CN114388925A

CN114388925A - Thermal management system

Info

Publication number: CN114388925A
Application number: CN202011140135.XA
Authority: CN
Inventors: 不公告发明人
Original assignee: Shaoxing Sanhua New Energy Auto Parts Co ltd
Current assignee: Shaoxing Sanhua New Energy Auto Parts Co ltd
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-04-22

Abstract

The heat management system comprises a separator, a first expansion valve and a double-flow-channel heat exchanger, wherein a refrigerant of a first flow channel enters the separator after being throttled by the first expansion valve, is subjected to gas-liquid separation in the separator, enters a liquid refrigerant into the first heat exchanger for evaporation and heat absorption, then enters a second flow channel, enters a second flow channel relative to a low-temperature low-pressure refrigerant, is subjected to heat exchange with the refrigerant in the first flow channel, and then enters a compressor, the separator is arranged at the downstream of the first expansion valve, the refrigerant entering the first heat exchanger is in a liquid state, the refrigerant is favorably and uniformly distributed in the first heat exchanger, and the temperature uniformity of the first heat exchanger can be improved.

Description

Thermal management system

Technical Field

The invention relates to the technical field of thermal management, in particular to a thermal management system.

Background

The thermal management system for the vehicle comprises a heat exchanger capable of adjusting the temperature of the battery, and the temperature uniformity has a large influence on the performance of the battery, so that new requirements are put forward on the thermal management system to ensure that the battery works in a relatively uniform temperature environment.

Disclosure of Invention

It is an object of the present application to provide a thermal management system to facilitate improved temperature uniformity of a heat exchanger.

An embodiment of the technical scheme of this application provides a heat management system, including compressor, first heat exchanger, second heat exchanger, separator, first expansion valve and two-flow heat exchanger, two-flow heat exchanger has first runner and second runner, refrigerant in the first runner with refrigerant can the heat exchange in the second runner, the heat management system during operation, the compressor can pass through the second heat exchanger with the first port intercommunication of first runner, the second port of first runner passes through first expansion valve with the entry intercommunication of separator, the liquid outlet of separator with the entry intercommunication of first heat exchanger, the export of first heat exchanger passes through the second runner communicates with the entry of compressor.

Another embodiment of the present disclosure provides a thermal management system, including a compressor, a first heat exchanger, a fluid management device, and a second heat exchanger, where the fluid management device includes a first valve portion, a first heat exchanging portion, a first cylinder, and a second cylinder, the fluid management device has a first valve port, a first cavity, and a second cavity, the first valve portion is capable of adjusting an opening degree of the first valve port, at least a portion of the first cavity is located between the first cylinder and the second cylinder, at least a portion of the first heat exchanging portion is located in the first cavity, and the first heat exchanging portion has a first heat exchanging channel;

when the heat management system works, the outlet of the compressor can be communicated with the first heat exchange channel through the second heat exchanger, the first heat exchange channel can be communicated with the second cavity through the first valve port, the liquid outlet of the second cavity is communicated with the inlet of the first heat exchanger, and the outlet of the first heat exchanger is communicated with the inlet of the compressor through the first cavity.

By providing the heat management system and arranging the device with the intermediate heat exchange function, the heat management system throttles the refrigerant behind the high-pressure flow channel of the device with the intermediate heat exchange function and performs gas-liquid separation, so that the refrigerant entering the first heat exchanger is in a liquid state, the refrigerant is favorably and uniformly distributed in the first heat exchanger, and the temperature uniformity of the first heat exchanger can be improved.

Drawings

FIG. 1 is a schematic connection diagram of a thermal management system according to a first embodiment of the present invention;

FIG. 2 is a schematic connection diagram of a thermal management system according to a second embodiment of the present invention;

FIG. 3 is a schematic connection diagram of a thermal management system according to a third embodiment of the present invention;

FIG. 4 is a schematic view of a connection of the fluid management device of FIG. 1 to a first heat exchanger;

FIG. 5 is a schematic view of a connection of the fluid management device of FIG. 2 to a first heat exchanger;

FIG. 6 is a schematic perspective view of a first embodiment of a fluid management device;

FIG. 7 is a schematic perspective view of the fluid management device of FIG. 6 from another perspective;

FIG. 8 is a schematic diagram of a first exploded configuration of the fluid management device of FIG. 6;

FIG. 9 is a schematic diagram of a second exploded configuration of the fluid management device of FIG. 6;

FIG. 10 is a schematic diagram of a second exploded alternate view of the fluid management device of FIG. 6;

FIG. 11 is a schematic top view of the fluid management device of FIG. 6;

FIG. 12 is a schematic cross-sectional view taken along A-A of FIG. 11;

FIG. 13 is a schematic cross-sectional view taken along B-B of FIG. 11;

fig. 14 is a schematic diagram of a second exploded configuration of the fluid management device of fig. 6;

FIG. 15 is a schematic perspective view of a second embodiment of a fluid management device;

fig. 16 is a schematic diagram of a first exploded configuration of the fluid management device of fig. 15;

fig. 17 is a schematic diagram of an alternative perspective of the first explosion of the fluid management device of fig. 15;

FIG. 18 is a schematic top view of the fluid management device of FIG. 15;

FIG. 19 is a schematic cross-sectional view of the fluid management device of FIG. 18 taken along C-C;

fig. 20 is a schematic connection diagram of a thermal management system according to a fourth embodiment of the present invention.

Detailed Description

The invention will be further described with reference to the following figures and specific examples:

the fluid management device of the present application can be applied to a vehicle thermal management system, where the vehicle can be a new energy vehicle and the fluid in the fluid management device 1000 can be a refrigerant, such as R134a or CO 2. Referring to fig. 6 to 14, the fluid management device 1000 includes a first valve part 1500, a first heat exchanging part 1600, a first cylinder 1200, a second cylinder 1700, a first connector 1100, and a second connector 1300, wherein the first connector 1100 has a first mounting hole 1105, at least a portion of the first valve part 1500 is located in the first mounting hole 1105, and the first valve part 1500 is connected to the first connector 1100 in a fixed or limited manner. The first cylinder 1200 and the second cylinder 1700 have openings at two ends, at least a part of the second cylinder 1700 is located in the first cylinder 1200, the first connection body 1100 is fixedly connected or in a limited manner with the first end of the first cylinder 1200 and the first end of the second cylinder 1700 and is sealed relatively at the connection, and the second connection body 1300 is fixedly connected or in a limited manner with the second end of the first cylinder 1200 and the second end of the second cylinder 1700 and is sealed relatively at the connection. For convenience of description, the axial direction of the first cylinder 1200 is defined as the up-down direction, the second connector 1300 is located below, and the first connector 1100 is located above. The first cylinder and the second cylinder can be round cylinders, square cylinders or cylinders with other shapes.

Referring to fig. 12 and 13, the fluid management device 1000 includes a first channel 1140, a second channel 1150, a first valve port 1501, a first heat exchanging channel 1601, a first cavity 1010 and a second cavity 1020, where the first valve port 1501 is located in the first connecting body, the first valve port 1501 may be formed in the first connecting body 1100 or in the first valve part 1500, and the first valve part 1500 includes a first driving part and a first valve core, and the first driving part can drive the first valve core to move, so that the first valve core can open, close and adjust an opening degree of the first valve port 1501. When the first valve spool opens the first port 1501, the first passage 1140 is able to communicate with the second passage 1150 through the first port 1501. In the radial direction of the first cylinder 1200, at least a part of the first cavity 1010 is located between the inner wall of the first cylinder 1200 and the outer wall of the second cylinder 1700; the second chamber 1020 is at least a part of the chamber of the second cylinder 1700, or the wall forming the second chamber 1020 includes the inner wall of the second cylinder 1700, at least a part of the first channel 1140 and the second channel 1150 are formed in the first connection body 1100, at least a part of the first heat exchanging part 1600 is located in the first chamber 1010, the first heat exchanging part 1600 has the first heat exchanging channel 1601, in this embodiment, referring to fig. 8, the first heat exchanging part 1600 includes a first header 1620, a second header 1630 and a plurality of flat tubes 1610 fixedly connected to the first header 1620 and the second header 1630, respectively, a cavity of the first header 1620 can be communicated with a cavity of the second header 1630 through a flat tube channel, a cavity of the first header 1620 can be an inlet cavity of the first heat exchanging part 1600, a cavity of the second header 1630 can be an outlet cavity of the first heat exchanging part 1600, or the chambers within the first manifold 1620, can flow through the flat tube channels into the chambers of the second manifold 1630. The second connection portion of the first heat exchanging portion 1600 is fixedly connected or connected in a limited manner with the second connection body 1300 and is sealed relatively at the connection position, the first connection portion of the first heat exchanging portion 1600 is fixedly connected or connected in a limited manner with the first connection body 1100 and is sealed relatively at the connection position, the first channel 1140 is communicated with the cavity of the second header 1630, and the second channel 1150 is communicated with the second cavity 1020, wherein the first connection portion of the first heat exchanging portion 1600 is located in the second header 1630, and the second connection portion of the first heat exchanging portion 1600 is located in the first header 1620. When the fluid management device 1000 operates, the first chamber 1010 further contains a refrigerant, and the refrigerant in the first chamber 1010 and the refrigerant in the first heat exchange portion 1600 can exchange heat. In order to enhance the heat exchange effect, the outer wall of the flat tube 1610 may further be fixedly connected with a plurality of fins to increase the heat exchange area between the refrigerant in the first heat exchange portion 1600 and the refrigerant in the first cavity 1010. The first chamber accommodates a part of the first heat exchanging portion, and the first chamber also accommodates a refrigerant, which can exchange heat with the refrigerant in the first heat exchanging portion. In other embodiments, the first heat exchanging part 1600 may be other heat exchangers, for example, the first heat exchanging part 1600 may be a tube.

The refrigerant in the second chamber 1020 can be separated into gas and liquid, the second chamber 1020 also contains an umbrella cap 1710 and at least a part of a gas return pipe 1720, and the umbrella cap 1710 and the gas return pipe 1720 can improve the gas-liquid separation efficiency and are not described in detail. During the gas-liquid separation process, the gas rises and the liquid sinks and flows out through the bottom of the second cylinder 1700. The fluid management device 1000 has a fluid channel 1040, the fluid channel 1040 being at least partially formed in the second connector, the fluid channel 1040 being in communication with the second chamber 1020.

In other embodiments, the fluid management device 1000 may also have both the liquid channel 1040 and the gas channel 1030, and the gaseous refrigerant in the second chamber 1020 may enter the first chamber 1010 through the gas channel 1030, and after entering the first chamber 1010, the gaseous refrigerant may exchange heat with the refrigerant in the first heat exchange channel 1601 and then exit the fluid management device 1000. The first coupling body 1100 may also be provided with a gas passage 1030 outlet, with gaseous refrigerant directly exiting the fluid management device 1000.

The fluid management device 1000 has a first inlet 1002, a first outlet 1001, a second inlet 1004, and a second outlet 1003, the first inlet 1002 communicates with the first heat exchange channels 1601, in this embodiment, the second connection body 1300 has a second communication channel 1321 communicating with the chamber of the first header 1620, the second communication channel 1321 forms the first inlet 1002 at the second connection body 1300, the first inlet 1002 communicates with the chamber of the first header 1620, in other embodiments, the first inlet 1002 may be formed in the first cylinder 1200 or the first connection body 1100 or the first header 1620, and will not be described in detail. The first outlet 1001 communicates with the second chamber 1020 through a liquid passage 1040, the second inlet 1004 communicates with the first chamber 1010, the second outlet 1003 communicates with the first chamber 1010, and the second inlet 1004 can communicate with the second outlet 1003 through the first chamber 1010. in this embodiment, the first outlet 1001 and the second outlet 1003 are formed in the second connecting body 1300, and the second inlet 1004 is formed in the first connecting body 1100, and it can be understood that the second outlet 1003 is located below the second inlet 1004. The first connecting body may also include a boss or a connecting pipe, the first inlet 1002, the first outlet 1001, and the second outlet 1003 may also be located on the corresponding boss or connecting pipe, and similarly, the second connecting body may also include a boss or a connecting pipe, and the second inlet 1004 may also be located on the corresponding boss or connecting pipe.

The operation of the fluid management device 1000 in a thermal management system is described below. Referring to fig. 20 and fig. 6 to 14, the vehicle thermal management system includes a compressor 100, a second heat exchanger 200, a fluid management device 1000, and a first heat exchanger 600, in this embodiment, the second heat exchanger 200 is a condenser, and the first heat exchanger 600 is a direct cooling plate, which can be used to reduce the temperature of the battery. The connection mode of the thermal management system is as follows: the outlet of the compressor 100 communicates with the first inlet 1002 of the fluid management device 1000 through the second heat exchanger 200, the first outlet 1001 communicates with the inlet of the first heat exchanger 600, the outlet of the first heat exchanger 600 communicates with the second inlet 1004, and the second outlet 1003 communicates with the inlet of the compressor 100. When the heat management system works, high-pressure refrigerant discharged from the second heat exchanger 200 enters the first heat exchange portion 1600 through the first inlet 1002, then enters the first channel 1140 through the cavity of the second header 1630, enters the second channel 1150 and the second cavity 1020 after being throttled and depressurized at the first valve port 1501, gas-liquid separation is performed in the second cavity 1020 for the refrigerant in a gas-liquid mixed state, liquid refrigerant enters the first heat exchanger 600 through the first outlet 1001 to be evaporated and absorb heat, the refrigerant absorbs heat of the battery at the first heat exchanger 600 to reduce the temperature of the battery, the refrigerant discharged from the first heat exchanger 600 enters the first cavity 1010 through the second inlet 1004, the refrigerant with relatively high pressure and relatively high temperature in the first heat exchange portion 1600 exchanges heat with the refrigerant with relatively low pressure and relatively low temperature in the first cavity 1010, the refrigerant in the first cavity 1010 is discharged from the fluid management device 1000 through the second outlet 1003, and finally enters the inlet of the compressor 100, and starting another cycle.

In this embodiment, the first heat exchange flow channel may be regarded as a high-pressure flow channel of the intermediate heat exchanger, at least a part of the first cavity 1010 is a low-pressure flow channel of the intermediate heat exchanger, and the heat management system is provided with the intermediate heat exchanger, so that the temperature distribution of the refrigerant in the first heat exchanger 600 is more uniform, the temperature of the battery is more uniform, and the performance of the battery is improved. If the temperature of the battery needs to be further accurately adjusted, the heat exchange amount between the refrigerant in the first heat exchange flow channel and the refrigerant in the first cavity 1010 can be adjusted by controlling the opening degree of the first valve port 1501, so as to adjust the heat exchange amount between the battery and the first heat exchanger 600. The second chamber 1020 has a gas-liquid separation function, the throttled refrigerant enters the first heat exchanger 600 after gas-liquid separation in the second chamber 1020, and the liquid refrigerant is uniformly distributed in the first heat exchanger 600, so that heat exchange between the first heat exchanger 600 and the battery is uniform, and the performance of the battery is improved. The fluid management device 1000 is integrated with a first valve part 1500 capable of adjusting the opening degree of the first valve port 1501, a first heat exchange part 1600 with an intermediate heat exchanger function, a first cavity 1010 and a second cavity 1020 with a gas-liquid separation function, so that pipeline connection in a thermal management system is reduced, the fluid management device 1000 is compact in structure, and flow resistance is reduced.

Referring to fig. 9 and 10, the first connecting body 1100 includes a first valve body 1120, a first cover 1110 and a second cover 1130, the first valve body 1120, the first cover 1110 and the second cover 1130 are separately disposed, wherein an upper wall of the first cover 1110 is welded, sealed and fixed with a lower wall of the first valve body 1120, and a first channel 1140 is formed in the first cover 1110 and the first valve body 1120, respectively. The first cover 1110 is fixedly connected or connected in a limited manner to the first end of the first cylinder 1200, and the connection is sealed relatively, more specifically, the lower end of the first cover 1110 is located in the cavity formed by the first cylinder 1200, and the lower end of the first cover 1110 is welded, sealed and fixed to the first end of the first cylinder 1200. The first cover 1110 includes a first wall portion 1101, the first wall portion 1101 includes a first wall portion 1101' facing the first chamber 1010, a first connection portion of the second header 1630 is fixedly or limitedly connected to the first wall portion 1101 and is sealed relative thereto at the connection portion, and the first heat exchange passage 1601 communicates with the first passage 1140. The fluid management device 1000 has a first communication channel 1170, the first communication channel 1170 is formed in the first cap 1110, the first communication channel 1170 forms a second inlet 1004 in the first cap 1110, the first communication channel 1170 has an opening in the first wall 1101', and the second inlet 1004 communicates with the first cavity 1010.

The second cover 1130 includes a main body part and a boss, a part of the main body part is located in the second cylinder 1700, the main body part is welded and sealed with the first end of the second cylinder 1700, the main body part includes a second wall 1102, and the second wall 1102 includes a second wall facing the second chamber 1020; the boss protrudes towards the first cover body 1110 relative to the main body portion, a gap is formed between the main body portion and the first cover body 1110 along the axial direction of the first cylinder 1200, the gap between the main body portion and the first cover body 1110 is a part of the first cavity 1010, the boss of the second cover body 1130 is fixedly connected or in limited connection with the first cover body 1110, the second channel 1150 is formed on the main body portion of the second cover body 1130, the boss of the second cover body 1130, the first cover body 1110 and the first valve body 1120 respectively, the second channel 1150 has an opening on the second wall surface, and the second channel 1150 is communicated with the second cavity 1020. Of course, the bosses may be formed as part of the first cover 1110, or may be formed separately from the first cover 1110 and the second cover 1130, and may be welded and fixed to the first cover 1110 and the second cover 1130.

When the fluid management apparatus 1000 has the gas channel 1030, referring to fig. 12, at least a part of the gas channel 1030 is formed in the second cover 1130, the gas channel 1030 has a port facing the first cover 1110 at an upper wall of the main body, the port is an outlet of the gas channel 1030, since a gap between the main body and the first cover 1110 is a part of the first chamber 1010, the gas channel 1030 communicates with the first chamber 1010, the gas channel 1030 has an inlet of the gas channel 1030 near the main body, and the gas of the second chamber 1020 enters the gas channel 1030 through the inlet of the gas channel 1030.

In other embodiments, the first cover 1110 and the first valve body 1120 may be of an integral structure, and will not be described in detail. Referring to fig. 14, the first cover 1110 and the second cover 1130 are defined as covers, the first valve body 1120 is fixedly connected or limited to the covers, at least a portion of the gas channel 1030 is formed on the covers, the covers include a first sidewall 1160, the first sidewall 1160 faces the first cavity 1010, the gas channel 1030 has an outlet of the gas channel 1030 on the first sidewall 1160, and the gas channel 1030 is communicated with the first cavity 1010.

Referring to fig. 6, 7 and 13, the fluid management device 1000 further includes a second valve portion 1400, the second valve portion 1400 includes a second valve core, the driving portion of the second valve portion 1400 can drive the second valve core to operate, the second connection body 1300 has a second mounting hole, a third channel 1311 and a fourth channel 1312, at least a portion of the second valve portion 1400 is located in the second mounting hole, the fluid management device 1000 has a second port 1401, the second port 1401 is located in the second connection body, the second port 1401 can be formed in the second valve portion 1400 or the second connection body 1300, when the second valve core opens the second port 1401, the third channel 1311 can communicate with the fourth channel 1312 through the second port 1401, the third channel 1311 has an opening on a wall surface facing the first cavity 1010, the third channel 1311 communicates with the first cavity 1010, the fourth channel 1311 forms a second outlet 1003 on the second connection body 1300, the second valve portion 1400 can open, The opening of the second valve port 1401 is closed and adjusted. The fluid management device 1000 adjusts the opening degree of the second valve port 1401 through the second valve core, and adjusts the pressure of the refrigerant flowing out of the first chamber 1010, and thus adjusts the pressure of the outlet of the first heat exchanger 600, so as to facilitate the adjustment of the heat exchange amount of the first heat exchanger 600.

The second connecting body 1300 includes a second valve body 1310 and a first lower cover 1320, the second valve body 1310 and the first lower cover 1320 are separately disposed, the second valve body 1310 and the first lower cover 1320 are welded or screwed or otherwise fixed or limited, the first lower cover 1320 is fixedly connected to the second end of the first cylinder 1200 and is sealed with respect to the second end, and the first inlet 1002 and the first outlet 1001 are formed in the first lower cover 1320. A third passage 1311 is formed in the second valve body 1310 and the first lower cover 1320, a fourth passage 1312 is formed in the second valve body 1310, and the fourth passage 1312 forms the second outlet 1003 in the second valve body 1310.

Please refer to the embodiments illustrated in fig. 15-19. The difference from the above embodiment is that the first outlet 1001 and the second inlet 1004 are formed in the second connecting body 1300, and the second outlet 1003 is formed in the first connecting body 1100. The first outlet 1001 and the second inlet 1004 are formed in the second connection body 1300, the first outlet 1001 is used for being communicated with the inlet of the first heat exchanger 600, the second inlet 1004 is used for being communicated with the outlet of the first heat exchanger 600, the first outlet 1001 and the second inlet 1004 are used for being connected with the first heat exchanger 600, the first outlet 1001 and the second inlet 1004 are close to each other, connecting pipelines of the fluid management device 1000 and the first heat exchanger 600 can be reduced, the mounting parts of the two connecting pipelines can be changed into one, the mounting times are reduced, and materials are also reduced. Still further, the first outlet 1001 and the second inlet 1004 are formed on the same wall of the second connection body 1300, and in the case that the inlet and the outlet of the first heat exchanger 600 are on the same wall, the fluid management device 1000 and the first heat exchanger 600 may be directly connected into a whole, so that the number of connection pipelines may be reduced, and the integration level may be improved.

In this embodiment, the first inlet 1002 is formed in the second connection body 1300. The first inlet 1002 may also be formed in other locations of the fluid management device 1000 and will not be described in detail.

The first connection body 1100 has a second mounting hole, a third channel 1311 and a fourth channel 1312, at least a part of the second valve portion 1400 is located in the second mounting hole, the second valve portion 1400 is fixedly or limitedly connected to the first connection body 1100, the second port is formed in the second valve portion 1400 or the first connection body 1100, the second valve portion 1400 is capable of adjusting the opening degree of the second port, the third channel 1311 has a port on a first wall surface, the third channel 1311 is communicated with the first cavity 1010, and the fourth channel 1312 has a second outlet 1003 on the first connection body 1100. When the second spool opens the second port, the first chamber 1010 can communicate with the second outlet 1003 through the second port. In this embodiment, the gas passage 1030 is formed in the second cover 1130, the first cover 1110 and the second valve 1310, and when the second valve 1400 opens the second port 1401, the gas passage 1030 communicates with the second outlet 1003 via the second port 1401. At this time, the gas after gas-liquid separation is discharged from the fluid management device through the second valve port and the second outlet.

In one embodiment, referring to fig. 16 and 17, the first connection body 1100 includes a second valve body 1310, the first valve body 1120 and the second valve body 1310 are separately disposed, the second outlet 1003 and the second mounting hole are formed in the second valve body 1310, the third channel 1311 is formed in the second valve body 1310 and the first cover body 1110, and the second valve body 1310 is fixedly connected or connected with the first cover body 1110.

Of course, the first valve body 1120 and the second valve body 1310 may also be an integral structure, the first valve body 1120 and the second valve body 1310 are collectively referred to as a valve body, the second outlet 1003 and the second mounting hole are formed in the valve body, the third channel 1311 is formed in the valve body and the first cover body 1110, and the valve body is fixedly connected or in a limited connection with the first cover body 1110. A third passage 1311 is formed in the valve body and the first cover 1110, a fourth passage 1312 is formed in the valve body, and the fourth passage communicates with the second outlet. The connection relationship between the valve body, the first cover 1110 and the second cover 1130, and the first cylinder 1200 and the second cylinder 1700 is the same as in the above embodiment, and will not be described in detail.

In addition, the first cover 1110 and the second cover 1130 may also be an integral structure, the first cover 1110 and the second cover 1130 define a cover, the valve body is fixedly connected or connected in a limited manner with the cover, at least a portion of the gas channel 1030 is formed on the cover, the cover includes a first sidewall facing the first cavity 1010, the gas channel 1030 has a port on the first sidewall, and the gas channel 1030 is communicated with the first cavity 1010. Of course, the gas passage 1030 may be formed with a third outlet at the cover.

In this embodiment, the first heat exchanger 600 is a direct cooling plate, the direct cooling plate includes a connecting portion, the direct cooling plate has a refrigerant inlet and a refrigerant outlet, the refrigerant inlet and the refrigerant outlet are formed in the connecting portion, the connecting portion is fixedly connected or in limited connection with the second connecting body 1300, the first outlet 1001 is communicated with the refrigerant inlet, and the second inlet 1004 is communicated with the refrigerant outlet.

One embodiment of the technical scheme of the invention also provides a thermal management system, which can be applied to vehicles, and the vehicles can be new energy vehicles. Referring to fig. 1 to 5, the thermal management system includes a compressor 100, a first heat exchanger 600, a second heat exchanger 200, and a fluid management device 1000, wherein the fluid management device 1000 includes a separator 1200 ', a first expansion valve 1500 ', and a two-flow heat exchanger 1600 ', and the separator 1200 ' has a gas-liquid separation function and a liquid outlet to enable liquid refrigerant in the separator 1200 ' to flow out. The dual-flow heat exchanger 1600 'may be a plate heat exchanger or a regenerator tube or other type of heat exchanger, the dual-flow heat exchanger 1600' having a first flow channel and a second flow channel, the refrigerant in the first flow channel and the refrigerant in the second flow channel being capable of heat exchange. An outlet of the compressor 100 is communicated with an inlet of the second heat exchanger 200, an outlet of the second heat exchanger 200 is communicated with a first port of a first flow channel, the first port of the first flow channel is a first inlet 1002 of the fluid management device 1000 or is communicated with the first inlet 1002 of the fluid management device 1000, a second port of the first flow channel is communicated with an inlet of the separator 1200 'through a first expansion valve 1500', a liquid outlet of the separator 1200 'is communicated with an inlet of the first heat exchanger 600, an outlet of the first heat exchanger 600 is communicated with an inlet of a second flow channel, an outlet of the second flow channel is communicated with an inlet of the compressor 100 or is communicated with an inlet of the compressor 100 through the gas-liquid separator 400, wherein a liquid outlet of the separator 1200' is a first outlet 1001 of the fluid management device 1000 or is communicated with the first outlet 1001 of the fluid management device 1000, an inlet of the second flow channel is a second inlet 1004 of the fluid management device 1000 or is communicated with the second inlet 1004 of the fluid management device 1000, the outlet of the second flow channel is the second outlet 1003 of the fluid management device 1000 or is in communication with the second outlet 1003 of the fluid management device 1000. High-pressure refrigerant enters a first flow channel of the double-flow-channel heat exchanger 1600 'from the second heat exchanger 200, it can be known that the refrigerant in the first flow channel has relatively high pressure and relatively high temperature, the refrigerant is throttled by the first expansion valve 1500' and then enters the separator 1200 ', the refrigerant is subjected to gas-liquid separation in the separator 1200', the liquid refrigerant enters the first heat exchanger 600 to be evaporated and absorb heat, and then enters the second flow channel, the relatively low-temperature and low-pressure refrigerant enters the second flow channel to be subjected to heat exchange with the refrigerant in the first flow channel and then enters the compressor 100, the heat management system is provided with the separator 1200 'at the downstream of the first expansion valve 1500', the refrigerant entering the first heat exchanger 600 is in a liquid state, the refrigerant is favorably and uniformly distributed in the first heat exchanger 600, the temperature uniformity of a heat exchange surface of the first heat exchanger 600 can be improved, particularly when the first heat exchanger 600 is a direct cooling plate for cooling a battery, the requirement of the battery on the temperature uniformity is high, so that the temperature uniformity of the battery is guaranteed, and the service life of the battery can be prolonged. Because there is a temperature difference between the refrigerant in the first flow channel of the dual-flow heat exchanger 1600 'and the refrigerant in the second flow channel of the dual-flow heat exchanger 1600', the refrigerant exchanges heat in the dual-flow heat exchanger 1600 ', so that the temperature of the refrigerant entering the compressor 100 is lower than that of the refrigerant at the outlet of the first heat exchanger 600, and compared with the case of not providing the dual-flow heat exchanger 1600', the temperature difference between the batteries at the inlet and outlet sides of the first heat exchanger 600 is reduced, so that the temperature of the batteries is not too high, the temperature uniformity of the batteries is relatively improved, and the temperature of the batteries is in a reasonable range. This also relatively reduces the temperature difference between the inlet side of the first heat exchanger 600 and the outlet side of the first heat exchanger 600, improves the temperature uniformity of the first heat exchanger 600, and also makes the temperature of the battery relatively uniform.

The fluid management device 1000 may further include a first adjusting valve 1400 ', the second flow channel is communicated with the inlet of the compressor 100 through the first adjusting valve 1400 ', and the first adjusting valve 1400 ' may adjust a pressure at an outlet of the second flow channel, so as to adjust a superheat degree of the dual-flow-channel heat exchanger 1600 ', adjust a heat exchange amount in the dual-flow-channel heat exchanger 1600 ', and further adjust a heat exchange amount between the battery and the compressor 100. If the temperature of the battery needs to be further accurately adjusted, the heat exchange amount in the dual-flow heat exchanger 1600 ' can be adjusted by controlling the opening degree of the first adjusting valve 1400 ' and the opening degree of the first expansion valve 1500 ', so as to adjust the heat exchange amount between the battery and the compressor 100. In this embodiment, the outlet of the first regulating valve 1400' is the second outlet 1003.

Separator 1200 'may also have a gas outlet, i.e., separator 1200' has both a gas outlet and a liquid outlet, and referring to fig. 1, the gas outlet may also be in communication with the inlet of compressor 100 via a second flow path, and the gaseous refrigerant discharged from separator 1200 'participates in the heat exchange in a two-flow heat exchanger 1600'. Referring to fig. 2, the gas outlet may also communicate with the inlet of the compressor 100 through the first regulating valve 1400'. The gas outlet may also be in communication with the inlet of compressor 100 and the gas discharged from separator 1200' may be passed to compressor 100 for the next cycle.

The fluid management device 1000 further includes a throttling portion 1800 ', the throttling portion 1800' can adjust and regulate the pressure of the gas discharged from the separator 1200 ', an outlet of the throttling portion 1800' is communicated with the gas outlet, or an outlet of the throttling portion 1800 'is the gas outlet of the separator 1200', the fluid management device 1000 is provided with the throttling portion 1800 'which can adjust the pressure of the gas outlet and the outlet of the compressor 100, and prevent the refrigerant at the outlet of the compressor 100 from entering the separator 1200'. The throttle 1800' may be an expansion valve or a capillary tube, and will not be described in detail.

Referring to fig. 2, the thermal management system further includes a second expansion valve 300 and a third heat exchanger 500, the second heat exchanger 200 can be communicated with the third heat exchanger 500 through the second expansion valve 300, an outlet of the third heat exchanger 500 is communicated with an inlet of the compressor 100, the third heat exchanger 500 is located in an air conditioning compartment of the vehicle, and the third heat exchanger 500 can regulate the temperature in the passenger compartment.

The two-flow heat exchanger 1600 ', the first regulating valve 1400', the first expansion valve 1500 'and the separator 1200' in the fluid management device 1000 may be connected by pipelines, or the above components may be integrated as one body, as illustrated in fig. 4 and 5, 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

1. The utility model provides a heat management system, includes compressor, first heat exchanger, second heat exchanger, separator, first expansion valve and two-flow heat exchanger, two-flow heat exchanger has first runner and second runner, refrigerant in the first runner with refrigerant can the heat exchange in the second runner, heat management system during operation, the compressor can pass through the second heat exchanger with the first port intercommunication of first runner, the second port of first runner passes through first expansion valve with the entry intercommunication of separator, the liquid outlet of separator with the entry intercommunication of first heat exchanger, the export of first heat exchanger passes through the second runner communicates with the entry of compressor.

2. The thermal management system of claim 1, further comprising a first regulator valve, the second flow passage communicating with an inlet of the compressor through the first regulator valve.

3. The thermal management system of claim 1 or 2, wherein the separator further comprises a gas outlet in communication with an inlet of the compressor, or the gas outlet is in communication with an inlet of the compressor through the second flow passage, or the gas outlet is in communication with an inlet of the compressor through the first regulating valve.

4. The thermal management system of claim 3, further comprising a throttle portion capable of regulating the pressure of the gas exiting the separator, an outlet of the throttle portion being in communication with the gas outlet or the outlet of the throttle portion being the gas outlet of the separator.

5. The thermal management system of any of claims 1-4, wherein the thermal management system is applied to a vehicle, and the first heat exchanger is a direct cold plate capable of regulating a temperature of a battery in the vehicle;

the heat management system further comprises a second expansion valve and a third heat exchanger, the third heat exchanger is located in an air conditioning box of the vehicle, and the second heat exchanger can be communicated with the third heat exchanger through the second expansion valve.

6. A heat management system comprises a compressor, a first heat exchanger, a fluid management device and a second heat exchanger, wherein the fluid management device comprises a first valve part, a first heat exchange part, a first cylinder and a second cylinder, the fluid management device is provided with a first valve port, a first cavity and a second cavity, the first valve part can adjust the opening degree of the first valve port, at least part of the first cavity is positioned between the first cylinder and the second cylinder along the radial direction of the first cylinder, at least part of the first heat exchange part is positioned in the first cavity, and the first heat exchange part is provided with a first heat exchange channel;

7. The thermal management system of claim 6, wherein the fluid management device further comprises a second valve portion having a second valve port, the second valve portion being configured to adjust an opening of the second valve port, the first cavity being configured to communicate with an inlet of the compressor through the second valve port.

8. The thermal management system of claim 6 or 7, wherein the fluid management device further comprises a gas outlet in communication with an inlet of the compressor, or the gas outlet is in communication with an inlet of the compressor through the first cavity, or the gas outlet is in communication with an inlet of the compressor through the first valve port.

9. The thermal management system of claim 8, wherein the fluid management device further comprises a restriction that is capable of regulating the pressure of the gas exiting the second chamber, an outlet of the restriction being in communication with the gas outlet or an outlet of the restriction being a gas outlet of a separator.

10. The thermal management system of any of claims 6-9, wherein the thermal management system is applied to a vehicle, and the first heat exchanger is a direct cooling plate capable of regulating a temperature of a battery in the vehicle;