Patent Publication Number: US-11390141-B2

Title: Heat pump system for vehicle

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application claims priority to Korean Patent Application No. 10-2020-0072850 filed on Jun. 16, 2020, the entire contents of which is incorporated herein for all purposes by this 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, 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, a plurality of valves for connection with the respective connection pipes are adopted and noise and vibration due to frequent opening and closing operations of the valves are transferred to the interior of the vehicle to degrade ride comfort. 
     The information included in this Background of the present invention section is only for enhancement of understanding of the general background of the present invention and may not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art. 
     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, a second valve, and a reservoir tank which are connected through a coolant line, and 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 coolant line through the first 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 chiller provided in the battery coolant line between the first valve and the battery module, 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 circulated in the battery coolant line and a refrigerant which is selectively supplied from the air conditioner; a heating apparatus including a heating line connected to the coolant line through the second valve to heat a vehicle interior by use of a coolant and a third water pump and a heater provided on the heating line; a branch line having a first end portion connected to the coolant line between the radiator and the second valve, and a second end portion connected to the first valve; and a chiller connection line connecting the chiller and the first valve separately from the battery coolant line, wherein the reservoir tank is provided in the coolant line between the radiator and the first valve, and is connected to the coolant line connecting the first valve and the first water pump through the supply line, and wherein a condenser included in the air conditioner is connected to the heating line to pass the coolant circulating through the heating apparatus. 
     The first valve may include: a first port connected to the coolant line connected to the reservoir tank; a second port connected to the coolant line connected to the first water pump; a third port connected to the chiller connection line; a fourth port connected to the branch line; a fifth port connected to the battery coolant line connected to the chiller; and a sixth port connected to the battery coolant line connected to the second water pump. 
     The first valve may be operated to discharge the coolant through a port adjacent to a port into which coolant is introduced among the first port, the second port, the third port, the fourth port, the fifth port and the sixth port. 
     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 a door configured to control outside air passing through the evaporator to be selectively introduced into the heater depending on a cooling mode, a heating mode, and a heating and dehumidification mode of the vehicle therein; a condenser provided in the heating line between the second valve and the heater 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 introduced through the refrigerant connection line to flow to the chiller when cooling the battery module by the refrigerant, and the third expansion valve may selectively expand the refrigerant introduced into the heat exchanger in the heating mode and a low temperature dehumidification mode of the vehicle. 
     A first end portion of the refrigerant connection line may be connected to the refrigerant line between the heat exchanger and the first expansion valve, and a second end portion of the refrigerant connection line may be connected to the accumulator. 
     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 a side opposite to the evaporator with respect to the heater which is interposed between the air heater and the evaporator to selectively heat the 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 internal heating. 
     When the battery module is cooled in the cooling mode of the vehicle, in the cooling apparatus, the coolant may be circulated in the coolant line by the operation of the first water pump, and the supply line may be opened; the branch line and the chiller connection line may be closed through operation of the first valve; the coolant line and the battery coolant line may form an independent closed circuits through operation of the first valve; in the battery cooling apparatus, the coolant passing through the chiller may be supplied to the battery module along the battery coolant line through operation of the second water pump; in the heating apparatus, the coolant line and the heating line may be connected through operation of the second valve so that the coolant is supplied from the cooling apparatus; in the air conditioner, in a state that the refrigerant connection line is opened 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 may additionally condense the refrigerant introduced from the condenser through heat exchange with the outside air. 
     When recovering a waste heat of an external heat source and the electrical component in the heating mode of the vehicle, the branch line and the chiller connection line may be opened through operation of the first valve, and the supply line may be opened; in the cooling apparatus, on the basis of the branch line, a portion of the coolant lines respectively connected to the radiator and the reservoir tank may be closed, and the coolant passing through the electrical component may circulate along the opened branch line and an opened portion of the coolant line without passage through the radiator through operation of the first water pump; the coolant introduced into the first valve through the branch line may be introduced into the chiller along a portion of the battery coolant line connecting the chiller and the first valve; the coolant passing through the chiller may be introduced into the first valve along the opened chiller connection line, and then may be circulated in the coolant line connected to the electrical component through the first valve; the coolant line and the heating line may form an independent closed circuits through operation of the second valve, respectively; 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 opened through operation of the second expansion valve; the second expansion valve may expand a refrigerant supplied to the refrigerant connection line and may supply the expanded refrigerant to the chiller; and the third expansion valve may expand the refrigerant supplied from the condenser to be supplied to the heat exchanger. 
     When recovering a waste heat of an external heat source and the battery module in the heating mode of the vehicle, the branch line and the chiller connection line may be closed through operation of the first valve, and the supply line may be closed; the cooling apparatus may be deactivated; in the battery cooling apparatus, the battery coolant line may not be connected to the coolant line through operation of the first valve, and the coolant passing through the battery module may be supplied to the chiller through operation of the second water pump; in the heating apparatus, the heating line may not be connected to the coolant line through operation of the second valve, and 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 opened through operation of the second expansion valve; the second expansion valve may expand a refrigerant supplied to the refrigerant connection line and may supply the expanded refrigerant to the chiller; and the third expansion valve may expand the refrigerant supplied from the condenser to be supplied to the heat exchanger. 
     When performing a low temperature dehumidification mode of the vehicle, the branch line and the chiller connection line may be opened through operation of the first valve, and the supply line may be opened; in the cooling apparatus, on the basis of the branch line, a portion of the coolant lines respectively connected to the radiator and the reservoir tank may be closed, and the coolant passing through the electrical component may circulate along the opened branch line and an opened portion of the coolant line without passage through the radiator through operation of the first water pump; the coolant introduced into the first valve through the branch line may be introduced into the chiller along a portion of the battery coolant line connecting the chiller and the first valve; the coolant passing through the chiller may be introduced into the first valve along the opened chiller connection line, and then may be circulated in the coolant line connected to the electrical component through the first valve; the coolant line and the heating line may form an independent closed circuits through operation of the second valve, respectively; 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 opened through operation of the first and second expansion valves, respectively; 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 supplied to the heat exchanger. 
     When cooling the electrical component and the battery module by use of the coolant, the branch line may be closed through operation of the first valve; the chiller connection line may be opened through operation of the first valve, and the supply line may be opened; a portion of the battery coolant line connecting the chiller and the first valve may be closed through operation of the first valve; the coolant line connecting the reservoir tank and the first valve may be connected to the battery coolant line through operation of the first valve; the coolant cooled in the radiator may pass through the battery module along the battery coolant line from the first valve through operation of the first and second water pumps; the coolant passing through the battery module may be introduced from the chiller to the first valve along the opened chiller connection line, and then may be supplied to the electrical component while flowing along the coolant line connected to the first water pump. 
     When using the waste heat of the electrical component without operating the air conditioner in the heating mode of the vehicle, the branch line and the chiller connection line may be opened through operation of the first valve; in the cooling apparatus, on the basis of the branch line, the coolant line connected to the radiator, the reservoir tank, and the first valve may be closed; the supply line may be opened; the battery coolant line except for the battery coolant line connected to the chiller may be closed through operation of the first valve; in the heating apparatus, the heating line may be connected to the coolant line through operation of the second valve; the coolant having the temperature that has risen while passing through the electrical component by the operation of the first water pump may be supplied to the heating line connected to the opened coolant line without passing through the radiator; the coolant introduced into the heating line may be supplied to the heater through operation of the third water pump; the coolant discharged from the heater may be introduced into the first valve along the opened coolant line and the opened branch line; the coolant introduced into the first valve may be again introduced into the first valve along the opened chiller connection line after passing through the chiller along the opened portion of the battery coolant line; and the coolant again introduced into the first valve may be supplied to the electrical component along the opened the coolant line. 
     When using the waste heat of the electrical component without operating the air conditioner and cooling of the electrical component is required, in the heating mode of the vehicle, the branch line and the chiller connection line may be closed through operation of the first valve; in the cooling apparatus, the coolant line may be opened; the supply line may be opened; the battery cooling apparatus may be deactivated; in the heating apparatus, the heating line may be connected to the coolant line through operation of the second valve; the coolant having the temperature that has risen while passing through the electrical component by the operation of the first water pump may be supplied to the heating line connected to the coolant line; the coolant introduced into the heating line may be supplied to the heater through operation of the third water pump; and the coolant discharged from the heater may be cooled while passing through the radiator along the coolant line through operation of the first water pump, and then may recover waste heat from the electrical component while passing through the electrical component and cools the electrical component at the same time. 
     The first valve may be a 6-way valve, and the second valve may be a four-way valve. 
     The electrical component may include an electric power control unit (EPCU), or a motor, or an inverter, or an autonomous driving controller, or an on board charger (OBC). 
     The supply line may be connected to the coolant line when the coolant is circulated to the coolant line by the operation of the first water pump. 
     The battery cooling apparatus may further include a first coolant heater provided in the battery coolant line between the battery module and the chiller. 
     When the battery module is heated, the first coolant heater may be operated to heat a coolant supplied to the battery module along the battery coolant line. 
     A described above, according to the heat pump system for the vehicle according to various exemplary embodiments 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 various exemplary embodiments of the present invention, it is also possible to improve the heating efficiency by recovering waste heat from the electrical component and waste heat from the battery module and using it for internal heating. 
     Furthermore, according to various exemplary embodiments 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 various exemplary embodiments 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 internal heating of the vehicle, reducing the cost and weight. 
     Furthermore, according to various exemplary embodiments 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 various exemplary embodiments 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. 
     The methods and apparatuses of the present invention have other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings, which are incorporated herein, and the following Detailed Description, which together serve to explain certain principles of the present invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  illustrates a block diagram of a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 2  is an enlarged view of part A of  FIG. 1 . 
         FIG. 3  illustrates an operational state diagram for cooling electrical components and a battery module by use of a radiator in the heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 4  illustrates 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 various exemplary embodiments of the present invention. 
         FIG. 5  illustrates an operational state diagram for waste heat recovery of external heat and an electrical component depending on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 6  illustrates an operational state diagram for waste heat recovery of external heat and a battery module depending on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 7  illustrates an operational state diagram for performing the heating mode using waste heat of an electrical component in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 8  illustrates an operational state diagram for cooling an electrical component while performing the heating mode using waste heat of the electrical component in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
         FIG. 9  illustrates an operational state diagram according to a low temperature dehumidification mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     
    
    
     It may be understood that the appended drawings are not necessarily to scale, presenting a somewhat simplified representation of various features illustrative of the basic principles of the present invention. The specific design features of the present invention as included herein, including, for example, specific dimensions, orientations, locations, and shapes will be determined in part by the particularly intended application and use environment. 
     In the figures, reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. 
     DETAILED DESCRIPTION 
     Reference will now be made in detail to various embodiments of the present invention(s), examples of which are illustrated in the accompanying drawings and described below. While the present invention(s) will be described in conjunction with exemplary embodiments of the present invention, it will be understood that the present description is not intended to limit the present invention(s) to those exemplary embodiments. On the other hand, the present invention(s) is/are intended to cover not only the exemplary embodiments of the present invention, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the present invention as defined by the appended claims. 
     Various exemplary embodiments of the present invention will hereinafter be described in detail with reference to the accompanying drawings. 
     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, parts that are not connected to 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 this 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. 
     Furthermore, the terms, “ . . . unit”, “ . . . mechanism”, “ . . . portion”, “ . . . member”, etc. used herein mean a unit of inclusive components performing at least one or more functions or operations. 
       FIG. 1  is a block diagram of a heat pump system for a vehicle according to various exemplary embodiments of the present invention, and  FIG. 2  is an enlarged view of part A of  FIG. 1 . 
     The heat pump system for the vehicle according to various exemplary embodiments of the present invention may adjust a temperature of a battery module  24  by use of one chiller  30  in which a refrigerant and a coolant are heat exchanged, and may recover waste heat generated from an electrical component  15  and a battery module  24  to use it for internal heating. 
     Such the heat pump system may be applied to electric vehicles. 
     Referring to  FIG. 1 , the heat pump system may include a cooling apparatus  10 , a battery cooling apparatus  20 , a chiller  30 , and a heating apparatus  40 . 
     First, the cooling apparatus  10  includes a radiator  12  connected to a coolant line  11 , a first water pump  14 , a first valve V 1 , a second valve V 2 , and a reservoir tank  16 . 
     The radiator  12  is mounted in the front of the vehicle, and a cooling fan  13  is mounted behind the radiator  12 , so that the coolant is cooled through an operation of the cooling fan  13  and heat exchange with the outside air. 
     Furthermore, the electrical component  15  may include an electric power control unit (EPCU), or a motor, or an inverter, or an autonomous driving controller, or an on board charger (OBC). 
     The electrical component  15  configured as described above may be provided in the coolant line  11  to be cooled in a water-cooled manner. 
     Accordingly, when the waste heat of the electrical component  15  is recovered in the heating mode of the vehicle, the heat generated from the EPCU, or the motor, or the inverter, or the autonomous driving controller, or the OBC may be recovered. 
     Also, the reservoir tank  16  is provided on the coolant line  11  between the radiator  12  and the first water pump  14 . The coolant cooled in the radiator  12  may be stored in the reservoir tank  16 . 
     This cooling apparatus  10  may circulate the coolant in the coolant line  11  through operation of the first water pump  14  such that the coolant is supplied to the electrical component  15  provided in the coolant line  11 . 
     Meanwhile, the reservoir tank  16  may be connected to the coolant line  11  connecting the first valve V 1  and the first water pump  14  through a supply line  17 . 
     The supply line  17  may be connected to the coolant line  11  when the coolant is circulated to the coolant line  11  by the operation of the first water pump  14 . 
     That is, when the first water pump  14  is operated, the reservoir tank  16  may always flow a portion of the stored coolant into the coolant line  11  through the supply line  17 . 
     Accordingly, when the first water pump  14  is operated, the occurrence of cavitation in the first water pump  14  may be prevented. Furthermore, a damage of the first water pump  14  due to the cavitation may be prevented in advance. 
     Furthermore, the cooling apparatus  10  may further include a branch line  18 . 
     A first end portion of the branch line  18  is connected to the coolant line  11  between the radiator  12  and the second valve V 2 . A second end portion of the branch line  18  may be connected to the first valve V 1 . 
     When the waste heat of the electrical component  15  is recovered, the branch line  18  may be selectively opened or closed through operation of the first valve V 1  so that the coolant that has passed through the electric equipment  15  is supplied back into the electric equipment  15  without passing through the radiator  12 . 
     In the exemplary embodiment of the present invention, the battery cooling apparatus  20  includes a battery coolant line  21  connected to the coolant line  11  through the first valve V 1  and a second water pump  22  and the battery module  24  connected to the battery coolant line  21 . 
     The battery cooling apparatus  20  may selectively circulate the coolant in the battery module  24  through an operation of the second water pump  22 . 
     Herein, the first and second water pumps  14  and  22  may be electric water pumps. 
     Meanwhile, the battery cooling apparatus  20  may further include a first coolant heater  26  provided in the battery coolant line  21  between the battery module  24  and the first valve V 1 . 
     When it is required to increase the temperature of the battery module  24 , the first coolant heater  26  is turned on to heat the coolant circulated in the battery coolant line  21  such that the coolant of which temperature is increased may be supplied to the battery module  24 . 
     The first coolant heater  26  may be an electric heater that operates according to supply of electric power. 
     That is, the first coolant heater  26  is operated when the temperature of the coolant supplied to the battery module  24  is lower than the target temperature, so that the coolant circulating in the battery coolant line  21  may be heated. 
     Accordingly, the coolant having an increased temperature while passing through the first coolant heater  26  may be supplied to the battery module  24 , to raise the temperature of the battery module  24 . 
     That is, the first coolant heater  26  may selectively operate when the temperature of the battery module  24  is raised. 
     In the exemplary embodiment of the present invention, the chiller  30  is provided in the battery coolant line  21  between the first valve V 1  and the battery module  24 . 
     The chiller  30  is connected to a refrigerant line  51  of an air conditioner  50  through a refrigerant connection line  61 . That is, the chiller  30  may be a water-cooled heat exchanger into which a coolant flows. 
     Herein, the chiller  30  may be connected to the first valve V 1  through a chiller connection line  31 . 
     That is, the chiller connection line  31  may connect the chiller  30  and the first valve V 1  separately from the battery coolant line  21  by the operation of the first valve V 1 . 
     Accordingly, the chiller  30  may regulate the temperature of the coolant by performing heat exchange between the coolant which is selectively supplied to the battery coolant line  21  and the chiller connection line  31 , and the refrigerant which is selectively supplied from the air conditioner  50 . 
     Herein, a first end portion of the chiller connection line  31  is connected to the first valve V 1 . A second end portion of the chiller connection line  31  may be connected to the chiller  30 . 
     The chiller connection line  31  may connect the chiller  30  to the first valve V 1  according to the operation of the first valve V 1 . 
     The heating apparatus  40  may include a heating line  41  selectively connectable to the coolant line  11  through a second valve V 2  to heat a vehicle interior by use of the coolant and a third water pump  42  and a heater  52   a  provided on the heating line  41 . 
     When an interior of the vehicle is heated, the heating device  40  may connect the coolant line  11  and the heating line  41  connected to the electrical component  15  by the operation of the second valve V 2  such that the high-temperature coolant that has passed through the electrical component  15  is supplied to the heating line  41 . 
     Accordingly, the high-temperature coolant may be supplied to the heater  52   a  along the heating line  41 . 
     That is, the heating apparatus  40  constructed as described above supplies the high temperature coolant introduced from the cooling apparatus  10  to the heating line  41  in the heating mode of the vehicle or the coolant of which the temperature is increased while circulating through the heating line  41  to the heater  52   a  through operation of the third water pump  42 , heating the vehicle interior. 
     Herein, the third water pump  42  may be electric water pump. 
     Meanwhile, the heater  52   a  may be provided inside a heating, ventilation, and air conditioning (HVAC) module  52  included in the air conditioner  50 . 
     Herein, a second coolant heater  43  to selectively heat the coolant circulating in the heating line  41  may be provided in the heating line  41  between the third water pump  42  and the heater  52   a.    
     The second coolant heater  43  is ON-operated when the temperature of the coolant supplied to the heater  52   a  in the heating mode of the vehicle is lower than a target temperature to heat the coolant circulated in the heating line  41 , inflowing the coolant of which the temperature is increased to the heater  52   a.    
     The second coolant heater  43  may 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 second coolant heater  43  is provided in the heating line  41 , however it is not limited thereto, and an air heater  45  to increase the temperature of the outside air inflowing to the interior of the vehicle may be applied instead of the second coolant heater  43 . 
     The air heater  45  may be mounted on the rear of the heater  52   a  toward the interior of the vehicle inside the HVAC module  52  to selectively heat the outside air passing through the heater  52   a.    
     That is, any one of the second coolant heater  43  and the air heater  45  may be applied to the heating apparatus  40 . 
     The heating apparatus  40  constructed as described above supplies the high temperature coolant inflowed from the cooling apparatus  10  to the heating line  41  in the heating mode of the vehicle or the coolant of which the temperature is increased while circulating through the heating line  41  to the heater  52   a  through operation of the third water pump  42 , heating the vehicle interior. 
     In the exemplary embodiment of the present invention, the air conditioner  50  includes the HVAC module  52 , a condenser  53 , a heat exchanger  54 , a first expansion valve  55 , an evaporator  56 , an accumulator  57 , and a compressor  59  which are connected through the refrigerant line  51 . 
     First, the HVAC module  52  includes the evaporator  56  connected therewith through the refrigerant line  51 , and an opening and closing door  52   b  for controlling the outside air passing through the evaporator  56  to be selectively introduced into the heater  52   a  depending on cooling mode, heating mode, and heating and dehumidification modes of the vehicle therein. 
     That is, the opening and closing door  52   b  is opened to allow the outside air passing through the evaporator  56  to be introduced into the heater  52   a  in the heating mode of the vehicle. In contrast, in the cooling mode of the vehicle, the opening and closing door  52   b  closes off the heater  52   a  such that the outside air which is cooled while passing through the evaporator  56  directly flows into the vehicle. 
     Herein, when the second coolant heater  43  is not provided in the heating apparatus  40 , the air heater  45  provided in the HVAC module  52  may be provided at an opposite side of the evaporator  56  with the heater  52   a  interposed therebetween. 
     The air heater  45  may be operated to raise the temperature of the outside air flowing into the heater  52   a  when the temperature of the coolant supplied to the heater  52   a  is lower than a target temperature for internal heating. 
     On the other hand, the air heater  45  may be provided inside the HVAC module  52  when the second coolant heater  43  is not provided in the heating line  41 . 
     That is, in the heat pump system according to various exemplary embodiments of the present invention, only one of the second coolant heater  43  and the air heater  45  may be applied. 
     In the exemplary embodiment of the present invention, the condenser  53  is connected to the refrigerant line  51  to allow the refrigerant to pass therethrough. The condenser  53  is provided on the heating line  41  between the second valve V 2  and the heater  52   a  such that the coolant circulating the heating apparatus  40  passes through. 
     This condenser  53  may condense the refrigerant through heat exchange with the coolant circulating the heating line  41 . That is, the condenser  53  may be a water-cooled heat exchanger into which the coolant flows. 
     The condenser  53  configured as described above may perform heat exchange between the refrigerant supplied from the compressor  59  and the coolant supplied from the heating apparatus  40  to condense the refrigerant. 
     In the exemplary embodiment of the present invention, the heat exchanger  54  may be provided in the refrigerant line  51  between the condenser  53  and the evaporator  56 . 
     The first expansion valve  55  is provided in the refrigerant line  51  between the heat exchanger  54  and the evaporator  56 . The first expansion valve  55  receives the refrigerant passing through the heat exchanger  54  to expand it. 
     The accumulator  57  is provided in the refrigerant line  51  between the evaporator  56  and the compressor,  59  and is connected to the refrigerant connection line  61 . 
     Such the accumulator  57  improves the efficiency and durability of the compressor  59  by supplying only the gaseous refrigerant to the compressor  59 . 
     In the exemplary embodiment of the present invention, the first end portion of the refrigerant connection line  61  is connected to the refrigerant line  51  between the heat exchanger  54  and the first expansion valve  55 . The second end portion of the refrigerant connection line  61  may be connected to the accumulator  57 . 
     Herein, the accumulator  57  may supply the gaseous refrigerant of the refrigerant supplied through the refrigerant connection line  61  to the compressor  59 . 
     On the other hand, the refrigerant connection line  61  is provided with a second expansion valve  63 , and the refrigerant line  51  between the condenser  53  and the heat exchanger  54  may be provided with a third expansion valve  65 . 
     The second expansion valve  63  may expand the coolant inflowed through the refrigerant connection line  61  to inflow to the chiller  30  when cooling the battery module  24  with the refrigerant. 
     Herein, the second expansion valve  63  is operated when recovering the waste heat of the electrical component  15 , or the battery module  26 , in the heating mode, and heating and dehumidification mode of the vehicle. 
     The second expansion valve  63  may selectively expand the refrigerant introduced through the refrigerant connection line  61  to inflow the chiller  30 . 
     That is, the second expansion valve  63  may introduce the refrigerant exhausted from the heat exchanger  54  into the chiller  30  in a state where the temperature of the refrigerant is reduced by expanding the refrigerant, to further reduce the temperature of the coolant passing through the interior of the chiller  30 . 
     As a result, the coolant having the temperature which is reduced while passing through the chiller  30  is introduced into the battery module  24 , being more efficiently cooled. 
     The third expansion valve  65  may selectively expand the refrigerant which is flowed into the heat exchanger  54  in the heating mode and a low temperature dehumidification mode of the vehicle. 
     Herein, the heat exchanger  54  may further condense or evaporate the refrigerant condensed from the condenser  53  through heat exchange with the outside air, depending on a selective operation of the third expansion valve  65 . 
     In other words, the heat exchanger  54  is mounted in the front of the radiator  12  to mutually heat-exchange the coolant that has been inflowed therein with the outside air. The heat exchanger  54  may be an air-cooled heat exchanger for condensing the refrigerant by use of outside air. 
     Meanwhile, when the heat exchanger  54  condenses the refrigerant, the heat exchanger  54  may further condense the refrigerant which is condensed in the condenser  53  to increase sub cooling of the refrigerant, improving a coefficient of performance (COP), which is a coefficient of the cooling capacity relative to the power required by the compressor. 
     The compressor  59  is connected thereto between the evaporator  56  and the condenser  53  through the refrigerant line  51 . This compressor  59  may compress the gaseous refrigerant and supply the compressed refrigerant to the condenser  53 . 
     The first, second, and third expansion valves  55 ,  63 , and  65  may be electronic expansion valves that selectively expand the coolant while controlling a flow of the refrigerant through the coolant line  51  or the refrigerant connection line  61 . 
     Furthermore, the first valve V 1  may be 6-Way valve, and the second valve V 2  may be four-way valve. 
     Herein, a structure of the first valve V 1  will be described in more detail with reference to  FIG. 2 . 
     In the exemplary embodiment of the present invention, the first valve V 1  may include first, second, third, fourth, fifth, and sixth ports P 1 , P 2 , P 3 , P 4 , P 5 , and P 6 . 
     First, the first port P 1  is connected to the coolant line  11  connected to the reservoir tank  16 . 
     The second port P 2  is connected to the coolant line  11  connected to the first water pump  14 . 
     Herein, the supply line  17  may be connected to the coolant line  11  connecting the second port P 2  and the first water pump  14 . 
     The third port P 3  is connected to the chiller connection line  31 , and the fourth port P 4  is connected to the branch line  18 . 
     The fifth port P 5  is connected to the battery coolant line  21  connected to the chiller  30  between the chiller  30  and the first valve V 1 . The sixth port P 6  is connected to the battery coolant line  21  connected to the second water pump  22 . 
     Herein, the first valve V 1  may be operated to discharge the coolant through a port adjacent to the port into which the coolant is introduced among the first port, the second port, the third port, the fourth port, the fifth port and the sixth port P 1 , P 2 , P 3 , P 4 , P 5 , and P 6 . 
     For example, the coolant introduced into the first port P 1  may be discharged through the second port P 2  or the sixth port P 6  mounted adjacent to the first port P 1  according to the operation of the first valve V 1 . 
     That is, the first valve V 1  to is configured to simplify the structure, and for convenience of valve control, when two ports adjacent to each other are closed, remaining four ports are opened so that two ports adjacent to each other are connected to each other, controlling the flow of the coolant. 
     Hereinafter, an operation and function of the heat pump system for the vehicle according to various exemplary embodiments of the present invention configured as described above will be described in detail with reference to  FIG. 3  to  FIG. 9 . 
     First, an operation of a case of cooling the electrical component  15  and the battery module  24  using the radiator  12  in the heat pump system for the vehicle according to the exemplary embodiment of the present invention will be described with reference to  FIG. 3 . 
       FIG. 3  illustrates an operational state diagram for cooling electrical components and a battery module by use of a radiator in the heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Referring to  FIG. 3 , the branch line  18  is closed through operation of the first valve V 1 . The chiller connection line  31  is opened through operation of the first valve V 1 . 
     The supply line  17  is opened. That is, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     Herein, a portion of the battery coolant line  21  connecting the chiller  30  and the first valve V 1  through operation of the first valve V 1  is closed. 
     Furthermore, the battery coolant line  21  is connected to the coolant line  11  by the operation of the first valve V 1 . 
     The coolant line  11  connecting the reservoir tank  16  and the first valve V 1  is connected to the battery coolant line  21  through operation of the first valve V 1 . 
     In the present state, in the cooling apparatus  10 , the first water pump  14  is operated to cool the electrical component  15 . 
     In the battery cooling apparatus  20 , the second water pump  22  is operated to cool the battery module  24 . 
     Accordingly, the coolant which is cooled in the radiator  12  and stored in the reservoir tank  16  is supplied to the battery module  24 , while circulating through the battery coolant line  21  by operations of the first valve V 1  and the second water pump  22 . 
     That is, the coolant introduced into the first valve V 1  from the reservoir tank  16  through the first port P 1  is introduced into the battery coolant line  21  through the sixth port P 6 . 
     The coolant introduced into the battery coolant line  21  passes through the battery module  24  and is introduced into the chiller  30 . 
     Accordingly, the coolant passing through the battery module  24  is introduced from the chiller  30  to the first valve V 1  along the opened chiller connection line  31 . Thereafter, the coolant may be supplied to the electrical component  15  while flowing along the coolant line  11  connected to the first water pump  14  by the operation of the first water pump  14 . 
     That is, the coolant discharged from the chiller  30  is introduced into the third port P 3  of the first valve V 1  along the opened chiller connection line  31 , and is discharged to the coolant line  11  connected to the first water pump  14  through the second port P 2 . 
     Herein, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     That is, the coolant cooled in the radiator  12  and stored in the reservoir tank  16  circulates through the coolant line  11  and the battery coolant line  21  by the operations of the first and second water pumps  14  and  22 , respectively, to efficiently cool the electrical component  15  and the battery module  24 . 
     The air conditioner  50  is not operated because the cooling mode of the vehicle is deactivated. 
     On the other hand, although it has been described in the exemplary embodiment of the present invention that both of the electrical component  15  and the battery module  24  are cooled, the present invention is not limited thereto, and when one of the electrical component  15  and the battery module  24  is separately cooled, the first and second water pumps  14  and  22 , and the first valve V 1  may be selectively operated. 
     An operation of the case of cooling the battery module  24  in the cooling mode of the vehicle will be described with respect to  FIG. 4 . 
       FIG. 4  illustrates 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 various exemplary embodiments of the present invention. 
     Referring to  FIG. 4 , in the cooling apparatus  10 , the coolant is circulated in the coolant line  11  by the operation of the first water pump  14 . At the same time, the supply line  17  is opened. 
     That is, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     Herein, the branch line  18  and the chiller connection line  31  are closed through operation of the first valve V 1 . 
     Accordingly, the coolant introduced into the first valve V 1  from the reservoir tank  16  through the first port P 1  may be introduced into the coolant line  11  through the second port P 2 . 
     In the battery cooling apparatus  20 , the second water pump  22  is operated to cool the battery module  24 . 
     Accordingly, in the battery cooling apparatus  20 , the coolant may be circulated in the battery coolant line  21  by the operation of the second water pump  22 . 
     Herein, the cooling apparatus  10  and the battery cooling apparatus  20  may form an independent closed circuit through which each coolant is separately circulated by the operation of the first valve V 1 . 
     That is, the battery cooling apparatus  20  is not connected to the coolant line  11  by the operation of the first valve V 1 . 
     In the present state, the battery cooling apparatus  20  may form a closed circuit through which the coolant is independently circulated in the battery coolant line  21  by operation of the second water pump  22 . 
     That is, the coolant line  11  and the battery coolant line  21  form independent closed circuits through operation of the first valve V 1 , respectively. 
     Accordingly, in the battery cooling apparatus  20 , the coolant passing through the chiller  30  may be supplied to the battery module  24  along the battery coolant line  21  through operation of the second water pump  22 . 
     The coolant introduced into the battery coolant line  21  is passed through the battery module  24  and is introduced into the chiller  30 . 
     Accordingly, the coolant passing through the battery module  24  is introduced from the chiller  30  to the first valve V 1  along the opened battery coolant line  21 . Thereafter, the coolant may be supplied to the battery module  24  while flowing along the battery coolant line  21  by the operation of the second water pump  22 . 
     That is, the coolant discharged from the chiller  30  is introduced into the fifth port P 5  of the first valve V 1  along the battery coolant line  21 , and is discharged to the battery coolant line  21  connected to the second water pump  22  through the sixth port P 6 . 
     Meanwhile, in the heating apparatus  40 , the heating line  41  is connected to the coolant line  11  through operation of the second valve V 2 . 
     In the present state, the coolant supplied from the cooling apparatus  10  is circulated in the heating line  41  through operation of the third water pump  42 . 
     Accordingly, the coolant cooled in the radiator  12  may be supplied to the condenser  53  through operation of the first and third water pump  14  and  42 , after passing through the electrical component  15 . 
     In the air conditioner  50 , each constituent element operates to cool the interior of the vehicle. Accordingly, the refrigerant is circulated along the refrigerant line  51 . 
     Herein, the refrigerant line  51  connecting the heat exchanger  54  and the evaporator  56  is opened through operation of the first expansion valve  55 . The refrigerant connection line  61  is opened through operation of the second expansion valve  63 . 
     Accordingly, the refrigerant having passed through the heat exchanger  54  may be circulated along the refrigerant line  51  and the refrigerant connection line  61 . 
     Herein, the first and second expansion valves  55  and  63  may expand the refrigerant such that the expanded refrigerant is supplied to the evaporator  56  and the chiller  30 , respectively. The third expansion valve  65  may inflow the refrigerant supplied from the condenser  53  to the heat exchanger  54  without expanding. 
     Meanwhile, the heating apparatus  40  supplies the coolant supplied from the cooling apparatus  10  to the condenser  53  through operation of the third water pump  42 . 
     The condenser  53  condenses the refrigerant by use of the coolant flowing along the heating line  41 . Also, the heat exchanger  54  may further condense the refrigerant introduced from the condenser  53  through operation of the third expansion valve  65  through heat exchange with the outside air. 
     The coolant passing through the chiller  30  is circulated in the battery coolant line  21  to cool the battery module  24  through operation of the second water pump  22 . 
     The coolant passing through the chiller  30  is cooled through heat exchange with the expanded refrigerant which is supplied to the chiller  30 . The coolant cooled in the chiller  30  is supplied to the battery module  24 . Accordingly, the battery module  24  is cooled by the cooled coolant. 
     That is, the second expansion valve  63  expands some of the coolant through the heat exchanger  54  to supply the expanded coolant to the chiller  30 , and opens the refrigerant connection line  61 . 
     Accordingly, the refrigerant discharged from the heat exchanger  54  is expanded to enter a low-temperature and low-pressure state through operation of the second expansion valve  63 , and flows into the chiller  30  connected to the refrigerant connection line  61 . 
     Thereafter, the refrigerant flowing into the chiller  30  is performed heat exchange with the coolant, and then is introduced into the compressor  59  after passing through the accumulator  57  through the refrigerant connection line  61 . 
     In other words, the coolant with the increased temperature from cooling the battery module  24  is cooled through heat exchange with the low temperature low pressure refrigerant inside the chiller  30 . The cooled coolant is again supplied to the battery module  24  through the battery coolant line  21 . 
     That is, the coolant may efficiently cool the battery module  24  while repeating the above-described operation. 
     On the other hand, the remaining refrigerant discharged from the heat exchanger  54  flows through the refrigerant line  51  to cool the interior of the vehicle, and sequentially passes through the first expansion valve  55 , the evaporator  56 , the compressor  59 , and the condenser  53 . 
     Herein, the outside air flowing into the HVAC module  52  is cooled while passing through the evaporator  56  by the low-temperature refrigerant flowing into the evaporator  56 . 
     In the instant case, a portion of the heater  52   a  through which the cooled outside air passes is closed by the opening and closing door  52   b  such that the outside air does not pass through the heater  52   a . Accordingly, the cooled outside air directly flows into the interior of the vehicle, cooling the vehicle interior. 
     On the other hand, the coolant having an amount of condensation which is increased while sequentially passing through the condenser  53  and the heat exchanger  54  may be expanded and supplied to the evaporator  56 , allowing the refrigerant to be evaporated to a lower temperature. 
     As a result, in the exemplary embodiment of the present invention, the condenser  53  condenses the refrigerant, and the heat exchanger  54  further condenses the refrigerant, which is advantageous in forming the sub-cooling of the refrigerant. 
     Furthermore, as the sub-cooled refrigerant may be evaporated to a lower temperature in the evaporator  56 , the temperature of the outside air passing through the evaporator  56  may be further lowered, improving cooling performance and efficiency. 
     The refrigerant may cool the interior of the vehicle in the cooling mode of the vehicle while repeating the above-described processes, and at the same time, may cool the coolant through the heat exchange while passing through the chiller  30 . 
     The low-temperature coolant cooled in the chiller  30  is introduced into the battery module  24 . Accordingly, the battery module  24  may be efficiently cooled by the low-temperature coolant supplied therefrom. 
     In the exemplary embodiment of the present invention, the operation for the case of recovering the waste heat of the external heat source and the electrical component  15  in the heating mode of the vehicle is described with reference to  FIG. 5 . 
       FIG. 5  illustrates an operational state diagram for waste heat recovery of external heat and an electrical component depending on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Referring to  FIG. 5 , the heat pump system may absorb the external heat from the outside air along with the waste heat of the electrical component  15  in an initial starting idle state IDLE of the vehicle or in a during initial driving state where the waste heat of the electrical component  15  is insufficient. 
     First, in the cooling apparatus  10 , the first water pump  14  is operated for circulation of the coolant. The supply line  17  is opened. 
     Thus, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     Herein, the branch line  18  and the chiller connection line  31  are opened through operation of the first valve V 1 . 
     Accordingly, on the basis of the branch line  18 , a portion of the coolant line  11  connected to the radiator  12  and a portion of the coolant line  11  connecting the radiator  12  and the reservoir tank  16  are closed through operation of the first valve V 1 . 
     In the present state, the coolant passing through the electrical component  15  may circulate along the opened branch line  18  and an opened portion of the coolant line  11  without passage through the radiator  12  through operation of the first water pump  14 . 
     Herein, the coolant introduced into the first valve V 1  through the branch line  18  may be introduced into the chiller  30  along a portion of the battery coolant line  21  connecting the chiller  30  and the first valve V 1 . 
     The coolant passing through the chiller  30  is introduced into the first valve V 1  along the opened chiller connection line  31 . Thereafter, the coolant is circulated in the coolant line  11  connected to the electrical component  15  through the first valve V 1 . 
     Meanwhile, in the battery cooling apparatus  20 , the second water pump  22  is deactivated. 
     Thus, the coolant passing through the electrical component  15  continuously circulates along the coolant line  11 , the branch line  18 , an opened portion of the battery coolant line  21 , and the chiller connection line  31  without passing through the radiator  12 , and absorbs the waste heat from the electrical component  15  such that the temperature is increased. 
     The coolant with the increased temperature may be supplied to the chiller  30  provided at the battery coolant line  21 . That is, the waste heat generated by the electrical component  15  raises the temperature of the coolant supplied to the chiller  30 . 
     The coolant introduced from the branch line  18  to the first valve V 1  through the fourth port P 4  is introduced into the battery coolant line  21  connected to the chiller  30  through the fifth port P 5 . 
     Thereafter, the coolant passing through the chiller  30  is introduced into the third port P 3  of the first valve V 1  along the opened chiller connection line  31 . The coolant introduced into the third port P 3  is discharged to the coolant line  11  connected to the first water pump  14  through the second port P 2  connected to the third port P 3 . 
     While repeatedly performing such an operation, the coolant absorbs the waste heat from the electric component  15  and may increase the temperature. 
     Meanwhile, in the heating apparatus  40 , the coolant circulates along the heating line  41  through operation of the third water pump  42 . 
     The coolant line  11  and the heating line  41  may form the independent closed circuit through operation of the second valve V 2 , respectively. 
     Thus, the coolant circulating through the heating line  41  may be supplied to the condenser  53  after passing through the heater  52   a  through operation of the third water pump  42 . 
     Herein, the second coolant heater  43  is operated when the temperature of the coolant circulating along the heating line  41  is lower than the target temperature, so that the coolant circulating in the heating line  41  may be heated. 
     On the other hand, when the air heater  45  is applied instead of the second coolant heater  43 , the air heater  45  operates when the temperature of the outside air passing through the heater  52   a  is lower than the target temperature, and the outside air introduced into the interior of the vehicle may be heated. 
     In the air conditioner  50 , each constituent element operates to heat the vehicle interior. Thus, the refrigerant circulates along the refrigerant line  51 . 
     Herein, the refrigerant line  51  connecting the condenser  53  and the evaporator  56  is closed through operation of the first expansion valve  55 . 
     The refrigerant connection line  61  is opened through operation of the second expansion valve  63 . 
     Herein, the second expansion valve  63  may supply the refrigerant to the chiller  30  by expanding the refrigerant supplied from the heat exchanger  54  to the refrigerant connection line  61 . 
     The third expansion valve  65  may also supply the refrigerant to the heat exchanger  54  by expanding the refrigerant supplied from the condenser  53 . 
     Thus, the heat exchanger  54  recovers 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 component  15  is increased in temperature, is recovered by increasing the temperature of the refrigerant supplied to the chiller  30  while passing through the chiller  30  through operation of the first water pump  14 . 
     That is, the chiller  30  receives the refrigerant supplied from the heat exchanger  54  and expanded through operation of the second expansion valve  63  through the refrigerant connection line  61 , and evaporates the supplied refrigerant through heat exchange with the coolant of which the temperature is increased while passing through the electrical component  15 , recovering the waste heat of the electrical component  15 . 
     Thereafter, the refrigerant passing through the chiller  30  is supplied to the accumulator  57  along the refrigerant connection line  61 . 
     The refrigerant supplied to the accumulator  57  is separated into gas and liquid. of the refrigerant separated by gas and liquid, the gaseous refrigerant is supplied to the compressor  59 . 
     The refrigerant compressed with the high temperature high pressure from the compressor  59  inflows to the condenser  53 . 
     Herein, the refrigerant supplied to the condenser  53  may increase the temperature of the coolant by exchanging heat with the coolant circulating through the heating line  41 . The coolant with raised temperature is supplied to the heater  52   a.    
     Meanwhile, the opening and closing door  52   b  is opened so that the outside air introduced into the HVAC module  52  and passing through the evaporator  56  passes through the heater  52   a.    
     As a result, the outside air inflow from the outside thereof flows into the internal in an uncooled temperature state when passing through the evaporator  56 , which is not supplied with the refrigerant. The introduced outside air is converted to a high temperature state while passing through the heater  52   a  to be introduced 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 exchanger  54  when the heating 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 component  15 , reducing the power consumption of the compressor  59  and improving the cooling efficiency. 
     In the exemplary embodiment of the present invention, the operation for the case of recovering the waste heat of the external heat source and the battery module  24  in the heating mode of the vehicle is described with reference to  FIG. 6 . 
       FIG. 6  illustrates an operational state diagram for waste heat recovery of external heat and a battery module depending on a heating mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Referring to  FIG. 6 , the heat pump system may absorb the external heat from the outside air along with the waste heat of the battery module  24  in an initial starting idle state IDLE of the vehicle or in a during initial driving state where the waste heat of the electrical component  15  is insufficient. 
     First, the cooling apparatus  10  is deactivated. 
     Furthermore, the branch line  18  and the chiller connection line  31  are closed through operation of the first valve V 1 , and the supply line  17  is closed. 
     In the battery cooling apparatus  20 , the battery coolant line  21  is not connected to the coolant line  11  through operation of the first valve V 1 . 
     In the present state, the second water pump  22  is operated to circulate the coolant through the battery coolant line  21 . Accordingly, the coolant passing through the battery module  24  is supplied to the chiller  30 . 
     Herein, the coolant passing through the chiller  30  is introduced into the third port P 3  of the first valve V 1  along the battery coolant line  21 . Thereafter, the coolant is introduced into the battery coolant line  21  connected to the second water pump  22  through the sixth port P 6  connected to the third port P 3 . 
     That is, the coolant passing through the battery module  24  may circulate the battery coolant line  21  through operation of the second water pump  22 . 
     Accordingly, the coolant circulating along the battery coolant line  21  absorbs the waste heat from the battery module  24  and may increase the temperature. 
     The coolant with the increased temperature may be supplied to the chiller  30  provided at the battery coolant line  21 . That is, the waste heat generated by the battery module  24  raises the temperature of the coolant supplied to the chiller  30 . 
     Meanwhile, in the heating apparatus  40 , the coolant circulates along the heating line  41  through operation of the third water pump  42 . 
     Herein, the heating line  41  is not connected to the coolant line  11  through operation of the second valve V 2 . 
     Thus, the coolant circulating through the heating line  41  may be supplied to the condenser  53  after passing through the heater  52   a  through operation of the third water pump  42 . 
     Herein, the second coolant heater  43  is operated when the temperature of the coolant circulating along the heating line  41  is lower than the target temperature, so that the coolant circulating in the heating line  41  may be heated. 
     On the other hand, when the air heater  45  is applied instead of the second coolant heater  43 , the air heater  45  operates when the temperature of the outside air passing through the heater  52   a  is lower than the target temperature, and the outside air introduced into the interior of the vehicle may be heated. 
     In the air conditioner  50 , each constituent element operates to heat the vehicle interior. Thus, the refrigerant circulates along the refrigerant line  51 . 
     Herein, the refrigerant line  51  connecting the condenser  53  and the evaporator  56  is closed through operation of the first expansion valve  55 . 
     The refrigerant connection line  61  is opened through operation of the second expansion valve  63 . 
     Herein, the second expansion valve  63  may supply the refrigerant to the chiller  30  by expanding the refrigerant supplied from the heat exchanger  54  to the refrigerant connection line  61 . 
     The third expansion valve  65  may also supply the refrigerant to the heat exchanger  54  by expanding the refrigerant supplied from the condenser  53 . 
     Thus, the heat exchanger  54  recovers the external heat while evaporating the expanded refrigerant through heat exchange with the outside air. 
     The coolant, which absorbs the waste heat of the battery module  24  is increased in temperature, is recovered by increasing the temperature of the refrigerant supplied to the chiller  30  while passing through the chiller  30  through operation of the second water pump  22 . 
     That is, the chiller  30  receives the refrigerant supplied from the heat exchanger  54  and expanded through operation of the second expansion valve  63  through the refrigerant connection line  61 , and evaporates the supplied refrigerant through heat exchange with the coolant of which the temperature is increased while passing through the battery module  24 , recovering the waste heat of the battery module  24 . 
     Thereafter, the refrigerant passing through the chiller  30  is supplied to the accumulator  57  along the refrigerant connection line  61 . 
     The refrigerant supplied to the accumulator  57  is separated into gas and liquid. of the refrigerant separated by gas and liquid, the gaseous refrigerant is supplied to the compressor  59 . 
     The refrigerant compressed with the high temperature high pressure from the compressor  59  inflows to the condenser  53 . 
     Herein, the refrigerant supplied to the condenser  53  may increase the temperature of the coolant by exchanging heat with the coolant circulating through the heating line  41 . The coolant with raised temperature is supplied to the heater  52   a.    
     Meanwhile, the opening and closing door  52   b  is opened so that the outside air flowing into the HVAC module  52  and passing through the evaporator  56  passes through the heater  52   a.    
     As a result, the outside air inflow from the outside thereof flows into the internal in an uncooled temperature state when passing through the evaporator  56 , which is not supplied with the refrigerant. The introduced outside air is converted to a high temperature state while passing through the heater  52   a  to be introduced 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 exchanger  54  when the heating 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 battery module  24 , reducing the power consumption of the compressor  59  and improving the cooling efficiency. 
     In the exemplary embodiment of the present invention, an operation of the case of using the waste heat of the electrical component  15  without operating the air conditioner  50  in the heating mode of the vehicle will be described with reference to  FIG. 7 . 
       FIG. 7  illustrates an operational state diagram for performing the heating mode using waste heat of an electrical component in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Referring to  FIG. 7 , the heat pump system may perform heating the interior of the vehicle by use of waste heat from the electrical component  15  without operating the air conditioner  50 . 
     First, in the cooling apparatus  10 , the first water pump  14  is operated for circulation of the coolant. In the instant case, the air conditioner  50  is deactivated. 
     Herein, the branch line  18  and the chiller connection line  31  are opened through operation of the first valve V 1 . The supply line  17  is opened. 
     Thus, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     Accordingly, on the basis of the branch line  18 , a portion of the coolant line  11  connected to the radiator  12  and a portion of the coolant line  11  connecting the radiator  12  and the reservoir tank  16  are closed through operation of the first valve V 1 . 
     That is, on the basis of the branch line  18 , the portion of the coolant line  11  connected to the radiator  12 , the reservoir tank  16 , and the first valve V 1  may be closed. 
     Furthermore, the battery coolant line  21  except for the battery coolant line  21  connected to the chiller  30  is closed through operation of the first valve V 1 . 
     In the present state, the coolant passing through the electrical component  15  may circulate along the opened branch line  18  and an opened portion of the coolant line  11  without passage through the radiator  12  through operation of the first water pump  14 . 
     Herein, the coolant introduced into the first valve V 1  through the branch line  18  may be introduced into the chiller  30  along a portion of the battery coolant line  21  connecting the chiller  30  and the first valve V 1 . 
     The coolant passing through the chiller  30  is introduced into the first valve V 1  along the opened chiller connection line  31 . Thereafter, the coolant is circulated in the coolant line  11  connected to the electrical component  15  through the first valve V 1 . 
     Meanwhile, in the battery cooling apparatus  20 , the second water pump  22  is deactivated. 
     That is, the battery coolant line  21  connecting the second water pump  22  and the battery module  24  is closed, and the operation of the battery cooling apparatus  20  is deactivated. 
     Thus, the coolant passing through the electrical component  15  continuously circulates along the coolant line  11 , the branch line  18 , an opened portion of the battery coolant line  21 , and the chiller connection line  31  without passing through the radiator  12 , and absorbs the waste heat from the electrical component  15  such that the temperature is increased. 
     That is, the coolant introduced from the branch line  18  to the first valve V 1  through the fourth port P 4  is introduced into the battery coolant line  21  connected to the chiller through the fifth port P 5 . 
     Thereafter, the coolant passing through the chiller  30  is introduced into the third port P 3  of the first valve V 1  along the opened chiller connection line  31 . The coolant introduced into the third port P 3  is discharged to the coolant line  11  connected to the first water pump  14  through the second port P 2  connected to the third port P 3 . 
     While repeatedly performing such an operation, the coolant absorbs the waste heat from the electric component  15  and may increase the temperature. 
     In the heating apparatus  40 , the heating line  41  is connected to the coolant line  11  through operation of the second valve V 2 . 
     In the present state, the coolant having the temperature that has risen while passing through the electrical component  15  by the operation of the first water pump  14  is supplied to the heating line  41  connected to the opened coolant line  11  without passing through the radiator  12 . 
     The coolant introduced into the heating line  41  may be supplied to the heater  52   a  through operation of the third water pump  42 . 
     The coolant discharged from the heater  52   a  passes through the second valve V 2  and is introduced into the first valve V 1  along the opened portion of the coolant line  11  and the opened branch line  18 . 
     The coolant introduced into the first valve V 1  is again introduced into the first valve V 1  along the opened chiller connection line  31  after passing through the chiller  30  along the opened portion of the battery coolant line  21 . 
     The coolant again introduced into the first valve V 1  is supplied to the electrical component  15  along the opened the coolant line  11 . 
     That is, the coolant that has passed through the electrical component  15  continues to circulate along the opened coolant line  11 , the branch line  18 , the opened portion of the battery coolant line  21 , and the chiller connection lines  31  without passing through the radiator  12 , and absorbs the waste heat from the electric component  15  such that the temperature thereof increases. 
     The coolant having the temperature that has been raised is introduced into the heating line  41  connected to the coolant line  11  without passing through the radiator  12 . 
     The coolant introduced into the heating line  41  may pass through the heater  52   a  through operation of the third water pump  42 . 
     Herein, the second coolant heater  43  is operated when the temperature of the coolant circulating along the heating line  41  is lower than the target temperature, so that the coolant circulating in the heating line  41  may be heated. 
     On the other hand, when the air heater  45  is applied instead of the second coolant heater  43 , the air heater  45  may be selectively operated depending on the temperature of the outside air passing through the heater  52   a.    
     That is, the air heater  45  may be operated when the temperature of the outside air passing through the heater  52   a  is lower than a target temperature, heating the outside air flowing into the interior of the vehicle. 
     The air heater  45  is operated when the temperature of the outside air that has completed heat exchange with the high-temperature coolant while passing through the heater  52   a  is lower than a predetermined temperature or a target heating temperature. 
     When the air heater  45  is operated, the outside air may be heated while passing through the air heater  45 , to be introduced into the vehicle interior in a state where the temperature is raised. 
     Meanwhile, the high-temperature coolant supplied to the heater  52   a  performs heat exchange with the outside air, and then is introduced into a portion of the coolant line  11  connected to the heating line  41  through the second valve V 2 . 
     Thereafter, the coolant is introduced into the first valve V 1  along the opened branch line  18  without passing through the radiator  12 . 
     The coolant introduced into the first valve V 1  sequentially passes the opened battery coolant line  21 , the chiller  30 , and the chiller connection line  31 , and is again introduced into the coolant line  11  connected to the electrical component  15 . 
     Meanwhile, the opening and closing door  52   b  is opened such that the outside air flowing into the HVAC module  52  passes through the heater  52   a.    
     As a result, the outside air inflow from the outside thereof flows into the internal in an uncooled temperature state when passing through the evaporator  56 , which is not supplied with the refrigerant. The introduced outside air is converted to a high temperature state while passing through the heater  52   a  to be introduced into the interior of the vehicle, realizing the heating of the interior of the vehicle. 
     In other words, according to various exemplary embodiments of the present invention, it is possible to recover the waste heat generated in the electrical component  15  while repeating the above-described process, and use the waste heat for internal heating, reducing power consumption and improving overall heating efficiency. 
     In the exemplary embodiment of the present invention, an operation of the case of using the waste heat of the electrical component  15  without operating the air conditioner  50  and the cooling of the electrical component  15  is required in the heating mode of the vehicle will be described with reference to  FIG. 8 . 
       FIG. 8  illustrates an operational state diagram for cooling an electrical component while performing the heating mode using waste heat of the electrical component in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Referring to  FIG. 8 , the heat pump system may perform heating the interior of the vehicle by use of waste heat from the electrical component  15  without operating the air conditioner  50 , and cool the electrical component  15  at same time. 
     Referring to  FIG. 8 , in the cooling apparatus  10 , the first water pump  14  is operated for circulation of the coolant. 
     Herein, the branch line  18  and the chiller connection line  31  are closed through operation of the first valve V 1 . The supply line  17  is opened. 
     Thus, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     The battery coolant line  21  connecting the second water pump  22  and the battery module  24  is closed, and the operation of the battery cooling apparatus  20  is deactivated. 
     Meanwhile, in the heating apparatus  40 , the heating line  41  is connected to the coolant line  11  through operation of the second valve V 2 . 
     In the present state, the coolant having the temperature that has risen while passing through the electrical component  15  by the operation of the first water pump  14  is supplied to the heating line  41  connected to the opened coolant line  11 . 
     The coolant introduced into the heating line  41  may be supplied to the heater  52   a  through operation of the third water pump  42 . 
     The coolant discharged from the heater  52   a  is introduced into the opened coolant line  11  through the second valve V 2 . 
     Thereafter, the coolant introduced into the coolant line  11  is cooled while passing through the radiator  12 , and is again introduced into the electrical component  15  along the coolant line  11  through operation of the first water pump  14 . 
     That is, the coolant passing through the electrical component  15  absorbs the waste heat from the electric component  15  such that the temperature thereof increases, and is supplied to the heater  52   a  through the heating line  41  connected to the coolant line  11 . 
     Through the present operation, the coolant of which the temperature is increased by absorbing the waste heat of the electrical component  15  circulates through the heating apparatus  40 . Thereafter, the coolant is cooled while passing through the radiator  12  through operation of the first water pump  14 . 
     The coolant that has been completely cooled may recover waste heat while passing through the electrical component  15 , and at the same time, may efficiently cool the electrical component  15 . 
     Meanwhile, in the heating apparatus  40 , the coolant having the temperature that has risen while passing through the electrical component  15  circulates along the heating line  41  through operation of the third water pump  42 . 
     Accordingly, the coolant circulating the heating line  41  is supplied to the heater  52   a , after passing through the condenser  53  through operation of the third water pump  42 . 
     Herein, the second coolant heater  43  is operated when the temperature of the coolant circulating along the heating line  41  is lower than the target temperature, so that the coolant circulating in the heating line  41  may be heated. 
     On the other hand, when the air heater  45  is applied instead of the second coolant heater  43 , the air heater  45  may be selectively operated depending on the temperature of the outside air passing through the heater  52   a.    
     That is, the air heater  45  may be operated when the temperature of the outside air passing through the heater  52   a  is lower than a target temperature, heating the outside air flowing into the interior of the vehicle. 
     The air heater  45  is operated when the temperature of the outside air that has completed heat exchange with the high-temperature coolant while passing through the heater  52   a  is lower than a predetermined temperature or a target heating temperature. 
     When the air heater  45  is operated, the outside air may be heated while passing through the air heater  45 , to be introduced into the vehicle interior in a state where the temperature is raised. 
     Herein, the opening and closing door  52   b  is opened such that the outside air flowing into the HVAC module  52  passes through the heater  52   a.    
     As a result, the outside air inflow from the outside thereof flows into the internal in an uncooled temperature state when passing through the evaporator  56 , which is not supplied with the refrigerant. The introduced outside air is converted to a high temperature state while passing through the heater  52   a  to be introduced into the interior of the vehicle, realizing the heating of the interior of the vehicle. 
     On the other hand, the coolant discharged from the heater  52   a  is cooled while passing through the radiator  12  along the coolant line  11  through operation of the first water pump  14 . Thereafter, the cooled coolant may recover waste heat from the electrical component  15  while passing through the electrical component  15  and cool the electrical component  15  at the same time. 
     As a result, the coolant cooled in the radiator  12  may be supplied to the electrical component  15 , preventing the electrical component  15  from overheating. 
     In other words, according to various exemplary embodiments of the present invention, it is possible to recover the waste heat generated in the electrical component  15  while repeating the above-described process, and use the waste heat for internal heating, reducing power consumption and improving overall heating efficiency. 
     Furthermore, in various exemplary embodiments of the present invention, as the coolant that has passed through the heating apparatus  40  is cooled in the radiator  12  and supplied to the electrical component  15 , and the coolant may recover waste heat while passing through the electrical component  15  and efficiently cool the electrical component  15  at the same time. 
     In the exemplary embodiment of the present invention, an operation according to a low temperature dehumidification mode of the vehicle in the exemplary embodiment of the present invention will be described with reference to  FIG. 9 . 
       FIG. 9  illustrates an operational state diagram according to a low temperature dehumidification mode in a heat pump system for a vehicle according to various exemplary embodiments of the present invention. 
     Herein, the low temperature dehumidification mode is a mode that operates when dehumidification is required in the vehicle interior in the heating mode of the vehicle. 
     Referring to  FIG. 9 , when the waste heat of the electrical component  15  is sufficient, the heat pump system may recover the waste heat of the electrical component  15  and use it for the internal heating of the vehicle. 
     First, in the cooling apparatus  10 , the first water pump  14  is operated for circulation of the coolant. At the same time, the supply line  17  is opened. 
     Thus, a portion of the coolant stored in the reservoir tank  16  may be circulated along the coolant line  11  through the opened supply line  17 . 
     Herein, the branch line  18  and the chiller connection line  31  are opened through operation of the first valve V 1 . 
     Accordingly, on the basis of the branch line  18 , a portion of the coolant line  11  connected to the radiator  12  and a portion of the coolant line  11  connecting the radiator  12  and the reservoir tank  16  are closed through operation of the first valve V 1 . 
     In the present state, the coolant passing through the electrical component  15  may circulate along the opened branch line  18  and an opened portion of the coolant line  11  without passage through the radiator  12  through operation of the first water pump  14 . 
     Herein, the coolant introduced into the first valve V 1  through the branch line  18  may be introduced into the chiller  30  along a portion of the battery coolant line  21  connecting the chiller  30  and the first valve V 1 . 
     The coolant passing through the chiller  30  is introduced into the first valve V 1  along the opened chiller connection line  31 . Thereafter, the coolant is circulated in the coolant line  11  connected to the electrical component  15  through the first valve V 1 . 
     Meanwhile, in the battery cooling apparatus  20 , the second water pump  22  is deactivated. 
     Thus, the coolant passing through the electrical component  15  continuously circulates along the coolant line  11 , the branch line  18 , an opened portion of the battery coolant line  21 , and the chiller connection line  31  without passing through the radiator  12 , and absorbs the waste heat from the electrical component  15  such that the temperature is increased. 
     The coolant with the increased temperature may be supplied to the chiller  30  provided at the battery coolant line  21 . That is, the waste heat generated by the electrical component  15  raises the temperature of the coolant supplied to the chiller  30 . 
     The coolant introduced from the branch line  18  to the first valve V 1  through the fourth port P 4  is introduced into the battery coolant line  21  connected to the chiller  30  through the fifth port P 5 . 
     Thereafter, the coolant passing through the chiller  30  is introduced into the third port P 3  of the first valve V 1  along the opened chiller connection line  31 . The coolant introduced into the third port P 3  is discharged to the coolant line  11  connected to the first water pump  14  through the second port P 2  connected to the third port P 3 . 
     While repeatedly performing such an operation, the coolant absorbs the waste heat from the electric component  15  and may increase the temperature. 
     Meanwhile, in the heating apparatus  40 , the coolant circulates along the heating line  41  through operation of the third water pump  42 . 
     The coolant line  11  and the heating line  41  may form the independent closed circuit through operation of the second valve V 2 , respectively. 
     Thus, the coolant circulating through the heating line  41  may be supplied to the condenser  53  after passing through the heater  52   a  through operation of the third water pump  42 . 
     As a result, the condenser  53  condenses the refrigerant supplied from the compressor  59  using the coolant circulating along the heating line  41 . 
     At the present time, the temperature of the coolant circulating in the heating line  41  is increased by heat exchange with the refrigerant while passing through the condenser  53 . The coolant with the increased temperature may be supplied to the heater  52   a  along the heating line  41 . 
     Herein, the second coolant heater  43  is operated when the temperature of the coolant circulating along the heating line  41  is lower than the target temperature, so that the coolant circulating in the heating line  41  may be heated. 
     On the other hand, when the air heater  45  is applied instead of the second coolant heater  43 , the air heater  45  operates when the temperature of the outside air passing through the heater  52   a  is lower than the target temperature, and the outside air introduced into the interior of the vehicle may be heated. 
     The air heater  45  is operated when the temperature of the outside air that has completed heat exchange with the high-temperature coolant while passing through the heater  52   a  is lower than a predetermined temperature or a target heating temperature. 
     When the air heater  45  is operated, the outside air may be heated while passing through the air heater  45 , to be introduced into the vehicle interior in a state where the temperature is raised. 
     Meanwhile, in the air conditioner  50 , each constituent element operates to heat and dehumidification the interior of the vehicle. Accordingly, the refrigerant is circulated along the refrigerant line  51 . 
     Herein, the refrigerant line  51  connecting the condenser  53  and the evaporator  56  is opened through operation of the first expansion valve  55 . 
     The refrigerant connection line  61  is opened through operation of the second expansion valve  63 . 
     Herein, the first and second expansion valves  55  and  63  may expand the refrigerant supplied from the heat exchanger  54  to the refrigerant connection line  61  and the refrigerant line  51  such that the expanded refrigerant is supplied to the evaporator  56  and the chiller  30 , respectively. 
     The third expansion valve  65  may also supply the refrigerant to the heat exchanger  54  by expanding the refrigerant supplied from the condenser  53 . 
     Thus, the heat exchanger  54  recovers 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 component  15  and is increased in temperature, is recovered by increasing the temperature of the refrigerant supplied to the chiller  30  while passing through the chiller  30  through operation of the first water pump  14 . 
     That is, the chiller  30  receives the refrigerant supplied from the heat exchanger  54  and expanded through operation of the second expansion valve  63  through the refrigerant connection line  61 , and evaporates the supplied refrigerant through heat exchange with the coolant of which the temperature is increased while passing through the electrical component  15 , recovering the waste heat of the electrical component  15 . 
     Thereafter, the refrigerant passing through the chiller  30  is supplied to the accumulator  57  along the refrigerant connection line  61 . 
     The refrigerant supplied to the accumulator  57  is separated into gas and liquid. of the refrigerant separated by gas and liquid, the gaseous refrigerant is supplied to the compressor  59 . 
     The refrigerant compressed with the high temperature high pressure from the compressor  59  inflows to the condenser  53 . 
     Herein, the refrigerant supplied to the condenser  53  may increase the temperature of the coolant by exchanging heat with the coolant circulating through the heating line  41 . The coolant with raised temperature is supplied to the heater  52   a.    
     On the other hand, the expanded refrigerant supplied to the evaporator  56  through operation of the first expansion valve  55  is supplied to the compressor  59  via the accumulator  57  along the refrigerant line  51  after heat exchanging with the outside air passing through the evaporator  56 . 
     That is, the refrigerant passing through the evaporator  56  may be supplied to the compressor  59  along with the refrigerant introduced into the accumulator  57  through the refrigerant connection line  61 . 
     The refrigerant compressed by the compressor  59  with high temperature and high pressure is then introduced into the condenser  53 . 
     Herein, the opening and closing door  52   b  is opened so that the outside air introduced into the HVAC module  52  and passing through the evaporator  56  passes through the heater  52   a.    
     That is, the outside air introduced into the HVAC module  52  is dehumidified while passing through the evaporator  56  by the refrigerant of the low temperature state introduced into the evaporator  56 . Next, the outside air is converted into a high temperature state while passing through the heater  52   a  and introducing into 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 component  15  in the low temperature dehumidification mode of the vehicle by being used to increase the temperature of the refrigerant, reducing the power consumption of the compressor  59  and improving the heating efficiency. 
     Thus, if the heat pump system for the vehicle according to various exemplary embodiments of the present invention as described above is applied, the temperature of the battery module  24  may be adjusted depending on the mode of the vehicle by use of one chiller  30  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 various exemplary embodiments of the present invention, it is also possible to improve the heating efficiency by recovering waste heat from the electrical component  15  and waste heat from the battery module  24  and using it for internal heating. 
     Furthermore, according to various exemplary embodiments of the present invention, it is possible to optimize the performance of the battery module  24  by efficiently controlling the temperature of the battery module  24 , and increase an overall travel distance of the vehicle through efficient management of the battery module  24 . 
     Furthermore, the present invention may use the second coolant heater  43  applied to the heating apparatus  40  to heat the battery module  24  or 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 component  15  and the battery module  24  in 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 condenser  53  and the heat exchanger  54 , improving the cooling performance and reducing the power consumption of the compressor  59 . 
     Furthermore, the entire system may be simplified to reduce manufacturing cost and weight, and to improve space utilization. 
     In various exemplary embodiments of the present invention, a controller is connected to at least one of the elements of the heat pump system, to control the operations thereof. 
     In addition, the term “controller”, “control unit” or “control device” refers to a hardware device including a memory and a processor configured to execute one or more steps interpreted as an algorithm structure. The memory stores algorithm steps, and the processor executes the algorithm steps to perform one or more processes of a method in accordance with various exemplary embodiments of the present invention. The controller according to exemplary embodiments of the present invention may be implemented through a nonvolatile memory configured to store algorithms for controlling operation of various components of a vehicle or data about software commands for executing the algorithms, and a processor configured to perform operation to be described above using the data stored in the memory. The memory and the processor may be individual chips. Alternatively, the memory and the processor may be integrated in a single chip. The processor may be implemented as one or more processors. 
     The controller or the control unit may be at least one microprocessor operated by a predetermined program which may include a series of commands for carrying out the method disclosed in the aforementioned various exemplary embodiments of the present invention. 
     The aforementioned invention can also be embodied as computer readable codes on a computer readable recording medium. The computer readable recording medium is any data storage device that can store data which can be thereafter read by a computer system. Examples of the computer readable recording medium include hard disk drive (HDD), solid state disk (SSD), silicon disk drive (SDD), read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy discs, optical data storage devices, etc and implementation as carrier waves (e.g., transmission over the Internet). 
     In various exemplary embodiments of the present invention, each operation described above may be performed by a controller, and the controller may be configured by multiple controllers, or an integrated single controller. 
     For convenience in explanation and accurate definition in the appended claims, the terms “upper”, “lower”, “inner”, “outer”, “up”, “down”, “upwards”, “downwards”, “front”, “rear”, “back”, “inside”, “outside”, “inwardly”, “outwardly”, “interior”, “exterior”, “internal”, “external”, “inner”, “outer”, “forwards”, and “backwards” are used to describe features of the exemplary embodiments with reference to the positions of such features as displayed in the figures. It will be further understood that the term “connect” or its derivatives refer both to direct and indirect connection. 
     The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. They are not intended to be exhaustive or to limit the present invention to the precise forms disclosed, and obviously many modifications and variations are possible in light of the above teachings. The exemplary embodiments were chosen and described to explain certain principles of the present invention and their practical application, to enable others skilled in the art to make and utilize various exemplary embodiments of the present invention, as well as various alternatives and modifications thereof. It is intended that the scope of the present invention be defined by the Claims appended hereto and their equivalents.