CN114623633A - Fluid management device and thermal management system - Google Patents

Abstract

The fluid management device comprises a connecting part, a valve unit and a throttling unit, wherein the valve unit and the throttling unit are assembled into a whole through the connecting part, the fluid management device is connected with a thermal management system as a whole and is convenient to assemble with the thermal management system, a communicating channel is arranged on the connecting part, the on-off of the communicating channel is controlled by the opening and closing of the valve unit, the flow is regulated through the throttling unit, and the communicating channel is formed in the connecting part, so that the leakage of the fluid management device is reduced because the connecting point of the communicating channel is in the connecting part.

Description

Fluid management device and thermal management system

Technical Field

The present application relates to the field of fluid management, and more particularly to a fluid management device and a thermal management system.

Background

The heat management system comprises parts such as a liquid storage part, a heat exchange part and a throttling part, and the parts are usually connected through a plurality of pipelines, so that the number of the parts is increased along with the increase of the complexity of the system, the number of connecting points is increased, the leakage risk of the heat management system at the connecting points is increased, and the assembly is inconvenient.

Disclosure of Invention

An object of the present application is to provide a fluid management device and a thermal management system, which can facilitate the assembly of the thermal management system and reduce the leakage at the joint.

One embodiment of the present application adopts the following technical solutions: a fluid management device comprises a connecting part, a throttling unit, a heat exchanging part and a liquid storage part, wherein the heat exchanging part comprises a first heat exchanger, the first heat exchanger is provided with a first flow channel and a second flow channel, the first flow channel and the second flow channel are not communicated relatively, and the first heat exchanger is fixedly connected or in limited connection with the connecting part; the fluid management device is provided with a liquid storage cavity, the connecting part comprises a mounting part, the mounting part comprises a first mounting part and a second mounting part, the first mounting part is fixedly connected or in limited connection with the liquid storage part, at least part of the liquid storage cavity is positioned in the liquid storage part, and at least part of the throttling unit is positioned in a mounting hole of the second mounting part;

the connecting portion has a first communicating channel formed with an opening at the first mounting portion, a second communicating channel communicated with the reservoir, a third communicating channel formed with an opening at the second mounting portion, the first communicating channel communicated with the second communicating channel through the first flow passage, and a fourth communicating channel communicated with the fourth communicating channel through the second flow passage.

Another embodiment of the present application adopts the following technical solutions: a thermal management system comprising a compressor, a fluid management device, a fourth heat exchanger and a fifth heat exchanger, the fluid management device comprising the fluid management device described above, the fluid management device having a first inlet, a second inlet, a third inlet, a first outlet, a second outlet and a third outlet, the outlet of the compressor being in communication with the first inlet, the inlet of the compressor being in communication with the first outlet, the second outlet being in communication with the second inlet through the fourth heat exchanger, the third outlet being in communication with the third inlet through the fifth heat exchanger.

The utility model provides a fluid management device and thermal management system, through the connecting part with valve unit, the equipment of throttle unit is a whole, fluid management device is connected with thermal management system as a whole, it is convenient with the thermal management system equipment, through set up communicating channel at connecting portion, utilize the switching control of valve unit to communicate the break-make of passageway and adjust the flow through the throttle unit, because communicating channel forms in connecting portion, communicating channel's tie point is located the inside of connecting portion, fluid management device's the revealing has been reduced.

Drawings

FIG. 1 is a perspective view of a first embodiment of a fluid management device of the present application;

FIG. 2 is a perspective view of another perspective of the first embodiment of the fluid management device of the present application;

FIG. 3 is an exploded schematic view from one perspective of the fluid management device of FIG. 1;

FIG. 4 is an exploded view of another perspective of the fluid management device of FIG. 1;

FIG. 5 is a schematic top view of the connection portion of FIG. 1;

FIG. 6 is a schematic sectional view A-A of the joint of FIG. 5;

FIG. 7 is a schematic view of a cross-sectional structure B-B of the joint of FIG. 5;

FIG. 8 is a schematic view of the structure of the mounting holes, passages and communication passages in the joint of FIG. 1;

FIG. 9 is a perspective view of a second embodiment of a fluid management device of the present application;

FIG. 10 is a perspective view of a third embodiment of a fluid management device of the present application;

FIG. 11 is a perspective view of a fourth embodiment of a fluid management device of the present application;

FIG. 12 is a schematic diagram of the connection of a thermal management system.

Detailed Description

The fluid management device of the application can be applied to a vehicle thermal management system, vehicles comprise new energy vehicles, and the fluid is refrigerant, including R134a or CO2 or other forms of refrigerant. The invention is further described with reference to the following figures and specific examples:

referring to fig. 1 to 11, the fluid management device 10 includes a connection portion 100, a throttling unit 400, a heat exchange portion 500 and a liquid storage portion 200, the heat exchange portion 500 includes a first heat exchanger 510, the first heat exchanger 510 has a first flow passage 511 and a second flow passage 512, the first flow passage 511 and the second flow passage 512 are not communicated with each other, a fluid in the first flow passage 511 and a fluid in the second flow passage 512 can exchange heat, in this embodiment, the first heat exchanger 510 includes a plurality of stacked plates, and the fluid in the first flow passage 511 and the fluid in the second flow passage 512 are refrigerants. The first heat exchanger 510 is fixedly connected or in a limited manner with the connection portion 100, where the connection includes a direct connection and also includes an indirect connection, the indirect connection means that an adapter is arranged between the first heat exchanger 510 and the connection portion 100, the adapter may be a block-shaped or plate-shaped structure, and the connection manner includes welding, bonding, or bolt connection or other connection manners. The fluid management device 10 has a reservoir 107, the connector 100 includes a mounting portion including a first mounting portion 140 and a second mounting portion 150, the first mounting portion 140 is fixedly or captively attached to and sealingly disposed at a junction with the reservoir 200, and at least a portion of the reservoir 107 is disposed within the reservoir 200. The second mounting portion 150 has a mounting hole for fitting the throttling unit 400, at least a part of the throttling unit 400 is located in the mounting hole of the second mounting portion 150, and the throttling unit 400 can throttle and reduce pressure of the fluid in the second mounting portion 150.

The connection part 100 has a first communication passage 111, a second communication passage 112, a third communication passage 113 and a fourth communication passage 114, the first communication passage 111 communicates with the reservoir chamber 107, the first communication passage 111 communicates with the second communication passage 112 through a first flow passage 511, the second communication passage 112 has a port formed at the second mounting part 150, the second communication passage 112 communicates with the mounting hole of the second mounting part 150, the first communication passage 111 is an outlet passage of the reservoir chamber 107, and the fluid in the reservoir chamber 107 enters the first flow passage 511 of the first heat exchanger through the first communication passage 111, then enters the second communication passage 112, and then flows out of the connection part 100 after being throttled by the throttle unit 400. The third communicating channel 113 communicates with the fourth communicating channel 114 through the second flow passage 512, the third communicating channel 113 is an inlet channel of the second flow passage 512 of the first heat exchanger, and the fourth communicating channel 114 is an outlet channel of the second flow passage 512.

The connection part 100 may be a block body, and the communication passage and the mounting hole may be machined; the connecting portion 100 may also be a casting, and the communication passage and the mounting hole are formed by casting or machining the mounting hole; the connecting portion 100 may also be a forged piece, and two or more separate bodies formed by forging and welding or bonding are fixed to form the communication passage.

The fluid management device 10 assembles the liquid storage portion 200, the throttling unit 400 and the heat exchanging portion 500 into a whole, by providing the connecting portion 100 with a communicating channel to communicate the liquid storage portion 200 and the throttling unit 400, the connecting portion 100 is provided with an inlet channel and an outlet channel of the first flow channel, the connecting portion 100 is further provided with an inlet channel and an outlet channel of the second flow channel 512, and since the communicating channel is formed inside the connecting portion 100, a connection point of the communicating channel is located inside the connecting portion 100, and external leakage of the connection of the communicating channel is reduced.

Referring to fig. 1 to 4, the liquid storage part 200 includes a cylinder, a portion of the cylinder is located in the mounting hole of the first mounting part 140, and the outer wall of the cylinder is welded to the inner wall of the first mounting part 140. In the axial direction of the sump 200 or in the axial direction of the cylinder, at least a part of the sump 200 is located on one side of the connecting portion 100, and the first heat exchanger 510 is located on the opposite side of the connecting portion 100; or, at least a portion of the connection portion 100 is located between the reservoir portion 200 and the first heat exchanger 510 in the axial direction of the cartridge body, such that the center of mass of the fluid management device 10 is located within the connection portion 100 or close to the connection portion 100, which contributes to the structural stability of the fluid management device 10. The connecting portion 100 includes a first wall portion 131 and a second wall portion 132, the first wall portion 131 faces the first heat exchanger 510, and the first wall portion 131 is directly or indirectly fixedly connected with a connecting wall portion 513 of the first heat exchanger. The first communication channel 111, the second communication channel 112, the third communication channel 113 and the fourth communication channel 114 all have ports facing the first heat exchanger 510 on the first wall portion 131, correspondingly, the first flow channel 511 has two ports on the connecting wall portion 513 of the first heat exchanger, the two ports of the first flow channel 511 are respectively matched with the ports on the first wall portion 131 of the first communication channel 111 and the second communication channel 112, and therefore the first flow channel 511 is communicated with the first communication channel 111 and the second communication channel 112; similarly, the second flow passage 512 has two ports in the connecting wall 513 of the first heat exchanger, and the two ports of the second flow passage 512 are respectively coupled to the ports of the third communication passage 113 and the fourth communication passage 114 in the first wall 131, so that the second flow passage communicates with the third communication passage 113 and the fourth communication passage 114.

The connection portion 100 further includes a fifth communication passage 115, and the throttling unit 400 enables the second communication passage 112 to communicate with the fifth communication passage 115, or the refrigerant of the second communication passage 112 is throttled by the throttling unit and then flows out of the connection portion 100 through the fifth communication passage 115. The fifth communication passage 115 is formed with an outlet of the fifth communication passage 115 at the connection portion 100, and in a specific embodiment, the fifth communication passage 115 has an outlet of the fifth communication passage 115 at the first wall portion 131.

Referring to fig. 3, 4 and 8, the heat exchange portion further includes a second heat exchanger 520, in this embodiment, the second heat exchanger 520 includes a plurality of stacked plates, the second heat exchanger 520 includes a refrigerant flow channel 521 and a coolant flow channel, and the refrigerant in the refrigerant flow channel 521 of the second heat exchanger and the coolant in the coolant flow channel can exchange heat. The connecting wall portion 522 of the second heat exchanger 520 is directly or indirectly fixedly connected to the first wall portion 131, for example, the first wall portion 131 and the connecting wall portion 522 of the second heat exchanger may be welded, sealed and fixed, the refrigerant flow path 521 of the second heat exchanger has two ports at the connecting portion 100 thereof, the two ports are respectively matched with the port of the fifth communication channel 115 at the first wall portion 131, the port of the third communication channel 113 at the first wall portion 131, the third communication channel 113 is communicated with the refrigerant flow path 521 of the second heat exchanger, and the fifth communication channel 115 is communicated with the refrigerant flow path 521 of the second heat exchanger. The refrigerant discharged from the receiver tank 107 is throttled by the throttling unit, evaporated in the second heat exchanger 520 to absorb heat, and then introduced into the second flow path of the first heat exchanger 510.

Referring to fig. 1, 3 and 8, the fluid management device 10 includes two throttling units, namely a first throttling unit 410 and a second throttling unit 420, and accordingly, the second mounting portion 150 includes a first mounting hole portion 151 and a second mounting hole portion 152, the first mounting hole portion 151 has a first mounting hole 1511, the second mounting hole portion 152 has a second mounting hole 1521, at least a portion of the first throttling unit 410 is located in the first mounting hole 1511, at least a portion of the second throttling unit 420 is located in the second mounting hole 1521, in this embodiment, the second communicating channel 112 has a port in the first mounting hole portion 151, and further the second communicating channel 112 communicates with the first mounting hole 1511. The connection portion 100 has a first channel 121 and a second channel 122, wherein the first channel 121 has ports in both the first mounting hole portion 151 and the second mounting hole portion 152, and the first channel 121 communicates with the first mounting hole 1511 and the second mounting hole 1521, or the second communication channel 112 communicates with the second mounting hole 1521 through the first mounting hole 1511 and the first channel 121, or refrigerant of the second communication channel 112 can enter the first mounting hole 1511 and the second mounting hole 1521. The first throttling unit 410 may communicate the second communication passage 112 with the fifth communication passage 115, and the second throttling unit 420 may communicate the second communication passage 112 with the second passage 122, the second passage 122 having an outlet of the second passage 122 at an outer wall of the connection portion 100. In this way, the refrigerant flowing out of the first flow passage 511 of the first heat exchanger 510 is divided into two paths, one path enters the second heat exchanger 520 through the first throttling unit 410 to evaporate and absorb heat, the other path enters the second channel 122 through the second throttling unit 420, and finally the second channel 122 flows out of the fluid management device 10. In other embodiments, the fluid management device 10 may also be provided with the first throttling unit 410, and the fifth communication channel 115 is formed with two ports at the connection portion 100, wherein one port is communicated with the refrigerant flow channel 521 of the second heat exchanger, and the other port is used for communicating with other components in the system, and will not be described in detail.

Referring to fig. 1, 3, and 6-8, the fluid management device 10 further includes a valve unit including a first valve unit 310 and a second valve unit 320, and correspondingly, the mounting portion includes a third mounting portion 160, the third mounting portion 160 includes a third mounting hole portion 161 and a fourth mounting hole portion 162, the third mounting hole portion 161 has a third mounting hole 1611, the fourth mounting hole portion 162 has a fourth mounting hole 1621, at least a portion of the first valve unit 310 is located in the third mounting hole 1611, and at least a portion of the second valve unit 320 is located in the fourth mounting hole 1621; the connecting portion 100 has a sixth communicating channel 116 communicating with the third mounting hole 1611, a third channel 123 communicating with the fourth mounting hole 1621, the first valve unit 310 being capable of communicating the sixth communicating channel 116 with the reservoir chamber 107, and the second valve unit 320 being capable of communicating the third channel 123 with the reservoir chamber 107. The first valve unit 310 and the second valve unit 320 may be on-off valves or one-way valves, and in this embodiment, the first valve unit 310 and the second valve unit 320 are one-way valves, that is, the first valve unit 310 can make the sixth communication passage 116 and the reservoir chamber 107 be in one-way communication, and the second valve unit 320 can make the third passage 123 and the reservoir chamber 107 be in one-way communication. In a specific embodiment, the connection portion 10 has a sixth channel 126 and an eighth communication channel 118, the eighth communication channel 118 has a port formed in the first mounting portion 140, the eighth communication channel 118 communicates with the reservoir 107, the sixth channel 126 has ports formed in the third mounting hole portion 161 and the fourth mounting hole portion 162, and the sixth communication channel 116 communicates with the fourth mounting hole 1621 through the third mounting hole 1611 and the sixth channel 126. The first valve unit 310 can communicate the sixth communication passage 116 with the eighth communication passage 118, and the second valve unit 320 can communicate the third passage 123 with the eighth communication passage 118.

The reservoir 200 is located closer to the restriction unit than the first and second valve units 310, 320, or the reservoir 200 is located between the valve unit 300 and the restriction unit 400, which allows the fluid management device 10 to be more compact and reasonably arranged. It can be understood that the first valve unit 310 and the second valve unit 320 are located upstream of the reservoir 200 in the flow direction of the refrigerant, and the first valve unit 310 and the second valve unit 320 can control two flow paths into the reservoir chamber 107.

Referring to fig. 1, 3 and 6-8, the fluid pipe device 10 includes a third heat exchanger 530 and a third valve unit 330, the third mounting portion 160 includes a fifth mounting hole portion 163, the fifth mounting hole portion 163 has a fifth mounting hole 1631, and at least a portion of the third valve unit 330 is located at the fifth mounting hole 1631. The connecting portion 100 has a fourth passage 124, a fifth passage 125, and a seventh communication passage 117, the fourth passage 124, the fifth passage 125, and the seventh communication passage 117 have ports at the fifth mounting hole portion 163, the third valve unit 330 can communicate at least one of the fifth passage 125 and the seventh communication passage 117 with the fourth passage 124, in the present embodiment, the fourth passage 124 is an inlet passage of the connecting portion 100, and the fifth passage 125 and the seventh communication passage 117 are outlet passages of the connecting portion 100. In the present embodiment, the third heat exchanger 530 includes a plurality of stacked plates, the third heat exchanger 530 has a refrigerant flow passage 531 and a coolant flow passage, and the connecting wall portion 532 of the third heat exchanger is fixedly connected to the first wall portion 131 directly or indirectly. The sixth communication passage 116 and the seventh communication passage 117 each have a port facing the connection portion 100 of the third heat exchanger 530 in the first wall portion 131, the refrigerant flow passage 531 of the third heat exchanger has two ports in the connection wall portion 532 of the third heat exchanger, the two ports are fitted to the ports of the sixth communication passage 116 and the seventh communication passage 117 in the first wall portion 131, the sixth communication passage 116 communicates with the refrigerant flow passage 531 of the third heat exchanger, and the seventh communication passage 117 communicates with the refrigerant flow passage 531 of the third heat exchanger. The refrigerant introduced into the fluid management device 10 through the fifth passage 125 may flow out of the fluid management device 10 through the fourth passage 124, or may flow into the refrigerant passage of the third heat exchanger 530 through the seventh communication passage 117 by controlling the third valve unit 330, and then may flow into the receiver 107 through the sixth communication passage 116 and the first valve unit 310.

Referring to fig. 1, 3 and 6-8, the valve unit further includes a fourth valve unit 340, the third mounting portion 160 includes a sixth mounting hole portion 164, the sixth mounting hole portion 164 has a sixth mounting hole 1641, at least a portion of the fourth valve unit 340 is located in the sixth mounting hole 1641, the connection portion 100 has a seventh passage 127, the seventh passage 127 has a port formed in the sixth mounting hole portion 164, the third communication passage 113 has a port formed in the sixth mounting hole portion 164, and the fourth valve unit 340 can communicate the seventh passage 127 with the third communication passage 113. The fourth valve unit 340 may be a switching valve or a check valve, and when the fourth valve unit 340 is a check valve, the fourth valve unit 340 may allow the seventh passage 127 to unidirectionally communicate with the third communication passage 113. When the fluid management device 10 includes the fourth valve unit 340, the refrigerant entering the second flow passage 512 of the first heat exchanger comes in the refrigerant flow passage 521 and the seventh passage 127 of the second heat exchanger, and the fourth valve unit 340 can prevent the refrigerant of the second heat exchanger 520 from entering the seventh passage 127.

In a specific embodiment, the connecting portion 100 includes a second wall 132, the second wall 132 is located on the opposite side of the first wall 131 along the axial direction of the reservoir, and the mounting hole of the first mounting portion 140, the mounting hole of the second mounting portion 150, and the mounting hole of the third mounting portion 160 have mounting openings in the second wall 132, so that the valve unit 300, the throttle unit 400, and the reservoir 200 of the fluid management device 10 are mounted on the same side of the connecting portion 100, thereby facilitating assembly of the fluid management device 10 and making the fluid management device 10 more compact. Of course, the mounting holes may be provided in other wall portions of the connecting portion 100, and will not be described in detail.

Referring to fig. 1, 2 and 8, the fluid management device 10 has a first inlet 101, a second inlet 103, a third inlet 105, a first outlet 102, a second outlet 104 and a third outlet 106, which may be disposed on a pipe or block connected to the connection portion 100, in this embodiment, the outlets and inlets are located on the connection portion 100. The first inlet 101 communicates with the fifth passage 125, the first outlet 102 communicates with the fourth communicating passage 114, the second inlet 103 communicates with the third passage 123, the second outlet 104 communicates with the fourth passage 124, the third outlet 106 communicates with the second passage 122, and the third inlet 105 communicates with the seventh passage 127.

Referring to fig. 10, in the second embodiment of the fluid management device 10, the fluid management device 10 may not include the second heat exchanger 520, and the port formed by the fifth communication channel 115 at the connection portion 100 is an outlet of the fluid management device 10, and the port formed by the third communication channel 113 at the connection portion 100 is an inlet of the fluid management device 10.

Referring to fig. 11, in the third embodiment of the fluid management device 10, the fluid management device 10 may not include the third heat exchanger 530, and the port formed by the sixth communication channel 116 at the connection portion 100 is an inlet of the fluid management device 10, and the port formed by the seventh communication channel 117 at the connection portion 100 is an outlet of the fluid management device 10. Of course, the fluid management device may not include the second heat exchanger 520 and the third heat exchanger 530, and will not be described in detail with reference to fig. 9.

Referring to fig. 1, 2, 8 and 12, the present application further provides a thermal management system applied to a vehicle, where the thermal management system includes a compressor 11, a fluid management device, a fourth heat exchanger 2 and a fifth heat exchanger 3, the fifth heat exchanger 3 is disposed in an air conditioning cabinet of the vehicle, an outlet of the compressor 1 is communicated with a first inlet 101, an inlet of the compressor 1 is communicated with a first outlet 102, a second outlet 104 is communicated with a second inlet 103 through the fourth heat exchanger 22, and a third outlet 106 is communicated with a third inlet 105 through the fifth heat exchanger 3. The fluid management device 10 integrates a heat exchange portion, a valve unit, a throttle unit, and a reservoir portion 200, which makes the connection of the thermal management system relatively simple.

In the cooling mode of the thermal management system, the third valve unit 330 connects the first inlet 101 with the second outlet 104, the refrigerant with high temperature and high pressure releases heat in the fourth heat exchanger 2, and then the refrigerant enters the fluid management device 10 through the second inlet 103, the second valve unit 320 connects the second inlet 103 with the receiver 107, the refrigerant in a relatively liquid state enters the first flow passage 511 of the first heat exchanger 510, and then the refrigerant enters the second heat exchanger 520 through the first throttling unit 410 to evaporate and absorb heat, and/or the refrigerant enters the fifth heat exchanger 3 through the second throttling unit 420 to evaporate and absorb heat, and the refrigerant in the second heat exchanger 520 enters the second flow passage of the first heat exchanger 510 through the third communication passage 113, and finally enters the inlet of the compressor 1 through the first outlet 102; the refrigerant of the fifth heat exchanger 3 enters the fluid management device 10 through the third inlet 105, and the fourth valve unit 340 makes the third inlet 105 communicate with the third communication channel 113, and then enters the second flow channel of the first heat exchanger 510, and finally enters the inlet of the compressor 1 through the first outlet 102.

In the heating mode of the thermal management system, the third valve unit 330 connects the first inlet 101 to the refrigerant flow path of the third heat exchanger 530, the refrigerant with high temperature and high pressure releases heat in the third heat exchanger 530, and then the refrigerant enters the receiver 107 through the first valve unit 310, the refrigerant in a relatively liquid state enters the first flow path of the first heat exchanger 510, and the subsequent flow path of the refrigerant corresponds to the cooling mode of the thermal management system and will not be described in detail.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (12)

1. A fluid management device comprises a connecting part, a throttling unit, a heat exchange part and a liquid storage part, wherein the heat exchange part comprises a first heat exchanger, the first heat exchanger is provided with a first flow passage and a second flow passage, the first flow passage and the second flow passage are not communicated relatively, and the first heat exchanger is fixedly connected or in limited connection with the connecting part; the fluid management device is provided with a liquid storage cavity, the connecting part comprises a mounting part, the mounting part comprises a first mounting part and a second mounting part, the first mounting part is fixedly connected or in limited connection with the liquid storage part, at least part of the liquid storage cavity is positioned in the liquid storage part, and at least part of the throttling unit is positioned in a mounting hole of the second mounting part;

the connecting portion has a first communicating channel formed with an opening in a wall of the first mounting portion, a second communicating channel communicating with the reservoir, a third communicating channel formed with an opening in a wall of the second mounting portion, the first communicating channel communicating with the second communicating channel through the first flow passage, and a fourth communicating channel communicating with the fourth communicating channel through the second flow passage.

2. The fluid management device of claim 1, wherein at least a portion of the sump portion is located on one side of a connection portion and the first heat exchanger is located on an opposite side of the connection portion in an axial direction of the sump portion; the connecting part comprises a first wall part, and the first wall part is fixedly connected or in limited connection with the first heat exchanger; the first communication passage, the second communication passage, the third communication passage, and the fourth communication passage are each formed with a port facing the first heat exchanger in the first wall portion.

3. The fluid management device according to claim 1 or 2, wherein the heat exchanging portion comprises a second heat exchanger fixedly or limitedly connected to the first wall portion of the connecting portion, and the connecting portion comprises a fifth communication passage which can be brought into communication by adjusting the throttling unit; the fifth communication passage is formed with a port facing the second heat exchanger in the first wall portion, and the fifth communication passage communicates with the third communication passage through the second heat exchanger.

4. The fluid management device according to claim 3, wherein the throttle unit includes a first throttle unit and a second throttle unit, the second mounting portion includes a first mounting hole portion and a second mounting hole portion, the first mounting hole portion has a first mounting hole, the second mounting hole portion has a second mounting hole, at least a portion of the first throttle unit is located in the first mounting hole, at least a portion of the second throttle unit is located in the second mounting hole, and the second communication passage has an opening formed in the first mounting hole portion;

the connecting part is provided with a first channel and a second channel, the first channel is provided with openings at the first mounting hole part and the second mounting hole part, and the second communication channel is communicated with the second mounting hole through the first mounting hole and the first channel; the first throttling unit may communicate the second communication passage with the fifth communication passage, and the second throttling unit may communicate the second communication passage with the second passage.

5. The fluid management device according to any of claims 1-4, comprising a valve unit comprising a first valve unit and a second valve unit, the mounting portion comprising a third mounting hole portion and a fourth mounting hole portion, the third mounting hole portion having a third mounting hole, the fourth mounting hole portion having a fourth mounting hole, at least a portion of the first valve unit being located in the third mounting hole, at least a portion of the second valve unit being located in the fourth mounting hole; the reservoir is closer to the throttle unit than the first and second valve units;

the connecting part is provided with a sixth communicating channel and a third channel, the sixth communicating channel is communicated with the third mounting hole, the third channel is communicated with the fourth mounting hole, the first valve unit can enable the sixth communicating channel to be communicated with the liquid storage cavity, and the second valve unit can enable the third channel to be communicated with the liquid storage cavity.

6. The fluid management device of claim 5 comprising a third valve unit and a third heat exchanger, the third mounting portion comprising a fifth mounting bore portion having a fifth mounting bore, at least a portion of the third valve unit being located at the fifth mounting bore;

the connecting portion has a fourth passage, a fifth passage, and a seventh communication passage, the fourth passage, the fifth passage, and the seventh communication passage having ports formed at the fifth mounting hole portion, the third valve unit being capable of communicating at least one of the fifth passage and the seventh communication passage with the fourth passage;

the third heat exchanger is directly or indirectly fixedly connected with the first wall portion, the sixth communication channel and the seventh communication channel are respectively provided with a port facing the third heat exchanger on the first wall portion, and the sixth communication channel is communicated with the seventh communication channel through the third heat exchanger.

7. The fluid management device according to claim 6, wherein the connecting portion has a sixth channel and an eighth communication channel, the eighth communication channel communicating with the reservoir, the sixth channel having openings formed at the third mounting hole portion and the fourth mounting hole portion, the sixth communication channel communicating with the fourth mounting hole through the third mounting hole and the sixth channel;

the first valve unit is capable of communicating the sixth communication passage with the eighth communication passage, and the second valve unit is capable of communicating the third passage with the eighth communication passage.

8. The fluid management device according to claim 7, wherein the first mounting portion has a mounting hole, a part of the liquid reservoir is located in the mounting hole formed in the first mounting portion, the eighth communication channel has a port formed in a wall of the first mounting portion, and the first communication channel has a port formed in a wall of the first mounting portion.

9. The fluid management device according to any of claims 5-8 wherein the valve unit further comprises a fourth valve unit, the third mounting portion comprises a sixth mounting hole portion having a sixth mounting hole, at least a portion of the fourth valve unit being located in the sixth mounting hole; the connecting portion has a seventh passage formed with a port on a wall of the sixth mounting hole portion, the third communication passage formed with a port on the sixth mounting hole portion, and the fourth valve unit is capable of communicating the seventh passage with the third communication passage.

10. The fluid management device according to claim 9, wherein the connecting portion includes a second wall portion, the first wall portion is located on one side of the connecting portion and the second wall portion is located on an opposite side of the connecting portion in an axial direction of the reservoir portion, and the mounting hole of the first mounting portion, the mounting hole of the second mounting portion, and the mounting hole of the third mounting portion are formed with mounting openings in the second wall portion.

11. The fluid management device of claim 10 wherein the fluid management device has a first inlet in communication with the fifth channel, a second inlet in communication with the fourth communication channel, a third inlet in communication with the fourth channel, a first outlet in communication with the second channel, a second outlet in communication with the second channel, and a third outlet in communication with the seventh channel.

12. A thermal management system comprising a compressor, a fluid management device according to any of claims 1 to 11, a fourth heat exchanger and a fifth heat exchanger, the fluid management device having a first inlet, a second inlet, a third inlet, a first outlet, a second outlet and a third outlet, the outlet of the compressor being in communication with the first inlet, the inlet of the compressor being in communication with the first outlet, the second outlet being in communication with the second inlet via the fourth heat exchanger and the third outlet being in communication with the third inlet via the fifth heat exchanger.

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