

[0052] Further, if Figure 9 and Figure 10 As shown, in some embodiments, along the axial projection of the sealing seat 31, the projected area of ​​the protrusion 311 is larger than the projected area of ​​the base portion 312, and a gap exists between the base portion 312 and the valve core assembly 20. This arrangement reduces the contact area between the sealing seat 31 and the valve core assembly 20, thereby reducing the resistance encountered by the valve core assembly 20 during rotation.

[0053] In specific implementation, combined with Figures 4 to 7 、 Figure 9 and Figure 10 At least a portion of each of the three communication channels 110 is located within the second end wall portion 113. These three communication channels 110 are defined as a first channel P1, a second channel P2, and a second channel P3, respectively. The first channel P1, the second channel P2, and the second channel P3 are arranged in a triangular pattern. The sealing seat 31 has three through-holes, each corresponding to one of the three communication channels 110.

[0054] Alternatively, as Figure 13 As shown, the elastic member 32 has at least two channels. The at least two channels are located on the same elastic member 32. When projected axially toward the valve assembly 1, the projection of the wall portion defining the channel is located on the outer periphery of the projection of the wall portion defining the communicating channel 110. The elastic member 32 is located between the valve core assembly 20 and the second end wall portion 113, facilitating sealing the outer periphery of the communicating channel 110 via the elastic member 32. Furthermore, the elastic member 32 has at least two channels. Compared to providing at least two elastic members, each with a through hole to seal the communicating channel, this embodiment of the present invention facilitates reducing the number of elastic members, simplifying the valve assembly structure and assembly steps, and helping to reduce the space occupied by the sealing seat 31, thereby reducing the size of the valve assembly 1.

[0055] In some embodiments, the elastic member 32 includes a first sealing portion 321 and a second sealing portion 322 connected as an integral structure, the first sealing portion 321 and the second sealing portion 322 surround the channel 321, the first sealing portion 321 defines a portion of the wall of the channel 321, the second sealing portion 322 defines another portion of the wall of the channel 321, and the second sealing portion 322 is located between two adjacent channels 321. The radial dimension of the first sealing portion 321 is defined as L1, and the radial dimension of the second sealing portion 322 is defined as L2, wherein L2<2L1, and optionally L2=L1. Through the above-mentioned setting, it is convenient to reduce the radial dimension of the second sealing portion 322. Compared with setting L2≥2L1, the embodiment of the present invention is conducive to reducing the stress concentration of the second sealing portion 322, improving the risk of rupture of the elastic member 32 caused by stress concentration, allowing the second sealing portion 322 to have a larger deformation amount, improving the sealing performance of the elastic member 32, and further helping to reduce the space occupied by the first sealing member.

[0056] Furthermore, the valve core assembly 20 includes a first valve core portion 23 and a second valve core portion 24. The first valve core portion 23 and the second valve core portion 24 are sealed together, for example, by welding. The second valve core portion 24 is located on a side of the first valve core portion 23 near the second end wall portion 113, and the sealing seat 31 abuts the second valve core portion 24. The valve core assembly 20 has a conducting cavity 21 and a conducting channel 22. The first valve core portion 23 and the second valve core portion 24 together define at least a portion of the wall of the conducting cavity 21. The conducting channel 22 is located in the second valve core portion 24. There can be at least two conducting channels 22. Rotation of the valve core assembly 20 allows the conducting channels 22 to connect at least two channels 34. The first end portion 25 is located in the first valve core portion 23, and the second end portion 26 is located in the second valve core portion 24. To enable rotation of the valve core assembly 20, the first valve core portion 23 also includes a transmission portion 231, which is in driving connection with the gear assembly 421.

[0057] In some embodiments, the elastic member 32 is formed of EPDM (ethylene propylene diene monomer), and the sealing seat 31 is formed of PEEK (polyether ether ketone). A clearance fit is formed between the sidewall of the sealing seat 31 and the inner wall of the valve body 11. Specifically, a clearance fit is formed between the outer wall of the base portion 312 and the inner wall of the valve body 11. This facilitates limiting the position of the sealing seat 31 within the valve cavity 101. Furthermore, deformation of the elastic member 32 allows the elastic member 32 to adjust the axial distance between the sealing seat 31 and the second end wall 113. Through the above arrangement. It is convenient to improve the sealing performance of the valve assembly 1, and by setting at least two through holes on a sealing seat 31, and by the clearance between the side wall surface of the sealing seat 31 and the inner wall surface of the valve body 11, it is convenient to directly limit the position of the sealing seat 31 through the valve body 11. Compared with setting three independent sealing seats and requiring another component to limit the three sealing seats, the embodiment of the present invention is conducive to simplifying the structure of the valve assembly 1.

[0058] Please see further Figures 3 to 11 In some embodiments, the sealing assembly 30 further includes a connector 33, which is positionally connected to the second end wall portion 113 and / or the sealing seat 31, and / or is positionally connected to the housing 70. The connector 33 is located on a side of the sealing seat 31 adjacent to the second end wall portion 113. The connector 33 is sleeved around the inner circumference of the elastic member 32, and defines at least a portion of the wall of the communication passage 110. In this embodiment of the present invention, the number of connectors 33 is the same as the number of through-holes. One connector 33 is sleeved within one through-hole of the elastic member 32, so that the position of the elastic member 32 is limited by the connector 33.

[0059] like Figure 12 As shown, both the first seal 81 and the elastic member 32 can be sleeved around the outer periphery of the connector 33. The structures of the first seal 81 and the elastic member 32 can be identical or similar. The structure of the first seal 81 occupies less space. When the structures of the first seal 81 and the elastic member 32 are identical, the number of parts in the fluid control assembly 2 can be reduced, thereby simplifying the structure of the fluid control assembly 2. The structure and dimensions of the first seal 81 are identical or similar to those of the elastic member 32 provided in any of the aforementioned embodiments, and are not further described herein.

[0060] In summary, according to the valve assembly 1 and the fluid control assembly 2 provided in the embodiment of the present invention, by setting the bearing assembly 50 between the first end portion 25 and the first end wall portion 120, the bearing assembly 50 is able to withstand the axial force of the valve core assembly 20. Furthermore, by setting a limiting structure 60, it is convenient to limit the rotation angle of the valve core assembly. One of the limiting portion and the matching portion is set on the bearing assembly, and the other is set on the valve core assembly 20, which is convenient for reusing the bearing assembly 50 to set one of the limiting portion 61 and the matching portion 62, which is beneficial to simplify the structure of the valve assembly 1.

[0061] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. For example, with respect to the directional definitions of “front”, “back”, “left”, “right”, “up” and “down”, although this specification has described the present invention with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified, combined or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A valve assembly (1), characterized in that: The valve assembly (1) has a valve cavity (101), the valve assembly (1) includes a valve body assembly (10), a valve core assembly (20), a bearing assembly (50) and a limiting structure (60), the valve body assembly (10) includes a first end wall portion (120), the first end wall portion (120) defines a portion of the wall portion of the valve cavity (101), at least a portion of the valve core assembly (20) is located in the valve cavity (101), the valve core assembly (20) includes a first end portion (25), the first end portion (25) is close to the first end wall portion (120), and along the axial direction of the valve assembly (1), the bearing assembly (50) is located between the first end portion (25) and the first end wall portion (120); The limiting structure (60) includes a limiting portion (61) and a matching portion (62), wherein the limiting portion (61) can abut against the matching portion (62) to limit the rotation angle of the valve core assembly (20), and one of the limiting portion (61) and the matching portion (62) is arranged on the bearing assembly (50), and the other is arranged on the valve core assembly (20).

2. The valve assembly (1) according to claim 1, characterized in that The limiting portion (61) includes a limiting post (611), and the matching portion (62) includes an arc segment groove (621). A portion of the limiting post (611) is embedded in the arc segment groove (621). Along the circumferential direction of the valve core assembly (20), the limiting post (611) can abut against the circumferential end wall of the arc segment groove (621); The bearing assembly (50) includes a first support block (51), wherein the first support block (51) and one of the valve core assembly (20) are integrally structured or fixedly connected to the limiting column (611), and the other of the first support block (51) and the valve core assembly (20) has the arc segment groove (621).

3. The valve assembly (1) according to claim 2, characterized in that The bearing assembly (50) further comprises a supporting bearing (52), wherein the first supporting block (51) abuts against the valve body assembly (10) along the axial direction of the valve assembly (1), the supporting bearing (52) is abutted against a side of the first supporting block (51) away from the first end portion (25), and one of the limiting portion (61) and the matching portion (62) is provided on the first supporting block (51); And / or, the bearing assembly (50) further includes a second support block (53), and along the axial direction of the valve assembly (1), the second support block (53) is located on a side of the first support block (51) close to the first end wall portion (120), and the second support block (53) abuts against the first end wall portion (120).

4. The valve assembly (1) according to claim 3, characterized in that The first support block (51) has an arc segment groove (621), and the limiting portion (61) includes a limiting column (611), the limiting column (611) is interference fit with the valve core assembly (20), and the limiting column (611) is protruded from the first end portion (25), and the diameter of the limiting column (611) is less than or equal to the radial width of the arc segment groove (621).

5. The valve assembly (1) according to claim 3, characterized in that The valve body assembly (10) includes a valve body (11), the valve body (11) includes a side wall portion (112), the side wall portion (112) includes a first positioning portion (111), and the first support block (51) abuts against the first positioning portion (111).

6. The valve assembly (1) according to claim 5, characterized in that The first support block (51) comprises a main body (511) and at least two lugs (512), and along the radial direction of the first support block (51), the lugs (512) protrude from the main body (511); The number of the first positioning portions (111) is greater than or equal to the number of the at least two lug portions (512), at least part of the lug portion (512) is located in the first positioning portion (111), and the lug portion (512) abuts against the bottom wall of the first positioning portion (111).

7. The valve assembly (1) according to claim 5, characterized in that The valve body (011) further includes a second end wall portion (113), the second end wall portion (113) having at least two communication channels (110), the valve core assembly (20) is capable of connecting the at least two communication channels (110), the valve core assembly (20) further includes a second end portion (26), the first end portion (25) and the second end portion (26) are arranged along the axial direction of the valve core assembly (20); The valve assembly (1) further comprises a sealing assembly (30), which is located between the second end wall portion (113) and the second end portion (26) of the valve core assembly (20) along the axial direction of the valve assembly (1), and the sealing assembly (30) has at least two channels (34), and the channels (34) are correspondingly connected to the connecting channel (110).

8. The valve assembly (1) according to claim 7, characterized in that The sealing assembly (30) comprises an elastic member (32), and along the axial direction of the valve assembly (1), the elastic member (32) is located between the second end wall portion (113) and the second end portion (26); The first end portion (25) includes a first step portion (251) and an end face portion (252), the first step portion (251) protrudes from the end face portion (252), the first support block (51) abuts against the first step portion (251), and an axial gap is provided between the first support block (51) and the first support block (51), and one of the limiting portion (61) and the matching portion (62) is provided on the end face portion (252).

9. The valve assembly (1) according to claim 8, characterized in that The sealing assembly (30) further includes a sealing seat (31), which is located between the elastic member (32) and the second end portion (26) along the axial direction of the valve assembly (1), and a portion of the end surface of the sealing seat (31) facing the valve core assembly (20) abuts against the second end portion (26), and an axial gap is formed between another portion of the end surface of the sealing seat (31) facing the valve core assembly (20) and the second end portion (26).

10. A fluid control assembly (2), characterized in that: The invention comprises a housing (70) and a valve assembly (1) according to any one of claims 1 to 9, wherein the housing (70) has a receiving cavity (71) and a flow channel (72), at least part of the valve assembly (1) is located in the receiving cavity (71), and a seal is provided between the valve assembly (1) and the housing (70), and the valve assembly (1) has a communicating channel (110), and the communicating channel (110) is correspondingly communicated with the flow channel (72).

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