Fluid management device and thermal management system

Abstract

The fluid management device and thermal management system of this application include a connector and a fluid control unit. The connector has a first receiving cavity for accommodating the fluid control unit. The opening of the first receiving cavity is located on a first side. At least a portion of the wall of the first side is perpendicular to a first surface. The projections of the sub-channels located on the first surface of the connector do not overlap. This makes the fluid management device relatively small in size. The sub-channels are located inside the connector, which also helps to prevent leakage.

Description

Technical Field

[0001] This application relates to the field of fluid management, specifically to a fluid management device and a thermal management system. Background Technology

[0002] Thermal management systems include components such as fluid control units and sensors. These components are usually connected by multiple pipelines. As the complexity of the system increases, the number of components and connection points also increase, leading to an increased risk of leakage at these connection points and a relatively large space requirement for the thermal management system. Summary of the Invention

[0003] The purpose of this application is to provide a fluid management device and a thermal management system, which facilitates a compact structure of the fluid management device and thermal management system, while also helping to reduce leakage at the connection points.

[0004] One embodiment of this application adopts the following technical solution:

[0005] A fluid management device includes a connector and a fluid control unit. The connector includes a first receiving portion having a first receiving cavity. At least a portion of the fluid control unit is located in the first receiving cavity. The fluid control unit is fixedly connected to or limited by the connector.

[0006] The connector has a communicating channel with an opening in the wall of the first receiving portion. The connector includes a first side portion, and the first receiving cavity has an opening in the first side portion, defining a first surface. At least a portion of the wall of the first side portion is perpendicular to the first surface. The communicating channel includes a plurality of sub-channels, and the projections of the sub-channels onto the first surface do not overlap.

[0007] Another embodiment of this application adopts the following technical solution: a thermal management system, including a compressor, a throttling element, a fourth heat exchanger, and a fluid management device, wherein the fluid management device is the fluid management device described above, and the fluid management device includes a first interface, a second interface, a third interface, and a fourth interface, the outlet of the compressor is connected to the third interface, the fourth interface is connected to the second interface through the throttling unit and the fourth heat exchanger, and the first interface is connected to the inlet of the compressor.

[0008] The fluid management device and thermal management system of this application include a connector and a fluid control unit. The connector has a first receiving cavity for accommodating the fluid control unit. The opening of the first receiving cavity is located on a first side. At least a portion of the wall of the first side is perpendicular to a first surface. The projections of the sub-channels located on the first surface of the connector do not overlap. This makes the fluid management device relatively small in size. The sub-channels are located inside the connector, which also helps to prevent leakage. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural schematic diagram of the first embodiment of the fluid management device of this application from one perspective;

[0010] Figure 2 yes Figure 1 A three-dimensional structural diagram of the fluid management device from another perspective;

[0011] Figure 3 yes Figure 1 An exploded structural diagram of a fluid management device from one perspective;

[0012] Figure 4 yes Figure 1 An exploded structural diagram of a fluid management device from another perspective;

[0013] Figure 5 yes Figure 1 A three-dimensional structural diagram of the first plate of the connecting component from one perspective;

[0014] Figure 6 yes Figure 1 A three-dimensional structural diagram of the first plate of the connecting component from another perspective;

[0015] Figure 7 This is a three-dimensional structural schematic diagram of a second embodiment of the fluid management device of this application;

[0016] Figure 8 yes Figure 7 An exploded structural diagram of the fluid management device in the diagram;

[0017] Figure 9 yes Figure 7 A perspective view of the fluid management device;

[0018] Figure 10 This is a connection diagram of a thermal management system. Detailed Implementation

[0019] The fluid management device of this application can be applied to the thermal management system of a vehicle, including new energy vehicles, and the fluid is a refrigerant, including R134a, CO2, or other forms of refrigerant. The invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0020] Please see Figures 1-9One embodiment of this application provides a fluid management device 10, which includes a connector 11, a fluid control unit 12, and a sensing unit 13. The connector 11 includes a first receiving portion 1111 and a second receiving portion 1122. The first receiving portion 1111 has a first receiving cavity 1111', and at least a portion of the fluid control unit 12 is located in the first receiving cavity 1111'. The fluid control unit 12 is fixedly connected to or limitedly connected to the connector 11. The second receiving portion 1122 has a second receiving cavity 1122', and at least a portion of the sensing unit 13 is located in the second receiving cavity 1122'. The sensing unit 13 is fixedly connected to or limitedly connected to the connector 11. The connector 11 has a communication channel 1100, and the communication channel 1100 has an opening 1110 in the wall of the first receiving portion 1111. The sensing element of the sensing portion 13 is used to sense the temperature and / or pressure or other parameters of the fluid in the communication channel 1100. In one embodiment, the sensing element of the sensing portion 13 may be located in the communication channel 1100. Alternatively, the fluid management device 10 may also have a communication cavity that communicates with the communication channel 1100. The sensing element of the sensing portion 13 is located in the communication cavity. The communication cavity may be located in the connector 11 or in the sensing portion 13, which will not be described in detail here. The connector 11 includes a first side portion 1113 and a second side portion 1114. A first receiving cavity 1111' has an opening in the first side portion 1113, and a second receiving cavity 1122' has an opening in the wall of the second side portion 1114. A first surface 1001 is defined, which is perpendicular to the axis of the second receiving portion 1122. At least a portion of the wall of the first side portion 1113 is perpendicular to the first surface 1001. The connecting channel 1100 includes a plurality of sub-channels. Along the axial direction of the second receiving portion 1122, the projections of the sub-channels onto the first surface 1001 do not overlap, or in other words, the sub-channels do not intersect. Thus, the connector 11 is relatively flat in the direction perpendicular to the axis of the second receiving portion 1122, which facilitates design and manufacturing. In this embodiment, the connection method includes welding, bonding, bolting, or other connection methods. The perpendicularity described herein includes an angle range between 80° and 100°, and the parallelism described herein includes an angle range between -10° and 10°. The connector 11 has a first receiving cavity 1111' for accommodating the fluid control unit 12 and a second receiving cavity 1122' for accommodating the sensing unit 13. The opening of the first receiving cavity 1111' is located on the first side 1113, and the opening of the second receiving cavity 1122' is located on the second side 1114. At least a portion of the wall of the first side 1113 is perpendicular to the first surface 1001. The projections of the sub-channels located on the connector 11 on the first surface 1001 do not overlap. This makes the fluid management device 10 relatively small in size, and the sub-channels located inside the connector 11 also helps to prevent leakage.

[0021] Please see Figures 4-8The connector 11 includes at least two plates stacked together. Adjacent plates are fixed and sealed together. At least one of the adjacent plates has at least one communicating channel 110 inside. The adjacent plates form a communicating channel 1100 at the communicating channel 110. In this embodiment, the connector 11 includes a first plate 111 and a second plate 112. The first plate 111 and the second plate 112 are the two outermost plates of the connector 11. The first side portion 1113 and the second side portion 1114 are located on the first plate 111. It can be seen that the fluid control unit 12 and the sensing unit 13 are fixedly connected or limited to the first plate 111.

[0022] The number of sensing units 13 is greater than or equal to two, and the connector 11 has a second receiving cavity 1122' corresponding to each sensing unit 13. In this embodiment, the number of sensing units 13 is four, that is, the sensing units 13 include a first sensing unit 131, a second sensing unit 132, a third sensing unit 133 and a fourth sensing unit 134. The fluid management device 10 includes a first housing 141, a first circuit board 142, and a first connector 143. The first housing 141 is fixedly connected to or limited by a connector 11. The first circuit board 142 is located inside the first housing 141 and is fixedly connected to or limited by the first housing 141 or the connector 11. The first circuit board 142 has a surface facing the second side 1114. Each sensor 13 is electrically connected and / or signal connected to the first circuit board 142. The housing of the first connector 143 is fixedly connected to, limited by, or integrally formed with the first housing 141. The pins of the first connector 143 are electrically connected and / or signal connected to the first circuit board 142. Signals from multiple sensors 13 can be collected by the circuit board and then transmitted to a host computer or controller through the first connector 143. This reduces the number of connectors and facilitates the installation of the fluid management device 10. In other embodiments, the first circuit board 142 may be partially located in the first housing 141 and partially located in the recess formed by the connector 11, which will not be described in detail here.

[0023] Please see Figure 3The fluid control unit 12 has two or more fluid control units 12. The connector 11 has a first receiving cavity 1111' corresponding to each fluid control unit 12. The fluid management device 10 includes a second housing 151, a second circuit board 152, and a second connector 153. The second housing 151 is fixedly connected to or limited by the connector 11. At least a portion of the second circuit board 152 is located inside the second housing 151. The second circuit board 152 has a surface facing the first side 1113. Each fluid control unit 12 is electrically connected and / or signal connected to the second circuit board 152. The housing of the second connector 153 is fixedly connected to or limited by the second housing 151, or is an integral structure. The pins of the second connector 153 are electrically connected and / or signal connected to the second circuit board 152. Multiple fluid control units 12 are electrically and / or signal connected to the second circuit board 152, and the circuit board is electrically and / or signal connected to the pins of the second connector 153. The second connector 153 is used to electrically and / or signal connect to the host computer or controller. This reduces the number of second connectors 153 and the number of circuit boards, and also facilitates the installation of the fluid management device 10.

[0024] Please see Figure 3 , Figure 5 and Figure 9In one specific embodiment, the fluid control unit 12 includes a valve unit 121 and a throttling unit 122. The first side portion 1113 includes a first sub-portion 1115 and a second sub-portion 1116. The opening of the first receiving cavity 1111' corresponding to the valve unit 121 is located in the first sub-portion 1115, and the opening of the first receiving cavity 1111' corresponding to the throttling unit 122 is located in the second sub-portion 1116. Placing the valve unit 121 and the throttling unit 122 in different areas, without overlapping, facilitates the miniaturization of the fluid management device 10 and its installation. The valve unit 121 can be a solenoid valve, a ball valve, or other types of on / off valve, and the throttling unit 122 can be an electronic expansion valve, a thermostatic expansion valve, or other types of throttling valve. In this embodiment, the valve unit 121 is a solenoid valve, and the throttling unit 122 is an electronic expansion valve. In a more specific embodiment, valve unit 121 includes a first valve unit 1211, a second valve unit 1212, and a third valve unit 1213. The fluid management device 10 has a first receiving cavity 1111' corresponding to each valve unit. Each valve unit is fixedly connected to or limited by the connector 11. Throttling unit 122 includes a first throttling unit 1221 and a second throttling unit 1222. The fluid management device 10 has a first receiving cavity 1111' corresponding to each throttling unit. Each throttling unit is fixedly connected to or limited by the connector 11. A first direction is defined on a first surface. The first direction is perpendicular to the axial direction of the first receiving cavity 1111'. Along the first direction, the first throttling unit 1221 is closer to the first sub-section 1115 than the second throttling unit 1222. The third valve unit 1213 is located between the first valve unit 1211 and the second valve unit 1212. The second valve unit 1212 is closer to the second sub-section 1116 than the third valve unit 1213. Of course, in other embodiments, the number of fluid control units 12 may be two or more, which will not be described in detail here.

[0025] Please see Figure 4The fluid management device 10 further includes a heat exchange section 16, which is fixedly connected or limitedly connected to the second side portion 1114. The heat exchange section 16 includes a flow channel with an opening facing the second side portion 1114, and a connecting channel 1100 communicates with the flow channel. The heat exchange section 16 includes a plurality of stacked plates, the stacking direction of which is perpendicular to the first surface 1001. Along the axial direction of the first receiving portion 1111, the second receiving portion 1122 is closer to the first receiving portion 1111 than the heat exchange section 16. In this embodiment, the heat exchange section 16 is a plate heat exchanger, which includes a plurality of stacked plates. The flow channels of the heat exchange section 16 include a first flow channel and a second flow channel. When the heat exchange section 16 is working, the fluid in the first flow channel and the fluid in the second flow channel can exchange heat in the heat exchange section 16. The fluid in the first flow channel and the fluid in the second flow channel can be the same medium or different media. In this embodiment, the fluid in the first flow channel is a refrigerant and the fluid in the second flow channel is a coolant. The first flow channel includes a first channel, a second channel and an inter-plate channel. The first channel is connected to the second channel through the inter-plate channel. Specifically, the heat exchange section 16 includes a first heat exchanger 161, a second heat exchanger 162, and a third heat exchanger 163. Along the first direction, the third heat exchanger 163 is located on one side of the second heat exchanger 162, and the first heat exchanger 161 is located on the other side of the second heat exchanger 162. The third heat exchanger 163 and the first heat exchanger 161 are located on different sides of the second heat exchanger 162. Along the axial direction of the first receiving section 1111, the third heat exchanger 163 is closer to the second sub-section 1116 than the first heat exchanger 161, and the first heat exchanger 161 is closer to the first sub-section 1115 than the third heat exchanger 163.

[0026] Please see Figure 4 , Figures 6-9The connecting channel 1100 of the connector 11 includes a first sub-channel 1101, a second sub-channel 1102, a third sub-channel 1103, a fourth sub-channel 1104, a fifth sub-channel 1105, a sixth sub-channel 1106, and a seventh sub-channel 1107. The first sub-channel 1101 has an opening 1101' on its second side 1114 facing a first flow channel of the first heat exchanger 161. Specifically, the first sub-channel 1101 has an opening on its second side 1114 facing a first channel of the first heat exchanger 161, and the first sub-channel 1101 communicates with the first channel of the first heat exchanger 161. The second sub-channel 1102 has an opening 1102' on its second side 1114 facing the first flow channel of the first heat exchanger 161. The second sub-channel 1102 has an opening on the second side 1114 facing the second channel of the first heat exchanger 161. The second sub-channel 1102 communicates with the second channel of the first heat exchanger 161, so that the first sub-channel 1101 can communicate with the second sub-channel 1102 through the first flow channel of the first heat exchanger 161. The second sub-channel 1102 has an opening in the wall of the receiving portion that accommodates the third valve unit 1213. The second sub-channel 1102 also has an opening in the wall of the receiving portion that accommodates the second valve unit 1212. The second valve unit 1212 can connect or disconnect the second sub-channel 1102 from the third sub-channel 1103, and the third valve unit 1213 can connect or disconnect the second sub-channel 1102 from the fourth sub-channel 1104. The third sub-channel 1103 has an opening in the wall of the receiving portion accommodating the first throttling unit 1221, and an opening in the wall of the receiving portion accommodating the second throttling unit 1222. The third sub-channel 1103 can communicate with the fifth sub-channel 1105 through the first throttling unit 1221 and with the sixth sub-channel 1106 through the second throttling unit 1222. The fifth sub-channel 1105 has an opening 1105' in the second side portion 1114 towards the first flow channel of the third heat exchanger 163. Specifically, the fifth sub-channel 1105 has an opening 1105' in the second side portion 1114 towards the first channel of the third heat exchanger 163. Sub-channel 1105 is connected to the first flow channel of the third heat exchanger 163. The sixth sub-channel 1106 has an opening 1106' on the second side 1114 toward the first flow channel of the second heat exchanger 162. Specifically, the sixth sub-channel 1106 has an opening on the second side 1114 toward the first channel of the second heat exchanger 162. The sixth sub-channel 1106 is connected to the first flow channel of the second heat exchanger 162. In this way, the fluid flowing out of the second valve unit 1212 can enter the third heat exchanger 163 through the first throttling unit 1221, and / or, the fluid flowing out of the second valve unit 1212 can enter the second heat exchanger 162 through the second throttling unit 1222.In addition, the fluid management device 10 also includes a one-way component 1214, which is located inside the connector 11. The one-way component 1214 is fixedly connected or limited to the connector 11. The one-way component 1214 enables the sixth sub-channel 1106 to communicate unidirectionally with the third sub-channel 1103. The fourth sub-channel 1104 has an opening on the second side 1114 toward the first flow channel of the second heat exchanger 162. Specifically, the fourth sub-channel 1104 has an opening on the second side 1114 toward the second channel of the second heat exchanger 162. The fourth sub-channel 1104 communicates with the first flow channel of the second heat exchanger 162. In this way, the fluid flowing out of the third valve unit 1213 can enter the second heat exchanger 162. The fourth sub-channel 1104 has an opening in the wall of the receiving portion that accommodates the first valve unit 1211. The first valve unit 1211 enables the fourth sub-channel 1104 to communicate with or not communicate with the seventh sub-channel 1107. The seventh sub-channel 1107 has an opening 1107' on the second side 1114 toward the first flow channel of the third heat exchanger 163. Specifically, the seventh sub-channel 1107 has an opening on the second side 1114 toward the first channel of the third heat exchanger 163, and the seventh sub-channel 1107 communicates with the first flow channel of the third heat exchanger 163.

[0027] Please see Figure 2 and Figure 4 , Figure 9 The fluid management device 10 has a first interface 101, a second interface 102, a third interface 103, and a fourth interface 104. The first interface 101, the second interface 102, the third interface 103, and the fourth interface 104 are located on the second plate 112 or on a pipe or block that is fixedly connected or limited to the second plate 112. The first interface 101 and the second interface 102 are connected to the seventh sub-channel 1107, the third interface 103 is connected to the first sub-channel 1101, and the fourth interface 104 is connected to the third sub-channel 1103. The sensing unit 13 includes a first sensing unit 131, a second sensing unit 132, a third sensing unit 133, and a fourth sensing unit 134. The receiving cavity or connecting cavity that houses the first sensing unit 131 is connected to the first sub-channel 1101, the receiving cavity or connecting cavity that houses the second sensing unit 132 is connected to the fourth sub-channel 1104, the receiving cavity or connecting cavity that houses the third sensing unit 133 is connected to the third sub-channel 1103, and the receiving cavity or connecting cavity that houses the fourth sensing unit 134 is connected to the seventh sub-channel 1107.

[0028] A first cross section is defined, which is perpendicular to the extension direction of the connecting channel 1100. The first cross section intersects with the connecting channel 1100 to form at least one flow cross section. The area of ​​the flow cross section remains unchanged. The flow cross section includes width and depth. The depth of the flow cross section gradually increases along the flow direction of the fluid within the connecting channel 1100, and the width of the flow cross section decreases along the flow direction of the fluid within the connecting channel 1100. This helps to reduce flow resistance and reduce the volume of the fluid management device 10.

[0029] Please see Figures 1-10 One embodiment of this application also provides a thermal management system applicable to vehicles. Specifically, the thermal management system includes a compressor 1, a throttling element 2, a fourth heat exchanger 3, and a fluid management device 10. The throttling element 2 is located upstream of the fourth heat exchanger 3 and is used to throttle and reduce the pressure of the fluid flowing through the fourth heat exchanger 3. The fourth heat exchanger 3 can be a microchannel heat exchanger or a plate heat exchanger. The fluid management device 10 includes a first interface 101, a second interface 102, a third interface 103, and a fourth interface 104. The outlet of the compressor 1 is connected to the third interface 103. The fourth interface 104 is connected to the second interface 102 via a throttling unit and a first heat exchanger 161. The first interface 101 is connected to the inlet of the compressor. The fluid management device 10 includes a first heat exchanger 161, a second heat exchanger 162, and a third heat exchanger 163. All three heat exchangers are plate heat exchangers, and each heat exchanger also has a second flow channel. The fluid management device 10 further includes a first sensing unit 131, a second sensing unit 132, a third sensing unit 133, and a fourth sensing unit 134. The first sensing unit 131 is a temperature sensor used to measure the temperature at the compressor outlet. The second sensing unit 132 is located at the temperature sensor and is used to measure the subcooling of the first heat exchanger 161 or the superheat of the second heat exchanger 162. The third sensing unit 133 is a temperature and pressure sensor used to measure the superheat of the third heat exchanger 163. The fourth sensing unit 134 is a temperature and pressure sensor used to measure the subcooling of the first heat exchanger 161 or the superheat of the second heat exchanger 162.

[0030] In the heating mode of the thermal management system, the high-temperature and high-pressure refrigerant discharged from the compressor 1 enters the first heat exchanger 161 through the third interface 103 and the first sub-channel 1101. Then, the refrigerant releases heat in the first heat exchanger 161 and flows out of the first heat exchanger 161 into the second sub-channel 1102. The third valve unit 1213 is closed and the second valve unit 1212 is opened. That is, the refrigerant enters the third sub-channel 1103 through the second valve unit 1212. The second throttling unit 1222 is opened and the first throttling unit 1221 and the throttling element are closed. After the refrigerant is throttled and depressurized by the second throttling unit 1222, it enters the sixth sub-channel 1106. The refrigerant evaporates and absorbs heat in the second heat exchanger 162. Then, the refrigerant enters the compressor through the first interface 101 through the fourth sub-channel 1104 and the first valve unit 1211. In other modes of the thermal management system, the first throttling unit 1221 and / or the throttling element can also be activated, in which case the refrigerant can also evaporate and absorb heat in the third heat exchanger 163 and / or the fourth heat exchanger.

[0031] In the cooling mode of the thermal management system, the high-temperature, high-pressure refrigerant discharged from compressor 1 enters the first heat exchanger 161 through the third interface 103 and the first sub-channel 1101. The refrigerant undergoes little or no heat exchange in the first heat exchanger 161. The refrigerant flowing out of the first heat exchanger 161 enters the second sub-channel 1102. The first valve unit 1211 and the second valve unit 1212 are closed, while the third valve unit 1213 is open. That is, the refrigerant enters the fourth sub-channel 1104 via the third valve unit 1213. The refrigerant releases heat in the second heat exchanger 162, then enters the third sub-channel 1103 via the sixth sub-channel 1106 and the one-way component 1214, and finally flows out of the fluid management device 10 through the fourth interface 104. At this time, the first throttling unit 1221 and the second throttling unit 1222 are closed, and the throttling element 2 is opened. The refrigerant evaporates and absorbs heat in the fourth heat exchanger 3. The refrigerant flowing out of the fourth heat exchanger 3 enters the seventh sub-channel 1107 via the second interface 102, and then enters the compressor through the first interface 101. In other modes of the thermal management system, the first throttling unit 1221 can also be opened, in which case the refrigerant can evaporate and absorb heat in the third heat exchanger 163.

[0032] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A fluid management device, comprising a connector and a fluid control unit, wherein the connector includes a first receiving portion having a first receiving cavity, at least a portion of the fluid control unit is located in the first receiving cavity, and the fluid control unit is fixedly connected or limitedly connected to the connector; The connector has a communicating channel, and the communicating channel has an opening in the wall of the first receiving portion. The connector includes a first side portion, the first receiving cavity has an opening on the first side portion, defining a first surface, at least a portion of the wall of the first side portion is perpendicular to the first surface, and the communicating channel includes a plurality of sub-channels, the projections of the sub-channels onto the first surface do not overlap; The fluid management device includes a second housing, a second circuit board, and a second connector. The second housing is fixedly connected or limited to the connector. At least a portion of the second circuit board is located within the second housing. The second circuit board has a surface facing the first side. The fluid control unit is electrically and / or signal-connected to the second circuit board. The housing of the second connector is fixedly connected or limited to the second housing, or is an integral structure. The pins of the second connector are electrically and / or signal-connected to the second circuit board. The first side includes a first sub-part and a second sub-part. The fluid control unit includes a valve unit and a throttling unit. The opening of the first receiving cavity corresponding to the valve unit is located in the first sub-part, and the opening of the first receiving cavity corresponding to the throttling unit is located in the second sub-part. The valve unit includes a first valve unit, a second valve unit, and a third valve unit. The throttling unit includes a first throttling unit and a second throttling unit. A first direction is defined on a first surface. The first direction is perpendicular to the axial direction of the first receiving cavity. Along the first direction, the first throttling unit is closer to the first sub-part than the second throttling unit. The third valve unit is located between the first valve unit and the second valve unit. The second valve unit is closer to the second sub-part than the third valve unit.

2. The fluid management device of claim 1, wherein, The number of fluid control units is greater than or equal to two, the connector has a first receiving cavity corresponding to each fluid control unit, and each fluid control unit is electrically connected and / or signal connected to the second circuit board.

3. The fluid management device according to claim 1, characterized in that, The fluid management device includes a heat exchange section, the connector includes a second side and a second receiving section, the heat exchange section is fixedly connected to or limited to the second side, the heat exchange section includes a flow channel, the flow channel has an opening facing the second side, the connecting channel communicates with the flow channel, and the heat exchange section includes a plurality of stacked plates, the stacking direction of the plates is perpendicular to the first surface; Along the axial direction of the first receiving portion, the second receiving portion is closer to the first receiving portion than the heat exchange portion.

4. The fluid management device according to claim 3, characterized in that, The first side portion includes a first sub-part and a second sub-part; the fluid control unit includes a valve unit and a throttling unit; the opening of the first receiving cavity corresponding to the valve unit is located in the first sub-part; and the opening of the first receiving cavity corresponding to the throttling unit is located in the second sub-part; the heat exchange unit includes a first heat exchange unit, a second heat exchange unit, and a third heat exchange unit. Along the first direction, the third heat exchanger is located on one side of the second heat exchanger, and the first heat exchanger is located on the other side of the second heat exchanger. The third heat exchanger and the first heat exchanger are located on different sides of the second heat exchanger. Along the axial direction of the first receiving portion, the third heat exchanger is closer to the second sub-part than the first heat exchanger, and the first heat exchanger is closer to the second sub-part than the third heat exchanger.

5. The fluid management device of claim 4, wherein, The heat exchange section includes a first heat exchanger, a second heat exchanger, and a third heat exchanger; the valve unit includes a first valve unit, a second valve unit, and a third valve unit; and the throttling unit includes a first throttling unit and a second throttling unit. The connecting channels include a first sub-channel, a second sub-channel, a third sub-channel, a fourth sub-channel, a fifth sub-channel, a sixth sub-channel, and a seventh sub-channel. The first sub-channel has an opening on its second side facing a first flow channel of the first heat exchanger. The second sub-channel has an opening on its second side facing a first flow channel of the first heat exchanger. The second sub-channel has an opening in the wall of the receiving portion that accommodates the third valve unit. The second valve unit enables the second sub-channel to communicate with or not communicate with the third sub-channel. The third valve unit enables the second sub-channel to communicate with or not communicate with the fourth sub-channel. The third sub-channel has an opening in the wall of the receiving portion that accommodates the first throttling unit, and the third sub-channel has an opening in the wall of the receiving portion that accommodates the second throttling unit. The third sub-channel can communicate with the fifth sub-channel through the first throttling unit, and the third sub-channel can communicate with the sixth sub-channel through the second throttling unit. The fifth sub-channel has an opening on its second side facing the first flow channel of the third heat exchanger, and the sixth sub-channel has an opening on its second side facing the first flow channel of the second heat exchanger. The fluid management device further includes a one-way component that enables the sixth sub-channel to communicate unidirectionally with the third sub-channel. The fourth sub-channel has an opening on the second side toward the first flow channel of the second heat exchanger, and the fourth sub-channel has an opening in the wall of the receiving portion that accommodates the first valve unit. The first valve unit enables the fourth sub-channel to communicate with or not communicate with the seventh sub-channel, and the seventh sub-channel has an opening on the second side toward the first flow channel of the third heat exchanger.

6. The fluid management device of claim 5, wherein, The connector includes at least two plates stacked together. Adjacent plates are fixed and sealed together. At least one of the adjacent plates has at least one communicating channel inside. The adjacent plates form the communicating channel at the communicating channel. The connector includes a first plate and a second plate, with the first side and the second side located on the first plate. The fluid management device has a first interface, a second interface, a third interface, and a fourth interface. The first interface, the second interface, the third interface, and the fourth interface are located on the second plate or on a pipe or block that is fixedly connected or limited to the second plate. The first interface and the second interface are connected to the seventh sub-channel, the third interface is connected to the first sub-channel, and the fourth interface is connected to the third sub-channel.

7. The fluid management device according to claim 6, characterized in that, The fluid management device includes a sensing unit, which comprises a first sensing unit, a second sensing unit, a third sensing unit, and a fourth sensing unit. A receiving cavity or connecting cavity accommodating the first sensing unit is connected to a first sub-channel, a receiving cavity or connecting cavity accommodating the second sensing unit is connected to the fourth sub-channel, a receiving cavity or connecting cavity accommodating the third sensing unit is connected to the third sub-channel, and a receiving cavity or connecting cavity accommodating the fourth sensing unit is connected to the seventh sub-channel.

8. The fluid management device of claim 7, wherein, Define a first cross section, which is perpendicular to the extension direction of the connecting channel. The first cross section intersects the connecting channel to form at least one flow cross section. The area of ​​the flow cross section remains constant. The flow cross section includes a width and a depth. The depth of the flow cross section gradually increases along the flow direction of the fluid within the connecting channel, and the width of the flow cross section decreases along the flow direction of the fluid within the connecting channel.

9. A thermal management system, comprising a compressor, a throttling element, a fourth heat exchanger, and a fluid management device, wherein the fluid management device is the fluid management device according to any one of claims 1-8, the fluid management device comprising a first interface, a second interface, a third interface, and a fourth interface, wherein the outlet of the compressor is connected to the third interface, the fourth interface is connected to the second interface through the throttling element and the fourth heat exchanger, and the first interface is connected to the inlet of the compressor.

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