Heat pump system for vehicle

Abstract

A heat pump system for a vehicle, comprising a cooling device, a battery cooling device, a cooler, a heating device, an air conditioner and a concentrated energy device, wherein the cooling device comprises a radiator, a first water pump, a first valve and a liquid storage tank; the battery cooling device comprises a battery coolant line connected to the liquid storage tank via a second valve, a second water pump and a battery module; the cooler is in a first branch line and connected to the battery coolant line via a second valve; the heating device comprises a first connecting line connected to the coolant line via a second valve and a third water pump and a heater in the first connecting line; the air conditioner comprises a second connecting line connected to the battery coolant line via a fourth valve and a fourth water pump and a cooler in the second connecting line, and the concentrated energy device is connected to the first connecting line and the second connecting line.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2019-0143946 filed on November 12, 2019, in the Korean Intellectual Property Office, which is incorporated herein by reference. Technical Field

[0003] The present invention relates to a heat pump system for a vehicle. Background Art

[0004] Generally, an air conditioning system of a vehicle includes an air conditioner that circulates a refrigerant to heat or cool the interior of the vehicle.

[0005] The air conditioner (which is capable of maintaining fresh indoor conditions by maintaining the indoor temperature of the vehicle at an appropriate temperature regardless of changes in outdoor temperature) is configured to heat or cool the interior of the vehicle through heat exchange between the condenser and the evaporator in the process of driving the refrigerant discharged from the compressor to circulate again to the compressor through the condenser, the receiver dryer, the expansion valve and the evaporator.

[0006] That is, in the air conditioner, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor is condensed by the condenser, and then evaporated by the evaporator through the receiver dryer and the expansion valve, reducing the indoor temperature and humidity in the summer cooling mode.

[0007] Recently, as people's concerns about energy efficiency and environmental pollution have gradually increased, there is a need to develop an environmentally friendly vehicle that can basically replace vehicles with internal combustion engines. The environmentally friendly vehicles are generally divided into electric vehicles with fuel cells or electricity as power sources and hybrid vehicles with engines and batteries as power sources.

[0008] Unlike ordinary vehicles that use air conditioning, electric vehicles and hybrid vehicles of eco-friendly vehicles do not use a separate heater, and air conditioning applied to eco-friendly vehicles is generally called a heat pump system.

[0009] For electric vehicles using fuel cells, the chemical reaction energy of oxygen and hydrogen is converted into electrical energy to generate driving force. During this process, the chemical reaction in the fuel cell generates heat energy. Therefore, in order to ensure the performance of the fuel cell, the generated heat needs to be effectively removed.

[0010] Even in hybrid vehicles, driving force is generated by driving an electric motor using electricity provided by a fuel cell or battery and an engine driven by ordinary fuel. Therefore, the performance of the electric motor can only be ensured by effectively removing the heat generated by the fuel cell or battery and the electric motor.

[0011] Therefore, in a hybrid vehicle or electric vehicle of the related art, a battery cooling system, a cooling assembly, and a heat pump system should be configured to have respective independent circuits to prevent the motor, electrical components, and batteries including the fuel cell from heating up.

[0012] Therefore, the size and weight of the cooling module arranged at the front of the vehicle are increased, and the arrangement of connection lines supplying refrigerant or coolant to the heat pump system, the cooling device, and the battery cooling system in the engine compartment becomes complicated.

[0013] In addition, since a battery cooling system is separately provided for heating and cooling the battery according to the vehicle status so that the battery can output optimal performance, multiple valves are used for connecting pipelines, and noise and vibration caused by frequent opening and closing operations may be transmitted to the vehicle interior, and riding comfort may be reduced.

[0014] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present invention and therefore may contain information that does not constitute the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0015] The present invention relates to a heat pump system for a vehicle. Detailed Description of the Invention The present invention relates to a heat pump system for a vehicle for selectively using a high-temperature coolant or a low-temperature coolant to cool or heat the interior of the vehicle.

[0016] Embodiments of the present invention are directed to providing a heat pump system for a vehicle having the advantage of selectively exchanging heat energy generated from a coolant with the coolant when the coolant condenses and evaporates to control the interior temperature of the vehicle using a heat-exchanged coolant of low or high temperature.

[0017] An exemplary embodiment of the present invention provides a heat pump system for a vehicle that adjusts the temperature of a battery module by using a chiller that performs heat exchange between a refrigerant and a coolant and improves heating efficiency of the vehicle using waste heat from electrical components and the battery module.

[0018] The heat pump system for a vehicle according to an exemplary embodiment of the present invention includes a cooling device, which includes a radiator, a first water pump, a first valve and a reservoir tank connected by a coolant line, the coolant line being configured to circulate a coolant in the coolant line to cool at least one electrical component provided in the coolant line; a battery cooling device, which includes a battery coolant line connected to the reservoir tank through a second valve; and a second water pump and a battery module, the second water pump and the battery module being connected through the battery coolant line to circulate the coolant in the battery module; a refrigerator, which is provided in a first branch line, the first branch line being connected to the battery coolant line through the second valve, the refrigerant passing through the refrigerator, and the refrigerant being selectively introduced into a second branch line connecting the coolant line and the first branch line through the first valve, the first branch line and the refrigerant. Heat exchange is performed between the coolants in the branch lines to adjust the temperature of the coolant; a heating device, which includes: a first connecting line, which is connected to the coolant line through a second valve, and a third water pump and a heater, which are arranged in the first connecting line to use the coolant to heat the interior of the vehicle; an air conditioner, which includes: a second connecting line, which is connected to the battery coolant line through a fourth valve, and a fourth water pump and a cooler, which is arranged in the second connecting line to use the coolant to cool the interior of the vehicle, and an energy concentrating device, which is connected to the first connecting line and the second connecting line to supply low-temperature coolant to the air conditioner and supply high-temperature coolant to the heating device, and selectively performs heat exchange with the coolant on heat energy generated when the refrigerant circulating inside is condensed and evaporated.

[0019] A first end of the second branch line may be connected to the coolant line through a first valve, and a second end of the second branch line may be connected to the first branch line between the second valve and the refrigerator, and the heater and the cooler may be provided inside the HVAC module.

[0020] When the battery module is heated, the second branch line can be opened by operating the first valve. In the cooling device, the coolant line connected to the radiator can be closed based on the second branch line, and coolant that has passed through the electrical components circulates along the opened second branch line and the coolant line without passing through the radiator through the operation of the first water pump. A portion of the first branch line can be connected to the second branch line, and the battery coolant line connected to the reservoir tank can be closed based on the first branch line. In the battery cooling device, when the reservoir tank and the battery coolant line are connected by operating the second valve, coolant can circulate along the battery coolant line and a portion of the first branch line through the operation of the second water pump. In the heating device, the coolant line and the first connecting line can be connected by operating the third valve, and in the cooling device, coolant heated by the waste heat of the electrical components can be circulated to the first connecting line through the operation of the third water pump. High-temperature coolant flowing from the first connecting line into the coolant line can flow from the coolant line into the first branch line through the second branch line and be supplied to the battery modules connected to the battery coolant line through the first branch line.

[0021] The HVAC module may include an opening and closing door provided between the heater and the cooler and configured to control external air passing through the evaporator to be selectively introduced into the heater according to cooling, heating, and heating and dehumidification modes of the vehicle.

[0022] The HVAC module may further include an air heater on opposite sides of the cooler, the heater being interposed therebetween to selectively heat external air passing through the heater.

[0023] When the temperature of the coolant supplied to the heater is lower than a target temperature for interior heating, the air heater may operate to increase the temperature of outside air passing through the heater.

[0024] The concentrated energy device may include: a condenser that circulates refrigerant therein, is arranged in a first connecting line between the third valve and the heater, condenses the refrigerant through heat exchange between the refrigerant and the coolant, and increases the temperature of the coolant; an expansion valve that is connected to the condenser through a refrigerant line; an evaporator that is connected to the expansion valve through a refrigerant line, is arranged in a second connecting line between the fourth valve and the cooler, evaporates the refrigerant through heat exchange between the refrigerant and the coolant, and reduces the temperature of the refrigerant; a compressor that is arranged on the refrigerant line between the evaporator and the condenser, and an accumulator that is arranged on the refrigerant line between the evaporator and the compressor, wherein the refrigerator is arranged on the refrigerant line between the evaporator and the accumulator.

[0025] In a heating mode of the vehicle, the condenser may condense the refrigerant through heat exchange between the coolant circulating the first connecting line and the high-temperature refrigerant supplied from the compressor, and may supply the high-temperature coolant to the heater through the first connecting line.

[0026] In a cooling mode of the vehicle, the evaporator may heat-exchange the coolant of the circulating second connecting line with the low-temperature internal evaporating refrigerant to cool the coolant, and the low-temperature coolant may be supplied to the cooler through the second connecting line.

[0027] When cooling the battery modules in the vehicle's cooling mode, in the cooling device, coolant can be circulated through the coolant line by operating the first water pump, and the second connecting line can be closed by operating the first valve. In the battery cooling device, the first branch line can be opened by operating the second valve, and a portion of the battery coolant line connected to the reservoir can be closed based on the first branch line. The coolant, which has passed through the chiller, can be supplied to the battery modules along the battery coolant line and the first branch line by operating the second water pump. In the heating device, the coolant line and the first connecting line can be connected by operating the third valve to supply coolant from the cooling device. This coolant can be circulated through the first connecting line by operating the third water pump. In the air conditioner, the second connecting line can be formed into an independent closed circuit, independent of the battery coolant line, by operating the fourth valve. Coolant can be circulated through the second connecting line by operating the fourth water pump, and the low-temperature coolant that has passed through the evaporator can be supplied to the chiller. In this concentrated energy device, each component can be operated to circulate refrigerant along the refrigerant line.

[0028] The coolant of the circulating heating equipment can be supplied to the condenser along the first connecting pipeline, so that the condenser condenses the refrigerant through heat exchange with the coolant, and the coolant of the circulating air conditioner can be supplied to the evaporator along the second connecting pipeline, so that the evaporator evaporates the refrigerant through heat exchange with the coolant.

[0029] When the battery module is rapidly charged in the vehicle's cooling mode, in the cooling device, the coolant can be circulated in the coolant line by the operation of the first water pump. In the battery cooling device, the first branch line can be opened by the operation of the second valve, a portion of the battery coolant line connected to the reservoir can be closed based on the first branch line, and the coolant that has passed through the refrigerator can be supplied to the battery module along the battery coolant line and the first branch line by the operation of the second water pump. In the heating device, the coolant line and the first connecting line can be connected by the operation of the third valve, so that the coolant is supplied from the cooling device and circulated along the first connecting line by the operation of the third water pump. In the air conditioner, the second connecting line can be connected to the battery coolant line by the operation of the fourth valve, the coolant can be supplied from the battery cooling device, and the coolant can be circulated along the second connecting line by the operation of the fourth water pump. In this concentrated energy device, each component can be operated to circulate the refrigerant along the refrigerant line.

[0030] When the vehicle is in heating mode, the second branch line can be opened by operating the first valve to recover waste heat from electrical components. In the cooling system, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank can be closed based on the second branch line, the first branch line connected to the second branch line can be opened, and the remaining portion of the battery coolant line, except for the battery coolant line connected to the reservoir tank, can be closed based on the first branch line. The battery cooling system can be stopped, and the coolant line and the first connecting line can be operated to form an independent closed loop by operating the third valve. Coolant can be raised in temperature by operating the first water pump while passing through the electrical components. Coolant can then be supplied to the chiller along the second branch line and the opened portion of the first branch line without passing through the radiator. Coolant discharged from the chiller can then flow through the first branch line and the opened battery coolant line into the reservoir tank. In the heating system, coolant can be circulated along the first connecting line by operating the third water pump. In the concentrated energy device, each component can be operated to circulate refrigerant along the refrigerant line, and the air conditioner can be stopped.

[0031] When the vehicle is in heating mode, the second branch line can be opened by operating the first valve. In the cooling system, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank can be closed based on the second branch line, the first branch line connected to the second branch line can be opened, and the remaining portion of the battery coolant line, except for the battery coolant line connected to the reservoir tank, can be closed based on the first branch line. The battery cooling system can be deactivated. The coolant line and the first connecting line can form an independent closed loop by operating the third valve. Coolant, which has risen in temperature while passing through electrical components due to the operation of the first water pump, can be supplied to the chiller along the second branch line and a portion of the opened first branch line without passing through the radiator. Coolant discharged from the chiller can flow into the reservoir tank through the first branch line and the opened battery coolant line. In the heating system, the coolant can be circulated along the first connecting line by operating the third water pump. In the concentrated energy device, each component can be operated so that the refrigerant circulates along the refrigerant line, and the air conditioner can be deactivated.

[0032] In the vehicle's low-temperature dehumidification mode, the second branch line can be opened by operating the first valve. In the cooling system, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank can be closed based on the second branch line, a portion of the first branch line connected to the second branch line can be opened, and the remaining portion of the battery coolant line, excluding the battery coolant line connected to the reservoir tank, can be closed by operating the second valve based on the first branch line. The battery cooling system can be stopped, and the coolant line and the first connecting line can be formed into an independent closed loop by operating the third valve. Coolant can be raised in temperature by operating the first water pump while passing through electrical components, then supplied to the refrigerator along the second branch line and the opened portion of the first branch line without passing through the radiator. Coolant discharged from the refrigerator can flow through the first branch line and the opened battery coolant line into the reservoir tank. In the heating system, coolant can be circulated along the first connecting line by operating the third water pump. In the concentrated energy device, each component can be operated to circulate refrigerant along the refrigerant line, and in the air conditioner, coolant can be circulated along the second connecting line by operating the fourth water pump.

[0033] In the vehicle's high-temperature dehumidification mode, the second branch line can be closed by operating the first valve. In the cooling system, coolant can be circulated in the coolant line by operating the first water pump, the battery coolant line and the first branch line can be closed by operating the second valve, and the battery cooling system can be stopped. In the heating system, the coolant line and the first connecting line can be connected by operating the third valve, so that coolant is supplied from the cooling system, and the coolant can be circulated along the first connecting line by operating the third water pump. In the concentrated energy device, each component can be operated to circulate the refrigerant along the refrigerant line, and in the air conditioner, the coolant can be circulated along the second connecting line by operating the fourth water pump.

[0034] When using coolant to cool the electrical components and battery modules, the first and second branch lines can be closed by operating the first and second valves, respectively. Coolant cooled in the radiator and stored in the reservoir tank can be supplied to the electrical components by operating the first water pump, and the coolant stored in the reservoir tank can be supplied to the battery modules while circulating through the battery coolant line connected to the coolant line by operating the second valve.

[0035] When the vehicle is in heating mode, using waste heat from electrical components without operating the concentrated energy device, the second branch line can be opened by operating the first valve. In the cooling system, based on the second branch line, a portion of the coolant line connected to the radiator and a portion of the coolant line connecting the radiator and the reservoir tank can be closed, the first branch line connected to the second branch line can be opened, and the remaining portion of the battery coolant line, excluding the battery coolant line connected to the reservoir tank, can be closed based on the first branch line. The battery cooling system can be deactivated. Coolant, whose temperature has risen while passing through the electrical components due to the operation of the first water pump, can be supplied to the heater along the first connecting line connected via the third valve. Coolant discharged from the heater can be supplied to the chiller along the first connecting line, the third valve, the coolant line, the second branch line, and a portion of the first branch line without passing through the radiator. Coolant discharged from the chiller can flow into the reservoir tank through the first branch line and the opened battery coolant line.

[0036] The heating device may include a coolant heater provided in the first connecting line between the third water pump and the heater.

[0037] In a heating mode and a heating and dehumidifying mode of the vehicle, the coolant heater may be operated when the temperature of the coolant supplied to the heater is lower than a target temperature, or when the battery module is heated.

[0038] When the electric component is overheated in the heating mode, the first valve may open the coolant line connected to the radiator to allow some coolant passing through the electric component to flow into the second branch line and allow the remaining coolant to flow into the radiator.

[0039] The first valve and the second valve may be three-way valves, and the third valve and the fourth valve may be four-way valves.

[0040] The refrigerator, condenser, and evaporator may be water-cooled heat exchangers into which the coolant flows.

[0041] The refrigerant circulating in the centralized energy plant may be R152-a, R744 or R290 refrigerant.

[0042] A heat pump system for a vehicle according to another exemplary embodiment of the present invention is provided. The concentrated energy device may include a condenser, which circulates refrigerant therein and is disposed in a first connecting line between a third valve and a heater. The condenser condenses the refrigerant through heat exchange between the refrigerant and the coolant, thereby increasing the temperature of the coolant. A first expansion valve is connected to the condenser via a refrigerant line. An evaporator, which is connected to the first expansion valve via a refrigerant line, is disposed in a second connecting line between a fourth valve and the cooler. The evaporator evaporates the refrigerant through heat exchange between the refrigerant and the coolant, thereby decreasing the temperature of the refrigerant. A compressor is disposed in the refrigerant line between the evaporator and the condenser. An accumulator is disposed in the refrigerant line between the evaporator and the compressor. The refrigerant is disposed in the refrigerant connecting line, a first end of the refrigerant connecting line is connected to the refrigerant line between the condenser and the first expansion valve, and a second line of the refrigerant connecting line is connected to the accumulator.

[0043] The refrigerator is connected in parallel to the refrigerant line through a refrigerant connecting line, and a second expansion valve for expanding while selectively controlling the flow of refrigerant into the refrigerator may be provided in the refrigerant connecting line.

[0044] As described above, in the heat pump system for a vehicle according to an exemplary embodiment of the present invention, by selectively allowing heat energy generated from the refrigerant to be heat-exchanged with the refrigerant when the refrigerant is condensed and evaporated to control the interior temperature of the vehicle using a heat-exchanged refrigerant of low temperature or high temperature, the system can be simplified and the arrangement of the connecting pipelines in which the coolant circulates can be simplified.

[0045] According to an embodiment of the present invention, by performing heat exchange between coolant and refrigerant using one refrigerator, the temperature of the battery module can be adjusted according to the mode of the vehicle, and the interior of the vehicle can be cooled and heated by using the coolant, thereby simplifying the entire system.

[0046] Furthermore, embodiments of the present invention can improve vehicle heating efficiency using waste heat from electrical components and battery modules, and can increase the overall range of the vehicle through effective temperature control of the battery modules to obtain optimal performance of the battery modules.

[0047] Furthermore, compared to air conditioners using high-performance refrigerants according to the prior art, embodiments of the present invention can reduce size and weight by encapsulating a concentrated energy module for generating heat energy through condensation and evaporation of a coolant, and can prevent the generation of noise, vibration, and operational instability.

[0048] Furthermore, the embodiments of the present invention may use a coolant heater applied to a heating device to heat a battery module or assist in interior heating of a vehicle, thereby reducing cost and weight.

[0049] Furthermore, by simplifying the entire system, production costs and weight can be reduced, and space utilization can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 A block diagram of a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0051] Figure 2 A diagram illustrating an operation state of cooling electric components and a battery module using a coolant in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0052] Figure 3 An operation state diagram is shown for cooling a battery module by using a refrigerant in a cooling mode of a vehicle in a heat pump system of a vehicle according to an exemplary embodiment of the present invention.

[0053] Figure 4 An operation state diagram for cooling a battery module when the battery module is quickly charged in a cooling mode of a vehicle in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0054] Figure 5 An operational state diagram illustrating waste heat recovery of electric components according to a heating mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0055] Figure 6 An operational state diagram illustrating waste heat recovery of a battery module in a heating mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0056] Figure 7 An operation state diagram for performing a heating mode using waste heat of electric components in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0057] Figure 8 An operation state diagram of a low-temperature dehumidification mode in a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown.

[0058] Figure 9 An operation state diagram of a high-temperature dehumidification mode in a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown.

[0059] Figure 10 An operating state diagram of a battery module in a heat pump system for heating a vehicle according to an exemplary embodiment of the present invention is shown.

[0060] Figure 11 A block diagram of a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown. DETAILED DESCRIPTION

[0061] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0062] The exemplary embodiments disclosed in this specification and the configurations depicted in the accompanying drawings are merely preferred embodiments of the present invention and do not cover the entire scope of the present invention. Therefore, it should be understood that various equivalents and changes may exist when applying this specification.

[0063] In order to clarify the embodiments of the present invention, parts irrelevant to the description will be omitted, and the same reference numerals will be used throughout the specification to designate the same elements or equivalents.

[0064] Furthermore, the size and thickness of each element are arbitrarily shown in the drawings, but the embodiments of the present invention are not necessarily limited thereto, and in the drawings, the thickness of layers, films, panels, regions, etc. are exaggerated for clarity.

[0065] In addition, unless explicitly described to the contrary, the word “comprise” and variations such as “comprises” or “comprising” will be understood to imply the inclusion of stated elements but not the exclusion of any other elements.

[0066] In addition, each of terms such as “unit,” “means,” “part,” and “member” described in the specification means a unit of an integrated element that performs at least one function or operation.

[0067] Figure 1 A block diagram of a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0068] The heat pump system for a vehicle according to an exemplary embodiment of the present invention selectively exchanges heat energy generated from refrigerant in condensation and evaporation with the coolant by using only low-temperature or high-temperature coolant to perform a cooling mode or a heating mode of the vehicle.

[0069] The heat pump system for a vehicle may adjust the temperature of the battery module 24 by using one refrigerator 30 in which a refrigerant and a coolant perform heat exchange, and use waste heat of the electric components 15 and the battery module 24 , thereby improving heating efficiency.

[0070] The heat pump system is suitable for hybrid vehicles or electric vehicles.

[0071] Herein, in a heat pump system for an electric vehicle, a cooling device 10 for cooling an electrical component 15, a battery cooling device 20 for cooling a battery module 24, a heating device 40 for heating the interior by using a coolant, a concentrated energy device 50 for exchanging coolant and refrigerant while circulating the refrigerant, and an air conditioner 70 for cooling the interior using the coolant can be connected to each other.

[0072] Reference Figure 1 The heat pump system includes a cooling device 10 , a battery cooling device 20 , a heating device 40 , a concentrated energy device 50 and an air conditioner 70 .

[0073] First, the cooling device 10 includes a radiator 12 connected to a coolant line 11 , a first water pump 14 , a first valve V1 , and a reservoir tank 16 .

[0074] The first radiator 12 is arranged at the front in the vehicle, and the cooling fan 13 is provided at the rear of the first radiator 12 to cool the coolant through heat exchange with surrounding air (eg, atmosphere) by operation of the cooling fan 13 .

[0075] In addition, the electric components 15 may include an electric power control unit (EPCU), a motor, an inverter, or an on-board charger (OBC).

[0076] The electric components 15 configured as above may be provided in the coolant line 11 to be cooled in a water-cooling manner.

[0077] Therefore, when the waste heat of the electric components 15 is recovered in the heating mode of the vehicle, the heat generated from the EPCU, the motor, the inverter, or the OBC can be recovered.

[0078] The cooling device 10 may circulate the coolant in the coolant line 11 so that the coolant is supplied to the electric components 15 provided in the coolant line 11 .

[0079] The battery cooling device 20 includes a battery coolant line 21 connected to the reservoir tank 16 through a second valve V2 and a battery module 24 , to which a second water pump 22 is connected.

[0080] The battery cooling apparatus 20 may selectively circulate the coolant in the battery module 24 through operation of the second water pump 22 .

[0081] Meanwhile, the battery module 24 may be formed as a water-cooled type that supplies power to the electric components 15 and is cooled by the coolant flowing along the battery coolant line 21 .

[0082] Herein, the first water pump 14 and the second water pump 22 may be electric water pumps.

[0083] In the present exemplary embodiment, the refrigerator 30 is provided in the first branch line 31 connected to the battery coolant line 21 through the second valve V2 .

[0084] The refrigerator 30 is connected to the refrigerant line 51 of the concentrated energy device 50 so that the refrigerant passes therethrough. That is, the refrigerator 30 may be a water-cooled heat exchanger into which the coolant flows.

[0085] Therefore, the refrigerator 30 is selectively connected to the second branch line 35 connecting the coolant line 11 and the first branch line 31 through the first valve V1, and is connected to the first branch line 31. The refrigerator 30 can adjust the temperature of the coolant by performing heat exchange between the coolant and the refrigerant selectively supplied from the concentrated energy device 50.

[0086] Herein, a first end of the second branch line 35 may be connected to the coolant line 11 through the first valve V1 , and a second end of the second branch line 35 may be connected to the first branch line 31 between the second valve V2 and the refrigerator 30 .

[0087] The second branch line 35 may be selectively opened and closed according to operations of the first valve V1 and the first water pump 14. In addition, the second branch line 35 may connect the coolant line 11 and the first branch line 31 according to operations of the first valve V1.

[0088] Meanwhile, in the heating mode of the vehicle, the first valve V1 may open the second branch line 35 and may close the coolant line 11 connected to the radiator 12 so that the coolant passing through the electric component 15 circulates without passing through the radiator 12 .

[0089] In this state, when the electric component 15 is overheated, the first valve V1 may open the coolant line 11 connected to the radiator 12 to allow some coolant passing through the electric component 15 to flow into the second branch line 35 and the remaining coolant to flow into the radiator 12 .

[0090] Therefore, some of the coolant cooled in the radiator 12 can be supplied to the electric components 15 , thereby preventing the electric components 15 from overheating.

[0091] In addition, the heating device 40 may include a first connecting line 41 connected to the coolant line 11 through a third valve V3 , and a third water pump 42 and a heater 62 provided in the first connecting line 41 to heat the vehicle interior by using high-temperature coolant.

[0092] Herein, a coolant heater 43 may be provided in the first connecting line 41 between the third water pump 42 and the heater 62 to selectively heat the coolant circulating in the first connecting line 41 .

[0093] When the temperature of the coolant supplied to the heater 62 is lower than the target temperature in the heating mode or low-temperature dehumidification mode of the vehicle, the coolant heater 43 is in the on-operation to heat the coolant circulating in the first connecting line 41 , thereby flowing the coolant with increased temperature into the heater 62 .

[0094] Alternatively, the coolant heater 43 may be operated when the battery module 24 is heated.

[0095] The coolant heater 43 may be an electric heater that operates according to power supply.

[0096] Meanwhile, in this exemplary embodiment, although the coolant heater 43 is provided on the first connecting line 41 , the present invention is not limited thereto. An air heater 45 for increasing the temperature of the outside air flowing in from the vehicle interior may be used instead of the coolant heater 43 .

[0097] The air heater 45 may be disposed within the heating, ventilation, and air conditioning (HVAC) module 60 rearward of the heater 62 toward the vehicle interior to selectively heat outside air passing through the heater 62 .

[0098] That is, the heating device 40 may be applied to one of the coolant heater 43 and the air heater 45 .

[0099] The heating device 40 constructed as above supplies the high-temperature coolant introduced from the cooling device 10 to the first connecting line 41 in the heating mode of the vehicle, or supplies the coolant whose temperature is increased while circulating through the first connecting line 41 to the heater 62 by the operation of the third water pump 42, thereby heating the vehicle interior.

[0100] In this exemplary embodiment, the air conditioner 70 may include a second connecting line 71 connected to the battery coolant line 21 through a fourth valve V4, and a fourth water pump 72 and a cooler 64 provided in the second connecting line 71 to cool the interior of the vehicle by using a low-temperature coolant.

[0101] The air conditioner 70 may supply the coolant having a reduced temperature to the cooler 64 while circulating the second connecting line 71 , so that the interior of the vehicle may be cooled in a cooling mode of the vehicle.

[0102] Herein, the heater 62 and the cooler 64 may be provided inside the HVAC module 60 .

[0103] In addition, the first water pump 14 , the second water pump 22 , the third water pump 42 , and the fourth water pump 72 may be electric water pumps.

[0104] The first valve V1 and the second valve V2 may be three-way valves capable of controlling flow rates, and the third valve V3 and the fourth valve V4 may be four-way valves.

[0105] Meanwhile, the HVAC module 60 includes an opening and closing door 66 that is provided between the heater 62 and the cooler 64 and is controlled so that the outside air passing through the cooler 64 selectively flows into the heater 62 according to a cooling mode, a heating mode, and a dehumidification mode of the vehicle.

[0106] That is, in the vehicle's heating mode, the shutter door 66 is opened to allow outside air passing through the cooler 64 to be introduced into the heater 62. Conversely, in the vehicle's cooling mode, the shutter door 66 closes the heater 62 so that outside air cooled while passing through the cooler 64 flows directly into the vehicle.

[0107] Herein, when the coolant heater 43 is not provided in the heating device 40 , the air heater 45 provided in the HVAC module 60 may be provided on the opposite side of the cooler 64 with the heater 62 interposed therebetween.

[0108] When the temperature of the coolant supplied to the heater 52 a is lower than the target temperature for interior heating, the air heater 45 may be operated to increase the temperature of the outside air passing through the heater 62 .

[0109] On the other hand, when the coolant heater 43 is not provided in the first connecting line 41 , the air heater 45 may be provided inside the HVAC module 60 .

[0110] That is, in the heat pump system according to the embodiment of the present invention, only one of the coolant heater 43 and the air heater 45 may be applied.

[0111] In the present exemplary embodiment, the concentrated energy (CE) device 50 is connected to the first and second connecting lines 41 and 71 to supply low-temperature coolant to the air conditioner 70 and high-temperature coolant to the heating apparatus 40 , respectively.

[0112] The CE device 50 performs selective heat exchange between heat energy generated by condensation and evaporation of the refrigerant circulating in the refrigerant line 51 and coolants supplied through the first and second connecting lines 41 and 71 , respectively.

[0113] Here, the refrigerant may be high-performance R152-a, R744 or R290 refrigerant.

[0114] That is, the high-temperature coolant is supplied to the heater 62 through the first connecting line 41 , and the low-temperature coolant is supplied to the cooler 64 through the second connecting line 71 .

[0115] Herein, the CE device 50 includes a condenser 53 , an expansion valve 55 , an evaporator 56 , and a compressor 59 .

[0116] First, the refrigerant circulates inside the condenser 53 , and the condenser 53 is provided between the third valve V3 and the heater 62 .

[0117] The condenser 53 may condense the refrigerant through heat exchange between the refrigerant and the coolant, and increase the temperature of the coolant.

[0118] Herein, the refrigerant circulating the heating device 40 may be supplied to the condenser 53 along the first connecting line 41 , so that the condenser 53 condenses the refrigerant through heat exchange with the refrigerant.

[0119] Therefore, in the heating mode of the vehicle, the condenser 53 can condense the refrigerant by exchanging heat with the refrigerant circulating in the first connecting line 41 and the high-temperature refrigerant supplied from the compressor 59 , and can supply the high-temperature refrigerant to the heater 62 through the first connecting line 41 .

[0120] The expansion valve 55 may be connected to the condenser 53 through the refrigerant line 51. The expansion valve 55 expands by receiving the refrigerant having passed through the condenser 53. The expansion valve 55 may be formed of a mechanical or electronic type.

[0121] The evaporator 56 is connected to the expansion valve 55 through the refrigerant line 51. The evaporator 56 is provided in the second connecting line 71 between the fourth valve V4 and the cooler 64 to cool the refrigerant circulating along the second connecting line 71 in the air conditioner 70.

[0122] The evaporator 46 evaporates the refrigerant through heat exchange with the refrigerant and can reduce the temperature of the refrigerant.

[0123] Herein, the refrigerant circulating the air conditioning device 70 may be supplied to the evaporator 56 along the second connecting line 71 , so that the evaporator 56 evaporates the refrigerant through heat exchange with the refrigerant.

[0124] Therefore, the evaporator 56 cools the refrigerant circulating in the vehicle cooling mode through the second connecting line 71 by exchanging heat with the low-temperature refrigerant circulating in the vehicle cooling mode and can supply the low-temperature refrigerant to the cooler 64 through the second connecting line 71 .

[0125] In addition, a compressor 59 is provided in the refrigerant line 51 between the evaporator 46 and the condenser 53. The compressor 59 compresses the gaseous refrigerant discharged from the evaporator 56 and can supply the compressed refrigerant to the condenser 53.

[0126] The accumulator 57 is provided in the refrigerant line 51 between the evaporator 56 and the compressor 59 .

[0127] Such an accumulator 57 improves the efficiency and durability of the compressor 59 by supplying only the gaseous refrigerant to the compressor 59 .

[0128] Herein, the refrigerator 30 may be provided in the refrigerant line 51 between the evaporator 56 and the accumulator 57 .

[0129] In the present exemplary embodiment, the refrigerator 30 , the condenser 53 , and the evaporator 56 may be water-cooled heat exchangers into which the coolant flows.

[0130] Meanwhile, when cooling the battery module 24 with the refrigerant, the refrigerator 30 may lower the temperature of the coolant passing through the inside of the refrigerator 30 by using the refrigerant of low temperature supplied from the evaporator 56 .

[0131] Therefore, by flowing the coolant having a lower temperature while passing through the refrigerator 30 , the battery module 24 can be cooled more efficiently.

[0132] On the other hand, although not shown in the drawings, an internal heat exchanger (not shown) may be provided in the refrigerant line 51 between the evaporator 56 and the compressor 59 .

[0133] The refrigerant line 51 connecting the condenser 53 and the expansion valve 55 and the refrigerant line 51 connecting the evaporator 56 and the compressor 59 may be connected to internal heat exchangers, respectively.

[0134] The internal heat exchanger further condenses the refrigerant condensed by the condenser 53 by exchanging heat with the low-temperature refrigerant discharged from the evaporator 56 , and then introduces the further condensed refrigerant into the expansion valve 55 .

[0135] That is, the condensed refrigerant discharged from the condenser 53 and the low-temperature refrigerant discharged from the evaporator 56 are respectively introduced into the internal heat exchanger. Therefore, the internal heat exchanger additionally exchanges heat between the low-temperature refrigerant and the condensed refrigerant to further reduce the temperature of the refrigerant and increase the condensation amount.

[0136] As described above, since the internal heat exchanger further condenses the refrigerant that has been condensed in the condenser 53, recooling of the refrigerant can be increased, and thus, the coefficient of performance, which is a cooling performance coefficient relative to the power consumption of the compressor, can be improved.

[0137] In the following, reference will be made to Figures 2 to 10 Operation of the heat pump system for a vehicle according to an exemplary embodiment of the present invention configured as above in each mode is described.

[0138] First, refer to Figure 2 Operation of the heat pump system for a vehicle according to an exemplary embodiment of the present invention when cooling the electric component 15 and the battery module 24 by using the coolant is described.

[0139] Figure 2 A diagram illustrating an operation state of cooling electric components and a battery module using a coolant in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0140] Reference Figure 2 , the first branch line 31 and the second branch line 35 are closed by the operations of the first valve V1 and the second valve V2, respectively.

[0141] In addition, the battery coolant line 21 is connected to the reservoir tank 16 by the operation of the second valve V2 .

[0142] In this state, the first water pump 14 operates to cool the electric components 15 in the cooling device 10 . Therefore, the coolant cooled in the radiator 12 and stored in the reservoir tank 16 is supplied to the electric components 15 .

[0143] In the battery cooling device 20 , the second water pump 22 operates to cool the battery module 24 .

[0144] Then, the coolant stored in the reservoir tank 16 is supplied to the battery module 24 by the operation of the second valve V2 while circulating through the battery coolant line 21 connected to the reservoir tank 16 .

[0145] That is, by operations of the first water pump 14 and the second water pump 22 , the coolant cooled in the radiator 12 and stored in the reservoir tank 16 circulates through the coolant line 11 and the battery coolant line 21 , respectively, to effectively cool the electric components 15 and the battery module 24 .

[0146] Since the cooling mode of the vehicle is not activated, the CE device 50 , the heating apparatus 40 , and the air conditioner 70 are not operated.

[0147] On the other hand, although it has been described in the present exemplary embodiment that both the electrical component 15 and the battery module 24 are cooled, the present invention is not limited to this, and when one of the electrical component 15 and the battery module 24 is cooled separately, the first water pump 14 and the second water pump 22 can be selectively operated.

[0148] Will refer to Figure 3 The operation of the case where the battery module 24 is cooled in the cooling mode of the vehicle is described.

[0149] Figure 3 An operation state diagram showing cooling of a battery module by using a refrigerant in a cooling mode of a vehicle in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0150] Reference Figure 3 In the cooling device 10 , the coolant circulates in the coolant line 11 by the operation of the first water pump 14 . Thus, the coolant cooled by the radiator 12 circulates to the electric component 15 .

[0151] Herein, the second branch line 35 is closed by the operation of the first valve V1 .

[0152] In the heating device 40 , the coolant line 11 and the first connecting line 41 are connected by the operation of the third valve V3 , so that the coolant supplied from the cooling device 11 circulates.

[0153] Therefore, the coolant cooled by the radiator 12 may be supplied to the condenser 53 by operations of the first water pump 14 and the third water pump 42 .

[0154] In the battery cooling device 20 , the first branch line 31 is opened by the operation of the second valve V2 . Based on the first branch line 31 , a portion of the battery coolant line 21 connected to the reservoir tank 16 is closed.

[0155] In this state, by operation of the second water pump 22 , the coolant that has passed through the refrigerator 30 can be supplied to the battery module 24 while circulating along the first branch line 31 and the battery coolant line 21 connected to the first branch line 31 without passing through the reservoir tank 16 .

[0156] That is, in the battery cooling device 20, by connecting the opened first branch line 31 to the battery coolant line 21 while the connection portion connected to the liquid storage tank 16 is closed by the operation of the second valve V2, a closed loop through which the coolant circulates independently can be formed.

[0157] In the air conditioner 70 , the second connecting line 71 may form an independent closed loop independent of the battery coolant line 21 through the operation of the fourth valve V4 .

[0158] Therefore, in the air conditioner 70 , the coolant circulates along the second connecting line 71 by the operation of the fourth water pump 72 , and the coolant of low temperature that has passed through the evaporator 56 may be supplied to the cooler 64 .

[0159] In the CE device 50 , each component operates to cool the interior of the vehicle. Therefore, refrigerant circulates along the refrigerant line 51 .

[0160] The heating device 40 supplies the coolant supplied from the cooling device 10 by the operation of the third water pump 42 to the condenser 53 .

[0161] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 using the coolant circulating along the first connecting line 41 .

[0162] In addition, the evaporator 56 exchanges heat with the low-temperature internal evaporating refrigerant through the operation of the fourth water pump 72 .

[0163] The fourth water pump 72 operates to supply the low-temperature refrigerant that has passed through the evaporator 56 to the cooler 64 along the second connecting line 71 .

[0164] That is, the refrigerant circulating along the refrigerant line 51 in the CE device 50 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0165] Next, the refrigerant expands through the expansion valve 55 and evaporates in the evaporator 46 .

[0166] In this case, the refrigerant evaporated from the evaporator 56 cools the coolant introduced through the second connecting line 71. Therefore, the coolant passes through the evaporator 56 to be cooled at a low temperature, and the cooled coolant is supplied to the cooler 64 through the second connecting line 71.

[0167] The refrigerant having passed through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0168] Herein, the outside air introduced into the HVAC module 60 exchanges heat with the low-temperature coolant introduced into the cooler 64 to be cooled.

[0169] At this time, the opening and closing door 66 reduces a portion of the cooled outside air that has passed through the heater 62 so as not to pass through the heater 62. Therefore, the cooled outside air can be directly introduced into the interior of the vehicle to cool the interior of the vehicle.

[0170] The coolant passing through the refrigerator 30 circulates in the battery coolant line 21 and the first branch line 31 without passing through the reservoir tank 16 to cool the battery module by operation of the second water pump 22 .

[0171] The refrigerant passing through the refrigerator 30 is cooled by heat exchange with the refrigerant supplied from the evaporator 56 to the refrigerator 30. The refrigerant cooled in the refrigerator 30 is supplied to the battery module 24. Therefore, the battery module 24 is cooled by the cooled refrigerant.

[0172] That is, the refrigerant heated by cooling the battery modules 24 is cooled by heat exchange with the low-temperature, low-pressure refrigerant in the refrigerator 30. The cooled coolant is supplied to the battery modules 24 again through the battery coolant line 21 and the first branch line 31.

[0173] Therefore, the coolant can effectively cool the battery module 24 while repeating the above-mentioned operation.

[0174] While repeating the above process, the coolant may cool the interior of the vehicle in the cooling mode, and the coolant may be cooled by heat exchange while passing through the refrigerator 30 .

[0175] The low-temperature refrigerant cooled in the refrigerator 30 flows into the battery module 24. Therefore, the battery module 24 can be effectively cooled by the supplied low-temperature refrigerant.

[0176] In this exemplary embodiment, reference will be made to Figure 4 An operation for cooling the battery module 24 during fast charging of the battery module 24 in the cooling mode of the vehicle is described.

[0177] Figure 4 An operation state diagram for cooling a battery module when the battery module is quickly charged in a cooling mode of a vehicle in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0178] Reference Figure 4 , in the cooling device 10 , the coolant circulates in the coolant line 11 by the operation of the first water pump 14 . Thus, the coolant cooled by the radiator 12 circulates to the electric component 15 .

[0179] Herein, the second branch line 35 is closed by the operation of the first valve V1 .

[0180] In the heating device 40 , the coolant line 11 and the first connecting line 41 are connected by the operation of the third valve V3 , so that the coolant supplied from the cooling device 11 circulates.

[0181] Therefore, the coolant cooled by the radiator 12 may be supplied to the condenser 53 by the operations of the first water pump 14 and the third water pump 42 .

[0182] In the battery cooling device 20 , the first branch line 31 is opened by the operation of the second valve V2 . Based on the first branch line 31 , a portion of the battery coolant line 21 connected to the reservoir tank 16 is closed.

[0183] In this state, by operation of the second water pump 22 , the coolant that has passed through the refrigerator 30 can be supplied to the battery module 24 while circulating along the first branch line 31 and the battery coolant line 21 connected to the first branch line 31 without passing through the reservoir tank 16 .

[0184] That is, in the battery cooling device 20, by connecting the opened first branch line 31 to the battery coolant line 21 while the connection portion connected to the liquid storage tank 16 is closed by the operation of the second valve V2, a closed loop through which the coolant circulates independently can be formed.

[0185] In the air conditioner 70, the second connecting line 71 is connected to the battery coolant line 21 by the operation of the fourth valve V4. Therefore, in the air conditioner 70, the coolant is supplied from the battery cooling device 20 and can be circulated along the second connecting line 71 by the operation of the fourth water pump 72.

[0186] That is, in the air conditioner 70 , the coolant circulates from the battery cooling device 20 along the second connecting line 71 , and the coolant of low temperature that has passed through the evaporator 56 may be supplied to the cooler 64 .

[0187] In the CE device 50 , each component operates to cool the interior of the vehicle. Therefore, refrigerant circulates along the refrigerant line 51 .

[0188] The heating device 40 supplies the coolant supplied from the cooling device 10 by the operation of the third water pump 42 to the condenser 53 .

[0189] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 using the coolant circulating along the first connecting line 41 .

[0190] In addition, the evaporator 56 exchanges heat with the low-temperature internal evaporating refrigerant through the operation of the fourth water pump 72 .

[0191] The fourth water pump 72 operates to supply the low-temperature refrigerant that has passed through the evaporator 56 to the cooler 64 along the second connecting line 71 .

[0192] That is, the refrigerant circulating along the refrigerant line 51 in the CE device 50 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0193] Next, the refrigerant expands through the expansion valve 55 and evaporates in the evaporator 46 .

[0194] In this case, the refrigerant evaporated from the evaporator 56 cools the coolant introduced through the second connecting line 71 .

[0195] Therefore, the coolant passes through the evaporator 56 to be cooled at a low temperature, and the cooled coolant is supplied to the refrigerator 30 along the battery coolant line 21 and the first branch line 31 through the fourth valve V4 .

[0196] The coolant passing through the refrigerator 30 flows along the battery coolant line 21 and the first branch line 31 by operation of the second water pump 22 without passing through the reservoir tank 16 , thereby cooling the battery module 24 .

[0197] Here, the coolant supplied to the refrigerator 30 is heat-exchanged with the refrigerant passing through the refrigerator 30 and can reduce its temperature. The coolant with reduced temperature can be supplied to the battery module 24 along the battery coolant line 21 and can effectively cool the battery module 24.

[0198] That is, when the battery module 24 is quickly charged in the cooling mode of the vehicle, the amount of heat generated by the battery module 24 increases, thereby raising the temperature of the battery module 24 .

[0199] Therefore, the coolant, whose temperature is reduced while sequentially passing through the evaporator 56 and the refrigerator 30 , may more effectively cool the battery module 24 while passing through the battery module 24 .

[0200] Then, the coolant that cools the battery module 24 is supplied to the cooler 64 along the second connecting line 71 connected by the operation of the fourth valve V4 .

[0201] In this way, the coolant can effectively cool the battery module 24 while repeatedly performing the above-mentioned operation.

[0202] Meanwhile, the refrigerant having passed through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0203] Herein, the outside air introduced into the HVAC module 60 exchanges heat with the low-temperature coolant introduced into the cooler 64 to be cooled.

[0204] At this time, the opening and closing door 66 reduces a portion of the cooled outside air that has passed through the heater 62 so as not to pass through the heater 62. Therefore, the cooled outside air can be directly introduced into the interior of the vehicle to cool the interior of the vehicle.

[0205] That is, while the above-described process is repeatedly performed, when the battery module 24 is quickly charged in the cooling mode of the vehicle, the coolant cools the interior of the vehicle and the refrigerant may cool the coolant passing through the evaporator 56 and the refrigerator 30 .

[0206] The low-temperature refrigerant, which is cooled while sequentially passing through the evaporator 56 and the refrigerator 30, flows into the battery module 24. Therefore, the battery module 24 can be effectively cooled by the supplied low-temperature coolant.

[0207] In this exemplary embodiment, reference will be made to Figure 5 The operation in the case of recovering waste heat of the electric component 15 in the heating mode of the vehicle will be described.

[0208] Figure 5 An operational state diagram illustrating waste heat recovery of electric components according to a heating mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0209] Reference Figure 5 , in the cooling device 10 , the first water pump 14 is operated to circulate the coolant.

[0210] Here, the second branch line 35 is opened by the operation of the first valve V1. At the same time, based on the second branch line 35, a portion of the coolant line 11 connected to the radiator 12 and a portion of the coolant line 11 connecting the radiator 12 and the reservoir tank 16 are closed by the operation of the first valve V1.

[0211] In the battery cooling device 20 , a portion of the first branch line 31 connected to the second branch line 35 is opened, and based on the first branch line 31 , the remaining portion of the battery coolant line 21 except the battery coolant line 21 connected to the reservoir tank 16 is closed by operation of the second valve V2 .

[0212] That is, the battery coolant line 21 connecting the second water pump 22 and the battery module 24 is closed, and the operation of the second water pump 22 is stopped. In addition, the air conditioner 70 is stopped.

[0213] In this state, the coolant passing through the electric component 15 may be supplied to the refrigerator 30 along the opened branch line 35 and a portion of the first branch line 31 without passing through the radiator 12 by the operation of the first water pump 14 .

[0214] The coolant discharged from the refrigerator 30 flows into the reservoir tank 16 via the first branch line 31 and the opened battery coolant line 21 .

[0215] That is, in the cooling device 10 , the coolant line 11 is connected to the first branch line 31 through the opened second branch line 35 .

[0216] Therefore, the coolant passing through the electric component 15 continuously circulates along the coolant line 11, the second branch line 35, the portion of the first branch line 31 and the opened portion of the battery coolant line 21 without passing through the radiator 12, and absorbs waste heat from the electric component 15, causing the temperature to rise.

[0217] The coolant with the increased temperature may be supplied to the refrigerator 30 provided at the first branch line 31. That is, the waste heat generated by the electric component 15 increases the temperature of the coolant circulating in the coolant line 11, the second branch line 35, the portion of the first branch line 31, and the opened portion of the battery coolant line 21.

[0218] In the heating device 40 , the coolant circulates along the first connecting line 41 by the operation of the third water pump 42 .

[0219] The coolant line 11 and the first connecting line 41 may form an independent closed loop through the operation of the third valve V3 .

[0220] Therefore, by the operation of the third water pump 42 , the coolant circulating through the first connecting line 41 may be supplied to the condenser 53 after passing through the heater 62 .

[0221] Herein, when the temperature of the coolant circulating along the first connecting line 41 is lower than a target temperature, the coolant heater 43 is operated so that the coolant circulating in the first connecting line 41 may be heated.

[0222] On the other hand, when the air heater 45 is applied instead of the coolant heater 43 , when the temperature of the outside air passing through the heater 62 is lower than the target temperature, the air heater 45 is operated and the outside air introduced into the vehicle interior can be heated.

[0223] In the present exemplary embodiment, in the CE device 50 , each constituent element is operated to heat the vehicle interior.

[0224] The heating device 40 supplies the coolant supplied to the cooling device 10 to the condenser 53 through the operation of the third water pump 42 .

[0225] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 by using the coolant circulating along the first connecting line 41 .

[0226] That is, in the CE device 50 , the refrigerant circulating along the refrigerant line 51 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0227] Then, the refrigerant discharged from the condenser 53 expands in the expansion valve 55 and evaporates in the evaporator 56 .

[0228] The refrigerant passing through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0229] The coolant having absorbed waste heat of the electric components 15 and increased in temperature is recovered by causing the refrigerant supplied to the refrigerator 30 to increase in temperature, while the coolant passes through the refrigerator 30 by operation of the first water pump 14 .

[0230] That is, the refrigerator 30 evaporates the refrigerant supplied from the evaporator 56 through heat exchange with the refrigerant having a higher temperature while passing through the electric components 15 , thereby recovering waste heat of the electric components 15 .

[0231] Next, the refrigerant that has passed through the refrigerator 30 is supplied to the accumulator 57 along the refrigerant line 51 .

[0232] The refrigerant supplied to the accumulator 57 is separated into gas and liquid. Of the refrigerant separated into gas and liquid, the gas refrigerant is supplied to the compressor 59.

[0233] The refrigerant compressed with high temperature and high pressure from the compressor 59 flows into the condenser 53 .

[0234] Herein, the refrigerant supplied to the condenser 53 may increase the temperature of the refrigerant by exchanging heat with the refrigerant circulating through the first connecting line 41. The coolant having the increased temperature is supplied to the heater 62.

[0235] At the same time, the shutter door 66 is opened so that the outside air introduced into the HVAC module 60 and passed through the cooler 64 passes through the heater 62 .

[0236] Therefore, the outside air introduced from the outside flows into the interior in an uncooled temperature state when passing through the cooler 64, which is not supplied with coolant. The introduced outside air is converted into a high temperature state while passing through the heater 62 to be introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0237] That is, the heat pump system according to the present exemplary embodiment is used to increase the temperature of the refrigerant by using waste heat of the electric components 15 when vehicle heating is required, thereby reducing power consumption of the compressor 59 and improving heating efficiency.

[0238] In this exemplary embodiment, reference will be made to Figure 6 The operation in the case of recovering waste heat of the battery module 24 in the heating mode of the vehicle will be described.

[0239] Figure 6 An operational state diagram illustrating waste heat recovery of a battery module in a heating mode in a heat pump system for a vehicle according to an exemplary embodiment of the present invention is shown.

[0240] Reference Figure 6 , the second branch line 35 is closed by the operation of the first valve V1, and the cooling device 10 is stopped. In addition, the air conditioner 70 is stopped.

[0241] In the battery cooling device 20 , the reservoir tank 16 and the battery coolant line 21 are connected by the operation of the second valve V2 , and the first branch line 31 is opened.

[0242] At this time, a portion of the battery coolant line 21 connecting the reservoir tank 16 and the refrigerator 30 is closed based on the first branch line 31 .

[0243] Therefore, the coolant passing through the battery module 24 by the operation of the second water pump 22 may be supplied to the refrigerator 30 along the opened first branch line 31 and the battery coolant line 21 .

[0244] The coolant discharged from the refrigerator 30 flows into the battery module 24 via the first branch line 31 and the opened battery coolant line 21 .

[0245] Therefore, the coolant passing through the battery module 24 continuously circulates along the battery coolant line 21 and the first branch line 35 and absorbs waste heat from the battery module 24 , causing the temperature to increase.

[0246] The coolant having the increased temperature may be supplied to the refrigerator 30 provided at the first branch line 31. That is, the waste heat generated by the battery module 24 increases the temperature of the coolant circulating through the battery coolant line 21 and the first branch line 31.

[0247] In the heating device 40 , the coolant circulates along the first connecting line 41 by the operation of the third water pump 42 .

[0248] The first connecting pipeline 41 can form an independent closed loop through the operation of the third valve V3.

[0249] Therefore, by the operation of the third water pump 42 , the coolant circulating through the first connecting line 41 may be supplied to the condenser 53 after passing through the heater 62 .

[0250] Herein, when the temperature of the coolant circulating along the first connecting line 41 is lower than a target temperature, the coolant heater 43 is operated so that the coolant circulating in the first connecting line 41 may be heated.

[0251] On the other hand, when the coolant heater 43 is replaced with the air heater 45 , when the temperature of the outside air passing through the heater 62 is lower than the target temperature, the air heater 45 is operated and the outside air introduced into the vehicle interior can be heated.

[0252] In the present exemplary embodiment, in the CE device 50 , each constituent element is operated to heat the vehicle interior.

[0253] The heating device 40 supplies the coolant supplied to the cooling device 10 to the condenser 53 through the operation of the third water pump 42 .

[0254] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 by using the coolant circulating along the first connecting line 41 .

[0255] That is, in the CE device 50 , the refrigerant circulating along the refrigerant line 51 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0256] Then, the refrigerant discharged from the condenser 53 expands in the expansion valve 55 and evaporates in the evaporator 56 .

[0257] The refrigerant passing through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0258] By the operation of the second water pump 22 , the coolant that absorbs waste heat of the battery module 24 and whose temperature is increased is recovered by increasing the temperature of the refrigerant supplied to the refrigerator 30 while passing through the refrigerator 30 .

[0259] That is, the refrigerator 30 allows the refrigerant supplied from the evaporator 56 to evaporate by exchanging heat with the refrigerant having a higher temperature while passing through the battery module 24 , thereby recovering waste heat from the battery module 24 .

[0260] Next, the refrigerant that has passed through the refrigerator 30 is supplied to the accumulator 57 along the refrigerant line 51 .

[0261] The refrigerant supplied to the accumulator 57 is separated into gas and liquid. Of the refrigerant separated into gas and liquid, the gas refrigerant is supplied to the compressor 59.

[0262] The refrigerant compressed with high temperature and high pressure from the compressor 59 flows into the condenser 53 .

[0263] Herein, the refrigerant supplied to the condenser 53 may increase the temperature of the refrigerant by exchanging heat with the refrigerant circulating through the first connecting line 41. The coolant having the increased temperature is supplied to the heater 62.

[0264] At the same time, the shutter door 66 is opened so that the outside air introduced into the HVAC module 60 and passed through the cooler 64 passes through the heater 62 .

[0265] Therefore, the outside air introduced from the outside flows into the interior in an uncooled temperature state when passing through the cooler 64, which is not supplied with coolant. The introduced outside air is converted into a high temperature state while passing through the heater 62 to be introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0266] That is, the heat pump system according to the present exemplary embodiment is used to increase the temperature of the refrigerant by using the waste heat of the battery module 24 when vehicle heating is required, thereby reducing power consumption of the compressor 59 and improving heating efficiency.

[0267] On the other hand, in the present exemplary embodiment, as an embodiment, waste heat of the electric component 15 and the battery module 24 are recovered separately, but the embodiment is not limited thereto, and waste heat of the electric component 15 and the battery module 24 may be recovered together.

[0268] In the vehicle's heating mode, the Figure 7 Operation using waste heat of the electric component 15 without operation of the CE device 50 is described.

[0269] Figure 7 An operational state diagram for performing a heating mode using waste heat of electric components in a heat pump system of a vehicle according to an exemplary embodiment of the present invention is shown.

[0270] Reference Figure 7 , in the cooling device 10, the first water pump 14 is operated to circulate the coolant. At this time, the CE device 50 and the air conditioner 70 are stopped.

[0271] Here, the second branch line 35 is opened by the operation of the first valve V1. At the same time, a portion of the coolant line 11 connected to the radiator 12 based on the second branch line 35 and a portion of the coolant line 11 connecting the radiator 12 and the reservoir tank 16 are closed by the operation of the first valve V1.

[0272] In the battery cooling device 20 , by operation of the second valve V2 , the portion of the first branch line 31 connected to the second branch line 35 is opened, and based on the first branch line 31 , the remaining portion of the battery coolant line 21 excluding the battery coolant line 21 connected to the reservoir tank 16 is closed.

[0273] That is, the battery coolant line 21 connecting the second water pump 22 and the battery module 24 is closed, and the operation of the second water pump 22 is stopped.

[0274] In this state, the coolant whose temperature is increased while passing through the electric components 15 by the operation of the first water pump 14 is supplied to the heater 62 along the first connecting line 41 connected through the third valve V3 without passing through the radiator 12 .

[0275] Here, the refrigerant flowing into the first connecting line 41 passes through the heater 62 by the operation of the third water pump 42. At this time, when the temperature of the coolant circulating along the first connecting line 41 is lower than the target temperature, the coolant heater 43 is operated so that the coolant circulating in the first connecting line 41 can be heated.

[0276] On the other hand, when the air heater 45 coolant is applied instead of the heater 43 , the air heater 45 may be selectively operated according to the temperature of the outside air passing through the heater 62 .

[0277] That is, when the temperature of the outside air passing through the heater 62 is lower than the target temperature, the air heater 45 is operated, and the outside air flowing into the vehicle interior may be heated.

[0278] When the temperature of the outside air that has completed heat exchange with the high-temperature coolant and passed through the heater 62 is lower than a set temperature or a target heating temperature, the air heater 45 is operated.

[0279] As a result, when the air heater 45 is operated, the outside air may be heated while passing through the air heater 45 to be introduced into the vehicle interior in a state where the temperature is increased.

[0280] In the present exemplary embodiment, the coolant discharged from the heater 62 is supplied to the refrigerator 30 along the first connecting line 41 , the third valve V3 , the coolant line 11 , the second branch line 35 , and a portion of the first branch line 31 without passing through the radiator 12 .

[0281] Herein, since the refrigerant supplied to the refrigerator 30 does not flow into the refrigerator 30 , the refrigerant may pass through the refrigerator 30 without exchanging heat with the refrigerant.

[0282] The coolant discharged from the refrigerator 30 passes through the first branch line 31 and the opened battery coolant line 21 in sequence, and is introduced into the reservoir tank 16 again.

[0283] That is, the coolant having passed through the electric component 15 continues to circulate along the coolant line 11, the first connecting line 41, the second branch line 35, the first branch line 31, and a portion of the battery coolant line 21 without passing through the radiator 12, and absorbs waste heat from the electric component 15, causing its temperature to rise.

[0284] The coolant having a temperature that has been increased is introduced into the first connecting line 41 connected to the coolant line 11 by the operation of the third valve V3. Then, the high-temperature refrigerant introduced into the first connecting line 41 is supplied to the heater 62.

[0285] Herein, the opening and closing door 66 is opened so that the outside air flowing into the HVAC module 60 passes through the heater 62 .

[0286] Therefore, the outside air introduced from the outside flows in a room temperature state, in which the outside air is not cooled when passing through the cooler 64 to which no refrigerant is supplied. The introduced outside air can be converted to a high temperature state while passing through the heater 62 and flows into the vehicle, thereby heating the interior of the vehicle.

[0287] In other words, according to the embodiment of the present invention, waste heat generated in the electrical component 15 can be recovered while repeating the above process and used for internal heating, thereby reducing power consumption and improving overall heating efficiency.

[0288] On the other hand, in the process of heating the vehicle interior by recovering waste heat of the electric component 15 using the coolant, when the electric component 15 is overheated, the portion of the coolant line 11 connected to the radiator 12 and the portion of the coolant line 11 connecting the radiator 12 and the reservoir tank 16 are opened by the operation of the first valve V1.

[0289] Therefore, the remaining coolant that is not supplied to the heater 62 is cooled by the radiator 12 .

[0290] The completely cooled coolant can recover waste heat while passing through the electric components 15 and can simultaneously effectively cool the electric components 15 together with the coolant introduced into the reservoir tank 16 through the second branch line 35 , the first branch line 31 and a portion of the battery coolant line 21 .

[0291] Specifically, when the electric component 15 is overheated, the first valve V1 may open the coolant line 11 connected to the radiator 12 to allow some coolant passing through the electric component 15 to flow into the second branch line 35 and the remaining coolant to flow into the radiator 12 .

[0292] Therefore, some of the coolant cooled in the radiator 12 can be supplied to the electric components 15 , thereby preventing the electric components 15 from overheating.

[0293] Therefore, according to the embodiment of the present invention, it is possible to recover waste heat generated in the electrical component 15 and use the waste heat for internal heating, thereby reducing power consumption and improving overall heating efficiency.

[0294] At the same time, according to an embodiment of the present invention, some coolant can be introduced into the radiator 12 through the operation control of the first valve V1 capable of distributing the flow to be cooled, and then supplied to the electrical components 15, thereby effectively cooling the electrical components 15 and ensuring the cooling performance of the electrical components 15.

[0295] Will refer to Figure 8 The operation of the low-temperature dehumidification mode of the vehicle according to the present exemplary embodiment will be described.

[0296] Figure 8 An operational state diagram of a low-temperature dehumidification mode in a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown.

[0297] Herein, the low-temperature dehumidification mode is a mode operated when dehumidification is required in the vehicle interior in the heating mode of the vehicle.

[0298] Reference Figure 8 , when the waste heat of the electric components 15 is sufficient, the heat pump system can recover the waste heat of the electric components 15 and use it for interior heating of the vehicle.

[0299] First, in the cooling device 10 , the first water pump 14 is operated to circulate the coolant.

[0300] Here, the second branch line 35 is opened by the operation of the first valve V1. At the same time, the operation of the first valve V1 closes a portion of the coolant line 11 connected to the radiator 12 and a portion of the coolant line 11 connecting the radiator 12 and the reservoir tank 16 based on the second branch line 35.

[0301] In the battery cooling device 20 , by operation of the second valve V2 , the portion of the first branch line 31 connected to the second branch line 35 is opened, and based on the first branch line 31 , the remaining portion of the battery coolant line 21 excluding the battery coolant line 21 connected to the reservoir tank 16 is closed.

[0302] Therefore, the battery coolant line 21 connecting the second water pump 22 and the battery module 24 is closed, and the operation of the second water pump 22 is stopped. That is, the battery cooling device 20 is stopped.

[0303] In this state, the coolant passing through the electric component 15 may be supplied to the refrigerator 30 along the opened branch line 35 and a portion of the first branch line 31 without passing through the radiator 12 by the operation of the first water pump 14 .

[0304] The coolant discharged from the refrigerator 30 flows into the reservoir tank 16 via the first branch line 31 and the opened battery coolant line 21 .

[0305] That is, in the cooling device 10 , the coolant line 11 is connected to the first branch line 31 through the opened second branch line 35 .

[0306] Therefore, the coolant passing through the electric component 15 continuously circulates along the coolant line 11, the second branch line 35, the portion of the first branch line 31 and the opened portion of the battery coolant line 21 without passing through the radiator 12, and absorbs waste heat from the electric component 15, causing the temperature to rise.

[0307] The coolant with the increased temperature may be supplied to the refrigerator 30 provided at the first branch line 31. That is, the waste heat generated by the electric component 15 increases the temperature of the coolant circulating in the coolant line 11, the second branch line 35, the portion of the first branch line 31, and the opened portion of the battery coolant line 21.

[0308] In the heating device 40 , the coolant circulates along the first connecting line 41 by the operation of the third water pump 42 .

[0309] The coolant line 11 and the first connecting line 41 may form an independent closed loop through the operation of the third valve V3 .

[0310] Therefore, by the operation of the third water pump 42 , the coolant circulating through the first connecting line 41 may be supplied to the condenser 53 after passing through the heater 62 .

[0311] Herein, when the temperature of the coolant circulating along the first connecting line 41 is lower than a target temperature, the coolant heater 43 is operated so that the coolant circulating in the first connecting line 41 may be heated.

[0312] On the other hand, when the air heater 45 is applied instead of the coolant heater 43 , when the temperature of the outside air passing through the heater 62 is lower than the target temperature, the air heater 45 is operated and the outside air introduced into the vehicle interior can be heated.

[0313] In the present exemplary embodiment, in the CE device 50 , each constituent element is operated to heat the vehicle interior.

[0314] The heating device 40 supplies the coolant supplied to the cooling device 10 to the condenser 53 through the operation of the third water pump 42 .

[0315] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 by using the coolant circulating along the first connecting line 41 .

[0316] Meanwhile, in the air conditioner 70 , the coolant circulates along the second connecting line 71 by the operation of the fourth water pump 72 .

[0317] Therefore, the evaporator 56 exchanges heat between the coolant circulating along the second connecting line 71 and the low-temperature refrigerant evaporated therein by the operation of the fourth water pump 72 .

[0318] The fourth water pump 72 operates to supply the low-temperature refrigerant that has passed through the evaporator 56 to the cooler 64 along the second connecting line 71 .

[0319] Therefore, in the air conditioner 70 , the coolant circulates along the second connecting line 71 by the operation of the fourth water pump 72 , and the coolant of low temperature that has passed through the evaporator 56 may be supplied to the cooler 64 .

[0320] That is, the refrigerant circulating along the refrigerant line 51 in the CE device 50 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0321] Next, the refrigerant expands through the expansion valve 55 and evaporates in the evaporator 46 .

[0322] In this case, the refrigerant evaporated from the evaporator 56 cools the coolant introduced through the second connecting line 71. Therefore, the coolant passes through the evaporator 56 to be cooled at a low temperature, and the cooled coolant is supplied to the cooler 64 through the second connecting line 71.

[0323] Meanwhile, the refrigerant having passed through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0324] The coolant that absorbs waste heat of the electric components 15 and has its temperature increased is recovered by increasing the temperature of the refrigerant supplied to the refrigerator 30 , while the coolant passes through the refrigerator 30 by operation of the first water pump 14 .

[0325] That is, the refrigerator 30 evaporates the refrigerant supplied from the evaporator 56 through heat exchange with the refrigerant having a higher temperature while passing through the electric components 15 , thereby recovering waste heat of the electric components 15 .

[0326] Next, the refrigerant that has passed through the refrigerator 30 is supplied to the accumulator 57 along the refrigerant line 51 .

[0327] The refrigerant supplied to the accumulator 57 is separated into gas and liquid. Of the refrigerant separated into gas and liquid, the gas refrigerant is supplied to the compressor 59.

[0328] The refrigerant compressed with high temperature and high pressure from the compressor 59 flows into the condenser 53 .

[0329] Herein, the refrigerant supplied to the condenser 53 may increase the temperature of the refrigerant by exchanging heat with the refrigerant circulating through the first connecting line 41. The coolant having the increased temperature is supplied to the heater 62.

[0330] At the same time, the shutter door 66 is opened so that the outside air introduced into the HVAC module 60 and passed through the cooler 64 passes through the heater 62 .

[0331] That is, the outside air introduced into the HVAC module 60 is dehumidified while passing through the cooler 64 to which the refrigerant of low temperature is supplied.

[0332] The outdoor air dehumidified when passing through the cooler 64 is converted into a high-temperature state when passing through the heater 62 and flows into the vehicle interior, thereby heating and dehumidifying the vehicle interior.

[0333] That is, in the low temperature dehumidification mode, the heat pump system according to the exemplary embodiment absorbs waste heat of the electric components 15 and uses the absorbed waste heat to increase the temperature of the refrigerant to reduce power consumption of the compressor 59 and improve heating efficiency.

[0334] In addition, the heat pump system may perform interior dehumidification together by operating the air conditioner 70 to selectively supply a low-temperature refrigerant to the chiller 64 .

[0335] In this exemplary embodiment, reference will be made to Figure 9 The operation according to the high temperature dehumidification mode of the vehicle is described.

[0336] Figure 9 An operation state diagram of a high-temperature dehumidification mode in a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown.

[0337] Herein, the high-temperature dehumidification mode is a mode in which dehumidification is performed inside the vehicle in the cooling mode of the vehicle.

[0338] Reference Figure 9 In the cooling device 10 , the first water pump 14 is operated to circulate the coolant. Thus, the coolant cooled by the radiator 12 circulates to the electric component 15 .

[0339] Herein, the second branch line 35 is closed by the operation of the first valve V1 .

[0340] In the battery cooling device 20 , the battery coolant line 21 and the first branch line 31 are closed by the operation of the second valve V2 .

[0341] In the heating device 40 , the coolant line 11 and the first connecting line 41 are connected by the operation of the third valve V3 , so that the coolant supplied from the cooling device 11 circulates.

[0342] Therefore, the coolant cooled by the radiator 12 may be supplied to the condenser 53 through the operations of the first water pump 14 and the third water pump 42 .

[0343] In the air conditioner 70 , the second connecting line 71 may form an independent closed loop independent of the battery coolant line 21 through the operation of the fourth valve V4 .

[0344] Therefore, in the air conditioner 70 , the coolant circulates along the second connecting line 71 by the operation of the fourth water pump 72 , and the coolant of low temperature that has passed through the evaporator 56 may be supplied to the cooler 64 .

[0345] In the CE device 50 , each component operates to cool the interior of the vehicle. Therefore, refrigerant circulates along the refrigerant line 51 .

[0346] The heating device 40 supplies the coolant supplied from the cooling device 10 by the operation of the third water pump 42 to the condenser 53 .

[0347] Therefore, the condenser 53 condenses the refrigerant supplied from the compressor 59 using the coolant circulating along the first connecting line 41 .

[0348] In addition, the evaporator 56 exchanges heat with the refrigerant circulating along the second connecting line 71 and the low-temperature refrigerant evaporated inside the evaporator 56 by the operation of the fourth water pump 72 .

[0349] The fourth water pump 72 operates to supply the low-temperature refrigerant that has passed through the evaporator 56 to the cooler 64 along the second connecting line 71 .

[0350] Therefore, in the air conditioner 70 , the coolant circulates along the second connecting line 71 by the operation of the fourth water pump 72 , and the coolant of low temperature that has passed through the evaporator 56 may be supplied to the cooler 64 .

[0351] That is, the refrigerant circulating along the refrigerant line 51 in the CE device 50 is condensed by exchanging heat with the coolant passing through the condenser 53 .

[0352] Next, the refrigerant expands through the expansion valve 55 and evaporates in the evaporator 46 .

[0353] In this case, the refrigerant evaporated from the evaporator 56 cools the coolant introduced through the second connecting line 71. Therefore, the coolant passes through the evaporator 56 to be cooled at a low temperature, and the cooled coolant is supplied to the cooler 64 through the second connecting line 71.

[0354] Meanwhile, the refrigerant having passed through the evaporator 56 passes through the refrigerator 30 , the accumulator 57 , the compressor 59 , and the condenser 53 in sequence along the refrigerant line 51 .

[0355] The refrigerant supplied to the accumulator 57 is separated into gas and liquid. Of the refrigerant separated into gas and liquid, the gas refrigerant is supplied to the compressor 59.

[0356] The refrigerant compressed with high temperature and high pressure from the compressor 59 flows into the condenser 53 .

[0357] Therefore, the refrigerant supplied to the condenser 53 may increase the temperature of the refrigerant by exchanging heat with the refrigerant circulating through the first connecting line 41. The coolant having the increased temperature is supplied to the heater 62.

[0358] Herein, the outside air introduced into the HVAC module 60 exchanges heat with the low-temperature coolant introduced into the cooler 64 to be cooled.

[0359] At this time, the door 66 reduces a portion of the cooled outside air that has passed through the heater 62 and allows the cooled outside air to pass through the heater 62. Therefore, the cooled outside air can be dehumidified while passing through the heater 62 and then flow into the interior of the vehicle.

[0360] That is, the high temperature dehumidification mode of the vehicle cools the interior of the vehicle by using the coolant while repeatedly performing the above process, and at the same time supplies the coolant with an increased temperature to the heater 62 by heat exchange with the refrigerant in the condenser 53, thereby performing interior dehumidification together therewith.

[0361] Will refer to Figure 10 The operation in the case of heating the battery module 24 will be described.

[0362] Figure 10 An operating state diagram of a battery module in a heat pump system for heating a vehicle according to an exemplary embodiment of the present invention is shown.

[0363] Reference Figure 10 The heat pump system can heat the battery module 24 by recovering waste heat from the electrical components 15 .

[0364] In the cooling device 10 , the second branch line 35 is opened by the operation of the first valve V1 .

[0365] Simultaneously, by operation of the first valve V1, a portion of the coolant line 11 connected to the radiator 12 and a portion of the coolant line 11 connecting the radiator 12 and the reservoir tank 16 are closed based on the second branch line 35. Herein, the CE device 50 is stopped.

[0366] Therefore, in the cooling device 10 , the coolant having passed through the electric component 15 can circulate along the opened second branch line 35 and the coolant line 11 without passing through the radiator 12 by the operation of the first water pump 14 .

[0367] In the battery cooling device 20 , by operation of the second valve V2 , the portion of the first branch line 31 connected to the second branch line 35 is opened, and based on the first branch line 31 , the remaining portion of the battery coolant line 21 excluding the battery coolant line 21 connected to the reservoir tank 16 is opened.

[0368] Therefore, the battery coolant line 21 connected to the reservoir tank 16 through the first branch line 31 may be closed, and the remaining battery coolant lines 21 connected to the battery modules 24 may be opened.

[0369] That is, in the battery cooling apparatus 20 , the battery coolant line 21 connected to the second water pump 22 and the battery module 24 is opened to be connected to the first branch line 31 .

[0370] Therefore, in the battery cooling device 20 , the coolant circulates along the opened battery coolant line 21 and the first branch line 31 by the operation of the second water pump 22 .

[0371] The coolant passing through the battery module 24 may flow into the reservoir tank 16 connected via the second valve V2 .

[0372] Meanwhile, in the heating device 40 , the coolant line 11 and the first connecting line 41 are connected by the operation of the third valve V3 .

[0373] In this state, the coolant whose temperature is increased while passing through the electric components 15 by the operation of the first water pump 14 flows into the first connecting line 41 connected through the third valve V3 without passing through the radiator 12 .

[0374] That is, in the cooling apparatus 10 , the coolant having a temperature increased by the waste heat of the electric component 15 may be circulated through the first connecting line 41 by the operation of the third water pump V3 .

[0375] Here, when the temperature of the coolant circulating along the first connecting line 41 is lower than the target temperature, the coolant heater 43 operates to heat the coolant. Then, the coolant circulating in the first connecting line 41 increases in temperature as it passes through the coolant heater 43.

[0376] Therefore, the refrigerant whose temperature is increased when passing through the refrigerant heater 43 flows from the first connecting line 41 into the coolant line 11 via the third valve V3. Then, the high-temperature coolant is introduced from the coolant line 11 into the first branch line 31 through the second branch line 35.

[0377] The high-temperature coolant introduced into the first branch line 31 may be supplied to the battery modules 24 connected through the battery coolant line 21 and the first branch line 31 .

[0378] As a result, the high temperature coolant may raise the temperature of the battery module 24 .

[0379] As a result, according to the embodiment of the present invention, the temperature of the battery module 24 can be quickly increased while repeating the above-mentioned process, thereby effectively managing the temperature of the battery module 24.

[0380] On the other hand, in the present exemplary embodiment, the refrigerator 30 is described as an embodiment provided in the refrigerant line 51 between the evaporator 56 and the compressor 59 , but is not limited thereto.

[0381] That is, see Figure 11 A heat pump system for a vehicle according to another exemplary embodiment of the present invention is described.

[0382] Figure 11 A block diagram of a heat pump system for a vehicle according to another exemplary embodiment of the present invention is shown.

[0383] In a heat pump system for a vehicle according to another exemplary embodiment of the present invention, the cooling device 10, the battery cooling device 20, the refrigerator 30, the heating device 40, and the air conditioner 70 except for the concentrated energy device 50 are the same as those of the one embodiment of the present invention. Therefore, repeated descriptions are omitted.

[0384] Reference Figure 11 In a heat pump system according to another exemplary embodiment of the present invention, a concentrated energy device 50 includes a condenser 53 , a first expansion valve 151 , an evaporator 56 , and a compressor 59 .

[0385] First, the refrigerant circulates in the condenser 53 , and the condenser 53 is provided between the third valve V3 and the heater 62 .

[0386] The first expansion valve 151 may be connected to the condenser 53 through the refrigerant line 51. The first expansion valve 151 is expanded by receiving the refrigerant having passed through the condenser 53. The first expansion valve 151 may be formed of a mechanical type or an electronic type.

[0387] The evaporator 56 is connected to the first expansion valve 151 through the refrigerant line 51. The evaporator 56 is provided in the second connecting line 71 between the fourth valve V4 and the cooler 64 to cool the refrigerant circulating along the second connecting line 71 in the air conditioner 70.

[0388] The compressor 59 is provided in the refrigerant line 51 between the evaporator 46 and the condenser 53. The compressor 59 compresses the gaseous refrigerant discharged from the evaporator 56 and can supply the compressed refrigerant to the condenser 53.

[0389] The accumulator 57 is provided in the refrigerant line 51 between the evaporator 56 and the compressor 59 .

[0390] The accumulator 57 improves the efficiency and durability of the compressor 59 by supplying only the gaseous refrigerant to the compressor 59 .

[0391] Herein, the refrigerator 30 may be provided on the refrigerant connecting line 153 . A first end of the refrigerant connecting line 153 is connected to the refrigerant line 51 between the condenser 53 and the first expansion valve 151 , and a second end of the refrigerant connecting line 153 is connected to the accumulator 57 .

[0392] Therefore, the refrigerator 30 is connected in parallel with the refrigerant line 51 through the refrigerant connection line 153 .

[0393] In addition, the refrigerant connection line 153 may be provided with a second expansion valve 155 for expanding the refrigerant while selectively controlling the flow of the refrigerant into the refrigerator 30 .

[0394] When the battery module 24 is cooled using the refrigerant, the second expansion valve 155 may expand the refrigerant flowing through the refrigerant connection line 153 to be supplied to the refrigerator 30 .

[0395] Herein, the second expansion valve 155 may be operated even when waste heat of the electric component 15 or the battery module 24 is recovered in the heating mode of the vehicle.

[0396] The second expansion valve 155 may selectively expand the refrigerant flowing through the refrigerant connection line 153 to be supplied to the refrigerator 30 .

[0397] That is, while lowering the temperature of the refrigerant, the second expansion valve 155 expands the refrigerant discharged from the condenser 53 and flowing into the refrigerator 30 , thereby further lowering the temperature of the refrigerant.

[0398] As described above, by applying the heat pump system for a vehicle according to an exemplary embodiment of the present invention, the interior temperature of the vehicle can be controlled using a low-temperature or high-temperature heat-exchanged refrigerant by selectively allowing heat energy generated from the refrigerant to be heat-exchanged with the refrigerant when the refrigerant condenses and evaporates, and the system can be simplified and the arrangement of the connecting pipelines in which the coolant circulates can be simplified.

[0399] According to an embodiment of the present invention, by using one refrigerator 30 for exchanging heat between a coolant and a refrigerant, the temperature of the battery module 24 can be adjusted according to the mode of the vehicle, and the interior of the vehicle can be cooled and heated by using the coolant, thereby simplifying the entire system.

[0400] Furthermore, the embodiment of the present invention may use the coolant heater 43 applied to the heating device 40 to heat the battery module 24 or assist in interior heating of the vehicle, thereby reducing cost and weight.

[0401] Furthermore, embodiments of the present invention may improve vehicle heating efficiency using waste heat from electrical components 15 and battery module 24 and may increase the overall range of the vehicle through effective temperature control of battery module 24 to obtain optimal performance of the battery module.

[0402] Furthermore, the embodiment of the present invention can reduce size and weight by encapsulating the concentrated energy device 50 for generating thermal energy through condensation and evaporation of a coolant, and can prevent the generation of noise, vibration, and operational instability compared to an air conditioner using a high-performance refrigerant according to the related art.

[0403] Furthermore, by simplifying the entire system, production costs and weight can be reduced, and space utilization can be improved.

[0404] While the invention has been described in connection with what are presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims

1. A heat pump system for a vehicle, the system comprising: a cooling device comprising a radiator, a first water pump, a first valve, and a reservoir tank connected by a coolant line, the cooling device being configured to circulate a coolant in the coolant line to cool at least one electrical component disposed in the coolant line; a battery cooling device comprising a battery coolant line, a second water pump, and a battery module, wherein a first end of the battery coolant line is connected to the fluid reservoir and a second end is connected to a second valve, the battery coolant line is connected to the fluid reservoir via the second valve, and the second water pump and the battery module are connected via the battery coolant line, the battery cooling device being configured to circulate the coolant through the battery module; a refrigerator provided in a first branch line connected to the battery coolant line through the second valve, the refrigerator being configured to pass a refrigerant to adjust a temperature of the coolant by performing heat exchange between the coolant selectively introduced into a second branch line and the refrigerant, the second branch line connecting the coolant line and the first branch line through the first valve and the first branch line; a heating device comprising: a first connecting line connected to the coolant line through a third valve, and a third water pump and a heater, the first connecting line being connected to the coolant line, the third water pump and the heater being provided in the first connecting line, and the heating device being configured to heat the interior of the vehicle using the coolant; an air conditioner including a second connecting line connected to the battery coolant line through a fourth valve, and a fourth water pump and a cooler disposed in the second connecting line, and configured to cool the interior of the vehicle using the coolant; and a concentrated energy device connected to the first connecting line and the second connecting line and configured to supply the coolant at a low temperature to the air conditioner and the coolant at a high temperature to the heating device, and selectively perform heat exchange using the coolant for heat energy generated when condensing and evaporating the refrigerant circulating internally, wherein a first end of the second branch line is connected to the coolant line via the first valve, and a second end of the second branch line is connected to the first branch line between the second valve and the refrigerator. The battery module is configured to be fast charged in a cooling mode of the vehicle, and when fast charging the battery module: In the cooling device, the first water pump is configured to operate to circulate the coolant in the coolant line; the first valve being configured to operate to close the second branch line; In the battery cooling device, the second valve is configured to operate to open the first branch line, close a portion of the battery coolant line connected to the reservoir tank based on the first branch line, and the second water pump is configured to operate to supply the coolant that has passed through the refrigerator to the battery module along the battery coolant line and the first branch line; In the heating device, the third valve is configured to operate to connect the coolant line and the first connecting line so that the coolant is supplied from the cooling device, and the third water pump is configured to operate to circulate the coolant along the first connecting line; In the air conditioner, the fourth valve is configured to operate to connect the second connecting line to the battery coolant line, and the fourth water pump is configured to operate to supply the coolant from the battery cooling device and circulate the coolant along the second connecting line; and In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along a refrigerant line.

2. The system of claim 1, wherein: The heater and the cooler are disposed inside a HVAC module.

3. The system according to claim 2, wherein: The battery module is configured to be heated, and wherein, when the battery module is heated: the first valve being configured to operate to open the second branch line; In the cooling device, the coolant line connected to the radiator is closed based on the second branch line, and the first water pump is configured to operate so that the coolant that has passed through the electric component circulates along the opened second branch line and the coolant line without passing through the radiator; A portion of the first branch line is connected to the second branch line; closing the battery coolant line connected to the reservoir tank based on the first branch line; In the battery cooling device, in a state in which the second valve is configured to operate to connect the reservoir tank and the battery coolant line, the second water pump is configured to operate to circulate the coolant along the battery coolant line and a portion of the first branch line; In the heating device, the third valve is configured to operate to connect the coolant line and the first connecting line, and in the cooling device, the third water pump is configured to operate to circulate the coolant having a temperature increased by waste heat of the electric component to the first connecting line; and A high-temperature coolant is configured to flow from the first connecting line into the coolant line, flow from the coolant line into the first branch line through the second branch line, and be supplied to the battery module connected to the battery coolant line through the first branch line.

4. The system according to claim 2, wherein: The HVAC module includes an opening and closing door provided between the heater and the cooler and configured to control external air passing through the cooler to selectively flow into the heater according to a cooling mode, a heating mode, and a dehumidification mode of the vehicle.

5. The system of claim 4, wherein: The HVAC module further includes an air heater disposed on an opposite side of the cooler, the heater being interposed between the air heater and the cooler, and the air heater being configured to selectively heat the outside air passing through the heater; and The air heater is configured to operate to increase a temperature of the outside air passing through the heater when a temperature of the coolant supplied to the heater is lower than a target temperature for interior heating.

6. The system according to claim 2, wherein: The energy concentrating device comprises: a condenser configured to circulate the refrigerant therein, the condenser being provided in the first connecting line between the third valve and the heater, the condenser condensing the refrigerant and increasing the temperature of the coolant through heat exchange between the refrigerant and the coolant; an expansion valve connected to the condenser via a refrigerant line; an evaporator connected to the expansion valve through the refrigerant line, the evaporator being provided on the second connecting line between the fourth valve and the cooler, and the evaporator being configured to evaporate the refrigerant and reduce the temperature of the coolant through heat exchange between the refrigerant and the coolant; a compressor, disposed on the refrigerant pipeline between the evaporator and the condenser; as well as an accumulator, provided on the refrigerant line between the evaporator and the compressor, The refrigerator is provided on the refrigerant line between the evaporator and the accumulator.

7. The system according to claim 6, wherein: The condenser is configured to condense the refrigerant by exchanging heat with the coolant circulating in the first connecting line and the high-temperature refrigerant supplied from the compressor in a heating mode of the vehicle, and supply the high-temperature refrigerant to the heater through the first connecting line.

8. The system according to claim 6, wherein: The evaporator is configured to cool the refrigerant circulating through the second connecting line by exchanging heat with the low-temperature refrigerant evaporated in the evaporator in a cooling mode of the vehicle, and supply the low-temperature coolant to the cooler through the second connecting line.

9. The system according to claim 6, wherein: The battery module is configured to be cooled in a cooling mode of the vehicle, and wherein, when cooling the battery module: In the cooling device, the first water pump is configured to operate to circulate the coolant in the coolant line; the first valve being configured to operate to close the second branch line; In the battery cooling device, the second valve is configured to operate to open the first branch line; Based on the first branch line, a portion of the battery coolant line connected to the reservoir tank is closed, and the second water pump is configured to operate to supply the coolant that has passed through the refrigerator to the battery module along the battery coolant line and the first branch line; In the heating device, the third valve is configured to operate to connect the coolant line and the first connecting line so that the coolant is supplied from the cooling device; The third water pump is configured to operate to circulate the coolant along the first connecting line; In the air conditioner, the fourth valve is configured to operate to form an independent closed loop in the second connecting line independent of the battery coolant line; The fourth water pump is configured to operate to circulate the coolant along the second connecting line and supply the coolant having a low temperature that has passed through the evaporator to the cooler; and In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along the refrigerant line.

10. The system of claim 6, wherein: The refrigerant circulating the heating device is configured to be supplied to the condenser along the first connecting line so that the condenser condenses the refrigerant by exchanging heat with the coolant; and The coolant circulating the air conditioner is configured to be supplied to the evaporator along the second connecting line, so that the evaporator evaporates the refrigerant through heat exchange with the coolant.

11. The system according to claim 6, wherein: The heat pump system is configured to recover waste heat of the electric component in a heating mode of the vehicle, and wherein, when recovering waste heat of the electric component: the first valve being configured to operate to open the second branch line; In the cooling device, based on the second branch line, a portion of the coolant line connected to the radiator and a portion of the coolant line connected to the radiator and the reservoir tank are closed; opening a portion of the first branch line connected to the second branch line, and closing a remaining portion of the battery coolant line except for the battery coolant line connected to the reservoir tank based on the first branch line; The battery cooling device is configured to stop; the third valve being configured to operate to form an independent closed circuit in the coolant line and the first connecting line; the first water pump being configured to operate to supply the coolant, the temperature of which is increased when passing through the electric component, to the refrigerator along the second branch line and a portion of the opened first branch line without passing through the radiator; The coolant discharged from the refrigerator is configured to flow into the reservoir tank through the first branch line and the opened battery coolant line; In the heating device, the third water pump is configured to operate to circulate the coolant along the first connecting line; In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along the refrigerant line; and The air conditioner is configured to stop.

12. The system according to claim 6, wherein: The heat pump system is configured to recover waste heat of the battery module in a heating mode of the vehicle, wherein when recovering the waste heat of the battery module: The first valve is configured to operate to close the second branch line, and the cooling device is configured to stop; In the battery cooling device, the second valve is configured to operate to connect the reservoir tank and the battery coolant line, and the first branch line is configured to be open; closing a portion of the battery coolant line connecting the liquid storage tank and the refrigerator based on the first branch line; the second water pump being configured to operate to supply the coolant passing through the battery module to the refrigerator along the opened first branch line and the battery coolant line; In the heating device, the third water pump is configured to circulate the coolant along the first connecting line; In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along the refrigerant line; and The air conditioner is configured to stop.

13. The system according to claim 6, wherein: In low temperature dehumidification mode of the vehicle: the first valve being configured to operate to open the second branch line; In the cooling device, based on the second branch line, a portion of the coolant line connected to the radiator and a portion of the coolant line connected to the radiator and the reservoir tank are closed; the second valve being configured to operate to open a portion of the first branch line connected to the second branch line and to close a remaining portion of the battery coolant line except for the battery coolant line connected to the reservoir tank based on the first branch line; The battery cooling device is configured to stop; the third valve being configured to operate to form an independent circuit in the coolant line and the first connecting line; the first water pump being configured to operate to supply the coolant, the temperature of which is increased when passing through the electric component, to the refrigerator along the second branch line and a portion of the opened first branch line without passing through the radiator; The coolant is configured to be discharged from the refrigerator and flow into the storage tank through the first branch line and the opened battery coolant line; In the heating device, the third water pump is configured to operate to circulate the coolant along the first connecting line; In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along the refrigerant line; and In the air conditioner, the fourth water pump is configured to operate to circulate the coolant along the second connecting line.

14. The system according to claim 6, wherein: In the high temperature dehumidification mode of the vehicle: the first valve being configured to operate to close the second branch line; In the cooling device, the first water pump is configured to circulate the coolant in the coolant line; the second valve is configured to operate to close the battery coolant line and the first branch line, and the battery cooling device is configured to be stopped; In the heating device, the third valve is configured to operate to connect the coolant line and the first connecting line so that the coolant is supplied from the cooling device, and the third water pump is configured to operate to circulate the coolant along the first connecting line; In the concentrated energy device, each constituent element is configured to operate so that the refrigerant circulates along the refrigerant line; and In the air conditioner, the fourth water pump is configured to circulate the coolant along the second connecting line.

15. The system of claim 1, wherein: The electrical components and the battery modules are configured to be cooled using the coolant, and wherein, when cooling the electrical components and the battery modules: the first valve being configured to operate to close the second branch line; the second valve being configured to operate to close the first branch line; the first water pump being configured to operate to supply the coolant cooled in the radiator and stored in the reservoir tank to the electric components; and The second valve is configured to operate to supply the coolant stored in the reservoir tank to the battery module while circulating through the battery coolant line connected to the coolant line.

16. The system of claim 1, wherein: The system is configured to use waste heat from the electrical components in a heating mode of the vehicle without operating the concentrated energy device, and wherein when using waste heat from the electrical components: the first valve being configured to operate to open the second branch line; In the cooling device, based on the second branch line, a portion of the coolant line connected to the radiator and a portion of the coolant line connected to the radiator and the reservoir tank are closed; opening a portion of the first branch line connected to the second branch line, and closing a remaining portion of the battery coolant line except for the battery coolant line connected to the reservoir tank based on the first branch line; The battery cooling device is configured to stop; the first water pump being configured to operate to supply the coolant, the temperature of which is increased when passing through the electric component, to the heater along the first connecting line connected through the third valve; The coolant discharged from the heater is configured to be supplied to the refrigerator along the first connecting line, the third valve, the coolant line, the second branch line, and a portion of the first branch line without passing through the radiator; and The coolant discharged from the refrigerator is configured to flow into the reservoir tank through the first branch line and the opened battery coolant line.

17. The system of claim 4, wherein: The heating device further includes a coolant heater provided on the first connecting line between the third water pump and the heater; and In the heating mode, or in the low-temperature dehumidification mode, the coolant heater is configured to operate when the temperature of the coolant supplied to the heater is lower than a target temperature or when the battery module is heated.

18. The system of claim 1, wherein: The energy concentrating device comprises: a condenser provided in the first connecting line between the third valve and the heater, the condenser being configured to circulate the refrigerant therein, the condenser condensing the refrigerant and increasing the temperature of the coolant through heat exchange between the refrigerant and the coolant; a first expansion valve connected to the condenser via a refrigerant line; an evaporator connected to the first expansion valve through the refrigerant line, the evaporator being provided on the second connecting line between the fourth valve and the cooler and configured to evaporate the refrigerant and reduce the temperature of the coolant through heat exchange between the refrigerant and the coolant; a compressor, disposed on the refrigerant pipeline between the evaporator and the condenser; as well as an accumulator, provided on the refrigerant line between the evaporator and the compressor, The refrigerator is provided on the refrigerant connecting line, a first end of the refrigerant connecting line is connected to the refrigerant line between the condenser and the first expansion valve, and a second end of the refrigerant connecting line is connected to the accumulator.

19. The system of claim 18, wherein: The refrigerator is connected in parallel with the refrigerant pipeline via the refrigerant connecting pipeline; and A second expansion valve is provided on the refrigerant connection line, and the second expansion valve is configured to selectively control the refrigerant flowing to the refrigerator while expanding.

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