Vehicle heat pump system

Abstract

By using high-temperature coolant to heat the vehicle's interior and applying a single valve to control the flow of the coolant, the overall system is simplified while reducing manufacturing costs and weight. [Solution] The system includes a control valve that controls the flow of coolant flowing into the interior and has multiple ports formed therein, multiple coolant lines connected to the control valve through which coolant is selectively flowed by the control valve, and a radiator, electrical components, battery, and heater core connected to or provided in any of the multiple coolant lines, and further includes a coolant heater that independently heats the coolant flowing into two selected coolant lines from the multiple coolant lines.

Description

Technical Field

[0001] The present invention relates to a vehicle heat pump system, and more particularly, to a vehicle heat pump system that uses high-temperature cooling water to heat a vehicle interior and applies a valve for controlling the flow of the cooling water.

Background Art

[0002] Generally, an automotive air conditioning system includes an air conditioner that circulates a refrigerant to heat or cool the interior of an automobile. Such an air conditioner is configured to maintain the temperature of the automobile interior at an appropriate temperature regardless of external temperature changes so as to maintain a comfortable interior environment. In the process where the refrigerant discharged by driving a compressor circulates through a condenser, a receiver dryer, an expansion valve, and an evaporator and then returns to the compressor again, the interior of the automobile is heated or cooled by heat exchange between the condenser and the evaporator.

[0003] That is, in the cooling mode, the high-temperature and high-pressure gaseous refrigerant compressed from the compressor is condensed through the condenser, and then the temperature and humidity inside the room are lowered through evaporation in the evaporator after passing through the receiver dryer and the expansion valve.

[0004] On the other hand, recently, as the interest in energy efficiency and environmental pollution problems has increased, the development of environmentally friendly automobiles that can substantially replace internal combustion engine automobiles has been demanded. Such environmentally friendly automobiles are classified into electric automobiles driven by ordinary fuel cells or electricity as a power source, and hybrid automobiles driven by using an engine and a battery.

[0005] Among such environmentally friendly vehicles, in electric vehicles or hybrid vehicles, unlike the air conditioning devices of general vehicles, a separate heater is not used, and the air conditioning device applied to environmentally friendly vehicles is usually called a heat pump system.

[0006] On the other hand, in the case of electric vehicles powered by fuel cells, the chemical reaction energy of oxygen and hydrogen is converted into electrical energy to generate driving force. In this process, thermal energy is generated by the chemical reaction within the fuel cell, so effectively removing the generated heat is essential to ensuring the performance of the fuel cell.

[0007] In hybrid vehicles, in addition to an engine that runs on conventional fuel, the motor is driven using electricity supplied from a fuel cell or electric battery to generate driving force. However, unless the heat generated from the fuel cell, battery, and motor is effectively removed, the performance of the motor cannot be ensured.

[0008] As a result, in conventional hybrid and electric vehicles, the battery cooling system, along with the cooling system and heat pump system, must be configured in separate sealed circuits to prevent overheating of the motor, electrical components, and battery, including the fuel cell.

[0009] Therefore, a disadvantage is that the size and weight of the cooling module located at the front of the vehicle increase, and the layout of the connecting piping that supplies refrigerant or coolant to the heat pump system, cooling system, and battery cooling system inside the engine compartment becomes more complex.

[0010] Furthermore, a separate battery cooling system is provided to warm up or cool the battery depending on the vehicle's condition so that the battery can perform at its optimal level. This system utilizes multiple valves to connect to each connecting pipe, and the frequent opening and closing of these valves transmits noise and vibration into the vehicle's interior, resulting in a drawback of reduced ride comfort.

[0011] Furthermore, in order to recover waste heat from various heat sources in the vehicle's heating mode, it is necessary to install an additional heat exchanger, which has the disadvantage of increasing manufacturing costs.

[0012] The information described in this background art is prepared to enhance understanding of the background of the invention and may include information that is not prior art already known to those with ordinary skill in the art to which this art belongs. [Overview of the project] [Problems that the invention aims to solve]

[0013] This invention was made to solve the aforementioned problems, and the objective of this invention is to provide a vehicle heat pump system that uses high-temperature cooling water to heat the interior of a vehicle and reduces manufacturing costs and weight while simplifying the overall system by applying a single valve to control the flow of the cooling water.

[0014] Furthermore, the present invention aims to provide a vehicle heat pump system that can improve the speed of interior heating by forming an independent flow of cooling water for heating the vehicle interior. [Means for solving the problem]

[0015] An embodiment of the present invention provides a vehicle heat pump system comprising: a control valve having multiple ports for controlling the flow of coolant that flows into the interior; multiple coolant lines connected to the control valve through which coolant is selectively flowed by the control valve; and a radiator, electrical components, a battery, and a heater core connected to or provided in one of the multiple coolant lines, further comprising a coolant heater for independently heating the coolant flowing in two of the multiple coolant lines.

[0016] The air conditioning system further includes a compressor, condenser, first expansion valve, and evaporator interconnected through a refrigerant line through which a refrigerant flows, the air conditioning system further includes a refrigerant connection line connected to the refrigerant line through which the refrigerant flows, a chiller provided on the refrigerant connection line, and a second expansion valve, the condenser and the chiller provided on any of the plurality of cooling water lines, and the cooling water can flow selectively.

[0017] The plurality of coolant lines may include: a first coolant line with one end connected to the control valve through which coolant flows selectively; a second coolant line with one end connected to the control valve through which coolant flows selectively; a third coolant line with one end connected to the control valve through which coolant flows selectively, and the other end connected to the electrical component; a fourth coolant line with one end connected to the control valve through which coolant flows selectively, and which is equipped with the chiller; a fifth coolant line with one end connected to the control valve through which coolant flows selectively, and the other end connected to the electrical component; and a sixth coolant line with one end connected to the control valve through which coolant flows selectively, and which is equipped with a battery.

[0018] The plurality of coolant lines may further include: a seventh coolant line, one end of which is connected to the control valve, through which coolant is selectively flowed, and through which the radiator is provided; an eighth coolant line, one end of which is connected to the control valve, through which coolant is selectively flowed, and through which the heater core is provided; a tenth coolant line, one end of which is connected to the control valve, through which coolant is selectively flowed, and through which the condenser is provided; and an eleventh coolant line, one end of which is connected to the other end of the first coolant line and the other end of the seventh coolant line, and the other end of which is connected to the other end of the ninth coolant line and the other end of the tenth coolant line.

[0019] The other end of the first cooling water line is connected to the other end of the seventh cooling water line, and the other end of the second cooling water line can be connected to the fourth cooling water line between the chiller and the other end of the fourth cooling water line.

[0020] The other end of the fourth cooling water line and the other end of the eighth cooling water line can be connected to the other end of the sixth cooling water line, respectively, and the other end of the seventh cooling water line can be connected to the other end of the first cooling water line.

[0021] The cooling water heater may include a first heater provided in the sixth cooling water line, a second heater provided in the ninth cooling water line, and a control unit that controls the operation of the first heater and the second heater.

[0022] The control valve controls the flow of coolant according to at least one mode for temperature control of the vehicle interior or the battery, and the at least one mode is: a first mode for cooling the vehicle interior while using the coolant cooled by the radiator to cool the electrical components and the battery; a second mode for cooling the vehicle interior while using the coolant cooled by the radiator to cool the electrical components and using the coolant that has undergone heat exchange with the refrigerant to cool the battery; and a third mode for heating the vehicle interior while using the coolant cooled by the radiator to cool the electrical components The system may include a third mode for cooling the electrical components and the battery; a fourth mode for cooling the electrical components using coolant cooled by the radiator while heating the vehicle interior, and cooling the battery using coolant that has undergone heat exchange with the refrigerant; a fifth mode for raising the temperature of the battery using waste heat from the electrical components while heating the vehicle interior; a sixth mode for raising the temperature of the battery by recovering waste heat from the electrical components while heating the vehicle interior; and a seventh mode for raising the temperature of the battery by recovering outside air heat and waste heat from the electrical components while heating the vehicle interior.

[0023] In the first mode, the first, third, fourth, fifth, sixth, seventh, and tenth cooling water lines are opened by the control valve, the second, eighth, and ninth cooling water lines are closed by the control valve, the eleventh cooling water line is open, the third cooling water line is connected to the first cooling water line by the control valve inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve inside the control valve, the seventh cooling water line is connected to the sixth and tenth cooling water lines by the control valve inside the control valve, the refrigerant lines connecting the compressor, condenser, first expansion valve, and evaporator in the air conditioning system are opened by the first expansion valve, the refrigerant connection lines are closed by the second expansion valve, and the first expansion valve can expand the refrigerant flowing in through the refrigerant lines and supply it to the evaporator.

[0024] In the second mode, the first, third, fourth, fifth, sixth, seventh, and tenth coolant lines are opened by the control valve, the second, eighth, and ninth coolant lines are closed by the control valve, the eleventh coolant line is open, the third coolant line is connected to the first coolant line by the control valve inside the control valve, and the fourth coolant line is connected to the sixth coolant line by the control valve inside the control valve The seventh cooling water line is connected to the control valve, and inside the control valve, the seventh cooling water line is connected to the fifth cooling water line and the tenth cooling water line by the control valve, and the refrigerant line connecting the compressor, the condenser, the first expansion valve, and the evaporator in the air conditioning system is opened by the first expansion valve, and the refrigerant connection line is opened by the second expansion valve, and the first expansion valve can expand the refrigerant flowing in through the refrigerant line and supply it to the evaporator, and the second expansion valve can expand the refrigerant flowing in through the refrigerant connection line and supply it to the chiller.

[0025] In the third mode, the first, third, fourth, fifth, sixth, seventh, ninth, and tenth coolant lines are opened by the control valve, the second and eighth coolant lines are closed by the control valve, the eleventh coolant line is closed, the third coolant line is connected to the first coolant line by the control valve inside the control valve, the fourth coolant line is connected to the fifth coolant line by the control valve inside the control valve, and the seventh coolant line is The control valve connects the 6th cooling water line, and inside the control valve, the 9th cooling water line is connected to the 10th cooling water line by the control valve. In the air conditioning system, a portion of the refrigerant line connecting the compressor, the condenser, and the refrigerant connection line is opened, the remaining portion of the refrigerant line connecting the 1st expansion valve and the evaporator from the refrigerant connection line is closed by the 1st expansion valve, the refrigerant connection line is opened by the 2nd expansion valve, the operation of the 1st expansion valve is stopped, and the 2nd expansion valve can expand the refrigerant flowing in through the refrigerant connection line and supply it to the chiller.

[0026] In the case of the fourth mode, the first cooling water line, the third cooling water line, the fourth cooling water line, the fifth cooling water line, the sixth cooling water line, the seventh cooling water line, the ninth cooling water line, and the tenth cooling water line are opened by the control valve, the second cooling water line and the eighth cooling water line are closed by the control valve, the eleventh cooling water line is closed, the third cooling water line is connected to the first cooling water line by the control valve inside the control valve, the fourth cooling water line is connected to the sixth cooling water line by the control valve inside the control valve, the seventh cooling water line is connected to the fifth cooling water line by the control valve inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve inside the control valve, in the air conditioner, a part of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection line is opened, the remaining refrigerant lines connecting the first expansion valve and the evaporator from the refrigerant connection line are closed by the first expansion valve, the refrigerant connection line is opened by the second expansion valve, the operation of the first expansion valve is stopped, and the second expansion valve can expand the refrigerant flowing in through the refrigerant connection line and supply it to the chiller.

[0027] In the fifth mode, the first, second, seventh, and eighth coolant lines are closed by the control valve, the third, fourth, fifth, sixth, ninth, and tenth coolant lines are opened by the control valve, the eleventh coolant line is closed, the third coolant line is connected to the sixth coolant line by the control valve inside the control valve, and the fourth coolant line is connected to the fifth coolant line by the control valve inside the control valve. The ninth cooling water line is connected to the tenth cooling water line by the control valve inside the control valve, and in the air conditioning system, a portion of the refrigerant line connecting the compressor, the condenser, and the refrigerant connection line is opened, the remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve, the refrigerant connection line is opened by the second expansion valve, the operation of the first expansion valve is stopped, and the second expansion valve can expand the refrigerant flowing in through the refrigerant connection line and supply it to the chiller.

[0028] In the case of the sixth mode, the first cooling water line and the seventh cooling water line are closed by the control valve, the second cooling water line, the third cooling water line, the fourth cooling water line, the fifth cooling water line, the sixth cooling water line, the eighth cooling water line, the ninth cooling water line, and the tenth cooling water line are opened by the control valve, the eleventh cooling water line is closed, inside the control valve, the third cooling water line is connected to the second cooling water line by the control valve, inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve, inside the control valve, the eighth cooling water line is connected to the sixth cooling water line by the control valve, inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve, in the air conditioner, a part of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection line is opened, the remaining refrigerant lines connecting the first expansion valve and the evaporator from the refrigerant connection line are closed by the first expansion valve, the refrigerant connection line is opened by the second expansion valve, the operation of the first expansion valve is stopped, and the second expansion valve can expand the refrigerant flowing in through the refrigerant connection line and supply it to the chiller.

[0029] In the seventh mode, the first, second, third, fourth, and fifth coolant lines are opened by the control valve, the sixth, seventh, eighth, ninth, and tenth coolant lines are opened by the control valve, the eleventh coolant line is closed, the second coolant line is connected to the first coolant line by the control valve inside the control valve, the third coolant line is connected to the fourth coolant line by the control valve inside the control valve, and the seventh coolant line is connected to the fifth coolant line by the control valve inside the control valve The eighth cooling water line is connected to the sixth cooling water line by the control valve inside the control valve, and the ninth cooling water line is connected to the tenth cooling water line by the control valve inside the control valve. In the air conditioning system, some of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are open, the remaining refrigerant lines connecting the first expansion valve and the evaporator from the refrigerant connection lines are closed by the first expansion valve, the refrigerant connection lines are opened by the second expansion valve, the operation of the first expansion valve is stopped, and the second expansion valve can expand the refrigerant flowing in through the refrigerant connection lines and supply it to the chiller.

[0030] The control valve may include a first port to which one end of the first cooling water line is connected, a second port to which one end of the second cooling water line is connected, a third port to which one end of the third cooling water line is connected, and a fourth port to which one end of the fourth cooling water line is connected.

[0031] The control valve may include a fifth port to which one end of the fifth cooling water line is connected, a sixth port to which one end of the sixth cooling water line is connected, a seventh port to which one end of the seventh cooling water line is connected, an eighth port to which one end of the eighth cooling water line is connected, a ninth port to which one end of the ninth cooling water line is connected, and a tenth port to which one end of the tenth cooling water line is connected.

[0032] The system further includes at least one water pump for circulating cooling water through any of the first to tenth cooling water lines, the at least one water pump may include a first water pump provided at the fifth port, a second water pump provided at the sixth port, and a third water pump provided at the tenth port.

[0033] The seventh cooling water line may further include a reservoir tank. The air conditioning system may further include an HVAC module which has a heater core and an evaporator inside and includes an opening / closing door that adjusts the air that has passed through the evaporator due to cooling or heating of the vehicle interior to flow selectively into the heater core. [Effects of the Invention]

[0034] As described above, according to the vehicle heat pump system of the embodiment of the present invention, the interior of the vehicle is heated using high-temperature cooling water, and the overall system can be simplified by applying a single valve to control the flow of the cooling water.

[0035] Furthermore, the present invention can improve the effectiveness of interior heating by forming an independent flow of cooling water for heating the vehicle interior.

[0036] Furthermore, the present invention can selectively utilize outside air heat, waste heat from electrical components, and thermal energy generated by the refrigerant to efficiently control the temperature inside the vehicle cabin and the battery temperature. This minimizes the use of electric heaters when heating the cabin, reducing power consumption and improving overall marketability.

[0037] Furthermore, the present invention can increase the overall driving range of a vehicle by efficiently regulating the battery temperature so that the battery performs at its optimal level.

[0038] Furthermore, the present invention enables overall cost reduction and weight reduction through the simplification of the entire system, and improves space utilization by minimizing the number of components. [Brief explanation of the drawing]

[0039] [Figure 1] This is a block diagram of a vehicle heat pump system according to an embodiment of the present invention. [Figure 2] This is a diagram showing the operating state in the first mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 3] This is a diagram showing the operating state in the second mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 4] This is a diagram showing the operation state in the third mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 5] This is a diagram showing the operating state in the fourth mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 6] This is a diagram showing the operation state in the fifth mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 7] This is a diagram showing the operating state in the sixth mode of a vehicle heat pump system according to an embodiment of the present invention. [Figure 8] This is a diagram showing the operating state in the seventh mode of a vehicle heat pump system according to an embodiment of the present invention. [Modes for carrying out the invention]

[0040] The following describes in detail, based on the attached drawings, a preferred embodiment of the present invention. Prior to this, it should be understood that the embodiments and configurations shown in the drawings herein represent only one of the most preferred embodiments of the present invention and do not represent the entire technical concept of the present invention, and that there are various equivalents and modifications that can be substituted for them at the time of filing.

[0041] To clearly explain the present invention, unnecessary parts have been omitted, and the same or similar components are given the same reference numerals throughout the specification. The dimensions and thicknesses of each component shown in the drawings are arbitrary for illustrative purposes, and the present invention is not necessarily limited to those shown in the drawings. The thicknesses are enlarged to clearly represent multiple parts and regions.

[0042] Furthermore, when a specification states that a part of it "includes" a certain component, unless otherwise stated, this means that it may include other components rather than excluding them. Furthermore, terms such as "...unit," "...means," "...part," and "...component" used in the specification refer to a comprehensive structural unit in which at least one function operates.

[0043] Figure 1 is a block diagram of a vehicle heat pump system according to an embodiment of the present invention. The vehicle heat pump system according to an embodiment of the present invention utilizes high-temperature cooling water to heat the interior of a vehicle and, by applying a single control valve 100 to control the flow of the cooling water, the overall system can be simplified while reducing the manufacturing cost and weight. Furthermore, the present invention can improve the speed of interior heating by forming an independent flow of cooling water for heating the vehicle interior.

[0044] Referring to Figure 1, in the heat pump system according to an embodiment of the present invention, the radiator 11 through which the cooling water flows, the electrical components 13, the battery 15, and the heater core 17, and the air conditioning unit 20 through which the refrigerant circulates, can be interconnected via a condenser 24 and a chiller 30.

[0045] First, the air conditioning unit 20 may include a refrigerant line 21 through which the refrigerant flows, and a compressor 22, an HVAC module 23, a condenser 24, a first expansion valve 25, and an evaporator 26 interconnected through the refrigerant line 21.

[0046] The compressor 22 can compress the incoming refrigerant and cause it to flow into the refrigerant line 21 so that the refrigerant flows along the refrigerant line 21. The HVAC module 23 may include an evaporator 26 connected to the compressor 22 via a refrigerant line 21, and a heater core 17 to which high-temperature cooling water is selectively supplied.

[0047] Here, the HVAC module 23 can be equipped with an opening / closing door 23a inside that adjusts the outside air that has passed through the evaporator 26 to flow selectively into the heater core 17 between the evaporator 26 and the heater core 17. Such an opening and closing door 23a is opened when the vehicle interior is being heated, allowing outside air that has passed through the evaporator 26 to flow into the heater core 17. In other words, the high-temperature cooling water supplied to the heater core 17 can raise the temperature of the outside air passing through the heater core 17. That is, the incoming outside air is converted to a high-temperature state as it passes through the heater core 17 and flows into the vehicle interior, thereby providing heating to the vehicle interior.

[0048] Conversely, when the vehicle interior is being air-conditioned, the opening and closing door 23a closes the heater core 17 side so that the outside air cooled as it passes through the evaporator 26 flows directly into the vehicle interior. As a result, the outside air passing through the evaporator 26 is cooled by the low-temperature refrigerant supplied to the evaporator 26 as it passes through. The cooled outside air then flows into the vehicle's interior, thereby cooling the interior of the vehicle.

[0049] On the other hand, although not shown in the figures, the HVAC module 23 may further include an air heater. The air heater may be positioned behind the heater core 17, from inside the HVAC module 23 toward the vehicle's interior, to selectively heat the outside air that has passed through the heater core 17.

[0050] In this embodiment, the condenser 24 can be connected to the compressor 22 through a refrigerant line 21. Such a condenser 24 can condense the refrigerant supplied from the compressor 22 using selectively flowing cooling water.

[0051] The first expansion valve 25 is provided in the refrigerant line 21 connecting the condenser 24 and the evaporator 26. The first expansion valve 25 can selectively expand the incoming refrigerant. Such a first expansion valve 25 can be a mechanical expansion valve that expands the refrigerant that flows in through the refrigerant line 21.

[0052] On the other hand, in this embodiment, the first expansion valve 25 is described as a mechanical expansion valve, but the invention is not limited to this, and the first expansion valve 25 can be an electronic expansion valve that selectively expands the supplied refrigerant while controlling the flow of the refrigerant. The evaporator 26 can be provided in the refrigerant line 21 between the first expansion valve 25 and the compressor 22.

[0053] Such an evaporator 26 can evaporate the expanded refrigerant supplied to the first expansion valve 25 through heat exchange with the air passing through the HVAC module 23.

[0054] Here, the air conditioning unit 20 may further include a chiller 30, a refrigerant connection line 31, and a second expansion valve 33. The chiller 30 can be provided in the refrigerant connection line 31. Here, cooling water can be selectively circulated through the chiller 30. The chiller 30 configured in this way can regulate the temperature of the cooling water by exchanging heat with the cooling water that is selectively introduced, while the refrigerant flowing into the refrigerant connection line 31 is also present.

[0055] More specifically, the chiller 30 can regulate the temperature of the cooling water by exchanging heat between the supplied refrigerant and the cooling water. Such a chiller 30 can be a water-cooled heat exchanger that exchanges heat between the refrigerant flowing into it and the cooling water. Here, one end of the refrigerant connection line 31 is connected to the refrigerant line 21 between the condenser 24 and the first expansion valve 25. The other end of such a refrigerant connection line 31 can be connected to the refrigerant line 21 between the evaporator 26 and the compressor 22. In other words, the chiller 30 can regulate the temperature of the cooling water by selectively exchanging heat between the cooling water and the refrigerant that flows into it.

[0056] The second expansion valve 33 can be positioned at the front end of the chiller 30, with reference to the flow direction of the refrigerant flowing along the refrigerant connection line 31, so that it flows in before the refrigerant is supplied to the chiller 30. Such a second expansion valve 33 can be an electronic expansion valve that selectively expands the supplied refrigerant while controlling the flow of the refrigerant.

[0057] In other words, the front end of the chiller 30 can be set based on the direction of refrigerant flow. Based on the direction in which the refrigerant flows along the refrigerant connection line 31, the position where the refrigerant flows into the chiller 30 can be defined as the front end of the chiller 30, and the position where the refrigerant is discharged from the chiller 30 can be defined as the rear end of the chiller 30.

[0058] Furthermore, the heat pump system according to the embodiment of the present invention may further include a control valve 100 and a plurality of cooling water lines. The control valve 100 controls the flow of coolant that flows into the interior according to at least one mode for temperature control of the vehicle interior or the battery 15, and multiple ports may be formed. The detailed configuration of the aforementioned multiple ports will be explained in more detail below.

[0059] The aforementioned multiple cooling water lines are connected to a control valve 100, and the cooling water can be selectively flowed by the control valve 100. In this embodiment, the radiator 11, electrical components 13, battery 15, and heater core 17 may be connected to or included in any of the coolant lines of the plurality of coolant lines.

[0060] Furthermore, the condenser 24 and chiller 30 are provided in one of the cooling water lines of the plurality of cooling water lines, allowing the cooling water to flow selectively. Here, the plurality of lines may include a first coolant line 101, a second coolant line 102, a third coolant line 103, a fourth coolant line 104, a fifth coolant line 105, a sixth coolant line 106, a seventh coolant line 107, an eighth coolant line 108, a ninth coolant line 109, a tenth coolant line 110, and an eleventh coolant line 111.

[0061] One end of the first cooling water line 101 is connected to a control valve 100, allowing the cooling water to flow selectively. One end of the second cooling water line 102 is connected to a control valve 100, allowing the cooling water to flow selectively. One end of the third coolant line 103 is connected to a control valve 100, allowing the coolant to flow selectively. The other end of this third coolant line 103 can be connected to an electrical component 13.

[0062] Here, the electrical component 13 may include an Electric Power Control Unit (EPCU), an inverter, an On-Board Charger (OBC), or an autonomous driving controller. The electrical components 13 configured in this way are connected to the third cooling water line 103 and can be cooled by water cooling.

[0063] One end of the fourth cooling water line 104 is connected to a control valve 100, allowing for selective flow of cooling water. Such a fourth cooling water line 104 may include a chiller 30. Here, the chiller 30 can exchange heat with the refrigerant supplied from the second expansion valve 33 through the refrigerant connection line 31, while the cooling water flowing in the fourth cooling water line 104 is flowing through the refrigerant connection line 31. The chiller 30 configured in this way can be a water-cooled heat exchanger into which cooling water flows through the fourth cooling water line 104.

[0064] In this embodiment, one end of the fifth coolant line 105 is connected to a control valve 100, allowing the coolant to flow selectively. The other end of this fifth coolant line 105 can be connected to an electrical component 13.

[0065] One end of the sixth coolant line 106 is connected to a control valve 100, allowing for selective flow of coolant. A battery 15 may be provided in such a sixth coolant line 106. As a result, the battery 15 can be connected to the sixth cooling water line 106 and cooled by water.

[0066] In this embodiment, one end of the seventh coolant line 107 is connected to a control valve 100, allowing for selective flow of coolant. A radiator 11 may be included in such a seventh coolant line 107. The radiator 11 can be positioned at the front of the vehicle. A cooling fan (not shown) is provided behind the radiator 11. This allows the radiator 11 to cool the coolant through the operation of the cooling fan and heat exchange with the outside air.

[0067] On the other hand, the seventh coolant line 107 may further be equipped with a reservoir tank 12. The reservoir tank 12 can store the coolant cooled by the radiator 11.

[0068] One end of the eighth cooling water line 108 is connected to a control valve 100, allowing the cooling water to flow selectively.

[0069] One end of the ninth cooling water line 109 is connected to a control valve 100, allowing the cooling water to flow selectively. Such a ninth cooling water line 109 may be equipped with a heater core 17. As a result, when heating the vehicle interior, high-temperature coolant can flow into the heater core 17 through the ninth coolant line 109.

[0070] In this embodiment, one end of the tenth cooling water line 110 is connected to a control valve 100, allowing for selective flow of cooling water. Such a tenth cooling water line 110 may include a condenser 24. As a result, the condenser 24 can condense the refrigerant supplied from the compressor 22 to the refrigerant line 21 while exchanging heat with the cooling water supplied from the 10th cooling water line 110, and at the same time raise the temperature of the cooling water.

[0071] Furthermore, one end of the 11th cooling water line 111 can be connected to the other end of the first cooling water line 101 and the other end of the 7th cooling water line 107. The other end of such the 11th cooling water line 111 can be connected to the other end of the 9th cooling water line 109 and the other end of the 10th cooling water line 110.

[0072] Here, the other end of the first cooling water line 101 can be connected to the other end of the seventh cooling water line 107. The other end of the second cooling water line 102 can be connected to the fourth cooling water line 104 between the chiller 30 and the other end of the fourth cooling water line 104. The other end of the fourth cooling water line 104 and the other end of the eighth cooling water line 108 can be connected to the other end of the sixth cooling water line 106, respectively. The other end of the seventh cooling water line 107 can be connected to the other end of the first cooling water line 101.

[0073] On the other hand, the control valve 100 may include a first port (P1), a second port (P2), a third port (P3), a fourth port (P4), a fifth port (P5), a sixth port (P6), a seventh port (P7), an eighth port (P8), a ninth port (P9), and a tenth port (P10).

[0074] One end of the first cooling water line 101 can be connected to the first port (P1). One end of the second cooling water line 102 can be connected to the second port (P2). One end of the third cooling water line 103 can be connected to the third port (P3). One end of the fourth coolant line 104 can be connected to the fourth port (P4). One end of the fifth coolant line 105 can be connected to the fifth port (P5). One end of the sixth coolant line 106 can be connected to the sixth port (P6).

[0075] One end of the seventh coolant line 107 can be connected to the seventh port (P7). One end of the eighth coolant line 108 can be connected to the eighth port (P8). One end of the ninth coolant line 109 can be connected to the ninth port (P9). Furthermore, one end of the tenth cooling water line 110 can be connected to the tenth port (P10).

[0076] Here, the control valve 100 may be equipped with at least one water pump so that cooling water flows through any of the first to tenth cooling water lines 101, 102, 103, 104, 105, 106, 107, 108, 109, and 110. In this embodiment, the at least one water pump may include a first water pump 120 provided at the fifth port (P5), a second water pump 130 provided at the sixth port (P6), and a third water pump 140 provided at the tenth port (P10). The first, second, and third water pumps 120, 130, and 140 can be electrically powered water pumps.

[0077] On the other hand, the heat pump system may further include a cooling water heater 70 that independently heats the cooling water flowing through two selected cooling water lines from among the plurality of cooling water lines. More specifically, the cooling water heater 70 can be provided in the sixth cooling water line 106 and the ninth cooling water line 109. Here, the cooling water heater 70 may include a first heater 72, a second heater 74, and a control unit 76.

[0078] The first heater 72 may be provided in the sixth cooling water line 106. Such a first heater 72 can selectively heat the cooling water so that the temperature of the cooling water flowing in through the sixth cooling water line 106 rises. A second heater 74 may be provided in the ninth cooling water line 109. Such a second heater 74 can selectively heat the cooling water so that the temperature of the cooling water flowing in through the ninth cooling water line 109 rises.

[0079] Here, the first heater 72 and the second heater 74 can be configured as a single unit. Furthermore, the cooling water passing through the first heater 72 and the second heater 74, respectively, is not mixed with each other, thereby preventing heat transfer between them. The control unit 76 can be provided on one side of the first heater 72 and the second heater 74. Such a control unit 76 can control the operation of the first heater 72 and the second heater 74.

[0080] The heat pump system configured in this way can control the flow of coolant by the control valve 100 according to at least one mode for regulating the temperature inside the vehicle or the temperature of the battery 15.

[0081] Here, at least one mode may include a first mode, a second mode, a third mode, a fourth mode, a fifth mode, a sixth mode, and a seventh mode. First, in the aforementioned first mode, the vehicle interior is cooled while the coolant cooled by the radiator 11 is used to cool the electrical components 13 and the battery 15. The second mode allows the vehicle interior to be air-conditioned while the coolant cooled by the radiator 11 is used to cool the electrical components 13, and the coolant that has undergone heat exchange with the refrigerant is used to cool the battery 15.

[0082] In the third mode, the vehicle interior is heated while the electrical components 13 and the battery 15 are cooled using the coolant cooled by the radiator 11. In the aforementioned fourth mode, the vehicle interior is heated while the electrical components 13 are cooled using the coolant cooled by the radiator 11, and the battery 15 is cooled using the coolant that has undergone heat exchange with the refrigerant.

[0083] The fifth mode allows the battery 15 to be heated using the waste heat from the electrical components 13 while simultaneously heating the vehicle interior. The sixth mode allows the vehicle interior to be heated while recovering waste heat from the electrical components 13 and raising the temperature of the battery 15. Furthermore, the seventh mode can heat the vehicle interior while recovering heat from the outside air and waste heat from the electrical components 13, thereby raising the temperature of the battery 15.

[0084] The operation and function of the heat pump system according to the embodiment of the present invention configured in this manner will be described in detail with reference to the attached Figures 2 to 8. First, the operation of the first mode, which uses the coolant cooled by the radiator 11 to cool the electrical components 13 and the battery 15 while the vehicle interior is air-conditioned, will be explained with reference to Figure 2.

[0085] Figure 2 is a diagram showing the operating state of a vehicle heat pump system according to an embodiment of the present invention in the first mode. Referring to Figure 2, in the first mode, the heat pump system can cool the vehicle interior while using the coolant cooled by the radiator 11 to cool the electrical components 13 and the battery 15. First, in order to cool the interior of the vehicle, the compressor 22 operates so that the refrigerant flows along the refrigerant line 21. The refrigerant line 21 can be opened by the first expansion valve 25 so that the compressor 22, condenser 24, first expansion valve 25, and evaporator 26 are interconnected. Simultaneously, the refrigerant connection line 31 can be closed by the second expansion valve 33.

[0086] On the other hand, the first coolant line 101, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the seventh coolant line 107, and the tenth coolant line 110 can be opened by the control valve 100. Simultaneously, the second cooling water line 102, the eighth cooling water line 108, and the ninth cooling water line 109 can be closed by the control valve 100. Then, the 11th cooling water line 111 can be opened.

[0087] At this time, the third cooling water line 103 can be connected to the first cooling water line 101 by the control valve 100 inside the control valve 100. Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the fifth cooling water line 105 by the control valve 100. Then, inside the control valve 100, the seventh cooling water line 107 can be connected to the sixth cooling water line 106 and the tenth cooling water line 110 by the control valve 100.

[0088] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the cooling water flowed by the first water pump 120 from the fifth port (P5) of the control valve 100 along the fifth cooling water line 105 flows into the electrical component 13. The coolant that has passed through the electrical component 13 flows into the third coolant line 103 and can flow into the control valve 100 through the third port (P3). The cooling water that flows into the third port (P3) can flow along the first cooling water line 101, which is connected to the first port (P1) by the control valve 100.

[0089] Meanwhile, the cooling water flowing along the 10th cooling water line 110, which is opened from the 10th port (P10) of the control valve 100 by the 3rd water pump 140, can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 by exchanging heat with the cooling water flowing through the 10th cooling water line 110. The refrigerant condensed in the condenser 24 can flow into the first expansion valve 25 along the refrigerant line 21.

[0090] Meanwhile, the cooling water that has passed through the condenser 24 can flow along the 10th cooling water line 110 and the 11th cooling water line 111. As a result, the cooling water flowing into the first cooling water line 101 can flow into the seventh cooling water line 107 together with the cooling water flowing into the eleventh cooling water line 111. The coolant flowing into the seventh coolant line 107 can be cooled through heat exchange with the outside air as it passes through the radiator 11. The coolant cooled in the radiator 11 then flows into the control valve 100 through the seventh port (P7).

[0091] Here, of the cooling water that flows into the control valve 100 through the seventh port (P7), some of the cooling water can be directed to the sixth port (P6) by the control valve 100. Then, of the cooling water that flows into the control valve 100 through the seventh port (P7), the remaining cooling water can be flowed to the tenth port (P10) by the control valve 100.

[0092] Meanwhile, the cooling water flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth cooling water line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 may be deactivated by the control unit 76. The cooling water flowing from the cooling water heater 70 along the sixth cooling water line 106 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the sixth cooling water line 106. At this time, the cooling water can flow without heat exchange as it passes through the chiller 30, which is not supplied with refrigerant.

[0093] The cooling water that has passed through the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed by the control valve 100 to the fifth port (P5), and then to the fifth cooling water line 105 connected to the fifth port (P5), allowing the aforementioned process to be repeated.

[0094] By repeatedly performing this operation, the coolant cooled by the radiator 11 cools the electrical components 13 and the battery 15, and condenses the refrigerant supplied to the condenser 24. Here, the coolant cooled by the radiator 11 first passes through the battery 15 via the control valve 100, and then can pass through the electrical components 13. As a result, the coolant cooled by the radiator 11 first cools the battery 15, and then the electrical components 13, thereby allowing the battery 15 to be cooled quickly and efficiently.

[0095] Meanwhile, the refrigerant condensed in the condenser 24 flows into the first expansion valve 25 along the refrigerant line 21. Here, the first expansion valve 25 expands the refrigerant flowing in through the refrigerant line 21 and can supply the expanded refrigerant to the evaporator 26 through the refrigerant line 21. As a result, a low-temperature refrigerant is supplied to the evaporator 26. In this state, the outside air flowing into the HVAC module 23 is cooled as it passes through the evaporator 26 by the low-temperature refrigerant that has flowed into the evaporator 26.

[0096] At this time, the opening and closing door 23a closes the portion that passes through the heater core 17 so that the cooled outside air does not pass through the heater core 17. Therefore, the cooled outside air flows directly into the interior of the vehicle, allowing the interior of the vehicle to be cooled smoothly.

[0097] In this embodiment, the operation in the second mode, which involves cooling the electrical components 13 using the coolant cooled by the radiator 11 while cooling the vehicle interior, and cooling the battery 15 using the coolant that has undergone heat exchange with the refrigerant, will be explained with reference to the attached Figure 3. Figure 3 shows the operating state of a vehicle heat pump system according to an embodiment of the present invention, in the second mode.

[0098] Referring to Figure 3, in the second mode, the heat pump system can cool the vehicle interior while using the coolant cooled by the radiator 11 to cool the electrical components 13 and using the coolant that has undergone heat exchange with the refrigerant to cool the battery 15. First, in order to cool the interior of the vehicle, the compressor 22 operates so that the refrigerant flows along the refrigerant line 21. The refrigerant line 21 can be opened by the first expansion valve 25 so that the compressor 22, condenser 24, first expansion valve 25, and evaporator 26 are interconnected. Simultaneously, the refrigerant connection line 31 can be opened by the second expansion valve 33.

[0099] On the other hand, the first coolant line 101, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the seventh coolant line 107, and the tenth coolant line 110 can be opened by the control valve 100. Simultaneously, the second cooling water line 102, the eighth cooling water line 108, and the ninth cooling water line 109 can be closed by the control valve 100. Then, the 11th cooling water line 111 can be opened.

[0100] At this time, the third cooling water line 103 can be connected to the first cooling water line 101 by the control valve 100 inside the control valve 100. Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the sixth cooling water line 106 by the control valve 100. Inside the control valve 100, the seventh cooling water line 107 can be connected to the fifth cooling water line 105 and the tenth cooling water line 110 by the control valve 100.

[0101] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13. The coolant that has passed through the electrical component 13 flows into the third coolant line 103 and can flow into the control valve 100 through the third port (P3). The cooling water that flows into the third port (P3) can flow along the first cooling water line 101, which is connected to the first port (P1) by the control valve 100.

[0102] Meanwhile, the cooling water flowing along the 10th cooling water line 110, which is opened from the 10th port (P10) of the control valve 100 by the 3rd water pump 140, can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the 10th cooling water line 110. The refrigerant condensed in the condenser 24 can flow into the first expansion valve 25 along the refrigerant line 21.

[0103] Meanwhile, the cooling water that has passed through the condenser 24 can flow along the 10th cooling water line 110 and the 11th cooling water line 111. As a result, the cooling water flowing into the first cooling water line 101 can flow into the seventh cooling water line 107 together with the cooling water flowing into the eleventh cooling water line 111.

[0104] The coolant flowing into the seventh coolant line 107 can be cooled through heat exchange with the outside air as it passes through the radiator 11. The coolant cooled in the radiator 11 then flows into the control valve 100 through the seventh port (P7). Here, of the cooling water that flows into the control valve 100 through the seventh port (P7), some of the cooling water can be directed to the fifth port (P5) by the control valve 100.

[0105] Then, of the cooling water that flows into the control valve 100 through the seventh port (P7), the remaining cooling water can be flowed to the tenth port (P10) by the control valve 100. By repeatedly performing this operation, the coolant cooled by the radiator 11 can cool the electrical components 13 and condense the refrigerant supplied to the condenser 24.

[0106] Meanwhile, the cooling water flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth cooling water line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 may be deactivated by the control unit 76.

[0107] The cooling water flowing from the cooling water heater 70 along the sixth cooling water line 106 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the sixth cooling water line 106. Here, some of the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the second expansion valve 33 can expand the refrigerant that has flowed in through the refrigerant connection line 31 and supply it to the chiller 30.

[0108] As a result, low-temperature refrigerant can flow into the chiller 30 through the refrigerant connection line 31. The low-temperature refrigerant flowing into the chiller 30 can cool the cooling water flowing along the fourth cooling water line 104 by exchanging heat with the cooling water that flows in from the battery 15 through the sixth cooling water line 106 and the fourth cooling water line 104.

[0109] The cooling water cooled by the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed to the sixth port (P6) by the control valve 100, allowing the aforementioned process to be repeated.

[0110] In other words, the cooling water cooled in the chiller 30 can be supplied to the battery 15 along the sixth cooling water line 106 connected to the sixth port (P6) by the control valve 100. This allows the battery 15 to be efficiently cooled by the cooling water cooled in the chiller 30 through heat exchange with the refrigerant.

[0111] Meanwhile, of the refrigerant condensed in the condenser 24, the remaining refrigerant flows into the first expansion valve 25 along the refrigerant line 21. Here, the first expansion valve 25 expands the refrigerant that has flowed in through the refrigerant line 21 and can supply the expanded refrigerant to the evaporator 26 through the refrigerant line 21. As a result, a low-temperature refrigerant is supplied to the evaporator 26. In this state, the outside air flowing into the HVAC module 23 is cooled as it passes through the evaporator 26 by the low-temperature refrigerant that has flowed into the evaporator 26.

[0112] At this time, the front opening / closing door 23a closes the portion that passes through the heater core 17 so that the cooled outside air does not pass through the front heater core 17. Therefore, the cooled outside air flows directly into the interior of the vehicle, allowing the interior of the vehicle to be cooled smoothly.

[0113] In this embodiment, the operation in the third mode, which uses the coolant cooled by the radiator 11 to cool the electrical components 13 and the battery 15 while heating the vehicle interior, will be explained with reference to the attached Figure 4. Figure 4 shows an operating state diagram of a vehicle heat pump system according to an embodiment of the present invention, in the third mode.

[0114] Referring to Figure 4, in the third mode, the heat pump system can heat the vehicle interior while using the coolant cooled by the radiator 11 to cool the electrical components 13 and the battery 15. First, in order to heat the vehicle interior, the compressor 22 is operated so that the refrigerant flows along the refrigerant line 21. In this air conditioning unit 20, the compressor 22, the condenser 24, and a portion of the refrigerant line 21 connecting one end of the refrigerant connection line 31 can be opened.

[0115] Simultaneously, the remaining refrigerant line 21, which connects one end of the refrigerant connection line 31 to the other end of the refrigerant connection line 31 via the first expansion valve 25 and the evaporator 26, can be closed by the first expansion valve 25. At this point, the operation of the first expansion valve 25 can be stopped. Furthermore, the refrigerant connection line 31 can be opened by the second expansion valve 33.

[0116] On the other hand, the first coolant line 101, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the seventh coolant line 107, the ninth coolant line 109, and the tenth coolant line 110 can be opened by the pre-control valve 100. Simultaneously, the second cooling water line 102 and the eighth cooling water line 108 can be closed by the control valve 100. Then, the 11th cooling water line 111 can be closed.

[0117] At this time, the third cooling water line 103 can be connected to the first cooling water line 101 by the control valve 100 inside the control valve 100. Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the fifth cooling water line 105 by the control valve 100.

[0118] Furthermore, within the control valve 100, the seventh cooling water line 107 can be connected to the sixth cooling water line 106 by the control valve 100. Then, inside the control valve 100, the ninth cooling water line 109 can be connected to the tenth cooling water line 110 by the control valve 100.

[0119] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13.

[0120] The coolant that has passed through the electrical component 13 flows into the third coolant line 103 and can flow into the control valve 100 through the third port (P3). The cooling water that flows into the third port (P3) can be flowed along the first cooling water line 101, which is connected to the first port (P1) by the control valve 100. The cooling water that has flowed through the first cooling water line 101 then flows into the seventh cooling water line 107.

[0121] The coolant flowing into the seventh coolant line 107 can pass through the radiator 11 and be cooled through heat exchange with the outside air. The coolant cooled in the radiator 11 then flows into the control valve 100 through the seventh port (P7). Here, the cooling water that flows into the control valve 100 through the seventh port (P7) can be directed by the control valve 100 to the sixth port (P6). The cooling water flowed from the seventh port (P7) to the sixth port (P6) by the control valve 100 is then flowed by the second water pump 130 either through the sixth port (P6) of the control valve 100 or along the sixth cooling water line 106.

[0122] The coolant flowing into the sixth coolant line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 may be deactivated by the control unit 76. The cooling water flowing from the cooling water heater 70 along the sixth cooling water line 106 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the sixth cooling water line 106.

[0123] Here, the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the second expansion valve 33 can expand the refrigerant that has flowed in through the refrigerant connection line 31 and supply it to the chiller 30. The chiller 30 can evaporate the refrigerant that flows in through heat exchange with the cooling water. The refrigerant evaporated in the chiller 30 is supplied to the compressor 22 along the refrigerant connection line 31 and some of the refrigerant lines 21, allowing the aforementioned process to be repeated.

[0124] Meanwhile, the cooling water that has passed through the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed by the control valve 100 to the fifth port (P5), and then to the fifth cooling water line 105 connected to the fifth port (P5), allowing the aforementioned process to be repeated.

[0125] By repeatedly performing this operation, the coolant cooled by the radiator 11 can cool the electrical components 13 and the battery 15. Here, the coolant cooled by the radiator 11 can pass through the battery 15 first via the control valve 100, and then through the electrical components 13. As a result, the coolant cooled by the radiator 11 cools the battery 15 first, and then the electrical components 13, allowing the battery 15 to be cooled quickly and efficiently.

[0126] Meanwhile, the cooling water flowed by the third water pump 140 from the 10th port (P10) of the control valve 100 along the 10th cooling water line 110 can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the 10th cooling water line 110.

[0127] The refrigerant condensed in the condenser 24 can flow along the refrigerant line 21 and into the open refrigerant connection line 31. On the other hand, the condenser 24 can raise the temperature of the cooling water by exchanging heat with the high-temperature refrigerant supplied from the compressor 22 while the cooling water flows in through the 10th cooling water line 110.

[0128] The cooling water, whose temperature has risen after passing through the condenser 24, can then flow into the heater core 17 after passing through the second heater 74 of the cooling water heater 70 along the ninth cooling water line 109, which is connected to the tenth cooling water line 110. Here, the second heater 74 can be activated when the temperature of the cooling water flowing into the ninth cooling water line 109 is low.

[0129] In other words, the second heater 74 can be operated by the control unit 76 to raise the temperature of the cooling water when the temperature of the cooling water flowing through the ninth cooling water line 109 is below the set temperature. This allows the temperature of the cooling water supplied to the heater core 17 to rise rapidly when the second heater 74 is activated.

[0130] Here, the opening and closing door 23a is opened so that outside air that has flowed into the HVAC module 23 and passed through the evaporator 26 can pass through the heater core 17. As a result, outside air flowing in from the outside passes through the evaporator 26, which is not supplied with refrigerant, and enters at room temperature without being cooled. The incoming outside air is converted to a high temperature as it passes through the heater core 17 and enters the vehicle interior, thereby providing heating to the vehicle interior.

[0131] Meanwhile, the cooling water that has passed through the heater core 17 flows into the ninth cooling water line 109 and can flow into the ninth port (P9). The cooling water that has flowed into the ninth port (P9) flows along the tenth cooling water line 110, which is connected to the tenth port (P10) by the control valve 100, and the above process can be repeated. In other words, the third mode efficiently cools the electrical components 13 and battery 15 using the coolant cooled by the radiator 11, and heats the vehicle interior using the coolant that has undergone heat exchange with the refrigerant in the condenser 24.

[0132] Furthermore, in the third mode, the control valve 100 circulates the cooling water independently of the ninth cooling water line 109 and the tenth cooling water line 110 for heating the vehicle interior, thereby improving the speed of heating.

[0133] In this embodiment, the fourth mode of operation, in which the vehicle interior is heated while the electrical components 13 are cooled using the coolant cooled by the radiator 11, and the battery 15 is cooled using the coolant that has undergone heat exchange with the refrigerant, will be explained with reference to the attached Figure 5. Figure 5 shows the operating state of a vehicle heat pump system according to an embodiment of the present invention, in the fourth mode. Referring to Figure 5, in the fourth mode, the heat pump system can heat the vehicle interior while using the coolant cooled by the radiator 11 to cool the electrical components 13 and using the coolant that has undergone heat exchange with the refrigerant to cool the battery 15.

[0134] First, in order to heat the vehicle interior, the compressor 22 is operated so that the refrigerant flows along the refrigerant line 21. In this configuration, the air conditioning unit 20 allows for the opening of a portion of the refrigerant line 21 that connects the compressor 22, the condenser 24, and one end of the refrigerant connection line 31. Simultaneously, the remaining refrigerant line 21, which connects one end of the refrigerant connection line 31 to the other end of the refrigerant connection line 31 via the first expansion valve 25 and the evaporator 26, can be closed by the first expansion valve 25. At this point, the operation of the first expansion valve 25 can be stopped. Furthermore, the refrigerant connection line 31 can be opened by the second expansion valve 33.

[0135] On the other hand, the first coolant line 101, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the seventh coolant line 107, the ninth coolant line 109, and the tenth coolant line 110 can be opened by the control valve 100. Simultaneously, the second cooling water line 102 and the eighth cooling water line 108 can be closed by the control valve 100.

[0136] Then, the 11th cooling water line 111 can be closed. At this time, the third cooling water line 103 can be connected to the first cooling water line 101 by the control valve 100 inside the control valve 100. Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the sixth cooling water line 106 by the control valve 100. Furthermore, within the control valve 100, the seventh cooling water line 107 can be connected to the fifth cooling water line 105 by the control valve 100. Then, inside the control valve 100, the ninth cooling water line 109 can be connected to the tenth cooling water line 110 by the control valve 100.

[0137] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13. The coolant that has passed through the electrical component 13 flows into the third coolant line 103 and can flow into the control valve 100 through the third port (P3).

[0138] The cooling water that flows into the third port (P3) can be flowed along the first cooling water line 101, which is connected to the first port (P1) by the control valve 100. The cooling water that has flowed through the first cooling water line 101 then flows into the seventh cooling water line 107. The coolant flowing into the seventh coolant line 107 can be cooled through heat exchange with the outside air as it passes through the radiator 11. The coolant cooled in the radiator 11 then flows into the control valve 100 through the seventh port (P7).

[0139] Here, the cooling water that flows into the control valve 100 through the seventh port (P7) can be directed by the control valve 100 to the fifth port (P5). By repeatedly performing this operation, the coolant cooled by the radiator 11 can cool the electrical components 13.

[0140] Meanwhile, the cooling water flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth cooling water line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 may be deactivated by the control unit 76.

[0141] The cooling water flowing from the cooling water heater 70 along the sixth cooling water line 106 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the sixth cooling water line 106. Here, the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the second expansion valve 33 can expand the refrigerant that has flowed in through the refrigerant connection line 31 and supply it to the chiller 30. As a result, low-temperature refrigerant can flow into the chiller 30 through the refrigerant connection line 31.

[0142] The low-temperature refrigerant flowing into the chiller 30 can cool the cooling water flowing along the fourth cooling water line 104 while exchanging heat with the cooling water flowing in from the battery 15 through the sixth cooling water line 106 and the fourth cooling water line 104. Simultaneously, the chiller 30 can evaporate the refrigerant that has flowed in through heat exchange with the cooling water. The refrigerant evaporated in the chiller 30 is supplied to the compressor 22 along the refrigerant connection line 31 and some of the refrigerant lines 21, allowing the aforementioned process to be repeated.

[0143] Meanwhile, the cooling water cooled by the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed through the sixth port (P6) by the control valve 100, allowing the aforementioned process to be repeated. In other words, the cooling water cooled in the chiller 30 can be supplied to the battery 15 along the sixth cooling water line 106 connected to the sixth port (P6) by the control valve 100. This allows the battery 15 to be efficiently cooled by the cooling water cooled in the chiller 30 through heat exchange with the refrigerant.

[0144] The cooling water that has passed through the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed by the control valve 100 to the sixth port (P6), and as it flows into the sixth cooling water line 106 connected to the sixth port (P6), the aforementioned process can be repeated.

[0145] Meanwhile, the cooling water flowed by the third water pump 140 from the 10th port (P10) of the control valve 100 along the 10th cooling water line 110 can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the tenth cooling water line 110.

[0146] The refrigerant condensed in the condenser 24 can flow along the refrigerant line 21 and into the open refrigerant connection line 31. On the other hand, the condenser 24 can raise the temperature of the cooling water by exchanging heat with the high-temperature refrigerant supplied from the compressor 22 while the cooling water flows in through the 10th cooling water line 110.

[0147] The cooling water, whose temperature has risen after passing through the condenser 24, can then flow into the heater core 17 after passing through the second heater 74 of the cooling water heater 70 along the ninth cooling water line 109, which is connected to the tenth cooling water line 110. Here, the second heater 74 can be activated when the temperature of the cooling water flowing into the ninth cooling water line 109 is low.

[0148] In other words, the second heater 74 can be operated by the control unit 76 to raise the temperature of the cooling water when the temperature of the cooling water flowing through the ninth cooling water line 109 is below the set temperature. This allows the temperature of the cooling water supplied to the heater core 17 to rise rapidly when the second heater 74 is activated.

[0149] Here, the opening and closing door 23a is opened so that outside air that has flowed into the HVAC module 23 and passed through the evaporator 26 can pass through the heater core 17. As a result, outside air flowing in from the outside enters the evaporator 26, which is not supplied with refrigerant, at room temperature without being cooled. The incoming outside air is converted to a high-temperature state as it passes through the heater core 17 and then flows into the vehicle interior, thereby providing heating to the vehicle interior.

[0150] Meanwhile, the cooling water that has passed through the heater core 17 flows into the ninth cooling water line 109 and can flow into the ninth port (P9). The cooling water that has flowed into the ninth port (P9) flows along the tenth cooling water line 110, which is connected to the tenth port (P10) by the control valve 100, and the above process can be repeated.

[0151] In other words, the fourth mode can efficiently cool the electrical components 13 using the coolant cooled by the radiator 11, and cool the battery 15 using the coolant cooled by the chiller 30 through heat exchange with the refrigerant. Simultaneously, the fourth mode can heat the vehicle interior using the cooling water that has undergone heat exchange with the refrigerant in the condenser 24.

[0152] Furthermore, in the fourth mode, the control valve 100 circulates the cooling water independently of the ninth cooling water line 109 and the tenth cooling water line 110 for heating the vehicle interior, thereby improving the speed of heating.

[0153] In this embodiment, the operation in the fifth mode, which uses the waste heat from the electrical components 13 to raise the temperature of the battery 15 while heating the vehicle interior, will be explained with reference to the attached Figure 6. Figure 6 shows the operating state of a vehicle heat pump system according to an embodiment of the present invention, in the fifth mode. Referring to Figure 6, in the fifth mode, the heat pump system can heat the vehicle interior while utilizing the waste heat from the electrical components 13 to raise the temperature of the battery 15.

[0154] First, in order to heat the vehicle interior, the compressor 22 is operated so that the refrigerant flows along the refrigerant line 21. In this air conditioning unit 20, the compressor 22, the condenser 24, and a portion of the refrigerant line 21 connecting one end of the refrigerant connection line 31 can be opened. Simultaneously, the remaining refrigerant line 21, which connects one end of the refrigerant connection line 31 to the other end of the refrigerant connection line 31 via the first expansion valve 25 and the evaporator 26, can be closed by the first expansion valve 25. At this point, the operation of the first expansion valve 25 can be stopped. Furthermore, the refrigerant connection line 31 can be opened by the second expansion valve 33.

[0155] On the other hand, the first cooling water line 101, the second cooling water line 102, the seventh cooling water line 107, and the eighth cooling water line 108 can be closed by the control valve 100. Simultaneously, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the ninth coolant line 109, and the tenth coolant line 110 can be opened by the control valve 100. Then, the 11th cooling water line 111 can be closed. At this time, inside the control valve 100, the third cooling water line 103 can be connected to the sixth cooling water line 106 by the control valve 100.

[0156] Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the fifth cooling water line 105 by the control valve 100. Then, inside the control valve 100, the ninth cooling water line 109 can be connected to the tenth cooling water line 110 by the control valve 100.

[0157] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13. At this time, the coolant flowing into the electrical component 13 can cool the electrical component 13 while its temperature rises due to the waste heat generated by the electrical component 13.

[0158] The coolant, whose temperature has risen after passing through the electrical component 13, flows into the third coolant line 103 and can flow into the control valve 100 through the third port (P3). The coolant that flows into the third port (P3) can then flow into the sixth port (P6) via the control valve 100.

[0159] The coolant flowing from the third port (P3) to the sixth port (P6) by the control valve 100 is then flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth coolant line 106. The coolant flowing into the sixth coolant line 106 can pass through the battery 15. This allows the battery 15 to be efficiently heated by the high-temperature cooling water supplied from the sixth cooling water line 106.

[0160] Meanwhile, the cooling water that has passed through the battery 15 can pass through the first heater 72 of the cooling water heater 70 along the sixth cooling water line 106. Here, the cooling water heater 70 may be deactivated by the control unit 76. The cooling water flowing from the cooling water heater 70 along the sixth cooling water line 106 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the sixth cooling water line 106.

[0161] Here, the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the second expansion valve 33 can expand the refrigerant flowing in through the refrigerant connection line 31 and supply it to the chiller 30. As a result, low-temperature refrigerant can flow into the chiller 30 through the refrigerant connection line 31.

[0162] The low-temperature refrigerant flowing into the chiller 30 can cool the cooling water flowing along the fourth cooling water line 104 while exchanging heat with the cooling water flowing in from the battery 15 through the sixth cooling water line 106 and the fourth cooling water line 104. Simultaneously, the chiller 30 can evaporate the refrigerant that has flowed in through heat exchange with the cooling water. The refrigerant evaporated in the chiller 30 is supplied to the compressor 22 along the refrigerant connection line 31 and some of the refrigerant lines 21, allowing the aforementioned process to be repeated.

[0163] Meanwhile, the cooling water cooled by the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) flows to the fifth port (P5) via the control valve 100, allowing the aforementioned process to be repeated. In other words, the cooling water cooled by the chiller 30 can be supplied to the electrical components 13 along the fifth cooling water line 105 connected to the fifth port (P5) by the control valve 100.

[0164] As a result, the electrical components 13 can be cooled by the coolant, which has been cooled by the chiller 30 through heat exchange with the refrigerant. The battery 15 can then be efficiently heated by the coolant, which has increased in temperature while cooling the electrical components 13.

[0165] Meanwhile, the cooling water flowed by the third water pump 140 from the 10th port (P10) of the control valve 100 along the 10th cooling water line 110 can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the 10th cooling water line 110.

[0166] The refrigerant condensed in the condenser 24 can flow along the refrigerant line 21 and into the open refrigerant connection line 31. On the other hand, the condenser 24 can raise the temperature of the cooling water by exchanging heat with the high-temperature refrigerant supplied from the compressor 22, which has flowed in through the 10th cooling water line 110.

[0167] The cooling water, whose temperature has risen after passing through the condenser 24, can then flow into the heater core 17 after passing through the second heater 74 of the cooling water heater 70 along the ninth cooling water line 109, which is connected to the tenth cooling water line 110. Here, the second heater 74 can be activated when the temperature of the cooling water flowing into the ninth cooling water line 109 is low.

[0168] In other words, the second heater 74 can be operated by the control unit 76 to raise the temperature of the cooling water when the temperature of the cooling water flowing through the ninth cooling water line 109 is below the set temperature. This allows the temperature of the cooling water supplied to the front heater core 17 to rise rapidly when the second heater 74 is activated.

[0169] Here, the opening and closing door 23a is opened so that outside air that has flowed into the HVAC module 23 and passed through the evaporator 26 can pass through the heater core 17. As a result, outside air flowing in from the outside enters the evaporator 26, which is not supplied with refrigerant, at room temperature without being cooled. The incoming outside air is converted to a high-temperature state as it passes through the heater core 17 and flows into the vehicle interior, thereby providing heating to the vehicle interior.

[0170] Meanwhile, the cooling water that has passed through the heater core 17 flows into the ninth cooling water line 109 and can flow into the ninth port (P9). The cooling water that has flowed into the ninth port (P9) can flow along the tenth cooling water line 110, which is connected to the tenth port (P10) by the control valve 100, and the process described above can be repeated. In other words, the fifth mode allows the battery 15 to be efficiently heated using the coolant, which has risen in temperature while the electrical components 13 are being cooled. Simultaneously, the fifth mode can heat the vehicle interior using the cooling water that has undergone heat exchange with the refrigerant in the condenser 24.

[0171] Furthermore, in the fifth mode, the control valve 100 circulates the coolant independently of the ninth coolant line 109 and the tenth coolant line 110 for heating the vehicle interior, thereby improving the speed of heating.

[0172] In this embodiment, the operation in the sixth mode, which recovers waste heat from the electrical components 13 while heating the vehicle interior and raising the temperature of the battery 15, will be explained with reference to the attached Figure 7. Figure 7 shows the operating state of a vehicle heat pump system according to an embodiment of the present invention in the sixth mode.

[0173] Referring to Figure 7, in the sixth mode, the heat pump system can heat the vehicle interior while recovering waste heat from the electrical components 13 and raising the temperature of the battery 15. First, in order to heat the vehicle interior, the compressor 22 is operated so that the refrigerant flows along the refrigerant line 21. In this air conditioning unit 20, the compressor 22, the condenser 24, and a portion of the refrigerant line 21 connecting one end of the refrigerant connection line 31 can be opened.

[0174] Simultaneously, the remaining refrigerant line 21, which connects one end of the refrigerant connection line 31 to the other end of the refrigerant connection line 31 via the first expansion valve 25 and the evaporator 26, can be closed by the first expansion valve 25. At this point, the operation of the first expansion valve 25 can be stopped. Furthermore, the refrigerant connection line 31 can be opened by the second expansion valve 33. On the other hand, the first cooling water line 101 and the seventh cooling water line 107 can be closed by the control valve 100.

[0175] Simultaneously, the second coolant line 102, the third coolant line 103, the fourth coolant line 104, the fifth coolant line 105, the sixth coolant line 106, the eighth coolant line 108, the ninth coolant line 109, and the tenth coolant line 110 can be opened by the control valve 100. Then, the 11th cooling water line 111 can be closed. At this time, inside the control valve 100, the third cooling water line 103 can be connected to the second cooling water line 102 by the control valve 100.

[0176] Furthermore, within the control valve 100, the fourth cooling water line 104 can be connected to the fifth cooling water line 105 by the control valve 100. Furthermore, within the control valve 100, the eighth cooling water line 108 can be connected to the sixth cooling water line 106 by the control valve 100.

[0177] Then, inside the control valve 100, the ninth cooling water line 109 can be connected to the tenth cooling water line 110 by the control valve 100. In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively.

[0178] Subsequently, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13. At this time, the coolant flowing into the electrical component 13 can cool the electrical component 13 while its temperature rises due to the waste heat generated by the electrical component 13.

[0179] The coolant, whose temperature has risen after passing through the electrical component 13, can flow along the third coolant line 103 and enter the control valve 100 through the third port (P3). The coolant that enters the third port (P3) can then be directed to the second port (P2) by the control valve 100.

[0180] The cooling water flowed from the third port (P3) to the second port (P2) by the control valve 100 flows from the second port (P2) of the control valve 100 along the second cooling water line 102. The cooling water flowing into the second cooling water line 102 can pass through the chiller 30 while flowing along the fourth cooling water line 104 which is connected to the second cooling water line 102.

[0181] Here, the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the two expansion valves 33 can expand the refrigerant that has flowed in through the refrigerant connection line 31 and supply it to the chiller 30. This allows low-temperature refrigerant to flow into the chiller 30 through the refrigerant connection line 31.

[0182] The low-temperature refrigerant flowing into the chiller 30 can cool the cooling water flowing into the fourth cooling water line 104 while exchanging heat with the cooling water whose temperature has risen as it cools the electrical components 13. At the same time, the chiller 30 can recover waste heat from the electrical components 13 while evaporating the refrigerant that flows in through heat exchange with the high-temperature cooling water. More specifically, the cooling water, whose temperature has risen after absorbing the waste heat from the electrical components 13, is recovered as it passes through the chiller 30, thereby increasing the temperature of the refrigerant supplied to the chiller 30.

[0183] In other words, the chiller 30 can raise the temperature of the refrigerant by exchanging heat between the cooling water and the refrigerant in order to recover waste heat from the cooling water passage whose temperature has risen after passing through the electrical components 13. The refrigerant with the increased temperature is supplied to the compressor 22 along the refrigerant connection line 31 and some of the refrigerant lines 21, and the above process can be repeated.

[0184] Meanwhile, the cooling water cooled by the chiller 30 flows into the fourth cooling water line 104 and enters the control valve 100 through the fourth port (P4). The cooling water that flows into the control valve 100 through the fourth port (P4) is then flowed to the fifth port (P5) by the control valve 100, allowing the aforementioned process to be repeated.

[0185] Meanwhile, the cooling water flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth cooling water line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 can be operated by the control unit 76.

[0186] This allows the first heater 72 to heat the incoming cooling water and raise its temperature. The cooling water whose temperature has risen in the first heater 72 can then flow along the eighth cooling water line 108, which is connected to the sixth cooling water line 106. The cooling water flowing into the eighth cooling water line 108 flows into the control valve 100 through the eighth port (P8). The cooling water that has flowed into the control valve 100 through the eighth port (P8) is then flowed into the sixth port (P6) by the control valve 100, allowing the aforementioned process to be repeated.

[0187] In other words, the battery 15 is circulated along the sixth cooling water line 106 and the eighth cooling water line 108, and can be efficiently heated by the cooling water whose temperature has risen in the cooling water heater 70. Meanwhile, the cooling water flowed by the third water pump 140 from the 10th port (P10) of the control valve 100 along the 10th cooling water line 110 can pass through the condenser 24.

[0188] At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the tenth cooling water line 110. The refrigerant condensed in the condenser 24 flows along the refrigerant line 21 and can flow into the open refrigerant connection line 31.

[0189] On the other hand, the condenser 24 can raise the temperature of the cooling water by exchanging heat with the high-temperature refrigerant supplied from the compressor 22 while the cooling water flows in through the 10th cooling water line 110. The cooling water, whose temperature has risen after passing through the condenser 24, can then flow into the heater core 17 after passing through the second heater 74 of the cooling water heater 70 along the ninth cooling water line 109, which is connected to the tenth cooling water line 110.

[0190] Here, the second heater 74 can be activated when the temperature of the cooling water flowing into the ninth cooling water line 109 is low. In other words, the second heater 74 can be operated by the control unit 76 to raise the temperature of the cooling water when the temperature of the cooling water flowing through the ninth cooling water line 109 is below the set temperature. This allows the temperature of the cooling water supplied to the heater core 17 to rise rapidly when the second heater 74 is activated.

[0191] Here, the opening and closing door 23a is opened so that outside air that has flowed into the HVAC module 23 and passed through the evaporator 26 can pass through the heater core 17. As a result, outside air flowing in from the outside enters the evaporator 26, which is not supplied with refrigerant, at room temperature without being cooled. The incoming outside air is converted to a high-temperature state as it passes through the heater core 17 and then flows into the vehicle interior, thereby providing heating to the vehicle interior.

[0192] Meanwhile, the cooling water that has passed through the heater core 17 flows into the ninth cooling water line 109 and can flow into the ninth port (P9). The cooling water that has flowed into the ninth port (P9) can flow along the tenth cooling water line 110, which is connected to the tenth port (P10) by the control valve 100, and the process described above can be repeated. In other words, the sixth mode utilizes the waste heat from the electrical components 13 to be absorbed by the chiller 30 to raise the temperature of the refrigerant, thereby reducing the power consumption of the compressor 22.

[0193] Furthermore, in the sixth mode, in order to raise the temperature of the battery 15, the control valve 100 independently circulates cooling water through the sixth cooling water line 106 and the eighth cooling water line 108, and the cooling water heater 70 is used to raise the temperature of the cooling water, thereby rapidly raising the temperature of the battery 15. Simultaneously, the sixth mode can heat the vehicle interior using the cooling water that has undergone heat exchange with the refrigerant in the condenser 24.

[0194] Furthermore, in the sixth mode, the control valve 100 circulates the coolant independently of the ninth coolant line 109 and the tenth coolant line 110 for heating the vehicle interior, thereby improving the speed of heating.

[0195] Next, the operation in the seventh mode, which heats the vehicle interior while recovering outside heat and waste heat from the electrical components 13 to raise the temperature of the battery 15, will be explained with reference to the attached Figure 8. Figure 8 shows the operating state of a vehicle heat pump system according to an embodiment of the present invention, in the seventh mode.

[0196] Referring to Figure 8, in the seventh mode, the heat pump system can heat the vehicle interior while recovering heat from the outside air and waste heat from the electrical components 13, thereby raising the temperature of the battery 15. First, in order to heat the vehicle interior, the compressor 22 operates so that the refrigerant flows along the pre-coolant line 21.

[0197] In this air conditioning unit 20, the compressor 22, the condenser 24, and a portion of the refrigerant line 21 connecting one end of the refrigerant connection line 31 can be opened. Simultaneously, the remaining refrigerant line 21, which connects one end of the refrigerant connection line 31 to the other end of the refrigerant connection line 31 via the first expansion valve 25 and the evaporator 26, can be closed by the first expansion valve 25. At this point, the operation of the first expansion valve 25 can be stopped. Furthermore, the refrigerant connection line 31 can be opened by the second expansion valve 33.

[0198] On the other hand, the first coolant line 101, the second coolant line 102, the third coolant line 103, the fourth coolant line 104, and the fifth coolant line 105 can be opened by the control valve 100. Simultaneously, the sixth cooling water line 106, the seventh cooling water line 107, the eighth cooling water line 108, the ninth cooling water line 109, and the tenth cooling water line 110 can be opened by the control valve 100. Then, the 11th cooling water line 111 can be closed.

[0199] At this time, the second cooling water line 102 can be connected to the first cooling water line 101 by the control valve 100 inside the control valve 100. Furthermore, within the control valve 100, the third cooling water line 103 can be connected to the fourth cooling water line 104 by the control valve 100.

[0200] Furthermore, within the control valve 100, the seventh cooling water line 107 can be connected to the fifth cooling water line 105 by the control valve 100. Furthermore, within the control valve 100, the eighth cooling water line 108 can be connected to the sixth cooling water line 106 by the control valve 100. Then, inside the control valve 100, the ninth cooling water line 109 can be connected to the tenth cooling water line 110 by the control valve 100.

[0201] In this state, the first water pump 120, the second water pump 130, and the third water pump 140 operate, respectively. Then, the coolant flowing from the fifth port (P5) of the control valve 100 along the fifth coolant line 105 by the first water pump 120 flows into the electrical components 13. At this time, the coolant flowing into the electrical component 13 can cool the electrical component 13 while its temperature rises due to the waste heat generated by the electrical component 13.

[0202] The coolant, whose temperature has risen as it passes through the electrical component 13, flows along the third coolant line 103 and can flow into the control valve 100 through the third port (P3). The coolant that has flowed into the third port (P3) can then be directed to the fourth port (P4) by the control valve 100. The cooling water flowed from the third port (P3) to the fourth port (P4) by the control valve 100 flows from the fourth port (P4) of the control valve 100 along the fourth cooling water line 104.

[0203] The cooling water flowing into the fourth cooling water line 104 passes through the chiller 30 and then flows along the second cooling water line 102 connected to the fourth cooling water line 104, and can flow into the control valve 100 through the second port (P2). The cooling water that flows into the second port (P2) can be flowed along the first cooling water line 101 connected to the first port (P1) by the control valve 100. The cooling water that has flowed through the first cooling water line 101 then flows into the seventh cooling water line 107.

[0204] The coolant flowing through the seventh coolant line 107 can exchange heat with the outside air as it passes through the radiator 11. During this process, the coolant can absorb heat from the outside air. After passing through the radiator 11, the coolant flows into the control valve 100 through the seventh port (P7). The cooling water that flows into the control valve 100 through the seventh port (P7) is then directed to the fifth port (P5) by the control valve 100, allowing the aforementioned operation to be repeated.

[0205] Here, the refrigerant condensed in the condenser 24 can flow into the chiller 30 through the open refrigerant connection line 31. At this time, the second expansion valve 33 can expand the refrigerant that has flowed in through the refrigerant connection line 31 and supply it to the chiller 30. This allows low-temperature refrigerant to flow into the chiller 30 through the refrigerant connection line 31.

[0206] The low-temperature refrigerant flowing into the chiller 30 absorbs ambient heat from the radiator 11 and cools the coolant that flows into the fourth coolant line 104 while exchanging heat with the coolant whose temperature has risen as it cools the electrical components 13. At the same time, the chiller 30 can recover heat from the outside air and waste heat from the electrical components 13 while evaporating the refrigerant that flows in through heat exchange with the high-temperature cooling water. More specifically, the cooling water, whose temperature has risen by absorbing heat from the outside air and waste heat from the electrical components 13, is recovered as it passes through the chiller 30, while simultaneously raising the temperature of the refrigerant supplied to the chiller 30.

[0207] In other words, the chiller 30 can raise the temperature of the refrigerant by exchanging heat between the cooling water and the refrigerant in order to recover waste heat from the cooling water passage whose temperature has risen after passing through the electrical components 13. The refrigerant with the increased temperature is supplied to the compressor 22 along the refrigerant connection line 31 and some of the refrigerant lines 21, and the above process can be repeated.

[0208] Meanwhile, the cooling water flowed by the second water pump 130 from the sixth port (P6) of the control valve 100 along the sixth cooling water line 106 can pass through the battery 15. The coolant that has passed through the battery 15 can pass through the first heater 72 of the coolant heater 70 along the sixth coolant line 106. Here, the coolant heater 70 can be operated by the control unit 76. This allows the first heater 72 to heat the incoming cooling water and raise its temperature. The cooling water whose temperature has risen in the first heater 72 can then flow along the eighth cooling water line 108, which is connected to the sixth cooling water line 106.

[0209] The cooling water flowing into the eighth cooling water line 108 flows into the control valve 100 through the eighth port (P8). The cooling water that has flowed into the control valve 100 through the eighth port (P8) is then flowed into the sixth port (P6) by the control valve 100, allowing the aforementioned process to be repeated. In other words, the battery 15 is circulated along the sixth cooling water line 106 and the eighth cooling water line 108, and can be efficiently heated by the cooling water whose temperature has risen in the cooling water heater 70.

[0210] Meanwhile, the cooling water flowed by the third water pump 140 from the 10th port (P10) of the control valve 100 along the 10th cooling water line 110 can pass through the condenser 24. At this time, the condenser 24 can condense the refrigerant supplied from the compressor 22 through the refrigerant line 21 while exchanging heat with the cooling water flowing through the 10th cooling water line 110. The refrigerant condensed in the condenser 24 flows along the refrigerant line 21 and can flow into the open refrigerant connection line 31.

[0211] On the other hand, the condenser 24 can raise the temperature of the cooling water by exchanging heat with the high-temperature refrigerant supplied from the compressor 22 while the cooling water flows in through the 10th cooling water line 110. The cooling water, whose temperature has risen as it passes through the condenser 24, can then flow into the heater core 17 after passing through the second heater 74 of the cooling water heater 70 along the ninth cooling water line 109, which is connected to the tenth cooling water line 110. Here, the second heater 74 can be activated when the temperature of the cooling water flowing into the ninth cooling water line 109 is low. In other words, the second heater 74 can be operated by the control unit 76 to raise the temperature of the cooling water when the temperature of the cooling water flowing through the ninth cooling water line 109 is below the set temperature.

[0212] This allows the second heater 74 to activate, rapidly raising the temperature of the cooling water supplied to the heater core 17. Here, the opening and closing door 23a is opened so that outside air that has flowed into the HVAC module 23 and passed through the evaporator 26 can pass through the heater core 17. As a result, outside air flowing in from the outside enters the evaporator 26, which is not supplied with refrigerant, at room temperature without being cooled. The incoming outside air is converted to a high-temperature state as it passes through the heater core 17 and flows into the vehicle interior, thereby providing heating to the vehicle interior.

[0213] On the one hand, the cooling water that has passed through the heater core 17 can flow into the ninth cooling water line 109 and enter the ninth port (P9). The cooling water that has entered the ninth port (P9) can repeat the above-described process while flowing along the tenth cooling water line 110 connected to the tenth port (P10) by the control valve 100. That is, in the seventh mode, the outside air heat and the waste heat of the electrical component 13 are utilized to absorb the refrigerant by the chiller 30 to raise the temperature of the refrigerant, so that the power consumption of the compressor 22 can be reduced.

[0214] Also, in the seventh mode, for the purpose of raising the temperature of the battery 15, the control valve 100 independently circulates the cooling water through the sixth cooling water line 106 and the eighth cooling water line 108, and uses the cooling water heater 70 to raise the temperature of the cooling water, so that the temperature of the battery 15 can be quickly raised. At the same time, the seventh mode can heat the vehicle interior using the cooling water that has exchanged heat with the refrigerant in the condenser 24. Also, in the seventh mode, for the purpose of heating the vehicle interior, the control valve 100 independently circulates the cooling water from the ninth cooling water line 109 and the tenth cooling water line 110, so that the heating quick effectiveness can be improved.

[0215] As described above, according to the vehicle heat pump system according to the embodiment of the present invention, by using high-temperature cooling water to heat the vehicle interior and applying one control valve 100 for controlling the flow of the cooling water, the overall system can be simplified. Also, the present invention can improve the quick effectiveness of the interior heating by forming an independent flow of the cooling water for the purpose of heating the vehicle interior. Also, the present invention can efficiently control the temperature of the battery 15 together with the temperature adjustment of the vehicle interior by selectively using the outside air heat, the waste heat of the electrical component 13, and the thermal energy generated by the refrigerant, minimize the usage amount of the electric heater during interior heating, reduce the power consumption, and improve the overall marketability. In addition, the present invention can increase the overall driving distance of the vehicle by efficiently adjusting the temperature of the battery 15 so that the optimal performance of the battery 15 is exhibited.

[0216] Furthermore, the present invention enables overall manufacturing cost reduction and weight reduction through simplification of the entire system, and can improve space utilization by minimizing components. As described above, the present invention has been described by limited examples and drawings, but the present invention is not limited thereto, and it is needless to say that various modifications and variations can be made within the scope equivalent to the technical idea of the present invention and the following claims by those having ordinary knowledge in the technical field to which the present invention belongs.

Explanation of Reference Numerals

[0217] [ 11 Radiator 12 Reservoir Tank 13 Electrical Components 15 Battery 17 Heater Core 20 Air Conditioning Device 21 Refrigerant Line 22 Compressor 24 Condenser 25 First Expansion Valve 26 Evaporator 30 Chiller 31 Refrigerant Connection Line 33 Second Expansion Valve 70 Cooling Water Heater 72, 74 First and Second Heaters 76 Control Unit 100 Control Valve 101, 102 First and Second Cooling Water Lines 103, 104 Third and Fourth Cooling Water Lines 105, 106 Fifth and Sixth Cooling Water Lines 107, 108 Seventh and Eighth Cooling Water Lines \109, 110 Ninth and Tenth Cooling Water Lines 111 Eleventh Cooling Water Line 120 First water pump 130 Second water pump 140 Third Water Pump P1, P2: First and second ports P3, P4 3rd and 4th ports P5, P6 Ports 5 and 6 P7, P8: Ports 7 and 8 P9, P10 (Ports 9 and 10)

Claims

1. A control valve that controls the flow of cooling water that flows into the interior and has multiple ports formed therein, Multiple cooling water lines connected to the control valve, through which cooling water is selectively flowed by the control valve, The above-mentioned plurality of cooling water lines include a radiator, electrical components, a battery, and a heater core connected to or provided in one of the cooling water lines, A vehicle heat pump system further comprising a coolant heater that independently heats the coolant flowing through two selected coolant lines from among the plurality of coolant lines.

2. The air conditioning system further includes a compressor, condenser, first expansion valve, and evaporator interconnected through a refrigerant line through which the refrigerant flows, The aforementioned air conditioning device, The system further includes a refrigerant connection line connected to the refrigerant line through which the refrigerant flows, a chiller provided in the refrigerant connection line, and a second expansion valve. The vehicle heat pump system according to claim 1, characterized in that the condenser and the chiller are provided in one of the plurality of cooling water lines, and cooling water is selectively flowed through them.

3. The aforementioned multiple cooling water lines are A first cooling water line, one end of which is connected to the control valve, through which cooling water is selectively flowed, A second cooling water line, one end of which is connected to the control valve, through which cooling water is selectively flowed, A third coolant line, one end of which is connected to the control valve, selectively flows coolant, and the other end of which is connected to the electrical component, A fourth cooling water line is provided, with one end connected to the control valve, through which cooling water is selectively flowed, and the chiller is installed. A fifth coolant line is connected to the aforementioned control valve at one end, allowing coolant to flow selectively, and the other end is connected to the aforementioned electrical component. The vehicle heat pump system according to claim 2, further comprising a sixth coolant line, one end of which is connected to the control valve, through which coolant is selectively flowed, and through which the battery is provided.

4. The aforementioned multiple cooling water lines are A seventh coolant line is provided, to which one end is connected to the control valve and coolant is selectively flowed, and the radiator is equipped with the seventh coolant line. An eighth cooling water line, one end of which is connected to the control valve, through which cooling water is selectively flowed, A ninth cooling water line is provided, with one end connected to the control valve, through which cooling water is selectively flowed, and the heater core is provided. One end of the control valve is connected to the tenth cooling water line through which cooling water flows selectively, and the condenser is provided. The vehicle heat pump system according to claim 3, further comprising an eleventh coolant line, one end of which is connected to the other end of the first coolant line and the other end of the seventh coolant line, and the other end of which is connected to the other end of the ninth coolant line and the other end of the tenth coolant line.

5. The other end of the first cooling water line is connected to the other end of the seventh cooling water line. The vehicle heat pump system according to claim 4, characterized in that the other end of the second cooling water line is connected to the fourth cooling water line between the chiller and the other end of the fourth cooling water line.

6. The other end of the fourth cooling water line and the other end of the eighth cooling water line are connected to the other end of the sixth cooling water line, respectively. The vehicle heat pump system according to claim 4, characterized in that the other end of the seventh cooling water line is connected to the other end of the first cooling water line.

7. The cooling water heater is, The first heater provided in the sixth cooling water line, A second heater provided in the ninth cooling water line, The vehicle heat pump system according to claim 4, further comprising a control unit for controlling the operation of the first heater and the second heater.

8. The control valve controls the flow of coolant according to at least one mode for regulating the temperature inside the vehicle cabin or the temperature of the battery. The at least one of the above modes is, A first mode for cooling the electrical components and the battery using the coolant cooled by the radiator while air conditioning the vehicle interior, A second mode for cooling the electrical components using the coolant cooled by the radiator while simultaneously cooling the vehicle interior, and for cooling the battery using the coolant that has undergone heat exchange with the refrigerant, A third mode for heating the vehicle interior while using the coolant cooled by the radiator to cool the electrical components and the battery, A fourth mode for heating the vehicle interior while using the coolant cooled by the radiator to cool the electrical components, and using the coolant that has undergone heat exchange with the refrigerant to cool the battery, A fifth mode for heating the vehicle interior while using the waste heat from the electrical components to raise the temperature of the battery, A sixth mode for heating the vehicle interior while recovering waste heat from the electrical components and raising the temperature of the battery, The vehicle heat pump system according to claim 4, further comprising a seventh mode for heating the vehicle interior while recovering outside air heat and waste heat from the electrical components to raise the temperature of the battery.

9. In the case of the first mode described above, The first coolant line, the third coolant line, the fourth coolant line, the fifth coolant line, the sixth coolant line, the seventh coolant line, and the tenth coolant line are opened by the control valve. The second cooling water line, the eighth cooling water line, and the ninth cooling water line are closed by the control valve. The 11th cooling water line is opened, Inside the control valve, the third cooling water line is connected to the first cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the seventh cooling water line is connected to the sixth cooling water line and the tenth cooling water line by the control valve. In the aforementioned air conditioning system, the refrigerant line connecting the compressor, the condenser, the first expansion valve, and the evaporator is opened by the first expansion valve. The refrigerant connection line is closed by the second expansion valve. The vehicle heat pump system according to claim 8, characterized in that the first expansion valve expands the refrigerant flowing in through the refrigerant line and supplies it to the evaporator.

10. In the case of the second mode described above, The first coolant line, the third coolant line, the fourth coolant line, the fifth coolant line, the sixth coolant line, the seventh coolant line, and the tenth coolant line are opened by the control valve. The second cooling water line, the eighth cooling water line, and the ninth cooling water line are closed by the control valve. The 11th cooling water line is opened, Inside the control valve, the third cooling water line is connected to the first cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the seventh cooling water line is connected to the fifth cooling water line and the tenth cooling water line by the control valve. In the aforementioned air conditioning system, the refrigerant line connecting the compressor, the condenser, the first expansion valve, and the evaporator is opened by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The first expansion valve expands the refrigerant flowing in through the refrigerant line and supplies it to the evaporator. The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

11. In the case of the aforementioned third mode, The first coolant line, the third coolant line, the fourth coolant line, the fifth coolant line, the sixth coolant line, the seventh coolant line, the ninth coolant line, and the tenth coolant line are opened by the control valve. The second cooling water line and the eighth cooling water line are closed by the control valve. The 11th cooling water line is closed, Inside the control valve, the third cooling water line is connected to the first cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the seventh cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve. In the aforementioned air conditioning system, a portion of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are opened. The remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The operation of the first expansion valve is stopped, The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

12. In the case of the four modes mentioned above, The first coolant line, the third coolant line, the fourth coolant line, the fifth coolant line, the sixth coolant line, the seventh coolant line, the ninth coolant line, and the tenth coolant line are opened by the control valve. The second cooling water line and the eighth cooling water line are closed by the control valve. The 11th cooling water line is closed, Inside the control valve, the third cooling water line is connected to the first cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the seventh cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve. In the aforementioned air conditioning system, a portion of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are opened. The remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The operation of the first expansion valve is stopped, The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

13. In the case of the fifth mode, The first cooling water line, the second cooling water line, the seventh cooling water line, and the eighth cooling water line are closed by the control valve. The third, fourth, fifth, sixth, ninth, and tenth cooling water lines are opened by the control valve. The 11th cooling water line is closed, Inside the control valve, the third cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve. In the aforementioned air conditioning system, a portion of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are opened. The remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The operation of the first expansion valve is stopped, The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

14. In the case of the sixth mode, The first cooling water line and the seventh cooling water line are closed by the control valve. The second coolant line, the third coolant line, the fourth coolant line, the fifth coolant line, the sixth coolant line, the eighth coolant line, the ninth coolant line, and the tenth coolant line are opened by the control valve. The 11th cooling water line is closed, Inside the control valve, the third cooling water line is connected to the second cooling water line by the control valve. Inside the control valve, the fourth cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the eighth cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve. In the aforementioned air conditioning system, a portion of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are opened. The remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The operation of the first expansion valve is stopped, The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

15. In the case of the seventh mode, The first cooling water line, the second cooling water line, the third cooling water line, the fourth cooling water line, and the fifth cooling water line are opened by the control valve. The sixth, seventh, eighth, ninth, and tenth cooling water lines are opened by the control valve. The 11th cooling water line is closed, Inside the control valve, the second cooling water line is connected to the first cooling water line by the control valve. Inside the control valve, the third cooling water line is connected to the fourth cooling water line by the control valve. Inside the control valve, the seventh cooling water line is connected to the fifth cooling water line by the control valve. Inside the control valve, the eighth cooling water line is connected to the sixth cooling water line by the control valve. Inside the control valve, the ninth cooling water line is connected to the tenth cooling water line by the control valve. In the aforementioned air conditioning system, a portion of the refrigerant lines connecting the compressor, the condenser, and the refrigerant connection lines are opened. The remaining refrigerant line connecting the first expansion valve and the evaporator from the refrigerant connection line is closed by the first expansion valve. The refrigerant connection line is opened by the second expansion valve, The operation of the first expansion valve is stopped, The vehicle heat pump system according to claim 8, characterized in that the second expansion valve expands the refrigerant flowing in through the refrigerant connection line and supplies it to the chiller.

16. The control valve is A first port to which one end of the first cooling water line is connected, A second port to which one end of the second cooling water line is connected, A third port to which one end of the third cooling water line is connected, The vehicle heat pump system according to claim 4, further comprising a fourth port to which one end of the fourth cooling water line is connected.

17. The control valve is A fifth port to which one end of the fifth cooling water line is connected, A sixth port to which one end of the sixth cooling water line is connected, A seventh port to which one end of the seventh cooling water line is connected, The eighth port to which one end of the eighth cooling water line is connected, A ninth port to which one end of the ninth cooling water line is connected, The vehicle heat pump system according to claim 16, further comprising a tenth port to which one end of the tenth cooling water line is connected.

18. The system further includes at least one water pump that causes cooling water to flow through at least one of the cooling water lines 1 to 10 mentioned above. The at least one water pump is The first water pump is located at the fifth port, The second water pump is located at the sixth port, The vehicle heat pump system according to claim 4, further comprising a third water pump provided in a tenth port.

19. The seventh cooling water line includes: The vehicle heat pump system according to claim 4, further comprising a reservoir tank.

20. The aforementioned air conditioning device, The vehicle heat pump system according to claim 2, further comprising an HVAC module including an opening / closing door that internally houses the heater core and the evaporator, and adjusts the air that has passed through the evaporator due to cooling or heating of the vehicle interior to selectively flow into the heater core.

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