KR20190132733A - Thermal management system - Google Patents

Abstract

According to the present invention, a thermal management system comprises: a refrigerant circulation line (220) including a compressor (210), a water cooling type condenser (220), a first expansion valve (240), and an evaporator (242), and circulating a refrigerant to heat the inside; a heating line (301) circulating cooling water heat-exchanged with the refrigerant through the water cooling type condenser (220) to heat the inside; a first cooling line (302) circulating cooling water heat-exchanged with air or the refrigerant to cool a battery (350) and electronic components (460); and a second cooling line (303) including a radiator (370) for motors and circulating the cooling water to cool a drive motor (470).

Description

Thermal management system

The present invention relates to a thermal management system, and more particularly, to a system for managing heat of electrical components and batteries in a vehicle as well as cooling and heating of a vehicle.

In recent years, electric vehicles have been in the spotlight as solutions to problems such as the implementation of environmentally friendly technologies and energy depletion.

Electric vehicles are driven by motors powered by batteries or fuel cells, so they emit less carbon and produce less noise. In addition, it is environmentally friendly because it uses a motor that is more energy efficient than a conventional engine.

However, electric vehicles generate a lot of heat during operation of electronic parts such as batteries and driving motors, so thermal management is important.

In particular, the drive motor generates a lot of heat relative to other electrical components such as batteries, inverters, and chargers. Therefore, the drive motor should be cooled to an appropriate temperature, and the cooling performance of the heat exchanger for cooling the drive motor should be increased. There is a need.

KR 2018-0007021 A (2018.01.22)

The present invention has been made to solve the above problems, an object of the present invention is to provide a thermal management system capable of thermal management of the drive motor and electrical components in the vehicle as well as cooling and heating of the vehicle.

In addition, to provide a thermal management system that can cool the drive motor to the appropriate temperature according to the condition to improve the cooling performance and cooling efficiency of the drive motor.

The thermal management system of the present invention for achieving the above object, the compressor 210, the water-cooled condenser 220, the first expansion valve 240 and the evaporator 242, the refrigerant is circulated to cool the room Refrigerant circulation line 220; Heating line 301 for heating the room by circulating the cooling water heat exchanged with the refrigerant through the water-cooled condenser 220; A first cooling line 302 for cooling the battery 350 and the electric component 460 by circulating cooling water that is heat-exchanged with air or the refrigerant; And a second cooling line 303 which includes a motor radiator 370 and circulates the cooling water to cool the driving motor 470.

In addition, the cooling water is circulated in the second cooling line 303 separately from the first cooling line 302 to cool the driving motor 370. The second cooling line 303 is for indoor cooling. The heating line 301 and the first cooling line 302 is connected to or disconnected from any one or more according to the mode or the indoor heating mode, in the indoor cooling mode, the heating line 301 and The first cooling line 302 is connected to each other, the second cooling line 303 is characterized in that the connection to the heating line 301 and the first cooling line 302 is blocked.

In addition, in the indoor heating mode, the drive motor 470 of the second cooling line 303 is connected to the heating line 301 or the first cooling line 302, in the indoor heating mode, The motor radiator 370 is characterized in that the flow of cooling water is blocked, the second cooling line 303 is branched from one side of the first cooling line 302 to the second cooling line 302. A third connection line 302-3 connected to the third connection line 302-3; And a fourth connection line 302-4 that is branched from the other side of the first cooling line 302 and connected to the second cooling line 303.

In addition, a third direction switching valve 380 is installed at one side of the driving motor 470 and a fourth direction switching valve 390 is installed at the other side of the driving motor 470 in the second cooling line 303. The driving motor 470 of the second cooling line 303 is connected to or disconnected from the first cooling line 302 by the third direction switching valve 380 and the fourth direction switching valve 390. The second cooling line 303 is provided with a fourth cooling water pump 360 for circulating the cooling water, and the refrigerant circulation line 200 includes the refrigerant discharged from the water-cooled condenser 220. A second expansion valve 225 for throttling or bypassing; And an air-cooled condenser 230 for exchanging the refrigerant discharged from the second expansion valve 225 with air to discharge the refrigerant to the first expansion valve 240.

In addition, the third expansion valve 251 to throttle, bypass or block the flow of the refrigerant discharged from the water-cooled condenser 220; And a chiller 252 for exchanging the refrigerant discharged from the third expansion valve 251 with the cooling water of the first cooling line 302. The first cooling line 302 further includes a fifth connection line 302-5 connected in parallel with the battery 350 and passing through the chiller 252, and the fifth connection. The line 302-5 is connected to the first cooling line 302 by the fifth diverter valve 330, and the coolant is connected to the fifth connecting line 302-5 by the fifth diverter valve 330. Is characterized in that the flow or the flow is blocked.

 In addition, the first cooling line 302 further comprises an electric field radiator 310 for cooling the cooling water with air, the heating line 301, the refrigerant through the water-cooled condenser 220 A heater core 440 for heating the room using the heated air by heat-exchanging the coolant to be heat-exchanged with the air introduced into the room; And a coolant heater 430 disposed in front of the heater core 440 in the flow direction of the coolant to heat the coolant. The second cooling line 303 further includes an oil cooler 473 connected to the motor radiator 370 and cooled by the coolant, and the driving motor 470 includes the front motor 471. ) And a rear motor 472, wherein the front motor 471 and the rear motor 472 are respectively connected to an oil cooler 473 and cooled by oil circulated.

In addition, the thermal management system includes a compressor 210, a water-cooled condenser 220, a first expansion valve 240 and the evaporator 242, the refrigerant circulation line 220 for cooling the room by circulating the refrigerant; Heating line 301 for heating the room by circulating the cooling water heat exchanged with the refrigerant through the water-cooled condenser 220; A first cooling line 302 for cooling the battery 350 by circulating coolant exchanged with air or the refrigerant; And a second cooling line 303 including a motor radiator 370 and circulating cooling water to cool the driving motor 470 and the electric component 460. It includes.

In addition, the cooling water is circulated in the second cooling line 303 separately from the first cooling line 302 to cool the driving motor 470 and the electric component 460, and the second cooling line ( 303 further includes an oil cooler 473 connected to the motor radiator 370 and cooled by coolant, and the drive motor 470 includes a front motor 471 and a rear motor 472. The front motor 471 and the rear motor 472 are each connected to an oil cooler 473 and cooled by oil circulated.

The thermal management system of the present invention is to provide a thermal management system that can improve the cooling performance and cooling efficiency of the drive motor by cooling the drive motor to an appropriate temperature according to the condition.

1 is a block diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating a system for recovering waste heat of an electric component, a driving motor, and a battery for heating in an indoor heating mode of the thermal management system according to the first embodiment of the present invention.
FIG. 3 is a diagram illustrating a system for heating a room using only waste heat of electric components and a driving motor without operating a refrigerant circulation line as a heat pump loop in a room heating mode of a heat management system according to a first embodiment of the present invention. .
4 is a configuration diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a second exemplary embodiment of the present invention.
FIG. 5 is a diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a third exemplary embodiment of the present invention.
6 is a block diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a fourth embodiment of the present invention.

Hereinafter, the thermal management system of the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

<Example 1>

1 is a block diagram showing a system in which a battery and electrical components are cooled by a radiator in a room cooling mode of a thermal management system according to an embodiment of the present invention.

As shown, the thermal management system of the present invention may be composed of a coolant circulation line 200 in which a coolant is circulated to cool the room, and a coolant circulation line 300 in which coolant is circulated. The cooling water circulation line 300 may include a heating line 301 for heating, a first cooling line 302 for cooling, and a second cooling line 303.

The refrigerant circulation line 200 includes the compressor 210, the first heat exchanger 220, the second expansion valve 225, the second heat exchanger 230, the first expansion valve 240, and the third expansion valve 251. ), A third heat exchanger 242, a fourth heat exchanger 252, and an accumulator 260.

The compressor 210 may be an electric compressor driven by electric power, and serves to suck and compress the refrigerant to discharge the refrigerant to the first heat exchanger 220.

The first heat exchanger 220 serves as a condenser and for example, a water-cooled condenser may be used. In addition, the first heat exchanger 220 exchanges the refrigerant discharged from the compressor 210 with the cooling water to condense the liquid refrigerant into the liquid refrigerant and send it to the second expansion valve 225.

The second expansion valve 225 may serve to throttle or bypass the refrigerant or block the flow of the refrigerant, and may be disposed behind the first heat exchanger 220 in the flow direction of the refrigerant.

The second heat exchanger 230 is an air-cooled condenser, and may function as a condenser or an evaporator functionally. That is, the function of the second heat exchanger 230 may vary according to the role of the second expansion valve 225. That is, when the refrigerant circulation line 200 is used as an air conditioner loop, the second expansion valve 225 bypasses the refrigerant, and the second heat exchanger 230 serves as a condenser together with the first heat exchanger 220. When the refrigerant circulation line 200 is used as a heat pump loop, the second expansion valve 225 throttles the refrigerant and the second heat exchanger 230 serves as an evaporator. The second heat exchanger 230 may be cooled by air cooling with the cooling fan 311.

The first expansion valve 240 and the third expansion valve 251 may serve to throttle or bypass the refrigerant or block the flow of the refrigerant. The first expansion valve 240 and the third expansion valve 251 may be configured in parallel. That is, the refrigerant line is branched into two lines from the rear of the second heat exchanger 230 in the flow direction of the refrigerant, and the first expansion valve 240 is disposed in one refrigerant line of the two branched refrigerant lines and the other The third expansion valve 251 may be disposed in one refrigerant line.

The third heat exchanger 242 corresponds to an evaporator and the fourth heat exchanger 252 corresponds to a chiller. In addition, the third heat exchanger 242 is disposed at the rear of the first expansion valve 240 in the flow direction of the refrigerant, and is provided in the air conditioner 150 of the vehicle and flows by the blower 152 of the air conditioner. Is cooled through the third heat exchanger 242 is supplied to the interior of the vehicle can be used for the indoor cooling of the vehicle.

The fourth heat exchanger 252 is disposed behind the third expansion valve 251 in the flow direction of the refrigerant, and may be heat-exchanged with the cooling water to cool or heat the cooling water. Thus, the first expansion valve 240 and the third heat exchanger 242 constitute one pair, and the third expansion valve 251 and the fourth heat exchanger 252 constitute one pair, and the two pairs are arranged in parallel on the refrigerant line. It is composed. In addition, the coolant lines may be joined to the rear sides of the third heat exchanger 242 and the fourth heat exchanger 252 in the refrigerant flow direction to form a single refrigerant line.

The accumulator 260 may serve to temporarily store the pressure of the refrigerant on the refrigerant line. In addition, the accumulator 260 may separate the liquid refrigerant and the gaseous refrigerant from the refrigerant, and supply only the gaseous refrigerant to the compressor 210. Here, the accumulator 260 is disposed and connected to a point where the refrigerant lines join at the rear side of the third heat exchanger 242 and the fourth heat exchanger 252, and the accumulator 260 is connected to the compressor 210 in the refrigerant flow direction. It can be placed behind the. Thus, the refrigerant sent back to the compressor 210 repeats the circulation cycle as described above.

The heating line 301 may include a first heat exchanger 220, a coolant heater 430, a fifth heat exchanger 440, a first coolant pump 450, and a first turn valve 410.

As described above, the first heat exchanger 220 may use a water-cooled condenser to exchange heat with each other while passing through the refrigerant and the cooling water.

The coolant heater 430 is a device for heating the coolant, and may be disposed in the rear of the first heat exchanger 220 and the front of the fifth heat exchanger 440 in the flow direction of the coolant. The coolant heater 430 may be operated when the temperature of the coolant is lower than a specific temperature, and may be variously formed such as an induction heater, a seed heater, a PTC heater, a film heater, and the like, which may generate heat using electric power.

The fifth heat exchanger 440 may be provided in the air conditioner 150 of the vehicle to serve as a heater core. That is, the air flowing by the blower 152 of the air conditioner 150 may be heated up through the fifth heat exchanger 440 and supplied to the interior of the vehicle to be used for heating the vehicle. The fifth heat exchanger 440 may be connected to the rear side of the coolant heater 430 in the flow direction of the coolant.

The first coolant pump 450 is a means for conveying the coolant to circulate the coolant along the heating line 301, and the first coolant pump 450 is disposed at the rear of the fifth heat exchanger 440 in the flow direction of the coolant. Can be connected.

The first directional valve 410 may be installed between the first cooling water pump 450 and the first heat exchanger 220, and the heating line 301 and the first cooling line 302 to be described later. It can be configured to selectively connect or disconnect. More specifically, the first diverter valve 410 is installed on the heating line 301 so that two coolant pipes are connected to the first diverter valve 410 and branched from one side of the first cooling line 302. One first connection line 302-1 is connected to the first diverter valve 410, and one second connection line 302-2 branched from the other side of the first cooling line 302 is first. It may be connected to the direction switching valve 410. That is, the first direction switching valve 410 is connected so that the four cooling water pipes meet, the first direction switching valve 410 is a four-way direction change that can adjust the state in which the four cooling water pipes are connected to each other or blocked It can be a valve.

Thus, the heating line 301 circulates the coolant along the first heat exchanger 220, the coolant heater 430, the fifth heat exchanger 440, the first coolant pump 450, and the first diverter valve 410. In addition, the cycle of flowing from the first directional valve 410 to the first heat exchanger 220 and circulating again may be repeated.

The first cooling line 302 is the sixth heat exchanger 310, the second diverter valve 320, the second coolant pump 420, the first diverter valve 410, the electric component 460, the third The cooling water pump 340, the battery 350, the fourth heat exchanger 252, and the fifth diverter valve 330 may be included.

The sixth heat exchanger 310 serves as an electric radiator for cooling the cooling water, and the sixth heat exchanger 310 may be cooled by air cooling with the cooling fan 311.

The second direction switching valve 320 is installed on the first cooling line 302 so that two coolant pipes are connected to the second direction switching valve 320, and the heating line 301 and the first cooling line 302 are provided. The first direction switching valve 410 and the second direction switching valve 320 may be connected to the first connection line (302-1) so that the connection. That is, the second direction switching valve 320 is connected so that three coolant pipes meet, the second direction switching valve 320 is a three-way direction change that can control the three coolant pipes connected to each other or blocked It can be a valve.

The second coolant pump 420 is a means for feeding the coolant to circulate the coolant along the first cooling line 302. The second coolant pump 420 is installed in the first connection line 302-1 between the first diverter valve 410 and the second diverter valve 320 to operate the second coolant pump 420. Cooling water may flow from the second direction switching valve 320 toward the first direction switching valve 410.

The electrical component 460 is disposed in the second connection line 302-2 connecting the confluence 312 formed in the first cooling line 302 and the first diverter valve 410 to the electrical component by cooling water. 460 may be cooled. Alternatively, the electrical component 460 may be disposed in the first connection line 302-1 connecting the first direction switching valve 410 to the second direction switching valve 320. The electrical component 460 may be an inverter, an on board charger (OBC), or the like.

The third coolant pump 340 is a means for conveying the coolant to circulate the coolant along the first cooling line 302, and the third coolant pump 340 is the second directional valve 320 and the battery 350 In between, the coolant may flow from the third coolant pump 340 toward the battery 350 by the operation of the third coolant pump 340. In this case, the third coolant pump 340 may be disposed in the coolant line connected to the right side at the branch portion 313 to which the four coolant pipes on the right side of the second directional valve 320 are connected.

The battery 350 may be a power source of the vehicle and may be a drive source of the driving motor 470 and the electric component 460 in the vehicle. Alternatively, the battery 350 may be connected to the fuel cell to store electricity or to store electricity supplied from the outside. The battery 350 may be disposed at the rear of the third coolant pump 340 in the flow direction of the coolant, and the battery 350 may be cooled by heat exchange with the flowing coolant.

The fourth heat exchanger 252 is disposed in the coolant line connected downwardly from the branch portion 313, and is on the fifth connection line 302-5 connecting the branch portion 313 and the fifth direction switching valve 330. Can be placed in. Thus, the coolant and the coolant may be heat-exchanged in the fourth heat exchanger 252, so that the coolant may be cooled by the coolant or vice versa.

The fifth direction switching valve 330 may be installed on the first cooling line 302 so that three cooling water pipes may be connected to the fifth direction switching valve 330. The fifth direction switching valve 330 may be connected to the coolant pipe on the right side of the confluence 312 and the coolant pipe connected downward from the fourth heat exchanger 252 and the coolant pipe connected downward from the battery 350. That is, in the fifth directional valve 330, three coolant pipes meet, and the fifth directional valve 330 may be a three-way directional valve in which three coolant pipes may be connected or blocked. Can be.

The second cooling line 303 may include a seventh heat exchanger 370, a third diverter valve 380, a drive motor 470, a fourth coolant pump 360, and a fourth diverter valve 390. Can be.

The seventh heat exchanger 370 serves as a radiator for motor cooling to cool the cooling water, and the seventh heat exchanger 370 may be cooled by air cooling with the cooling fan 311.

The third diverter valve 380 is installed at the rear of the seventh heat exchanger 370 in the flow direction of the coolant so that two coolant pipes are connected to the third diverter valve 380, and the first cooling line 302 is provided. And the third direction switching valve 380 may be connected to the third connection line 302-3. Thus, the third direction switching valve 380 is connected so that the three cooling water pipes meet, the third direction switching valve 380 is a three-way direction switching valve that can control the three coolant pipes connected to each other or blocked Can be At this time, one side of the third connection line 303-3 may be connected to the third direction switching valve 380, and the other side thereof may be connected to the branch portion 313.

The driving motor 470 is a driving means of the vehicle and may be operated by receiving power from the battery 350. In addition, the driving motor 470 may be disposed at a rear side of the seventh heat exchanger 370 in the flow direction of the coolant to exchange heat with the coolant to cool it.

The fourth coolant pump 360 is a means for conveying the coolant to circulate the coolant along the second cooling line 303, and the fourth coolant pump 360 is the fourth direction switching valve 390 and the driving motor 470. The cooling water may flow from the driving motor 470 toward the seventh heat exchanger 370 by the operation of the fourth cooling water pump 360.

The fourth diverter valve 390 is installed at the rear of the fourth coolant pump 360 in the flow direction of the coolant, so that two coolant pipes are connected to the fourth diverter valve 390 and the first cooling line 302 is provided. And the fourth direction switching valve 390 may be connected to the fourth connection line 302-4. Thus, the fourth diverter valve 390 is connected so that three coolant pipes meet, and the fourth diverter valve 390 is a three-way divert valve capable of controlling a state in which three coolant pipes are connected to or disconnected from each other. Can be At this time, one side of the fourth connection line 302-4 may be connected to the fourth direction switching valve 390, and the other side thereof may be connected to the confluence unit 312.

Thus, a second drive motor 470 including a seventh heat exchanger 370, which generates relatively more heat than the electrical component 460 or the battery 350 such as an inverter and a charger, and has a separate cooling water circulated. Since the cooling is performed using the cooling line 303, the cooling and heating efficiency of the driving motor may be improved by cooling the driving motor to an appropriate temperature according to the condition as well as cooling and heating the vehicle.

In addition, the air conditioner 150 has a blower 152 installed on one side to blow air, and a temperature control door 151 may be installed inside the air conditioner 150. In addition, the third heat exchanger 242 corresponding to the evaporator in the air conditioner and the fifth heat exchanger 440 corresponding to the heater core are provided with air discharged from the blower 152 according to the operation of the temperature control door 151. After passing through only the three heat exchanger 242, or may be arranged and configured to be introduced into the room after passing through the third heat exchanger 242 to pass through the fifth heat exchanger 440.

Hereinafter, the operation according to the operation mode of the thermal management system described above will be described.

1.In the indoor cooling mode, the drive motor is cooled by the seventh heat exchanger and the electric parts and batteries are cooled by the sixth heat exchanger.

1 is a block diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a first embodiment of the present invention.

Referring to FIG. 1, the compressor 210 of the refrigerant circulation line 200 operates to discharge the refrigerant of high temperature and high pressure from the compressor 210. The refrigerant discharged from the compressor 210 is cooled by heat exchange with the cooling water in the first heat exchanger 220. Subsequently, the refrigerant cooled in the first heat exchanger 220 is introduced into the second heat exchanger 230 by bypassing the second expansion valve 225, and the refrigerant is heat-exchanged with external air in the second heat exchanger 230. Is cooled. That is, both the first heat exchanger 220 and the second heat exchanger 230 serve as a condenser to condense the refrigerant. The condensed refrigerant is then throttled while passing through the first expansion valve 240, and after the refrigerant is expanded, passes through a third heat exchanger 242 to exchange heat with air blown by the blower 152 of the air conditioning device 150. As the refrigerant evaporates, the air is cooled, thereby cooling the room by supplying the cooled air to the interior of the vehicle. The refrigerant evaporated in the third heat exchanger 242 is introduced into the compressor 210 again through the accumulator 260, and the refrigerant is circulated while repeating the above process. In this case, the third expansion valve 251 may block the flow of the refrigerant so that the refrigerant does not flow in the direction of the fourth heat exchanger 252.

Meanwhile, the coolant of the coolant circulation line 300 is circulated by the operation of the first coolant pump 450, the second coolant pump 420, the third coolant pump 340, and the fourth coolant pump 360. Here, the cooling water circulation line 300 may be connected to the heating line 301 and the first cooling line 302 so that the cooling water may flow, and the second cooling line 303 may be the heating line 301 and the first cooling line. The connection to the line 302 is cut off, so that the second cooling line 303 forms a separate closed loop so that the coolant can be circulated.

In this case, the heating line 301 and the first cooling line 302 which are connected to each other and communicate with the cooling water are operated by the operation of the first cooling water pump 450, the second cooling water pump 420, and the third cooling water pump 340. Cooling water is circulated. The coolant, the electric component 460, and the battery 350 that pass through the first heat exchanger 220 are cooled by the coolant, and the heated coolant is operated by the cooling fan 311 in the sixth heat exchanger 310. It can be cooled by heat exchange with the outside air. More specifically, the first direction switching valve 410 may be connected to the upper side and the left side so that the coolant is circulated and the lower side and the right side are connected to each other so that the coolant can be circulated. In addition, the second direction switching valve 320 is connected to both the left side, the lower side and the right side so that the coolant may be distributed. In addition, the fifth direction switching valve 330 is connected to the left and right sides of each other can be passed through the cooling water, the upper side is disconnected, the fifth connecting the branch portion 313 and the fifth direction switching valve 330 Cooling water may not flow through the connection line 302-5. Thus, the coolant is formed from the first coolant pump 450 to the first diverter valve 410, the electric component 460, the confluence 312, the sixth heat exchanger 310, the second diverter valve 320, and the first diverter valve 320. 2 through the coolant pump 420, the first directional valve 410, the first heat exchanger 220, the coolant heater 430, and the fifth heat exchanger 440, and then back to the first coolant pump 450 The cycle of inflow and circulation is repeated. In addition, the branch 313, the third coolant pump 340, the battery 350, and the fifth diverter valve 330 are connected in parallel with the electric component 460, and thus, in the second diverter valve 320. The branched coolant passes through the electric component 460 at the confluence unit 312 through the branch portion 313, the third coolant pump 340, the battery 350, and the fifth direction switching valve 330. The cycle that is joined and flows back to the sixth heat exchanger 310 is repeated.

In addition, in the second cooling line 303 in which the coolant is circulated by forming a separate closed loop, the coolant is circulated by the operation of the fourth coolant pump 360, and the driving motor 470 is cooled by the coolant. The coolant passing through the seven heat exchangers 370 may be exchanged with the outside air to be cooled by the operation of the fan 311. In more detail, the third direction switching valve 380 is connected to the left side and the lower side to allow the coolant to flow. In addition, the fourth direction switching valve 390 may be connected to the left side and the upper side to allow the coolant to flow. Thus, the coolant is sequentially passed through the fourth coolant pump 360 through the fourth diverter valve 390, the seventh heat exchanger 370, the third diverter valve 380, and the driving motor 470. The cycle that enters and circulates in the pump 360 is repeated. At this time, the upper side of the third direction switching valve 380 is disconnected from the left and the lower side, the cooling water in the third connection line (302-3) connecting the third direction switching valve 380 and the branch portion 313 May not flow. In addition, the lower side of the fourth direction switching valve 390 is disconnected from the left side and the upper side of the fourth connection line (302-4) connecting the fourth direction switching valve 390 and the confluence 312, the coolant May not flow.

2. Heat recovery of electric parts, drive motor and battery waste in indoor heating mode

FIG. 2 is a block diagram illustrating a system for recovering waste heat of an electric component, a driving motor, and a battery for heating in an indoor heating mode of the thermal management system according to the first embodiment of the present invention.

Referring to FIG. 2, the refrigerant circulation line 200 operates as a heat pump loop. The compressor 210 of the refrigerant circulation line 200 is operated to discharge the refrigerant of high temperature and high pressure from the compressor 210, and the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the first heat exchanger 220. , The cooling water is heated by the refrigerant. Subsequently, the refrigerant cooled in the first heat exchanger 220 is throttled and expanded through the second expansion valve 225, and the refrigerant introduced into the second heat exchanger 230 is heat-exchanged with the external air to evaporate and heat outside. Absorb it. That is, the first heat exchanger 220 serves as a condenser, and the second heat exchanger 230 serves as an evaporator. Thereafter, the refrigerant passing through the second heat exchanger 230 is introduced into the fourth heat exchanger 252 by bypassing the third expansion valve 251. Is heated and the cooling water is cooled. The refrigerant passing through the fourth heat exchanger 252 is introduced into the compressor 210 again through the accumulator 260, and the refrigerant is circulated while repeating the above process. In this case, the first expansion valve 240 may block the flow of the refrigerant so that the refrigerant does not flow in the direction of the third heat exchanger 242.

Meanwhile, in the cooling water circulation line 300, the heating line 301 forms a closed loop so that the connection between the first cooling line 302 and the second cooling line 303 is blocked. A portion of the second cooling line 303 is connected to the first cooling line 302 to communicate the coolant. At this time, the heating line 301 is circulated by the cooling water by the operation of the first cooling water pump 450 is heated by absorbing heat from the refrigerant, and heats the room using the heated cooling water. Part of the first cooling line 302 and the second cooling line 303 in communication with the cooling water is operated by the operation of the second cooling water pump 420, the third cooling water pump 340, and the fourth cooling water pump 360. The coolant is heated by absorbing the waste heat of the electric component 460, the driving motor 470, and the battery 350, and then the coolant is heated by transferring the heat of the coolant to the coolant in the fourth heat exchanger 252. Thus, the heat of the heated refrigerant is transferred from the first heat exchanger 220 back to the cooling water of the heating line 301 so that the cooling water of the heating line 301 may be used for indoor heating. More specifically, the first direction switching valve 410 is connected to each other and the upper side and the right side may be passed through the cooling water and the lower side and the left side may be connected to each other through the cooling water. In addition, the second direction switching valve 320 may be connected to the right side and the lower side, and the coolant may be distributed and the left side may be disconnected. In addition, the third direction switching valve 380 may be connected to the upper side and the lower side and the left side may be disconnected, and the fourth direction switching valve 390 may also be connected to the upper side and the lower side, and the left side may be disconnected. In addition, the fifth direction switching valve 330 may be connected to all of the upper side, left side and right side. Thus, the cooling water of the heating line 301 sequentially turns from the first cooling water pump 450 to the first direction switching valve 410, the first heat exchanger 220, the coolant heater 430, and the fifth heat exchanger 440. After passing through the first coolant pump 450, the cycle is repeated. At this time, heat is exchanged with the air blown by the blower 152 of the air conditioning apparatus 150 while passing through the fifth heat exchanger 440, and the air is heated, thereby supplying the heated air to the interior of the vehicle to perform indoor heating. In addition, the cooling water of the first cooling line 302 and the second cooling line 303 flows from the fourth heat exchanger 252 to the branch portion 313 and branches in three directions from the branch portion 313 to the left side. The branched coolant is the second diverter valve 320, the second coolant pump 420, the first diverter valve 410, the electric component 460, the confluence 312, and the fifth diverter valve 330. The cycle is repeated through the fourth heat exchanger 252 and circulated again, and the coolant branched upward is the third direction switching valve 380, the drive motor 470, the fourth coolant pump 360, and the third coolant pump 360. Through the four-way switching valve 390, the confluence portion 312, the fifth direction switching valve 330 is introduced to the fourth heat exchanger 252 and circulated again, the cooling water branched to the right is the third Through the coolant pump 340, the battery 350, and the fifth direction switching valve 330, the cycle that is introduced into the fourth heat exchanger 252 and circulated again is repeated. Here, the cooling water may not flow from the second direction switching valve 320 to the confluence portion 312 through the sixth heat exchanger 310 by the second direction switching valve 320. In addition, the cooling water is supplied from the third direction switching valve 380 to the fourth direction switching valve 390 through the seventh heat exchanger 370 by the third direction switching valve 380 and the fourth direction switching valve 390. May not flow. In addition, when the indoor heating load is large, the cooling water heater 430 may be operated to heat the cooling water and use it for indoor heating.

3. Heat recovery of electric parts and driving motor waste heat when refrigerant circulation line is not operated in indoor heating mode

FIG. 3 is a diagram illustrating a system for heating a room using only waste heat of electric components and a driving motor without operating a refrigerant circulation line as a heat pump loop in a room heating mode of a heat management system according to a first embodiment of the present invention. .

Referring to Figure 3, as described above, when the refrigerant circulation line is not operated in the indoor heating mode, only the waste heat of the electrical components and the drive motor to heat the room, that is, the refrigerant circulation line 200 is operated as a heat pump loop If not, the room can be heated using only the waste heat from the electrical components and drive motors.

At this time, the refrigerant circulation line 200 does not operate and the refrigerant is not circulated. In the cooling water circulation line 200, a part of the first cooling line 302 and a part of the second cooling line 303 are connected to the heating line 301 so that the coolant circulates, the electric component 460 and the driving motor 470. ) Absorbs waste heat.

More specifically, a part of the first cooling line 302 and a part of the second cooling line 303 in communication with the heating line 301 may be used to operate the first coolant pump 450 and the second coolant pump 420. By the coolant is circulated, the third coolant pump 340 is not operated, the fourth coolant pump 360 is not operated and the coolant may be bypassed. The first directional valve 410 is connected to the left and the upper side and the coolant is circulated, and the right and the lower side are connected to each other and the coolant may be circulated. In addition, the second direction switching valve 320 may be connected to the right side and the lower side, and the coolant may be distributed and the left side may be disconnected. In addition, the third direction switching valve 380 may be connected to the upper side and the lower side and the left side may be disconnected, and the fourth direction switching valve 390 may also be connected to the upper side and the lower side, and the left side may be disconnected. In addition, the fifth direction switching valve 330 may be disconnected from the left side, the upper side and the right side may be connected to each other. Thus, the cooling water of the heating line 301 is from the first coolant pump 450 to the first diverter valve 410, the electric component 460, the confluence 312, the fourth diverter valve 390, and the fourth coolant. Pump 360, drive motor 470, the third diverter valve 380, branch 313, the second diverter valve 320, the second coolant pump 420, the first diverter valve 410 ), The first heat exchanger 220, the coolant heater 430, and the fifth heat exchanger 440 are sequentially cycled back to the first coolant pump 450. At this time, heat is exchanged with the air blown by the blower 152 of the air conditioning apparatus 150 while passing through the fifth heat exchanger 440, and the air is heated, thereby supplying the heated air to the interior of the vehicle to perform indoor heating. Here, the cooling water may not flow from the second direction switching valve 320 to the confluence portion 312 through the sixth heat exchanger 310. In addition, the coolant may not flow from the third direction switching valve 380 to the fourth direction switching valve 390 via the seventh heat exchanger 370. In addition, the coolant flows from the confluence portion 312 to the fifth turn valve 330, the battery 350, the third coolant pump 340, and the branch portion 313 by the fifth turn valve 330. The cooling water may not flow from the fifth direction switching valve 330 to the fourth heat exchanger 252 and the branch portion 313. The air is heated by heat exchange with the air blown by the blower 152 through the fifth heat exchanger 440 in the cooling air conditioner 150 to supply the heated air to the interior of the vehicle, thereby heating the room. Therefore, when the indoor heating load is small, such as spring or autumn, the indoor space can be easily heated using only the waste heat of the electric component 460 and the driving motor 470 without operating the refrigerant circulation line 200 as a heat pump loop. have.

<Example 2>

4 is a configuration diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a second exemplary embodiment of the present invention.

Referring to FIG. 4, the thermal management system according to the second embodiment of the present invention may have the same configuration as that of the first embodiment and the second cooling line 303. Here, the second cooling line 303 of the thermal management system according to the second embodiment of the present invention further includes an oil cooler 473, and the driving motor 470 includes a front motor for driving the wheels in front of the vehicle. 471 and a rear motor 472 for driving the rear wheels. At this time, the oil cooler 473 is disposed between the third directional valve 380 and the fourth coolant pump 360, and the oil of the oil cooler 473 is cooled by the coolant cooled in the seventh heat exchanger 370. Is cooled. The front motor 471 and the rear motor 472 are connected to the oil cooler 473 in parallel so that the front motor 471 and the rear motor 472 may be cooled while the oil circulates. In addition, an oil pump 474 may be installed in an oil line connecting the oil cooler 473 and the front motor 471 and an oil line connecting the oil cooler 473 and the rear motor 472 to circulate oil. have. That is, the thermal management system according to the second embodiment of the present invention replaces the drive motor 470 with the oil cooler 473 in the second cooling line 303 of the first embodiment, and the front motor ( 471) and the rear motor 472 to circulate the oil to cool the motors. And the thermal management system according to the second embodiment of the present invention can operate in the same manner as the first embodiment in the cooling mode or heating mode.

<Example 3>

FIG. 5 is a diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a third exemplary embodiment of the present invention.

Referring to FIG. 5, the thermal management system according to the third embodiment of the present invention may be configured in the first embodiment only in the arrangement of the electric component 460, and the rest of the thermal management system is the same. That is, as shown in the thermal management system according to the third embodiment of the present invention, the electrical component 460 is installed in the second cooling line 303 between the third direction switching valve 380 and the drive motor 470. Can be arranged. At this time, the electrical component 460 is not installed or connected to any other part except the second cooling line (303). Thus, the electric component 460 and the driving motor 470 may be cooled by the coolant cooled in the seventh heat exchanger 370 while circulating the second cooling line 303. And the thermal management system according to the third embodiment of the present invention can operate in the same manner as the first embodiment in the cooling mode or heating mode.

<Example 4>

6 is a block diagram illustrating a system in which a driving motor, an electric component, and a battery are cooled in an indoor cooling mode of a thermal management system according to a fourth embodiment of the present invention.

Referring to FIG. 6, the thermal management system according to the fourth embodiment of the present invention replaces the drive motor 470 with the oil cooler 473 in the third embodiment, and the front motor 471 and the oil cooler 473 in the third embodiment. The rear motor 472 is connected to circulate oil to cool the motors. In addition, the rest can be configured in the same manner. Here, the cooling of the front motor 471 and the rear motor 472 using the oil cooler 473 is the same as that of the second embodiment. And the thermal management system according to the fourth embodiment of the present invention can operate in the same manner as the first embodiment in the cooling mode or heating mode.

The present invention is not limited to the above-described embodiments, and the scope of application of the present invention is not limited to those of ordinary skill in the art to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications can be made.

150: air conditioner 151: temperature control door
152 blower
200: refrigerant circulation line 210: compressor
220: first heat exchanger (water cooling condenser) 225: second expansion valve
230: second heat exchanger (air cooling condenser) 240: first expansion valve
242: third heat exchanger (evaporator) 251: third expansion valve
252: fourth heat exchanger (chiller) 260: accumulator
300: cooling water circulation line 301: heating line
302: first cooling line 303: second cooling line
302-1: First connection line 302-2: Second connection line
302-3: third connection line 302-4: fourth connection line
302-5: 5th connection line
310: 6th heat exchanger (electric radiator)
311: cooling fan
312: confluence 313: branch
320: second direction switching valve 330: fifth direction switching valve
340: third coolant pump 350: battery
360: 4th coolant pump
370: 7th heat exchanger (radiator for motor)
380: third direction switching valve 390: fourth direction switching valve
410: first direction switching valve 420: second coolant pump
430 coolant heater
440: fifth heat exchanger (heater core)
450: first coolant pump 460: electrical components
470: drive motor 471: front motor
472: rear motor 473: oil cooler
474: Oil Pump

Claims (18)

A refrigerant circulation line (220) including a compressor (210), a water-cooled condenser (220), a first expansion valve (240), and an evaporator (242), and circulating a refrigerant to cool the room;
Heating line 301 for heating the room by circulating the cooling water heat exchanged with the refrigerant through the water-cooled condenser 220;
A first cooling line 302 for cooling the battery 350 and the electric component 460 by circulating cooling water that is heat-exchanged with air or the refrigerant; And
A second cooling line 303 including a motor radiator 370 and circulating cooling water to cool the driving motor 470;
Thermal management system comprising a.
The method of claim 1,
Cooling water is circulated in the second cooling line (303) separately from the first cooling line (302), the thermal management system, characterized in that the drive motor (370) is cooled.
The method of claim 1,
The second cooling line (303) is connected to any one or more of the heating line (301) and the first cooling line (302) in accordance with the indoor cooling mode or room heating mode or the heat management system, characterized in that the connection is blocked.
The method of claim 3,
In the indoor cooling mode,
The heating line 301 and the first cooling line 302 are connected to each other, the second cooling line 303 is characterized in that the connection to the heating line 301 and the first cooling line 302 is blocked. Thermal management system.
The method of claim 3,
In the indoor heating mode,
The drive motor (470) of the second cooling line (303) is a thermal management system, characterized in that connected to the heating line (301) or the first cooling line (302).
The method of claim 5,
In the indoor heating mode,
The motor radiator 370 is a thermal management system, characterized in that the flow of cooling water is blocked.
The method of claim 1,
The second cooling line 303 is,
A third connection line 302-3 branched from one side of the first cooling line 302 and connected to the second cooling line 302; And a fourth connection line 302-4 connected to the second cooling line 303 by branching from the other side of the first cooling line 302. Thermal management system comprising a.
The method of claim 7, wherein
The second cooling line 303 is provided with a third direction switching valve 380 on one side of the drive motor 470 and the fourth direction switching valve 390 is installed on the other side of the driving motor 470. The driving motor 470 of the second cooling line 303 is connected to or disconnected from the first cooling line 302 by the three-way switching valve 380 and the fourth direction switching valve 390. Thermal management system.
The method of claim 1,
The second cooling line (303) is a thermal management system, characterized in that the fourth cooling water pump 360 for circulating the cooling water is installed.
The method of claim 1,
The refrigerant circulation line 200,
A second expansion valve 225 for throttling or bypassing the refrigerant discharged from the water-cooled condenser 220; And an air-cooled condenser (230) for exchanging the refrigerant discharged from the second expansion valve (225) with air to discharge the refrigerant to the first expansion valve (240).
The method of claim 1,
A third expansion valve 251 for throttling, bypassing or blocking the flow of the refrigerant discharged from the water-cooled condenser 220; And
A chiller (252) for exchanging the refrigerant discharged from the third expansion valve (251) with the cooling water of the first cooling line (302);
Thermal management system further comprising.
The method of claim 11,
The first cooling line 302 is,
The battery 350 further includes a fifth connection line 302-5 connected in parallel with the battery 350 and passing through the chiller 252, and the fifth connection line 302-5 is the fifth direction switching valve 330. Is connected to the first cooling line (302) by the heat management system, characterized in that the coolant flows or flow is blocked in the fifth connection line (302-5) by the fifth direction switching valve (330).
The method of claim 1,
The first cooling line (302) further comprises a electrical radiator (310) for cooling the cooling water with air.
The method of claim 1,
The heating line 301 is,
A heater core 440 for heating the room using the heated air by heat-exchanging the coolant heat exchanged with the refrigerant through the water-cooled condenser 220 and the air introduced into the room; And a coolant heater 430 disposed in front of the heater core 440 in the flow direction of the coolant to heat the coolant. Thermal management system comprising a.
The method of claim 1,
The second cooling line 303 is,
It further includes an oil cooler 473 connected to the motor radiator 370 and cooled by the coolant, wherein the drive motor 470 includes a front motor 471 and a rear motor 472,
The front motor (471) and the rear motor (472) are respectively connected to an oil cooler (473) thermal management system, characterized in that cooled by the oil circulated.
A refrigerant circulation line (220) including a compressor (210), a water-cooled condenser (220), a first expansion valve (240), and an evaporator (242), and circulating a refrigerant to cool the room;
Heating line 301 for heating the room by circulating the cooling water heat exchanged with the refrigerant through the water-cooled condenser 220;
A first cooling line 302 for cooling the battery 350 by circulating coolant that is heat-exchanged with air or the refrigerant; And
A second cooling line 303 including a motor radiator 370 and circulating cooling water to cool the driving motor 470 and the electric component 460;
Thermal management system comprising a.
The method of claim 16,
Cooling water is circulated in the second cooling line (303) separately from the first cooling line (302), the thermal management system, characterized in that the drive motor (470) and the electrical component (460) is cooled.
The method of claim 16,
The second cooling line 303 is,
It further includes an oil cooler 473 connected to the motor radiator 370 and cooled by the coolant, wherein the drive motor 470 includes a front motor 471 and a rear motor 472,
The front motor (471) and the rear motor (472) are respectively connected to an oil cooler (473) thermal management system, characterized in that cooled by the oil circulated.

Images