KR20180096353A - Heat pump system for vehicle - Google Patents

Heat pump system for vehicle Download PDF

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Publication number
KR20180096353A
KR20180096353A KR1020170022958A KR20170022958A KR20180096353A KR 20180096353 A KR20180096353 A KR 20180096353A KR 1020170022958 A KR1020170022958 A KR 1020170022958A KR 20170022958 A KR20170022958 A KR 20170022958A KR 20180096353 A KR20180096353 A KR 20180096353A
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KR
South Korea
Prior art keywords
cooling water
line
refrigerant
water line
compressor
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Application number
KR1020170022958A
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Korean (ko)
Inventor
이승호
이재민
윤서준
Original Assignee
한온시스템 주식회사
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Application filed by 한온시스템 주식회사 filed Critical 한온시스템 주식회사
Priority to KR1020170022958A priority Critical patent/KR20180096353A/en
Priority to PCT/KR2018/002038 priority patent/WO2018155871A1/en
Priority to CN201880004501.3A priority patent/CN109982877B/en
Priority to US16/328,819 priority patent/US10926606B2/en
Publication of KR20180096353A publication Critical patent/KR20180096353A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00921—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3228—Cooling devices using compression characterised by refrigerant circuit configurations
    • B60H1/32284—Cooling devices using compression characterised by refrigerant circuit configurations comprising two or more secondary circuits, e.g. at evaporator and condenser side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00885—Controlling the flow of heating or cooling liquid, e.g. valves or pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H1/00899—Controlling the flow of liquid in a heat pump system
    • B60H1/00914—Controlling the flow of liquid in a heat pump system where the flow direction of the refrigerant does not change and there is a bypass of the condenser
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • B60H1/08—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3213—Control means therefor for increasing the efficiency in a vehicle heat pump
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3227—Cooling devices using compression characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/323—Cooling devices using compression characterised by comprising auxiliary or multiple systems, e.g. plurality of evaporators, or by involving auxiliary cooling devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B27/00—Machines, plants or systems, using particular sources of energy
    • F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F25B41/046—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B5/00—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity
    • F25B5/02—Compression machines, plants or systems, with several evaporator circuits, e.g. for varying refrigerating capacity arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H2001/00307—Component temperature regulation using a liquid flow
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00928—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising a secondary circuit
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
    • B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
    • B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
    • B60H2001/00949—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices comprising additional heating/cooling sources, e.g. second evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

In a heat pump system using a water-cooled condenser, disclosed is an automotive heat pump system in which a heat generating unit and a heat absorbing unit are separated so that engine waste heat can be used independently as a heat source, and a high temperature cooling water loop is separately separated to reduce the length of a loop. The automotive heat pump system comprises: a first cooling water line circulating cooling water by connecting an automotive drive and a chiller; a second cooling water line provided in an air conditioning case and connected to a heater core used for heating a passenger compartment and the water-cooled condenser to circulate the cooling water; and a valve disposed between the first cooling water line and the second cooling water line. The first cooling water line and the second cooling water line operate separately when the valve is arranged in a first manner and the first cooling water line and the second cooling water line are connected in series when the valve is arranged in a second manner.

Description

차량용 히트펌프 시스템{HEAT PUMP SYSTEM FOR VEHICLE}[0001] HEAT PUMP SYSTEM FOR VEHICLE [0002]

본 발명은 차량용 히트펌프 시스템에 관한 것으로서, 더욱 상세하게는 하나의 냉매사이클을 이용하여 냉매의 유동방향을 전환함으로써 냉방과 난방을 선택적으로 수행할 수 있는 차량용 히트펌프 시스템에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a heat pump system for a vehicle, and more particularly, to a heat pump system for a vehicle that can selectively perform cooling and heating by switching the direction of flow of refrigerant using one refrigerant cycle.

일반적으로, 차량용 공조장치는 차량의 실내를 냉방하기 위한 냉방시스템과, 차량의 실내를 난방하기 위한 난방시스템을 포함하여 이루어진다. 냉방시스템은 냉매사이클의 증발기 측에서 증발기의 외부를 거치는 공기를 증발기의 내부에서 유동되는 냉매와 열교환시켜 냉기로 바꾸어 차량 실내를 냉방한다. 아울러, 난방시스템은 냉각수 사이클의 히터코어 측에서 히터코어 외부를 거치는 공기를 히터코어의 내부에서 유동되는 냉각수와 열교환시켜 온기로 바꾸어 차량 실내를 난방하도록 구성된다.2. Description of the Related Art Generally, an air conditioner for a vehicle includes a cooling system for cooling the interior of a vehicle and a heating system for heating the interior of the vehicle. In the cooling system, air passing through the outside of the evaporator at the evaporator side of the refrigerant cycle is exchanged with the refrigerant flowing inside the evaporator, and the refrigerant is cooled to cool the inside of the vehicle. In addition, the heating system is configured to heat the interior of the vehicle by changing the air passing through the heater core from the heater core side of the cooling water cycle to the heat exchanged with the cooling water flowing inside the heater core.

한편, 전술한 차량용 공조장치와는 다른 것으로, 하나의 냉매사이클을 이용하여 냉매의 유동방향을 전환함으로써, 냉방과 난방을 선택적으로 수행할 수 있는 히트펌프 시스템이 적용되고 있다. 이러한 히트펌프 시스템은 공조케이스 내부에 설치되어 차량 실내로 송풍되는 공기와 열교환하기 위한 실내 열교환기와, 공조케이스 외부에서 열교환하기 위한 실외 열교환기 및 냉매의 유동방향을 전환할 수 있는 방향조절밸브 등을 구비한다. 따라서, 방향조절밸브에 의한 냉매의 유동방향에 따라 냉방 모드가 가동될 경우에 실내 열교환기가 냉방용 열교환기의 기능을 수행하며, 난방 모드가 가동될 경우에는 실내 열교환기가 난방용 열교환기의 기능을 수행하게 된다.On the other hand, a heat pump system which can selectively perform cooling and heating by switching the flow direction of refrigerant by using one refrigerant cycle is applied, unlike the above-described vehicle air conditioner. The heat pump system includes an indoor heat exchanger installed inside the air conditioner case for exchanging heat with air blown into the passenger compartment, an outdoor heat exchanger for exchanging heat outside the air conditioner case, and a direction control valve for switching the flow direction of the refrigerant Respectively. Therefore, when the cooling mode is operated according to the flow direction of the refrigerant by the direction control valve, the indoor heat exchanger functions as a cooling heat exchanger. When the heating mode is activated, the indoor heat exchanger functions as a heating heat exchanger .

한편, 엔진(내연기관)과 전기모터로 구동되는 하이브리드 차량에서는 실내 난방을 위해 엔진 폐열(냉각수)을 이용하여 난방열원으로 사용하고 있다. 즉, 엔진으로 구동시에는 엔진 폐열이 충분하여 난방시 기존 차량과 동일하게 공조장치를 사용할 수 있으나, 전기모터로 구동되는 조건에서는 엔진이 오프된 상태이더라도 엔진 냉각수에 남아있는 잔열을 이용하여 난방 열원으로 사용하게 된다. 전기모터로 구동되는 조건의 경우, 외기온도가 낮은 조건(약 0℃ 이하)에서는 엔진 냉각수의 잔열이 부족하여 엔진 냉각수가 일정온도 이하가 되면 전기모터로 구동할 수 있음에도 불구하고 난방 열원을 확보하기 위해 엔진이 강제로 작동하도록 되어 있어 하이브리드 차량의 연비가 저하된다.On the other hand, in a hybrid vehicle driven by an engine (internal combustion engine) and an electric motor, engine waste heat (cooling water) is used as a heating heat source for indoor heating. That is, when the engine is driven, the waste heat of the engine is sufficient, so that the air conditioner can be used in the same manner as the existing vehicle in heating. However, even if the engine is turned off under the condition driven by the electric motor, . In the case of an electric motor driven condition, when the outside temperature is low (below about 0 ℃), the engine cooling water becomes insufficient and the engine cooling water becomes below a certain temperature, The engine is forcibly operated and the fuel efficiency of the hybrid vehicle is lowered.

선 출원된 대한민국 공개특허공보 제10-2014-0126846호(2014.11.03)에는 에어컨 모드 및 히트펌프 모드시 공조케이스 내의 증발기를 공용으로 사용하여 냉방 및 난방에 이용한 차량용 히트펌프 시스템이 개시된바 있다. 도 1은 종래의 차량용 히트펌프 시스템의 에어컨 모드를 도시한 것이고, 도 2는 종래의 차량용 히트펌프 시스템의 히트펌프 모드를 도시한 것이다.Korean Utility Model Publication No. 10-2014-0126846 (Apr. 31, 2014) discloses a heat pump system for a vehicle in which an evaporator in an air conditioner case is commonly used for cooling and heating in an air conditioner mode and a heat pump mode. FIG. 1 shows an air conditioning mode of a conventional vehicle heat pump system, and FIG. 2 shows a heat pump mode of a conventional vehicle heat pump system.

도 1 및 도 2에 도시된 바와 같이, 종래의 차량용 히트펌프 시스템은 하이브리드 차량에 적용되는 것이 바람직한 것으로서, 압축기(100)와, 증발기(110)와, 실외 열교환기(130)와, 팽창수단(120)과, 칠러(140)와, 제1 냉매순환라인(R1)과, 제2 냉매순환라인(R2)을 구비한다.1 and 2, a conventional vehicular heat pump system is preferably applied to a hybrid vehicle, and includes a compressor 100, an evaporator 110, an outdoor heat exchanger 130, an expansion means 120, a chiller 140, a first refrigerant circulation line R1, and a second refrigerant circulation line R2.

제1 냉매순환라인(R1)은 에어컨 모드시 압축기(100)에서 배출된 냉매가 실외 열교환기(130), 팽창수단(120), 증발기(110), 압축기(100)를 순환하도록 냉매 라인을 구성한다. 제2 냉매순환라인(R2)은 히트펌프 모드시 압축기(100)에서 배출된 냉매가 증발기(110), 팽창수단(120), 칠러(140), 압축기(100)를 순환하도록 냉매 라인을 구성한다.The first refrigerant circulation line R1 constitutes a refrigerant line so that the refrigerant discharged from the compressor 100 in the air conditioning mode circulates through the outdoor heat exchanger 130, the expansion means 120, the evaporator 110 and the compressor 100 do. The second refrigerant circulation line R2 constitutes a refrigerant line in which the refrigerant discharged from the compressor 100 circulates through the evaporator 110, the expansion means 120, the chiller 140 and the compressor 100 in the heat pump mode .

제1 냉매순환라인(R1)과 제2 냉매순환라인(R2)은 일부 구간을 서로 공용으로 사용하도록 구성된다. 즉, 제1 냉매순환라인(R1)과 제2 냉매순환라인(R2)의 일부 구간이 일체로 형성되어 공용으로 사용되며, 제1,2 냉매순환라인(R1,R2)의 공용 구간(a,b)은 압축기(100)가 연결된 구간(a)과, 증발기(110) 및 팽창수단(120)이 연결된 구간(b)이다. 실외 열교환기(130)는 제1 냉매순환라인(R1)에 구비되고, 칠러(140)는 제2 냉매순환라인(R2)에 구비된다.The first refrigerant circulation line (R1) and the second refrigerant circulation line (R2) are configured to share a part of them in common. That is, a part of the first refrigerant circulation line R1 and the second refrigerant circulation line R2 are integrally formed and used in common, and the common sections a and b of the first and second refrigerant circulation lines R1 and R2, b is an interval a in which the compressor 100 is connected and a interval b in which the evaporator 110 and the expansion means 120 are connected. The outdoor heat exchanger 130 is provided in the first refrigerant circulation line R1 and the chiller 140 is provided in the second refrigerant circulation line R2.

압축기(100)는 냉매를 흡입하여 압축한 후 고온 고압의 기체 상태로 배출한다. 증발기(110)는 공조케이스(150)의 내부에 설치되어 공조케이스(150) 내를 유동하는 공기와 냉매를 열교환 시킨다. 증발기(110)는 에어컨 모드시 본래의 증발기(110) 역할을 하여 냉방역할을 수행하고, 히트펌프 모드시 응축기 역할을 하여 난방 역할을 수행한다.The compressor 100 sucks the refrigerant, compresses it, and discharges it to the high-temperature, high-pressure gaseous state. The evaporator 110 is installed inside the air conditioning case 150 to exchange heat between the air flowing in the air conditioning case 150 and the refrigerant. The evaporator 110 acts as a natural evaporator 110 in the air conditioner mode to perform a cooling function, and functions as a condenser in a heat pump mode to perform a heating function.

실외 열교환기(130)는 공조케이스(150)의 외부에 설치되어 외기와 냉매를 열교환 시킨다. 팽창수단(120)은 증발기(110)와 실외 열교환기(130)의 사이에 배치되어 냉매를 팽창시킨다. 공조케이스(150)의 내부에는 차량 엔진(161)과 냉각수순환라인(W)을 통해 연결되는 히터코어(160)가 구비된다. 냉각수순환라인(W)에는 엔진(161)의 냉각수를 히터코어(160) 측으로 순환시키는 워터펌프(162)가 구비된다.The outdoor heat exchanger (130) is installed outside the air conditioning case (150) to exchange heat between the outdoor air and the refrigerant. The expansion means (120) is disposed between the evaporator (110) and the outdoor heat exchanger (130) to expand the refrigerant. The air conditioning case 150 is provided therein with a heater core 160 connected to the vehicle engine 161 through a cooling water circulation line W. The cooling water circulation line W is provided with a water pump 162 for circulating the cooling water of the engine 161 to the heater core 160 side.

증발기(110)와 히터코어(160)의 사이에는 히터코어(160)를 바이패스하는 공기의 양과 통과하는 공기의 양을 조절하는 온도조절도어(151)가 구비된다. 칠러(140)의 입구측 제2 냉매순환라인(R2)에는 에어컨 모드시 폐쇄되고 히트펌프 모드시 개방되는 온오프 밸브(183)가 구비된다. 압축기(100)의 입구측에는 압축기(100)로 유입되는 냉매 중에서 액상 냉매와 기상 냉매를 분리하여 기상 냉매만 공급하는 어큐뮬레이터(170)가 구비된다.Between the evaporator 110 and the heater core 160, there is provided a temperature control door 151 for controlling the amount of air passing through the heater core 160 and the amount of air passing through the heater core 160. The second refrigerant circulation line (R2) on the inlet side of the chiller (140) is provided with an on-off valve (183) which is closed in the air conditioning mode and opened in the heat pump mode. At the inlet side of the compressor 100, an accumulator 170 separating the liquid refrigerant and the gaseous refrigerant from the refrigerant flowing into the compressor 100 and supplying only the gaseous refrigerant is provided.

압축기(100)의 출구측에서 제1,2 냉매순환라인(R1,R2)이 분기되는 지점에는 에어컨 모드 또는 히트펌프 모드에 따라 압축기(100)에서 배출된 냉매가 제1 냉매순환라인(R1) 또는 제2 냉매순환라인(R2) 측으로 흐르도록 냉매 흐름 방향을 전환하는 제1 방향전환밸브(181)가 구비된다.The refrigerant discharged from the compressor 100 is discharged to the first refrigerant circulation line R1 at the point where the first and second refrigerant circulation lines R1 and R2 are branched at the outlet side of the compressor 100 according to the air conditioning mode or the heat pump mode, Or a first direction switching valve 181 for switching the refrigerant flow direction so as to flow to the second refrigerant circulation line R2 side.

아울러, 압축기(100)가 연결된 구간(a)과 증발기(110) 및 팽창수단(120)이 연결된 구간(b) 사이를 연결하는 위치의 증발기(110) 일측에서 제1,2 냉매순환라인(R1,R2)이 분지되는 지점에는, 에어컨 모드시 증발기(110)에서 배출된 냉매가 제1 냉매순환라인(R1)을 따라 압축기(100) 측으로 흐르도록 냉매 흐름방향을 전환하고 히트펌프 모드시에는 압축기(100)에서 배출되어 제2 냉매순환라인(R2)을 유동하는 냉매가 증발기(110) 측으로 흐르도록 냉매 흐름 방향을 전환하는 양방향 삼방밸브 구조의 제2 방향전환밸브(182)가 구비된다.The first and second refrigerant circulation lines R1 and R2 are connected to each other at a position where the compressor 100 is connected to the evaporator 110 and the evaporator 110 and the expansion unit 120 are connected to each other, The refrigerant flow direction is switched so that the refrigerant discharged from the evaporator 110 flows toward the compressor 100 along the first refrigerant circulation line R1 at the point where the refrigerant is branched, Way switching valve 182 having a bidirectional three-way valve structure for switching the direction of the refrigerant flow so that the refrigerant flowing out of the first refrigerant circulation line (R2) flows to the evaporator 110 side.

도 1을 참조하면, 엔진 오프(OFF) 상태에서 에어컨 모드시, 제1 방향전환밸브(181)와 제2 방향전환밸브(182) 및 온오프 밸브(183)의 제어에 의해 제1 냉매순환라인(R1)을 따라 냉매가 순환된다. 엔진(161) 오프(OFF) 상태에서는 워터펌프(162)가 정지되어 히터코어(160) 및 칠러(140) 측으로 냉각수가 순환하지 않는다. 최대 냉방시 공조케이스(150) 내의 온도조절도어(151)는 히터코어(160)를 통과하는 통로를 폐쇄하도록 작동하여, 블로어에 의해 공조케이스(150) 내로 송풍된 공기가 증발기(110)를 통과하면서 냉각된 후 히터코어(160)를 바이패스 하여 차실내로 공급됨으로써 차실내가 냉방된다.Referring to FIG. 1, in the air conditioner mode in the engine off state, the first refrigerant circulation line 181, the second direction switching valve 182, and the on-off valve 183 are controlled by the first direction switching valve 181, the second direction switching valve 182, The refrigerant is circulated along the refrigerant line R1. The water pump 162 is stopped and the cooling water is not circulated to the heater core 160 and the chiller 140 side in the state where the engine 161 is off. The temperature control door 151 in the air conditioning case 150 closes the passage through the heater core 160 so that the air blown into the air conditioning case 150 by the blower passes through the evaporator 110 The heater core 160 is bypassed and supplied to the interior of the vehicle, thereby cooling the interior of the vehicle.

압축기(100)에서 압축된 후 배출되는 고온 고압의 기상 냉매는 제1 방향전환밸브(181)를 거쳐 실외 열교환기(130)로 공급된다. 실외 열교환기(130)로 공급된 냉매는 외기와 열교환하여 응축되며 기상 냉매가 액상 냉매로 바뀌게 된다. 계속해서, 실외 열교환기(130)를 통과한 냉매는 팽창수단(120)을 통과하는 과정에서 감압 팽창되어 저온 저압의 액상냉매가 된 후 증발기(110)로 유입된다. 증발기(110)로 유입된 냉매는 블로어를 통해 공조케이스(150) 내부로 송풍되는 공기와 열교환하여 증발함과 동시에 냉매의 증발 잠열에 의한 흡열 작용으로 공기를 냉각하게 되며, 이처럼 냉각된 공기가 차량 실내로 공급되어 냉방이 이루어진다. 이후, 증발기(110)에서 배출된 냉매는 제2방향전환밸브(182)를 거쳐 압축기(100)로 유입되면서 전술한 바와 같은 사이클을 반복한다.The gaseous refrigerant of high temperature and high pressure discharged after being compressed by the compressor 100 is supplied to the outdoor heat exchanger 130 through the first direction switching valve 181. The refrigerant supplied to the outdoor heat exchanger 130 is heat-exchanged with the outside air to be condensed, and the gaseous refrigerant is converted into the liquid refrigerant. Subsequently, the refrigerant having passed through the outdoor heat exchanger 130 is expanded and decompressed in the course of passing through the expansion means 120, and is converted into low-temperature low-pressure liquid refrigerant, and then flows into the evaporator 110. The refrigerant flowing into the evaporator 110 is heat-exchanged with the air blown into the air conditioning case 150 through the blower to evaporate, and at the same time, the air is cooled by an endothermic effect due to the latent heat of evaporation of the refrigerant. And is supplied to the room for cooling. Then, the refrigerant discharged from the evaporator 110 flows into the compressor 100 through the second direction switching valve 182, and repeats the above-described cycle.

도 2를 참조하면, 엔진 오프(OFF) 상태에서 히트펌프 모드시, 제1 방향전환밸브(181)와 제2 방향전환밸브(182) 및 온오프 밸브(183)의 제어에 의해 제2 냉매순환라인(R2)을 따라 냉매가 순환된다. 엔진(161) 오프(OFF) 상태에서는 히터코어(160) 및 칠러(140) 측으로 냉각수가 순환하지 않으나, 워터펌프(162)를 가동할 경우 냉각수를 순환시킬 수도 있다. 아울러, 엔진(161) 오프(OFF) 상태에서는 엔진(161) 냉각수에 남아 있는 잔열을 이용하여 난방 열원으로 사용하게 된다. 최대 난방시 공조케이스(150) 내의 온도조절도어(151)는 히터코어(160)를 바이패스하는 통로를 폐쇄하도록 작동하여, 블로어에 의해 공조케이스(150) 내로 송풍된 공기가 증발기(110)(난방 역할)를 통과하면서 온풍으로 바뀌어 차실내로 공급됨으로써 차실내가 난방된다.2, when the engine is in the OFF state and the heat pump mode is selected, the first and second directional control valves 181, 182 and 183 control the second refrigerant circulation The refrigerant is circulated along the line R2. In the OFF state of the engine 161, the cooling water is not circulated to the heater core 160 and the chiller 140, but the cooling water may be circulated when the water pump 162 is operated. In addition, when the engine 161 is in the OFF state, the residual heat remaining in the cooling water of the engine 161 is used as a heating heat source. The temperature control door 151 in the air conditioning case 150 is operated to close the passage bypassing the heater core 160 so that the air blown into the air conditioning case 150 by the blower is supplied to the evaporator 110 Heating function) and is supplied to the interior of the vehicle, thereby heating the interior of the vehicle.

압축기(100)에서 압축된 후 배출되는 고온 고압의 기상 냉매는 제1 방향전환밸브(181) 및 제2 방향전환밸브(182)를 거쳐 증발기(110)로 공급된다. 증발기(110)로 공급된 고온 고압의 기상 냉매는 공조케이스(150) 내를 유동하는 공기와 열교환하여 응축됨과 동시에 공기를 가열하게 되며, 이처럼 가열된 공기가 차량 실내로 공급되어 난방이 이루어진다. 계속해서, 증발기(110)를 통과한 냉매는 팽창수단(120)을 통과하는 과정에서 감압 팽창되어 저온 저압의 액상냉매가 된 후, 칠러(140)로 유입된다. 칠러(140)로 유입된 냉매는 엔진(161) 냉각수(엔진 폐열)와 열교환하면서 증발하게 된다. 이후, 증발기(110)에서 배출된 냉매는 압축기(100)로 유입되면서 전술한 바와 같은 사이클을 반복한다.The gaseous refrigerant of high temperature and high pressure discharged after being compressed by the compressor 100 is supplied to the evaporator 110 through the first direction switching valve 181 and the second direction switching valve 182. The high-temperature, high-pressure gaseous refrigerant supplied to the evaporator 110 is heat-exchanged with air flowing in the air conditioning case 150 to be condensed and simultaneously heats the air, and the heated air is supplied to the vehicle interior to be heated. Subsequently, the refrigerant having passed through the evaporator 110 is expanded and decompressed in the process of passing through the expansion means 120 to become a low-temperature and low-pressure liquid-phase refrigerant, and then flows into the chiller 140. The refrigerant flowing into the chiller 140 evaporates while exchanging heat with the cooling water (engine waste heat) of the engine 161. Then, the refrigerant discharged from the evaporator 110 flows into the compressor 100, and repeats the cycle as described above.

종래의 차량용 히트펌프 시스템은 엔진 냉각수 열원을 회수하여 실내 난방효과를 가지며, 증발기에서 냉매열을 방열하여 난방열로 사용한다. 아울러, 칠러를 통해 엔진의 폐열을 회수하여 냉매 기화 에너지로 사용한다. 한편, 발열부인 히터코어 및 흡열부인 칠러가 하나의 루프(Loop)에 구성된다.The conventional vehicle heat pump system recovers the engine cooling water heat source to have an indoor heating effect and uses the refrigerant heat as a heating heat by radiating the refrigerant heat from the evaporator. In addition, the waste heat of the engine is recovered through the chiller and used as the refrigerant vaporization energy. On the other hand, the heater core, which is a heating part, and the chiller, which is a heat absorbing part, are constituted in one loop.

하지만, 종래의 차량용 히트펌프 시스템은 히트펌프를 작동시키는 경우 냉각수의 온도가 급격히 변하며, 냉각수 온도에 따라 증발기를 지난 따뜻한 공기가 히터코어를 흐르는 냉각수를 가열해주는 조건이 발생한다. 아울러, 종래의 차량용 히트펌프 시스템은 별도의 고압용 증발기가 요구되므로 생산에 별도 관리가 요구되고 생산 비용이 증가하는 문제점이 있다.However, in the conventional vehicle heat pump system, when the heat pump is operated, the temperature of the cooling water rapidly changes, and according to the cooling water temperature, there arises a condition that the warm air passing through the evaporator heats the cooling water flowing through the heater core. In addition, since a conventional heat pump system for a vehicle requires a separate high-pressure evaporator, separate management is required for production and the production cost is increased.

한편, 종래의 차량용 히트펌프 시스템은 고온 냉각수 라인의 루프가 길어 냉각수 호스에서 열손실이 발생함에 따라 외부로 손실되는 에너지가 많아지고, 압력 수두가 증가하여 충분한 유량 확보가 어려우며 이로 인해 난방 성능이 저하될 가능성이 있었다.On the other hand, in the conventional heat pump system for a vehicle, since the loop of the high-temperature coolant line is long, heat loss occurs in the coolant hose, energy to be lost to the outside is increased, pressure head is increased and it is difficult to secure sufficient flow rate, .

대한민국 공개특허공보 제10-2014-0126846호(2014.11.03)Korean Patent Publication No. 10-2014-0126846 (Apr. 31, 2014)

이와 같은 종래의 문제점을 해결하기 위하여, 본 발명에서는 수냉식 컨덴서를 사용하는 히트펌프 시스템에 있어서 발열부와 흡열부를 분리하여 엔진 폐열을 열원으로만 독립적으로 사용이 가능하고, 고온 냉각수 루프를 별도로 분리하여 루프의 길이를 축소시킨 차량용 히트펌프 시스템을 제공한다.In order to solve such a conventional problem, in the present invention, in a heat pump system using a water-cooled condenser, a heat generating portion and a heat absorbing portion are separated from each other so that engine waste heat can be used independently as a heat source, A vehicle heat pump system in which the length of a loop is reduced is provided.

본 발명에 따른 차량용 히트펌프 시스템은 냉매를 압축하여 배출하는 압축기; 공조케이스의 내부에 구비되어 공기와 냉매를 열교환시키는 증발기; 공조케이스의 외부에 설치되어 외기와 냉매를 열교환시키는 실외 열교환기; 공조케이스의 내부에 구비되어 공기와 냉각수를 열교환시키는 히터코어; 상기 증발기와 실외 열교환기의 사이에 구비되어 냉매를 팽창시키는 제1 팽창수단; 차량의 폐열과 냉매를 열교환시키는 칠러; 차량의 엔진과 칠러를 연결하여 냉각수를 순한하는 통로인 제1 냉각수라인; 상기 제1 냉각수라인에 연결되어 제1 냉각수라인을 선택적으로 통과하거나 바이패스하며, 상기 히터코어를 순환하는 제2 냉각수라인; 냉각수의 유동 방향으로 히터코어의 상류측 제2 냉각수라인에 구비되고, 압축기에서 배출된 냉매와 제2 냉각수라인을 흐르는 냉각수를 열교환시키는 수냉식 컨덴서; 냉방 모드 시, 상기 압축기에서 배출된 냉매가 실외 열교환기, 제1 팽창수단, 증발기, 압축기를 순환하도록 냉매라인을 연결 구성하는 제1 냉매순환라인; 및 난방 히트펌프 모드 시, 상기 압축기에서 배출된 냉매가 수냉식 컨덴서, 칠러, 압축기를 순환하도록 냉매라인을 연결 구성하는 제2 냉매순환라인을 포함한다.A vehicular heat pump system according to the present invention includes: a compressor for compressing and discharging a refrigerant; An evaporator provided inside the air conditioning case for exchanging heat between the air and the refrigerant; An outdoor heat exchanger installed outside the air conditioning case for exchanging heat between the outside air and the refrigerant; A heater core provided inside the air conditioning case for exchanging heat between air and cooling water; A first expansion means provided between the evaporator and the outdoor heat exchanger to expand the refrigerant; A chiller for exchanging heat between the waste heat of the vehicle and the refrigerant; A first cooling water line which is a passage through which the engine of the vehicle is connected to the chiller to cool the cooling water; A second cooling water line connected to the first cooling water line for selectively passing or bypassing the first cooling water line and circulating the heater core; A water-cooled condenser provided in the second cooling water line upstream of the heater core in the flow direction of the cooling water, for exchanging heat between the refrigerant discharged from the compressor and the cooling water flowing through the second cooling water line; A first refrigerant circulation line connecting the refrigerant line to the outdoor heat exchanger, the first expansion means, the evaporator, and the compressor so as to circulate the refrigerant discharged from the compressor in the cooling mode; And a second refrigerant circulation line connecting the refrigerant line to circulate the refrigerant discharged from the compressor to the water-cooled condenser, the chiller and the compressor in the heating heat pump mode.

상기에서, 제1 냉각수라인과 제2 냉각수라인을 연결시키는 4방향 밸브를 구비하며, 상기 4방향 밸브의 작동에 따라 히터코어를 통과한 냉각수가 칠러 및 엔진을 통과하거나 바이패스한다.In this case, the four-way valve connects the first cooling water line and the second cooling water line, and the cooling water passing through the heater core passes or passes through the chiller and the engine according to the operation of the four-way valve.

상기에서, 제2 냉매순환라인에는 수냉식 컨덴서와 칠러의 사이에 제2 팽창수단이 구비된다.In the second refrigerant circulation line, a second expansion means is provided between the water-cooled condenser and the chiller.

상기에서, 난방 냉각수 모드 시, 상기 압축기는 구동 정지되고, 상기 제2 냉각수라인은 제1 냉각수라인에 연결되어 냉각수가 수냉식 컨덴서, 히터코어, 칠러, 엔진, 수냉식 컨덴서를 순환한다.In the heating cooling water mode, the compressor is stopped and the second cooling water line is connected to the first cooling water line so that the cooling water circulates through the water-cooled condenser, the heater core, the chiller, the engine, and the water-cooled condenser.

상기에서, 난방 히트펌프 모드 시, 상기 압축기에서 배출된 냉매가 수냉식 컨덴서, 칠러, 압축기를 순환하고, 상기 제2 냉각수라인은 제1 냉각수라인을 바이패스하여 냉각수가 수냉식 컨덴서, 히터코어, 수냉식 컨덴서를 순환하며, 제1 냉각수라인의 냉각수는 엔진, 칠러, 엔진을 제2 냉각수라인에 대해 독립적으로 순환한다.In the heating heat pump mode, the refrigerant discharged from the compressor circulates through a water-cooled condenser, a chiller, and a compressor. The second cooling water line bypasses the first cooling water line so that the cooling water is circulated through the water-cooled condenser, And the cooling water of the first cooling water line circulates independently of the engine, the chiller, and the engine to the second cooling water line.

상기에서, 냉각수의 온도를 감지하는 냉각수온도 감지수단을 구비하고, 냉각수의 온도가 기준 온도보다 낮은 경우 상기 난방 히트펌프 모드를 수행하며, 냉각수의 온도가 기준 온도보다 높은 경우 상기 난방 냉각수 모드를 수행한다.In the above, the cooling water temperature sensing means for sensing the temperature of the cooling water is provided. When the temperature of the cooling water is lower than the reference temperature, the heating heat pump mode is performed. When the cooling water temperature is higher than the reference temperature, do.

상기에서, 제2 냉각수라인에는 냉각수를 가열시키는 가열수단이 구비된다.In the above, the second cooling water line is provided with a heating means for heating the cooling water.

상기에서, 제1 냉각수라인에는 냉각수를 순환시키는 제1 워터펌프가 구비되고, 상기 제2 냉각수라인에는 냉각수를 순환시키는 제2 워터펌프가 구비된다.In the above, the first cooling water line is provided with a first water pump for circulating cooling water, and the second cooling water line is provided with a second water pump for circulating cooling water.

상기에서, 압축기의 출구 측에서 제1,2 냉매순환라인이 분지되는 지점에, 냉방 모드 또는 난방 모드에 따라 압축기에서 배출된 냉매가 제1 냉매순환라인 또는 제2 냉매순환라인 측으로 흐르도록 냉매 흐름 방향을 전환하는 제1 방향전환밸브가 구비된다.The refrigerant discharged from the compressor is caused to flow to the first refrigerant circulation line or the second refrigerant circulation line side in accordance with the cooling mode or the heating mode at the point where the first and second refrigerant circulation lines are branched at the outlet side of the compressor, A first direction switching valve is provided for switching the direction.

상기에서, 수냉식 컨덴서의 상류측 제2 냉각수라인에서 분지되어 히터코어의 하류측 제2 냉각수라인에 연결되는 제3 냉각수라인이 구비된다.In the above, a third cooling water line branched from the second cooling water line on the upstream side of the water-cooled condenser and connected to the second cooling water line on the downstream side of the heater core is provided.

상기에서, 수냉식 컨덴서의 상류측에서 제2 냉각수라인과 제3 냉각수라인의 연결지점에 구비되는 제2 방향전환밸브 및 히터코어의 하류측에서 제2 냉각수라인과 제3 냉각수라인의 연결지점에 구비되는 제3 방향전환밸브를 포함한다.In the above, the second direction switching valve provided at the connection point between the second cooling water line and the third cooling water line on the upstream side of the water-cooled condenser and the connection point between the second cooling water line and the third cooling water line on the downstream side of the heater core And a third direction switching valve.

상기에서, 냉각수의 온도가 기준 온도보다 낮은 경우, 히터코어를 통과한 냉각수는 제3 방향전환밸브에 의해 제3 냉각수라인을 지나 제2 방향전환밸브에 의해 수냉식 컨덴서, 히터코어를 순환한다.When the temperature of the cooling water is lower than the reference temperature, the cooling water having passed through the heater core flows through the third cooling water line by the third direction switching valve and circulates through the water-cooled condenser and the heater core by the second direction switching valve.

상기에서, 냉각수의 온도가 기준 온도보다 높은 경우, 엔진을 통과한 냉각수는 제2 방향전환밸브에 의해 제3 냉각수라인을 바이패스하여 수냉식 컨덴서, 히터코어를 지난 후 제3 방향전환밸브에 의해 칠러, 엔진을 순환한다.When the temperature of the cooling water is higher than the reference temperature, the cooling water having passed through the engine bypasses the third cooling water line by the second direction switching valve, passes through the water-cooled condenser and the heater core, , And circulates the engine.

본 발명에 따른 차량용 히트펌프 시스템은 내연기관과 공용으로 사용이 가능하고, 발열부인 히터코어와 흡열부인 칠러를 서로 다른 냉각수라인으로 분리하여 구성함으로써 엔진 폐열을 열원으로만 독립적으로 사용이 가능하며, 냉각수를 안정적으로 제어 가능하다.The heat pump system for a vehicle according to the present invention can be used in common with an internal combustion engine. Since the heater core, which is a heat generating part, and the chiller, which is a heat absorbing part, are separated into different cooling water lines, engine waste heat can be used independently as a heat source, The cooling water can be stably controlled.

아울러, 외부로 손실되는 에너지를 저감시키고 동일 파워에서 흘릴 수 있는 냉각수 유량을 증대시킬 수 있어 난방 성능이 증대된다.In addition, the energy lost to the outside can be reduced, and the flow rate of the cooling water flowing at the same power can be increased, so that the heating performance is increased.

도 1은 종래의 차량용 히트펌프 시스템의 에어컨 모드를 도시한 것이고,
도 2는 종래의 차량용 히트펌프 시스템의 히트펌프 모드를 도시한 것이며,
도 3은 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템을 도시한 것이고,
도 4는 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 냉방 모드를 도시한 것이며,
도 5는 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 난방 히트펌프 모드를 도시한 것이고,
도 6은 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 난방 냉각수 모드를 도시한 것이며,
도 7은 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템을 도시한 것이고,
도 8은 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템의 난방 히트펌프 모드를 도시한 것이며,
도 9는 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템의 난방 냉각수 모드를 도시한 것이다.1 is a view showing an air conditioning mode of a conventional heat pump system for a vehicle,
2 shows a heat pump mode of a conventional vehicle heat pump system,
3 illustrates a heat pump system for a vehicle according to an embodiment of the present invention,
4 is a view showing a cooling mode of a vehicle heat pump system according to an embodiment of the present invention,
FIG. 5 illustrates a heating heat pump mode of a vehicle heat pump system according to an embodiment of the present invention,
6 shows a heating cooling water mode of a vehicle heat pump system according to an embodiment of the present invention,
7 shows a heat pump system for a vehicle according to another embodiment of the present invention,
8 shows a heating heat pump mode of a vehicle heat pump system according to another embodiment of the present invention,
9 shows a heating cooling water mode of a vehicle heat pump system according to another embodiment of the present invention.

이하 첨부된 도면에 따라서 차량용 히트펌프 시스템의 기술적 구성을 상세히 설명하면 다음과 같다.Hereinafter, the technical configuration of the vehicle heat pump system will be described in detail with reference to the accompanying drawings.

도 3은 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템을 도시한 것이다.3 shows a heat pump system for a vehicle according to an embodiment of the present invention.

차량용 히트펌프 시스템은 차량 구동품과 칠러(740)를 연결하여 냉각수를 순환하는 제1 냉각수라인(704)과, 공조케이스(750) 내부에 구비되어 차실내 난방에 사용되는 히터코어(760)와 수냉식 컨덴서(800)를 연결하여 냉각수가 순환하는 제2 냉각수라인 및 제1 냉각수라인(704)과 제2 냉각수라인 사이에 구비되는 밸브를 포함한다.The vehicle heat pump system includes a first cooling water line 704 for circulating cooling water by connecting a vehicle drive unit and a chiller 740, a heater core 760 provided inside the air conditioning case 750 and used for heating the interior of the vehicle, And a valve provided between the second cooling water line through which the cooling water circulates and the first cooling water line 704 and the second cooling water line by connecting the water-cooled condenser 800.

상기 밸브는 제1 방식으로 배열되는 경우 제1 냉각수라인(704)과 제2 냉각수라인은 별개로 작동하며, 밸브가 제2 방식으로 배열되는 경우 제1 냉각수라인(704)과 제2 냉각수라인이 직렬로 연결된다. 아울러, 압축기(700), 실외 열교환기(730), 제1 팽창수단(720) 및 증발기(710)의 차실내 공조를 위한 냉매 라인이 구성되고, 제1 냉각수라인(704)의 칠러(740)와 제2 냉각수라인의 수냉식 컨덴서(800)는 냉매 라인과 열교환 한다. 이 경우, 칠러(740)는 압축기(700) 유입 전 냉매와 열교환 하며, 수냉식 컨덴서(800)는 압축기(700) 토출 냉매와 열교환한다.The first cooling water line 704 and the second cooling water line are separately operated when the valve is arranged in the first manner and the first cooling water line 704 and the second cooling water line They are connected in series. A refrigerant line for air conditioning the passenger compartment of the compressor 700, the outdoor heat exchanger 730, the first expansion means 720 and the evaporator 710 is constituted, and the chiller 740 of the first cooling water line 704, And the water-cooled condenser 800 of the second cooling water line heat exchange with the refrigerant line. In this case, the chiller 740 performs heat exchange with the refrigerant before the compressor 700 is introduced, and the water-cooled condenser 800 exchanges heat with the refrigerant discharged from the compressor 700.

더욱 상세하게는, 도 3에 도시된 바와 같이, 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템은 하이브리드 차량에 적용되는 것으로서, 압축기(700)와, 증발기(710)와, 실외 열교환기(730)와, 히터코어(760)와, 제1 팽창수단(720)과, 칠러(740)와, 제1 냉각수라인(704)과, 제2 냉각수라인과, 수냉식 컨덴서(800)와, 제1 냉매순환라인(701) 및 제2 냉매순환라인(702)을 포함하여 이루어진다.3, the vehicular heat pump system according to an embodiment of the present invention is applied to a hybrid vehicle, and includes a compressor 700, an evaporator 710, an outdoor heat exchanger 730 A first cooling water line 704, a second cooling water line, a water-cooled condenser 800, a first refrigerant line 710, a first refrigerant line 710, A circulation line 701 and a second refrigerant circulation line 702.

압축기(700)는 냉매를 흡입하여 압축한 후 고온 고압의 기체 상태로 배출한다. 증발기(710)는 공조케이스(750)의 내부에 구비되어 공조케이스(750) 내를 유동하는 공기와 냉매를 열교환 시킨다. 실외 열교환기(730)는 공조케이스(750)의 외부에 구비되어, 외기와 냉매를 열교환 시킨다. 히터코어(760)는 공조케이스(750)의 내부에 구비되어 공조케이스(750) 내를 유동하는 공기와 냉각수를 열교환 시킨다. 제1 팽창수단(720)은 증발기(710)와 실외 열교환기(730)의 사이에 배치되어 냉매를 팽창시킨다.The compressor 700 sucks the refrigerant, compresses it, and discharges it into a gas state of high temperature and high pressure. The evaporator 710 is provided inside the air conditioning case 750 to exchange heat between the air flowing in the air conditioning case 750 and the refrigerant. The outdoor heat exchanger 730 is provided outside the air conditioning case 750 to exchange heat between the outdoor air and the refrigerant. The heater core 760 is provided inside the air conditioning case 750 to exchange heat between the air flowing in the air conditioning case 750 and the cooling water. The first expansion means 720 is disposed between the evaporator 710 and the outdoor heat exchanger 730 to expand the refrigerant.

공조케이스(750)의 내부에는 증발기(710)와 히터코어(760)의 사이에, 히터코어(760)를 바이패스하는 공기의 양과 통과하는 공기의 양을 조절하는 온도조절도어(751)가 구비된다. 칠러(740)는 차량의 폐열과 냉매를 열교환 시킨다. 압축기(700)의 입구측에는 압축기(700)로 유입되는 냉매 중에서 액상 냉매와 기상 냉매를 분리하여 기상 냉매만 공급하는 어큐뮬레이터(770)가 구비된다.A temperature control door 751 is provided in the air conditioning case 750 between the evaporator 710 and the heater core 760 to regulate the amount of air passing through the heater core 760 and the amount of air passing therethrough do. The chiller 740 exchanges heat between the waste heat of the vehicle and the refrigerant. At the inlet side of the compressor 700, an accumulator 770 for separating the liquid refrigerant and the gaseous refrigerant from the refrigerant flowing into the compressor 700 and supplying only the gaseous refrigerant is provided.

제1 냉각수라인(704)은 차량의 엔진(761)과 칠러(740)를 연결하여 냉각수를 순환시키는 통로이다.The first cooling water line 704 connects the engine 761 of the vehicle with the chiller 740 to circulate the cooling water.

제2 냉각수라인(703,705)은 설명의 편의를 위해 도면부호를 703과 705로 구분하여 도시하였으나, 실질적으로 703과 705는 하나의 라인으로서, 후술할 4방향 밸브(706)의 상류측 라인을 703으로, 하류측 라인을 705로 구분한 것뿐이다. 제2 냉각수라인(703,705)은 제1 냉각수라인(704)에 연결되어 제1 냉각수라인(704)을 선택적으로 통과하거나 바이패스하며, 히터코어(760)를 순환한다.Although the second cooling water lines 703 and 705 are shown with reference numerals 703 and 705 for the sake of convenience of description, the first cooling water lines 703 and 705 substantially correspond to the first cooling water lines 703 and 705, , And the downstream line is divided into 705. [ The second cooling water lines 703 and 705 are connected to the first cooling water line 704 to selectively pass or bypass the first cooling water line 704 and circulate the heater core 760.

수냉식 컨덴서(800)는 냉각수의 유동 방향으로 히터코어(760)의 상류측 제2 냉각수라인에 구비된다. 수냉식 컨덴서(800)는 압축기(700)에서 배출된 냉매와 제2 냉각수라인을 흐르는 냉각수를 열교환 시킨다.The water-cooled condenser 800 is provided in the second cooling water line on the upstream side of the heater core 760 in the flow direction of the cooling water. The water-cooled condenser 800 exchanges heat between the refrigerant discharged from the compressor 700 and the cooling water flowing through the second cooling water line.

제1 냉매순환라인(701)은 냉방 모드 시, 압축기(700)에서 배출된 냉매가 실외 열교환기(730), 제1 팽창수단(720), 증발기(710), 압축기(700)를 순환하도록 냉매라인을 연결 구성한다. 제2 냉매순환라인(702)은 난방 히트펌프 모드 시, 압축기(700)에서 배출된 냉매가 수냉식 컨덴서(800), 칠러(740), 압축기(700)를 순환하도록 냉매라인을 연결 구성한다.The first refrigerant circulation line 701 is configured to circulate refrigerant discharged from the compressor 700 through the outdoor heat exchanger 730, the first expansion means 720, the evaporator 710, and the compressor 700, Connect the lines together. The second refrigerant circulation line 702 connects the refrigerant line to circulate the refrigerant discharged from the compressor 700 through the water-cooled condenser 800, the chiller 740, and the compressor 700 in the heat pump mode.

압축기(700)의 출구 측에서 제1,2 냉매순환라인(701,702)이 분지되는 지점에는 제1 방향전환밸브(781)가 구비된다. 제1 방향전환밸브(781)는 냉방 모드 또는 난방 모드에 따라 압축기(700)에서 배출된 냉매가 제1 냉매순환라인(701) 또는 제2 냉매순환라인(702) 측으로 흐르도록 냉매 흐름 방향을 전환한다. 제1 방향전환밸브(781)는 삼방향 밸브로 구성되는 것이 바람직하다.A first direction switching valve 781 is provided at a point where the first and second refrigerant circulation lines 701 and 702 are branched from the outlet side of the compressor 700. The first direction switching valve 781 switches the refrigerant flow direction so that the refrigerant discharged from the compressor 700 flows toward the first refrigerant circulation line 701 or the second refrigerant circulation line 702 in the cooling mode or the heating mode do. The first directional control valve 781 is preferably a three-way valve.

제1 냉각수라인(704)과 제2 냉각수라인(703,705)의 연결 지점에는 4방향 밸브(706)가 구비된다. 4방향 밸브(706)는 제1 냉각수라인(704)과 제2 냉각수라인(703,705)의 연결시키는 것으로서, 4방향 밸브(706)의 작동에 따라 히터코어(760)를 통과한 냉각수가 칠러(740) 및 엔진(761)을 통과하거나 칠러(740) 및 엔진(761)을 바이패스(Bypass) 한다. 엔진(761)에는 별도의 냉각라인(736)을 통해 제2 실외 열교환기(735)가 연결되는 것이 바람직하다.A four-way valve 706 is provided at a connection point between the first cooling water line 704 and the second cooling water line 703, 705. The four-way valve 706 connects the first cooling water line 704 and the second cooling water line 703 and 705. When the four-way valve 706 operates, the cooling water passing through the heater core 760 flows through the chiller 740 And the engine 761 or bypasses the chiller 740 and the engine 761. And the second outdoor heat exchanger 735 is connected to the engine 761 through a separate cooling line 736. [

또한, 제2 냉매순환라인(702)에는 수냉식 컨덴서(800)와 칠러(740)의 사이에 제2 팽창수단(721)이 구비된다. 이 경우, 상기 제1 팽창수단(720)은 기계식 또는 전자식으로 구동되는 팽창밸브(Expansion valve)로 이루어지고, 상기 제2 팽창수단(721)은 단방향 오리피스(Orifice)로 이루어지는 것이 바람직하다.The second refrigerant circulation line 702 is provided with a second expansion means 721 between the water-cooled condenser 800 and the chiller 740. In this case, it is preferable that the first expansion means 720 is an expansion valve driven by a mechanical or an electronically, and the second expansion means 721 is a unidirectional orifice.

아울러, 제2 냉각수라인(703,705)에는 냉각수를 가열시키는 가열수단(810)이 구비된다. 가열수단(810)은 PTC히터로 구성될 수 있으며, 수냉식 컨덴서(800)와 히터코어(760)의 사이에 구비되는 것이 바람직하다. 그리고, 제1 냉각수라인(704)에는 냉각수를 순환시키는 제1 워터펌프(707)가 구비되고, 제2 냉각수라인에는 냉각수를 순환시키는 제2 워터펌프(708)가 구비된다.In addition, the second cooling water lines 703 and 705 are provided with a heating means 810 for heating the cooling water. The heating means 810 may be a PTC heater and is preferably provided between the water-cooled condenser 800 and the heater core 760. The first cooling water line 704 is provided with a first water pump 707 for circulating cooling water, and the second cooling water line is provided with a second water pump 708 for circulating cooling water.

난방 냉각수 모드 시, 압축기(700)는 구동 정지되고, 제2 냉각수라인은 제1 냉각수라인(704)에 연결되어 냉각수가 수냉식 컨덴서(800), 히터코어(760), 칠러(740), 엔진(761), 수냉식 컨덴서(800)를 순환한다.In the heating cooling water mode, the compressor 700 is stopped and the second cooling water line is connected to the first cooling water line 704 so that the cooling water is circulated through the water-cooled condenser 800, the heater core 760, the chiller 740, 761) and a water-cooled condenser (800).

난방 히트펌프 모드 시, 압축기(700)에서 배출된 냉매는 수냉식 컨덴서(800), 칠러(740), 압축기(700)를 순환하고, 제2 냉각수라인은 제1 냉각수라인(704)을 바이패스하여 냉각수가 수냉식 컨덴서(800), 히터코어(760), 수냉식 컨덴서(800)를 순환한다. 제1 냉각수라인(704)의 냉각수는 엔진(761), 칠러(740), 엔진(761)을 제2 냉각수라인에 대해 독립적으로 순환한다.In the heating heat pump mode, the refrigerant discharged from the compressor 700 circulates through the water-cooled condenser 800, the chiller 740, and the compressor 700, and the second cooling water line bypasses the first cooling water line 704 The cooling water circulates through the water-cooled condenser 800, the heater core 760, and the water-cooled condenser 800. The cooling water of the first cooling water line 704 circulates engine 761, chiller 740, and engine 761 independently of the second cooling water line.

한편, 차량용 히트펌프 시스템은 냉각수의 온도를 감지하는 냉각수온도 감지수단을 구비한다. 차량용 히트펌프 시스템의 제어부는 감지된 냉각수의 온도가 기준 온도보다 낮은 경우 난방 히트펌프 모드를 수행하며, 감지된 냉각수의 온도가 기준 온도보다 높은 경우 난방 냉각수 모드를 수행한다.On the other hand, the vehicle heat pump system is provided with cooling water temperature sensing means for sensing the temperature of the cooling water. The controller of the vehicle heat pump system performs the heat pump mode when the sensed temperature of the coolant is lower than the reference temperature and performs the heat coolant mode when the sensed temperature of the coolant is higher than the reference temperature.

도 4는 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 냉방 모드를 도시한 것이다.4 illustrates a cooling mode of a vehicle heat pump system according to an embodiment of the present invention.

도 4를 참조하면, 냉방 모드 시, 제1 방향전환밸브(781)의 제어에 의해 제1 냉매순환라인(701)을 따라 냉매가 순환된다. 최대 냉방시 공조케이스(750) 내의 온도조절도어(751)는 히터코어(760)를 통과하는 통로를 폐쇄하도록 작동하여, 블로어에 의해 공조케이스(750) 내로 송풍된 공기가 증발기(710)를 통과하면서 냉각된 후 히터코어(760)를 바이패스 하여 차실내로 공급됨으로써 차실내가 냉방된다.Referring to FIG. 4, in the cooling mode, the refrigerant is circulated along the first refrigerant circulation line 701 under the control of the first direction switching valve 781. The temperature control door 751 in the air conditioning case 750 during maximum cooling functions to close the passage through the heater core 760 so that the air blown into the air conditioning case 750 by the blower passes through the evaporator 710 The heater core 760 is bypassed and supplied to the interior of the vehicle, thereby cooling the interior of the vehicle.

압축기(700)에서 압축된 후 배출되는 고온 고압의 기상 냉매는 제1 방향전환밸브(781)를 거쳐 실외 열교환기(730)로 공급된다. 실외 열교환기(730)로 공급된 냉매는 외기와 열교환하여 응축되며 기상 냉매가 액상 냉매로 바뀌게 된다. 계속해서, 실외 열교환기(730)를 통과한 냉매는 제1 팽창수단(720)을 통과하는 과정에서 감압 팽창되어 저온 저압의 액상냉매가 된 후 증발기(710)로 유입된다.The gaseous refrigerant of high temperature and high pressure discharged after being compressed by the compressor 700 is supplied to the outdoor heat exchanger 730 through the first direction switching valve 781. The refrigerant supplied to the outdoor heat exchanger 730 is heat-exchanged with the outside air to be condensed, and the gaseous refrigerant is converted into liquid refrigerant. Subsequently, the refrigerant having passed through the outdoor heat exchanger 730 is decompressed and expanded in the process of passing through the first expansion means 720, and becomes the low-temperature and low-pressure liquid refrigerant, and then flows into the evaporator 710.

증발기(710)로 유입된 냉매는 블로어를 통해 공조케이스(750) 내부로 송풍되는 공기와 열교환하여 증발함과 동시에 냉매의 증발 잠열에 의한 흡열 작용으로 공기를 냉각하게 되며, 이처럼 냉각된 공기가 차량 실내로 공급되어 냉방이 이루어진다. 이후, 증발기(710)에서 배출된 냉매는 어큐뮬레이터(770)를 거쳐 압축기(700)로 유입되면서 전술한 바와 같은 사이클을 반복한다.The refrigerant flowing into the evaporator 710 is heat-exchanged with the air blown into the air conditioning case 750 through the blower to evaporate, and at the same time, the air is cooled by an endothermic effect due to the latent heat of evaporation of the refrigerant. And is supplied to the room for cooling. Thereafter, the refrigerant discharged from the evaporator 710 flows into the compressor 700 through the accumulator 770, and repeats the above-described cycle.

이 경우, 엔진(761)을 통과한 냉각수는 수냉식 컨덴서(800), 가열수단(810), 히터코어(760)를 지나고 4방향 밸브(706)에 의해 칠러(740)를 지나 엔진(761)을 순환한다.In this case, the cooling water that has passed through the engine 761 passes through the water-cooled condenser 800, the heating means 810, the heater core 760, the four-way valve 706 through the chiller 740, Circulate.

도 5는 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 난방 히트펌프 모드를 도시한 것이다.5 shows a heating heat pump mode of a vehicle heat pump system according to an embodiment of the present invention.

도 5를 참조하면, 냉각수 온도가 비교적 낮아 난방 히트펌프 모드를 수행하는 경우, 제1 방향전환밸브(781)의 제어에 의해 제2 냉매순환라인(702)을 따라 냉매가 순환된다. 최대 난방시 공조케이스(750) 내의 온도조절도어(751)는 히터코어(760)를 바이패스하는 통로를 폐쇄하도록 작동하여, 블로어에 의해 공조케이스(750) 내로 송풍된 공기가 히터코어(760)를 통과하면서 온풍으로 바뀌어 차실내로 공급됨으로써 차실내가 난방된다.Referring to FIG. 5, when the cooling water temperature is relatively low, the refrigerant is circulated along the second refrigerant circulation line 702 under the control of the first directional control valve 781 when the heating heat pump mode is performed. The temperature control door 751 in the air conditioning case 750 at the time of maximum heating operates so as to close the passage bypassing the heater core 760 so that the air blown into the air conditioning case 750 by the blower is supplied to the heater core 760, And is supplied to the inside of the car, thereby heating the inside of the car.

압축기(700)에서 압축된 후 배출되는 고온 고압의 기상 냉매는 제1 방향전환밸브(781)를 거쳐 수냉식 컨덴서(800)를 통과하면서 수냉식 컨덴서(800)를 지나는 냉각수를 가열한다. 수냉식 컨덴서(800)에서 응축된 냉매는 제2 팽창수단(721)을 지난 팽창한 후 칠러(740)를 지나 엔진 폐열을 회수한 후 압축기(700)로 다시 순환된다.The high-temperature and high-pressure gaseous refrigerant compressed by the compressor 700 and then discharged through the first direction switching valve 781 passes through the water-cooled condenser 800 to heat the cooling water passing through the water-cooled condenser 800. The refrigerant condensed in the water-cooled condenser 800 expands past the second expansion means 721, passes through the chiller 740, recovers the engine waste heat, and then is circulated back to the compressor 700.

이 경우, 수냉식 컨덴서(800)에서 가열된 냉각수는 히터코어(760)를 지나 공기와 열교환함으로써 실내 난방을 수행하게 된다. 즉, 수냉식 컨덴서(800)를 지난 냉각수는 제2 냉각수라인(703,705)을 따라 히터코어(760)를 지나 4방향 밸브(706)에 의해 칠러(740) 및 엔진(761)을 바이패스하여 다시 수냉식 컨덴서(800)로 순환된다. 한편, 제1 냉각수라인(704)을 유동하는 냉가수는 엔진(761), 칠러(740), 엔진(761)을 순환한다. 상기에서, 제2 냉각수라인의 히터코어(760)는 발열부로 작용하며, 제1 냉각수라인의 칠러(740)는 흡열부로 작용한다.In this case, the cooling water heated by the water-cooled condenser 800 performs the indoor heating by heat-exchanging with the air through the heater core 760. That is, the cooling water passing through the water-cooled condenser 800 passes through the heater core 760 along the second cooling water lines 703 and 705, bypasses the chiller 740 and the engine 761 by the four-way valve 706, Is circulated to the condenser (800). On the other hand, the cold water flowing in the first cooling water line 704 circulates through the engine 761, the chiller 740, and the engine 761. In the above, the heater core 760 of the second cooling water line serves as a heat generating portion, and the chiller 740 of the first cooling water line serves as a heat absorbing portion.

도 6은 본 발명의 일 실시 예에 따른 차량용 히트펌프 시스템의 난방 냉각수 모드를 도시한 것이다.6 shows a heating cooling water mode of a vehicle heat pump system according to an embodiment of the present invention.

도 6을 참조하면, 냉각수 온도가 비교적 높아 난방 냉각수 모드를 수행하는 경우, 압축기(700)의 구동은 정지된다. 이 경우, 엔진(761)을 통과한 냉각수는 수냉식 컨덴서(800), 가열수단(810), 히터코어(760)를 지나고 4방향 밸브(706)에 의해 칠러(740)를 지나 엔진(761)을 순환한다.Referring to FIG. 6, when the cooling water temperature is relatively high to perform the heating / cooling water mode, the operation of the compressor 700 is stopped. In this case, the cooling water that has passed through the engine 761 passes through the water-cooled condenser 800, the heating means 810, the heater core 760, the four-way valve 706 through the chiller 740, Circulate.

이러한 구성을 통해, 차량용 히트펌프 시스템을 하이브리드 적용 시 내연기관과 공용으로 사용이 가능하고, 발열부인 히터코어와 흡열부인 칠러를 서로 다른 냉각수라인으로 분리하여 구성함으로써 엔진 폐열을 열원으로만 독립적으로 사용이 가능하다. 아울러, 별도의 PTC히터(가열수단)을 통해 냉각수를 안정적으로 제어 가능하다.With this configuration, the vehicle heat pump system can be used in common with the internal combustion engine when hybrid is applied, and the heater core, which is the heat generating part, and the chiller, which is the heat absorbing part, are separated into different cooling water lines, This is possible. In addition, the cooling water can be stably controlled through a separate PTC heater (heating means).

즉, 종래의 히트펌프 시스템은 차량의 엔진 폐열을 난방열 및 히트펌프 저온부의 열원으로 동시에 사용하여 히트펌프를 작동시킴에 따라, 냉각수의 온도가 급격히 변하며 냉각수 온도에 따라 증발기를 지난 따뜻한 공기가 히터코어를 흐르는 냉각수를 가열시키는 조건이 발생하기도 한다. 아울러, 증발기를 통한 난방은 별도의 고압용 증발기가 요구되므로 생산에 별도 관리가 요구된다.That is, in the conventional heat pump system, the heat pump is operated by using the engine waste heat of the vehicle at the same time as the heating heat and the heat source of the low temperature part of the heat pump, the temperature of the cooling water is rapidly changed, and the warm air passing through the evaporator, There is a possibility that a condition for heating the cooling water flowing through the cooling medium In addition, since heating through the evaporator requires a separate high pressure evaporator, separate management of the production is required.

본 발명의 일 실시 예에 따른 히트펌프 시스템은 4방향 밸브를 이용하여 난방용 냉각수 루프(제1 냉각수라인)와 히트펌프 열원용 냉각수 루프(제2 냉각수라인)를 분리하여 효과적으로 엔진의 폐열을 이용할 수 있다. 수냉식 컨덴서와 PTC히터(가열수단)을 통해 안정적인 냉각수의 온도 제어가 가능하며, 기존 내연기관의 증발기 및 히터코어를 공용으로 사용하여 별도의 관리없이 공조장치의 공용화가 가능해진다.The heat pump system according to an embodiment of the present invention can effectively use the waste heat of the engine by separating the cooling water loop for heating (first cooling water line) and the cooling water loop for the heat pump heat source (second cooling water line) have. It is possible to control the temperature of cooling water stably through water-cooled condenser and PTC heater (heating means). By using evaporator and heater core of existing internal combustion engine in common, it becomes possible to share air conditioner without any special management.

한편, 도 7은 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템을 도시한 것이고, 도 8은 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템의 난 방 히트펌프 모드를 도시한 것이며, 도 9는 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템의 난방 냉각수 모드를 도시한 것이다.FIG. 7 shows a vehicle heat pump system according to another embodiment of the present invention. FIG. 8 shows a heat pump mode of an automotive heat pump system according to another embodiment of the present invention. Shows a heating and cooling water mode of a vehicle heat pump system according to another embodiment of the present invention.

도 7 내지 도 9를 참조하면, 본 발명의 다른 실시 예에 따른 차량용 히트펌프 시스템은 전술한 실시 예와 비교하여 제3 냉각수라인(850)과, 제2 방향전환밸브(820) 및 제3 방향전환밸브(830)를 더 구비한다. 본 실시 예에서 전술한 실시 예와 중복되는 구성은 설명을 생략한다.7 to 9, a vehicle heat pump system according to another embodiment of the present invention includes a third cooling water line 850, a second direction switching valve 820, and a third direction And further includes a switching valve 830. In the present embodiment, a description overlapping with the above-described embodiment is omitted.

제3 냉각수라인(850)은 수냉식 컨덴서(800)의 상류측 제2 냉각수라인에서 분지되어 히터코어(760)의 하류측 제2 냉각수라인에 연결된다. 제2 방향전환밸브(820)는 수냉식 컨덴서(800)의 상류측에서 제2 냉각수라인과 제3 냉각수라인(850)의 연결지점에 구비된다. 제3 방향전환밸브(830)는 히터코어(760)의 하류측에서 제2 냉각수라인과 제3 냉각수라인(850)의 연결지점에 구비된다. 제2 방향전환밸브(820) 및 제3 방향전환밸브(830)는 삼방향 밸브로 구성되는 것이 바람직하다. 제1 냉각수라인(704)에는 냉각수를 순환시키는 제1 워터펌프(707)가 구비되며, 제3 냉각수라인(850)에는 냉각수를 순환시키는 제2 워터펌프(840)가 구비된다.The third cooling water line 850 is branched from the second cooling water line on the upstream side of the water-cooled condenser 800 and is connected to the second cooling water line on the downstream side of the heater core 760. The second directional control valve 820 is provided at the connection point between the second cooling water line and the third cooling water line 850 on the upstream side of the water-cooled condenser 800. The third directional control valve 830 is provided at the connection point between the second cooling water line and the third cooling water line 850 on the downstream side of the heater core 760. The second directional control valve 820 and the third directional control valve 830 are preferably configured as three-way valves. The first cooling water line 704 is provided with a first water pump 707 for circulating cooling water and the third cooling water line 850 is provided with a second water pump 840 for circulating cooling water.

냉각수의 온도가 기준 온도보다 낮은 경우 난방 히트펌프 모드를 수행한다. 도 8에 도시된 것처럼, 난방 히트펌프 모드 시, 냉매의 유동과 제1 냉각수라인의 냉각수 유동은 전술한 실시 예와 동일하다. 제2 냉각수라인의 유동을 살펴보면, 히터코어(760)를 통과한 냉각수는 제3 방향전환밸브(830)에 의해 제3 냉각수라인(850)을 지나 제2 방향전환밸브(820)에 의해 수냉식 컨덴서(800), 히터코어(760)를 순환한다.If the cooling water temperature is lower than the reference temperature, the heating heat pump mode is performed. As shown in Fig. 8, in the heating heat pump mode, the refrigerant flow and the cooling water flow in the first cooling water line are the same as in the above-described embodiment. The cooling water that has passed through the heater core 760 passes through the third cooling water line 850 by the third direction switching valve 830 and flows into the water cooling type condenser 810 by the second direction switching valve 820, (800), and the heater core (760).

또한, 냉각수의 온도가 기준 온도보다 높은 경우 난방 냉각수 모드를 수행한다. 도 9에 도시된 것처럼, 난방 냉각수 모드 시, 냉매 및 냉각수의 유동은 전술한 실시 예와 동일하다. 즉, 엔진(761)을 통과한 냉각수는 제2 방향전환밸브(820)에 의해 제3 냉각수라인(850)을 바이패스하여 수냉식 컨덴서(800), 히터코어(760)를 지난 후 제3 방향전환밸브(830)에 의해 칠러(740), 엔진(761)을 순환한다.When the temperature of the cooling water is higher than the reference temperature, the heating water cooling mode is performed. As shown in Fig. 9, in the heating cooling water mode, the flow of the refrigerant and the cooling water is the same as in the above-described embodiment. That is, the cooling water having passed through the engine 761 bypasses the third cooling water line 850 by the second direction switching valve 820, passes through the water-cooled condenser 800 and the heater core 760, The chiller 740 and the engine 761 are circulated by the valve 830.

이와 같이, 제3 냉각수라인과 2개의 삼방향 밸브(제2 방향전환밸브 및 제3 방향전환밸브)를 추가 구성함에 따라 냉각수 루프(Loop)를 2개로 구비하여 수냉식 컨덴서(800) 및 가열수단(810)만을 지나는 별도의 루프를 구성한다. 아울러, 칠러와 엔진만 지나는 별도의 루프가 구성된다.As described above, since the third cooling water line and the two three-way valves (the second direction switching valve and the third direction switching valve) are additionally provided, the cooling water loops are provided in the two cooling water condensers 800 and the heating means 810). ≪ / RTI > In addition, a separate loop is made through the chiller and the engine only.

이러한 구성을 통해, 냉각수 열원을 이용하여 히트펌프 시스템으로 작동할 경우, 고온 냉각수 루프를 별도 루프로 분리하여 루프의 전체 길이를 축소시킬 수 있다. 이로 인해, 외부로 손실되는 에너지를 저감시키고 동일 파워에서 흘릴 수 있는 냉각수 유량을 증대시킬 수 있어 난방 성능이 증대된다.With this arrangement, when the cooling water heat source is used to operate as a heat pump system, the high temperature cooling water loop can be separated into separate loops to reduce the overall length of the loop. Thus, the energy lost to the outside can be reduced and the flow rate of the cooling water that can be flowed at the same power can be increased, so that the heating performance is increased.

정리하면, 종래의 수가열 컨덴서를 갖는 히트펌프 시스템은 엔진 폐열을 이용한 히트펌프 시스템의 작동 시 고온 냉각수 루프는 엔진열 이용시 사용하는 냉각수 루프까지 순환해야 하기 때문에 외부로 손실되는 에너지가 많고 압력 수두가 높게 형성되어 높은 유량을 구현하기 힘들었다. 본 발명의 다른 실시 예에 따른 히트펌프 시스템은 수냉식 컨덴서, PTC히터(가열수단), 히터코어만을 통과하는 고온 냉각수 루프를 별도로 구성하여 외부로 손시로디는 에너지를 최소화하며, 냉각수라인의 길이를 짧게 형성하여 압력 수두 감소를 통한 유량 증대 효과를 갖는다.In summary, in a heat pump system having a conventional water-heating condenser, when the heat pump system using engine waste heat is operated, the high-temperature coolant loop must circulate to the cooling water loop used when the engine heat is used. It is difficult to realize a high flow rate. In the heat pump system according to another embodiment of the present invention, a water-cooled condenser, a PTC heater (heating means), and a high-temperature coolant loop passing through only the heater core are separately formed to minimize the energy for external hand- And has an effect of increasing the flow rate by reducing the pressure head.

지금까지 본 발명에 따른 차량용 히트펌프 시스템은 도면에 도시된 실시 예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 당업자라면 누구든지 이로부터 다양한 변형 및 균등한 다른 실시 예가 가능하다는 점을 이해할 것이다. 따라서, 진정한 기술적 보호 범위는 첨부된 특허청구범위의 기술적 사상에 의하여 정해져야 할 것이다.Although the vehicle heat pump system according to the present invention has been described above with reference to the embodiments shown in the drawings, it is to be understood that various modifications and equivalent embodiments are possible without departing from the scope of the present invention. Accordingly, the scope of the true technical protection should be determined by the technical idea of the appended claims.

700: 압축기 710: 증발기
720: 제1 팽창수단 721: 제2 팽창수단
730: 실외열교환기 740: 칠러
750: 공조케이스 751: 온도조절도어
760: 히터코어 770: 어큐뮬레이터
781: 제1 방향전환밸브
701: 제1 냉매순환라인 702: 제2 냉매순환라인
704: 제1 냉각수라인 703,705: 제2 냉각수라인
706: 4방향 밸브 800: 수냉식 컨덴서
810: 가열수단 820: 제2 방향전환밸브
830: 제3 방향전환밸브700: compressor 710: evaporator
720: first expansion means 721: second expansion means
730: outdoor heat exchanger 740: chiller
750: air conditioning case 751: temperature control door
760: Heater core 770: Accumulator
781: first direction switching valve
701: first refrigerant circulation line 702: second refrigerant circulation line
704: first cooling water line 703, 705: second cooling water line
706: Four-way valve 800: Water-cooled condenser
810: Heating means 820: Second direction switching valve
830: Third direction switching valve

Claims (17)

차량 구동품과 칠러(740)를 연결하여 냉각수를 순환하는 제1 냉각수라인(704);
공조케이스(750) 내부에 구비되어 차실내 난방에 사용되는 히터코어(760)와 수냉식 컨덴서(800)를 연결하여 냉각수가 순환하는 제2 냉각수라인; 및
상기 제1 냉각수라인(704)과 제2 냉각수라인 사이에 구비되는 밸브를 포함하고,
상기 밸브가 제1 방식으로 배열되는 경우 제1 냉각수라인(704)과 제2 냉각수라인은 별개로 작동하며,
상기 밸브가 제2 방식으로 배열되는 경우 제1 냉각수라인(704)과 제2 냉각수라인이 직렬로 연결되는 차량용 히트펌프 시스템.A first cooling water line 704 for connecting the vehicle drive unit and the chiller 740 to circulate the cooling water;
A second cooling water line provided in the air conditioning case 750 to connect the heater core 760 used for heating the passenger compartment and the water-cooled condenser 800 to circulate the cooling water; And
And a valve disposed between the first cooling water line (704) and the second cooling water line,
The first coolant line 704 and the second coolant line operate separately when the valves are arranged in a first manner,
Wherein the first cooling water line (704) and the second cooling water line are connected in series when the valve is arranged in a second manner. 제1 항에 있어서,
압축기(700), 실외 열교환기(730), 제1 팽창수단(720) 및 증발기(710)의 차실내 공조를 위한 냉매 라인이 구성되고,
상기 제1 냉각수라인(704)의 칠러(740)와 제2 냉각수라인의 수냉식 컨덴서(800)는 냉매 라인과 열교환 하는 차량용 히트펌프 시스템.The method according to claim 1,
A refrigerant line for air conditioning the passenger compartment of the compressor 700, the outdoor heat exchanger 730, the first expansion means 720, and the evaporator 710 is constructed,
The chiller 740 of the first cooling water line 704 and the water-cooled condenser 800 of the second cooling water line heat exchange with the refrigerant line. 제2 항에 있어서,
상기 칠러(740)는 압축기(700) 유입 전 냉매와 열교환 하는 차량용 히트펌프 시스템.3. The method of claim 2,
The chiller (740) exchanges heat with the refrigerant before the compressor (700) is introduced. 제2 항에 있어서,
상기 수냉식 컨덴서(800)는 압축기(700) 토출 냉매와 열교환 하는 차량용 히트펌프 시스템.3. The method of claim 2,
The water-cooled condenser (800) exchanges heat with the refrigerant discharged from the compressor (700). 제1 항에 있어서,
상기 수냉식 컨덴서(800)는 냉각수의 유동 방향으로 히터코어(760)의 상류측 제2 냉각수라인에 구비되고, 압축기(700)에서 배출된 냉매와 제2 냉각수라인을 흐르는 냉각수를 열교환시키며,
냉방 모드 시, 상기 압축기(700)에서 배출된 냉매가 실외 열교환기(730), 제1 팽창수단(720), 증발기(710), 압축기(700)를 순환하도록 냉매라인을 연결 구성하는 제1 냉매순환라인(701); 및
난방 히트펌프 모드 시, 상기 압축기(700)에서 배출된 냉매가 수냉식 컨덴서(800), 칠러(740), 압축기(700)를 순환하도록 냉매라인을 연결 구성하는 제2 냉매순환라인(702)을 포함하는 차량용 히트펌프 시스템.The method according to claim 1,
The water-cooled condenser 800 is provided in the second cooling water line on the upstream side of the heater core 760 in the flow direction of the cooling water, exchanges heat between the refrigerant discharged from the compressor 700 and the cooling water flowing through the second cooling water line,
The refrigerant discharged from the compressor 700 is circulated through the outdoor heat exchanger 730, the first expansion device 720, the evaporator 710, and the compressor 700, Circulation line 701; And
And a second refrigerant circulation line 702 connecting the refrigerant line to circulate the refrigerant discharged from the compressor 700 to the water-cooled condenser 800, the chiller 740, and the compressor 700 in the heating heat pump mode Vehicle heat pump system. 제1 항에 있어서,
상기 제1 냉각수라인(704)과 제2 냉각수라인을 연결시키는 4방향 밸브(706)를 구비하며, 상기 4방향 밸브(706)의 작동에 따라 히터코어(760)를 통과한 냉각수가 칠러(740) 및 엔진(761)을 통과하거나 바이패스하는 차량용 히트펌프 시스템.The method according to claim 1,
Way valve 706 for connecting the first cooling water line 704 with the second cooling water line and the cooling water having passed through the heater core 760 in accordance with the operation of the four- And an engine 761. The heat pump system according to the present invention is not limited to this. 제5 항에 있어서,
상기 제2 냉매순환라인(702)에는 수냉식 컨덴서(800)와 칠러(740)의 사이에 제2 팽창수단(721)이 구비되는 것을 특징으로 하는 차량용 히트펌프 시스템.6. The method of claim 5,
Wherein the second refrigerant circulation line (702) is provided with a second expansion means (721) between the water-cooled condenser (800) and the chiller (740). 제1 항에 있어서,
난방 냉각수 모드 시, 상기 압축기(700)는 구동 정지되고, 상기 제2 냉각수라인은 제1 냉각수라인(704)에 연결되어 냉각수가 수냉식 컨덴서(800), 히터코어(760), 칠러(740), 엔진(761), 수냉식 컨덴서(800)를 순환하는 것을 특징으로 하는 차량용 히트펌프 시스템.The method according to claim 1,
In the heating cooling water mode, the compressor 700 is stopped and the second cooling water line is connected to the first cooling water line 704 so that the cooling water is circulated through the water-cooled condenser 800, the heater core 760, the chiller 740, An engine (761), and a water-cooled condenser (800). 제8 항에 있어서,
난방 히트펌프 모드 시, 상기 압축기(700)에서 배출된 냉매가 수냉식 컨덴서(800), 칠러(740), 압축기(700)를 순환하고, 상기 제2 냉각수라인은 제1 냉각수라인(704)을 바이패스하여 냉각수가 수냉식 컨덴서(800), 히터코어(760), 수냉식 컨덴서(800)를 순환하며, 제1 냉각수라인(704)의 냉각수는 엔진(761), 칠러(740), 엔진(761)을 제2 냉각수라인에 대해 독립적으로 순환하는 것을 특징으로 하는 차량용 히트펌프 시스템.9. The method of claim 8,
In the heating heat pump mode, the refrigerant discharged from the compressor 700 circulates through the water-cooled condenser 800, the chiller 740, and the compressor 700, and the second cooling water line circulates the first cooling water line 704 Cooling water circulates through the water-cooled condenser 800, the heater core 760 and the water-cooled condenser 800. The cooling water in the first cooling water line 704 circulates through the engine 761, the chiller 740, and the engine 761 And the second cooling water line is circulated independently with respect to the second cooling water line. 제9 항에 있어서,
냉각수의 온도를 감지하는 냉각수온도 감지수단을 구비하고,
냉각수의 온도가 기준 온도보다 낮은 경우 상기 난방 히트펌프 모드를 수행하며, 냉각수의 온도가 기준 온도보다 높은 경우 상기 난방 냉각수 모드를 수행하는 것을 특징으로 하는 차량용 히트펌프 시스템.10. The method of claim 9,
And cooling water temperature sensing means for sensing the temperature of the cooling water,
Wherein the heat pump mode is performed when the temperature of the cooling water is lower than the reference temperature, and the heating / cooling water mode is performed when the temperature of the cooling water is higher than the reference temperature. 제1 항에 있어서,
상기 제2 냉각수라인에는 냉각수를 가열시키는 가열수단(810)이 구비되는 것을 특징으로 하는 차량용 히트펌프 시스템.The method according to claim 1,
Wherein the second cooling water line is provided with a heating means (810) for heating the cooling water. 제1 항에 있어서,
상기 제1 냉각수라인(704)에는 냉각수를 순환시키는 제1 워터펌프(707)가 구비되고, 상기 제2 냉각수라인에는 냉각수를 순환시키는 제2 워터펌프(708)가 구비되는 것을 특징으로 하는 차량용 히트펌프 시스템.The method according to claim 1,
Wherein the first cooling water line (704) is provided with a first water pump (707) for circulating cooling water, and a second water pump (708) for circulating cooling water is provided in the second cooling water line Pump system. 제5 항에 있어서,
상기 압축기(700)의 출구 측에서 제1,2 냉매순환라인(701,702)이 분지되는 지점에, 냉방 모드 또는 난방 모드에 따라 압축기(700)에서 배출된 냉매가 제1 냉매순환라인(701) 또는 제2 냉매순환라인(702) 측으로 흐르도록 냉매 흐름 방향을 전환하는 제1 방향전환밸브(781)가 구비되는 것을 특징으로 하는 차량용 히트펌프 시스템.6. The method of claim 5,
The refrigerant discharged from the compressor 700 is discharged to the first refrigerant circulation line 701 or the second refrigerant circulation line 703 at the point where the first and second refrigerant circulation lines 701 and 702 are branched at the outlet side of the compressor 700, And a first direction switching valve (781) for switching the refrigerant flow direction so as to flow toward the second refrigerant circulation line (702). 제1 항에 있어서,
상기 수냉식 컨덴서(800)의 상류측 제2 냉각수라인에서 분지되어 히터코어(760)의 하류측 제2 냉각수라인에 연결되는 제3 냉각수라인(850)이 구비되는 것을 특징으로 하는 차량용 히트펌프 시스템.The method according to claim 1,
And a third cooling water line (850) branched from the second cooling water line on the upstream side of the water-cooled condenser (800) and connected to the second cooling water line on the downstream side of the heater core (760). 제14 항에 있어서,
수냉식 컨덴서(800)의 상류측에서 제2 냉각수라인과 제3 냉각수라인(850)의 연결지점에 구비되는 제2 방향전환밸브(820) 및
히터코어(760)의 하류측에서 제2 냉각수라인과 제3 냉각수라인(850)의 연결지점에 구비되는 제3 방향전환밸브(830)를 포함하는 것을 특징으로 하는 차량용 히트펌프 시스템.15. The method of claim 14,
A second direction switching valve 820 provided at a connection point between the second cooling water line and the third cooling water line 850 on the upstream side of the water-cooled condenser 800,
And a third direction switching valve (830) provided at a connection point between the second cooling water line and the third cooling water line (850) on the downstream side of the heater core (760). 제15 항에 있어서,
냉각수의 온도가 기준 온도보다 낮은 경우, 히터코어(760)를 통과한 냉각수는 제3 방향전환밸브(830)에 의해 제3 냉각수라인(850)을 지나 제2 방향전환밸브(820)에 의해 수냉식 컨덴서(800), 히터코어(760)를 순환하는 것을 특징으로 하는 차량용 히트펌프 시스템.16. The method of claim 15,
When the temperature of the cooling water is lower than the reference temperature, the cooling water having passed through the heater core 760 passes through the third cooling water line 850 by the third direction switching valve 830, The condenser (800), and the heater core (760). 제15 항에 있어서,
냉각수의 온도가 기준 온도보다 높은 경우, 엔진(761)을 통과한 냉각수는 제2 방향전환밸브(820)에 의해 제3 냉각수라인(850)을 바이패스하여 수냉식 컨덴서(800), 히터코어(760)를 지난 후 제3 방향전환밸브(830)에 의해 칠러(740), 엔진(761)을 순환하는 것을 특징으로 하는 차량용 히트펌프 시스템.16. The method of claim 15,
When the temperature of the cooling water is higher than the reference temperature, the cooling water that has passed through the engine 761 bypasses the third cooling water line 850 by the second direction switching valve 820 to cool the water-cooled condenser 800, the heater core 760 ), And then circulates the chiller (740) and the engine (761) by the third direction switching valve (830).
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Publication number Priority date Publication date Assignee Title
CN109334392A (en) * 2018-11-12 2019-02-15 珠海格力电器股份有限公司 Vehicle and its heat management system

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KR20140126846A (en) 2013-04-23 2014-11-03 한라비스테온공조 주식회사 Heat pump system for vehicle

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KR20140126846A (en) 2013-04-23 2014-11-03 한라비스테온공조 주식회사 Heat pump system for vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109334392A (en) * 2018-11-12 2019-02-15 珠海格力电器股份有限公司 Vehicle and its heat management system

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