KR20200038032A - Thermal management system - Google Patents

Abstract

The present invention relates to a thermal management system. The thermal management system includes: a refrigerant circulation line including a compressor, a water-cooling condenser, a first expansion valve, an air-cooling condenser, a second expansion valve, an evaporator and a refrigerant heat exchanger which mutually exchanges heat between a refrigerant flowing into the second expansion valve and a refrigerant discharged from the evaporator, and cooling an indoor area by circulating the refrigerants; a heating line heating the indoor area by circulating cooling water exchanging heat with the refrigerants through the water-cooling condenser; and a cooling line cooling a battery and electronic components by circulating the cooling water exchanging heat with the refrigerants or air. Therefore, the thermal management system enables the efficient thermal management of a battery and electronic components in a vehicle as well as the heating and cooling of the vehicle, and improves the performance of a heat pump and the efficiency of the system.

Description

Thermal management system

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

In recent years, the electric vehicle has been spotlighted as a solution to problems such as the implementation of environmentally friendly technologies and energy depletion in the automotive field.

Electric vehicles are driven by a motor driven by receiving power from a battery or a fuel cell, resulting in low carbon emissions and low noise. In addition, the electric vehicle is environmentally friendly because it uses a motor that is more energy efficient than the conventional engine.

However, since electric vehicles generate a lot of heat when the battery and the driving motor are operated, thermal management is important. And since it takes a long time to recharge the battery, it is important to efficiently manage the battery usage time. In particular, since the electric vehicle is also driven by electricity, the refrigerant compressor driven for indoor air conditioning is more important. In addition, since the drive motor and the inverter generate a lot of heat compared to other electric components such as a battery or a charger, the drive motor must be cooled to an appropriate temperature, and for this, it is necessary to increase the cooling performance of the heat exchanger for cooling the drive motor There is this.

In addition, in the heat pump mode of the heat management system, the refrigerant pressure at the inlet side of the compressor is lowered due to the refrigerant heat exchanger, so that it cannot function as a heat pump or performance and efficiency may be deteriorated.

KR 2014-0147365 A (2014.12.30)

The present invention has been devised to solve the problems as described above, and the object of the present invention is to provide efficient cooling and heating of vehicle components and batteries, as well as cooling and heating of vehicles, and improve heat pump performance and system efficiency. It is to provide a thermal management system that can be done.

The heat management system of the present invention for achieving the above object is a compressor 210, a water-cooled condenser 220, a first expansion valve 225, an air-cooled condenser 230, a third expansion valve 251 and a chiller ( 252) is a refrigerant closed loop, which is sequentially connected to distribute refrigerant, is disposed between the air-cooled condenser 230 and the third expansion valve 251 and between the chiller 252 and the compressor 210 to distribute the refrigerant. , A cooling line including a second expansion valve 225 and an evaporator 242, a refrigerant disposed in the cooling line, and a refrigerant flowing into the second expansion valve 225 and a refrigerant discharged from the evaporator 242 mutually A refrigerant circulation line 200 including a refrigerant heat exchanger 233 to exchange heat; A heating line 301 for heating the room by circulating the cooling water; And a cooling line 302 for circulating air or the cooling water to cool the battery 350 and the electric component 460. It may include.

In addition, the refrigerant heat exchanger 233 heat exchanges refrigerant flowing into the second expansion valve 240 and refrigerant discharged from the evaporator 242 in the cooling mode, and the second expansion valve 240 in the heating mode. ) And the refrigerant discharged from the evaporator 242 may not be exchanged.

In addition, the cooling line 302, a first connection line 302-1 branched from one side of the cooling line 302 and connected to the heating line 301; And a second connection line 302-2 branched from the other side of the cooling line 302 and connected to the heating line 301.

In addition, the first connection line 302-1, the second connection line 302-2 and the heating line 301 are connected to the first direction change valve 410, and the first direction change valve 410 By this, the cooling line 302 and the heating line 301 may be connected to each other or the connection may be blocked.

Further, the electrical component 460 may be disposed on the second connection line 302-2.

In addition, the cooling line 302 includes a fourth connection line 302-4 connecting the first connection line 302-1 and the second connection line 302-2, and the fourth connection line ( 302-4) may further include a shutoff valve 360 installed in parallel with the first direction switching valve 410.

In addition, the cooling line 302 may further include a cooling water temperature sensor 461 installed in front of the electric component 460 in the flow direction of the cooling water.

In addition, the refrigerant heat exchanger 233 may be connected to the air-cooled condenser 230 and the chiller 252 in parallel.

In addition, the refrigerant heat exchanger 233 may be connected to the evaporator 242 in series.

In addition, the cooling line 302 is connected to the battery 350 in parallel and includes a third connection line 302-3 passing through the chiller 252, and the third connection line 302-3 Is connected to the cooling line 302 by the third direction switching valve 330, the cooling water flows through the third connection line 302-3 or the flow may be blocked by the third direction switching valve 330. have.

In addition, an accumulator 260 disposed between and connected to the evaporator 242 and the compressor 210 may be further included.

In addition, the refrigerant heat exchanger 233 and the accumulator 260 may be integrally formed.

In addition, the cooling line 302 may include an electric radiator 310 for cooling the cooling water with air.

In addition, the heating line 301, a heat exchanger with the refrigerant through the water-cooled condenser 220 and heat exchanged air flowing into the room and the heater core 440 to heat the room using the heated air, and cooling water It may be disposed in front of the heater core 440 in the flow direction may include a cooling water heater 430 for heating the cooling water.

In addition, the heating line 301 includes a heater core 440 that heats the room using heated air by heat-exchanging coolant heat exchanged with refrigerant through the water-cooled condenser 220 and air entering the room, wherein the It is configured separately from the heating line 301 and may further include an air-heated heater 470 that directly heats the air flowing into the room to heat the room.

In addition, in the mild cooling mode, the third expansion valve 251 is blocked so that the refrigerant may not pass through the chiller 252.

In addition, in the battery heating mode, the refrigerant circulation line 200 may not circulate the refrigerant.

In addition, in the mild heating mode, the refrigerant circulation line 200 may not circulate the refrigerant.

The thermal management system of the present invention has an advantage that enables efficient heat management of electric components and batteries in the vehicle as well as cooling and heating of the vehicle.

In addition, since the pressure drop of the refrigerant can be minimized in the heat pump mode, the pressure of the refrigerant flowing into the compressor increases, thereby improving the performance of the heat pump and improving the efficiency of the system.

1 is a block diagram showing a thermal management system according to an embodiment of the present invention.
2 is a configuration diagram showing an operating state in the maximum cooling mode of the heat management system according to an embodiment of the present invention.
3 is a configuration diagram showing an operating state in a mild cooling mode of a heat management system according to an embodiment of the present invention.
4 is a configuration diagram showing an operating state in the cooling mode dedicated to the battery of the thermal management system according to an embodiment of the present invention.
5 is a configuration diagram showing the operating state in the maximum heating mode of the heat management system according to an embodiment of the present invention.
6 is a configuration diagram showing an operating state in the battery heating mode of the thermal management system according to an embodiment of the present invention.
7 is a configuration diagram showing an operating state in the mild (Mild) heating mode of the heat management system according to an embodiment of the present invention.
8 is a block diagram showing the operating state in the dehumidification heating mode of the heat management system according to an embodiment of the present invention.
9 is a block diagram showing another embodiment of the cooling water circulation line according to the present invention.
10 and 11 are conceptual diagrams showing the flow of coolant in the coolant circulation line according to opening and closing of the shutoff valve in FIG. 9.
12 is a block diagram showing that the refrigerant heat exchanger and the accumulator according to the present invention are integrally formed.

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

1 is a block diagram showing a thermal management system according to an embodiment of the present invention.

Referring to Figure 1, the thermal management system of the present invention can be largely composed of a refrigerant circulation line 200 for cooling the room by circulating the refrigerant and a cooling water circulation line 300 for cooling the room and cooling the parts by cooling water circulation. have. In addition, the cooling water circulation line 300 may include a heating line 301 for indoor heating and a cooling line 302 for cooling the electric components 460 and the battery 350.

The refrigerant circulation line 200 includes a compressor 210, a water-cooled condenser 220, a first expansion valve 225, an air-cooled condenser 230, a refrigerant branch 241, a second expansion valve 240, and an evaporator 242 ), A refrigerant heat exchanger 233, an accumulator 260, a third expansion valve 251 and a chiller 252.

The compressor 210 may be an electric compressor driven by receiving electric power, and serves to suck and compress the refrigerant and discharge it toward the water-cooled condenser 220.

The water-cooled condenser 220 serves to heat the refrigerant discharged from the compressor 210 with cooling water and condense it into a liquid refrigerant to send it to the first expansion valve 225.

The first expansion valve 225 may serve to throttle or bypass the refrigerant or to block the flow of the refrigerant, and may be disposed behind the water-cooled condenser 220 in the flow direction of the refrigerant.

The air-cooled condenser 230 functions as a condenser or an evaporator, and the function of the air-cooled condenser 230 may be changed according to the role of the first expansion valve 225. That is, when the refrigerant circulation line 200 is used as an air conditioner loop, the first expansion valve 225 is completely opened to pass the refrigerant, and the air-cooled condenser 230 serves as a condenser together with the water-cooled condenser 220, and the refrigerant When the circulation line 200 is used as a heat pump loop, the first expansion valve 225 throttles the refrigerant, and the air-cooled condenser 230 serves as an evaporator. In addition, the air-cooled condenser 230 may be cooled or heated air-cooled by external air.

The refrigerant branch 241 may be formed on the rear side of the air-cooled condenser 230 in the flow direction of the refrigerant, branched into two lines in the refrigerant branch 241, and one line is connected to the evaporator 242 The other line may be configured to be connected to the chiller 252.

The second expansion valve 240 and the third expansion valve 251 may serve to throttle or pass the refrigerant or to block the flow of the refrigerant. And the second expansion valve 240 and the third expansion valve 251 may be configured in parallel. That is, the refrigerant line is branched from the cold distribution branch 241 into two lines, a second expansion valve 240 is disposed on one of the two branched refrigerant lines, and a third expansion is performed on the other refrigerant line. The valve 251 may be disposed. At this time, the second expansion valve 240 may be disposed in front of the evaporator 242, and the third expansion valve 251 may be disposed in front of the chiller 252.

The evaporator 242 is disposed at the rear of the second expansion valve 240 in the flow direction of the refrigerant, and is provided inside the air conditioner 150 of the vehicle, and the air flowing by the blower 152 of the air conditioner is evaporator 242 ) And cooled to be supplied to the vehicle interior to be used for indoor cooling of the vehicle.

The refrigerant heat exchanger 233 serves to improve cooling performance by exchanging heat between the refrigerant flowing into the second expansion valve 240 and the refrigerant discharged from the evaporator 242. Here, the refrigerant heat exchanger 233 passes through the refrigerant line flowing into the evaporator 242 connecting the refrigerant branch 241 and the second expansion valve 240, and the evaporator 242 and the accumulator ( In the evaporator 242 connecting 260, the discharge side refrigerant line through which the refrigerant is discharged passes, and heat exchange between refrigerants passing through the inlet side refrigerant line and the discharge side refrigerant line may occur. Thus, the refrigerant may be further cooled before being introduced into the second expansion valve 240 by the refrigerant heat exchanger 233, and the cooling performance through the evaporator 242 may be improved and the efficiency of the cooling system may be improved.

In particular, the refrigerant heat exchanger 233 is connected to the air-cooled condenser 230 and the chiller 252 in parallel. That is, the refrigerant heat exchanger 233 is not disposed in series in the refrigerant line between the air-cooled condenser 230 and the chiller 252, but is disposed adjacent to the evaporator 242, so that the refrigerant heat exchanger 233 and the evaporator 242 are It can be arranged in series and connected. If the refrigerant heat exchanger 233 is disposed in series between the air-cooled condenser 230 and the chiller 252, heating performance may be reduced by acting as a pressure drop on the low pressure side in the heating mode. Conversely, when the refrigerant heat exchanger 233 is connected in parallel, the cooling performance as well as the heating performance are increased, which is a refrigerant heat exchanger 233 between the condensers 220 and 230 and the chiller 252 in the refrigerant flow in the heating mode. Because there is no.

The chiller 252 is disposed at the rear of the third expansion valve 251 in the flow direction of the refrigerant, and the cooling water may be cooled by heat exchange with the cooling water. Thus, the second expansion valve 240 and the evaporator 242 form one set, and the third expansion valve 251 and the chiller 252 form another set, and the two sets are configured in parallel on the refrigerant line. In addition, a refrigerant line may be formed as a single refrigerant line by joining a refrigerant line at the rear side of the evaporator 242 and the chiller 252 in the refrigerant flow direction.

In addition, the accumulator 260 may separate the liquid refrigerant and the gaseous refrigerant among the refrigerants and supply only the gaseous refrigerant to the compressor 210. Here, the accumulator 260 is disposed and connected to the point where the rear side of the evaporator 242 and the refrigerant line of the rear side of the chiller 252 are joined, and the accumulator 260 is in front of the compressor 210 in the refrigerant flow direction. Can be deployed.

The heating line 301 may include a water-cooled condenser 220, a first coolant pump 450, a coolant heater 430, a heater core 440, and a first direction change valve 410.

As described above, the water-cooled condensers 220 may exchange heat with each other while the refrigerant and the cooling water pass.

The first cooling water pump 450 is a means for pushing the cooling water to circulate the cooling water along the heating line 301, and the first cooling water pump 450 is disposed at the rear of the water-cooled condenser 220 in the flow direction of the cooling water to cool the water. Can be installed on line.

The cooling water heater 430 is a device that heats the cooling water, and may be connected to the rear of the first cooling water pump 450 and in front of the heater core 440 in the flow direction of the cooling water. In addition, the cooling water heater 430 may be operated when the temperature of the cooling water is below a specific temperature, and may be variously formed, such as an induction heater, a seed heater, a PTC heater, and a film heater capable of generating heat using electric power.

The heater core 440 may be disposed in the air conditioning unit 150 of the vehicle, and the air flowing by the blower 152 is heated through the heater core 440 and supplied to the vehicle interior to be used for indoor heating of the vehicle. Can be. In addition, the heater core 440 may be disposed and connected to the rear of the cooling water heater 430 in the flow direction of the cooling water.

The first direction switching valve 410 may be installed between the heater core 440 and the water-cooled condenser 220, and selectively connect or connect the heating line 301 and the cooling line 302 to be described later. It can be configured to block. More specifically, the first direction switching valve 410 is installed on the heating line 301, and two cooling water line pipes are connected to the first direction switching valve 410, and branched from one side of the cooling line 302. One first connection line 302-1 is connected to the first direction change valve 410, and one second connection line 302-2 branched from the other side of the cooling line 302 is a first direction change valve. It can be connected to 410. That is, in the first direction change valve 410, four cooling water lines are connected to meet each other, and the first direction change valve 410 is a four direction change direction in which four coolant lines are connected to each other or can control a blocked state. It can be a valve.

The cooling line 302 includes an electric radiator 310, a reservoir tank 370, a second direction change valve 320, a second coolant pump 420, a first direction change valve 410, and an electric component 460 , A first coolant joint 313, a second coolant joint 312, a third coolant pump 340, a battery 350, a chiller 252, and a third direction change valve 330.

The electric radiator 310 is a radiator for cooling the cooling water heat exchanged with the electric component 460 or the battery 350, and the electric radiator 310 may be cooled by air cooling by a cooling fan 311.

The reservoir tank 370 may serve to store cooling water and replenish insufficient cooling water on the cooling water line, and the reservoir tank 370 includes a second cooling water pump 420 and a third cooling water pump 340 in the flow direction of the cooling water. ) It can be installed on the front cooling water line.

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

The second cooling water pump 420 is a means for feeding the cooling water to circulate the cooling water along the cooling line 302. And the second cooling water pump 420 is installed on the first connection line 302-1 between the first direction switching valve 410 and the second direction switching valve 320, the second cooling water pump 420 Cooling water may flow from the second direction switching valve 320 toward the first direction switching valve 410 by operation.

The first direction switching valve 410 is as described in the heating line 301 described above.

The electric component 460 is disposed on the second connection line 302-2 connecting the first direction switching valve 410 and the second coolant joint 312, so that the electric component 460 is cooled by the coolant. You can. In addition, the electric component 460 may be a driving motor, an inverter, an On Board Charger (OBC), or the like.

The third cooling water pump 340 is a means for feeding the cooling water to circulate the cooling water along the cooling line 302. In addition, the third coolant pump 340 is installed in the coolant line between the first coolant joint 313 and the battery 350, so that the coolant flows from the third coolant pump 340 toward the battery 350.

The battery 350 is a power source for a vehicle, and may be a driving source for various electric components 460 in the vehicle. Alternatively, the battery 350 may be connected to the fuel cell to store electricity, or may serve to store electricity supplied from the outside. In addition, the battery 350 may be disposed on a cooling water line between the third cooling water pump 340 and the third direction switching valve 330. Thus, the battery 350 may be cooled or heated by heat exchange with the flowing cooling water.

The first coolant joint 313 is installed in the coolant line at the rear of the second direction switching valve 320 in the flow direction of the coolant, and the first coolant joint 313 is connected to meet three coolant lines. That is, the first coolant joint 313 is installed so that both sides are connected on the cooling line 302, and the third connection line 302-3 may be connected to the lower side. Here, the third connection line 302-3 may be connected to pass through the chiller 252.

The second coolant joint 312 may be installed at a point where the rear end of the second connection line 302-2 meets the cooling line 302 and is connected so that three coolant lines meet at the second coolant joint 312. do. That is, the second coolant joint 312 is installed so that both sides are connected on the cooling line 302, and the second connection line 302-2 may be connected to the upper side.

The chiller 252 is as described in the heating line 301 described above.

The third direction switching valve 330 is installed on the cooling water line between the battery 350 and the second coolant joint 312, and two cooling water pipes are connected to the third direction switching valve 330, and the third direction The third connection line 302-3 may be connected to the upper side of the switching valve 330 so that the battery 350 and the third connection line 302-3 are connected in parallel. At this time, the second direction switching valve 320 may be a three-way direction switching valve capable of adjusting a state in which three cooling water lines are connected to or blocked from each other.

In addition, the air conditioning device 150 is provided with a blower 152 on one side to blow air, and a temperature control door 151 may be installed inside the air conditioning device 150. In addition, the evaporator 242 and the heater core 440 disposed in the air conditioning device allow air discharged from the blower 152 to flow into the room after only the evaporator 242 according to the operation of the temperature control door 151, After passing through the evaporator 242, the heater core 440 may be disposed and configured to be introduced into the room.

Thus, the heat management system of the present invention can minimize the pressure drop of the refrigerant in the heat pump mode, thereby increasing the pressure of the refrigerant flowing into the compressor, thereby improving the performance of the heat pump and improving the efficiency of the system.

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

1. In maximum cooling mode

2 is a configuration diagram showing an operating state in the maximum cooling mode of the heat management system according to an embodiment of the present invention.

Referring to FIG. 2, the refrigerant 210 is operated in the refrigerant circulation line 200 to discharge high temperature and high pressure refrigerant from the compressor 210. In addition, the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the water-cooled condenser 220. Subsequently, the refrigerant cooled in the water-cooled condenser 220 passes through the first expansion valve 225 in a state that is completely open toward the air-cooled condenser 230 and flows into the air-cooled condenser 230, and the refrigerant is external from the air-cooled condenser 230. It is cooled by heat exchange with air. That is, the water-cooled condenser 220 and the air-cooled condenser 230 both serve as condensers to condense the refrigerant. The condensed refrigerant is then branched from the refrigerant branch 241, and a part of the refrigerant passes through the refrigerant heat exchanger 233, is throttled while passing through the second expansion valve 240, and the refrigerant expands. While passing through the evaporator 242, heat is exchanged with air blown by the blower 152 of the air conditioner 150 to cool the air as the refrigerant evaporates, and the cooled air is supplied to the vehicle interior to provide indoor cooling. Then, the refrigerant evaporated from the evaporator 242 passes through the refrigerant heat exchanger 233 and heat exchanges with the refrigerant before flowing into the second expansion valve 240 and then flows back into the compressor 210 through the accumulator 260. In addition, the remainder of the refrigerant branched from the refrigerant branch 241 is throttled while passing through the third expansion valve 240 to expand the refrigerant, and the expanded refrigerant is then exchanged with cooling water while passing through the chiller 252 to cool the refrigerant. Cooling water can be cooled while evaporating. And the refrigerant evaporated from the chiller 252 flows back through the accumulator 260 to the compressor 210. As such, the refrigerant that has passed through the evaporator 242 and the refrigerant that has passed through the chiller 252 are joined by the accumulator 260 and flows into the compressor 210, and the refrigerant is circulated while repeating the above-described process.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450, the second cooling water pump 420, and the third cooling water pump 340. And the refrigerant passing through the water-cooled condenser 220, the electric component 460 and the battery 350 may be cooled by the cooling water, and the heated cooling water is operated by the cooling fan 311 in the radiator 310 for electric equipment. It can be cooled by heat exchange with external air. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction connecting the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the left side, so that the cooling water flows, and the lower side and the right side may be connected to each other, thereby allowing the cooling water to flow. In addition, the second direction switching valve 320 may be connected to the left side and the bottom side so that cooling water flows and the right side is disconnected. In addition, the third direction switching valve 330 may be connected to the upper side and the right side, and the left side may be blocked.

Thus, the cooling water from the radiator 310 for the electric field, the reservoir tank 370, the second direction switching valve 320, the second cooling water pump 420, the first direction switching valve 410, the water-cooled condenser 220, the first The coolant pump 450, the coolant heater 430, the heater core 440, the first direction change valve 410, the electric components 460, and the second coolant joint 312 in turn, and then again the radiator 310 for electric equipment ), And cycles are repeated. Here, the cooling water does not flow from the second direction switching valve 320 to the first coolant joint 313 by the second direction switching valve 320, and the third direction switching valve by the third direction switching valve 330 Coolant may not flow from 330 to the second coolant joint 312. In addition, the coolant flows back from the chiller 252 to the chiller 252 through the first coolant joint 313, the third coolant pump 340, the battery 350, and the third direction switching valve 330 in this order. The cycle that is cycled is repeated. That is, the battery 350 and the chiller 252 are formed with separate closed loops through which cooling water is circulated by the second direction switching valve 320 and the third direction switching valve 330, so that the battery 350 is formed. It can be cooled separately.

Here, the maximum cooling mode may be operated when the temperature of the external air is in the range of 30 degrees to 45 degrees Celsius, and the compressor 210 may be rotated at the maximum rotational speed. In addition, when the cooling of the battery 350 is unnecessary, the third expansion valve 251 may be blocked so that refrigerant does not flow toward the chiller 252, and the third cooling water pump 340 may not operate.

2. Mild cooling mode

3 is a configuration diagram showing an operating state in a mild cooling mode of a heat management system according to an embodiment of the present invention.

Referring to FIG. 3, in the refrigerant circulation line 200, the compressor 210 operates to discharge high-temperature and high-pressure refrigerant from the compressor 210. In addition, the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the water-cooled condenser 220. Subsequently, the refrigerant cooled in the water-cooled condenser 220 passes through the first expansion valve 225 in a state that is completely open toward the air-cooled condenser 230 and flows into the air-cooled condenser 230, and the refrigerant is external from the air-cooled condenser 230. It is cooled by heat exchange with air. That is, the water-cooled condenser 220 and the air-cooled condenser 230 both serve as condensers to condense the refrigerant. The condensed refrigerant passes through the refrigerant branch 241, passes through the refrigerant heat exchanger 233, is throttled while passing through the second expansion valve 240, and the refrigerant expands, and the expanded refrigerant then uses the evaporator 242. As it passes through, heat is exchanged with air blown by the blower 152 of the air conditioning apparatus 150 to cool the air as the refrigerant evaporates, and the cooled air is supplied to the vehicle interior to provide indoor cooling. Then, the refrigerant evaporated from the evaporator 242 passes through the refrigerant heat exchanger 233 and heat exchanges with the refrigerant before flowing into the second expansion valve 240 and then flows back into the compressor 210 through the accumulator 260. At this time, the third expansion valve 251 is blocked so that the refrigerant may not flow to the chiller 252.

Thus, the refrigerant passes through the evaporator 242, the refrigerant flows into the compressor 210 through the accumulator 260, and the refrigerant is circulated while repeating the above process.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450, the second cooling water pump 420, and the third cooling water pump 340. And the refrigerant passing through the water-cooled condenser 220, the electric component 460 and the battery 350 may be cooled by the cooling water, and the heated cooling water is operated by the cooling fan 311 in the radiator 310 for electric equipment. It can be cooled by heat exchange with external air. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction connecting the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the left side, so that the cooling water flows, and the lower side and the right side may be connected to each other, thereby allowing the cooling water to flow. In addition, the second direction switching valve 320 may be connected to the left, lower, and right sides in the three directions, thereby allowing cooling water to flow therethrough. In addition, the third direction switching valve 330 may be connected to the left and right sides and the upper side may be blocked.

Thus, the cooling water from the radiator 310 for the electric field, the reservoir tank 370, the second direction switching valve 320, the second cooling water pump 420, the first direction switching valve 410, the water-cooled condenser 220, the first The coolant pump 450, the coolant heater 430, the heater core 440, the first direction change valve 410, the electric components 460, and the second coolant joint 312 in turn, and then again the radiator 310 for electric equipment ), And cycles are repeated. Here, a part of the cooling water flows to the right by the second direction switching valve 320, so that the first coolant joint 313, the third coolant pump 340, the battery 350, and the third direction switching valve 330, The cycle through which the second coolant joint 312 flows through the radiator 310 again for circulation is repeated. At this time, the coolant that has passed through the electric component 460 and the coolant that has passed through the battery 350 may be joined at the second coolant joint 312 and introduced into the electric radiator 310.

Here, the mild cooling mode can be operated when the temperature of the outside air is in the range of 15 to 25 degrees Celsius, and the battery can be cooled by the radiator for the battlefield, so that the refrigerant does not circulate through the chiller side. There is an advantage that can reduce the power consumed for driving the compressor.

3. In battery-only cooling mode

4 is a configuration diagram showing an operating state in the cooling mode dedicated to the battery of the thermal management system according to an embodiment of the present invention.

Referring to FIG. 4, in the refrigerant circulation line 200, the compressor 210 operates to discharge high-temperature and high-pressure refrigerant from the compressor 210. In addition, the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the water-cooled condenser 220. Subsequently, the refrigerant cooled in the water-cooled condenser 220 passes through the first expansion valve 225 in a state that is completely open toward the air-cooled condenser 230 and flows into the air-cooled condenser 230, and the refrigerant is external from the air-cooled condenser 230. It is cooled by heat exchange with air. That is, the water-cooled condenser 220 and the air-cooled condenser 230 both serve as condensers to condense the refrigerant. The condensed refrigerant passes through the refrigerant branch 241, passes through the refrigerant heat exchanger 233, is throttled while passing through the third expansion valve 251 to expand the refrigerant, and the expanded refrigerant then uses the chiller 252. Cooling water is cooled as the refrigerant evaporates through heat exchange with the cooling water, and cooling of the battery 350 is performed using the cooled cooling water. Then, the refrigerant evaporated through the chiller 252 flows back through the accumulator 260 to the compressor 210. At this time, the second expansion valve 240 is blocked, the refrigerant may not flow to the evaporator 242. Thus, the refrigerant is circulated while repeating the above process.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450, the second cooling water pump 420, and the third cooling water pump 340. And the refrigerant passing through the water-cooled condenser 220, the electric component 460 and the battery 350 may be cooled by the cooling water, and the heated cooling water is operated by the cooling fan 311 in the radiator 310 for electric equipment. It can be cooled by heat exchange with external air. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction connecting the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the left side, so that the cooling water flows, and the lower side and the right side may be connected to each other, thereby allowing the cooling water to flow. In addition, the second direction switching valve 320 may be connected to the left side and the bottom side so that cooling water flows and the right side is disconnected. In addition, the third direction switching valve 330 may be connected to the upper side and the right side, and the left side may be blocked.

Thus, the cooling water from the radiator 310 for the electric field, the reservoir tank 370, the second direction switching valve 320, the second cooling water pump 420, the first direction switching valve 410, the water-cooled condenser 220, the first The coolant pump 450, the coolant heater 430, the heater core 440, the first direction change valve 410, the electric components 460, and the second coolant joint 312 in turn, and then again the radiator 310 for electric equipment ), And cycles are repeated. Here, the cooling water does not flow from the second direction switching valve 320 to the first coolant joint 313 by the second direction switching valve 320, and the third direction switching valve by the third direction switching valve 330 Coolant may not flow from 330 to the second coolant joint 312. In addition, the coolant flows back from the chiller 252 to the chiller 252 through the first coolant joint 313, the third coolant pump 340, the battery 350, and the third direction switching valve 330 in this order. The cycle that is cycled is repeated. That is, the battery 350 and the chiller 252 are formed with separate closed loops through which cooling water is circulated by the second direction switching valve 320 and the third direction switching valve 330, so that the battery 350 is formed. It can be cooled separately.

Here, the battery-only cooling mode may be operated when fast charging of the battery is required without cooling the room. At this time, the compressor 210 may be rotated at the maximum rotational speed.

4. In the maximum heating mode

5 is a configuration diagram showing the operating state in the maximum heating mode of the heat management system according to an embodiment of the present invention.

Referring to FIG. 5, in the refrigerant circulation line 200, the compressor 210 operates to discharge high-temperature and high-pressure refrigerant from the compressor 210. In addition, the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the water-cooled condenser 220. Subsequently, the refrigerant cooled in the water-cooled condenser 220 is throttled while passing through the first expansion valve 225 to expand the refrigerant, and the expanded refrigerant exchanges heat with external air while passing through the air-cooled condenser 230 to evaporate the refrigerant while external It absorbs the heat of the air. Subsequently, the refrigerant passes through the refrigerant branch 241 and passes through the third expansion valve 251 in a fully opened state, and enters the chiller 252. In the chiller 252, the refrigerant and the coolant exchange heat to cool the refrigerant. have. The refrigerant that has passed through the chiller 252 then flows back into the compressor 210 through the accumulator 260. At this time, the second expansion valve 240 is blocked, the refrigerant may not flow to the evaporator 242. Thus, the refrigerant is circulated while repeating the above process.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450 and the second cooling water pump 420. In addition, the cooling water may be heated while passing through the water-cooled condenser 220, heated by the cooling water heater 430, and heated by waste heat of the electric component 460, and may be cooled while passing through the chiller 252. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction to separate the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the right side, so that the cooling water flows, and the lower side and the left side may be connected to each other, so that the cooling water flows. In addition, the second direction switching valve 320 may be connected to the right side and the bottom side, so that coolant flows and the left side may be disconnected. In addition, the third direction switching valve 330 may be connected to the upper side and the left side and the right side may be blocked.

Thus, the cooling water of the heating line 301 passes through the first cooling water pump 450, the cooling water heater 430, the heater core 440, the first direction switching valve 410, and the water cooling type condenser 220 in order. The cycle in which the coolant pump 450 is introduced and circulated is repeated. And the cooling water of the cooling line 302 separated from the heating line 301 is from the second cooling water pump 420 to the first direction switching valve 410, the electric components 460, the second cooling water joint 312, the third The cycle in which the direction change valve 330, the chiller 252, the first coolant joint 313, and the second direction change valve 320 is sequentially introduced into the second coolant pump 420 and then cycled is repeated. Here, the cooling water may not flow from the second direction switching valve 320 to the second cooling water joint 312 through the electric radiator 310 by the second direction switching valve 320, and the third direction switching valve Coolant may not flow from the third direction switching valve 330 to the first coolant joint 313 through the battery 350 and the third coolant pump 340 by 330. In addition, the cooling water passes through the heater core 440 and heats with air blown by the air blower 152 of the air conditioning apparatus 150 to heat the air, and the heated air is supplied to the vehicle interior to perform indoor heating.

In addition, the heat management system according to the present invention is configured separately from the heating line 301 and may further include an air-heated heater 470 that directly heats the air entering the room to heat the room. That is, the air-heated heater 470 may be provided in proximity to the heater core 440, and the air-heated heater 470 may be formed of, for example, a PTC heater that is electrically operated to rapidly heat air. Thus, it is possible to increase the fast-acting speed of the indoor heating. At this time, since the coolant preheated by the coolant heater 430 flows into the heater core 440, the air-heated heater 470 may use a low-voltage PTC heater having a relatively small heat generation capacity, and accordingly, a high-voltage PTC. It can be configured at a lower price than the heater. Alternatively, although not shown, when the air-heated heater 470 is provided close to the heater core 440, the coolant heater 430 is not connected to the heating line 301 but to the cooling line 302 close to the battery 350. Can be installed. Thus, an air-heated heater is used for heating and a cooling water heater is separately applied to increase the temperature of the battery, thereby increasing efficiency and separately controlling the battery.

Here, the maximum heating mode can be operated when the temperature of the external air is in the range of ?? 20 degrees to ?? 5 degrees Celsius, and the third direction switching valve 330 and the third cooling water pump 340 are controlled to control the battery. It is also possible to cool the 350.

5. In battery heating mode

6 is a configuration diagram showing an operating state in the battery heating mode of the thermal management system according to an embodiment of the present invention.

Referring to FIG. 6, the refrigerant circulation line 200 does not operate and thus the refrigerant is not circulated.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450, the second cooling water pump 420, and the third cooling water pump 340. In addition, the cooling water may be heated by waste heat of the cooling water heater 430 and the electric component 460. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction connecting the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the left side, so that the cooling water flows, and the lower side and the right side may be connected to each other, thereby allowing the cooling water to flow. In addition, the second direction switching valve 320 may be connected to the right side and the bottom side, so that coolant flows and the left side may be disconnected. In addition, the third direction switching valve 330 may be connected to both the left side and the upper side and the right side.

Thus, the cooling water from the second cooling water pump 420, the first direction switching valve 410, the water-cooled condenser 220, the first cooling water pump 450, the cooling water heater 430, the heater core 440, the first direction switching Valve 410, electrical components 460, the second coolant joint 312, the third direction switching valve 330, the chiller 252, the first coolant joint 313, the second direction switching valve 320 The cycle through which the second coolant pump 420 flows through in turn is repeated. At this time, the cooling water passing through the battery 350 may be joined by the third direction switching valve 330 and flowed upward, and then branched to both sides of the first cooling water joint 313. Here, the cooling water may not flow from the second direction switching valve 320 by the second direction switching valve 320 to the second cooling water joint 312 through the electric radiator 310. Thus, the heated cooling water may heat up the battery 350 to rapidly improve the initial performance of the battery 350 in the winter when the ambient temperature is low.

Here, the battery heating mode may be operated when the temperature of the outside air is in the range of ?? 20 degrees to ?? 5 degrees Celsius.

6. Mild heating mode

7 is a configuration diagram showing an operating state in the mild (Mild) heating mode of the heat management system according to an embodiment of the present invention.

Referring to FIG. 7, the refrigerant circulation line 200 does not operate and thus the refrigerant is not circulated.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450 and the second cooling water pump 420. In addition, the cooling water may be heated only by waste heat of the electric component 460. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction connecting the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the left side, so that the cooling water flows, and the lower side and the right side may be connected to each other, thereby allowing the cooling water to flow. In addition, the second direction switching valve 320 may be connected to the right side and the bottom side, so that coolant flows and the left side may be disconnected. In addition, the third direction switching valve 330 may be connected to the left side and the upper side, and the right side may be blocked.

Thus, the cooling water from the second cooling water pump 420, the first direction switching valve 410, the water-cooled condenser 220, the first cooling water pump 450, the cooling water heater 430, the heater core 440, the first direction switching Valve 410, electrical components 460, the second coolant joint 312, the third direction switching valve 330, the chiller 252, the first coolant joint 313, the second direction switching valve 320 The cycle through which the second coolant pump 420 flows through in turn is repeated. At this time, the cooling water may not flow from the third direction switching valve 312 to the battery 350, the third cooling water pump 340, and the first cooling water joint 313 by the third direction switching valve 330, Cooling water may not flow from the second direction switching valve 320 to the second coolant joint 312 through the electric radiator 310 by the second direction switching valve 320. Thus, when the heating demand is low, only the waste heat of the electric component 460 can be used to heat the cooling water and use it for indoor heating.

Here, the mild heating mode can be operated when the temperature of the outside air is in the range of 5 to 15 degrees Celsius.

7. In dehumidification heating mode

8 is a block diagram showing the operating state in the dehumidification heating mode of the heat management system according to an embodiment of the present invention.

Referring to FIG. 8, in the refrigerant circulation line 200, the compressor 210 operates to discharge high-temperature and high-pressure refrigerant from the compressor 210. In addition, the refrigerant discharged from the compressor 210 is cooled by heat exchange with cooling water in the water-cooled condenser 220. Subsequently, the refrigerant cooled in the water-cooled condenser 220 is throttled while passing through the first expansion valve 225, so that the refrigerant expands. Is bypassed the second expansion valve 240 after passing through the refrigerant heat exchanger 233, and then the refrigerant exchanges heat with air blown by the blower 152 of the air conditioning apparatus 150 while passing through the evaporator 242. As it is, moisture in the air is removed. Then, the refrigerant that has passed through the evaporator 242 passes through the refrigerant heat exchanger 233 and flows back through the accumulator 260 to the compressor 210. In addition, the rest of the refrigerant branched from the refrigerant branch 241 bypasses the third expansion valve 240, and then the refrigerant passes through the chiller 252 and then joins at the accumulator 260 to the compressor 210. After the introduction, the refrigerant is circulated while repeating the above process.

Meanwhile, the cooling water in the cooling water circulation line 200 is circulated by the operation of the first cooling water pump 450 and the second cooling water pump 420. In addition, the cooling water may be heated only by waste heat of the electric component 460. At this time, the first direction switching valve 410 and the second direction switching valve 320 may be adjusted in a direction to separate the heating line 301 and the cooling line 302. In more detail, the first direction switching valve 410 may be connected to the upper side and the right side, so that the cooling water flows, and the lower side and the left side may be connected to each other, so that the cooling water flows. In addition, the second direction switching valve 320 may be connected to the right side and the bottom side, so that coolant flows and the left side may be disconnected. In addition, the third direction switching valve 330 may be connected to the left side and the upper side, and the right side may be blocked.

Thus, the cooling water of the heating line 301 passes through the first cooling water pump 450, the cooling water heater 430, the heater core 440, the first direction switching valve 410, and the water cooling type condenser 220 in order. The cycle in which the coolant pump 450 is introduced and circulated is repeated. And the cooling water of the cooling line 302 separated from the heating line 301 is from the second cooling water pump 420 to the first direction switching valve 410, the electric components 460, the second cooling water joint 312, the third The cycle in which the direction change valve 330, the chiller 252, the first coolant joint 313, and the second direction change valve 320 is sequentially introduced into the second coolant pump 420 and then cycled is repeated. At this time, the cooling water may not flow from the third direction switching valve 312 to the battery 350, the third cooling water pump 340, and the first cooling water joint 313 by the third direction switching valve 330, Cooling water may not flow from the second direction switching valve 320 to the second coolant joint 312 through the electric radiator 310 by the second direction switching valve 320. Here, the cooling water heater 430 may not operate, and air dehumidified while passing through the evaporator 242 may be heated while passing through the heater core 440 and used for indoor heating.

Here, the dehumidification heating mode can be operated when the temperature of the outside air is in the range of 5 to 15 degrees Celsius.

9 is a configuration diagram showing a heat management system according to another embodiment of the present invention, and FIGS. 10 and 11 are conceptual diagrams showing the flow of cooling water in the cooling water circulation line according to opening and closing of the shutoff valve in FIG. 9.

Referring to FIG. 9, the cooling line 302 may further include a fourth connection line 302-4 connecting the first connection line 302-1 and the second connection line 302-2, A shutoff valve 360 is installed on the fourth connection line 302-4 so that the shutoff valve 360 can be arranged in parallel with the first direction switching valve 410.

Thus, normally, the shutoff valve 360 is blocked as shown in FIG. 10 to cool the electric components 460 using the flow of cooling water, and when the cooling demand for the electric components 460 is high, the shutoff valve is illustrated in FIG. 11. Opening 360 may cool the electric component 460 using cooler cooling water.

In addition, a cooling water temperature sensor 461 may be installed near the front of the electric component 460 in the flow direction of the cooling water, and the shutoff valve 360 may be adjusted according to the temperature of the cooling water measured through the cooling water temperature sensor 461. Cooling of the electric component 460 may be controlled by controlling the opening and closing of the electronic components.

12 is a block diagram showing that the refrigerant heat exchanger and the accumulator according to the present invention are integrally formed.

Referring to FIG. 12, the refrigerant heat exchanger 233 and the accumulator 260 may be integrally formed. At this time, the high pressure side through which the refrigerant flows into the refrigerant heat exchanger is formed into a spiral pipe inside the accumulator, and the low pressure side through which the discharged refrigerant flows after passing through the evaporator 242 is configured to flow into the accumulator, so that the refrigerant heat exchanger and the accumulator are integrated. It can be composed of.

The present invention is not limited to the above-described embodiments, and of course, the scope of application is diverse, and anyone who has ordinary knowledge in the field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Of course, various modifications are possible.

150: air conditioning unit 151: temperature control door
152: blower
200: refrigerant circulation line 210: compressor
220: water-cooled condenser 225: first expansion valve
230: air-cooled condenser 233: refrigerant heat exchanger
240: second expansion valve 241: refrigerant branch
242: evaporator 251: third expansion valve
252: chiller 260: accumulator
300: cooling water circulation line 301: heating line
302: Cooling line 302-1: First connection line
302-2: Second connection line 302-3: Third connection line
310: battlefield radiator 311: cooling fan
312: second coolant joint 313: first coolant joint
320: second direction switching valve 330: third direction switching valve
340: third cooling water pump 350: battery
360: shutoff valve 370: reservoir tank
410: first direction switching valve 420: second cooling water pump
430: coolant heater 440: heater core
450: first cooling water pump 460: electrical components
461: cooling water temperature sensor 470: air heating heater

Claims (18)

A compressor 210, a water-cooled condenser 220, a first expansion valve 225, an air-cooled condenser 230, a third expansion valve 251, and a chiller 252 are sequentially connected to coolant closed loop for circulating refrigerant, It is disposed between the air-cooled condenser 230 and the third expansion valve 251 and between the chiller 252 and the compressor 210 to distribute the refrigerant, and includes a second expansion valve 225 and an evaporator 242 Refrigerant circulation line comprising a refrigerant heat exchanger (233) disposed in the cooling line and heat exchanged between the refrigerant flowing into the second expansion valve (225) and the refrigerant discharged from the evaporator (242) ( 200);
A heating line 301 for heating the room by circulating the cooling water; And
A cooling line 302 for circulating air or the cooling water to cool the battery 350 and the electric component 460;
Thermal management system comprising a.
According to claim 1,
The refrigerant heat exchanger 233 exchanges heat with the refrigerant flowing into the second expansion valve 240 and the refrigerant discharged from the evaporator 242 in the cooling mode, and to the second expansion valve 240 in the heating mode. A heat management system characterized in that the refrigerant flowing in and the refrigerant discharged from the evaporator 242 are not exchanged.
According to claim 1,
The cooling line 302,
A first connection line 302-1 branched from one side of the cooling line 302 and connected to the heating line 301; And a second connection line 302-2 branched from the other side of the cooling line 302 and connected to the heating line 301.
According to claim 3,
The first connection line 302-1, the second connection line 302-2, and the heating line 301 are connected to the first direction change valve 410, and are provided by the first direction change valve 410. Cooling line 302 and the heating line 301 is connected to each other or heat management system characterized in that the connection is blocked.
According to claim 4,
The electric component 460 is a thermal management system, characterized in that disposed on the second connection line (302-2).
The method of claim 5,
The cooling line 302,
A fourth connection line 302-4 connecting the first connection line 302-1 and the second connection line 302-2, and a first connection line installed on the fourth connection line 302-4 A heat management system further comprising a shut-off valve (360) disposed in parallel with the directional valve (410).
The method of claim 6,
The cooling line 302,
A heat management system further comprising a cooling water temperature sensor 461 installed in front of the electric component 460 in the flow direction of the cooling water.
According to claim 1,
The refrigerant heat exchanger 233 is a heat management system, characterized in that connected to the air-cooled condenser 230 and the chiller 252 in parallel.
According to claim 1,
The refrigerant heat exchanger (233) is a heat management system, characterized in that connected to the evaporator (242) in series.
According to claim 1,
The cooling line 302,
It is connected in parallel with the battery 350 and includes a third connection line 302-3 passing through the chiller 252, and the third connection line 302-3 is connected to the third direction switching valve 330. It is connected to the cooling line 302, the heat management system, characterized in that the cooling water flows or flow is blocked in the third connection line 302-3 by the third direction switching valve 330.
According to claim 1,
A thermal management system further comprising an accumulator 260 disposed and connected between the evaporator 242 and the compressor 210.
The method of claim 11,
The refrigerant heat exchanger 233 and the accumulator 260 is a thermal management system, characterized in that formed integrally.
According to claim 1,
The cooling line 302,
Heat management system, characterized in that it comprises a radiator 310 for the electric field for cooling the cooling water with air.
According to claim 1,
The heating line 301,
A heater core 440 that heats 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 flowing into the room, and the heater core 440 in the flow direction of the coolant. A heat management system including a cooling water heater 430 disposed in the front to heat the cooling water.
According to claim 1,
The heating line 301 includes a heater core 440 that heats the room using heated air by heat-exchanging coolant heat exchanged with refrigerant through the water-cooled condenser 220 and air entering the room,
The heating management system further comprises an air-heating heater 470 configured to be separate from the heating line 301 and directly heating air entering the room to heat the room.
According to claim 1,
In mild cooling mode,
The third expansion valve 251 is blocked heat management system, characterized in that the refrigerant does not pass through the chiller (252).
According to claim 1,
In battery heating mode,
The refrigerant circulation line 200 is a heat management system, characterized in that the refrigerant is not circulated.
According to claim 1,
In mild heating mode,
The refrigerant circulation line 200 is a heat management system, characterized in that the refrigerant is not circulated.

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