CN116001512A - Fluid control device and thermal management system - Google Patents

Abstract

The invention discloses a fluid control device and a thermal management system, wherein the fluid control device is provided with a first cavity, the fluid control device comprises a valve body component and a valve core, the valve body component comprises a first flow channel, a second flow channel and a third flow channel, the valve core comprises a communication pore canal, a first throttling groove and a second throttling groove, one of the first flow channel and the second flow channel can be communicated with the third flow channel by the communication pore canal, the flow cross section area of the first throttling groove and the flow cross section area of the second throttling groove are smaller than the flow cross section area of the communication pore canal, and the communication pore canal comprises the first pore canal; the fluid control device is provided with a transition mode, in the transition mode, along the circumferential direction of the valve core, an opening of the first pore canal towards the direction of the valve body assembly is positioned between the first flow passage and the second flow passage, one of the first flow passage and the second flow passage is communicated with the first throttling groove, and the other is communicated with the second throttling groove; this can be advantageous in improving the susceptibility of excessive pressures in the thermal management system to damage to the compressor and/or other fluid components.

Description

Fluid control device and thermal management system

Technical Field

The invention relates to the field of fluid control, in particular to a fluid control device and a thermal management system.

Background

When the fluid control device is applied to a thermal management system, the fluid control device is commonly used for switching or throttling fluid according to different system requirements, and when a compressor or other fluid components are included in the thermal management system, the compressor and/or other fluid components are easily damaged if the pressure in the system is excessive during operation.

Disclosure of Invention

It is an object of the present invention to provide a fluid control device and a thermal management system that facilitates an improvement in the susceptibility of excessive pressures in the thermal management system to damage to the compressor and/or other fluid components.

In one aspect, an embodiment of the present invention provides a fluid control device having a first chamber, the fluid control device including a valve body assembly and a valve element, the valve body assembly forming at least a part of a peripheral wall of the first chamber, the valve element being at least partially located in the first chamber and rotatable, the valve body assembly including a first flow passage, a second flow passage, and a third flow passage, the valve element including a communication duct, a first throttling groove, and a second throttling groove, the communication duct being capable of communicating one of the first flow passage and the second flow passage with the third flow passage, the first throttling groove having a flow cross-sectional area and the second throttling groove having a flow cross-sectional area smaller than a flow cross-sectional area of the communication duct, the communication duct including a first orifice, the first orifice being disposed toward an opening of the valve body assembly and being capable of opposing the first flow passage or the second flow passage;

the fluid control device is provided with a transition mode, in the transition mode, along the rotation direction of the valve core, the opening of the first pore channel, which faces the valve body assembly, is positioned between the first flow channel and the second flow channel, one of the first flow channel and the second flow channel is communicated with the first throttling groove, and the other is communicated with the second throttling groove.

In another aspect, an embodiment of the present invention provides a thermal management system, including a compressor, a fluid assembly, and a fluid control device as described above, where the compressor includes at least two ports, where at least one of the ports of the compressor is capable of communicating with the fluid control device through the fluid assembly.

According to the fluid control device and the thermal management system provided by the embodiment of the invention, the fluid control device comprises a valve body assembly and a valve core, the valve body assembly comprises a first flow channel, a second flow channel and a third flow channel, the valve core comprises a communication pore canal, a first throttling groove and a second throttling groove, and the communication pore canal can communicate one of the first flow channel and the second flow channel with the third flow channel, so that the fluid control device can realize switching of fluid flow channels; further, the communication duct includes a first duct, since the flow cross-sectional area of the first orifice and the flow cross-sectional area of the second orifice are smaller than the flow cross-sectional area of the communication duct, and the fluid control device has a transition mode in which an opening of the first duct in a direction of the valve body assembly is located between the first flow passage and the second flow passage in a circumferential direction of the valve element, and one of the first flow passage and the second flow passage is communicated with the first orifice and the first flow passage, and the other is communicated with the second orifice, so that when the opening of the first duct rotates between the first flow passage and the second flow passage to achieve switching of the first flow passage and the second flow passage, a certain flow of fluid can flow through the first orifice and the second orifice in the thermal management system, which can improve damage to the compressor and/or other fluid assemblies caused by excessive pressure of the thermal management system during operation as compared with closing the first flow passage and the second flow passage during switching.

Drawings

FIG. 1 is a schematic exploded view of a fluid control device according to one embodiment of the present invention;

FIG. 2 is a schematic elevational view of a fluid control device according to a first embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic cross-sectional view of FIG. 2 taken along the direction A-A;

FIG. 4 is a schematic cross-sectional view of the structure of FIG. 2 along the direction B-B;

FIG. 5 is a schematic cross-sectional view of a fluid control device in one position provided in accordance with one embodiment of the present invention;

FIG. 6 is a schematic view of a first housing according to an embodiment of the present invention;

fig. 7 is an exploded structural view of the first housing shown in fig. 6;

FIG. 8 is a schematic structural view of a valve element according to a first embodiment of the present invention;

FIG. 9 is a schematic elevational view of the valve cartridge shown in FIG. 8;

FIG. 10 is a schematic cross-sectional view of FIG. 9 taken along the direction C-C;

FIG. 11 is a schematic cross-sectional view of the structure of FIG. 9 taken along the direction D-D;

FIG. 12 is an enlarged schematic view of the structure at Q1 in FIG. 11;

FIG. 13 is an enlarged schematic view of the structure at Q2 in FIG. 11;

FIG. 14 is a schematic cross-sectional view of a valve cartridge according to an embodiment of the present invention;

FIG. 15 is a schematic view of a fluid control device according to an embodiment of the present invention in a first mode of operation;

FIG. 16 is a schematic view of a fluid control device according to an embodiment of the present invention in a second mode of operation;

FIG. 17 is a schematic view of a fluid control device according to an embodiment of the present invention in a transitional mode;

FIG. 18 is a schematic view of a fluid control device according to an embodiment of the present invention in a third mode of operation;

FIG. 19 is a schematic view of a fluid control device according to an embodiment of the present invention in a fourth mode of operation;

FIG. 20 is a schematic view showing the relationship between the throttle area and the rotation angle of the spool in the fluid control device according to the embodiment of the present invention;

FIG. 21 is a schematic block diagram of a thermal management system provided by one embodiment of the present invention.

Detailed Description

Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. Relational terms such as "first" and "second", and the like, may be used solely to distinguish one element from another element having the same name, and do not necessarily require or imply any such actual relationship or order between the elements.

As shown in fig. 1 to 5, an embodiment of the present invention provides a fluid control device 1, which fluid control device 1 can be applied to a vehicle thermal management system including a new energy vehicle thermal management system or an air conditioning system.

The fluid control device 1 comprises a driving mechanism 30, a valve body assembly 10, a valve rod 34 and a valve core 20, wherein the valve body assembly 10 is provided with a first cavity 101, at least part of the valve core 20 is positioned in the first cavity 101, the driving mechanism 30 comprises an outer shell 31 and a motor assembly 32, the motor assembly 32 is in transmission connection with a transmission mechanism 33, the transmission mechanism 33 is in transmission connection with one end of the valve rod 34, the other end of the valve rod 34 is in transmission connection with the valve core 20, and when the fluid control device is in specific implementation, the other end of the valve rod 34 comprises a connecting structure, the valve core 20 is provided with a matching structure matched with the connecting structure, and the connecting structure and the matching structure are mutually nested or in interference connection or are fixedly connected into an integral structure, so that the other end of the valve rod 34 is in transmission connection with the valve core 20. The motor assembly 32 of the driving mechanism 30 outputs a rotation moment to the transmission mechanism 33, and the transmission mechanism 33 adjusts the rotation moment output by the motor assembly 32 and then transmits the rotation moment to the valve rod 34, so that the valve rod 34 drives the valve core 20 to rotate. In the present embodiment, the transmission mechanism 33 includes a plurality of toothed transmission members, but as other embodiments, the transmission mechanism 33 may be other gear reduction mechanisms. It should be noted here that: when the rotational torque output from the driving mechanism 30 is sufficient, the fluid control device 1 may not include the transmission mechanism 33; alternatively, the driving mechanism 30 and the transmission mechanism 33 may be integrally designed or the transmission mechanism 33 and the driving mechanism 30 may be disposed at intervals along the axial direction of the fluid control device 1, and in this embodiment of the present invention, the driving mechanism 30 includes an outer housing 31, and the transmission mechanism 33 is located in a cavity defined by the outer housing 31, so as to facilitate reducing the axial height of the fluid control device 1.

Referring to fig. 3 to 5, the motor assembly 32 is located in a chamber defined by the outer housing 31, and the motor assembly 32 includes a coil winding 321, a rotor 322 and a motor shaft 323, and when the outer housing 31 is formed, the coil winding 321 may be integrally injection-molded to form the outer housing 31 as an injection molding insert, the coil winding 321 is located at an outer peripheral side of the rotor 322, the rotor 322 is fixedly connected with the motor shaft 323, the coil winding 321 is separated from the rotor 322 by an isolating cover, which is beneficial to avoiding fluid located at the rotor 322 from contacting the coil winding 321, and ensuring safety of the coil winding 321. As shown in fig. 5, the driving mechanism 30 further includes an interface terminal 35, and the interface terminal 35 may be integrally injection molded or assembled with the outer housing 31, and the driving mechanism 30 is electrically and/or signally connected to the outside through the interface terminal 35, thereby controlling the operation of the fluid control device.

As shown in fig. 2 to 7, in some embodiments, the valve body assembly 10 further includes a first flow passage 11, a second flow passage 12, and a third flow passage 13, and the first flow passage 11, the second flow passage 12, and the third flow passage 13 are disposed at intervals along the outer circumference of the first chamber 101, and in particular embodiments, the first flow passage 11 and the second flow passage 12 may be disposed separately on both sides of the rotational axis of the spool 20, wherein the spool 20 may rotate about the rotational axis, the extending direction of the rotational axis is parallel or coincident with the axial direction of the valve stem 34, the spool 20 includes a communication port 201, and by rotating the spool 20, the communication port 201 can communicate one of the first flow passage 11 and the second flow passage 12 with the third flow passage 13, that is, the communication port 201 can communicate the first flow passage 11 with the third flow passage 13, or communicate the second flow passage 12 with the third flow passage 13. Specifically, as shown in fig. 5, in some embodiments, the cross section of the communication channel 201 of the valve core 20 is in an "L" shape, and the first channel 11 and the third channel 13 or the second channel 12 and the third channel 13 can be communicated by rotating around the axis of the motor shaft 323, and at this time, the third channel 13 can be used as an inlet channel, and the first channel 11 and the second channel 12 can be used as an outlet channel, thereby realizing the function of "one-inlet-two-outlet" of the flow control device.

Further, in some embodiments, the communicating channel 201 of the valve core 20 includes a first channel 21 and a second channel 24, where the extending direction of the first channel 21 and the extending direction of the second channel 24 form an included angle, optionally, the extending direction of the first channel 21 and the extending direction of the second channel 24 form 90 degrees, the second channel 24 communicates with the third flow channel 13, the opening of the first channel 21 facing the valve body assembly 10 can be opposite to the first flow channel 11 or the second flow channel 12, so that the opening of the first channel 21 facing the valve body assembly 10 can communicate with one of the first flow channel 11 and the second flow channel 12, and through the rotation of the valve core 20, the first channel 21 can communicate with the first flow channel 11 and the second flow channel 12 and switch between them, so that the first channel 21 and the second channel 24 of the valve core 20 communicate one of the first flow channel 11 and the second flow channel 12 with the third flow channel 13, and the first flow channel 11 and the second flow channel 12 are illustrated herein as inlet channels and outlet channels.

Referring further to fig. 2 to 7, the valve body assembly 10 includes a first housing 110, a second housing 120 and a third housing 130 that are connected to each other in a sealing manner, wherein the first chamber 101, the first flow channel 11 and the third flow channel 13 are all located in the first housing 110, at this time, the valve core 20 is located in the first chamber 101 of the first housing 110, and further, the first housing 110 further includes a first communication channel 16 and a second communication channel 17 that are in communication with the first flow channel 11, wherein the second communication channel 17 is in communication with the outside, such that fluid can enter or leave the fluid control device through the second communication channel 17. At least part of the second housing 120 is located in the first chamber 101, and a wall portion of the second housing 120 is sealingly disposed with the valve spool 20 by a seal, and the second flow passage 12 is located in the second housing 120. It should be noted that the first flow channel 11 and the second flow channel 12 may be interchanged, that is, the first flow channel 11 is located in the second housing 120, the second flow channel 12 is located in the first housing 110 and is in communication with the first communication channel 16 and the second communication channel 17, which is not limited in this disclosure, and the second flow channel 12 is located in the second housing 120, and the first flow channel 11 and the third flow channel 13 are both located in the first housing 110 are illustrated herein as examples. As shown in fig. 4, the third housing 130 includes a third communication duct 441, a fourth communication duct 442, and a fifth communication duct 443, wherein the third communication duct 441 is capable of communicating with the outside, and the fourth communication duct 442 and the fifth communication duct 443 are both in communication with the third communication duct 441.

Based on this, in some embodiments, the fluid control device further includes a check valve component 50 and a gas-liquid separation component 40, where the check valve component 50 may be disposed in the first communication channel 16 or disposed in the fifth communication channel 443, at least a portion of the fifth communication channel 443 may be in unidirectional communication with the first communication channel 16 through the check valve component 50, the gas-liquid separation component 40 is disposed in the third communication channel 441, specifically, the gas-liquid separation component 40 includes a joint portion 41, a conductive pipe 42, and a baffle portion 43, where the conductive pipe 42 is fixedly connected with the joint portion 41, and in this embodiment, the conductive pipe 42 is fixed with the joint portion 41 in an interference fit manner, and of course, as other embodiments, the conductive pipe 42 and the joint portion 41 may be fixed by welding, adhesive, or screwing, or the conductive pipe 42 and the joint portion 41 may be integrally formed; the interface 41 is fixedly connected with the third housing 130, in this embodiment, the interface 41 is fixed with the third housing 130 by threads, and further, a sealing arrangement is further performed between the interface 41 and the third housing 130, which is beneficial to avoiding leakage of fluid from an assembly gap between the interface 41 and the third housing 130; the baffle 43 is fixedly connected with the third housing 130, and in this embodiment, the baffle 43 is fixed with the end counterbore of the third communicating hole 441 by interference fit of the rod portion thereof; the blocking portion 43 is provided at a distance from the conduit 42.

The conduit 42 includes a through hole 421, the interface portion 41 includes an interface channel 411, and the through hole 421 communicates the third communicating duct 441 with the interface channel 411, so that the third communicating duct 441 can communicate with the outside through the through hole 421 and the interface channel 411. In addition, the third communication hole 441 is also capable of communicating with the second communication hole 17 through the third communication hole 441, the check valve member 50, and the first communication hole 16, and communicating with the outside through the second communication hole 17. By providing the gas-liquid separation member 40 for gas-liquid separation of the fluid located in the third communication duct 441, and by the above arrangement, integration of the gas-liquid separation member 40, the check valve member 50, and the valve device having the valve element 20 can be achieved, and the integration level of the fluid control device can be improved. It will be appreciated that the fluid control device provided in the embodiments of the present invention may be an integrated structure comprising a valve device structure including the valve cartridge 20 and other fluid components, or a valve device structure including only the valve cartridge 20.

At this time, the fluid control device includes a first connection port TP1, a second connection port TP2, and a third connection port TP3, where the first connection port TP1 may be located on a surface of the third housing 130 or may be located on a surface of the first housing 110, the first connection port TP1 communicates with the third flow channel 13, and the first connection port TP1 may be an inlet of the fluid control device; the second connection port TP2 communicates with the third communication channel 441 such that the gas separated after the fluid passes through the gas-liquid separation member 40 can be discharged from the second connection port TP 2; the third connection port TP3 communicates with the first flow channel 11 and the first communication channel 16, and the first connection port TP1 may serve as an inlet of the fluid control device, the second connection port TP2 as one of outlets of the fluid control device, and the third connection port TP3 as the other outlet of the fluid control device.

In view of this, when the fluid control device provided in the embodiment of the present invention is applied to a thermal management system, it is necessary to throttle the fluid, and in order to solve the above-mentioned problems, as shown in fig. 8 to 13, a valve core 20 structure is provided in the first embodiment of the present invention, in which the valve core 20 includes a communication duct 201, a first throttle groove 22 and a second throttle groove 23, the communication duct 201 being capable of communicating one of the first flow channel 11 and the second flow channel 12 with the third flow channel 13, the flow cross-sectional area of the first throttle groove 22 and the flow cross-sectional area of the second throttle groove 23 being smaller than the flow cross-sectional area of the communication duct 201, so that throttling is facilitated by the first throttle groove 22 and the second throttle groove 23, so that a certain flow of the fluid can flow through the first throttle groove 22 and/or the second throttle groove 23 in the thermal management system.

Specifically, the communication port 201 includes a first port 21, and an opening of the first port 21 toward the valve body assembly 10 is capable of communicating with one of the first flow passage 11 and the second flow passage 12, so that full communication of the fluid control device is facilitated through the first port 21. At least one of the first throttling groove 22 and the second throttling groove 23 is communicated with the first pore canal 21, or along the circumferential direction of the valve core 20, the first throttling groove 22 and the second throttling groove 23 are arranged at intervals with the first pore canal 21 towards the opening of the valve body assembly 10, and at the moment, the first throttling groove 22 and the second throttling groove 23 can be not communicated with the first pore canal 21 in the area where the valve core 20 is located.

Illustratively, as shown in FIG. 8, the first throttling groove 22 communicates with the first orifice 21, the second throttling groove 23 is spaced apart from the first orifice 21, or in some other embodiments, both the first throttling groove 22 and the second throttling groove 23 communicate with the first orifice 21. The flow cross-sectional area of the first throttling groove 22 and the flow cross-sectional area of the second throttling groove 23 are smaller than the flow cross-sectional area of the first pore canal 21, so that the fluid can realize the throttling function on the fluid when flowing through the first throttling groove 22 and the second throttling groove 23, wherein the flow cross-sectional area of each structure refers to the area of the obtained cross-sectional structure when the structure is subjected to cross-section along the direction perpendicular to the flow direction of the fluid.

As shown in fig. 15 to 19, since the valve core 20 enables one of the first flow passage 11 and the second flow passage 12 to communicate with the third flow passage 13, the valve core 20 can switch between the first flow passage 11 and the second flow passage 12 by rotating during operation of the thermal management system, and during the switching, as shown in fig. 17, when the communication passage 201 of the valve core 20 is located between the first flow passage 11 and the second flow passage 12 toward the opening of the valve body assembly in the circumferential direction of the valve core 20, if there is no fluid circulation in the thermal management system, the pressure in the flow passage of the thermal management system is excessive, which may easily cause damage to the compressor and/or other fluid assemblies. To solve the above problems, as shown in fig. 17, the fluid control device according to the embodiment of the present invention has a transition mode in which the opening of the first duct 21 toward the valve body assembly direction is located between the first flow passage 11 and the second flow passage 12 along the rotation direction of the valve body 20, and one of the first flow passage 11 and the second flow passage 12 is communicated with the first throttling groove 22, and the other is communicated with the second throttling groove 23. Illustratively, in fig. 17, the first flow passage 11 communicates with a first throttling groove 22 and the second flow passage 12 communicates with a second throttling groove 23. Through the above arrangement, when the opening of the communicating duct 201 rotates between the first flow channel 11 and the second flow channel 12 to realize the switching of the first flow channel 11 and the second flow channel 12, a certain flow of fluid can circulate in the thermal management system through the first throttling groove 22 and the second throttling groove 23, and compared with the condition that the first flow channel 11 and the second flow channel 12 are closed in the switching process, the damage of a compressor and/or other fluid components caused by the overlarge pressure of the thermal management system in the operation process can be improved, and the operation stability of the thermal management system is improved.

Referring to fig. 14 and 15, in some embodiments, when the first flow channel 11 and the second flow channel 12 are disposed on two radial sides of the valve core 20, in order to realize the throttling mode of the fluid control device, a maximum included angle a1 between the first throttling groove 22 and the second throttling groove 23 and the center of sphere of the valve core 20 is greater than or equal to 137 degrees. In specific implementation, the included angle a1 between the edge of the first throttling groove 22 and the edge of the second throttling groove 23 and the center of sphere of the valve core 20 may be 137 degrees, or 138 degrees, 140 degrees, or other values convenient for realizing the throttling mode, which is not limited by the present invention, or when a1 may be less than 137 degrees, a transition mode may be realized.

Referring further to fig. 11-13, in some embodiments, at least a portion of the first throttling groove 22 and at least a portion of the second throttling groove 23 extend in the direction of rotation of the valve spool 20, and the first throttling groove 22 and the second throttling groove 23 are arranged in the direction of rotation of the valve spool 20 to facilitate throttling of fluid during rotation of the valve spool 20. The first duct 21 has an opening penetrating through a surface of one side of the valve body 20, the first and second throttle grooves 22 and 23 are each formed from the outer surface of the valve body 20 to the inner recess of the valve body 20, at least a portion of the first throttle groove 22 is recessed to the inner recess of the valve body 20 in a circumferential direction of the valve body and in a direction close to the opening of the first duct 21, and at least a portion of the second throttle groove 23 is recessed to the inner recess of the valve body 20. By the above arrangement, the throttling function of the first throttling groove 22 and the second throttling groove 23 can be facilitated.

Referring further to fig. 8-14, in some embodiments, at least one of the first throttling groove 22 and the second throttling groove 23 comprises at least two segments of throttling subslots TS, the different throttling subslots TS being different in structural dimension, the structural dimension comprising at least one of a width of the throttling subslots TS and a radius of curvature of a bottom wall of the throttling subslots TS. Through the arrangement, at least one of the first throttling groove 22 and the second throttling groove 23 can have better throttling precision for different flow rates such as high flow rate, low flow rate and the like through the throttling sub-groove TS with different structural sizes.

It should be noted that, the throttling sub-slot TS has a slot structure, including a side wall and a bottom wall, when the surface of each throttling sub-slot TS is a curved surface, the radius of curvature of the throttling sub-slot TS is the radius of the curved surface corresponding to each throttling sub-slot TS, and when the surface of each throttling sub-slot TS is a non-curved surface, the radius of curvature of the throttling sub-slot TS can be the equivalent radius of the curved surface of each endpoint on the throttling sub-slot TS; the width of each throttle sub-slot TS is the distance between the sidewalls of the throttle sub-slot TS.

When the fluid control device is in the transitional mode, the flow rate of the fluid flowing through the thermal management system is desirably small, for example, the flow rate of the fluid flowing through the thermal management system is desirably greater than 0 and equal to or less than 7g/s, and in order to achieve the above function, in some implementations, the throttle subslot TS of the first throttle slot 22 includes a first subslot 221 and a second subslot 222, the first subslot 221 is located between the second subslot 222 and the opening of the first orifice 21 in the circumferential direction of the valve element 20, and the depth of the recess of the second subslot 222 into the valve element 20 is smaller than the depth of the recess of the first subslot 221 into the valve element interior; the second throttling groove 23 includes a third sub groove 232 and a fourth sub groove 233, the third sub groove 232 is located between the fourth sub groove 233 and the opening of the first duct 21 along the circumferential direction of the valve core 20, the depth of the fourth sub groove 233 recessed toward the inside of the valve core 20 is smaller than the depth of the third sub groove 232 recessed toward the inside of the valve core 20, in some embodiments, the second throttling groove 23 may further include a fifth sub groove 231, the fifth sub groove 231 is located between the third sub groove 232 and the opening of the first duct 21 along the circumferential direction of the valve core 20, and by providing the fifth sub groove 231, the throttling precision of the second throttling groove 23 is facilitated to be improved, and when the second throttling groove 23 is spaced from the opening of the first duct 21, the second throttling groove 23 can be conveniently manufactured. Based on this, in conjunction with fig. 8 and 17, in the transition mode, the second sub-groove 222 communicates with one of the first and second flow passages 11 and 12, the fourth sub-groove 233 communicates with the other of the first and second flow passages 11 and 12, and illustratively, the second sub-groove 222 communicates with the first flow passage 11, and the fourth sub-groove 233 communicates with the second flow passage 12 to achieve a small flow of fluid through the thermal management system in the transition mode.

Based on this, in some embodiments, the width of the first sub-groove 221 is defined as L3, the width of the second sub-groove 222 is defined as L4, the radius of curvature of the bottom wall of the second sub-groove 222 is defined as R5, the radius of curvature of the bottom wall of the first sub-groove 221 is defined as R4, the width L4 of the second sub-groove 222 is smaller than the width L3 of the first sub-groove 221, and/or R5 < R4, wherein the widths and the radii of curvature of the first sub-groove 221 and the second sub-groove 222 can be set according to the user's requirement, which is not limited by the present invention. Through the arrangement, the first sub-tank 221 can better throttle the high-flow fluid, and the second sub-tank 222 can better throttle the low-flow fluid, so that the throttling precision of the fluid control device in the embodiment of the invention is improved.

Further, in some embodiments, the width of the fifth sub-slot 231 and the third sub-slot 232 are both defined as L1, the width of the fourth sub-slot 233 is defined as L2, the radius of curvature of the fourth sub-slot 233 is defined as R3, the radius of curvature of the third sub-slot 232 is defined as R2, the radius of curvature of the fifth sub-slot 231 is R1, the width L2 of the fourth sub-slot 233 is smaller than the width L1 of the third sub-slot 232, and the width L2 of the fourth sub-slot 233 is smaller than the width L1 of the fifth sub-slot 231; and/or R3 < R2, R2 > R1, and R1 < R3, wherein the width of the fifth sub-slot 231 and the width of the third sub-slot 232 may be the same or different, and the fifth sub-slot 231, the third sub-slot 232, and the fourth sub-slot 233 can be set according to the needs of the user, which is not limited in the present invention. Through the arrangement, the second throttling groove 23 can be conveniently manufactured, the high-flow fluid can be throttled better through the third sub-groove 232, and the low-flow fluid can be throttled better through the fourth sub-groove 233, so that the throttling precision of the fluid control device for the embodiment of the invention on the high-flow fluid and the low-flow fluid is improved, and when the fourth sub-groove 233 is communicated with the second flow passage 12, the realization of passing of the low-flow fluid through the thermal management system in the transition mode is facilitated.

It will be appreciated that in the specific implementation, the first sub-slot 221 and the second sub-slot 222 have different structural dimensions, and the fifth sub-slot 231, the third sub-slot 232 and the fourth sub-slot 233 have the same structural dimensions; or the first sub-slot 221 and the second sub-slot 222 have the same structural size, and the fifth sub-slot 231, the third sub-slot 232 and the fourth sub-slot 233 have different structural sizes; or the first sub-slot 221 and the second sub-slot 222 are different in structural size, and the fifth sub-slot 231, the third sub-slot 232 and the fourth sub-slot 233 are different in structural size; or the first sub groove 221 and the second sub groove 222 are identical in structural size, and the fifth sub groove 231, the third sub groove 232 and the fourth sub groove 233 are identical in structural size, which is not limited in the present invention as long as the transition mode can be realized, and the structural size includes at least one of a radius of curvature and a width.

To further improve the throttle accuracy of the first throttle groove 22 and the second throttle groove 23, as shown in fig. 8 to 14, in some embodiments, when the first throttle groove 22 includes the first sub groove 221 and the second sub groove 222, and the second throttle groove 23 includes the third sub groove 232, the fourth sub groove 233, and the fifth sub groove 231, an angle formed by an intersection point between both ends of the throttle sub groove TS and the center of the spool 20 is defined as a throttle angle along the rotation direction of the spool 20; the throttle angle a5 of the first sub-slot 221 is greater than the throttle angle a6 of the second sub-slot 222, the throttle angle a2 of the fifth sub-slot 231 is less than the throttle angle a3 of the third sub-slot 232, the throttle angle a3 of the third sub-slot 232 is greater than the throttle angle a4 of the fourth sub-slot 233, and the throttle angle a4 of the fourth sub-slot 233 is less than the throttle angle a2 of the fifth sub-slot 231.

In other embodiments, the first throttling groove 22 and the second throttling groove 23 may be a segment of throttling groove with the same radius of curvature and width, so long as the fluid control device can have a transition mode.

The fluid control device provided by the embodiment of the present invention not only has a transition mode, but also may have at least one of the following four operation modes, and the operation modes of the fluid control device provided by the above embodiment are described below with reference to fig. 5 and 15 to 20.

As shown in fig. 15, the fluid control device is in the first operation mode, the opening of the first orifice 21 of the valve element 20 is communicated with the first flow passage 11, and the second orifice 24 is communicated with the third flow passage 13, and at this time, the fluid control device is in the all-pass state.

As shown in fig. 16, the fluid control device is in the second operation mode, the first throttling groove 22 is communicated with the first flow passage 11, the openings of the second throttling groove 23 and the first pore canal 21 facing the valve body assembly are positioned between the first flow passage 11 and the second flow passage 12, the second pore canal 24 is communicated with the third flow passage 13, at this time, fluid flows into the first cavity 101 from the second pore canal 24 and the first pore canal 21, fluid in the first cavity 101 flows into the first flow passage 11 through the first throttling groove 22, and at this time, the first flow passage 11 is in a throttling expansion state. By rotating the valve body 20 counterclockwise so that the first throttling groove 22 is also communicated with the first flow passage 11, the first throttling groove 22 can be made to perform rough flow adjustment on the fluid flowing through the first flow passage 11, and then throttle expansion is performed on the fluid flowing through the first flow passage 11 through different throttle sections of the first throttling groove 22. The spool can be switched from the first operating mode to the second operating mode by rotating counterclockwise.

As shown in fig. 17 and 20, the fluid control device is in a transitional mode, the first throttling groove 22 is in communication with the first flow channel 11, the second throttling groove 23 is in communication with the second flow channel 12, the fluid flowing into the first cavity 101 through the first orifice 21 can enter the first flow channel 11 through the first throttling groove 22, and enter the second flow channel 12 through the second throttling groove 23, so that both the second flow channel 12 and the first flow channel 11 are in an open state, and a part of the fluid flows through, at this time, the sum of the flow rates of the fluid flowing into the second flow channel 12 and the first flow channel 11 can be greater than 0 and less than or equal to 7g/s, for example, the sum of the flow rates of the fluid flowing into the second flow channel 12 and the first flow channel 11 can be 7g/s, or 6g/s, or 5.5g/s, etc., the medium flowing into the thermal management system can be a refrigerant, for example, the refrigerant R134a or the refrigerant R1234yf. The spool 20 is capable of switching from the second operating mode to the transitional mode by rotating counterclockwise.

Referring to fig. 18 and 20, the fluid control device is in the third operating mode, and the openings of the first throttling groove 22 and the first duct 21 facing the valve body assembly are located between the first flow passage 11 and the second flow passage 12 along the circumferential direction of the valve core 20, and the second throttling groove 23 is communicated with the second duct 12, so that throttling expansion of the second flow passage 12 can be achieved. The spool 20 is capable of being switched from the transition mode to the third operating mode by rotating counterclockwise.

Referring to fig. 5, 19 and 20, the fluid control device is in a fourth mode of operation, wherein the first port 21 communicates with the second flow passage 12 and the second port 24 communicates with the third flow passage 13 to enable throttled expansion of the second flow passage 12. The spool 20 is capable of being switched from the third operating mode to the fourth operating mode by rotating counterclockwise.

Based on the above, by setting the transition mode, when the fluid control device is applied to the thermal management system, the operation of the compressor in the thermal management system can be ensured, and the condition that the compressor is damaged or the normal operation of the compressor is influenced due to the overlarge pressure in the thermal management system is prevented; and by providing the first throttling groove 22 and the second throttling groove 23, the switching time can be shortened as compared with the case where the throttling of two outlet passages is achieved by one throttling groove.

In summary, according to the fluid control device 1 provided by the embodiment of the present invention, the fluid control device 1 includes a valve body assembly 10 and a valve core 20, the valve body assembly 10 includes a first flow channel 11, a second flow channel 12 and a third flow channel 13, the valve core 20 includes a communication channel 201, a first throttling groove 22 and a second throttling groove 23, the communication channel 201 can communicate one of the first flow channel 11 and the second flow channel 12 with the third flow channel 13, so that the fluid control device 1 can realize switching of fluid flow channels; further, since the flow cross-sectional area of the first orifice groove 22 and the flow cross-sectional area of the second orifice groove 23 are smaller than the flow cross-sectional area of the communication duct 201, and the fluid control device 1 has a transition mode in which the opening of the communication duct 201 in the direction of the valve body assembly 10 is located between the first flow channel 11 and the second flow channel 12 along the circumferential direction of the valve core 20, and one of the first flow channel 11 and the second flow channel 12 is communicated with the first orifice groove 22, and the other is communicated with the second orifice groove 23, when the opening of the communication duct 201 rotates between the first flow channel 11 and the second flow channel 12 to realize the switching of the first flow channel 11 and the second flow channel 12, a certain flow rate of fluid can flow through the first orifice groove 22 and the second orifice groove 23 in the thermal management system, which can improve the damage of the compressor and/or other fluid assemblies caused by the excessive pressure in the operation process of the thermal management system compared with the closing of the first flow channel 11 and the second flow channel 12 in the switching process.

On the other hand, as shown in fig. 1 to 21, the embodiment of the present invention further provides a thermal management system 1000, including a compressor 200, a fluid assembly, and a fluid control device 1 of any of the foregoing embodiments, where the compressor 200 includes at least two ports, and at least one port of the compressor 200 is capable of communicating with the fluid control device 1 through the fluid assembly. The fluid component may be used as one or a combination of a heat exchanger, a throttle element such as a throttle valve, a valve element such as a shutoff valve, a gas-liquid separator, and a component for circulating a fluid such as a pump. The thermal management system 1000 according to the embodiment of the present invention has the same beneficial effects as the fluid control device 11 according to any of the embodiments described above, and will not be described again. Further, when the fluid control device 1 has three flow channels and has a transition mode, the operation of the compressor 200 can be ensured, the situation that the compressor 200 is damaged or the normal operation of the compressor 200 is affected due to the excessive pressure in the thermal management system 1000 is prevented, and the working stability of the thermal management system 1000 is improved.

Illustratively, the vehicle thermal management system is described as an example, where the fluid in the thermal management system is typically a refrigerant. As shown in fig. 21, the thermal management system includes a compressor 200, a fluid control device 1, a first heat exchanger 310, and a second heat exchanger 320, the compressor 200 including a first port 210, a second port 220, and a third port 230, the first port 210 being an outlet of the compressor 200, the second port 220 being a low pressure inlet, and the third port 230 being a relatively high pressure inlet. The first heat exchanger 310 can communicate with the first port 210 of the compressor 200, and the high-temperature and high-pressure refrigerant emits heat at the first heat exchanger 310 to heat the gas flowing through the first heat exchanger 310, thereby increasing the temperature of the gas flow. Taking the example of the application of the thermal management system to the vehicle, the second heat exchanger 320 may be disposed at a front end of the vehicle, where the front end of the vehicle refers to a position where the second heat exchanger 320 can exchange heat with ambient air, in particular, the refrigerant can release heat to or absorb heat from the ambient air at the second heat exchanger 320, and the second heat exchanger 320 can exchange heat with the ambient air.

In some embodiments, the thermal management system may further include a third heat exchanger 330, a throttling unit 410 is further disposed upstream of the refrigerant inlet of the third heat exchanger 330, the refrigerant throttled by the throttling unit 410 absorbs heat of the airflow flowing through the third heat exchanger 330 at the third heat exchanger 330, so as to reduce the temperature of the airflow, the first heat exchanger 310 and the third heat exchanger 330 are disposed in an air duct of the vehicle air conditioner, and the first heat exchanger 310 may be disposed in a downwind direction of the third heat exchanger 330. In operation of the thermal management system 1000, the refrigerant in the first heat exchanger 310 and the refrigerant in the third heat exchanger 330 exchange heat with the air flow in the air conditioning unit to regulate the temperature of the air flow in the air conditioning unit and, in turn, the temperature of the passenger compartment of the vehicle.

Referring to fig. 21, in the solution of the present embodiment, the refrigerant outlet of the first heat exchanger 310 is communicated with the first connection port TP1 of the fluid control device 1, the third port 230 of the compressor 200 is communicated with the second connection port TP2 of the fluid control device 1, the first port of the second heat exchanger 320 is communicated with the third connection port TP3 of the fluid control device 1, and the second port of the second heat exchanger 320 can be communicated with the second port 220 of the compressor 200 or communicated with the second port 220 of the compressor 200 via the gas-liquid separator 500. In this embodiment, the thermal management system 100 may further be provided with a stop valve 60, where the stop valve 60 is disposed between the second port of the second heat exchanger 320 and the second port 220 of the compressor 200 to control whether the second port of the second heat exchanger 320 is in communication with the second port 220 of the compressor 200; the second port of the second heat exchanger 320 can also communicate with the third heat exchanger 330 through the throttling unit 410, and the refrigerant outlet of the third heat exchanger 330 communicates with the second port 220 of the compressor 200 or with the second port 220 of the compressor 200 through the gas-liquid separator 500. The thermal management system may further include a temperature damper disposed between the first heat exchanger 310 and the second heat exchanger 320 in the direction of the air flow, and the temperature damper may open or close or adjust the heat exchanger area of the first heat exchanger 310 to thereby control the heat exchange amount of the first heat exchanger 310.

When the fluid control device 1 is in the transition mode, the fluid flow rate flowing through the compressor and other fluid components is greater than 0 and less than or equal to 7g/s, preventing the compressor 200 and/or other fluid components from being damaged due to excessive pressure in the thermal management system, or preventing the compressor 200 and/or other fluid components from being affected by excessive pressure in the thermal management system.

It should be noted that: the above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, for example, the directions of "front", "rear", "left", "right", "up", "down", etc., and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified, combined or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention are intended to be included in the scope of the claims of the present invention.

Claims (10)

1. A fluid control device characterized in that the fluid control device has a first chamber, the fluid control device includes a valve body assembly and a valve core, the valve body assembly forms at least part of a peripheral wall of the first chamber, at least part of the valve core is located in the first chamber and can rotate, the valve body assembly includes a first flow passage, a second flow passage and a third flow passage, the valve core includes a communication duct, a first throttling groove and a second throttling groove, the communication duct can communicate one of the first flow passage and the second flow passage with the third flow passage, the flow cross section area of the first throttling groove and the flow cross section area of the second throttling groove are smaller than the flow cross section area of the communication duct, the communication duct includes a first duct, and an opening of the first duct toward the valve body assembly can be arranged opposite to the first flow passage or the second flow passage;

the fluid control device is provided with a transition mode, in the transition mode, along the rotation direction of the valve core, the opening of the first pore channel, which faces the valve body assembly, is positioned between the first flow channel and the second flow channel, one of the first flow channel and the second flow channel is communicated with the first throttling groove, and the other is communicated with the second throttling groove.

2. The fluid control device of claim 1, wherein the first flow passage and the second flow passage are provided on both sides of the rotational axis of the spool, and a maximum included angle between the first throttle groove and the second throttle groove and a center of the spool is 137 degrees or more.

3. The fluid control device according to claim 1 or 2, wherein at least part of the first throttle groove and at least part of the second throttle groove extend in a rotational direction of the spool, the first throttle groove and the second throttle groove are each formed from an outer surface of the spool to an inner recess of the spool, the communication duct includes a first duct, and a depth of the recess of at least part of the first throttle groove toward the inner recess of the spool increases in a circumferential direction of the spool and in a direction close to an opening of the first duct.

4. The fluid control device according to claim 3, wherein the first throttling groove includes a first subslot and a second subslot, the first subslot being located between the second subslot and the opening of the first duct in a circumferential direction of the spool, the second subslot being recessed to an inside of the spool to a depth smaller than a depth of the first subslot being recessed to the inside of the spool;

the second throttling groove comprises a third sub groove and a fourth sub groove, the third sub groove is positioned between the fourth sub groove and the opening of the first pore canal along the circumferential direction of the valve core, and the depth of the fourth sub groove recessed towards the interior of the valve core is smaller than that of the third sub groove recessed towards the interior of the valve core;

in the transition mode, the second subslot communicates with one of the first flow passage and the second flow passage, and the fourth subslot communicates with the other of the first flow passage and the second flow passage.

5. The fluid control device of claim 4 wherein the radius of curvature of the bottom wall of the second subslot is less than the radius of curvature of the bottom wall of the first subslot;

and/or the width of the second subslot is smaller than the width of the first subslot.

6. The fluid control device of claim 4 or 5 wherein the radius of curvature of the bottom wall of the fourth subslot is less than the radius of curvature of the bottom wall of the third subslot;

and/or the width of the fourth subslot is smaller than the width of the third subslot.

7. The fluid control device according to any one of claims 1 to 6, wherein the communication duct includes a first duct, an opening of which toward the valve body assembly is capable of communicating with one of the first flow passage and the second flow passage, the first throttle groove and the second throttle groove being arranged in a rotational direction of the spool;

at least one of the first throttling groove and the second throttling groove is communicated with the first pore canal; or along the circumferential direction of the valve core, the first throttling groove and the second throttling groove are arranged at intervals from the first pore canal towards the opening of the valve body assembly.

8. The fluid control device of claim 7 wherein the communication aperture further comprises a second aperture, wherein an angle is formed between the direction of extension of the first aperture and the direction of extension of the second aperture, and wherein the second aperture communicates with the first aperture, the fluid control device further comprising at least one of four modes of operation:

a first mode of operation, the first orifice communicating with the first flow passage and the second orifice communicating with the third flow passage;

the first throttling groove is communicated with the first flow passage, and openings of the second throttling groove and the first pore passage, which face the valve body assembly, are positioned between the first flow passage and the second flow passage along the circumferential direction of the valve core;

the second throttling groove is communicated with the second flow passage, and openings of the first throttling groove and the first pore canal, which face the valve body assembly, are positioned between the first flow passage and the second flow passage along the circumferential direction of the valve core;

a fourth mode of operation, the first orifice communicating with the second flow passage and the second orifice communicating with the third flow passage.

9. A thermal management system comprising a compressor, a fluid assembly and a fluid control device of any one of claims 1 to 8, the compressor comprising at least two ports, wherein at least one of the ports of the compressor is capable of communicating with the fluid control device through the fluid assembly.

10. The thermal management system of claim 9, wherein in the transition mode, a fluid flow through the compressor and the fluid assembly is greater than 0 and less than or equal to 7g/s.

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