Valve assembly

Abstract

The valve assembly comprises a valve body, a valve element assembly and a sealing assembly, the valve body is provided with a valve cavity, the valve body comprises a first bottom wall part, the first bottom wall part forms a partial wall part of the valve cavity, the first bottom wall part is provided with at least two communicating channels, at least part of the valve element assembly is located in the valve cavity, and the sealing assembly comprises a sealing seat which is arranged in the axial direction of the valve assembly. The sealing seat abuts against the valve element assembly, the sealing seat is provided with at least two first hole channels, and the first hole channels correspondingly communicate with the communicating channel; therefore, the number of parts of the valve assembly is reduced, and the structure of the valve assembly is simplified.

Description

Technical Field

[0001] The present invention relates to the field of fluid control, and in particular to a valve 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, which is beneficial to reducing the number of parts of the valve assembly and simplifying the structure of the valve assembly.

[0004] An embodiment of the present invention provides a valve assembly, which includes a valve body, a valve core assembly and a sealing assembly. The valve assembly has a valve cavity, the valve body includes a first bottom wall portion, the first bottom wall portion forms at least a portion of the wall portion of the valve cavity, at least two communicating channels are located in the first bottom wall portion, at least a portion of the valve core assembly is located in the valve cavity, the sealing assembly includes a sealing seat, and the sealing seat abuts against the valve core assembly along the axial direction of the valve assembly. The sealing seat has at least two first channels, at least two of the first channels are located on the same sealing seat, and the first channels are correspondingly connected to the communicating channels.

[0005] According to the valve assembly provided by an embodiment of the present invention, at least two communicating channels are located in the first bottom wall portion of the valve body, and the sealing assembly includes a sealing seat. By setting the sealing seat to abut against the valve core assembly, the sealing performance of the valve assembly can be achieved. Furthermore, by setting at least two first channels corresponding to the communicating channels on the sealing seat, and at least two first channels are located on the same sealing seat, compared with setting at least two sealing seats arranged side by side and each sealing seat being provided with a first channel corresponding to the communicating channels, the embodiment of the present invention facilitates reducing the number of sealing seats, simplifies the valve assembly structure and assembly steps, and is beneficial to reducing the space occupied by the sealing seat and reducing the size of the valve assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] 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;

[0007] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the fluid control assembly shown in;

[0008] Figure 3 yes Figure 2 A schematic cross-sectional view of a fluid control assembly at one position is shown in FIG;

[0009] Figure 4 yes Figure 2 A schematic cross-sectional view of a fluid control assembly at another position is shown;

[0010] Figure 5 yes Figure 2 A schematic diagram of a partially exploded structure of a valve assembly is shown in FIG;

[0011] Figure 6 yes Figure 5 A schematic front view of a partial cross-sectional structure of a valve assembly is shown in FIG;

[0012] Figure 7 yes Figure 5 A perspective schematic diagram of a partial cross-sectional structure of a valve assembly is shown in FIG;

[0013] Figure 8 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;

[0014] Figure 9 This is a schematic diagram of the three-dimensional structure of a sealing seat provided by an embodiment of the present invention at another angle;

[0015] Figure 10 is a schematic cross-sectional structural diagram of a fluid control assembly provided by another embodiment of the present invention;

[0016] Figure 11 yes Figure 10 A schematic diagram of a three-dimensional structure of an elastic member is shown in FIG;

[0017] Figure 12 yes Figure 11 Schematic diagram of the cross-sectional structure of an elastic member shown in FIG. Description of the drawings:

[0019] 1. Valve assembly; 101. Valve cavity; 10. Valve body; 11. First bottom wall; 110. Communication channel; P1. First channel; P2. Second channel; P3. Second channel; 111. Second groove; 12. First side wall; 20. Valve core assembly; 21. Conducting cavity; 22. Conducting channel; 23. First valve core; 24. Second valve core; 25. Stop block; 30. Seal assembly; 31. Seal seat; EF1. First end face; 301. First channel; 310. Protrusion; 311. First part; 312. Second part; 313. Connecting part; 314. First groove; 32. Elastic member; 321. First through hole; HO1. First hole; HO2. Second Second hole; HO3, third hole; 322, first sealing part; 323, second sealing part; 324, third sealing part; S1, arc segment; S2, first straight section; S3, second straight section; 33, connecting piece; 40, driving assembly; 411, coil assembly; 412, rotor assembly; 42, planetary gear assembly; 43, sleeve; 441, first limiter; 442, second limiter; 2, fluid control assembly; 51, housing; 510, accommodating chamber; 511, flow channel; 52, first sealing part; 521, second through hole; 53, second sealing part; 54, connecting cover; 55, driving housing; 56, control board; 61, gasket; 62, thrust bearing; 63, gasket. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figures 1 to 3 As 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.

[0022] Furthermore, if Figures 1 to 10As shown, the fluid control assembly 2 provided in the embodiment of the present invention includes a valve assembly 1, a housing 51, a first sealing member 52, and a second sealing member 53. The fluid control assembly 2 has a housing chamber 510, and at least a portion of the valve assembly 1 is located in the housing chamber 510. 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 51 has a flow channel 511, and the flow channel 511 is correspondingly connected to the communication channel 110. Specifically, the housing 51 defines at least a portion of the wall portion of the housing chamber 510, as shown in FIG. Figure 3 As shown, along the height direction of the fluid control assembly 2, the first seal 52 is located in the accommodating cavity 510 and between the valve assembly 1 and the housing 51. The first seal 52 can be used to connect the flow between the channels 110. The second seal 53 is located between the valve assembly 1 and the housing 51 to reduce or prevent the leakage of fluid in the fluid control assembly 2 to the outside. Here, the height direction of the fluid control assembly 2 and the axial direction of the valve assembly 1 are parallel or coincident.

[0023] Furthermore, an embodiment of the present invention further provides a valve assembly 1, which includes a valve body 10, a valve core assembly 20 and a sealing assembly 30. The valve assembly 1 has a valve cavity 101, the valve body 10 forms at least a portion of the wall of the valve cavity 101, and at least a portion of the valve core assembly 20 is sealed and arranged in the valve cavity 101 and can rotate relative to the valve body 10, such as Figure 3 and Figure 4 As shown, the valve body 10 includes a first bottom wall portion 11 and a first side wall portion 12. Along the height direction of the valve body 10, the first side wall portion 12 protrudes from the first bottom wall portion 11. The first bottom wall portion 11 and the first side wall portion 12 both form part of the wall portion of the valve cavity 101. At least part of the sealing assembly 30 is sealed between the first bottom wall portion 11 and the valve core assembly 20. At least part of the communication channel 110 is located in the first bottom wall portion 11. Specifically, as shown in FIG. Figure 7 As shown, the first bottom wall portion 11 defines at least a portion of the wall portion of the communication channel 110, or as shown in FIG. Figure 10 As shown, the valve assembly 1 further includes a connector 33, and a communication channel 110 is located on the connector 33. Part of the connector 33 is sleeved on the inner surface of the first bottom wall portion 11. In this case, the communication channel 110 is located inside the first bottom wall portion 11. 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.

[0024] Optionally, the extending directions of the first bottom wall portion 11 and the first side wall portion 12 are perpendicular, and at least two communicating channels 110 are located in the first bottom wall portion. For example, in some embodiments of the present invention, Figures 3 to 7As shown, the first bottom wall portion 11 has three communication channels 110. Optionally, the first bottom wall portion 11 may have two, four, five or more communication channels 110, and the first side wall portion 12 may also have a communication channel.

[0025] In order to realize the rotation of the valve core assembly 20, in some embodiments, the valve assembly 1 further includes a drive assembly 40, and the drive assembly 40 includes a first assembly and a second assembly. The first assembly includes a drive housing 55, a coil assembly 411 and a control board 56, and the second assembly includes a sleeve 43, a planetary gear assembly 42, a rotor assembly 412 and a connecting cover 54. At least part of the second assembly can be located inside the first assembly. The sleeve 43 and the connecting cover 54 are sealed. The rotor assembly 412 is arranged on the inner periphery of the sleeve 43, and the coil assembly 411 is sleeved on the outer periphery of the sleeve 43. 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 and the area where the rotor assembly 412 is located are fluidically isolated by the sleeve 43 to prevent the fluid from entering the area where the coil assembly 411 is located and causing damage to the coil assembly 411.

[0026] In this embodiment, the drive shell 55 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 55. The control board 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. The rotor assembly 412 can rotate under the action of the magnetic field, and then can transmit power to the planetary gear assembly 42, and then drive the valve core assembly 20 to rotate through the planetary gear assembly 42.

[0027] Furthermore, in an embodiment of the present invention, the sleeve 43 and the connecting cover 54 can be welded and sealed. A portion of the connecting cover 54 is located within the space defined by the sleeve 43, and the connecting cover 54 can limit or provide a transmission connection to the planetary gear assembly 42. The connecting cover 54 can be welded and sealed to the valve body 10, so that the second component, the valve body 10, the valve core assembly 20, and the sealing assembly 30 can form an actuator module. By arranging a portion of the actuator module in the accommodating cavity 510, arranging the second sealing member 53 between the actuator module and the housing 51, and sleeved the first component on the outer periphery of the actuator module, and connecting the first component to the housing 51 via fasteners, the second sealing member 53 is squeezed and deformed, thereby improving the sealing performance of the fluid control assembly 2.

[0028] Furthermore, in some embodiments, the valve assembly 1 further includes a first stopper 441 and a second stopper 442. The first stopper 441 is sleeved around 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 bonded. Along the axial direction of the valve assembly 1, the second stopper 442 is located on the side of the first stopper 441 that is closer to the valve core assembly 20. Along the axial direction of the valve assembly 1, the planetary gear assembly 42 is located between the second stopper 442 and the end of the valve core assembly 20. The second stopper 442 is capable of limiting the axial position of the planetary gear assembly 42. The planetary gear assembly 42 may include a sun gear and planetary gears. In embodiments of the present invention, the planetary gear assembly 42 may include a three-stage planetary gear. When a high-pressure refrigerant fluid such as carbon dioxide flows through the valve assembly 1, the rational configuration of the planetary gear assembly 42 facilitates improving the driving force on the valve core assembly 20. Specifically, the specific structure of the planetary gear assembly 42 can be set according to user needs, such as providing a four-stage planetary gear or a two-stage planetary gear.

[0029] To achieve the sealing performance of the valve assembly 1, in some embodiments, the sealing assembly 30 includes a sealing seat 31 and an elastic member 32. The sealing seat 31 is not elastically deformable or has a very small elastic deformation, while the elastic member 32 is elastically deformable. Along the axial direction of the valve assembly 1, the sealing seat 31 abuts against the valve core assembly 20. The elastic member 32 is located between the first bottom wall portion 11 and the sealing seat 31. 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 communicating channels 110. Optionally, the sealing seat 31 abuts against the valve core assembly 20 in a rigid manner, that is, when the sealing seat 31 abuts against the valve core assembly 20, the sealing seat 31 does not elastically deform or has very small elastic deformation.

[0030] The sealing seat 31 has at least two first channels 301 corresponding to the connecting channel 110. Specifically, the first channels 301 are connected to the connecting channel 110 one by one. Compared with setting two sealing seats and setting a first channel on each sealing seat to connect to the connecting 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.

[0031] 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 9As shown, the sealing seat 31 includes a connecting portion 313 and a raised portion 310. The raised portion 310 and the connecting portion 313 are connected as an integral structure. Along the axial direction of the sealing seat 31, the raised portion 310 protrudes from the connecting portion 313. The raised portion 310 surrounds the first channel 301. The projected area of ​​the raised portion 310 along the axial direction of the sealing seat 31 is less than or equal to the projected area of ​​the connecting portion 313. The raised portion 310 abuts against the end surface of the valve core assembly 20, and the abutment area between the raised portion 310 and the valve core assembly 20 is less than the projected area of ​​the raised portion 310 along the axial direction of the sealing seat 31. This arrangement 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.

[0032] Furthermore, if Figures 6 to 9 As shown, in some embodiments, along the axial projection of the sealing seat 31, the projected area of ​​the protrusion 310 is larger than the projected area of ​​the connecting portion 313, and a gap exists between the connecting portion 313 and the valve core assembly 20. This arrangement facilitates reducing the contact area between the sealing seat 31 and the valve core assembly 20, thereby facilitating reducing the resistance encountered by the valve core assembly 20 during rotation.

[0033] See also Figure 8 In some embodiments, the raised portion 310 includes a first portion 311 and a second portion 312 that are interconnected. The first portion 311 and the second portion 312 are integrally structured and disposed around the first channel 301. The first portion 311 defines a portion of the wall of the first channel 301, and the second portion 312 defines another portion of the wall of the first channel 301. The second portion 312 is located between two adjacent first channels 301. The radial dimension of the first portion 311 is defined as d1, and the radial dimension of the second portion 312 is defined as d2, where d2 < 2d1, and optionally, d2 = d1. With this configuration, compared to providing at least two sealing seats, each with a first channel correspondingly connected to the communication channel, the sealing seat 31 of the present embodiment facilitates reducing the size of the raised portion 310, reducing the installation space of the sealing seat 31, reducing the size of the valve assembly, or facilitating providing a greater number of first channels 301 in the sealing seat 31 with a valve assembly of the same size.

[0034] In some embodiments, combined Figures 5 to 9At least three communication channels 110 are located within the first bottom wall portion 11. The sealing seat 31 has at least three first channels 301. The communication channels 110 are connected to the first channels 301 in a one-to-one correspondence. The valve core assembly 20 can rotate within the valve cavity 101 and the valve core assembly 20 can connect at least two first channels 301. The center distance between two adjacent first channels 301 is defined as d3, and the diameter of the first channel 301 is defined as d4. d1+d4≤d3<2d1+d4. Optionally, d1+d4=d3=d2+d4. This arrangement facilitates reducing the center distance between two adjacent first channels 301 and the size of the sealing seat 31.

[0035] In specific implementation, combined with Figures 7 to 9 At least a portion of each of the three connecting passages 110 is located within the first bottom wall portion 11. These three connecting passages 110 are defined as a first passage P1, a second passage P2, and a second passage P3, arranged in a triangular pattern. The sealing seat 31 has three first passages 301, which communicate with the three connecting passages 110 in a one-to-one correspondence.

[0036] 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, welded together. The second valve core portion 24 is located on a side of the first valve core portion 23 near the first bottom wall portion 11, and the sealing seat 31 abuts against 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 jointly 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. Through the rotation of the valve core assembly 20, the conducting channel 22 can connect at least two first channels 301.

[0037] Furthermore, because the valve core assembly 20 abuts the sealing seat 31, the sealing seat 31 is susceptible to wear during the rotation of the valve core assembly 20. In some embodiments, the raised portion 310 defines at least a portion of the inner wall surface of the first channel 301, and the inner wall surface has a curved surface. The surface of the raised portion 310 facing the valve core assembly 20 is defined as the first end surface EF1, and the first end surface EF1 has a curved surface, which abuts the end surface of the valve core assembly 20. This arrangement compensates for the wear of the sealing seat 31 caused by the curved surface during the rotation of the valve core assembly 20. Under the compressive action of the elastic member 32, the sealing seat 31 maintains abutment with the valve core assembly 20, and helps reduce stress concentration.

[0038] In some embodiments, the elastic member 32 is made of EPDM (ethylene propylene diene monomer), and the sealing seat 31 is made of PEEK (polyether ether ketone). The sealing seat 31 is not easily elastically deformed. The side wall of the sealing seat 31 is clearance-matched with the inner wall of the valve body 10. Specifically, the outer wall of the connecting portion 313 is clearance-matched with the inner wall of the valve body 10, which facilitates limiting the position of the sealing seat 31 in the valve cavity 101. Furthermore, through the deformation of the elastic member 32, the elastic member 32 can adjust the axial distance between the sealing seat 31 and the first bottom wall portion 11. Through the above arrangement. This facilitates improving the sealing performance of the valve assembly 1. By providing at least two first channels 301 on a sealing seat 31 and by providing a clearance fit between the sidewall of the sealing seat 31 and the inner wall of the valve body 10, the position of the sealing seat 31 can be directly limited by the valve body 10. Compared to providing at least two independent sealing seats and requiring an additional component to limit the position of the at least two sealing seats, the embodiment of the present invention facilitates simplifying the structure of the valve assembly 1. In the embodiment of the present invention, three first channels 301 are provided on a sealing seat 31. Optionally, the number of first channels 301 provided on a sealing seat 31 can be two, four, five, or more.

[0039] Please see further Figures 3 to 10 In some embodiments, the sealing assembly 30 further includes a connector 33, which is positionally connected to the first bottom wall portion 11 and / or the sealing seat 31, and / or is positionally connected to the housing 51. The connector 33 is located on a side of the sealing seat 31 that is adjacent to the first bottom wall portion 11. 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 communicating passage 110. In this embodiment of the present invention, the number of connectors 33 is the same as the number of first passages 301. One connector 33 is sleeved within a through hole of the elastic member 32, so that the position of the elastic member 32 is limited by the connector 33.

[0040] Combine Figures 7 to 9As shown, in some embodiments, to limit the position of the connector 33, the sealing seat 31 has a first groove 314, which is recessed from the end surface of the sealing seat 31 toward the first bottom wall 11 into the interior of the sealing seat 31. The first bottom wall 11 has a second groove 111, which is recessed from the surface of the first bottom wall 11 toward the sealing seat 31 into the interior of the first bottom wall 11. Along the axial direction of the connector 33, a portion of the connector 33 is located within the first groove 314 and has a clearance fit with the wall surface of the first groove 314, thereby reducing the influence of the connector 33 on the axial position adjustment of the sealing seat 31 in the valve cavity. Another portion of the connector 33 is located within the second groove 111 and has an interference fit with the wall surface of the second groove 111, thereby facilitating the position limiting of the connector 33. In this embodiment of the present invention, the axial direction of the valve body 10 and the height direction of the valve assembly 1 are both parallel to or coincide with the axial direction of the valve core assembly 20.

[0041] Please further combine Figures 10 to 12 To further reduce the number of parts in the valve assembly 1 and simplify the structure of the valve assembly 1, the elastic member 32 has at least two first through holes 321. Projected in the axial direction of the valve assembly 1, the projection of the wall defining the first through holes 321 is located on the outer periphery of the projection of the wall defining the communication channel 110. The elastic member 32 is located between the valve core assembly 20 and the first bottom wall 11, facilitating sealing the outer periphery of the communication channel 110 via the elastic member 32. Furthermore, the elastic member 32 has at least two first through holes 321. Compared to providing at least two elastic members, each with a through hole to seal the communication 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.

[0042] In some embodiments, the elastic member 32 includes a first sealing portion 322 and a second sealing portion 323 connected as an integral structure, the first sealing portion 322 and the second sealing portion 323 surround the first through hole 321, the first sealing portion 322 defines a portion of the wall of the first through hole 321, the second sealing portion 323 defines another portion of the wall of the first through hole 321, and the second sealing portion 323 is located between two adjacent first through holes 321, and the radial dimension of the first sealing portion 322 is defined as L1, and the radial dimension of the second sealing portion 323 is defined as L2, wherein L2<2L1, optionally L2=L1. Through the above-mentioned setting, it is convenient to reduce the radial dimension of the second sealing portion 323. Compared with setting L2≥2L1, the embodiment of the present invention is conducive to reducing the stress concentration of the second sealing portion 323, improving the risk of rupture of the elastic member 32 caused by stress concentration, so that the second sealing portion 323 can have a larger deformation amount, improve the sealing performance of the elastic member 32, and further help to reduce the space occupied by the first sealing member.

[0043] In some embodiments, at least three connecting channels 110 are located on the inner side of the first bottom wall portion 11, and the elastic member 32 has at least three first through holes 321. The connecting channels 110 correspond one-to-one to the first through holes 321. The valve core assembly 20 can rotate in the valve cavity 101 and the valve core assembly 20 can connect at least two connecting channels 110. The center distance between two adjacent first through holes 321 is defined as L3, and the radius of the first through hole 321 is defined as L4, L1+L4≤L3<2L1+L4. Through the above arrangement, on the one hand, the size of the elastic member 32 can be reduced, which facilitates the arrangement of more circulation channels 110 on the inner side of the first bottom wall portion 11, which is beneficial to reducing the occupied space of the valve assembly 1. On the other hand, it is convenient to reduce the radial size of the second sealing portion 323, which is beneficial to reduce the stress concentration of the second sealing portion 323 and improve the risk of the elastic member 32 being broken due to stress concentration.

[0044] Furthermore, if Figure 11 As shown, in some embodiments, the first through hole 321 includes a first hole HO1, a second hole HO2, and a third hole HO3, which are arranged in a triangular pattern. The elastic member 32 also includes a third sealing portion 324, which defines a portion of the wall surface of the first hole HO1, the second hole HO2, and the third hole HO3, respectively. In this case, the third sealing portion 324 connects the three second sealing portions 323, defining a radial dimension of the third sealing portion 324 as L5, where L5 ≥ L1, and optionally, L5 > L1. When the elastic member 32 is squeezed, the third sealing portion 324 can be subjected to stress directed toward the center of the third sealing portion 324 by the three second sealing portions 323. This arrangement can reduce or prevent the third sealing portion 324 from bursting.

[0045] In some embodiments, along the axial projection of the elastic member 32, a portion of the projection of the first sealing portion 322 includes an arc segment S1, another portion of the projection of the first sealing portion 322 includes a first straight cylindrical segment S2, and the second sealing portion 323 includes a second straight cylindrical segment S3. The inner edge of the first straight cylindrical segment S2 can be tangent to the arc on which the inner edge of the arc segment S1 is located, and the inner edge of the second straight cylindrical segment S3 can also be tangent to the arc on which the inner edge of the arc segment S1 is located. The arc on which the inner edge of the arc segment S1 is located refers to the arc formed by extending the inner edge of the arc segment S1, and the arc coincides with the center of the inner edge of the arc segment S1 and has the same radius. The first straight cylindrical segment S2 and the second straight cylindrical segment S3 are adjacently arranged and connected. Through the above-mentioned arrangement, compared with setting the first sealing portion 322 as only an arc segment and / or setting the second sealing portion 323 as an arc segment, the stress concentration position of the elastic member 32 at the intersection of the first sealing portion 322 and the second sealing portion 323 in the embodiment of the present invention is located outside the circumferential area where the arc segment S1 is located. When the elastic member 32 is squeezed and expanded, it is convenient to expand freely in the outward direction, thereby improving the risk of the elastic member 32 being burst.

[0046] Please see further Figure 10 In some embodiments, when the sealing assembly 30 further includes a connector 33, the connector 33 is sleeved onto the inner surface of the first bottom wall 11. The connector 33 defines at least a portion of the wall of the communication passage 110. In this case, the connector 33 is positionally connected to the first bottom wall 11, the sealing seat 31, and the housing 51. The connector 33 is located on at least a portion of the side of the sealing seat 31 that is adjacent to the first bottom wall 11. The connector 33 is located on the inner circumference of the through hole of the elastic member 32. In this case, the arc segment S1 of the elastic member 32 is formed.

[0047] In a specific embodiment, the sealing seat 31 has a first groove 314, which is recessed from the end surface of the sealing seat 31 toward the first bottom wall portion 11 and into the interior of the sealing seat 31. The first bottom wall portion 11 has a through hole, and the housing 51 has a groove. Along the axial direction of the connector 33, a portion of the connector 33 is located within the first groove 314 and has a clearance fit with the wall surface of the first groove 314. Another portion of the connector 33 is located within the through hole of the first bottom wall portion 11 and has an interference fit with the wall surface defining the through hole. Another portion of the connector 33 is located within the groove of the housing 51. Optionally, the first sealing member 52 can be sleeved on the outer surface of the connector 33 to facilitate positioning of the first sealing member 52.

[0048] Further, combined with Figures 1 to 12 , the valve assembly 1 of the embodiment of the present invention has at least one of the first configuration and the second configuration:

[0049] In the first configuration of the valve assembly 1, the sealing seat 31 abuts the connecting member 33, and the compression of the elastic member 32 is less than the maximum compression of the elastic member 32. This arrangement allows the sealing assembly 30 to have good sealing performance while limiting the compression of the elastic member 32 through the connecting member 33, preventing damage to the elastic member 32 caused by prolonged maximum compression, thereby increasing the service life of the sealing assembly 30.

[0050] In some embodiments, the valve assembly 1 has a second configuration, in which a gap exists between the sealing seat 31 and the connecting member 33, and the axial dimension of the elastic member 32 in the second configuration is greater than the axial dimension of the elastic member 32 in the first configuration. Figure 7 As shown, when high-pressure fluid enters the second channel P3, it will generate an upward force along the axial direction of the valve assembly 1 on the valve core assembly 20. At this time, under the action of the elastic member 32, an axial gap is generated between the sealing seat 31 and the connecting member 33. This part of the high-pressure fluid squeezes the elastic member 32 through the above gap, so that the elastic member 32 is subjected to a force to generate a greater deformation along the axial direction of the valve assembly, and then the sealing seat 31 and the valve core assembly 20 are more tightly abutted, thereby improving the leakage of fluid from between the sealing seat 31 and the valve core assembly 20, thereby improving the sealing performance of the valve assembly.

[0051] Based on this, when high-pressure fluid enters the second passage P3, it generates an upward force on the valve core assembly 20 along the axial direction of the valve assembly 1. To reduce the impact on the rotation of the valve core assembly 20, in some embodiments, the valve assembly 1 further includes a thrust bearing 62. Along the axial direction of the valve core assembly 20, the thrust bearing 62 is located on the side of the cushion block 61 away from the first bottom wall portion 11. This arrangement can help reduce the frictional resistance encountered by the valve core assembly 20 during rotation.

[0052] In order to limit the rotational position of the valve core assembly 20 and reduce the space of the valve assembly 1, in one embodiment, the valve core assembly 20 further includes a limiting post 63, which is fixedly connected to the first valve core portion 23. For example, the limiting post 63 and the first sealing portion 23 have an interference fit or are connected or bonded by fasteners. The limiting post 63 protrudes from the first valve core portion 23 in a direction close to the cushion block 61, and the first valve core portion 23 can rotate synchronously with the limiting post 63. The cushion block 61 is provided with an arc-shaped groove on the side facing the valve core assembly 20, and the limiting post 63 is embedded in the arc-shaped groove. When the valve core assembly 20 rotates, the limiting post 63 rotates synchronously with the valve core assembly. When the limiting post 63 abuts the side wall of the arc-shaped groove, the rotational position of the valve core assembly 20 is limited.

[0053] In the fluid control assembly 2 provided in the embodiment of the present invention, since at least two communication channels 110 are located within the first bottom wall portion 11, a first sealing member 52 is disposed along the axial direction of the valve assembly 1, abutting against the first bottom wall portion 11 and the housing 51. The first sealing member 52 has at least two second through-holes 521. Projected along the axial direction of the valve assembly 1, the projection of the walls defining the second through-holes 521 is located on the outer periphery of the projection of the walls defining the communication channels 110. This arrangement facilitates sealing the fluid between the valve assembly 1 and the housing 51. Compared to providing at least two sealing members, each with a through-hole to seal the communication channels, the embodiment of the present invention facilitates reducing the number of first sealing members 52, thereby simplifying the structure and assembly steps of the fluid control assembly 2.

[0054] like Figure 10 As shown, both the first sealing member 52 and the elastic member 32 can be sleeved around the outer periphery of the connecting member 33. The structures of the first sealing member 52 and the elastic member 32 can be identical or similar. The structure of the first sealing member 52 occupies less space. When the structures of the first sealing member 52 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 sealing member 52 are identical or similar to those of the elastic member 32 provided in any of the aforementioned embodiments, and are not further described herein.

[0055] 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) comprises a valve body (10), a valve core assembly (20) and a sealing assembly (30), wherein the valve assembly (1) has a valve cavity (101) and at least two communicating channels (110), wherein the valve body (10) comprises a first bottom wall portion (11), wherein the first bottom wall portion (11) forms at least a portion of a wall portion of the valve cavity (101), and at least two communicating channels (110) are located on the first bottom wall portion (11), and at least a portion of the valve core assembly (20) is located in the valve cavity (101), and the sealing assembly (30) comprises a sealing seat (31), wherein the sealing seat (31) abuts against the valve core assembly (20) along the axial direction of the valve assembly (1), and the sealing seat (31) has at least two first channels (301), wherein the at least two first channels (301) are located on the same sealing seat (31), and the first channels (301) are correspondingly communicated with the communicating channels (110).

2. The valve assembly (1) according to claim 1, characterized in that The sealing seat (31) comprises a connecting portion (313) and a raised portion (310), wherein the raised portion (310) and the connecting portion (313) are connected to form an integral structure, and along the axial direction of the sealing seat (31), the raised portion (310) protrudes from the connecting portion (313), and the raised portion (310) surrounds the first channel (301); Along the axial projection of the sealing seat (31), the projected area of ​​the raised portion (310) is smaller than or equal to the projected area of ​​the connecting portion (313), the raised portion (310) abuts against the end face of the valve core assembly (20), and a gap exists between the connecting portion (313) and the valve core assembly (20).

3. The valve assembly (1) according to claim 2, characterized in that The protrusion (310) includes a first part (311) and a second part (312) connected to each other, wherein the first part (311) defines a portion of the wall of the first channel (301), and the second part (312) defines another portion of the wall of the first channel (301), and the second part (312) is located between two adjacent first channels (301), and the radial dimension of the first part (311) is defined as d1, and the radial dimension of the second part (312) is defined as d2, wherein d2<2d1.

4. The valve assembly (1) according to claim 3, characterized in that At least three of the communication channels (110) are located in the first bottom wall portion (11), the sealing seat (31) has at least three of the first channels (301), the communication channels (110) are connected to the first channels (301) in a one-to-one correspondence, the valve core assembly (20) is rotatable in the valve cavity (101), and the valve core assembly (20) is capable of connecting at least two of the first channels (301); The center distance between two adjacent first channels (301) is defined as d3, the diameter of the first channel (301) is defined as d4, and d1+d4≤d3<2d1+d4.

5. The valve assembly (1) according to any one of claims 2 to 4, characterized in that The raised portion (310) defines at least a portion of the inner wall surface of the first channel (301), and the inner wall surface has a curved surface; The surface of the protrusion (310) facing the valve core assembly (20) is defined as a first end surface (EF1), the first end surface (EF1) has an arc surface, and the first end surface (EF1) abuts against the end surface of the valve core assembly (20).

6. The valve assembly (1) according to any one of claims 1 to 4, characterized in that The sealing assembly (30) further comprises an elastic member (32), wherein the elastic member (32) is located between the first bottom wall portion (11) and the sealing seat (31) in the axial direction of the valve assembly (1), and a side wall surface of the sealing seat (31) is clearance-fitted with an inner wall surface of the valve body (10), and the elastic member (32) is capable of adjusting an axial distance between the sealing seat (31) and the first bottom wall portion (11); The elastic member (32) is made of EPDM rubber, and the sealing seat (31) is made of polyetheretherketone (PEEK).

7. The valve assembly (1) according to claim 6, characterized in that The sealing assembly (30) further includes a connecting member (33), the connecting member (33) defining at least a portion of a wall portion of the communicating channel (110), the connecting member (33) being positionally connected to the first bottom wall portion (11) and / or the sealing seat (31), the connecting member (33) being located on a side of at least a portion of the sealing seat (31) close to the first bottom wall portion (11), and the connecting member (33) being sleeved on an inner circumference of the elastic member (32); The valve assembly (1) has a first structure. In the first structure of the valve assembly (1), the sealing seat (31) abuts against the connecting member (33), and the compression amount of the elastic member (32) is less than the maximum compression amount of the elastic member (32).

8. The valve assembly (1) according to claim 7, characterized in that The valve assembly (1) has a second structure. In the second structure of the valve assembly (1), a gap is provided between the sealing seat (31) and the connecting member (33). The axial dimension of the elastic member (32) in the second structure is greater than the axial dimension of the elastic member (32) in the first structure.

9. The valve assembly (1) according to claim 7, characterized in that The sealing seat (31) has a first groove (314), and the first groove (314) is recessed from the end surface of the sealing seat (31) toward the first bottom wall portion (11) toward the interior of the sealing seat (31). The first bottom wall portion (11) has a second groove (111), and the second groove (111) is recessed from the surface of the first bottom wall portion (11) toward the interior of the first bottom wall portion (11) toward the interior of the first bottom wall portion (11). Along the axial direction of the connecting member (33), one part of the connecting member (33) is located in the first groove (314) and is clearance-fitted with the wall surface of the first groove (314), and the other part of the connecting member (33) is located in the second groove (111) and is interference-fitted with the wall surface of the second groove (111).

10. The valve assembly (1) according to any one of claims 1 to 9, characterized in that The valve assembly (1) further includes a drive assembly (40), wherein the drive assembly (40) includes a coil assembly (411), a rotor assembly (412), and a planetary gear assembly (42). The rotor assembly (412) can be located within the magnetic field range of the coil assembly (411) in a working state, and the rotor assembly (412) is transmission-connected to the valve core assembly (20) via the planetary gear assembly (42).

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