Heat pump system for vehicle

A heat pump system for a vehicle may include a cooling apparatus including a radiator, a first water pump, a first valve, and a reservoir tank which are connected through a coolant line, and configured to circulate a coolant in the coolant line to cool at least one electrical component provided in the coolant line; a battery cooling apparatus configured to include a battery coolant line connected to the reservoir tank through a second valve, and a second water pump and a battery module which are connected through the battery coolant line to circulate the coolant in the battery module; and a heating apparatus including a heating line connected to the coolant line through a third valve to heat a vehicle interior by use of a coolant and a third water pump provided on the heating line, and a heater.

CROSS-REFERENCE TO RELATED APPLICATION

The present application under 35 U.S.C. 119 claims priority to and the benefit of Korean Patent Application No. 10-2019-0101006 filed in the Korean Intellectual Property Office on Aug. 19, 2019, the entire contents of which is incorporated herein for all purposes by reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a heat pump system for a vehicle. More particularly, the present invention relates to a heat pump system for a vehicle which adjusts a temperature of a battery module by use of one chiller that performs heat exchange between a refrigerant and a coolant and improves heating efficiency by use of waste heat generated from an electrical component.

Description of Related Art

In general, an air conditioner for a vehicle includes an air conditioning system for circulating a coolant to heat or cool an interior of the vehicle.

Such an air conditioner maintains a comfortable indoor environment by maintaining an internal temperature of the vehicle at an appropriate level regardless of an external temperature change, so that the interior of the vehicle is warmed or cooled through heat exchange by a condenser and an evaporator during a process in which a refrigerant discharged by driving of a compressor circulates back to the compressor after passing through a condenser, a receiver dryer, an expansion valve, and an evaporator.

That is, the air conditioner system condenses a gaseous coolant of a high temperature and a high pressure compressed by the compressor in a cooling mode in the summer to reduce a temperature and humidity of the interior of the vehicle through evaporation in the evaporator through the receiver dryer and the expansion valve.

Meanwhile, in recent years, as interest in energy efficiency and environmental pollution has been increasing, there has been a demand for the development of environmentally friendly vehicles configured for substantially replacing internal combustion engine vehicles. The environmentally friendly vehicles are usually fuel cell or electric vehicles driven by electricity or a hybrid vehicle driven by an engine and a battery.

Among the environmentally friendly vehicles, the electric vehicle or the hybrid vehicle does not use a separate heater, unlike an air conditioner of a general vehicle, and the air conditioner applied to the environmentally friendly vehicle is referred to as a heat pump system.

On the other hand, in the case of the electric vehicle, chemical reaction energy of oxygen and hydrogen is converted into electrical energy to generate driving force. In the present process, since thermal energy is generated by the chemical reaction in the fuel cell, effectively removing the generated heat is essential in securing performance of the fuel cell.

Furthermore, even in the hybrid vehicle, a motor is driven by use of the electricity supplied from the fuel cell or an electric battery together with an engine that operates by general fuel to generate the driving force, and as a result, the performance of the motor may be secured only by effectively removing the heat generated from the fuel cell or the battery and the motor.

As a result, in the hybrid vehicle or the electric vehicle generally, a battery cooling system needs to be separately formed with a separate sealing circuit together with a cooler and the heat pump system to prevent the heat generation in the motor and electrical components, and the battery including the fuel cell.

Accordingly, the size and weight of a cooling module mounted in the front of the vehicle increase and a layout of connection pipes that supply the refrigerant and the coolant to the heat pump system, the cooler, and the battery cooling system is complicated in an engine compartment.

Furthermore, the battery cooling system which heats or cools the battery according to a status of the vehicle for the battery to show optimal performance is separately provided, and as a result, multiple valves for connection with the respective connection pipes are adopted and noise and vibration due to frequent opening/closing operations of the valves are transferred to the interior of the vehicle to degrade ride comfort.

BRIEF SUMMARY

Various aspects of the present invention are directed to providing a heat pump system for a vehicle, which adjusts a temperature of a battery module by use of one chiller that performs heat exchange between a refrigerant and a coolant and improves heating efficiency by use of waste heat generated from an electrical component.

Various aspects of the present invention are directed to providing the heat pump system for the vehicle, including: a cooling apparatus configured to include a radiator, a first water pump, a first valve, and a reservoir tank which are connected through a coolant line, and configured to circulate a coolant in the coolant line to cool at least one electrical component provided in the coolant line; a battery cooling apparatus configured to include a battery coolant line connected to the reservoir tank through a second valve, and a second water pump and a battery module which are connected through the battery coolant line to circulate the coolant in the battery module; a heating apparatus including a heating line connected to the coolant line through a third valve to heat a vehicle interior by use of a coolant and a third water pump provided on the heating line, and a heater; and through the second valve, and connected to a refrigerant line of an air conditioner through a refrigerant connection line, to adjust a temperature of the coolant by performing heat exchange between the coolant which is selectively introduced into a connection line connecting the coolant line and the branch line through the first valve, and the branch line and a refrigerant which is selectively supplied from the air conditioner, wherein a condenser included in the air conditioner may be connected to the heating line to pass the coolant circulating through the heating apparatus.

A first end portion of the connection line may be connected to the coolant line through the first valve and a second end portion of the connection line may be connected to the branch line between the second valve and the chiller, and the heater may be provided inside a heating, ventilation, and air conditioning (HVAC) module included in the air conditioner.

When the battery module is heated, the connection line may be open in a state in which the coolant line connected to the radiator is closed through operation of the first valve, the branch line may be open through an operation of the second valve, a portion of the battery coolant line connected to the reservoir tank may be closed based on the branch line, the coolant may circulate along the battery coolant line and the branch line through an operation of the second water pump, in the heating apparatus, the coolant line and the heating line may be connected through operation of the third valve, in the cooling apparatus, the coolant with the temperature increased by waste heat of the electrical component circulates through the heating line through operation of the third water pump, and a heated coolant introduced from the heating line and the coolant line may be flowed into the branch line from the coolant line through the connection line, and is supplied to the battery module connected through the battery coolant line and the branch line.

The air conditioner may include: a heating, ventilation, and air conditioning (HVAC) module configured to include an evaporator which is connected thereto through the refrigerant line and an opening and closing door configured to control outside air passing through the evaporator to be selectively introduced into the heater depending on cooling, heating, and heating/dehumidifying modes of the vehicle therein; the condenser connected to the heating line to circulate a coolant therein to perform heat exchange between the coolant and a refrigerant supplied through the refrigerant line; a compressor connected between the evaporator and the condenser through the refrigerant line; a heat exchanger provided on the refrigerant line between the condenser and the evaporator; a first expansion valve provided in the refrigerant line between the heat exchanger and the evaporator; a second expansion valve provided in the refrigerant connection line; an accumulator provided in the refrigerant line between the evaporator and the compressor and connected to the refrigerant connection line; and a third expansion valve provided in the refrigerant line between the condenser and the heat exchanger.

The heat exchanger may additionally condense or evaporate the refrigerant condensed in the condenser through heat exchange with the outside air depending on a selective operation of the third expansion valve.

The second expansion valve may expand the refrigerant inflowed through the refrigerant connection line to flow to the chiller when cooling the battery module by the refrigerant.

The third expansion valve may selectively expand the refrigerant inflowed to the heat exchanger in a heating mode and a heating/dehumidification mode of the vehicle.

One end portion of the refrigerant connection line may be connected to the refrigerant line between the heat exchanger and the first expansion valve, and the other end portion of the refrigerant connection line may be connected to the accumulator.

The heat exchanger may be mounted on a front of the radiator.

Each of the chiller and the condenser may be a water-cooled heat exchanger, and the heat exchanger may be an air-cooled heat exchanger.

The HVAC module may further include an air heater provided at an opposite side of the evaporator, with the heater interposed between the air heater and the evaporator to selectively heat outside air passing through the heater.

The air heater may be operated to raise a temperature of the outside air passing through the heater when a temperature of a coolant supplied to the heater is lower than a target temperature for interior heating of the vehicle.

When the battery module is cooled in the cooling mode of the vehicle, a coolant may circulate through the coolant line by operation of the first water pump in the cooling apparatus; the connection line may be closed through an operation of the first valve; the branch line may be open through an operation of the second valve, and a coolant passing through the chiller may circulate along the battery coolant line and the branch line through an operation of the second water pump in a state where a portion of the battery coolant line connected to the reservoir tank is closed with respect to the branch line in the battery cooling apparatus; in the heating apparatus, the coolant line and the heating line may be connected through operation of the third valve so that the coolant is supplied from the cooling apparatus, in the air conditioner, in a state that the refrigerant connection line is open through operation of the second expansion valve, the refrigerant may circulate along the refrigerant line and the refrigerant connection line, the first and second expansion valves may expand the refrigerant so that the expanded refrigerant is respectively supplied to the evaporator and the chiller, and the third expansion valve may inflow the refrigerant supplied from the condenser to the heat exchanger.

The heating apparatus may supply the coolant supplied from the cooling apparatus through operation of the third water pump to the condenser, and the condenser may condense the refrigerant through heat exchange with the coolant, and the heat exchanger additionally condenses the refrigerant inflowed from the condenser through heat exchange with the outside air.

When recovering waste heat of an external heat source, the electrical component, and the battery module in a heating mode of the vehicle, the connection line may be open through and operation of the first valve; in the cooling apparatus, on the basis of the connection line, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank may be closed through operation of the first valve V1, and in the instant state, the coolant passing through the electrical component may be supplied to the chiller along the open connection line without passage through the radiator through operation of the first water pump; in the battery cooling apparatus, the branch line and the battery coolant line may be open through operation of the second valve, respectively, and the coolant passing through the battery module may be supplied to the chiller along the branch line through operation of the second water pump; the coolant line and the heating line respectively may form an independent closed circuit through operation of the third valve; in the heating apparatus, the coolant may circulate along the heating line through operation of the third water pump; in the air conditioner, the refrigerant line connecting the condenser and the evaporator may be closed through operation of the first expansion valve; the refrigerant connection line may be open through operation of the second expansion valve; the second expansion valve may expand the refrigerant supplied to the refrigerant connection line to be supplied to the chiller; and the third expansion valve may expand the refrigerant supplied from the condenser to be supplied to the heat exchanger.

In a heating/dehumidification mode of the vehicle, the connection line may be open through an operation of the first valve; in the cooling apparatus, on the basis of the connection line, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank may be closed through operation of the first valve V1, and in the instant state, the coolant passing through the electrical component may be supplied to the chiller along the open connection line without passage through the radiator through operation of the first water pump; in the battery cooling apparatus, the branch line may be open through an operation of the second valve to close the battery coolant line other than a portion of the battery coolant line connected to the reservoir tank with respect to the branch line; the coolant discharged from the chiller may be introduced into the reservoir tank through the branch line and the open the battery coolant line; the coolant line and the heating line respectively may form an independent closed circuit through operation of the third valve; in the heating apparatus, the coolant may circulate along the heating line through operation of the third water pump; in the air conditioner, the refrigerant may be circulated along the refrigerant line and the refrigerant connection line open through operation of the first and second expansion valves, respectively; and the first and second expansion valves may expand the refrigerant so that the expanded refrigerant is respectively supplied to the evaporator and the chiller.

The third expansion valve may expand the refrigerant supplied from the condenser to be inflowed to the heat exchanger when the temperature of the vehicle interior is low, and when the temperature of the vehicle interior is high, the refrigerant supplied from the condenser may be inflowed to the heat exchanger without being in the expanded state.

When cooling the electrical component and the battery module by use of the coolant, the connection line and the branch line may be closed through operation of the first and second valves, the coolant, which is cooled in the radiator and stored in the reservoir tank, may be supplied to the electrical component through operation of the first water pump, and the coolant stored in the reservoir tank may be circulated in the battery coolant line connected to the reservoir tank through operation of the second valve to be supplied to the battery module.

When using the waste heat of the electrical equipment in the heating mode of the vehicle without the operation of the air conditioner, the connection line may be open through an operation of the first valve; in the cooling apparatus, on the basis of the connection line, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank may be closed through operation of the first valve; the branch line may be open through an operation of the second valve to close the battery coolant line other than a portion of the battery coolant line connected to the reservoir tank with respect to the branch line; the coolant whose the temperature is increased while passing through the electrical component by the operation of the first water pump may be supplied to the heater along the heating line connected through the third valve without passing through the radiator; the coolant discharged from the heater may be supplied into the chiller along the heating line, the third valve, the coolant line, the connection line, and the branch line; the coolant discharged from the chiller may be introduced into the reservoir tank through the branch line and the open battery coolant line.

The first valve may open the coolant line connected to the radiator to allow some of the coolant passing through the electrical component to flow into the connection line and the remaining coolant to flow into the radiator when the electrical component is overheated.

A described above, according to the heat pump system for the vehicle according to an exemplary embodiment of the present invention, the temperature of the battery module may be adjusted depending on the mode of the vehicle by use of one chiller for performing heat exchange between the coolant and the refrigerant, and the interior of the vehicle may be heated by use of the coolant, simplifying the entire system.

According to an exemplary embodiment of the present invention, it is also possible to improve the heating efficiency by recovering waste heat from the electrical component and using it for interior heating of the vehicle.

Furthermore, according to an exemplary embodiment of the present invention, it is possible to optimize the performance of the battery module by efficiently controlling the temperature of the battery module, and increase an overall travel distance of the vehicle through efficient management of the battery module.

Furthermore, according to an exemplary embodiment of the present invention can use the coolant heater applied to the heating apparatus may be used to heat the battery module or to assist in an interior heating of the vehicle, reducing the cost and weight.

Furthermore, according to an exemplary embodiment of the present invention, heat of outside air, and waste heat of an electrical component, and a battery module is selectively used in a heating mode of the vehicle, enhancing heating efficiency.

Furthermore, according to an exemplary embodiment of the present invention may improve the cooling performance and reducing power consumption of a compressor by increasing condensation or evaporation performance of the refrigerant using a condenser and a heat exchanger.

DETAILED DESCRIPTION

Exemplary embodiments described in the exemplary embodiment and configurations shown in the drawings are just the most preferable exemplary embodiments of the present invention, but do not limit the spirit and scope of the present invention. Therefore, it may be understood that there may be various equivalents and modifications configured for replacing them at the time of filing of the present application.

To clarify the present invention, portions that are not connected with the description will be omitted, and the same elements or equivalents are referred to by the same reference numerals throughout the specification.

The size and thickness of each element are arbitrarily shown in the drawings, but the present invention is not necessarily limited thereto, and in the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity.

Throughout the present specification and the claims which follow, unless explicitly described to the contrary, the word “comprise” or variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

FIG. 1is a block diagram of a heat pump system for a vehicle according to an exemplary embodiment of the present invention.

The heat pump system for the vehicle according to an exemplary embodiment of the present invention may adjust a temperature of a battery module24by use of one chiller30in which a refrigerant and a coolant are heat-exchanged, and utilizes waste heat of an electrical component15and the battery module24, improving heating efficiency.

Here, in the heat pump system for the electric vehicle, a cooling apparatus10for cooling the electrical component15, a battery cooling apparatus20for cooling the battery module24, a heating apparatus40heating an interior by use of a coolant, and an air conditioner50which is an air conditioning apparatus of cooling the interior may be mutually interconnected.

That is, referring toFIG. 1, the heat pump system includes the cooling apparatus10, the battery cooling apparatus20, the chiller30, and the heating apparatus40.

First, the cooling apparatus10includes a radiator12connected to a coolant line11, a first water pump14, a first valve V1, and a reservoir tank16.

The radiator12is mounted in the front of the vehicle, and a cooling fan13is mounted behind the radiator12, so that the coolant is cooled through an operation of the cooling fan13and heat exchange with the outside air.

Furthermore, the electrical component15may include an electric power control unit (EPCU), a motor, an inverter, or an on board charger (OBC).

The electrical component15configured as described above may be provided in the coolant line11to be cooled in a water-cooled manner.

Accordingly, when the waste heat of the electrical component15is recovered in the heating mode of the vehicle, the heat generated from the EPCU, the motor, the inverter, or the OBC may be recovered.

This cooling apparatus10may circulate the coolant in the coolant line11such that the coolant is supplied to the electrical component15provided in the coolant line11.

The battery cooling apparatus20includes a battery coolant line21connected to the reservoir tank16through a second valve V2and a second water pump22connected to the battery coolant line21, and the battery module24.

The battery cooling apparatus20may selectively circulate the coolant in the battery module24through an operation of the second water pump22.

Meanwhile, the battery module24may be formed as a water-cooled type that supplies power to the electrical component15, and is cooled by a coolant flowing along the battery coolant line21.

Herein, the first water pump14and the second water pump22may each be an electric water pump.

In the exemplary embodiment of the present invention, the chiller30is provided in a branch line31connected to the battery coolant line21through the second valve V2.

The chiller30is connected to a refrigerant line51of an air conditioner50through a refrigerant connection line61. That is, the chiller30may be a water-cooled heat exchanger into which a coolant flows.

Accordingly, the chiller30is selectively connectable to the connection line35connecting the coolant line11and the branch line31through the first valve V1and to the branch line31. The chiller30may regulate the temperature of the coolant by performing heat exchange between the coolant and the refrigerant which is selectively supplied from the air conditioner50.

A first end portion of the connection line35may be connected to the coolant line11via the first valve V1. A second end portion of the connection line35may be connected to the branch line31between the second valve V2and the chiller30.

The connection line35may be selectively open or closed according to the operation of the first valve V1and the first water pumps14. Furthermore, the connection line35may connect the coolant line11and the branch line31according to the operation of the first valve V1.

Also, the heating apparatus40may include a heating line41connected to the coolant line11through a third valve V3, and a third water pump42and a heater52aprovided in the heating line41to supply the coolant having the temperature which is increased while it passes through the electrical component15thereto.

The heater52amay be provided inside a heating, ventilation, and air conditioning (HVAC) module52included in the air conditioner50.

Here, a coolant heater43to selectively heat the coolant circulating in the heating line41may be provided in the heating line41between the third water pump42and the heater52a.

The coolant heater43is ON-operated when the temperature of the coolant supplied to the heater52ain the heating mode of the vehicle is lower than a target temperature to heat the coolant circulated in the heating line41, inflowing the coolant of which the temperature is increased to the heater52a.

The coolant heater43may be an electric heater that operates according to the power supply.

On the other hand, in the exemplary embodiment of the present invention, it is described that the coolant heater43is provided in the heating line41, however it is not limited thereto, and an air heater45to increase the temperature of the outside air inflowing to the interior of the vehicle may be applied instead of the coolant heater43.

The air heater45may be mounted on the rear of the heater52atoward the interior of the vehicle inside the HVAC module52to selectively heat the outside air passing through the heater52a.

That is, the heating apparatus40may be applied to one of the coolant heater43and the air heater45.

The heating apparatus40constructed as described above supplies the high temperature coolant inflowed from the cooling apparatus10to the heating line41in the heating mode of the vehicle or the coolant of which the temperature is increased while circulating through the heating line41to the heater52athrough operation of the third water pump42, cooling the vehicle interior.

Here, the first, second, and third water pumps14,22, and42may be electric water pumps.

In the exemplary embodiment of the present invention, the air conditioner50includes the HVAC module52, a condenser53, a heat exchanger54, a first expansion valve55, an evaporator56, and a compressor59which are connected through the refrigerant line51.

First, the HVAC module52includes the evaporator56connected therewith through the refrigerant line51, and an opening and closing door52bfor controlling the outside air passing through the evaporator56to be selectively introduced into the heater52adepending on cooling, heating, and heating/dehumidifying modes of the vehicle therein.

That is, the opening and closing door52bis open to allow the outside air passing through the evaporator56to be introduced into the heater52ain the heating mode of the vehicle. In contrast, in the cooling mode of the vehicle, the opening and closing door52bcloses off the heater52asuch that the outside air which is cooled while passing through the evaporator56directly flows into the vehicle.

Here, when the coolant heater43is not provided in the heating apparatus40, the air heater45provided in the HVAC module52may be provided at an opposite side of the evaporator56with the heater52ainterposed therebetween.

The air heater45may be operated to raise the temperature of the outside air passing through the heater52awhen the temperature of the coolant supplied to the heater52ais lower than a target temperature for interior heating of the vehicle.

On the other hand, the air heater45may be provided inside the HVAC module52when the coolant heater43is not provided in the heating line41.

That is, in the heat pump system according to an exemplary embodiment of the present invention, only one of the coolant heater43and the air heater45may be applied.

In the exemplary embodiment of the present invention, the condenser53is connected to the refrigerant line51to allow the refrigerant to pass therethrough, and is connected to the heating line41to allow the coolant circulating through the heating apparatus40to pass therethrough.

This condenser53may condense the refrigerant through heat exchange with the coolant supplied through the heat line41. In other words, the condenser53may be a water-cooled heat exchanger into which the coolant flows.

The condenser53configured as described above may perform heat exchange between the refrigerant supplied from the compressor59and the coolant supplied from the heating apparatus40to condense the refrigerant.

In the exemplary embodiment of the present invention, the heat exchanger54may be provided in the refrigerant line51between the condenser53and the evaporator56.

The first expansion valve55is provided in the refrigerant line51between the heat exchanger54and the evaporator56. The first expansion valve55receives the refrigerant passing through the heat exchanger54to expand it.

The accumulator57is provided in the refrigerant line51between the evaporator56and the compressor59and is connected to the refrigerant connection line61.

Such an accumulator57improves the efficiency and durability of the compressor59by supplying only the gaseous refrigerant to the compressor59.

In the exemplary embodiment of the present invention, the first end portion of the refrigerant connection line61is connected to the refrigerant line51between the heat exchanger54and the first expansion valve55. The second end portion of the refrigerant connection line61may be connected to the accumulator57.

Here, the accumulator57may supply the gaseous refrigerant of the refrigerant supplied through the refrigerant connection line61to the compressor59.

On the other hand, the refrigerant connection line61is provided with a second expansion valve63, and the refrigerant line51between the condenser53and the heat exchanger54may be provided with a third expansion valve65.

The second expansion valve63may expand the coolant refrigerant inflowed through the refrigerant connection line61to inflow to the chiller30when cooling the battery module24with the refrigerant.

Here, the second expansion valve63is operated when recovering the waste heat of the electrical component15, or the battery module24, in the heating mode and heating/dehumidification mode of the vehicle.

The second expansion valve63may selectively expand the refrigerant introduced through the refrigerant connection line61to inflow the chiller30.

That is, the second expansion valve63expands the refrigerant discharged from the heat exchanger54and flowing into the chiller30while lowering the temperature of the refrigerant, the temperature of the coolant may be further lowered.

As a result, the battery module24may be cooled more efficiently by inflowing the coolant having the lower temperature while passing through the chiller30.

The third expansion valve65may selectively expand the coolant which is inflowed to the heat exchanger54in the heating mode and the heating/dehumidification mode of the vehicle.

Here, the heat exchanger54may further condense or evaporate the refrigerant condensed from the condenser53through heat exchange with the outside air, depending on a selective operation of the third expansion valve65.

In other words, the heat exchanger54is mounted in the front of the radiator12to mutually heat-exchange the coolant that has been inflowed therein with the outside air.

Meanwhile, when the heat exchanger54condenses the refrigerant, the heat exchanger54may increase sub-cooling of the refrigerant by further condensing the refrigerant condensed at the condenser53, improving a COP (Coefficient Of Performance), which is a coefficient of cooling capacity versus power required by the compressor.

The compressor59is connected via the refrigerant line51between the evaporator58and the condenser53. The present compressor59may compress the refrigerant in the gaseous state and supply the compressed refrigerant to the condenser53.

The first, second, and third expansion valves55,63, and65may be electronic expansion valves that selectively expand the refrigerant while controlling the flow of the refrigerant passing through the refrigerant line51or the refrigerant connection line61.

Also, the first and second valves V1and V2may three-way valves which may distribute the flow, and the third valve V3may be a four-way valve.

Hereinafter, the operation and action of the heat pump system for the vehicle according to an exemplary embodiment of the present invention is described with reference toFIG. 2toFIG. 7in detail.

First, the operation of the heat pump system for the vehicle according to an exemplary embodiment of the present invention is described with reference toFIG. 2when cooling the electrical component15and the battery module24by use of the coolant.

FIG. 2illustrates an operational state diagram for cooling an electrical component and a battery module using a coolant in the heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 2, the branch line31and the connection line35are closed through operations of the first and second valves V1and V2.

Furthermore, the battery coolant line21is connected to the reservoir tank16through operation of the second valve V2.

In the present state, in the cooling apparatus10, the first water pump14is operated to cool the electrical component15. Accordingly, the coolant which is cooled in the radiator12and stored in the reservoir tank16is supplied to the electrical component15.

In the battery cooling apparatus20, the second water pump22is operated to cool the battery module24.

Accordingly, the coolant stored in the reservoir tank16is supplied to the battery module24, while circulating through the battery coolant line21connected to the reservoir tank16by the operation of the second valve V2.

That is, the coolant cooled in the radiator12and stored in the reservoir tank16circulates through the coolant line11and the battery coolant line21by the operations of the first and second water pumps14and22, respectively, to efficiently cool the electrical component15and the battery module24.

The air conditioner50is not operated because the cooling mode of the vehicle is not activated.

On the other hand, although it has been described in the exemplary embodiment of the present invention that both of the electrical component15and the battery module24are cooled, the present invention is not limited thereto, and when one of the electrical component15and the battery module24is separately cooled, the first and second water pumps14and22may be selectively operated.

An operation of the case of cooling the battery module24in the cooling mode of the vehicle will be described with respect toFIG. 3.

FIG. 3illustrates an operational state diagram for cooling a battery module by use of a refrigerant in a cooling mode of a vehicle in the heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 3, in the cooling apparatus10, the coolant is circulated in the coolant line11through operation of the first water pump14. Accordingly, the coolant cooled by the radiator12is circulated to the electrical component15.

Herein, the first connection line35is closed through operation of the first valve V1.

In the heating apparatus40, the coolant line11and the heating line41are connected through operation of the third valve V3such that the coolant supplied from the cooling apparatus11is circulated.

Thus, the coolant cooled by the radiator12may be supplied to the condenser53through operation of the first and third water pumps14and42.

In the battery cooling apparatus20, the branch line31is open through operation of the second valve V2. A portion of the battery coolant line21connected to the reservoir tank16is closed on the basis of the branch line31.

In the present state, the coolant having passed through the chiller30may be supplied to the battery module24while it circulates along the branch line31and the battery coolant line21connected to the branch line31without passing through the reservoir tank16through operation of the second water pump22.

That is, in the battery cooling apparatus20, a closed circuit through which the coolant independently circulates may be formed by connecting the open branch line31with the battery coolant line21in a state where the connection with the connection of the reservoir tank16is closed through operation of the second valve V2.

In the air conditioner50, each constituent element operates to cool the interior of the vehicle. Accordingly, the refrigerant is circulated along the refrigerant line51.

Herein, the refrigerant line51connecting the heat exchanger54and the evaporator56is open through operation of the first expansion valve55. The refrigerant connection line61is open through operation of the second expansion valve63.

Accordingly, the refrigerant having passed through the heat exchanger54may be circulated along the refrigerant line51and the refrigerant connection line61.

Herein, the first and second expansion valves55and63may expand the refrigerant such that the expanded refrigerant is supplied to the evaporator56and the chiller40, respectively. The third expansion valve65may inflow the refrigerant supplied from the condenser53to the heat exchanger54without expanding.

Meanwhile, the heating apparatus40supplies the coolant supplied from the cooling apparatus10to the condenser53through operation of the third water pump42.

Accordingly, the condenser53condenses the coolant using the coolant flowing along the heating line41. Also, the heat exchanger54may additionally condense the refrigerant inflowed from the condenser53through operation of the third expansion valve65through heat exchange with the outside air.

The coolant passing through the chiller30is circulated in the battery coolant line21and the first branch line31without passing through the reservoir tank16to cool the battery module through operation of the second water pump22.

The coolant passing through the chiller30is cooled through heat exchange with the expanded refrigerant which is supplied to the chiller30. The coolant cooled in the chiller30is supplied to the battery module24. Accordingly, the battery module24is cooled by the cooled coolant.

That is, the second expansion valve63expands some of the coolant refrigerant through the sub-condenser54to supply the expanded refrigerant to the chiller30, and opens the refrigerant connection line61.

Accordingly, the refrigerant discharged from the heat exchanger54is expanded to enter a low-temperature and low-pressure state through operation of the second expansion valve63, and flows into the chiller30connected to the refrigerant connection line61.

Then the refrigerant inflowed to the chiller30undergoes heat transfer with the coolant and then inflows to the compressor59after passing through the accumulator57through the refrigerant connection line61.

In other words, the coolant with the increased temperature from cooling the battery module24is cooled through heat exchange inside the chiller30with the low temperature low pressure refrigerant. The cooled coolant is again supplied to the battery module24through the battery coolant line21and the branch line31.

That is, the coolant may efficiently cool the battery module24while repeating the above-described operation.

Meanwhile, the remaining coolant exhausted from the heat exchanger54flows through the refrigerant line51to cool the interior of the vehicle, and sequentially passes through the first expansion valve55, the evaporator56, the compressor59, and the condenser53.

Here, the outside air which is inflowed to the HVAC module52is cooled by the low temperature refrigerant inflowed to the evaporator56while passing through the evaporator56.

At the present time, the opening/closing door52breduces a portion of the cooled outside air passing through the heater52ato not pass through the heater52a. Thus, the cooled outside air may be directly directed into the interior of the vehicle, cooling the interior of the vehicle.

On the other hand, in the evaporator56, the refrigerant of which the condensed amount is increased while sequentially passing through the condenser53and the heat exchanger54is expanded and supplied, evaporating the refrigerant with the further lower temperature.

That is, in the exemplary embodiment of the present invention, the condenser53condenses the refrigerant, and the heat exchanger54further condenses the refrigerant, favoring the subcooling formation of the refrigerant.

As the subcooled refrigerant evaporates with the lower temperature in the evaporator56, the temperature of the coolant which is heat exchanged at the evaporator56may be further reduced, improving cooling performance and efficiency.

While repeating the above-described process, the refrigerant may cool the interior of the vehicle in the cooling mode and simultaneously cool the coolant through the heat exchange while passing through the chiller30.

The coolant of a low temperature cooled by the chiller30inflows to the battery module24. Accordingly, the battery module24may be efficiently cooled by the supplied low temperature coolant.

In the exemplary embodiment of the present invention, the operation for the case of recovering the waste heat of the external heat source, the electrical component15, and the battery module24in the heating mode of the vehicle is described with reference to FIG.4.

FIG. 4illustrates an operational state diagram for waste heat recovery of external heat, an electrical component, and a battery module depending on a heating mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 4, the heat pump system may absorb the external heat from the outside air along with the waste heat of the electrical component15and the battery module24in an initial starting idle state IDLE of the vehicle or in a during initial driving state where the waste heat of the electrical component15is insufficient.

First, in the cooling apparatus10, the first water pump14is operated for circulation of the coolant.

Herein, the connection line35is open through operation of the first valve V1. At the same time, on the basis of the connection line35, a portion of the coolant line11connected to the radiator12and a portion of the coolant line11connecting the radiator12and the reservoir tank16are closed through operation of the first valve V1.

In the present state, the coolant passing through the electrical component15may be supplied to the chiller30along the open connection line35without passage through the radiator12through operation of the first water pump14.

Meanwhile, in the battery cooling apparatus20, the branch line31and the battery coolant line21are open through operation of the second valve V2, respectively. The coolant passing through the battery module24may be supplied to the chiller30along the branch line31through operation of the second water pump22.

That is, in the cooling apparatus10, the coolant line11is connected to the branch line31through the open the connection line35. In the battery cooling apparatus20, on the basis of the branch line31, a portion of the battery coolant line21connected to the battery module24and a portion of the battery coolant line21connected to the reservoir tank16are connected to the branch line31, respectively.

Thus, the coolant passing through the electrical component15continuously circulates along the coolant line11, the connection line35, and the branch line31without passing through the radiator12, and absorbs the waste heat from the electrical component15such that the temperature is increased.

Furthermore, the coolant passing through the battery module24continuously circulates along the battery coolant line21and the branch line31, and absorbs the waste heat from the battery module24such that the temperature is increased.

The coolant with the increased temperature may be supplied to the chiller30provided at the branch line31. That is, the waste heat generated by the electrical component15and the battery module24raises the temperature of the coolant circulating through the coolant line11and the battery coolant line21, respectively.

In the heating apparatus40, the coolant circulates along the heating line41through operation of the third water pump42.

The coolant line11and the heating line41may form the independent closed circuit through operation of the third valve V3.

Thus, the coolant circulating through the heating line41may be supplied to the condenser53after passing through the heater52athrough operation of the third water pump42.

Here, the coolant heater43is operated when the temperature of the coolant circulating along the heating line41is lower than the target temperature, so that the coolant circulating in the heating line41may be heated.

On the other hand, when the air heater45is applied instead of the coolant heater43, the air heater45operates when the temperature of the outside air passing through the heater52ais lower than the target temperature, and the outside air inflowed to the interior of the vehicle may be heated.

In the air conditioner50, each constituent element operates to heat the vehicle interior. Thus, the refrigerant circulates along the refrigerant line51.

Here, the refrigerant line51connecting the condenser53and the evaporator56is closed through operation of the first expansion valve55.

The refrigerant connection line61is open through operation of the second expansion valve63.

Here, the second expansion valve63may supply the refrigerant to the chiller30by expanding the refrigerant supplied from the heat exchanger54to the refrigerant connection line61.

The third expansion valve65may also supply the refrigerant to the heat exchanger54by expanding the refrigerant supplied from the condenser53.

Thus, the heat exchanger54recovers the external heat while evaporating the expanded refrigerant through heat exchange with the outside air.

The coolant, which absorbs the waste heat of the electrical component15and the battery module24and is increased in temperature, is recovered by increasing the temperature of the refrigerant supplied to the chiller30while passing through the chiller30through operation of the first and second water pumps14and22.

That is, the chiller30receives the refrigerant supplied from the heat exchanger54and expanded through operation of the second expansion valve63through the refrigerant connection line61, and evaporates the supplied refrigerant through heat exchange with the coolant of which the temperature is increased while passing through the electrical component15and the battery module24, respectively, recovering the waste heat of the electrical component15and the battery module24.

Next, the refrigerant passing through the chiller30is supplied to the accumulator57along the refrigerant connection line61.

The refrigerant supplied to the accumulator57is separated into gas and liquid. of the refrigerant separated by gas and liquid, the gaseous refrigerant is supplied to the compressor59.

The refrigerant compressed with the high temperature high pressure from the compressor59inflows to the condenser53.

Here, the refrigerant supplied to the condenser53may increase the temperature of the coolant by exchanging heat with the coolant circulating through the heating line41. The coolant with raised temperature is supplied to the heater52a.

Meanwhile, the opening/closing door52bis open so that the outside air inflowed to the HVAC module52and passing through the evaporator56passes through the heater52a.

As a result, the outside air inflow from the outside thereof flows into the internal in an uncooled temperature state when passing through the evaporator56, which is not supplied with the refrigerant. The inflowed outside air is converted to a high temperature state while passing through the heater52ato be inflowed into the interior of the vehicle, realizing the heating of the interior of the vehicle.

That is, the heat pump system according to the exemplary embodiment of the present invention absorbs the external heat from the heat exchanger54when the cooling is required in the initial starting idle state (IDLE) of the vehicle or the during initial driving state and is used to increase the temperature of the refrigerant by use of the waste heat of the electrical component15and the battery module24, reducing the power consumption of the compressor59and improving the cooling efficiency.

Meanwhile, in the exemplary embodiment of the present invention, the waste heat of the electrical component15and the battery module24are recovered together as an exemplary embodiment of the present invention, but the exemplary embodiment is not limited thereto, and the waste heat of the battery module24may be selectively recovered.

That is, when the waste heat of the battery module24is not recovered, in the battery cooling apparatus20, a remaining of the battery coolant line21is closed except for a portion of the battery coolant line21connected to the reservoir tank16based on the branch line31, and the operation of the second water pump22may be stopped.

In the exemplary embodiment of the present invention, the operation for the case of recovering the waste heat of the electrical component15depending on the heating/dehumidification mode of the vehicle is described with reference toFIG. 5.

FIG. 5illustrates an operational state diagram for a heating/dehumidification mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 5, the heat pump system may recover the waste heat of the electrical component15in the heating/dehumidification mode of the vehicle to use the interior heating of the vehicle.

Here, when the temperature of the vehicle interior is a low temperature, the heat pump system may recover the external heat along with the waste heat of the electrical component15. Whereas, when the temperature of the vehicle interior is a high temperature, it may only recover the waste heat of the electrical component15to use in the internal heating of the vehicle.

First, in the cooling apparatus10, the first water pump14is operated for circulation of the coolant.

Herein, the connection line35is open through operation of the first valve V1. At the same time, on the basis of the connection line35, a portion of the coolant line11connected to the radiator12and a portion of the coolant line11connecting the radiator12and the reservoir tank16are closed through operation of the first valve V1.

In the present state, the coolant passing through the electrical component15may be supplied to the chiller30along the open connection line35without passage through the radiator12through operation of the first water pump14.

Meanwhile, in the battery cooling apparatus20, the branch line31is open through operation of the second valve V2, and a remaining of the battery coolant line21is closed except for a portion of the battery coolant line21connected to the reservoir tank16based on the branch line31.

That is, the battery coolant line21connecting the second water pump22and the battery module24is closed, and the operation of the second water pump22is stopped.

In the present state, the coolant passing through the electrical component15is continuously circulated along the coolant line11, the connection line35, and the branch line31without the passage through the radiator12, and absorbs the waste heat from the electrical component15such that the temperature is increased.

The coolant with the increased temperature may be supplied to the chiller30provided at the branch line31.

The coolant discharged from the chiller30is introduced into the reservoir tank16through the branch line31and the open battery coolant line21. Accordingly, the coolant passes through the electrical appliance15along the coolant line11from the reservoir tank16through operation of the first water pump14, may flow into the connection line35.

That is, the waste heat generated by the electrical component15raises the temperature of the coolant circulating through the coolant line11, the connection line35, the branch line31, and the open battery coolant line21.

In the heating apparatus40, the coolant circulates along the heating line41through operation of the third water pump42.

The coolant line11and the heating line41may form the independent closed circuit through operation of the third valve V3.

Thus, the coolant circulating through the heating line41may be supplied to the condenser53after passing through the heater52athrough operation of the third water pump42.

Here, the coolant heater43is operated when the temperature of the coolant circulating along the heating line41is lower than the target temperature, so that the coolant circulating in the heating line41may be heated.

On the other hand, when the air heater45is applied instead of the coolant heater43, the air heater45operates when the temperature of the outside air passing through the heater52ais lower than the target temperature, and the outside air inflowed to the interior of the vehicle may be heated.

In the air conditioner50, each constituent element operates to heat the vehicle interior. Thus, the refrigerant circulates along the refrigerant line51.

Here, the refrigerant line51connecting the condenser53and the evaporator56is open through operation of the first expansion valve55.

The refrigerant connection line61is open through operation of the second expansion valve63.

Here, the first and second expansion valves55and63may expand the refrigerant supplied to the refrigerant connection line61and the refrigerant line51from the heat exchanger54so that the expanded refrigerant is supplied to the evaporator56and the chiller30.

Further, when the temperature of the vehicle interior is low, the third expansion valve65may expand the refrigerant supplied from the condenser53to be inflowed to the heat exchanger54.

Accordingly, the heat exchanger54recovers the external heat while evaporating the expanded refrigerant through the heat exchange with the outside air.

Conversely, the third expansion valve65may inflow the refrigerant supplied from the condenser53to the heat exchanger54without expanding when the temperature of the vehicle interior is high.

Accordingly, the heat exchanger54may condense the refrigerant through heat exchange with the outside air.

Also, the coolant of which the temperature is increased by absorbing the waste heat of the electrical component15is recovered while increasing the temperature of the refrigerant supplied to the chiller30while passing through the chiller30through operation of the first water pump14.

That is, the chiller30receives the refrigerant supplied from the heat exchanger54and expanded through operation of the second expansion valve63through the refrigerant connection line61, and evaporates the supplied refrigerant through heat exchange with the coolant of which the temperature is increased while passing through the electrical component15, recovering the waste heat of the electrical component15.

Next, the refrigerant passing through the chiller30is supplied to the accumulator57along the refrigerant connection line61.

The refrigerant supplied to the accumulator57is separated into gas and liquid. of the refrigerant separated by gas and liquid, the gaseous refrigerant is supplied to the compressor59.

The refrigerant compressed from the compressor59with the high temperature high pressure inflows to the condenser53.

Here, the refrigerant supplied to the condenser53may increase the temperature of the coolant by exchanging heat with the coolant circulating through the heating line41. The coolant with raised temperature is supplied to the heater52a.

On the other hand, the expanded refrigerant supplied to the evaporator56though the operation of the first expansion valve55exchanges heat with the outside air passing through the evaporator56, and is then supplied to the compressor59through the accumulator57along the refrigerant line51.

That is, the refrigerant passing through the evaporator56may be supplied to the compressor59along with the refrigerant inflowed to the accumulator57through the refrigerant connection line61.

The refrigerant compressed by the compressor59with high temperature and high pressure is then inflowed to the condenser53.

Here, the opening/closing door52bis open so that the outside air inflowed to the HVAC module52and passing through the evaporator56passes through the heater52a.

That is, the outside air inflowed to the HVAC module52is dehumidified while passing through the evaporator56by the refrigerant of the low temperature state inflowed to the evaporator56. Next, the outside air is converted into a high temperature state while passing through the heater52aand inflowing to the vehicle interior, heating and dehumidifying the interior of the vehicle.

That is, the heat pump system according to the exemplary embodiment of the present invention selectively absorbs the external heat depending on the internal temperature of the vehicle along with the waste heat generated from the electrical component15in the heating/dehumidification mode of the vehicle by being used to increase the temperature of the refrigerant, reducing the power consumption of the compressor59and improving the heating efficiency.

In the exemplary embodiment of the present invention, the operation for the case of using the waste heat of the electrical equipment15in the heating mode of the vehicle without the operation of the air conditioner50is described with reference toFIG. 6.

FIG. 6illustrates an operational state diagram for recovering and cooling waste heat of an electrical component in a heating mode of a vehicle in a heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 6, the heat management system may recover the waste heat of the electric component15and use it for heating the interior of the vehicle.

First, in the cooling apparatus10, the first water pump14is operated for circulation of the coolant. In the instant case, the air conditioner50is stopped.

Herein, the connection line35is open through operation of the first valve V1.

Accordingly, in the cooling apparatus10, on the basis of the connection line35, a portion of the coolant line11connected to the radiator12and a portion of the coolant line11connecting the radiator12and the reservoir tank16are closed through operation of the first valve V1.

The branch line31is open through operation of the second valve V1to close the battery coolant line21other than a portion of the battery cooling water line21connected to the reservoir tank16with respect to the branch line31.

That is, the battery coolant line21connecting the second water pump22and the battery module24is closed, and the operation of the second water pump22is stopped.

In the present state, the coolant whose the temperature is increased while passing through the electrical component15by the operation of the first water pump14is supplied to the heater52aalong the heating line41connected through the third valve V3without passing through the radiator12.

Here, the coolant introduced into the heating line41passes through the heater52aby the operation of the third water pump42. At the instant time, the coolant heater43is operated when the temperature of the coolant circulating along the heating line41is lower than the target temperature, so that the coolant circulating in the heating line41may be heated.

On the other hand, when the air heater45is applied instead of the coolant heater43, the air heater45may be selectively operated depending on the temperature of the outside air passing through the heater52a.

The air heater45may be operated when the temperature of the outside air passing through the heater52ais lower than a target temperature, heating the outside air flowing into the interior of the vehicle.

The air heater45is operated when the temperature of the outside air that has completed heat exchange with the heated coolant while passing through the heater52ais lower than a predetermined temperature or a target heating temperature.

As a result, when the air heater45is operated, the outside air may be heated while passing through the air heater45, to be introduced into the vehicle interior in a state where the temperature is raised.

In the exemplary embodiment of the present invention, the coolant discharged from the heater52ais introduced into the coolant line11via the heating line41and the third valve V3, and then is supplied into the chiller30along the connection line35and the branch line31.

Here, since the coolant supplied to the chiller30does not flow into the chiller30, the coolant30may pass through the chiller30without heat exchange with the refrigerant.

The coolant discharged from the chiller30passes through the branch line31and the open battery coolant line21sequentially, and introduces into the reservoir tank16again.

That is, the coolant that has passed through the electrical component15continues to circulate along the coolant line11, the heating line41, the connection line35, the branch line31, and a portion of the battery coolant line21without passing through the radiator12, and absorbs the waste heat from the electric component15, such that the temperature thereof increases.

The coolant having the temperature that has been raised is introduced into the heating line41connected to the coolant line11through operation of the third valve V3. Accordingly, the heated coolant introduced into the heating line41is supplied to the heater52a.

Herein, the opening and closing door52bis open such that the outside air flowing into the HVAC module52passes through the heater52a.

Accordingly, the outside air introduced from the outside thereof flows into a room temperature state in which it is not cooled when passing through the evaporator56to which no refrigerant is supplied. The introduced outside air may be converted into a high temperature state while passing through the heater52a, and flows into the vehicle, heating the interior of the vehicle.

In other words, according to an exemplary embodiment of the present invention, it is possible to recover the waste heat generated in the electrical component15while repeating the above-described process, and use the waste heat for internal heating, reducing power consumption and improving overall heating efficiency.

On the other hand, in a process of heating the interior of the vehicle by recovering the waste heat of the electrical component15using the coolant, when the electrical component15is overheated, a portion of the coolant line11connected to the radiator12, and a portion of the coolant line11connecting the radiator12and the reservoir tank16are open through operation of the first valve V1.

Accordingly, the remaining coolant, which is not supplied to the heater52a, is cooled through the radiator12.

The coolant that has been completely cooled may recover waste heat while passing through the electrical component15, and at the same time, may efficiently cool the electrical component15, together with the coolant introduced into the reservoir tank16through the connection line35, the branch line31, and a portion of the battery coolant line21.

When the electrical component15is overheated, the first valve V1may open the coolant line11connected to the radiator12to allow some of the coolant passing through the electrical component15to flow into the connection line35and the remaining coolant to flow into the radiator12.

As a result, some coolant cooled in the radiator12may be supplied to the electrical component15, preventing the electrical component15from overheating.

Therefore, according to an exemplary embodiment of the present invention, it is possible to recover the waste heat generated in the electrical component15, and use the waste heat for interior heating, reducing power consumption and improving overall heating efficiency.

At the same time, according to an exemplary embodiment of the present invention, some coolant may be introduced into the radiator12through operation control of the first valve V1configured for distributing the flow, to be cooled, and then be supplied to the electrical component15, efficiently cooling the electrical component15and ensuring the cooling performance of the electrical component15.

An operation of the case of heating the battery module24will be described with respect toFIG. 7.

FIG. 7illustrates an operational state diagram for heating of a battery module in a heat pump system for a vehicle according to an exemplary embodiment of the present invention.

Referring toFIG. 7, the heat pump system may heat the battery module24by recovering the waste heat of the electrical component15.

First, the connection line35is open in the cooling device10in a state in which the coolant line11connected to the radiator12is closed through operation of the first valve V1. Here, the air conditioner50is stopped.

The branch line31is open through operation of the second valve V2. Accordingly, a remaining of the battery coolant line21is open except for a portion of the battery coolant line21connected to the reservoir tank16based on the branch line31.

As a result, the battery coolant line21connected to the reservoir tank16is closed, and the remaining battery coolant line21connected to the battery module24may be open.

That is, the battery coolant line21connecting the second water pump22and the battery module24in the battery cooling apparatus20is open to be connected to the branch line31.

Accordingly, in the battery cooling apparatus20, the coolant is circulated along the open battery coolant line21and the branch line31through operation of the second water pump22.

Some of the coolant passing through the battery module24may be introduced into the reservoir tank16connected through the second valve V2, and the remaining coolant may flow into the branch line31.

Meanwhile, in the heating apparatus40, the coolant line11and the heating line41are connected through operation of the third valve V3.

In the present state, the coolant whose the temperature is increased while passing through the electrical component15by the operation of the first water pump14is flowed to the heating line41connected through the third valve V3without passing through the radiator12.

That is, the coolant with the increased temperature by waste heat of the electrical component15in the cooling apparatus11may circulate through the heating line41through operation of the third water pump V3.

Herein, the coolant heater43is operated to heat the coolant when the temperature of the coolant circulating along the heating line41is lower than the target temperature. Accordingly, the coolant circulating in the heating line41rises in temperature as it passes through the coolant heater43.

Accordingly, the coolant having an increased temperature while passing through the coolant heater43, is flowed into the coolant line11from the heating line41through the third valve V3. Accordingly, the heated coolant is introduced into the branch line31from the coolant line11through the connection line31.

The heated coolant introduced into the branch line31may be supplied to the battery module24connected through the battery coolant line21and the branch line31.

As a result, the heated coolant may raise the temperature of the battery module24.

As a result, according to an exemplary embodiment of the present invention, it is possible to rapidly increase the temperature of the battery module24while repeating the above-described process, efficiently managing the temperature of the battery module24.

Thus, if the heat pump system for the vehicle according to an exemplary embodiment of the present invention as described above is applied, the temperature of the battery module24may be adjusted depending on the mode of the vehicle by use of one chiller30for performing heat exchange between the coolant and the refrigerant, and the interior of the vehicle may be heated by use of the coolant, simplifying the entire system.

According to an exemplary embodiment of the present invention, it is also possible to improve the heating efficiency by recovering waste heat from the electrical component15and using it for internal heating.

Furthermore, according to an exemplary embodiment of the present invention, it is possible to optimize the performance of the battery module24by efficiently controlling the temperature of the battery module24, and increase an overall travel distance of the vehicle through efficient management of the battery module24.

Furthermore, the present invention may use the coolant heater43applied to the heating apparatus40to heat the battery module24or to assist in an internal heating of the vehicle, reducing the cost and weight.

Furthermore, the present invention selectively utilizes the external heat and the waste heat of the electrical component15and the battery module24in the heating mode of the vehicle, improving the heating efficiency.

The present invention also improves the condensing or evaporation performance of the refrigerant by use of the condenser53and the heat exchanger54, improving the cooling performance and reducing the power consumption of the compressor59.

Furthermore, the present invention may reduce production cost and weight and improve space utilization by simplifying the entire system.