Fluid management device

Abstract

The fluid management device provided by the embodiment of the present application comprises a stator assembly, a first rotor and a second rotor, the stator assembly can respectively drive the first rotor and the second rotor to rotate, the first rotor and the second rotor are respectively in transmission connection with a first impeller and a second impeller, such a fluid management device is relatively compact, and the first rotor and the second rotor of the fluid management device share one stator assembly, one circuit board is required to control the stator assembly, and the number of parts is also reduced accordingly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fluid management, and particularly relates to a fluid management device. BACKGROUND

[0002] The thermal management system comprises several functional components, different functional components need to be driven by different power sources, different power sources result in relatively complex integration of the functional components, and the volume is also relatively large. Even after integration, the integrated part is not compact enough. SUMMARY

[0003] The purpose of the present application is to provide a fluid management device to help solve the above problems.

[0004] One embodiment of the present application provides a fluid management device, comprising a housing, a motor assembly, a first impeller and a second impeller, the fluid management device has a first containing cavity, a second containing cavity and a third containing cavity, the first containing cavity, the second containing cavity and the third containing cavity are located in the housing, at least part of the motor assembly is located in the first containing cavity, the first impeller is located in the second containing cavity, and the second impeller is located in the third containing cavity; the motor assembly comprises a stator assembly, a first rotor and a second rotor, the stator assembly can rotate the first rotor, the stator assembly can rotate the second rotor, the first rotor is in transmission connection with the first impeller, and the second rotor is in transmission connection with the second impeller.

[0005] The fluid management device comprises a first port, a second port, a third port and a fourth port, the first port and the fourth port are in communication with the second containing cavity, one of the first port and the fourth port is an inlet of the fluid management device, and the other is an outlet of the fluid management device, the second port and the third port are in communication with the third containing cavity, one of the second port and the third port is another inlet of the fluid management device, and the other is another outlet of the fluid management device.

[0006] The fluid management device provided by the embodiment of the present application comprises a stator assembly, a first rotor and a second rotor, the stator assembly can rotate the first rotor and the second rotor respectively, the first rotor and the second rotor are in transmission connection with the first impeller and the second impeller respectively, such a fluid management device is relatively compact, and the first rotor and the second rotor of the fluid management device share one stator assembly, so that a corresponding circuit board is needed for control, thereby reducing the number of parts. BRIEF DESCRIPTION OF DRAWINGS

[0007] Figure 1 is a perspective structural schematic view of one view of a first embodiment of the fluid management device;

[0008] Figure 2 is Figure 1 a fluid management device in

[0009] Figure 3 is Figure 1 a fluid management device in

[0010] Figure 4 is Figure 1 a fluid management device in

[0011] Figure 5 is Figure 4 a fluid management device in

[0012] Figure 6 is Figure 1 a fluid management device in

[0013] Figure 7 is Figure 1 a fluid management device in

[0014] Figure 8 is a fluid management device in

[0015] Figure 9 Figure 8 is a fluid management device in

[0016] Figure 10 Figure 8 is a fluid management device in

[0017] Figure 11 Figure 8 is a fluid management device in

[0018] Figure 12 Figure 8 is a fluid management device in

[0019] Figure 13 Figure 12 is a fluid management device in

[0020] Figure 14 is

[0021] a fluid management device in Figure 15

[0022] Figure 16 is a perspective view of the fluid management device of Figure 15

[0023] Figure 17 is another perspective view of the fluid management device of Figure 15

[0024] Figure 18 is a front view of the fluid management device of Figure 15

[0025] Figure 19 is a cross-sectional view along C-C of Figure 18

[0026] Figure 20 is a perspective view of the first spacer sleeve of Figure 15

[0027] Figure 21 is a perspective view of the second spacer sleeve of Figure 15

[0028] Figure 22 is a front view of the second spacer sleeve of Figure 21

[0029] Figure 23 is a cross-sectional view along D-D of Figure 22

[0030] Figure 24 is a cross-sectional view of the spacer sleeve

[0031] Figure 25 is a perspective view of a fourth embodiment of the fluid management device

[0032] Figure 26 is a perspective view of the fluid management device of Figure 25

[0033] Figure 27 is another perspective view of the fluid management device of Figure 25

[0034] Figure 28 is a top view of the fluid management device of Figure 25

[0035] Figure 29 is a cross-sectional view along E-E of Figure 28

[0036] Figure 30 ​​​​​​​​​​​​is another schematic view of a cross-sectional structure of the fluid management device. DETAILED DESCRIPTION

[0037] The fluid management device of the technical solution of the present application can have various embodiments, at least one of which can be applied to a vehicle thermal management system, at least one of which can be applied to a household thermal management system or a commercial thermal management system or other thermal management systems, and the following will be described with reference to the drawings in the case of a fluid management device applied to a vehicle thermal management system. The fluid includes coolant.

[0038] Please refer to Figures 1-30 The present application provides a fluid management device, which comprises a housing, a motor assembly and an execution component, the execution component comprising a first execution component and a second execution component, wherein the first execution component can be a valve core, and the second execution component can be an impeller. When the fluid management device is working, the valve core can change the flow direction of the fluid, and the impeller can provide power for the fluid flow. The fluid management device has a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, the first accommodating cavity, the second accommodating cavity and the third accommodating cavity being located in the housing, at least part of the motor assembly being located in the first accommodating cavity, the first execution component being located in the second accommodating cavity, and the second execution component being located in the third accommodating cavity. The motor assembly comprises a stator assembly, a first rotor and a second rotor. After the fluid management device is powered on, the stator assembly can make the first rotor rotate, and the stator assembly can make the second rotor rotate. The first rotor is in transmission connection with the first execution component, and the second rotor is in transmission connection with the second execution component. The fluid management device has a first port and a second port, wherein the first port can communicate with the second accommodating cavity, the second port can communicate with the third accommodating cavity, and the first port and the second port can be formed in the housing or located in a pipe fixedly connected with the housing. In this embodiment, along the radial direction of the first accommodating cavity, the stator assembly is closer to the housing than the first rotor and the second rotor. Of course, the positional relationship between the first rotor, the second rotor and the stator can also have other embodiments, which will not be described in detail. The stator assembly of the fluid management device can control the actions of the first rotor and the second rotor respectively, the first rotor and the second rotor are in transmission connection with the first execution component and the second execution component respectively, and the fluid management device also has a first port and a second port, the first port communicates with the second accommodating cavity, and the second port can communicate with the third accommodating cavity. In this way, the fluid management device can control the actions of the first execution component and the second execution component respectively. For example, when the first execution component and the second execution component are impellers respectively, the impellers can drive the fluid in the second accommodating cavity and the third accommodating cavity to flow. For another example, when the first execution component is an impeller and the second execution component is a valve core, the impeller can drive the fluid in the second accommodating cavity to flow, and the valve core can change the flow direction of the fluid in the third accommodating cavity. The fluid management device is relatively compact, and the first rotor and the second rotor of the fluid management device share one stator assembly, so a corresponding circuit board is needed for control, which is conducive to reducing parts.

[0039] Please refer to Figures 1-7 In the embodiment, the fluid management device 10 comprises a housing 11, a motor assembly and an execution component, the motor assembly comprises a stator assembly 141, a first rotor 142 and a second rotor 143, the first rotor 142 is driven to rotate by the excitation magnetic field generated by the stator assembly 141, the second rotor 143 is driven to rotate by the excitation magnetic field generated by the stator assembly 141, the execution component comprises a first execution component and a second execution component, the first rotor and the second rotor are respectively in transmission connection with the first execution component and the second execution component, the first execution component is the impeller 12, the second execution component is the valve core 13, wherein the valve core 13 is a spherical valve core, of course, it can also be other forms of valve core, such as a cylindrical valve core. The fluid management device 10 has a first port 1001 and a second port 1002, the fluid management device 10 further has a third port 1003, a fourth port 1004 and a fifth port 1005, wherein the fourth port 1004 is in communication with the second containing cavity 1102, when the fluid management device 10 works, one of the first port 1001 and the fourth port 1004 is an inlet of the fluid management device 10, and the other is an outlet of the fluid management device 10, in the embodiment, the first port 1001 is the first inlet of the fluid management device 10, and the fourth port 1004 is the first outlet of the fluid management device 10. The third port 1003 and the fifth port 1005 can be in communication with the third containing cavity 1103, the valve core 13 can make at least one of the third port 1003 and the second port 1002 in communication with the fifth port 1005, in the embodiment, the fifth port 1005 can be an inlet of the fluid management device 10, and the third port 1003 and the second port 1002 are respectively two outlets of the fluid management device 10. Of course, the fluid management device 10 can further comprise other ports, which can be in communication with the third containing cavity 1103, and the fluid can flow into or out of the fluid management device 10 through these ports.

[0040] The housing 11 comprises a first housing 111, a second housing 112 and a third housing 113, along the axial direction of the first rotor 142, the second housing 112 is located on one side of the first housing 111, and the third housing 113 is located on the other side of the first housing 111, the second housing 112 and the third housing 113 are located on different sides of the first housing 111, the first housing 111 and the second housing 112 are sealingly connected, and the first housing 111 and the third housing 113 are sealingly connected. In the embodiment, the wall forming the second accommodating cavity 1102 comprises the inner wall of the second housing 112, the first port 1001 is formed in the second housing 112, and the wall forming the third accommodating cavity 1103 comprises the inner wall of the second housing 112. Specifically, the first housing 111 comprises a first main body 1111 and a second main body 1112, and the first main body 1111 and the second main body 1112 are integrally structured or fixedly connected or limitingly connected, wherein the first main body 1111 has a first accommodating cavity 1101, the first accommodating cavity 1101 has a port facing the impeller 12, and at least part of the motor assembly is located in the first accommodating cavity 1101, in the embodiment, the stator assembly 141 is fixedly connected or limitingly connected with the first main body 1111, along the radial direction of the first accommodating cavity 1101, the stator assembly 141 is located at the outer periphery of the second rotor 143, and the first rotor 142 is located at the inner periphery of the second rotor 143. The wall forming the third accommodating cavity 1103 comprises the second main body 1112, the valve core 13 is located in the third accommodating cavity 1103, and the second port 1002 and the third port 1003 and the fifth port 1005 are located in the second main body 1112. The axis of the first accommodating cavity 1101 and the axis of the second accommodating cavity 1102 are arranged in parallel, and the parallel arrangement herein includes the case that the axis of the first accommodating cavity 1101 and the axis of the second accommodating cavity 1102 are coaxial, and also includes the case that the axis of the first accommodating cavity 1101 and the axis of the second accommodating cavity 1102 are different but parallel, or in other words, the parallel arrangement herein includes the case that the first accommodating cavity 1101 and the second accommodating cavity 1102 are distributed along the axial direction of the first accommodating cavity 1101, and also includes the case that the first accommodating cavity 1101 and the second accommodating cavity 1102 are distributed along the direction perpendicular to the axis of the first accommodating cavity 1101.

[0041] Please refer to Figure 5The fluid management device 10 comprises an isolation sleeve 15 which isolates the first rotor 142 and the second rotor 143 from the stator assembly 141. Specifically, at least part of the isolation sleeve 15 is located in the first accommodating cavity 1101, at least part of the first rotor 142 is located in the inner periphery of the isolation sleeve 15, the stator assembly 141 and the second rotor 143 are located in the outer periphery of the isolation sleeve 15, and the isolation sleeve 15 is sealingly connected to the first housing 111. Specifically, the isolation sleeve 15 comprises an ear portion 151 and a main body portion 152, the main body portion 152 is located in the first accommodating cavity 1101, and the main body portion 152 has a concave cavity in which the first rotor 142 is located, the concave cavity is open towards the impeller 12, the ear portion 151 extends from the concave cavity of the main body portion 152 along the radial direction of the first accommodating cavity 1101, and the ear portion 151 is sealingly connected to the inner wall of the first housing 1111, so that the fluid in the second accommodating cavity 1102 cannot enter the cavity in which the stator assembly 141 is located, preventing the fluid from damaging the stator assembly 141 and facilitating the improvement of the service life of the fluid management device 10.

[0042] In the present embodiment, the third accommodating cavity 1103 and the second accommodating cavity 1102 are distributed along a direction perpendicular to the axis of the first rotor 142, and specifically, a first direction is defined, the first direction is perpendicular to the axis of the first rotor 142, and the first housing 1111 and the second housing 1112 are distributed along the first direction. In this way, the volume of the fluid management device 10 along the axial direction of the first rotor 142 can be reduced, which is conducive to the miniaturization of the fluid management device 10. The fluid management device 10 comprises a first shaft 161 which is fixedly connected or limitingly connected to the valve core 13, the second housing 1112 comprises a first isolation portion 1113 which has a first accommodating hole in which part of the first shaft 161 is located, the third accommodating cavity 1103 comprises a first sub-cavity 1105 and a valve cavity 1106 in which the valve core 13 is located, along the axial direction of the first shaft 161, the first sub-cavity 1105 is located on one side of the first isolation portion 1113, and the valve cavity 1106 is located on the opposite side of the first isolation portion 1113, so that part of the first shaft 161 is located in the first sub-cavity 1105, and the other part of the first shaft 161 is located in the valve cavity 1106 and is fixedly connected or limitingly connected to the valve core 13. The first shaft 161 and the hole wall of the first accommodating hole are sealingly arranged to prevent the fluid in the valve cavity 1106 from entering the first sub-cavity 1105.

[0043] Please refer to Figure 2 , Figure 3 and Figure 5The fluid management device 10 further comprises a transmission component 17, at least part of the transmission component 17 is located in the first sub-cavity 1105, the transmission component 17 comprises a first tooth portion 171 and a second tooth portion 172, wherein the first tooth portion 171 is fixedly connected with the second rotor 143, the second tooth portion 172 is fixedly connected with the first shaft 161, the first tooth portion 171 and the second tooth portion 172 are directly or indirectly transmissionally connected, when the fluid management device 10 is working, the first tooth portion 171 can drive the second tooth portion 172 to act, and then drive the valve core 13 to act. In a more specific embodiment, the transmission component 17 further comprises an intermediate tooth portion 173, correspondingly, the shell 11 has a communication hole 1110, the communication hole 1110 has an opening on the wall of the first accommodating cavity 1101 and the wall of the first sub-cavity 1105 respectively, the communication hole 1110 communicates the first accommodating cavity 1101 and the first sub-cavity 1105, part of the intermediate tooth portion 173 is located in the communication hole 1110, the intermediate tooth portion 173 is transmissionally connected with the first tooth portion 171, and the intermediate tooth portion 173 is transmissionally connected with the second tooth portion 172. The transmission component 17 is provided with the intermediate tooth portion 173, which can adjust the rotating speed or torque of the valve core 13, and improve the adaptability of the fluid management device 10.

[0044] Please refer to Figure 5 The second shell 112 comprises a first sub-portion 1121 and a second sub-portion 1122, wherein the wall forming the second accommodating cavity 1102 further comprises the inner wall of the first sub-portion 1121, the first port 1001 is located on the first sub-portion 1121, the first sub-portion 1121 is sealingly connected with the first main body 1111, and the wall forming the first sub-cavity 1105 comprises the inner wall of the second sub-portion 1122. The second sub-portion 1122 is sealingly connected with the second main body 1112. In the embodiment, the first sub-portion 1121 and the second sub-portion 1122 are integrated structure, the second shell 112 comprises a first sealing segment 1127, along the first direction, the first sealing segment 1127 is located between the first sub-portion 1121 and the second sub-portion 1122, the second main body 1112 or the first main body 1111 comprises a second sealing segment 1108, along the axial direction of the first rotor 142, the second sealing segment 1108 is closer to the second shell 112 than the communication hole 1110, and the first sealing segment 1127 is sealingly connected with the second sealing segment 1108. In the embodiment, the second shell 112 is fixed with the first shell 111 by bolts, which will not be described in detail. In another embodiment, the first sub-portion 1121 and the second sub-portion 1122 are separately provided, wherein the first sub-portion 1121 is sealingly connected with the first end portion of the first main body 1111, and the second sub-portion 1122 is sealingly connected with the first end portion of the second main body 1112. In the embodiment, the sealing manner comprises welding sealing, adhesive sealing or threaded sealing, and a sealing ring can also be provided to enhance the sealing.

[0045] Please refer to Figures 5-7The first main body 1111 comprises a second partition 1114. The housing 11 comprises a circuit board accommodating cavity 1104. Specifically, the wall forming the circuit board accommodating cavity 1104 comprises the wall of the first main body 1111. One side wall of the second partition 1114 is the bottom wall of the first accommodating cavity 1101, and the other side wall of the second partition 1114 is the bottom wall of the circuit board accommodating cavity 1104. The second partition 1114 partitions the first accommodating cavity 1101 and the circuit board accommodating cavity 1104. The circuit board is located in the circuit board accommodating cavity 1104. In the axial direction of the first rotor 142, the circuit board is located on one side of the second partition 1114, and the stator assembly 141 is located on the other side of the second partition 1114. The circuit board is electrically or signal connected with the stator assembly 141, and the circuit board provides a control signal for the stator assembly 141. The housing 11 comprises a third housing 113. The third housing 113 comprises a third sub-part 1131 and a fourth sub-part 1132. The wall forming the circuit board accommodating cavity 1104 further comprises the inner wall of the third sub-part 1131. The wall forming the valve cavity 1106 comprises the inner wall of the fourth sub-part 1132. The third sub-part 1131 and the fourth sub-part 1132 are integrally formed or separately arranged. The third sub-part 1131 is sealingly connected with the second end of the first main body 1111. The fourth sub-part 1132 is sealingly connected with the second end of the second main body 1112. In this embodiment, the third housing 113 and the first housing 111 are fixed by bolts.

[0046] The first port 1001 and the fourth port 1004 are formed in the second housing 112, and the third port 1003, the second port 1002 and the fifth port 1005 are formed in the second main body 1112. The fluid management device 10 comprises a first channel. In one specific embodiment, the first channel is located in a communication pipe for communicating the fourth port 1004 and the second port 1002. In this way, the second accommodating cavity 1102 accommodating the impeller 12 is communicated with the third accommodating cavity 1103 accommodating the valve element 13. When the fluid management device 10 is working, the fluid enters the second accommodating cavity 1102 through the first port 1001. The fluid enters the third accommodating cavity 1103 or the valve cavity 1106 through the first channel in the communication pipe under the driving of the impeller 12. The valve element 13 rotates to make the fluid flow out of the fluid management device 10 through the third port 1003 and / or the fifth port 1005. In this way, the integration of the fluid management device 10 is higher.

[0047] In another specific embodiment, the housing 11 has a first channel (not shown) having an opening in the wall forming the second receiving cavity 1102 in which the impeller 12 is located, an opening in the wall forming the third receiving cavity 1103 or the wall of the valve cavity 1106 in which the valve core 13 is located, and an opening in the wall connecting the second receiving cavity 1102 and the third receiving cavity 1103. The valve core 13 can connect at least one of the second port 1002 and the third port 1003 to the first channel. In this embodiment, the first port 1001 is an inlet of the fluid management device 10. Fluid can enter the third receiving cavity 1103 from the second receiving cavity 1102. Under the action of the valve core 13, fluid can flow out of the second port 1002 and / or the third port 1003. Compared with the above-mentioned embodiment, the first channel is built into the housing 11, which can reduce the size of the fluid management device 10, reduce leakage, and reduce the installation steps.

[0048] Referring to Figures 8-14In the embodiment, the first execution element is the impeller 22, and the second execution element is the valve core 23. Specifically, the fluid management device 20 comprises a housing 21, a motor assembly 24, the impeller 22, and the valve core 23. The motor assembly 24 comprises a stator assembly 241, a first rotor 242, and a second rotor 243. The stator assembly 241 is capable of rotating the first rotor 242, and the stator assembly 241 is capable of rotating the second rotor 243. The first rotor 242 is in driving connection with the impeller 22, and the second rotor 243 is in driving connection with the valve core 23. The fluid management device 20 has a first accommodating cavity 2101, a second accommodating cavity 2102, and a third accommodating cavity 2103. The first accommodating cavity 2101, the second accommodating cavity 2102, and the third accommodating cavity 2103 are located in the housing 21. At least part of the motor assembly 24 is located in the first accommodating cavity 2101. The impeller 22 is located in the second accommodating cavity 2102, and the valve core 23 is located in the third accommodating cavity 2103. In the axial direction of the first rotor 242, the impeller 22 is located on one side of the motor assembly 24, and the valve core 23 is located on the other side of the motor assembly 24. The impeller 22 and the valve core 23 are located on different sides of the motor assembly 24. In the embodiment, the fluid management device 20 has a first port 2001, a second port 2002, a third port 2003, a fourth port 2004, and a fifth port 2005. The first port 2001 and the fourth port 2004 are respectively in communication with the second accommodating cavity 2102. The second port 2002, the third port 2003, and the fifth port 2005 are capable of being in communication with the third accommodating cavity 2103. The valve core 23 is capable of making at least one of the third port 2003 and the second port 2002 in communication with the fifth port 2005. The stator assembly 241 of the fluid management device 20 is capable of respectively driving the first rotor 242 and the second rotor 243. The first rotor 242 and the second rotor 243 are respectively in driving connection with the impeller 22 and the valve core 23. In the axial direction of the first rotor 242, the impeller 22 and the valve core 23 are located on different sides of the stator assembly 241. Such a fluid management device 20 has reasonable impeller 22 and valve core 23 layout, compact structure, and is conducive to the miniaturization of the fluid management device 20.

[0049] The shell 21 comprises a first shell 211, a second shell 212 and a third shell 213, the second shell 212 is sealingly connected with a first end of the first shell 211, the wall forming the second accommodating cavity 2102 comprises the inner wall of the second shell 212, the third shell 213 is sealingly connected with a second end of the first shell 211, the wall forming the third accommodating cavity 2103 comprises the inner wall of the third shell 213. Alternatively, along the axial direction of the first rotor 242, at least part of the second shell 212 is located on one side of the first shell 211, at least part of the third shell 213 is located on the other side of the first shell 211, the second shell 212 and the third shell 213 are located on different sides of the first shell 211. In the embodiment, the first port 2001 and the fourth port 2004 are located on the second shell 212, the second port 2002, the third port 2003 and the fifth port 2005 are located on the first shell 211; the first shell 211 and the second shell 212 are fixedly connected by bolts, and the first shell 211 and the third shell 213 are fixedly connected by bolts.

[0050] In the embodiment, the first shell 211 comprises a first isolation portion 2113, a first main body 2111 and a second main body 2112, and the first main body 2111 and the second main body 2112 are distributed along the axial direction of the first rotor 242. In a specific embodiment, the first isolation portion 2113, the first main body 2111 and the second main body 2112 are integrated, and such a first shell 211 has the advantages of convenient installation and reduced leakage. In another embodiment, the first isolation portion 2113, the first main body 2111 and the second main body 2112 are separate structures, wherein the first isolation portion 2113 is sealingly connected with one end of the first main body 2111 away from the impeller 22, and the second main body 2112 is sealingly connected with one end of the first isolation portion 2113 close to the impeller 22. Of course, the second main body 2112 can also be sealingly connected with one end of the first main body 2111, and such a first shell 211 has the advantage of simple processing. In addition, the first isolation portion 2113 can also be integrated with one of the first main body 2111 and the second main body 2112, and the first main body 2111 and the second main body 2112 are separate structures, and the first isolation portion 2113 is sealingly connected with the other one.

[0051] Along the axial direction of the first rotor 242, the first accommodating cavity 2101 is located at one side of the first isolation part 2113, and the third accommodating cavity 2103 is located at the other side of the first isolation part 2113, the first accommodating cavity 2101 and the third accommodating cavity 2103 are located at different sides of the first isolation part 2113, wherein the third accommodating cavity 2103 comprises a valve cavity. Specifically, the first accommodating cavity 2101 has an opening facing away from the first isolation part 2113 at the first main body 2111, or in other words, the first accommodating cavity 2101 has an opening facing the impeller 22 at the first main body 2111, the wall forming the first accommodating cavity 2101 comprises the first side wall of the first isolation part 2113 and the inner wall of the first main body 2111, wherein the first side wall of the first isolation part 2113 is the bottom wall of the first accommodating cavity 2101, the third accommodating cavity 2103 has an opening facing away from the first isolation part 2113 at the second main body 2112, or in other words, the third accommodating cavity 2103 has an opening facing the valve core 23 at the second main body 2112, the wall forming the third accommodating cavity 2103 comprises the second side wall of the first isolation part 2113 and the inner wall of the second main body 2112, wherein the second side wall of the first isolation part 2113 is the bottom wall of the third accommodating cavity 2103.

[0052] Please refer to Figure 13 , the fluid management device 20 comprises a first shaft 261, the first isolation part 2113 has a first accommodating hole, the first shaft 261 is fixedly connected or limitingly connected with the second rotor 243, the first shaft 261 is fixedly connected or limitingly connected or drivingly connected with the valve core 23, specifically, part of the first shaft 261 is located in the first accommodating hole of the first isolation part 2113, the first shaft 261 is sealingly arranged with the wall of the first accommodating hole, one end of the first shaft 261 is integrally structured or fixedly connected or limitingly connected with the second rotor 243, the other end of the first shaft 261 is located in the third accommodating cavity 2103 and is fixedly connected or limitingly connected or drivingly connected with the valve core 23 located in the third accommodating cavity 2103. In one specific embodiment, the valve core 23 has an assembly part, the assembly part is fixedly connected or limitingly connected with the first shaft 261, at this time the first shaft 261 is directly connected with the valve core 23, so that the rotation of the valve core 23 is relatively synchronous with the second rotor 243, and the rotation adjustment of the valve core 23 is relatively simple. In another specific embodiment, please refer to Figure 14, the third accommodating cavity 2103 includes a first sub-cavity 2105 and a valve cavity 2106, wherein the wall forming the first sub-cavity 2105 includes the second side wall of the second isolation part 2114, specifically, the first shell 211 includes the second isolation part 2114, the second isolation part 2114 has an accommodating hole accommodating the second shaft 262, and the second shaft 262 is sealingly arranged with the wall of the accommodating hole of the second isolation part 2114, along the axial direction of the second shaft 262, the first sub-cavity 2105 is located on one side of the second isolation part 2114, and the valve cavity 2106 is located on the other side of the second isolation part 2114 opposite to the one side. At least part of the transmission component 27 is located in the first sub-cavity 2105, the transmission component 27 includes an intermediate tooth part 273, a first tooth part 271, and a second tooth part 272, the first tooth part 271 is fixedly connected or limitingly connected with the first shaft 261, the second tooth part 272 is fixedly connected or limitingly connected with the second shaft 262, the intermediate tooth part 273 is in transmission connection with the first tooth part 271, and the intermediate tooth part 273 is in transmission connection with the second tooth part 272, the transmission component 27 is provided with the intermediate tooth part 273, so that the rotation speed or torque of the valve core 23 can be adjusted, and the adaptability of the fluid management device 20 is improved. In other embodiments, the fluid management device 20 further includes the transmission component 27 and the second shaft 262, the second shaft 262 is fixedly connected or limitingly connected with the assembly part of the valve core 23, the transmission component 27 is located in the third accommodating cavity 2103, the transmission component 27 includes the first tooth part 271 and the second tooth part 272, wherein the first tooth part 271 is fixedly connected or limitingly connected with the first shaft 261, the second tooth part 272 is fixedly connected or limitingly connected with the second shaft 262, and the first tooth part 271 is in meshing with the second tooth part 272, at this time, the first tooth part 271 is directly in transmission connection with the second tooth part 272, that is, the first tooth part 271 is directly in transmission connection with the second tooth part 272 through the second shaft 262. Figure 14 Compared with the embodiments of the fluid management device 20, the main difference is that the intermediate tooth part 273 is not included.

[0053] Please refer to Figure 13The fluid management device 20 comprises an isolation sleeve 25, which isolates the first rotor 242 from the second rotor 243 and the stator assembly 241, or in other words, the isolation sleeve 25 isolates the cavity in which the first rotor 242 is located from the cavity in which the stator is located. Specifically, at least part of the isolation sleeve 25 is located in the first accommodating cavity 2101, at least part of the first rotor 242 is located in the inner periphery of the isolation sleeve 25, the stator assembly 241 and the second rotor 243 are located in the outer periphery of the isolation sleeve 25, and the isolation sleeve 25 is sealingly connected to the first main body 2111. More specifically, the isolation sleeve 25 comprises an ear portion 251 and a main body portion 252, the main body portion 252 is located in the first accommodating cavity 2101, the main body portion 252 has a concave cavity, the first rotor 242 is located in the concave cavity, the concave cavity is open towards the impeller 22, the ear portion 251 extends from the concave cavity opening of the main body portion 252 along the radial direction of the first accommodating cavity 2101, and the ear portion 251 is sealingly connected to the inner wall of the first main body 2111. In this way, the fluid in the second accommodating cavity 2102 cannot enter the cavity in which the stator assembly 241 is located, preventing the stator assembly 241 from being damaged by the fluid and helping to improve the service life of the fluid management device 20.

[0054] Please refer to Figure 11 The fluid management device 20 can also comprise a circuit board 28, which is electrically and / or signal connected to the stator assembly 241. The housing 21 comprises a fourth housing 214, which has a circuit board accommodating cavity 2104, the walls forming the circuit board accommodating cavity 2104 comprise the side wall of the first housing 211 and the inner wall of the fourth housing 214, the first housing 211 is fixedly or limitingly connected to the fourth housing 214, and the circuit board is located in the circuit board accommodating cavity 2104. In this way, the structure of the fluid management device 20 is relatively compact, which is conducive to miniaturization. Of course, the fluid management device 20 can also not comprise a circuit board.

[0055] In this embodiment, the fluid management device 20 can also comprise a communication portion having a first passage, which is used to communicate the third port 2003 and the fourth port 2004. In this way, the second accommodating cavity 2102 accommodating the impeller 22 is in communication with the third accommodating cavity 2103 accommodating the valve core 23, and when the fluid management device 20 is working, the fluid enters the second accommodating cavity 2102 from the first port 2001, the fluid enters the third accommodating cavity 2103 from the second accommodating cavity 2102 under the drive of the impeller 22, and the valve core 23 rotates to make the fluid flow out of the fluid management device 20 from the third port 2003 and / or the fifth port 2005. In this way, the integration of the fluid management device 20 is higher.

[0056] Please refer to Figures 15-24In the embodiment, the first execution element is the first impeller 32, and the second execution element is the second impeller 33. Specifically, the fluid management device 30 includes a housing 31, a motor assembly 34, the first impeller 32, and the second impeller 33, the fluid management device 30 has a first accommodating cavity 3101, a second accommodating cavity 3102, and a third accommodating cavity 3103, the first accommodating cavity 3101, the second accommodating cavity 3102, and the third accommodating cavity 3103 are located in the housing 31, at least part of the motor assembly 34 is located in the first accommodating cavity 3101, the first impeller 32 is located in the second accommodating cavity 3102, and the second impeller 33 is located in the third accommodating cavity 3103; along the axial direction of the first rotor 342, the first impeller 32 is located on one side of the stator assembly 341, and the second impeller 33 is located on the opposite side of the stator assembly 341, or in other words, the second accommodating cavity 3102 is located on one side of the first accommodating cavity 3101, and the third accommodating cavity 3103 is located on the other side of the first accommodating cavity 3101; the motor assembly 34 includes a stator assembly 341, a first rotor 342, and a second rotor 343, and along the radial direction of the first accommodating cavity 3101, at least part of the first rotor 342 and at least part of the second rotor 343 are located on the inner periphery of the stator assembly 341. When the fluid management device 30 is working, the stator assembly 341 can drive the first rotor 342 to rotate, the stator assembly 341 can drive the second rotor 343 to rotate, the first rotor 342 is in transmission connection with the first impeller 32, and then the first impeller 32 can drive the fluid in the second accommodating cavity 3102 to flow, the second rotor 343 is in transmission connection with the second impeller 33, and then the first impeller 32 can drive the fluid in the third accommodating cavity 3103 to flow. The fluid management device 30 has a first port 3001, a second port 3002, a third port 3003, and a fourth port 3004, wherein the first port 3001 and the fourth port 3004 are in communication with the second accommodating cavity 3102, the second port 3002 and the third port 3003 are in communication with the third accommodating cavity 3103, and when the fluid management device 30 is working, one of the first port 3001 and the fourth port 3004 is an inlet of the fluid management device 30, and the other is an outlet of the fluid management device 30. One of the second port 3002 and the third port 3003 is another inlet of the fluid management device 30, and the other is another outlet of the fluid management device 30. The stator assembly 341 of the fluid management device 30 can drive the first rotor 342 and the second rotor 343 to act, respectively, the first rotor 342 and the second rotor 343 are in transmission connection with the first impeller 32 and the second impeller 33, respectively, or in other words, the fluid management device 30 can control the first impeller 32 and the second impeller 33 to act, respectively, realizing the integration of two pumps and having the advantage of high integration degree; in addition, along the axial direction of the first rotor 342, the first impeller 32 and the second impeller 33 are located on different sides of the stator assembly 341, such a fluid management device 30 has reasonable layout and compact structure, and is conducive to the miniaturization of the fluid management device 30.

[0057] Please refer to Figures 15-17 The housing 31 comprises a first housing 311, a second housing 312 and a third housing 313, along the axial direction of the first rotor 342, at least part of the second housing 312 is located on one side of the first housing 311, and at least part of the third housing 313 is located on the other side of the first housing 311, the second housing 312 is fixedly connected or limitingly connected with the first housing 311, and the third housing 313 is fixedly connected or limitingly connected with the first housing 311, the connection mode includes bonding, welding or bolt connection or threaded connection, in the embodiment, the connection mode is bolt connection. The wall forming the first accommodating cavity 3101 comprises the inner wall of the first housing 311, the first accommodating cavity 3101 has a port toward the second housing 312 in the first housing 311, the first accommodating cavity 3101 has a port toward the third housing 313 in the first housing 311, at least part of the motor assembly 34 is located in the first accommodating cavity 3101, the wall forming the second accommodating cavity 3102 comprises the second housing 312, the wall forming the third accommodating cavity 3103 comprises the third housing 313, the first port 3001 and the second port 3002 are formed in the second housing 312, the third port 3003 and the fourth port 3004 are formed in the third housing 313, of course, the first port 3001, the second port 3002, the third port 3003 and the fourth port 3004 can also be located in a pipe fixedly connected or limitingly connected with the housing 31, and no longer be described in detail.

[0058] Please refer to Figure 24 The cooperation of the isolation sleeve 35 and the housing is described in Figure 19, the fluid management device 30 comprises an isolation sleeve 35, in one embodiment, the isolation sleeve 35 is made of soft material, which facilitates the installation of the isolation sleeve 35, the isolation sleeve 35 is used to isolate the cavity where the stator assembly 341 is located from the cavities where the first rotor 342 and the second rotor 343 are located. Specifically, the isolation sleeve 35 comprises a first sub-portion 3501, a second sub-portion 3502 and a third sub-portion 3503, the first sub-portion 3501, the second sub-portion 3502 and the third sub-portion 3503 are integrated, wherein the second sub-portion 3502 is in the shape of a hollow cylinder, the first sub-portion 3501 extends from one end of the second sub-portion 3502 along the radial direction of the first accommodating cavity 3101, the third sub-portion 3503 extends from the other end of the second sub-portion 3502 along the radial direction of the first accommodating cavity 3101, the second sub-portion 3502 extends from the first sub-portion 3501 to the third sub-portion 3503 along the axial direction of the first accommodating cavity 3101, at least part of the second sub-portion 3502 is located in the first accommodating cavity 3101, the stator assembly 341 is located at the outer periphery of the second sub-portion 3502, the first rotor 342 and the second rotor 343 are located at the inner periphery of the second sub-portion 3502. In another embodiment, the isolation sleeve 35 comprises a first sub-piece 3510 and a second sub-piece 3520, the first sub-piece 3510 and the second sub-piece 3520 are separate, wherein the first sub-piece 3510 comprises the first sub-portion 3501 and part of the second sub-portion 3502, the second sub-piece 3520 comprises the third sub-portion 3503 and another part of the second sub-portion 3502, the part of the second sub-portion 3502 and the other part of the second sub-portion 3502 are sealingly connected, the sealing manner comprises threaded connection or adhesion or a sealing ring is arranged between the two to enhance the sealing. When installing the isolation sleeve 35, the first sub-piece or the second sub-piece 3520 is installed first, and then the second sub-piece 3520 and the first sub-piece 3510 are sealingly connected. Along the axial direction of the first rotor 342, the first sub-portion 3501 is located between the first housing 311 and the second housing 312, the first housing 311 and the second housing 312 are fixed by bolts, thereby compressing the first sub-portion 3501 to achieve the sealing connection of the first sub-portion 3501 with the first housing 311 and the second housing 312. The third sub-portion 3503 is located between the first housing 311 and the third housing 313, the first housing 311 and the third housing 313 are fixed by bolts, thereby compressing the second sub-portion 3502 to achieve the sealing connection of the third sub-portion 3503 with the first housing 311 and the third housing 313.

[0059] In another embodiment, please refer to Figures 19-23The fluid management device 30 comprises two isolation sleeves, i.e. a first isolation sleeve 351 and a second isolation sleeve 352. The first isolation sleeve 351 comprises a first sub-portion 3501 and a first cylinder portion 3511. The first cylinder portion 3511 has a bottom at an end opposite to the first sub-portion 3501 and is open at another end and the opening faces the first impeller 32. The first rotor 342 is located at an inner periphery of the first cylinder portion 3511. The stator assembly 341 and the second isolation sleeve 352 are located at an outer periphery of the first cylinder portion 3511. The first sub-portion 3501 is sealingly connected with the first housing 311 and the second housing 312. The second isolation sleeve 352 comprises a second sub-portion 3502, a second cylinder portion 3521 and a third cylinder portion 3522. The second sub-portion 3502, the second cylinder portion 3521 and the third cylinder portion 3522 are integrated. The second cylinder portion 3521 has an opening at an end close to the first sub-portion 3501 and has a bottom. The first cylinder portion 3511 is located at an inner periphery of the second cylinder portion 3521. The second cylinder portion 3521 is located at an inner periphery of the third cylinder portion 3522. The third cylinder portion 3522 is open at an end opposite to the second impeller 33. The opening of the second cylinder portion 3521 is opposite to the opening of the third cylinder portion 3522. At least a portion of the second rotor 343 is located between the second cylinder portion 3521 and the third cylinder portion 3522 along a radial direction of the first accommodating cavity 3101. The second sub-portion 3502 is sealingly connected with the first housing 311 and the third housing 313. The fluid management device 30 comprises the first isolation sleeve 351 and the second isolation sleeve 352, which facilitates installation of the isolation sleeve 35 and can enhance sealing performance.

[0060] Please refer to Figure 16 In the embodiment, the circuit board 38 of the fluid management device 30 is electrically or signal connected with the stator assembly 341. The housing 31 comprises a fourth housing 314. The housing has a circuit board accommodating cavity 3104. The circuit board is located in the circuit board accommodating cavity 3104. Walls forming the circuit board accommodating cavity 3104 comprise side walls of the first housing 311 and walls of the fourth housing 314. The first housing 311 is fixedly or limitingly connected with the third housing 313. Thus, the structure of the fluid management device 30 is relatively compact, which is conducive to miniaturization. Of course, the fluid management device 30 can also not comprise the circuit board, which will not be described in detail.

[0061] Please refer to Figures 25-29In the embodiment, the first actuating element is the second spool 43, the second actuating element is the first spool 42, specifically, the fluid management device 40 comprises a housing 41, a motor assembly 44, the first spool 42 and the second spool 43, the motor assembly 44 comprises a stator assembly 441, a first rotor 442 and a second rotor 443, the stator assembly 441 is capable of rotating the first rotor 442, the stator assembly 441 is capable of rotating the second rotor 443, the first rotor 442 is in transmission connection with the second spool 43, the second rotor 443 is in transmission connection with the first spool 42, the fluid management device 40 has a first accommodating cavity 4101, a second accommodating cavity 4102 and a third accommodating cavity 4103, the first accommodating cavity 4101, the second accommodating cavity 4102 and the third accommodating cavity 4103 are located in the housing, at least part of the motor assembly 44 is located in the first accommodating cavity 4101, the first spool 42 is located in the third accommodating cavity 4103, and the second spool 43 is located in the second accommodating cavity 4102; along the axial direction of the first rotor 442, the first spool 42 is located on one side of the stator assembly 441, and the second spool 43 is located on the other side of the stator assembly 441; the fluid management device 40 comprises a first port 4001, a second port 4002, a third port 4003, a fourth port 4004, a fifth port 4005 and a sixth port 4006, the first port 4001, the fourth port 4004 and the sixth port 4006 are capable of communicating with the second accommodating cavity 4102, the second port 4002, the third port 4003 and the fifth port 4005 are capable of communicating with the third accommodating cavity 4103, the second spool 43 is capable of making at least one of the fourth port 4004 and the sixth port 4006 communicate with the first port 4001, and the first spool 42 is capable of making at least one of the third port 4003 and the fifth port 4005 communicate with the second port 4002. The stator assembly 441 of the fluid management device 40 is capable of respectively driving the first rotor 442 and the second rotor 443, the second rotor 443 and the first rotor 442 are respectively in transmission connection with the first spool 42 and the second spool 43, the stator assembly 441 of the fluid management device 40 is capable of respectively controlling the first spool 42 and the second spool 43 to act, and has the advantages of high integration; along the axial direction of the first rotor 442, the first spool 42 and the second spool 43 are located on different sides of the stator assembly 441, the first spool 42 and the second spool 43 of such a fluid management device 40 are reasonably arranged, the assembly of the first spool 42 and the second spool 43 is facilitated, the structure is compact, and the miniaturization of the fluid management device 40 is facilitated.

[0062] See Figures 24-26 and Figure 29, the housing 41 comprises a first housing 411, the wall forming the first accommodating cavity 4101 comprises the first housing 411, the housing 41 comprises a first isolation part 4113 and a second isolation part 4114, the first isolation part 4113 relatively isolates the first accommodating cavity 4101 and the third accommodating cavity 4103, the second isolation part 4114 relatively isolates the first accommodating cavity 4101 and the second accommodating cavity 4102, along the axial direction of the first rotor 442, the third accommodating cavity 4103 is located on one side of the first isolation part 4113, the first accommodating cavity 4101 is located on the opposite side of the first isolation part 4113, the first accommodating cavity 4101 is located on one side of the second isolation part 4114, and the second accommodating cavity 4102 is located on the opposite side of the second isolation part 4114, or in other words, the first accommodating cavity 4101 is located between the first isolation part 4113 and the second isolation part 4114. The first housing 411 comprises a first main body 4111, a second main body 4112 and a third main body 4117, along the axial direction of the first rotor 442, the first main body 4111, the second main body 4112 and the third main body 4117 are distributed along the axial direction of the first rotor 442, wherein the second main body 4112 is located on one side of the first main body 4111, the third main body 4117 is located on the other side of the first main body 4111, at least part of the first accommodating cavity 4101 is located in the first main body 4111, at least part of the third accommodating cavity 4103 is located in the second main body 4112, and at least part of the second accommodating cavity 4102 is located in the third main body 4117, the wall forming the first accommodating cavity 4101 comprises a first side wall of the first isolation part 4113 and a second side wall of the second isolation part 4114, the second accommodating cavity 4102 has a mouth facing away from the second isolation part 4114, the wall forming the second accommodating cavity 4102 comprises the second side wall of the second isolation part 4114, the third accommodating cavity 4103 has a mouth facing away from the first isolation part 4113, and the wall forming the third accommodating cavity 4103 comprises the second side wall of the first isolation part 4113. In a specific embodiment, the first isolation part 4113, the first main body 4111 and the second main body 4112 are in an integral structure, the third main body 4117 is in an integral structure or sealed connection with the second isolation part 4114, and the second isolation part 4114 or the third main body 4117 is sealed with the first main body 4111. The first main body 4111 has the first accommodating cavity 4101, the second main body 4112 has the second accommodating cavity 4102, the third main body 4117 has the third accommodating cavity 4103, the wall forming the first accommodating cavity 4101 comprises a first side wall of the first isolation part 4113 and a second side wall of the second isolation part 4114, the second accommodating cavity 4102 has a mouth facing away from the first isolation part 4113, the wall forming the second accommodating cavity 4102 comprises the second side wall of the first isolation part 4113, the third accommodating cavity 4103 has a mouth facing away from the second isolation part 4114, and the wall forming the third accommodating cavity 4103 comprises the second side wall of the second isolation part 4114.The first isolation portion 4113, the first main body 4111 and the second main body 4112 are in an integrated structure, facilitating assembly and reducing leakage.

[0063] The shell 41 further comprises a second shell 412 and a third shell 413, the second shell 412 being sealingly connected to one end of the second main body 4112, and the wall forming the second accommodating cavity 4102 comprising the inner wall of the second shell 412, and the third shell 413 being sealingly connected to one end of the second main body 4112, and the wall forming the third accommodating cavity 4103 comprising the inner wall of the third shell 413. The shell 41 has a circuit board accommodating cavity 4104, the wall forming the circuit board accommodating cavity 4104 comprising the side wall of the first shell 411 and the fourth shell 414, the first shell 411 being sealingly connected to the fourth shell 414; the fluid management device 40 comprises a circuit board 48, the circuit board 48 being located in the circuit board accommodating cavity 4104, and the circuit board 48 being electrically or signal connected to the stator assembly 441. The first port 4001, the fourth port 4004 and the sixth port 4006 are formed in the third main body 4117, and the second port 4002, the third port 4003 and the fifth port 4005 can be formed in the second main body 4112.

[0064] Please refer to Figure 29 The fluid management device 40 comprises a first shaft 461 and a second shaft 462. In the embodiment, one end of the first shaft 461 is fixedly connected or positionally connected to the first assembly portion of the first valve core 42, the wall forming the third accommodating cavity 4103 comprising the wall of the first isolation portion 4113 and the inner wall of the third shell 413, the first isolation portion 4113 having a first accommodating hole, part of the first shaft 461 being located in the first accommodating hole of the first isolation portion 4113, the first shaft 461 being sealingly arranged with the wall of the first accommodating hole, and the other end of the first shaft 461 being in an integrated structure or fixedly connected or positionally connected to the second rotor 443, so that when the second rotor 443 rotates, the second rotor 443 can drive the first valve core 42 to act. One end of the second shaft 462 is fixedly connected or positionally connected to the second assembly portion of the second valve core 43, the wall forming the second accommodating cavity 4102 comprising the wall of the second isolation portion 4114 and the inner wall of the second shell 412, the second isolation portion 4114 having a second accommodating hole, part of the second shaft 462 being located in the second accommodating hole of the second isolation portion 4114, the second shaft 462 being sealingly arranged with the wall of the second accommodating hole, and the other end of the second shaft 462 being fixedly connected or positionally connected or in an integrated structure with the first rotor 442, so that when the first rotor 442 rotates, the first rotor 442 can drive the second valve core 43 to act.

[0065] The fluid management device 40 can further comprise a first transmission component 47, a first valve rod 463, and a third isolation portion 4115. In this embodiment, the first valve rod 463 is fixedly connected or positionally connected to the first assembly portion of the first valve core 42. The third accommodating cavity 4103 comprises a first sub-cavity 4105 and a first valve cavity 4106. Along the axial direction of the first valve rod 463, the first sub-cavity 4105 is located on one side of the third isolation portion 4115, and the first valve cavity 4106 is located on the other side of the third isolation portion 4115. At least part of the first transmission component 47 is located in the first sub-cavity 4105. The first transmission component 47 comprises a first tooth portion 471 and a second tooth portion 472. The first tooth portion 471 is fixedly connected or positionally connected to the first shaft 461, and the second tooth portion 472 is fixedly connected or positionally connected to the first valve rod 463. The first tooth portion 471 and the second tooth portion 472 are directly or indirectly transmissionally connected. The first transmission component 47 is provided to facilitate adjustment of the rotational speed and torque of the valve core. The transmission component can further comprise an intermediate tooth portion, which will not be described in detail.

[0066] Similarly, the fluid management device 40 further comprises a second transmission component 49, a second valve rod 464, and a fourth isolation portion 4116. In this embodiment, the second valve rod 464 is fixedly connected or positionally connected to the second assembly portion. The second accommodating cavity 4102 comprises a second sub-cavity 4106 and a second valve cavity 4107. Along the axial direction of the second valve rod 464, the second sub-cavity 4106 is located on one side of the fourth isolation portion 4116, and the second valve cavity 4107 is located on the other side of the fourth isolation portion 4116. The fluid management device 40 comprises a second transmission component 49. At least part of the second transmission component 49 is located in the second sub-cavity 4106. The second transmission component 49 comprises a third tooth portion 491 and a fourth tooth portion 492. The third tooth portion 491 is fixedly connected or positionally connected to the second shaft 462, and the fourth tooth portion 492 is fixedly connected or positionally connected to the second valve rod 464. The third tooth portion 491 and the fourth tooth portion 492 are directly or indirectly transmissionally connected. The second transmission component 49 is provided to facilitate adjustment of the rotational speed and torque of the valve core. The transmission component can further comprise another intermediate tooth portion, which will not be described in detail.

[0067] In other embodiments, the first isolation portion 4113, the first main body 4111, and the second main body 4112 are in a separate structure. The first isolation portion 4113 is sealingly connected to the end of the first main body 4111 that is away from the first valve core 42. The second main body 4112 is sealingly connected to the first isolation portion 4113 or sealingly connected to the end of the first main body 4111 that is away from the second valve core 43. The second isolation portion 4114 is in an integral structure with at least one of the first main body 4111 and the third main body 4117. This can reduce the installation steps and reduce leakage.

[0068] In addition, the first body 4111 and the second body 4112 are in a split structure, the first isolation part 4113 is in an integral structure with one of the first body 4111 and the first body 4111, the first isolation part 4113 is in a sealed connection with the other one, and the second isolation part 4114 is in a sealed connection with the first body 4111 and the third body 4117 respectively, so that the installation steps can be reduced and the leakage can be reduced.

[0069] It should be noted that the above examples are only used to illustrate the present application and are not intended to limit the technical solutions described in the present application. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the skilled in the art can still modify or equivalently replace the present application, and all technical solutions and improvements that do not deviate from the spirit and scope of the present application should be covered within the scope of the claims of the present application.

Claims

1. A fluid management device, comprising a housing, a motor assembly, a first impeller and a second impeller, the fluid management device having a first accommodating cavity, a second accommodating cavity and a third accommodating cavity, the first accommodating cavity, the second accommodating cavity and the third accommodating cavity being located in the housing, at least part of the motor assembly being located in the first accommodating cavity, the first impeller being located in the second accommodating cavity, and the second impeller being located in the third accommodating cavity; the motor assembly comprising a stator assembly, a first rotor and a second rotor, the stator assembly being capable of rotating the first rotor, and the stator assembly being capable of rotating the second rotor, the first rotor being in driving connection with the first impeller, and the second rotor being in driving connection with the second impeller; the fluid management device comprising a first port, a second port, a third port and a fourth port, the first port and the fourth port being in communication with the second accommodating cavity, one of the first port and the fourth port being an inlet of the fluid management device, and the other being an outlet of the fluid management device, the second port and the third port being in communication with the third accommodating cavity, one of the second port and the third port being another inlet of the fluid management device, and the other being another outlet of the fluid management device; in a radial direction of the first accommodating cavity, at least part of the first rotor and at least part of the second rotor are located in an inner periphery of the stator assembly; the fluid management device comprising an isolation sleeve, the isolation sleeve comprising a first sub-portion, a second sub-portion and a third sub-portion, the second sub-portion being cylindrical, the first sub-portion and the third sub-portion extending to the second sub-portion in the radial direction of the first accommodating cavity, the second sub-portion extending from the first sub-portion to the third sub-portion in an axial direction of the first accommodating cavity, at least part of the second sub-portion being located in the first accommodating cavity, the stator assembly being located in an outer periphery of the second sub-portion, and the first rotor and the second rotor being located in an inner periphery of the second sub-portion.

2. The fluid management device of claim 1, wherein, in an axial direction of the first rotor, the first impeller is located on one side of the stator assembly, and the second impeller is located on the other side of the stator assembly; the housing comprising a first housing, a second housing and a third housing, in the axial direction of the first rotor, at least part of the second housing is located on one side of the first housing, and at least part of the third housing is located on the other side of the first housing, a wall forming the first accommodating cavity comprising an inner wall of the first housing, the first accommodating cavity having a port facing the second housing, and the first accommodating cavity having a port facing the third housing, a wall forming the second accommodating cavity comprising the second housing, and a wall forming the third accommodating cavity comprising the third housing.

3. The fluid management device of claim 2, wherein, the housing comprising a fourth housing, the housing having a circuit board accommodating cavity, a wall forming the circuit board accommodating cavity comprising a side wall of the first housing and a wall of the fourth housing, the first housing being fixedly connected or positionally connected with the third housing; the fluid management device comprising a circuit board, the circuit board being located in the circuit board accommodating cavity, and the circuit board being electrically connected or signal connected with the stator assembly.

4. The fluid management device of claim 2 or 3, wherein, The material of the isolation sleeve comprises a soft material.

5. The fluid management device of claim 4, wherein, The first sub-portion is in sealing connection with the first shell and the second shell, and is located between the first shell and the second shell along the axial direction of the first rotor; the third sub-portion is in sealing connection with the first shell and the third shell, and is located between the second shell and the third shell along the axial direction of the first rotor.

6. The fluid management device of claim 5, wherein, The first port and the fourth port are formed in the second shell, and the second port and the third port are formed in the third shell.

7. A fluid management device comprising a housing, a motor assembly, a first impeller and a second impeller, the fluid management device having a first receiving cavity, a second receiving cavity and a third receiving cavity, the first receiving cavity, the second receiving cavity and the third receiving cavity being located in the housing, at least part of the motor assembly being located in the first receiving cavity, the first impeller being located in the second receiving cavity, and the second impeller being located in the third receiving cavity; the motor assembly comprising a stator assembly, a first rotor and a second rotor, the stator assembly being capable of rotating the first rotor, and the stator assembly being capable of rotating the second rotor, the first rotor being in driving connection with the first impeller, and the second rotor being in driving connection with the second impeller; The fluid management device comprises a first port, a second port, a third port and a fourth port, the first port and the fourth port being in communication with the second receiving cavity, one of the first port and the fourth port being an inlet of the fluid management device, and the other being an outlet of the fluid management device, the second port and the third port being in communication with the third receiving cavity, one of the second port and the third port being another inlet of the fluid management device, and the other being another outlet of the fluid management device; At least part of the first rotor and the second rotor is located in the inner periphery of the stator assembly along the radial direction of the first receiving cavity; the fluid management device comprises a first isolation sleeve and a second isolation sleeve, the first isolation sleeve comprising a first sub-portion and a first cylinder portion, the first cylinder portion having a port facing the first impeller, the first rotor being located in the inner periphery of the first cylinder portion, the stator assembly and the second isolation sleeve being located in the outer periphery of the first cylinder portion; the second isolation sleeve comprising a second sub-portion, a second cylinder portion and a third cylinder portion, the second cylinder portion having a port facing the first impeller, and the third cylinder portion having a port facing the second impeller, at least part of the second rotor being located between the second cylinder portion and the third cylinder portion along the radial direction of the first receiving cavity.

8. The fluid management device of claim 7, wherein, The first impeller is located on one side of the stator assembly along the axial direction of the first rotor, and the second impeller is located on the other side of the stator assembly. The shell comprises a first shell, a second shell and a third shell, the first sub-portion is in sealed connection with the first shell and the second shell, the second sub-portion is in sealed connection with the first shell and the third shell; along the axial direction of the first rotor, at least part of the second shell is located on one side of the first shell, and at least part of the third shell is located on the other side of the first shell, the wall forming the first containing cavity comprises the inner wall of the first shell, the first containing cavity has a port facing the second shell, the first containing cavity has a port facing the third shell, the wall forming the second containing cavity comprises the second shell, and the wall forming the third containing cavity comprises the third shell.

9. The fluid management device of claim 8, wherein, The shell comprises a fourth shell, the shell has a circuit board containing cavity, the wall forming the circuit board containing cavity comprises the side wall of the first shell and the wall of the fourth shell, and the first shell is in fixed connection or position-limiting connection with the third shell. The fluid management device comprises a circuit board, the circuit board is located in the circuit board containing cavity, and the circuit board is in electrical connection or signal connection with the stator assembly.

10. The fluid management device of claim 8 or 9, wherein, The material of the isolation sleeve comprises a soft material, the first port and the fourth port are formed in the second shell, and the second port and the third port are formed in the third shell.

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