Heat pump system for vehicle

Abstract

A heat pump system of a vehicle includes a compressor, an HVAC module, a heat exchanger, a first expansion valve, a first connection line, a chiller, a second expansion valve, a gas injection device, a second connection line, a third connection line, and a fourth connection line. The heat pump system increases a flow rate of a refrigerant by applying a gas injection device selectively operating in an air conditioning mode inside a vehicle, thereby improving cooling and heating performance.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and interest in Korean Patent Application No. 10-2024-0128972, filed on September 24, 2024, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to a heat pump system for a vehicle. More specifically, this invention relates to a heat pump system for a vehicle that can improve cooling and heating performance by applying a gas injection device configured to operate selectively in a selected air conditioning mode. Background Technology

[0004] The vehicle's air conditioning system includes an air conditioning unit that circulates refrigerant to heat or cool the vehicle's interior.

[0005] Regardless of changes in the outside temperature, the air conditioning unit maintains the vehicle interior at an appropriate temperature to ensure a comfortable environment. The air conditioning unit is configured to heat or cool the vehicle interior, which is achieved by utilizing heat exchange in the condenser and evaporator as the refrigerant discharged from the compressor circulates back to the compressor through the condenser, receiver dryer, expansion valve, and evaporator.

[0006] In other words, in summer, in cooling mode, the air conditioning unit condenses the high-temperature, high-pressure gaseous refrigerant compressed from the compressor through the condenser, allowing the refrigerant to pass through the receiver dryer and expansion valve, and then evaporate in the evaporator, thereby reducing the temperature and humidity inside the vehicle.

[0007] With increasing concern about energy efficiency and environmental pollution, there is a need to develop environmentally friendly vehicles that can largely replace internal combustion engine vehicles. These environmentally friendly vehicles are divided into electric vehicles and hybrid electric vehicles. Electric vehicles use fuel cells or electricity as a power source, while hybrid electric vehicles use an engine and batteries for propulsion.

[0008] Unlike conventional vehicles, these eco-friendly electric or hybrid electric vehicles do not use separate heaters, and the air conditioning systems used in eco-friendly vehicles are typically called heat pump systems.

[0009] Electric vehicles powered by fuel cells generate propulsion by converting the energy from the chemical reaction between oxygen and hydrogen into electrical energy. During this process, heat is generated through the chemical reactions within the fuel cell. Therefore, it is necessary to effectively remove the generated heat to ensure the performance of the fuel cell.

[0010] Furthermore, hybrid electric vehicles generate propulsion through a drive motor (which uses electricity supplied from the aforementioned fuel cell or battery) and an engine (which runs on conventional fuels such as gasoline). Therefore, to ensure the performance of the motor, the heat generated from the fuel cell or battery and the motor should be effectively removed.

[0011] Therefore, according to relevant technologies, in hybrid electric vehicles or electric vehicles, the cooling device, heat pump system and battery cooling system should be configured as separate closed loops to prevent the motor, electrical components and batteries including fuel cells from overheating.

[0012] Therefore, the size and weight of the cooling module located at the front of the vehicle increase, and the layout of the connecting pipelines supplying refrigerant and coolant to each of the heat pump system, cooling device and battery cooling system in the engine compartment becomes more complicated.

[0013] In addition, because a separate battery cooling system is used to heat or cool the battery according to the vehicle's condition to achieve optimal battery performance, multiple valves are used to selectively connect the connecting lines. Therefore, noise and vibration caused by the frequent opening and closing of the valves may be introduced into the vehicle interior, thereby reducing the vehicle's ride comfort.

[0014] Additionally, heating performance may be compromised due to a lack of heat source when heating the vehicle interior. Power consumption may increase due to the use of electric heaters, and the power consumption of the compressor may also increase.

[0015] The information disclosed in this background section is only intended to enhance the understanding of the background technology of the present invention, and therefore may contain information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0016] The present invention provides a heat pump system for a vehicle that can increase the flow of refrigerant by using a gas injection device that operates selectively in the air conditioning mode inside the vehicle, thereby improving cooling and heating performance.

[0017] The vehicle's heat pump system includes a compressor configured to compress refrigerant. The heat pump system further includes a heating, ventilation, and air conditioning (HVAC) module, which includes an internal condenser and evaporator, and an open / close door connected to the compressor via refrigerant lines. The open / close door is configured to selectively introduce air already passing through the evaporator into the internal condenser based on cooling or heating of the vehicle interior. The heat pump system further includes a heat exchanger connected to the internal condenser via a refrigerant line and configured to condense or evaporate the supplied refrigerant by heat exchange with air. The heat pump system further includes a first expansion valve and a first connecting line. The first expansion valve is disposed on the refrigerant line between the heat exchanger and the evaporator; that is, the first expansion valve is connected to the refrigerant line between the heat exchanger and the evaporator or the first expansion valve runs along the refrigerant line between the heat exchanger and the evaporator. A first end of the first connecting line is connected to the refrigerant line between the evaporator and the compressor, and a second end of the first connecting line is connected to the refrigerant line between the heat exchanger and the first expansion valve. The heat pump system further includes a quencher disposed on a first connecting line and configured to allow refrigerant introduced through the first connecting line to exchange heat with selectively introduced coolant to regulate the temperature of the coolant. The heat pump system further includes a second expansion valve disposed on the first connecting line upstream of the quencher. The heat pump system further includes a gas injection device connected to a refrigerant line between an internal condenser and a heat exchanger, configured to selectively expand refrigerant supplied from the internal condenser or to expand refrigerant supplied to the heat exchanger and allow the expanded refrigerant to flow, and selectively supply a portion of the supplied refrigerant to the compressor to increase the flow rate of refrigerant circulating through the refrigerant line. The heat pump system further includes a second connecting line, a first end of which is connected to the refrigerant line between the heat exchanger and the first expansion valve, and a second end of which is connected to the gas injection device. The heat pump system further includes a third connecting line, the first end of which is connected to a second expansion valve, and the second end of which is connected to a refrigerant line between the evaporator and the compressor. The heat pump system further includes a fourth connecting line, the first end of which is connected to a refrigerant line between the heat exchanger and the first end of the second connecting line, and the second end of which is connected to a gas injection device.

[0018] The gas injection device may include a flash tank configured to separate introduced refrigerant into gaseous and liquid refrigerant, and selectively discharge the separated refrigerant. The gas injection device may include a first line, a first end of which is connected to a refrigerant line between an internal condenser and a heat exchanger, and a second end of which is connected to the flash tank. The gas injection device may include a third expansion valve and a second line, the third expansion valve being disposed on the first line; the second line connects the compressor and the flash tank and is configured to selectively supply gaseous refrigerant from the flash tank to the compressor. The gas injection device may include a third line, the first end of which is connected to the flash tank. The gas injection device may include a fourth expansion valve, the fourth expansion valve being connected to a second end of the third line and a second connecting line, and configured to selectively expand the refrigerant discharged from the flash tank to the third line.

[0019] The fourth expansion valve can be configured to: selectively expand the refrigerant supplied from the flash tank and supply the expanded refrigerant to the heat exchanger; or supply the refrigerant supplied from the flash tank to the first expansion valve, the second expansion valve, or a combination of the first expansion valve and the second expansion valve without expanding it.

[0020] The third and fourth expansion valves can be configured to operate selectively in a cooling mode, a heating mode, or a heating and dehumidification mode inside the vehicle, and selectively expand the refrigerant while controlling the flow direction of the supplied refrigerant.

[0021] The flash tank can operate while the expanded refrigerant is supplied from the third expansion valve via the first line, and the gaseous refrigerant in the supplied refrigerant is supplied to the compressor via the second line to increase the flow rate of the refrigerant circulating through the refrigerant line.

[0022] The second end of the fourth connecting line can be connected to the third expansion valve.

[0023] The heat pump system may further include a fifth connecting line, the first end of which is connected to a fourth expansion valve, and the second end of which is connected to a refrigerant line upstream of the heat exchanger. The heat pump system may further include a first valve and a second valve, the first valve being disposed on the refrigerant line between the internal condenser and the heat exchanger; the second valve being disposed on the refrigerant line between the first end of the second connecting line and the first end of the fourth connecting line.

[0024] When the gas injection device is operating in the vehicle's internal cooling mode and the battery module needs cooling, a portion of the refrigerant line connecting the internal condenser and heat exchanger can be connected via the first valve. A portion of the refrigerant line connecting the first end of the fourth connecting line to the first end of the second connecting line can be closed via the second valve. A portion of the first line connecting the refrigerant line to the third expansion valve can be closed. The remaining portion of the first line connecting the third expansion valve to the flash tank can be connected. The second line can be connected, and the third line can be connected via the fourth expansion valve. The first connecting line can be connected via the second expansion valve, and the second connecting line can be connected via the fourth expansion valve. The third connecting line can be closed via the second expansion valve. The fourth connecting line can be connected via the third expansion valve. The fifth connecting line can be closed via the fourth expansion valve. The first expansion valve allows the refrigerant introduced from the flash tank through the second connecting line and a portion of the refrigerant line to expand, and the expanded refrigerant can be supplied to the evaporator. The second expansion valve allows the refrigerant introduced through the second connecting line, a portion of the refrigerant line, and the first connecting line to expand, and the expanded refrigerant can be supplied to the quencher. The third expansion valve allows the refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the fourth connecting line to expand, and can supply the expanded refrigerant to the first line. The fourth expansion valve allows the refrigerant supplied from the flash tank through the third line to flow into the second connecting line without expanding. The flash tank can supply gaseous refrigerant from the refrigerant introduced into it to the compressor through the connected second line.

[0025] When the gas injection device operates in the vehicle's interior heating mode and recovers waste heat from electrical components, a portion of the refrigerant line connecting the first end of the first pipeline to the heat exchanger can be closed via the first valve. A portion of the refrigerant line connecting the first end of the first connecting pipeline to the compressor can be connected. A portion of the refrigerant line connecting the second end of the first connecting pipeline to the evaporator can be closed via the first expansion valve. A portion of the refrigerant line connecting the evaporator to the first end of the first connecting pipeline can be closed. A portion of the refrigerant line connecting the heat exchanger to the first end of the second connecting pipeline can be closed via the second valve. The first pipeline can be connected via the third expansion valve. The second pipeline can be connected. The third pipeline can be connected via the fourth expansion valve. The first connecting pipeline can be connected via the second expansion valve. The second connecting pipeline can be connected via the fourth expansion valve. The third connecting pipeline can be closed via the second expansion valve. The fifth connecting pipeline can be closed via the fourth expansion valve. The operation of the first expansion valve can be stopped. The second expansion valve allows the refrigerant introduced from the flash tank through the second connecting line, a portion of the refrigerant line, and the first connecting line to expand, and can supply the expanded refrigerant to the quench unit. The third expansion valve allows the refrigerant supplied from the internal condenser to expand, and can supply the expanded refrigerant to the flash tank through the first line. The fourth expansion valve allows the refrigerant supplied from the flash tank through the third line to flow into the second connecting line without expanding. The flash tank can supply gaseous refrigerant from the refrigerant introduced into its interior to the compressor through the connected second line.

[0026] When the gas injection device operates in the vehicle's interior heating mode and recovers heat from the ambient air, a portion of the refrigerant line connecting the first end of the first pipeline to the second end of the fifth connecting pipeline can be closed via the first valve. A portion of the refrigerant line connecting the heat exchanger to the second end of the first connecting pipeline can be opened via the second valve. A portion of the refrigerant line connecting the second end of the first connecting pipeline to the evaporator can be closed via the first expansion valve. A portion of the refrigerant line connecting the evaporator to the second end of the third connecting pipeline can be closed. A portion of the refrigerant line connecting the second end of the third connecting pipeline to the compressor can be opened. The first pipeline can be opened via the third expansion valve, the second pipeline can be opened, and the third pipeline can be opened via the fourth expansion valve. A portion of the first connecting pipeline connecting the refrigerant line to the second expansion valve can be opened via the second expansion valve. The remaining portion of the first connecting pipeline connecting the refrigerant line to the compressor to the quencher can be closed via the second expansion valve. The second connecting line can be closed via the fourth expansion valve, the third connecting line can be connected via the second expansion valve, the fourth connecting line can be closed via the third expansion valve, and the fifth connecting line can be connected via the fourth expansion valve. The operation of the first expansion valve can be stopped. The second expansion valve allows refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the first connecting line to flow into the third connecting line without expanding. The third expansion valve allows the refrigerant supplied from the internal condenser to expand, and the expanded refrigerant can be supplied to the flash tank via the first line. The fourth expansion valve allows the refrigerant supplied from the flash tank via the third line to expand, and the expanded refrigerant can flow into the fifth connecting line. The flash tank can supply gaseous refrigerant from the internal refrigerant to the compressor via the connected second line.

[0027] When the gas injection device operates in the vehicle's interior heating mode and recovers waste heat from electrical components and ambient air heat, a portion of the refrigerant line connecting the first end of the first pipeline to the second end of the fifth connecting pipeline can be closed via the first valve. A portion of the refrigerant line connecting the heat exchanger to the second end of the first connecting pipeline can be opened via the second valve. A portion of the refrigerant line connecting the second end of the first connecting pipeline to the evaporator can be closed via the first expansion valve. A portion of the refrigerant line connecting the evaporator to the first end of the first connecting pipeline can be closed. A portion of the refrigerant line connecting the first end of the first connecting pipeline to the compressor can be opened. The first pipeline can be opened via the third expansion valve, the second pipeline can be opened via the third expansion valve, the first connecting pipeline can be opened via the second expansion valve, the second connecting pipeline can be closed via the fourth expansion valve, the third connecting pipeline can be closed via the second expansion valve, the fourth connecting pipeline can be closed via the second expansion valve, and the fifth connecting pipeline can be opened via the fourth expansion valve. The operation of the first expansion valve can be stopped. The second expansion valve supplies refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the first connecting line to the quench without causing it to expand. The third expansion valve allows the refrigerant supplied from the internal condenser to expand, and the expanded refrigerant can be supplied to the flash tank through the first line. The fourth expansion valve allows the refrigerant supplied from the flash tank through the third line to expand, and the expanded refrigerant can flow into the fifth connecting line. The flash tank can supply gaseous refrigerant from the refrigerant introduced into it to the compressor through the connected second line.

[0028] When the gas injection device is running in the vehicle's interior heating and dehumidification mode, a portion of the refrigerant line connecting the evaporator and compressor can be connected. A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator can be connected via the first expansion valve. A portion of the refrigerant line connecting the first end of the first line to the heat exchanger can be closed via the first valve. A portion of the refrigerant line connecting the heat exchanger to the first end of the second connecting line can be closed via the second valve. The first line can be connected via the third expansion valve, the second line can be connected, and the third line can be connected via the fourth expansion valve. The first connecting line can be connected via the second expansion valve, the second connecting line can be connected via the fourth expansion valve, the third connecting line can be closed via the second expansion valve, the fourth connecting line can be closed via the third expansion valve, and the fifth connecting line can be closed via the fourth expansion valve. The first expansion valve expands the refrigerant introduced from the flash tank through the second connecting line and a portion of the refrigerant line, and supplies the expanded refrigerant to the evaporator. The second expansion valve expands the refrigerant introduced through the first connecting line, and supplies the expanded refrigerant to the quencher. The third expansion valve allows the refrigerant supplied from the internal condenser to expand, and the expanded refrigerant can be supplied to the flash tank through the first line. The fourth expansion valve allows the refrigerant supplied from the flash tank through the third line to flow into the second connecting line without expanding. The flash tank can supply gaseous refrigerant from the internal refrigerant to the compressor through the connected second line.

[0029] When the gas injection device is not running in the vehicle's interior heating and dehumidification mode, a portion of the refrigerant line connecting the evaporator and compressor can be connected. A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator can be connected via the first expansion valve. A portion of the refrigerant line connecting the first end of the first line to the heat exchanger can be closed via the first valve. A portion of the refrigerant line connecting the heat exchanger to the first end of the fourth connecting line can be closed. A portion of the refrigerant line connecting the first end of the fourth connecting line to the first expansion valve can be connected via the second valve. A portion of the first line can be connected via the third expansion valve, allowing the internal condenser to connect to the third expansion valve. The remaining portion of the first line connecting the flash tank to the third expansion valve can be closed via the third expansion valve. The second line can be closed, the third line can be closed via the fourth expansion valve, the first connecting line can be connected via the second expansion valve, and the second connecting line can be closed via the fourth expansion valve. The third connecting line can be closed via the second expansion valve, the fourth connecting line can be connected via the third expansion valve, and the fifth connecting line can be closed via the fourth expansion valve. The first expansion valve allows refrigerant introduced from the internal condenser through a portion of the first line, the fourth connecting line, and a portion of the refrigerant line to expand, and can supply the expanded refrigerant to the evaporator. The second expansion valve allows refrigerant introduced through the first connecting line to expand, and can supply the expanded refrigerant to the quencher. The third expansion valve allows refrigerant supplied from the internal condenser to flow into the fourth connecting line without expanding. The operation of the flash tank and the fourth expansion valve can be stopped.

[0030] When the gas injection device is in operation, the fifth connecting line can be connected through the fourth expansion valve when recovering ambient air heat in the vehicle interior heating mode, or when recovering waste heat from electrical components and ambient air heat together in the vehicle interior heating mode.

[0031] The second, third, and fourth expansion valves can be three-way electronic expansion valves configured to selectively expand the refrigerant while controlling the flow direction of the refrigerant.

[0032] When the gas injection device is running in the vehicle's cooling mode, or when the gas injection device is not running in the vehicle's heating and dehumidification mode, the fourth connecting line can be connected by operating the third expansion valve.

[0033] The heat pump system may further include an auxiliary heat exchanger connected to a second connecting line and a refrigerant line connecting the evaporator and the compressor, and configured to allow heat exchange between refrigerant supplied through the second connecting line and refrigerant supplied from the evaporator or quencher.

[0034] When recovering ambient air heat in the vehicle's interior heating mode, the third connecting line can be selectively connected via the second expansion valve.

[0035] The heat pump system may further include a cooling device comprising electrical components and a battery module through which coolant circulates, wherein a quencher is connected to the electrical components via a first coolant line through which coolant circulates, and to the battery module via a second coolant line through which coolant circulates.

[0036] When recovering waste heat from electrical components in the vehicle's heating mode, a first coolant line can be connected to connect the quencher and the electrical components; when cooling the battery module in the vehicle's cooling mode, or when recovering waste heat from the battery module in the vehicle's heating mode, a second coolant line can be connected to connect the quencher and the battery module.

[0037] As described above, the heat pump system of the vehicle according to an embodiment of the present invention can improve cooling and heating performance by increasing the flow rate of refrigerant through the application of a gas injection device (which operates selectively in the air conditioning mode inside the vehicle).

[0038] Furthermore, according to the present invention, by using a gas injection device, the performance of the system can be maximized while minimizing the required system components, thereby achieving system simplification and reduction.

[0039] Furthermore, according to the present invention, by streamlining the entire system, manufacturing costs and weight can be reduced, and space utilization of the vehicle or vehicle system can be improved. Attached Figure Description

[0040] Figure 1 This is a block diagram illustrating a heat pump system for a vehicle according to an embodiment of the present invention.

[0041] Figure 2 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in which the gas injection device is operated and the battery module is cooled in the cooling mode inside the vehicle.

[0042] Figure 3 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in which the gas injection device is operated and waste heat from electrical components is recovered in the heating mode inside the vehicle.

[0043] Figure 4 This is an operational diagram of the vehicle heat pump system according to an embodiment of the present invention, in which the gas injection device is operated and ambient air heat is recovered during the vehicle's interior heating mode.

[0044] Figure 5This is an operational diagram of the vehicle heat pump system according to an embodiment of the present invention, in a vehicle interior heating mode, when the gas injection device is operated and waste heat from electrical components and ambient air heat is recovered.

[0045] Figure 6 This is an operational diagram of the gas injection device operating in the heating and dehumidification mode inside the vehicle according to an embodiment of the present invention.

[0046] Figure 7 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in the heating and dehumidification mode inside the vehicle without the gas injection device operating.

[0047] Explanation of reference numerals in the attached figures:

[0048] 2: First coolant line

[0049] 3: Electrical components

[0050] 4: Second coolant line

[0051] 5: Battery Module

[0052] 10: Compressor

[0053] 11: Refrigerant Piping

[0054] 12: HVAC Module

[0055] 13: Internal condenser

[0056] 14: Open / close the door

[0057] 15: Heat exchanger

[0058] 16: First expansion valve

[0059] 17: Evaporator

[0060] 18: Liquid reservoir

[0061] 20: Quencher

[0062] 21: First connecting pipeline

[0063] 23: Second expansion valve

[0064] 30: Gas injection device

[0065] 31: Flash evaporator

[0066] 32: First pipeline

[0067] 33: Third expansion valve

[0068] 34: Second pipeline

[0069] 35: Third pipeline

[0070] 36: Fourth expansion valve

[0071] 41: Second connecting pipeline

[0072] 42: Third connecting pipeline

[0073] 43: Fourth connecting pipeline

[0074] 44: Fifth connecting pipeline

[0075] 51: First valve

[0076] 52: Second valve

[0077] 60: Secondary heat exchanger. Detailed Implementation

[0078] In the following, some embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0079] The embodiments disclosed in this specification and the structures depicted in the accompanying drawings are merely exemplary embodiments of the present invention and do not cover the full scope of the invention. Therefore, it should be understood that various equivalents and modifications to the disclosed embodiments may exist when applying the technical concepts of this specification.

[0080] To make the invention clear, parts unrelated to the description may be omitted. Furthermore, throughout the specification, the same elements or equivalents are indicated by the same reference numerals.

[0081] Furthermore, the dimensions and thickness of each element can be arbitrarily shown in the accompanying drawings, and the invention is not necessarily limited thereto. In the drawings, the thickness of layers, films, plates, regions, etc., may be exaggerated for clarity.

[0082] In addition, unless explicitly stated otherwise, the words “including,” “having,” “comprising,” and their variations (e.g., “including” or “including”) should be understood as implying the inclusion of the stated element, but not excluding any other element.

[0083] Furthermore, each of the terms described in the specification (e.g., "...unit", "...device", "...part", "...component", and "...building element") represents a unit of a comprehensive element that performs at least one function or operation. When the components, devices, units, modules, controllers, detectors, elements, etc., of the present invention are described as having a purpose or performing an operation, function, etc., the components, devices, units, modules, controllers, detectors, or elements shall be considered herein as "configured" to satisfy that purpose or perform that operation or function. The present invention describes a controller and data detector for a cooling system. The controller, detector, or other such component may be implemented separately or may include a processor and memory, such as a non-transitory computer-readable medium, as part of the controller or component.

[0084] Figure 1 This is a block diagram illustrating a heat pump system for a vehicle according to an embodiment of the present invention.

[0085] According to an embodiment of the present invention, the heat pump system of a vehicle can improve cooling and heating performance by increasing the flow rate of refrigerant through the application of a gas injection device 30, which operates selectively in the vehicle's interior air conditioning mode selected from cooling mode, heating mode, or heating and dehumidification mode.

[0086] According to the heat pump system, in electric vehicles, the air conditioning unit (which is an air conditioning device used to cool and heat the interior of the vehicle) and the cooling device through which the coolant circulates can be interconnected.

[0087] In other words, reference Figure 1 The heat pump system may include a cooling device and an air conditioning unit, the air conditioning unit including: a compressor 10, a heating, ventilation and air conditioning (HVAC) module 12, an internal condenser 13, a heat exchanger 15, a first expansion valve 16, an evaporator 17, a chiller 20, a first connecting line 21, a second expansion valve 23, a gas injection device 30, a second connecting line 41, a third connecting line 42, and a fourth connecting line 43.

[0088] The cooling device may include an electrical component 3 through which coolant circulates and a battery module 5.

[0089] The cooling system may further include a radiator (not shown). The radiator may be located at the upstream end, i.e., the front of the vehicle (relative to the normal driving or moving direction). A cooling fan (not shown) may be located behind the radiator. Accordingly, the radiator cools the coolant through the operation of the cooling fan and heat exchange with the ambient air.

[0090] Electrical component 3 can be connected to cooler 20 via a first coolant line 2 through which coolant circulates. Battery module 5 can be connected to cooler 20 via a second coolant line 4 through which coolant circulates.

[0091] In other words, electrical component 3 can be connected to the first coolant line 2 and cooled by water cooling.

[0092] Additionally, when recovering waste heat from electrical components 3 in the vehicle's interior heating mode, the first coolant line 2 can be connected to link the quencher 20 and electrical components 3.

[0093] Accordingly, the quencher 20 can regulate the temperature of the electrical component 3 by using a coolant that exchanges heat with the refrigerant, and can recover the waste heat of the electrical component 3.

[0094] When the battery module 5 is being cooled in the vehicle's cooling mode, or when the waste heat of the battery module 5 is being recovered in the vehicle's interior heating mode, the second coolant line 4 can be connected to connect the quencher 20 and the battery module 5.

[0095] The coolant can be selectively circulated through the first coolant line 2 and the second coolant line 4 by a water pump (not shown) to allow the coolant to flow through the coolant lines.

[0096] Electrical component 3 may include: power control unit (EPCU), motor, inverter, on-board charger (OBC) or autonomous driving controller, etc.

[0097] The power control device, inverter, motor, or automatic driving controller can generate heat during vehicle operation, and the charger can generate heat when charging battery module 5.

[0098] In other words, when recovering waste heat from electrical component 3 in the vehicle's heating mode, heat generated by the power control unit, motor, inverter, charger, or autonomous driving controller can be recovered.

[0099] In an embodiment of the invention, compressor 10 can compress the supplied refrigerant and allow the compressed refrigerant to flow into refrigerant line 11, so that the refrigerant can circulate along refrigerant line 11.

[0100] The internal condenser 13 and evaporator 17 of the compressor 10, connected via refrigerant line 11, can be located inside the HVAC module 12.

[0101] Inside the HVAC module 12, between the evaporator 17 and the internal condenser 13, there may be an open / close door 14 configured to regulate the ambient air that has passed through the evaporator 17 to selectively introduce ambient air into the internal condenser 13.

[0102] When the vehicle interior is heated, the open / close door 14 can be opened, allowing ambient air that has passed through the evaporator 17 to be introduced into the internal condenser 13.

[0103] In other words, the high-temperature refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air passing through the internal condenser 13. In other words, the introduced ambient air is converted to a high-temperature state as it passes through the internal condenser 13, and then introduced into the vehicle interior, thereby achieving vehicle interior heating.

[0104] Conversely, when cooling the vehicle interior, the open / close door 14 can close the side facing the interior condenser 13, allowing ambient air cooled by passing through the evaporator 17 to be directly introduced into the vehicle interior.

[0105] Accordingly, the ambient air passing through the evaporator 17 can be cooled by the low-temperature refrigerant supplied to the evaporator 17 as it passes through the evaporator 17. The cooled ambient air can be introduced into the vehicle interior, thereby cooling the vehicle interior.

[0106] In an embodiment of the invention, the heat exchanger 15 can be connected to the internal condenser 13 via a refrigerant line 11. The heat exchanger 15 can be located at the front of the vehicle.

[0107] Accordingly, the heat exchanger 15 can condense or evaporate the refrigerant by exchanging heat between the introduced refrigerant and the ambient air introduced during vehicle operation. In other words, the heat exchanger 15 can be an air-cooled heat exchanger configured to exchange heat between the introduced refrigerant and the ambient air.

[0108] The first expansion valve 16 can be disposed on the refrigerant line 11 connecting the heat exchanger 15 and the evaporator 17. That is, the first expansion valve 16 can be connected to the refrigerant line 11 connecting the heat exchanger 15 and the evaporator 17, or the first expansion valve 16 can be disposed along the refrigerant line 11 connecting the heat exchanger 15 and the evaporator 17. The first expansion valve 16 can selectively expand the introduced refrigerant.

[0109] The air conditioning unit may further include a receiver 18. The receiver 18 may be located on the refrigerant line 11 between the evaporator 17 and the compressor 10.

[0110] The receiver 18 can supply only gaseous refrigerant to the compressor 10, thereby improving the efficiency and durability of the compressor 10.

[0111] In an embodiment of the invention, the quencher 20 can cause heat exchange between the refrigerant supplied from the air conditioning unit and the coolant, thereby regulating the temperature of the coolant selectively supplied through the first coolant line 2 or the second coolant line 4.

[0112] In other words, the quencher 20 can be a water-cooled heat exchanger configured to allow the refrigerant introduced into the interior to exchange heat with the coolant.

[0113] The quencher 20 can be connected to the refrigerant line 11 via the first connecting line 21.

[0114] The first end of the first connecting line 21 can be connected to the refrigerant line 11 between the evaporator 17 and the receiver 18. Additionally, the second end of the first connecting line 21 can be connected to the refrigerant line 11 between the heat exchanger 15 and the first expansion valve 16.

[0115] The cooler 20 can regulate the temperature of the coolant by exchanging heat between the coolant selectively introduced via the first coolant line 2 or the second coolant line 4 and the refrigerant selectively supplied from the air conditioning unit.

[0116] Accordingly, coolant that exchanges heat with refrigerant at quencher 20 can be selectively supplied to electrical components 3 and battery module 5 to regulate the temperature of electrical components 3 and battery module 5.

[0117] The quencher 20 configured in this way can be arranged in parallel with the evaporator 17 via the first connecting line 21.

[0118] In an embodiment of the present invention, based on the refrigerant flow direction, the second expansion valve 23 may be disposed on the first connecting line 21 at the upstream end of the quencher 20.

[0119] When the electrical components 3 or battery module 5 are cooled by coolant that exchanges heat with the refrigerant in the vehicle's cooling mode, the second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21 and allow the expanded refrigerant to flow into the quencher 20.

[0120] In other words, when cooling the electrical components 3 or battery module 5 in the vehicle's cooling mode, the second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21 to reduce its temperature, and allow the expanded refrigerant to flow into the quencher 20, thereby further reducing the temperature of the coolant inside the quencher 20.

[0121] Accordingly, the coolant cooled as it passes through the quencher 20 can be introduced into the electrical components 3 or the battery module 5, thereby achieving more efficient cooling.

[0122] The second expansion valve 23 configured in this way can be a three-way electronic expansion valve having one inlet and two outlets, and configured to selectively expand the refrigerant while controlling the flow direction of the supplied refrigerant.

[0123] The upstream end of the quench 20 can be set based on the flow direction of the refrigerant. Based on the flow direction of the refrigerant along the first connecting line 21, the location where the refrigerant is introduced into the quench 20 can be defined as the upstream end of the quench 20, and the location where the refrigerant is discharged from the quench 20 can be defined as the downstream end of the quench 20.

[0124] In addition, the gas injection device 30 can be connected to the refrigerant line 11 between the internal condenser 13 and the heat exchanger 15.

[0125] The gas injection device 30 can selectively expand the refrigerant supplied from the internal condenser 13 or expand the refrigerant supplied to the heat exchanger 15 and allow the expanded refrigerant to flow. It can also selectively supply a portion of the supplied refrigerant to the compressor 10 to increase the flow rate of the refrigerant circulating through the refrigerant line 11.

[0126] The gas injection device 30 configured in this way can operate selectively in the vehicle's cooling mode, heating mode, or heating and dehumidification mode.

[0127] In an embodiment of the present invention, the first end of the second connecting line 41 can be connected to the refrigerant line 11 between the heat exchanger 15 and the first expansion valve 16. The second end of the second connecting line 41 can be connected to the gas injection device 30.

[0128] The first end of the third connecting line 42 can be connected to the second expansion valve 23. The second end of the third connecting line 42 can be connected to the refrigerant line 11 between the evaporator 17 and the receiver 18.

[0129] Additionally, the first end of the fourth connecting line 43 can be connected to the refrigerant line 11 between the heat exchanger 15 and the first end of the second connecting line 41. The second end of the fourth connecting line 43 can be connected to the gas injection device 30.

[0130] The gas injection device 30 may include: a flash tank 31, a first pipeline 32, a third expansion valve 33, a second pipeline 34, a third pipeline 35, and a fourth expansion valve 36.

[0131] The flash tank 31 can separate gaseous refrigerant and liquid refrigerant from the refrigerant introduced into it, and selectively discharge the separated refrigerant (i.e., selectively discharge gaseous refrigerant and liquid refrigerant).

[0132] The first end of the first pipeline 32 can be connected to the refrigerant pipeline 11 between the internal condenser 13 and the heat exchanger 15. The second end of the first pipeline 32 can be connected to the flash tank 31.

[0133] In an embodiment of the present invention, a third expansion valve 33 may be disposed on the first pipeline 32. The second end of the fourth connecting pipeline 43 may be connected to the third expansion valve 33.

[0134] The first pipeline 32 can selectively supply refrigerant from the internal condenser 13 to the flash tank 31 based on the operation of the third expansion valve 33.

[0135] In other words, the third expansion valve 33 can selectively expand the refrigerant introduced from the internal condenser 13 through the first line 32. The third expansion valve 33 can allow either the expanded or unexpanded refrigerant to flow into the first line 32 or the fourth connecting line 43.

[0136] The second line 34 can connect the flash tank 31 and the compressor 10. When refrigerant is supplied to the flash tank 31, the second line 34 can selectively supply gaseous refrigerant from the flash tank 31 to the compressor 10.

[0137] In other words, the second line 34 can connect the flash tank 31 and the compressor 10, so that the gaseous refrigerant separated at the flash tank 31 can be selectively introduced into the compressor 10.

[0138] In an embodiment of the present invention, the first end of the third pipeline 35 may be connected to the flash tank 31.

[0139] In addition, the second end of the third pipeline 35 and the second end of the second connecting pipeline 41 can be connected to the fourth expansion valve 36 respectively.

[0140] The heat pump system may further include a fifth connecting line 44.

[0141] The first end of the fifth connecting line 44 can be connected to the fourth expansion valve 36. The second end of the fifth connecting line 44 can be connected to the refrigerant line 11 at the upstream end of the heat exchanger 15.

[0142] The fourth expansion valve 36 can selectively expand the refrigerant discharged from the flash tank 31 to the third line 35, so that the expanded refrigerant can be supplied to the heat exchanger 15 through the fifth connecting line 44.

[0143] The fourth expansion valve 36 can supply refrigerant supplied from the flash tank 31 via the third line 35 to one or both of the first expansion valve 16 and the second expansion valve 23 without causing it to expand.

[0144] The third expansion valve 33 and the fourth expansion valve 36 can operate selectively in the vehicle's interior air conditioning modes (including the vehicle's interior cooling mode, heating mode, or heating and dehumidification mode), and can selectively expand the refrigerant while controlling the flow direction of the refrigerant supplied to the gas injection device 30.

[0145] In other words, the third expansion valve 33 and the fourth expansion valve 36 can be three-way electronic expansion valves, which have one inlet and two outlets and are configured to selectively expand the refrigerant while controlling the flow direction of the refrigerant.

[0146] In this configuration of the gas injection device 30, the flash tank 31 can operate while supplying expanded refrigerant in the air conditioning mode inside the vehicle.

[0147] In other words, the flash tank 31 can operate while expanded refrigerant is supplied from the third expansion valve 33 via the first line 32. The flash tank 31 can supply gaseous refrigerant in the supplied refrigerant to the compressor 10 via the second line 34 to increase the flow rate of refrigerant circulating through the refrigerant line 11.

[0148] When the gas injection device 30 is running in the vehicle's cooling mode, or when the gas injection device 30 is not running in the vehicle's heating and dehumidification mode, the fourth connecting line 43 can be connected by operating the third expansion valve 33.

[0149] In addition, when the gas injection device 30 is in operation, when ambient air heat is recovered in the vehicle interior heating mode, or when waste heat from electrical components and ambient air heat are recovered together in the vehicle interior heating mode, the fifth connecting line 44 can be connected through the fourth expansion valve 36.

[0150] Additionally, when recovering ambient air heat in the vehicle's interior heating mode, the third connecting line 42 can be selectively connected via the second expansion valve 23.

[0151] In other words, the second expansion valve 23 can connect to the third connecting line 42, so that the refrigerant introduced from the heat exchanger 15 through the refrigerant line 11 and the first connecting line 21 is supplied to the receiver 18 without passing through the quencher 20.

[0152] The second expansion valve 23 allows the introduced refrigerant to flow without expanding.

[0153] When recovering waste heat generated from electrical components 3 or battery module 5 in the vehicle's heating mode, the second expansion valve 23 can connect the first connecting line 21 to the quencher 20 and close the third connecting line 42. In this case, the second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21 and supply the expanded refrigerant to the quencher 20.

[0154] Accordingly, the quencher 20 can evaporate the refrigerant by heat exchange with the coolant supplied via the first coolant line 2 or the second coolant line 4.

[0155] The quencher 20 can recover waste heat from the electrical component 3 or battery module 5 when the refrigerant supplied from the second expansion valve 23 exchanges heat with the coolant supplied from the electrical component 3 or battery module 5.

[0156] Even when recovering waste heat generated from electrical components 3 or battery module 5, as well as ambient air heat, the second expansion valve 23 can connect to the first connection line 21 connected to the quencher 20 and can close the third connection line 42.

[0157] When the refrigerant that expands at the fourth expansion valve 36 passes through the heat exchanger 15 and is then introduced into the first connecting line 21, the second expansion valve 23 allows the introduced refrigerant to flow without expanding.

[0158] Accordingly, the heat exchanger 15 can evaporate the refrigerant while exchanging heat between the ambient air and the refrigerant supplied from the fourth expansion valve 36. The refrigerant can directly absorb heat from the ambient air as it passes through the heat exchanger 15.

[0159] Subsequently, the quencher 20 can further evaporate the refrigerant by heat exchange with the coolant supplied via the first coolant line 2 or the second coolant line 4.

[0160] The refrigerant can recover the waste heat of the electrical component 3 or battery module 5 by exchanging heat with the coolant supplied from the electrical component 3 or battery module 5 as it passes through the quencher 20.

[0161] The heat pump system may further include a first valve 51 and a second valve 52.

[0162] The first valve 51 can be installed on the refrigerant line 11 between the internal condenser 13 and the heat exchanger 15.

[0163] In addition, the second valve 52 can be installed on the refrigerant line 11 between the first end of the second connecting line 41 and the first end of the fourth connecting line 43.

[0164] The first valve 51 and the second valve 52 can each be configured as two-way valves and can selectively connect and disconnect the refrigerant line 11 to control the flow direction of the refrigerant in the selected vehicle air conditioning mode.

[0165] This configuration of the heat pump system can further include an auxiliary heat exchanger 60.

[0166] The secondary heat exchanger 60 can be connected to the second connecting line 41 and the refrigerant line 11 that connects the evaporator 17 and the compressor 10, respectively.

[0167] The secondary heat exchanger 60 allows the refrigerant supplied through the second connecting line 41 to exchange heat with the refrigerant supplied from the evaporator 17 or the quencher 20.

[0168] The auxiliary heat exchanger 60 can be a two-tube heat exchanger or a plate heat exchanger configured to allow refrigerants with different temperatures to exchange heat with each other.

[0169] The following is for reference Figures 2 to 7 The operation and function of the heat pump system configured according to an embodiment of the present invention are described in detail.

[0170] The following is for reference. Figure 2 The operation of the vehicle heat pump system according to an embodiment of the present invention is described in detail when the gas injection device 30 is operated in the cooling mode inside the vehicle and the battery module 5 needs to be cooled.

[0171] Figure 2 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in which the gas injection device is operated and the battery module is cooled in the cooling mode inside the vehicle.

[0172] refer to Figure 2 A portion of the refrigerant pipeline 11 connecting the internal condenser 13 and the heat exchanger 15 can be connected via the first valve 51.

[0173] Alternatively, the second valve 52 can be used to close a portion of the refrigerant line 11 that connects the first end of the fourth connecting line 43 to the first end of the second connecting line 41.

[0174] Alternatively, a portion of the first line 32 connecting the refrigerant line 11 to the third expansion valve 33 can be shut off.

[0175] The first line 32, which connects the third expansion valve 33 to the flash tank 31, can be connected. Additionally, the second line 34 can be connected.

[0176] In an embodiment of the present invention, the third pipeline 35 can be connected via the fourth expansion valve 36.

[0177] The first connecting line 21 can be connected via the second expansion valve 23. The second connecting line 41 can be connected via the fourth expansion valve 36.

[0178] The second expansion valve 23 can expand the refrigerant introduced through the second connecting line 41, a portion of the refrigerant line 11 and the first connecting line 21, and supply the expanded refrigerant to the quencher 20.

[0179] The third connecting line 42 can be closed using the second expansion valve 23. Additionally, the fourth connecting line 43 can be connected using the third expansion valve 33. Furthermore, the fifth connecting line 44 can be closed using the fourth expansion valve 36.

[0180] Accordingly, the refrigerant discharged from the internal condenser 13 can be introduced into the heat exchanger 15 along the connected refrigerant line 11. The heat exchanger 15 can condense the supplied refrigerant by exchanging heat with the ambient air.

[0181] The refrigerant that has passed through the heat exchanger 15 can be supplied to the third expansion valve 33 along the fourth connecting line 43.

[0182] The third expansion valve 33 allows the refrigerant introduced from the heat exchanger 15 through a portion of the refrigerant line 11 and the fourth connecting line 43 to expand. The third expansion valve 33 can then supply the expanded refrigerant to the flash tank 31 via the connected first line 32.

[0183] Accordingly, the expanded refrigerant can be introduced into the flash tank 31. The flash tank 31 can supply the gaseous refrigerant in the introduced refrigerant to the compressor 10 through the connected second line 34.

[0184] In other words, the gas injection device 30 can use the second line 34 to allow the gaseous refrigerant separated when passing through the flash tank 31 to flow back to the compressor 10, thereby increasing the flow rate of the refrigerant circulating through the refrigerant line 11.

[0185] The liquid refrigerant stored in the flash tank 31 can flow along the third line 35 and the second connecting line 41, which are connected by the operation of the fourth expansion valve 36.

[0186] The fourth expansion valve 36 allows refrigerant supplied from the flash tank 31 through the third line 35 to flow into the second connecting line 41 without causing it to expand.

[0187] The refrigerant flowing along the second connecting line 41 can pass through the auxiliary heat exchanger 60.

[0188] A portion of the refrigerant that has passed through the secondary heat exchanger 60 can be introduced into the second expansion valve 23 along the second connecting line 41, a portion of the refrigerant line 11, and the first connecting line 21.

[0189] The second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21. Then, the second expansion valve 23 can supply the expanded refrigerant to the quencher 20.

[0190] The refrigerant introduced into the quencher 20 can cool the coolant while exchanging heat with the coolant supplied from the battery module 5 through the second coolant line 4.

[0191] The coolant cooled at the quencher 20 can be supplied to the battery module 5 along the second coolant line 4. Accordingly, the battery module 5 can be effectively cooled by the coolant cooled at the quencher 20.

[0192] In other words, the coolant circulating through the second coolant line 4 can effectively cool the battery module 5 when the above operation is repeated.

[0193] The remaining refrigerant in the refrigerant that has passed through the secondary heat exchanger 60, except for the refrigerant introduced into the first connecting line 21, can be introduced into the first expansion valve 16 along the refrigerant line 11.

[0194] The first expansion valve 16 can expand the introduced refrigerant and supply the expanded refrigerant to the evaporator 17.

[0195] The ambient air introduced into the HVAC module 12 can be cooled by the low-temperature refrigerant introduced into the evaporator 17 as it passes through the evaporator 17.

[0196] Opening / closing door 14 can close the portion passing through the internal condenser 13, preventing the cooling ambient air from passing through the internal condenser 13. Therefore, the cooling ambient air can be introduced directly into the vehicle interior to cool the vehicle interior.

[0197] The refrigerant that has passed through the evaporator 17 and the quencher 20 can pass through the auxiliary heat exchanger 60 along the refrigerant line 11.

[0198] The auxiliary heat exchanger 60 can additionally condense the refrigerant supplied from the flash tank 31 via the third line 35 and the second connecting line 41 by exchanging heat with the refrigerant supplied from the evaporator 17 and the quencher 20, respectively.

[0199] The refrigerant supplied from the evaporator 17 and quench 20, and having already passed through the secondary heat exchanger 60, can be introduced into the receiver 18 along the refrigerant line 11. Afterward, the refrigerant can pass through the receiver 18 and be introduced into the compressor 10.

[0200] In other words, refrigerant already supplied through receiver 18 and refrigerant supplied from flash tank 31 via second line 34 can be introduced into compressor 10. The introduced refrigerant can be compressed by compressor 10.

[0201] The refrigerant compressed at compressor 10 can pass through internal condenser 13 and then be supplied to heat exchanger 15 along refrigerant line 11.

[0202] The heat pump system can repeat the above process.

[0203] In other words, the heat pump system can increase the flow rate of refrigerant flowing along refrigerant line 11 when the above operation is repeated.

[0204] In addition, the heat pump system can increase the flow rate of refrigerant along the refrigerant line 11 to improve overall cooling performance and efficiency, and effectively cool the vehicle interior.

[0205] The heat pump system can effectively cool the battery module 5 by utilizing the cryogenic coolant cooled at the quencher 20.

[0206] The following is for reference. Figure 3 The operation of the vehicle heat pump system according to an embodiment of the present invention is described in detail when the gas injection device 30 is operated in the heating mode inside the vehicle and the waste heat of the electrical components 3 is recovered.

[0207] Figure 3 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in which the gas injection device is operated and waste heat from electrical components is recovered in the heating mode inside the vehicle.

[0208] refer to Figure 3 The heat pump system can recover waste heat from electrical components 3 when the gas injection device 30 is running.

[0209] In other words, when the gas injection device 30 is running in the vehicle's interior heating mode, the operation of the first expansion valve 16 can be stopped. Accordingly, the supply of refrigerant to the evaporator 17 can be stopped.

[0210] In this state, the first valve 51 can be used to close a portion of the refrigerant line 11 that connects the first end of the first line 32 to the heat exchanger 15.

[0211] A portion of the refrigerant line 11 that connects the first end of the first connecting line 21 to the compressor 10 can be connected.

[0212] Alternatively, the first expansion valve 16 can be used to close a portion of the refrigerant line 11 that connects the second end of the first connecting line 21 to the evaporator 17.

[0213] Alternatively, a portion of the refrigerant line 11 connecting the evaporator 17 to the first end of the first connecting line 21 can be shut off.

[0214] The second valve 52 can be used to close a portion of the refrigerant line 11 that connects the heat exchanger 15 to the first end of the second connecting line 41.

[0215] In an embodiment of the present invention, the first pipeline 32 can be connected via the third expansion valve 33. Additionally, the second pipeline 34 can be connected.

[0216] Alternatively, the third pipeline 35 can be connected via the fourth expansion valve 36.

[0217] The first connecting line 21 can be connected via the second expansion valve 23. The second connecting line 41 can be connected via the fourth expansion valve 36.

[0218] Additionally, the third connecting line 42 can be shut off using the second expansion valve 23. The fourth connecting line 43 can be shut off using the third expansion valve 33. Additionally, the fifth connecting line 44 can be shut off using the fourth expansion valve 36.

[0219] The third expansion valve 33 can expand the refrigerant supplied from the internal condenser 13 through the first line 32. Then, the third expansion valve 33 can supply the expanded refrigerant to the flash tank 31 through the first line 32.

[0220] Additionally, the fourth expansion valve 36 allows refrigerant supplied from the flash tank 31 via the third line 35 to flow into the second connecting line 41 without causing it to expand.

[0221] Accordingly, the flash tank 31 can supply gaseous refrigerant from the refrigerant introduced inside to the compressor 10 through the connected second pipeline 34.

[0222] In other words, the gas injection device 30 can use the second line 34 to allow the gaseous refrigerant separated when passing through the flash tank 31 to flow back to the compressor 10, thereby increasing the flow rate of the refrigerant circulating through the refrigerant line 11.

[0223] The refrigerant flowing along the second connecting line 41 can pass through the auxiliary heat exchanger 60, and then through a portion of the refrigerant line 11 and the first connecting line 21 into the second expansion valve 23.

[0224] The second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21. Then, the second expansion valve 23 can supply the expanded refrigerant to the quencher 20.

[0225] The refrigerant introduced into the quencher 20 can cool the coolant while exchanging heat with the coolant supplied from the electrical component 3 through the first coolant line 2.

[0226] The coolant can be heated by recovering waste heat from the electrical component 3 while cooling it. The coolant heated in this way can then be supplied to the quencher 20.

[0227] The quencher 20 can recover waste heat from the electrical component 3 when the coolant supplied from the electrical component 3 through the first coolant line 2 exchanges heat with the refrigerant.

[0228] The refrigerant that has recovered the waste heat of the electrical components 3 at the quencher 20 can be supplied to the compressor 10 by passing through the auxiliary heat exchanger 60 and the receiver 18 in sequence along the refrigerant line 11 connected to the first connection line 21.

[0229] In other words, refrigerant already supplied through receiver 18 and refrigerant supplied from flash tank 31 via second line 34 can be introduced into compressor 10. The introduced refrigerant can be compressed by compressor 10.

[0230] The refrigerant compressed at compressor 10 can be supplied to the internal condenser 13 along refrigerant line 11. The refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air introduced into HVAC module 12.

[0231] The door 14 can be opened to allow ambient air, which has already passed through the evaporator 17, to be introduced into the HVAC module 12 and then through the internal condenser 13.

[0232] Accordingly, when passing through the evaporator 17, which is not supplied with refrigerant, ambient air introduced from the outside can be introduced at room temperature without being cooled. The introduced ambient air can be converted to a high-temperature state when passing through the internal condenser 13, and then introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0233] Additionally, as described above, the refrigerant condensed at the internal condenser 13 can be introduced into the third expansion valve 33 via the first line 32. Subsequently, the refrigerant can be supplied to the flash tank 31 along the first line 32 while expanded by the third expansion valve 33.

[0234] Therefore, the heat pump system according to an embodiment of the present invention can operate the gas injection device 30 together with the vehicle while it is in motion, so as to smoothly recover waste heat from the coolant whose temperature rises when passing through the electrical components 3 at the quencher 20, thereby improving the overall heating performance and efficiency.

[0235] In addition, the present invention can improve heating efficiency and performance while minimizing the use of a separate electric heater.

[0236] In addition, the gas injection device 30 can increase the flow rate of refrigerant circulating through the refrigerant line 11, thereby maximizing the heating performance.

[0237] In an embodiment of the present invention, waste heat from electrical component 3 is recovered, but not limited thereto, at least one of waste heat from electrical component 3 or waste heat from battery module 5 may be selectively recovered.

[0238] The following is for reference. Figure 4 The operation of the vehicle heat pump system according to an embodiment of the present invention is described in detail when the gas injection device 30 is operated and ambient air heat is recovered in the heating mode inside the vehicle.

[0239] Figure 4 This is an operational diagram of the vehicle heat pump system according to an embodiment of the present invention, in which the gas injection device is operated and ambient air heat is recovered during the vehicle's interior heating mode.

[0240] refer to Figure 4 The heat pump system can absorb heat from the ambient air while the gas injection device 30 is in operation.

[0241] In other words, when the gas injection device 30 is running in the vehicle's interior heating mode, the operation of the first expansion valve 16 can be stopped. Accordingly, the supply of refrigerant to the evaporator 17 can be stopped.

[0242] In this state, the first valve 51 can be used to close a portion of the refrigerant line 11 that connects the first end of the first line 32 to the second end of the fifth connecting line 44.

[0243] A portion of the refrigerant line 11 connecting the heat exchanger 15 to the second end of the first connecting line 21 can be opened via the second valve 52. A portion of the refrigerant line 11 connecting the second end of the first connecting line 21 to the evaporator 17 can be closed via the first expansion valve 16.

[0244] Alternatively, a portion of the refrigerant line 11 connecting the evaporator 17 to the second end of the third connecting line 42 can be shut off.

[0245] Alternatively, a portion of the refrigerant line 11 that connects the second end of the third connecting line 42 to the compressor 10 can be connected.

[0246] In an embodiment of the present invention, the first pipeline 32 can be connected via the third expansion valve 33. Additionally, the second pipeline 34 can be connected.

[0247] Alternatively, the third pipeline 35 can be connected via the fourth expansion valve 36.

[0248] A portion of the first connecting line 21, which connects the refrigerant line 11 to the second expansion valve 23, can be connected through the second expansion valve 23.

[0249] The first connecting line 21, which connects the quencher 20 to the refrigerant line 11 connected to the compressor 10, can be closed by the second expansion valve 23.

[0250] The second connecting line 41 can be closed using the fourth expansion valve 36. Conversely, the third connecting line 42 can be connected using the second expansion valve 23.

[0251] The second expansion valve 23 allows refrigerant introduced from the heat exchanger 15 through a portion of the refrigerant line 11 and the first connecting line 21 to flow into the third connecting line 42 without causing it to expand.

[0252] The fourth connecting line 43 can be closed using the third expansion valve 33. Conversely, the fifth connecting line 44 can be connected using the fourth expansion valve 36.

[0253] The third expansion valve 33 can expand the refrigerant supplied from the internal condenser 13 through the first line 32. Then, the third expansion valve 33 can supply the expanded refrigerant to the flash tank 31 through the first line 32.

[0254] Accordingly, the flash tank 31 can supply gaseous refrigerant from the refrigerant introduced inside to the compressor 10 through the connected second pipeline 34.

[0255] In other words, the gas injection device 30 can use the second line 34 to allow the gaseous refrigerant separated when passing through the flash tank 31 to flow back to the compressor 10, thereby increasing the flow rate of the refrigerant circulating through the refrigerant line 11.

[0256] The fourth expansion valve 36 can expand the refrigerant supplied from the flash tank 31 through the third line 35. Then, the fourth expansion valve 36 can allow the expanded refrigerant to flow into the fifth connecting line 44.

[0257] The refrigerant flowing along the fifth connecting line 44 can be introduced into the heat exchanger 15 along a portion of the refrigerant line 11.

[0258] In other words, the liquid refrigerant stored in the flash tank 31 can be expanded by the operation of the fourth expansion valve 36 and can flow into the heat exchanger 15 along the refrigerant line 11 connected to the fifth connecting line 44.

[0259] The heat exchanger 15 can evaporate the refrigerant while exchanging heat between the ambient air and the refrigerant supplied from the fourth expansion valve 36. The refrigerant can directly absorb heat from the ambient air.

[0260] The refrigerant that has passed through the heat exchanger 15 can be introduced into the second expansion valve 23 along the refrigerant line 11 and the connected first connecting line 21. The second expansion valve 23 allows the refrigerant introduced through the first connecting line 21 to flow into the third connecting line 42 without causing it to expand.

[0261] The first coolant line 2 and the second coolant line 4 can be shut off. Accordingly, coolant will not flow into the quencher 20.

[0262] The refrigerant flowing through the third connecting line 42 can pass sequentially along the refrigerant line 11 through the auxiliary heat exchanger 60 and the receiver 18. Afterwards, the refrigerant can be supplied to the compressor 10.

[0263] In other words, the refrigerant that has recovered heat from the ambient air while passing through the heat exchanger 15 can be supplied to the compressor 10 via the receiver 18.

[0264] Accordingly, the refrigerant already supplied through the receiver 18 and the refrigerant supplied from the flash tank 31 through the second line 34 can be introduced into the compressor 10. The introduced refrigerant can be compressed by the compressor 10.

[0265] The refrigerant compressed at compressor 10 can be supplied to the internal condenser 13 along refrigerant line 11. The refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air introduced into HVAC module 12.

[0266] The door 14 can be opened to allow ambient air, which has already passed through the evaporator 17, to be introduced into the HVAC module 12 and then through the internal condenser 13.

[0267] Accordingly, when passing through the evaporator 17, which is not supplied with refrigerant, ambient air introduced from the outside can be introduced at room temperature without being cooled. The introduced ambient air can be converted to a high-temperature state when passing through the internal condenser 13, and then introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0268] In addition, the refrigerant condensed at the internal condenser 13 can be supplied to the flash tank 31 along the first pipeline 32 while being expanded by the third expansion valve 33.

[0269] Therefore, the heat pump system according to an embodiment of the present invention can operate the gas injection device 30 together with the vehicle while it is in motion to recover ambient air heat at the heat exchanger 15, thereby improving overall heating performance and efficiency.

[0270] In addition, the present invention can improve heating efficiency and performance while minimizing the use of a separate electric heater.

[0271] In addition, the gas injection device 30 can increase the flow rate of refrigerant circulating through the refrigerant line 11, thereby maximizing the heating performance.

[0272] The embodiments of the present invention recover ambient air heat, but are not limited thereto. In addition to recovering ambient air heat, waste heat from electrical components 3 or battery modules 5 can also be recovered together.

[0273] The following is for reference. Figure 5 The operation of the vehicle heat pump system according to an embodiment of the present invention is described in detail when the gas injection device 30 is operated in the heating mode inside the vehicle and together the waste heat of the electrical components 3 and the ambient air heat are recovered.

[0274] Figure 5 This is an operational diagram of a vehicle heat pump system according to an embodiment of the present invention, in which the gas injection device is operated in the vehicle's interior heating mode and together the waste heat from electrical components and ambient air heat is recovered.

[0275] refer to Figure 5 The heat pump system can absorb waste heat from electrical components 3 and absorb ambient air heat from the ambient air while the gas injection device 30 is in operation.

[0276] In other words, when the gas injection device 30 is running in the vehicle's interior heating mode, the operation of the first expansion valve 16 can be stopped. Accordingly, the supply of refrigerant to the evaporator 17 can be stopped.

[0277] In this state, the first valve 51 can be used to close a portion of the refrigerant line 11 that connects the first end of the first line 32 to the second end of the fifth connecting line 44.

[0278] A portion of the refrigerant line 11 connecting the heat exchanger 15 to the second end of the first connecting line 21 can be opened via the second valve 52. A portion of the refrigerant line 11 connecting the second end of the first connecting line 21 to the evaporator 17 can be closed via the first expansion valve 16.

[0279] Alternatively, a portion of the refrigerant line 11 connecting the evaporator 17 to the first end of the first connecting line 21 can be shut off. Alternatively, a portion of the refrigerant line 11 connecting the first end of the first connecting line 21 to the compressor 10 can be connected.

[0280] In an embodiment of the present invention, the first pipeline 32 can be connected via the third expansion valve 33. Additionally, the second pipeline 34 can be connected.

[0281] Alternatively, the third pipeline 35 can be connected via the fourth expansion valve 36.

[0282] The first connecting line 21 can be connected via the second expansion valve 23. The second connecting line 41 can be closed via the fourth expansion valve 36. Additionally, the third connecting line 42 can be closed via the second expansion valve 23.

[0283] The fourth connecting line 43 can be closed using the third expansion valve 33. Conversely, the fifth connecting line 44 can be connected using the fourth expansion valve 36.

[0284] The third expansion valve 33 can expand the refrigerant supplied from the internal condenser 13 through the first line 32. Then, the third expansion valve 33 can supply the expanded refrigerant to the flash tank 31 through the first line 32.

[0285] Accordingly, the flash tank 31 can supply gaseous refrigerant from the refrigerant introduced inside to the compressor 10 through the connected second pipeline 34.

[0286] In other words, the gas injection device 30 can use the second line 34 to allow the gaseous refrigerant separated when passing through the flash tank 31 to flow back to the compressor 10, thereby increasing the flow rate of the refrigerant circulating through the refrigerant line 11.

[0287] The fourth expansion valve 36 can expand the refrigerant supplied from the flash tank 31 through the third line 35. Then, the fourth expansion valve 36 can allow the expanded refrigerant to flow into the fifth connecting line 44.

[0288] The refrigerant flowing along the fifth connecting line 44 can be introduced into the heat exchanger 15 along a portion of the refrigerant line 11.

[0289] In other words, the liquid refrigerant stored in the flash tank 31 can be expanded by the operation of the fourth expansion valve 36 and can flow into the heat exchanger 15 along the refrigerant line 11 connected to the fifth connecting line 44.

[0290] The heat exchanger 15 can evaporate the refrigerant while exchanging heat between the ambient air and the refrigerant supplied from the fourth expansion valve 36. The refrigerant can directly absorb heat from the ambient air.

[0291] The refrigerant that has passed through the heat exchanger 15 can be introduced into the second expansion valve 23 along the refrigerant line 11 and the connected first connection line 21.

[0292] The second expansion valve 23 can supply refrigerant introduced from the heat exchanger 15 through a portion of the refrigerant line 11 and the first connecting line 21 to the quencher 20 without causing it to expand.

[0293] The refrigerant introduced into the quencher 20 can cool the coolant while exchanging heat with the coolant supplied from the electrical component 3 through the first coolant line 2.

[0294] The coolant can be heated by recovering waste heat from the electrical component 3 while cooling it. The coolant heated in this way can then be supplied to the quencher 20.

[0295] The quencher 20 can recover waste heat from the electrical component 3 when the coolant supplied from the electrical component 3 through the first coolant line 2 exchanges heat with the refrigerant.

[0296] The refrigerant that has recovered the waste heat of the electrical components 3 at the quencher 20 can be supplied to the compressor 10 by passing through the auxiliary heat exchanger 60 and the receiver 18 in sequence along the refrigerant line 11 connected to the first connection line 21.

[0297] In other words, refrigerant already supplied through receiver 18 and refrigerant supplied from flash tank 31 via second line 34 can be introduced into compressor 10. The introduced refrigerant can be compressed by compressor 10.

[0298] The refrigerant compressed at compressor 10 can be supplied to the internal condenser 13 along refrigerant line 11. The refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air introduced into HVAC module 12.

[0299] The door 14 can be opened to allow ambient air, which has already passed through the evaporator 17, to be introduced into the HVAC module 12 and then through the internal condenser 13.

[0300] Accordingly, when passing through the evaporator 17, which is not supplied with refrigerant, ambient air introduced from the outside can be introduced at room temperature without being cooled. The introduced ambient air can be converted to a high-temperature state when passing through the internal condenser 13, and then introduced into the vehicle interior, thereby achieving heating of the vehicle interior.

[0301] Additionally, as described above, the refrigerant condensed at the internal condenser 13 can be introduced into the third expansion valve 33 via the first line 32. Subsequently, the refrigerant can be supplied to the flash tank 31 along the first line 32 while expanded by the third expansion valve 33.

[0302] Therefore, the heat pump system according to an embodiment of the present invention can operate the gas injection device 30 together with the vehicle while it is in motion, so as to smoothly recover waste heat from the coolant whose temperature rises when passing through the electrical components 3 at the quencher 20.

[0303] The heat pump system can recover ambient air heat at the heat exchanger 15, thereby improving overall heating performance and efficiency.

[0304] In addition, the present invention can improve heating efficiency and performance while minimizing the use of a separate electric heater.

[0305] In addition, the gas injection device 30 can increase the flow rate of refrigerant circulating through the refrigerant line 11, thereby maximizing the heating performance.

[0306] In an embodiment of the present invention, ambient air heat and waste heat from electrical component 3 are recovered together, but not limited thereto, at least one of the waste heat from electrical component 3 or waste heat from battery module 5 may be selectively recovered.

[0307] The following is for reference. Figure 6 The operation of the gas injection device 30 in the heating and dehumidification mode of the vehicle interior according to an embodiment of the present invention is described in detail.

[0308] Figure 6 This is an operational diagram of the gas injection device operating in the heating and dehumidification mode inside the vehicle according to an embodiment of the present invention.

[0309] refer to Figure 6 The first expansion valve 16 can connect a portion of the refrigerant line 11 that connects the evaporator 17 to the compressor 10. Simultaneously, the first expansion valve 16 can connect a portion of the refrigerant line 11 that connects the second end of the first connecting line 21 to the evaporator 17.

[0310] Additionally, the first valve 51 can be used to close a portion of the refrigerant line 11 connecting the first end of the first line 32 to the heat exchanger 15. Furthermore, the second valve 52 can be used to close a portion of the refrigerant line 11 connecting the heat exchanger 15 to the first end of the second connecting line 41.

[0311] In an embodiment of the present invention, the first pipeline 32 can be connected via the third expansion valve 33. Additionally, the second pipeline 34 can be connected.

[0312] Alternatively, the third pipeline 35 can be connected via the fourth expansion valve 36.

[0313] The first connecting line 21 can be connected via the second expansion valve 23. The second connecting line 41 can be connected via the fourth expansion valve 36.

[0314] Additionally, the third connecting line 42 can be shut off using the second expansion valve 23. The fourth connecting line 43 can be shut off using the third expansion valve 33. Additionally, the fifth connecting line 44 can be shut off using the fourth expansion valve 36.

[0315] The third expansion valve 33 can expand the refrigerant supplied from the internal condenser 13 through the first line 32. Then, the third expansion valve 33 can supply the expanded refrigerant to the flash tank 31 through the first line 32.

[0316] Additionally, the fourth expansion valve 36 allows refrigerant supplied from the flash tank 31 via the third line 35 to flow into the second connecting line 41 without causing it to expand.

[0317] Accordingly, the flash tank 31 can supply gaseous refrigerant from the refrigerant introduced inside to the compressor 10 through the connected second pipeline 34.

[0318] In other words, the gas injection device 30 can use the second line 34 to allow the gaseous refrigerant separated when passing through the flash tank 31 to flow back to the compressor 10, thereby increasing the flow rate of the refrigerant circulating through the refrigerant line 11.

[0319] The refrigerant flowing along the second connecting line 41 can pass through the auxiliary heat exchanger 60.

[0320] A portion of the refrigerant that has passed through the secondary heat exchanger 60 can be introduced into the second expansion valve 23 along the second connecting line 41, a portion of the refrigerant line 11, and the first connecting line 21.

[0321] The second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21. Then, the second expansion valve 23 can supply the expanded refrigerant to the quencher 20.

[0322] The refrigerant supplied to the quencher 20 can cool the coolant while exchanging heat with the coolant supplied from the electrical components 3 through the first coolant line 2.

[0323] The coolant can be heated by recovering waste heat from the electrical component 3 while cooling it. The coolant heated in this way can then be supplied to the quencher 20.

[0324] The quencher 20 can recover waste heat from the electrical component 3 when the coolant supplied from the electrical component 3 through the first coolant line 2 exchanges heat with the refrigerant.

[0325] The remaining refrigerant in the refrigerant that has passed through the secondary heat exchanger 60 can be introduced into the first expansion valve 16 along the refrigerant line 11. The first expansion valve 16 can expand the refrigerant introduced through the refrigerant line 11 and supply the expanded refrigerant to the evaporator 17.

[0326] The refrigerant that has passed through the evaporator 17 and the quencher 20 can pass through the auxiliary heat exchanger 60 along the refrigerant line 11.

[0327] The secondary heat exchanger 60 can additionally condense the refrigerant supplied from the flash tank 31 via the second connecting line 41 by exchanging heat with the refrigerants supplied from the evaporator 17 and the quencher 20, respectively.

[0328] The refrigerant supplied from the evaporator 17 and quench 20, and having passed through the secondary heat exchanger 60, can be introduced into the receiver 18 along the refrigerant line 11. Afterward, the refrigerant can be supplied to the compressor 10 through the receiver 18.

[0329] In other words, refrigerant already supplied through receiver 18 and refrigerant supplied from flash tank 31 via second line 34 can be introduced into compressor 10. The introduced refrigerant can be compressed by compressor 10.

[0330] The refrigerant compressed at compressor 10 can be supplied to the internal condenser 13 along refrigerant line 11. The refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air introduced into HVAC module 12.

[0331] The door 14 can be opened to allow ambient air, which has already passed through the evaporator 17, to be introduced into the HVAC module 12 and then through the internal condenser 13.

[0332] The air introduced into the HVAC module 12 can be dehumidified by the low-temperature refrigerant introduced into the evaporator 17 as it passes through the evaporator 17.

[0333] Then, the dehumidified air can be transformed into a high-temperature state when passing through the internal condenser 13 and introduced into the vehicle interior, thereby successfully heating and dehumidifying the vehicle interior.

[0334] The following is for reference. Figure 7 The operation of the heat pump system of the vehicle according to an embodiment of the present invention is described in detail, in the heating and dehumidification mode inside the vehicle, without the gas injection device 30 being operated.

[0335] Figure 7 This is an operational diagram of the heat pump system of a vehicle according to an embodiment of the present invention, in the heating and dehumidification mode inside the vehicle without the gas injection device operating.

[0336] refer to Figure 7 The first expansion valve 16 can connect a portion of the refrigerant line 11 that connects the evaporator 17 to the compressor 10. Simultaneously, the first expansion valve 16 can connect a portion of the refrigerant line 11 that connects the second end of the first connecting line 21 to the evaporator 17.

[0337] Alternatively, a portion of the refrigerant line 11 connecting the first end of the first line 32 to the heat exchanger 15 can be closed using the first valve 51. Additionally, a portion of the refrigerant line 11 connecting the heat exchanger 15 to the first end of the fourth connecting line 43 can be closed.

[0338] A portion of the refrigerant pipeline 11, which connects the first end of the fourth connecting pipeline 43 to the first expansion valve 16, can be connected via the second valve 52.

[0339] In an embodiment of the present invention, a portion of the first pipeline 32 can be connected via the third expansion valve 33, so that the internal condenser 13 can be connected to the third expansion valve 33.

[0340] Additionally, the first pipeline 32, which connects the flash tank 31 to the third expansion valve 33, can be shut off via the third expansion valve 33. Furthermore, the second pipeline 34 can be shut off.

[0341] In an embodiment of the invention, the third pipeline 35 can be shut off via the fourth expansion valve 36. Accordingly, the operation of the flash tank 31 and the fourth expansion valve 36 can be stopped.

[0342] The first connecting line 21 can be connected via the second expansion valve 23. The second connecting line 41 can be closed via the fourth expansion valve 36.

[0343] Additionally, the third connecting line 42 can be closed using the second expansion valve 23. The fourth connecting line 43 can be connected using the third expansion valve 33. Additionally, the fifth connecting line 44 can be closed using the fourth expansion valve 36.

[0344] Accordingly, the refrigerant discharged from the internal condenser 13 can be introduced into the third expansion valve 33 through a portion of the refrigerant line 11 and the first line 32.

[0345] The third expansion valve 33 allows refrigerant supplied from the internal condenser 13 through the first line 32 to flow into the fourth connecting line 43 without causing it to expand.

[0346] A portion of the refrigerant flowing along the fourth connecting line 43 can be introduced into the second expansion valve 23 through a portion of the refrigerant line 11 and the first connecting line 21.

[0347] The second expansion valve 23 can expand the refrigerant introduced through the first connecting line 21. Then, the second expansion valve 23 can supply the expanded refrigerant to the quencher 20.

[0348] The refrigerant supplied to the quencher 20 can cool the coolant while exchanging heat with the coolant supplied from the electrical components 3 through the first coolant line 2.

[0349] The coolant can be heated by recovering waste heat from the electrical component 3 while cooling it. The coolant heated in this way can then be supplied to the quencher 20.

[0350] The quencher 20 can recover waste heat from the electrical component 3 when the coolant supplied from the electrical component 3 through the first coolant line 2 exchanges heat with the refrigerant.

[0351] The remaining refrigerant in the refrigerant flowing along the fourth connecting line 43 can be introduced into the first expansion valve 16 along the refrigerant line 11. The first expansion valve 16 can expand the refrigerant introduced through the refrigerant line 11 and supply the expanded refrigerant to the evaporator 17.

[0352] The refrigerant, having passed through the evaporator 17 and quench 20 respectively, can then pass sequentially along the refrigerant line 11 through the auxiliary heat exchanger 60 and the receiver 18. Afterward, the refrigerant can be supplied to the compressor 10.

[0353] In other words, only the refrigerant that has passed through the receiver 18 can be introduced into the compressor 10. The introduced refrigerant can then be compressed by the compressor 10.

[0354] The refrigerant compressed at compressor 10 can be supplied to the internal condenser 13 along refrigerant line 11. The refrigerant supplied to the internal condenser 13 can raise the temperature of the ambient air introduced into HVAC module 12.

[0355] Door 14 can be opened to allow ambient air introduced into HVAC module 12 and already passing through evaporator 17 to pass through internal condenser 13. The air introduced into HVAC module 12 can be dehumidified by the low-temperature refrigerant introduced into evaporator 17 as it passes through evaporator 17.

[0356] Then, the dehumidified air can be converted to a high temperature state when passing through the internal condenser 13 and introduced into the vehicle interior, and can smoothly heat and dehumidify the vehicle interior without operating the gas injection device 30.

[0357] Therefore, as described above, the vehicle heat pump system according to the embodiment of the present invention can recover waste heat from electrical components 3 and battery module 5 according to the air conditioning mode inside the vehicle by using a cooler 20 that allows heat exchange between coolant and refrigerant, and can regulate the temperature of battery module 5.

[0358] In addition, the present invention can increase the refrigerant flow rate by applying a gas injection device 30 (which operates selectively in the selected air conditioning mode inside the vehicle), thereby improving the cooling and heating performance of the system.

[0359] Furthermore, according to the present invention, by using the gas injection device 30, the performance of the system can be maximized while minimizing the required system components, and correspondingly, the system can be streamlined and simplified.

[0360] Furthermore, according to an embodiment of the present invention, by effectively regulating the temperature of the battery module 5, the optimal performance of the battery module 5 can be achieved, and the total driving range of the vehicle can be increased due to the effective management of the battery module 5.

[0361] In addition, the present invention can improve heating efficiency by selectively utilizing heat from external heat sources or waste heat from electrical components 3 in the heating mode inside the vehicle.

[0362] Furthermore, according to the present invention, by streamlining the entire system, manufacturing costs and weight can be reduced, and space utilization of the system and vehicle can be improved.

[0363] While the invention has been described in conjunction with embodiments now considered practical, it should be understood that the invention is not limited to the disclosed embodiments. Rather, the invention is intended to cover various modified embodiments and equivalent embodiments included within the spirit and scope of the appended claims.

Claims

1. A heat pump system for a vehicle, the heat pump system comprising: A compressor, configured to compress refrigerant; A heating, ventilation, and air conditioning module, comprising an internal condenser and an evaporator, and an open / close door, wherein the internal condenser and evaporator are connected to a compressor via refrigerant lines, and the open / close door is configured to selectively introduce air that has already passed through the evaporator into the internal condenser based on cooling or heating of the vehicle interior. A heat exchanger connected to an internal condenser via a refrigerant line, the heat exchanger being configured to condense or evaporate the refrigerant by exchanging heat between the refrigerant and air; The first expansion valve is installed on the refrigerant line between the heat exchanger and the evaporator; The first connecting pipeline has a first end connected to the refrigerant pipeline between the evaporator and the compressor, and a second end connected to the refrigerant pipeline between the heat exchanger and the first expansion valve. A quencher is disposed on a first connecting line, the quencher being configured to allow heat exchange between the refrigerant introduced through the first connecting line and the coolant to regulate the temperature of the coolant. The second expansion valve is installed on the first connecting pipeline at the upstream end of the quencher; A gas injection device connected to the refrigerant line between the internal condenser and the heat exchanger, the gas injection device being configured to selectively expand the refrigerant supplied from the internal condenser or to expand the refrigerant supplied to the heat exchanger and to allow the refrigerant expanded by the gas injection device to flow, and to selectively supply a portion of the refrigerant supplied to the gas injection device to the compressor to increase the flow rate of the refrigerant circulating through the refrigerant line; The second connecting pipeline has a first end connected to the refrigerant pipeline between the heat exchanger and the first expansion valve, and a second end connected to the gas injection device. The third connecting line has a first end connected to the second expansion valve and a second end connected to the refrigerant line between the evaporator and the compressor. as well as The fourth connecting line has its first end connected to the refrigerant line between the heat exchanger and the first end of the second connecting line, and its second end connected to the gas injection device.

2. The vehicle heat pump system according to claim 1, wherein, The gas injection device includes: A flash tank is configured to separate refrigerant into gaseous and liquid refrigerant, and selectively discharge the gaseous and liquid refrigerant. The first pipeline has a first end connected to the refrigerant pipeline between the internal condenser and the heat exchanger, and a second end connected to the flash tank. The third expansion valve is installed on the first pipeline; A second line connects the compressor and the flash tank, and the second line is configured to selectively supply gaseous refrigerant from the flash tank to the compressor; A third pipeline, the first end of which is connected to the flash tank; and A fourth expansion valve, which is connected to the second end of the third line and the second end of the second connecting line, is configured to selectively expand the refrigerant discharged from the flash tank through the third line.

3. The vehicle heat pump system according to claim 2, wherein, The fourth expansion valve is configured as follows: Selectively expand the refrigerant supplied from the flash tank and supply the refrigerant expanded by the fourth expansion valve to the heat exchanger; or The refrigerant supplied from the flash tank is supplied to the first expansion valve, the second expansion valve, or a combination of the first expansion valve and the second expansion valve without causing it to expand.

4. The vehicle heat pump system according to claim 2, wherein, The third expansion valve and the fourth expansion valve are configured to operate selectively in a cooling mode, a heating mode, or a heating and dehumidification mode inside the vehicle, and to selectively expand the refrigerant while controlling the flow direction of the refrigerant.

5. The vehicle heat pump system according to claim 2, wherein, The flash tank is configured to operate when refrigerant expanded by the third expansion valve is supplied from the third expansion valve via a first line, and the flash tank is further configured to supply gaseous refrigerant in the supplied refrigerant to the compressor via a second line to increase the flow rate of refrigerant circulating through the refrigerant line.

6. The vehicle heat pump system according to claim 2, wherein, The second end of the fourth connecting line is connected to the third expansion valve.

7. The vehicle heat pump system according to claim 2, further comprising: The fifth connecting pipeline has its first end connected to the fourth expansion valve and its second end connected to the refrigerant pipeline at the upstream end of the heat exchanger. The first valve is located on the refrigerant line between the internal condenser and the heat exchanger; as well as The second valve is located on the refrigerant line between the first end of the second connecting line and the first end of the fourth connecting line.

8. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is running in the vehicle's interior cooling mode and the battery module needs to be cooled: A portion of the refrigerant line connecting the internal condenser and the heat exchanger is configured to be connected via a first valve; A portion of the refrigerant pipeline connecting the first end of the fourth connecting pipeline to the first end of the second connecting pipeline is configured to be closed via the second valve; A portion of the first pipeline connecting the refrigerant line to the third expansion valve is configured to be closed; Configure the first pipeline of the remaining portion connecting the third expansion valve to the flash tank to be connected; The second pipeline is configured to be connected; The third pipeline is configured to be connected via a fourth expansion valve; The first connecting pipeline is configured to be connected via the second expansion valve; The second connecting pipeline is configured to be connected via the fourth expansion valve; The third connecting pipeline is configured to be shut off via the second expansion valve; The fourth connecting pipeline is configured to be connected via the third expansion valve; The fifth connecting line is configured to be closed via the fourth expansion valve; The first expansion valve is configured to expand the refrigerant introduced from the flash tank through the second connecting line and a portion of the refrigerant line, and the first expansion valve is configured to supply the refrigerant expanded by the first expansion valve to the evaporator. The second expansion valve is configured to expand the refrigerant introduced through the second connecting line, a portion of the refrigerant line and the first connecting line, and the second expansion valve is configured to supply the refrigerant expanded by the second expansion valve to the quencher. The third expansion valve is configured to expand the refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the fourth connecting line, and the third expansion valve is configured to supply the refrigerant expanded by the third expansion valve to the first line. The fourth expansion valve is configured to allow refrigerant supplied from the flash tank through the third line to flow into the second connecting line without causing it to expand; The flash tank is configured to supply gaseous refrigerant from the refrigerant to the compressor via a connected second pipeline.

9. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is operated in the vehicle's interior heating mode to recover waste heat from electrical components: A portion of the refrigerant pipeline, whose first end is connected to the heat exchanger, is configured to be closed via a first valve; The portion of the refrigerant pipeline connecting the first end of the first connecting pipeline to the compressor is configured to be connected; A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator is configured to be closed via the first expansion valve; A portion of the refrigerant line connecting the evaporator to the first end of the first connecting line is configured to be closed; A portion of the refrigerant line connecting the heat exchanger to the first end of the second connecting line is configured to be closed via the second valve; The first pipeline is configured to be connected via a third expansion valve; The second pipeline is configured to be connected; The third pipeline is configured to be connected via a fourth expansion valve; The first connecting pipeline is configured to be connected via the second expansion valve; The second connecting pipeline is configured to be connected via the fourth expansion valve; The third connecting pipeline is configured to be shut off via the second expansion valve; The fourth connecting line is configured to be closed via the third expansion valve; The fifth connecting line is configured to be closed via the fourth expansion valve; The first expansion valve is configured to stop. The second expansion valve is configured to expand the refrigerant introduced from the flash tank through the second connecting line, a portion of the refrigerant line and the first connecting line, and the second expansion valve is configured to supply the refrigerant expanded by the second expansion valve to the quencher. The third expansion valve is configured to expand the refrigerant supplied from the internal condenser, and the third expansion valve is configured to supply the refrigerant expanded by the third expansion valve to the flash tank through the first line. The fourth expansion valve is configured to allow refrigerant supplied from the flash tank through the third line to flow into the second connecting line without causing it to expand; The flash tank is configured to supply gaseous refrigerant from the refrigerant to the compressor via a connected second pipeline.

10. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is operated in the vehicle's interior heating mode and ambient air heat is recovered: A portion of the refrigerant pipeline connecting the first end of the first pipeline to the second end of the fifth connecting pipeline is configured to be closed via the first valve; A portion of the refrigerant line connecting the heat exchanger to the second end of the first connecting line is configured to be connected via a second valve; A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator is configured to be closed via the first expansion valve; Configure a portion of the refrigerant line connecting the evaporator to the second end of the third connecting line to be closed; Configure a portion of the refrigerant pipeline that connects the second end of the third connecting pipeline to the compressor to be in operation; The first pipeline is configured to be connected via a third expansion valve; The second pipeline is configured to be connected; The third pipeline is configured to be connected via a fourth expansion valve; A portion of the first connecting line that connects the refrigerant line to the second expansion valve is configured to be connected via the second expansion valve; The first connection line connecting the refrigerant line to the compressor to the remaining part of the quencher is configured to be closed via the second expansion valve; The second connecting pipeline is configured to be shut off via the fourth expansion valve; The third connecting pipeline is configured to be connected via the second expansion valve; The fourth connecting line is configured to be closed via the third expansion valve; The fifth connecting pipeline is configured to be connected via the fourth expansion valve; The first expansion valve is configured to stop. The second expansion valve is configured to allow refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the first connecting line to flow into the third connecting line without causing it to expand. The third expansion valve is configured to expand the refrigerant supplied from the internal condenser, and the third expansion valve is configured to supply the refrigerant expanded by the third expansion valve to the flash tank through the first line. The fourth expansion valve is configured to expand the refrigerant supplied from the flash tank through the third line, and the fourth expansion valve is configured to allow the refrigerant expanded by the fourth expansion valve to flow into the fifth connecting line. The flash tank is configured to supply gaseous refrigerant from the refrigerant to the compressor via a connected second pipeline.

11. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is operated in the vehicle's interior heating mode, and waste heat from electrical components and ambient air heat is recovered together: A portion of the refrigerant pipeline connecting the first end of the first pipeline to the second end of the fifth connecting pipeline is configured to be closed via the first valve; A portion of the refrigerant line connecting the heat exchanger to the second end of the first connecting line is configured to be connected via a second valve; A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator is configured to be closed via the first expansion valve; A portion of the refrigerant line connecting the evaporator to the first end of the first connecting line is configured to be closed; The portion of the refrigerant pipeline connecting the first end of the first connecting pipeline to the compressor is configured to be connected; The first pipeline is configured to be connected via a third expansion valve; The second pipeline is configured to be connected; The third pipeline is configured to be connected via a fourth expansion valve; The first connecting pipeline is configured to be connected via the second expansion valve; The second connecting pipeline is configured to be shut off via the fourth expansion valve; The third connecting pipeline is configured to be shut off via the second expansion valve; The fourth connecting line is configured to be closed via the third expansion valve; The fifth connecting pipeline is configured to be connected via the fourth expansion valve; The first expansion valve is configured to stop. The second expansion valve is configured to supply refrigerant introduced from the heat exchanger through a portion of the refrigerant line and the first connecting line to the quencher without causing it to expand. The third expansion valve is configured to expand the refrigerant supplied from the internal condenser, and the third expansion valve is configured to supply the refrigerant expanded by the third expansion valve to the flash tank through the first line. The fourth expansion valve is configured to expand the refrigerant supplied from the flash tank through the third line, and the fourth expansion valve is configured to allow the refrigerant expanded by the fourth expansion valve to flow into the fifth connecting line. The flash tank is configured to supply gaseous refrigerant from the refrigerant to the compressor via a connected second pipeline.

12. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is running in the vehicle's interior heating and dehumidification mode: Configure a portion of the refrigerant line connecting the evaporator and the compressor to be connected; A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator is configured to be connected via the first expansion valve; A portion of the refrigerant pipeline, whose first end is connected to the heat exchanger, is configured to be closed via a first valve; A portion of the refrigerant line connecting the heat exchanger to the first end of the second connecting line is configured to be closed via the second valve; The first pipeline is configured to be connected via a third expansion valve; The second pipeline is configured to be connected; The third pipeline is configured to be connected via a fourth expansion valve; The first connecting pipeline is configured to be connected via the second expansion valve; The second connecting pipeline is configured to be connected via the fourth expansion valve; The third connecting pipeline is configured to be shut off via the second expansion valve; The fourth connecting line is configured to be closed via the third expansion valve; The fifth connecting line is configured to be closed via the fourth expansion valve; The first expansion valve is configured to expand the refrigerant introduced from the flash tank through the second connecting line and a portion of the refrigerant line, and the first expansion valve is configured to supply the refrigerant expanded by the first expansion valve to the evaporator. The second expansion valve is configured to expand the refrigerant introduced through the first connecting line, and the second expansion valve is configured to supply the refrigerant expanded by the second expansion valve to the quencher. The third expansion valve is configured to expand the refrigerant supplied from the internal condenser, and the third expansion valve is configured to supply the refrigerant expanded by the third expansion valve to the flash tank through the first line. The fourth expansion valve is configured to allow refrigerant supplied from the flash tank through the third line to flow into the second connecting line without causing it to expand; The flash tank is configured to supply gaseous refrigerant from the refrigerant to the compressor via a connected second pipeline.

13. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is not running in the vehicle's interior heating and dehumidification mode: Configure a portion of the refrigerant line connecting the evaporator and the compressor to be connected; A portion of the refrigerant line connecting the second end of the first connecting line to the evaporator is configured to be connected via the first expansion valve; A portion of the refrigerant pipeline, whose first end is connected to the heat exchanger, is configured to be closed via a first valve; A portion of the refrigerant line connecting the heat exchanger to the first end of the fourth connecting line is configured to be closed; A portion of the refrigerant pipeline whose first end is connected to the first expansion valve is configured to be connected via the second valve; A portion of the first pipeline is configured to be connected via a third expansion valve, thereby enabling the internal condenser to be connected to the third expansion valve; The first pipeline connecting the remaining portion of the flash tank to the third expansion valve is configured to be closed via the third expansion valve; The second pipeline is configured to be closed; The third pipeline is configured to be shut off via a fourth expansion valve; The first connecting pipeline is configured to be connected via the second expansion valve; The second connecting pipeline is configured to be shut off via the fourth expansion valve; The third connecting pipeline is configured to be shut off via the second expansion valve; The fourth connecting pipeline is configured to be connected via the third expansion valve; The fifth connecting line is configured to be closed via the fourth expansion valve; The first expansion valve is configured to expand the refrigerant introduced from the internal condenser through a portion of the first line, the fourth connecting line and a portion of the refrigerant line, and the first expansion valve is configured to supply the refrigerant expanded by the first expansion valve to the evaporator. The second expansion valve is configured to expand the refrigerant introduced through the first connecting line, and the second expansion valve is configured to supply the refrigerant expanded by the second expansion valve to the quencher. The third expansion valve is configured to allow refrigerant supplied from the internal condenser to flow into the fourth connecting line without causing it to expand; This stops the operation of the flash tank and the fourth expansion valve.

14. The vehicle heat pump system according to claim 7, wherein, When the gas injection device is in operation, the fifth connection line is configured to be connected via the fourth expansion valve when recovering ambient air heat in the vehicle interior heating mode, or when recovering waste heat from electrical components and ambient air heat together in the vehicle interior heating mode.

15. The vehicle heat pump system according to claim 2, wherein, The second expansion valve, the third expansion valve, and the fourth expansion valve are three-way electronic expansion valves, which are configured to selectively expand the refrigerant while controlling the flow direction of the refrigerant.

16. The vehicle heat pump system according to claim 2, wherein, When the gas injection device is operating in the vehicle's interior cooling mode, or when the gas injection device is not operating in the vehicle's interior heating and dehumidification mode, the fourth connection line is configured to be connected via the operation of the third expansion valve.

17. The vehicle heat pump system of claim 1, further comprising an auxiliary heat exchanger connected to a second connecting line and a refrigerant line connecting an evaporator and a compressor, the auxiliary heat exchanger being configured to allow heat exchange between refrigerant supplied through the second connecting line and refrigerant supplied from the evaporator or quencher.

18. The vehicle heat pump system according to claim 1, wherein, When ambient air heat is recovered in the vehicle's interior heating mode, the third connection line is configured to be selectively connected via the second expansion valve.

19. The vehicle heat pump system of claim 1, further comprising a cooling device including electrical components and a battery module through which coolant circulates; in, The quencher is connected to the electrical components via a first coolant pipeline through which coolant circulates, and the quencher is connected to the battery module via a second coolant pipeline through which coolant circulates.

20. The vehicle heat pump system according to claim 19, wherein: When recovering waste heat from electrical components in the vehicle's interior heating mode, the first coolant line is configured to be switched on to connect the quencher and the electrical components. When the battery module is being cooled in the vehicle's cooling mode, or when the waste heat from the battery module is being recovered in the vehicle's interior heating mode, the second coolant line is configured to connect the quencher and the battery module.

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