KR20110031545A - Air conditioner for vehicle - Google Patents

Air conditioner for vehicle Download PDF

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Publication number
KR20110031545A
KR20110031545A KR1020090088846A KR20090088846A KR20110031545A KR 20110031545 A KR20110031545 A KR 20110031545A KR 1020090088846 A KR1020090088846 A KR 1020090088846A KR 20090088846 A KR20090088846 A KR 20090088846A KR 20110031545 A KR20110031545 A KR 20110031545A
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KR
South Korea
Prior art keywords
ejector
cold storage
refrigerant
evaporator
vehicle air
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KR1020090088846A
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Korean (ko)
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KR101585899B1 (en
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강성호
김용상
이준강
황선종
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한라공조주식회사
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    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/08—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using ejectors
    • 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
    • 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
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements

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

Abstract

PURPOSE: An air conditioner for a vehicle is provided to simultaneously control the thermal load of an evaporator and a cold storage unit by using one expansion valve. CONSTITUTION: An air conditioner for a vehicle comprises a cold air storage unit(200). The cold air storage unit stores a part of a refrigerant circulating through a compressor(110), a condenser(120), an expansion valve(130), and an evaporator(100). An ejector(140) is installed between the expansion valve and the evaporator. The refrigerant, in which the pressure and temperature are reduced, is supplied to the evaporator and the cold air storage unit through the ejector.

Description

차량용 공조장치{AIR CONDITIONER FOR VEHICLE}Automotive air conditioning unit {AIR CONDITIONER FOR VEHICLE}

본 발명은 차량용 공조장치에 관한 것으로, 보다 상세하게는 냉매를 이용한 축냉시스템에서 팽창밸브와 에바코어 사이에 코안다 효과를 갖는 이젝터를 설치하여 축냉시간을 단축하고 축냉성능을 향상시킬 수 있도록 개선된 차량용 공조장치에 관한 것이다.The present invention relates to an air conditioner for a vehicle, and more particularly, an ejector having a coanda effect is provided between an expansion valve and an eva core in a refrigerant storage system using a refrigerant, and thus, an improvement is made to shorten the storage time and improve the storage performance. It relates to a vehicle air conditioner.

일반적으로, 차량용 공조장치는 하절기나 동절기에 차량 실내를 냉,난방하거나 또는 우천시나 동절기에 윈드실드에 끼게 되는 성에 등을 제거하여 운전자의 전후방 시야가 확보될 수 있게 할 목적으로 설치되는 차량 내장품으로, 이러한 공조장치는 통상 난방장치와 냉방장치를 동시에 갖추고 있어서 외기나 내기를 선택적으로 도입한 후 이 공기를 가열 또는 냉각시켜 차량의 실내에 송풍함으로써 차량 실내를 냉,난방하거나 또는 환기하게 된다.In general, the vehicle air conditioner is a vehicle interior that is installed for the purpose of securing the driver's front and rear view by removing the frost, such as cooling or heating the interior of the vehicle during the summer or winter, or being stuck in the windshield during the rain or winter. In addition, such an air conditioner is usually equipped with a heating device and a cooling device at the same time, and by selectively introducing the outside air or bet, the air is heated or cooled and blown into the interior of the vehicle to cool, heat or ventilate the vehicle interior.

이와 함께, 연비 향상과 환경보호를 목적으로 최근 출시되고 있는 하이브리드 차량 또는 전기자동차에는 축냉시스템이 장착된다.In addition, a hybrid vehicle or an electric vehicle that is recently released for the purpose of improving fuel efficiency and environmental protection is equipped with a heat storage system.

이들 차량에 장착되는 축냉시스템은 하이브리드 자동차 또는 전기자동차가 주행중 정차시 차량 연비 향상을 위해 엔진을 오프할 때 하절기 냉방 성능 확보를 위해 구비된다.The refrigeration system mounted on these vehicles is provided to secure cooling performance in summer when the engine is turned off to improve vehicle fuel efficiency when the hybrid vehicle or the electric vehicle stops while driving.

그리하여, 주행시에는 에어컨 동작과 함께 차가운 열원을 축냉재에 보관하고, 주행중 정차시 에어컨 압축기가 오프되어도 찬바람이 토출되도록 하여 일시적인 냉방성능을 확보할 수 있게 된다.Thus, when driving, the cooling heat source is stored in the coolant along with the operation of the air conditioner, and cold air is discharged even when the air conditioner compressor is turned off during driving, thereby ensuring temporary cooling performance.

이러한 축냉시스템은 보통 축냉재가 들어 있는 축냉저장고(Cold Storage)에 차량 에어컨으로부터 분기된 배관을 통해 차량 에어컨 작동시 냉매를 순환시켜 축냉하는 시스템으로 축냉저장고 내부에서 냉매와 축냉재 간의 열교환을 유도하고, 또 축냉재와 열교환된 냉각수가 축냉증발기로 이동되며, 이를 강제 순환시키는 순환펌프를 통해 냉기를 발생시키도록 구성되며, 축냉시키는 냉매라인은 축냉 조건에 따라 온/오프 가능하게 구성된다.Such a cold storage system is a system in which a refrigerant is circulated through a pipe branched from a vehicle air conditioner in a cold storage containing a cold storage material to circulate the refrigerant during operation of the vehicle air conditioner to induce heat exchange between the refrigerant and the cold storage material in the cold storage reservoir. In addition, the coolant exchanged with the coolant is transferred to the coolant evaporator, and configured to generate cold air through a circulation pump forcibly circulating the coolant, and the coolant line for coolant is configured to be on / off according to the coolant condition.

그런데, 이와 같은 종래 축냉시스템은 고 열부하 조건에서 정상적인 에어컨 작동중에 축냉재를 축냉하는 시스템이 동시에 작동되면 차량 에어컨의 성능이 저하될 수 있으며, 축냉시스템으로 작동하는 냉매 상태에 따라 에어컨 작동상태가 불완전해 질 수 있다.However, such a conventional refrigeration system is a performance of the vehicle air conditioner may be degraded when the system for storing the cold storage material at the same time during normal air conditioner operation under high heat load conditions, the air conditioner operation state is incomplete depending on the refrigerant operating as the cold storage system. Can be done.

또한, 도 1a 및 도 1b에 예시된 바와 같이, 축냉하기 위해 축냉저장고(30)와 연결배관된 냉매라인(10)의 온/오프용 전자변(20)을 제어할 수 있도록 별도의 장치가 요구되며, 아울러 축냉저장고(30)에서 냉매와 축냉재가 1차 열교환을 이룬 뒤 축냉재와 냉각수가 다시 2차 열교환을 해야 하므로 열교환 효율이 떨어지는 단점도 있다.In addition, as illustrated in FIGS. 1A and 1B, a separate device is required to control the on / off electromagnetic valve 20 of the refrigerant line 10 connected to the cold storage 30 to accumulate. In addition, since the coolant and the coolant have to perform second heat exchange again after the coolant and the coolant have made the first heat exchange in the cold storage, the heat exchange efficiency may be reduced.

본 발명은 상술한 바와 같은 종래 기술상의 제반 문제점들을 감안하여 이를 해결하고자 창출된 것으로, 팽창밸브와 증발기 사이에 코안다 효과를 얻을 수 있는 이젝터를 배치하여 단일 팽창밸브로 축냉열교환기 및 증발기의 열부하를 동시에 제어하도록 구성하여 축냉부와 축냉열교환기 사이에 냉각수를 순환하는 사이클이 형성되도록 함으로써 축냉시간을 단축하고, 축냉성능을 향상시킬 수 있도록 한 차량용 공조장치를 제공함에 그 주된 해결과제가 있다.The present invention was created in view of the above-described problems in the prior art, and arranged to solve this problem, by placing an ejector to obtain a coanda effect between the expansion valve and the evaporator, the heat load of the cold storage heat exchanger and the evaporator as a single expansion valve. The main problem is to provide a vehicle air conditioner that can be configured to control at the same time to form a cycle for circulating the cooling water between the cold storage unit and the cold storage heat exchanger to shorten the cold storage time and improve the cold storage performance.

본 발명은 상기한 해결 과제를 달성하기 위한 수단으로, 압축기, 응축기, 팽창밸브, 증발기를 순환하는 냉매 일부를 저장하여 축냉하는 축냉저장고를 포함하는 차량용 공조장치에 있어서; 상기 팽창밸브와 증발기 사이에는 이젝터가 더 설치되어, 상기 팽창밸브를 거쳐 감압 및 감온된 냉매가 상기 이젝터를 통해 상기 증발기 및 축냉저장고로 공급되도록 한 것을 특징으로 하는 차량용 공조장치를 제공한다.According to an aspect of the present invention, there is provided a vehicle air conditioner including a compressor, a condenser, an expansion valve, and a cold storage for storing and cooling a portion of a refrigerant circulating through an evaporator; An ejector is further provided between the expansion valve and the evaporator to provide a vehicle air conditioner, wherein the refrigerant decompressed and reduced in temperature through the expansion valve is supplied to the evaporator and the cold storage reservoir through the ejector.

이때, 상기 이젝터는 코안다 효과를 이용한 코안다 이젝터인 것에도 그 특징이 있다.At this time, the ejector is also characterized in that the coanda ejector using the Coanda effect.

또한, 상기 이젝터는 노즐의 출구측 벽면의 곡률반경을 가변시키는 것에 의해 축냉성능 및 축냉효율을 제어할 수 있는 것에도 그 특징이 있다.In addition, the ejector is characterized in that the cooling effect and the cooling efficiency can be controlled by varying the radius of curvature of the wall surface of the outlet side of the nozzle.

뿐만 아니라, 상기 축냉저장고는 상기 이젝터와 증발기 사이의 냉매파이프에서 분기되고, 상기 이젝터의 흡입측으로 연결된 냉매파이프에 의해 별도의 냉매순 환유로가 구성된 것에도 그 특징이 있다.In addition, the cold storage reservoir is characterized in that a separate refrigerant circulation passage is formed by a refrigerant pipe branched from the refrigerant pipe between the ejector and the evaporator, and connected to the suction side of the ejector.

아울러, 상기 축냉저장고에는 축냉재와 열교환되는 냉각수가 흐르는 냉각수파이프가 배관되고, 상기 냉각수 파이프의 일부에는 순환펌프 및 축냉열교환기가 설치되어 폐회로를 구성하는 것에도 그 특징이 있다.In addition, the cold storage pipe is connected to the coolant pipe through which the coolant to be exchanged with the coolant is heat exchanged, and a part of the coolant pipe is provided with a circulation pump and a cold storage heat exchanger to form a closed circuit.

그리고, 상기 이젝터의 주유동 냉매 유입구는 팽창밸브와 연결됨과 아울러 이젝터의 흡입유동 냉매 흡입구는 축냉저장고와 연결되며, 상기 이젝터의 출구는 증발기와 연결되도록 설치된 것에도 그 특징이 있다.In addition, the main flow refrigerant inlet of the ejector is connected to the expansion valve, the suction flow refrigerant inlet of the ejector is connected to the cold storage, and the outlet of the ejector is characterized in that it is installed to be connected to the evaporator.

또한, 상기 흡입유동 냉매 흡입구와 상기 주유동 냉매 유입구가 연결되는 부분은 냉매가 유출되는 방향으로 굽은 벽면을 갖는 슬릿 형상으로 형성된 것에도 그 특징이 있다.In addition, the suction flow refrigerant inlet port and the main flow refrigerant inlet portion is connected is characterized in that formed in a slit shape having a wall surface bent in the direction in which the refrigerant flows out.

본 발명에 따르면, 한 개의 팽창밸브를 이용하여 증발기와 축냉재의 열부하를 동시에 제어가능하고, 이젝터의 흡입 유동을 축냉시스템에 적용하여 증발기 압력보다 낮은 냉매압력, 온도조건에서 냉각수와 열교환하므로 기존 시스템보다 축냉성능이 뛰어나며, 축냉시 열부하에 따라 이젝터를 통해 냉매의 유량 제어도 가능한 효과를 얻을 수 있다.According to the present invention, it is possible to simultaneously control the heat load of the evaporator and the regenerator by using one expansion valve, and by applying the suction flow of the ejector to the refrigerating system, exchanging heat with the coolant under refrigerant pressure and temperature conditions lower than the evaporator pressure. More excellent cooling performance, it is possible to obtain the effect that can control the flow rate of the refrigerant through the ejector according to the heat load during the cooling.

이하에서는, 첨부도면을 참고하여 본 발명에 따른 바람직한 실시예를 보다 상세하게 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

도 2는 본 발명에 따른 축냉시스템이 구축된 차량용 공조장치의 냉각사이클 을 보인 회로도이고, 도 3은 본 발명에 따른 축냉시스템에 사용되는 이젝터를 보인 예시적인 모식도이다.Figure 2 is a circuit diagram showing a cooling cycle of the vehicle air conditioner is built in a cold storage system according to the present invention, Figure 3 is an exemplary schematic view showing an ejector used in the cold storage system according to the present invention.

도 2 및 도 3에 도시된 바와 같이, 본 발명에 따른 축냉시스템은 기본적인 차량 에어컨 시스템의 냉각사이클에서 사용되는 냉매를 동시에 이용하여 냉방과 축냉을 병행할 수 있도록 팽창밸브(TXV)(130)와 증발기(100) 사이에 코안다 효과를 갖는 코안다 이젝터(140)를 설치한 구성으로 이루어진다.As shown in Figures 2 and 3, the refrigeration system according to the present invention and the expansion valve (TXV) 130 to simultaneously cool and accumulate by using the refrigerant used in the cooling cycle of the basic vehicle air conditioning system and Coanda ejector 140 having a coanda effect between the evaporator 100 is made of a configuration provided.

그리하여, 냉매의 주 유동을 증발기(100)와 축냉저장고(Cold Storage)(200)로 분기하여 보내고, 축냉저장고(200)로 흐르는 냉매를 다시 이젝터(140)로 재흡입시킬 수 있게 된다.Thus, the main flow of the refrigerant is diverted to the evaporator 100 and the cold storage 200, and the refrigerant flowing into the cold storage 200 can be sucked back into the ejector 140 again.

이때, 기본적인 차량 에어컨 시스템은 증발기(100), 압축기(110), 응축기(120) 및 팽창밸브(130)를 냉매파이프(P1)가 연결된 상태에서 장입된 냉매가 압축기(110)에 의해 고온 고압상태로 토출되고, 토출된 냉매가 응축기(120)를 거치면서 방열되어 저온 고압상태를 유지한 채 팽창밸브(140)를 지나 증발기(100)로 유입되면서 저온 저압상태로 바뀌면서 증발 잠열에 의해 증발기(100) 주변을 냉각시키고, 냉각된 공기는 블로어(B)에 의해 필요 개소로 송풍되게 된다.At this time, the basic vehicle air-conditioning system is a high-temperature and high-pressure state of the refrigerant charged into the evaporator 100, the compressor 110, the condenser 120 and the expansion valve 130 while the refrigerant pipe (P1) is connected Discharged into the evaporator 100 while passing through the expansion valve 140 and entering the evaporator 100 while maintaining the low temperature and high pressure while the discharged refrigerant is radiated while passing through the condenser 120. ) The surroundings are cooled, and the cooled air is blown to the required position by the blower (B).

본 발명에서는 상기 이젝터(140)와 상기 축냉저장고(200) 사이를 별도의 냉매파이프(P2)로 연결하되, 이젝터(140)와 증발기(100) 사이의 냉매파이프(P1)로부터 분기하여 축냉저장고(200)로 연결배관하고, 축냉저장고(200)를 지난 냉매파이프(P2)를 이젝터(140)의 흡입측으로 연결 배관하는 형태로 축냉시스템이 구현된다.In the present invention is connected between the ejector 140 and the cold storage 200 by a separate refrigerant pipe (P2), branched from the refrigerant pipe (P1) between the ejector 140 and the evaporator 100 cold storage ( 200 is connected to the pipe, and the cold storage system is implemented in the form of connecting the refrigerant pipe (P2) passing through the cold storage 200 to the suction side of the ejector 140.

이때, 상기 축냉저장고(200)에는 냉매와 냉각수가 열교환되어 저장될 수 있 도록 축냉재가 내장되어 있으며, 주행중 정차시 축냉된 냉각수는 순환펌프(300)를 통해 HVAC 내부에 장착된 열교환기인 축냉열교환기(310)로 유입되어 열교환 된 후 다시 축냉저장고(200)로 순환될 수 있도록 냉각수파이프(P3)에 의해 냉매순환유로가 구성된다.At this time, the cold storage 200 has a cool storage material is built so that the refrigerant and the coolant can be exchanged and stored in the cool storage, and the coolant cooled during the stop while driving is a heat exchanger that is a heat exchanger mounted inside the HVAC through the circulation pump 300 The refrigerant circulation flow path is configured by the cooling water pipe (P3) to be circulated back to the cold storage 200 after the heat exchanged into the exchanger (310).

따라서, 차량의 기본적인 냉각사이클인 차량 에어컨 시스템은 앞서 설명한 바와 같이, 장입된 냉매가 압축기(110) → 응축기(120) → 팽창밸브(130) → 이젝터(140) → 증발기(100) → 압축기(110)를 반복 순환하면서 냉기를 생성하게 되고, 주행중 정차시 가동되는 축냉시스템은 이젝터(140) → 축냉저장고(200) → 이젝터(140)를 반복 순환하면서 축냉저장고(200) 내부에 축냉시키게 되며, 상기 축냉저장고(200)에 내장된 축냉재와 열교환하는 냉각수는 순환펌프(300) → 축냉열교환기(310) → 축냉저장고(200) → 순환펌프(300)의 폐회로를 순환하면서 주행중 정차시 차량내 냉방 성능을 확보하게 된다.Therefore, in the vehicle air conditioner system, which is a basic cooling cycle of the vehicle, as described above, the charged refrigerant is compressed by the compressor 110 → condenser 120 → expansion valve 130 → ejector 140 → evaporator 100 → compressor 110. Repeatedly circulate to generate cold air, and the cold storage system that is operated when the vehicle is stopped while driving is cooled down in the cold storage 200 by repeatedly circulating the ejector 140 → the cold storage 200 → the ejector 140. Cooling water that exchanges heat with the cold storage material stored in the cold storage 200 is circulated pump 300 → cold storage heat exchanger 310 → cold storage 200 → circulating the closed circuit of the circulation pump 300 while cooling the vehicle while driving Performance.

여기에서, 상기 이젝터(140)는 코안다 효과(Coanda effect)를 갖는 일명 코안다 이젝터로서, 도 3에 도시된 바와 같이, 팽창밸브(130)의 주유동(M)이 환형의 노즐을 통과하면서 노즐 출구 한쪽 면에 있는 벽면의 곡률반경(R)을 따라 유동방향이 변하면서 유동방향의 반대방향에 흡입유동(s)을 유도하게 되므로 주유동(M)이 있으면 흡입유동(s)에 의한 추진력으로 별도의 독립적인 사이클(Cycle)을 구성할 수 있게 된다.Here, the ejector 140 is a so-called Coanda ejector having a Coanda effect, as shown in Figure 3, while the main flow (M) of the expansion valve 130 passes through the annular nozzle As the flow direction changes along the curvature radius (R) of the wall on one side of the nozzle outlet, the suction flow (s) is induced in the opposite direction to the flow direction, so if there is a main flow (M), the driving force by the suction flow (s) As a result, a separate independent cycle can be configured.

이 경우, 독립적인 사이클이란 축냉저장고(200)로 유입되는 냉매사이클을 흡입력에 의해 작동시킬 수 있음을 의미한다.In this case, the independent cycle means that the refrigerant cycle flowing into the cold storage 200 can be operated by suction force.

이때, 코안다 효과란 물리적 현상으로서 물체 표면에서 수평방향으로 분출된 유체는 물체 표면을 따라 빠르게 진행해 나가고 이로 인해 주위에 낮은 압력 분포가 형성되는 현상을 말한다.In this case, the Coanda effect is a physical phenomenon in which the fluid ejected horizontally from the surface of the object proceeds rapidly along the surface of the object, whereby a low pressure distribution is formed around the object.

이 현상은 유체가 모세관과 같은 가는 슬릿을 통해 분출되는 경우 슬릿과 인접한 곳에 유출 방향에 대해 굽은 벽면이 있다면 그 표면을 따라 휘어져 흐르게 되는데 본 발명에서는 이를 이용한 것이다.This phenomenon is that when the fluid is ejected through a thin slit such as a capillary tube, if there is a curved wall surface in the outflow direction adjacent to the slit, it will bend along the surface thereof.

이를 위해, 상기 이젝터(140)의 주유동(M) 냉매 유입구(a)는 팽창밸브(130)와 연결됨과 아울러 이젝터(140)의 흡입유동(s) 냉매 흡입구(b)는 축냉저장고(200)와 연결되며, 상기 이젝터(140)의 출구(c)는 증발기(100)와 연결되도록 설치된다.To this end, the main flow (M) refrigerant inlet (a) of the ejector 140 is connected to the expansion valve 130 and the suction flow (s) refrigerant inlet (b) of the ejector 140 is a cold storage 200 It is connected to, and the outlet (c) of the ejector 140 is installed to be connected to the evaporator (100).

또한, 상기 흡입유동(s) 냉매 흡입구(b)와 주유동(M) 냉매 유입구(a)가 연결되는 부위는 냉매가 유출되는 방향으로 굽은 벽면을 갖는 슬릿(e) 형상으로 형성됨이 바람직하다.In addition, the portion where the suction flow (s) refrigerant inlet (b) and the main flow (M) refrigerant inlet (a) is connected is preferably formed in the shape of a slit (e) having a wall surface bent in the direction in which the refrigerant flows out.

뿐만 아니라, 축냉저장고(200)에는 냉매와 직접 열교환하여 냉기를 축적하는 축냉재가 내장되어 있고, 이 축냉재는 냉각수와 열교환할 수 있도록 설치되어 있기 때문에 순환펌프(300)가 구동되면 실내에 있는 축냉열교환기인 축냉열교환기(310)로 냉각수가 유입, 순환되면서 주행중 정차시 냉기를 공급할 수 있게 된다.In addition, the cold storage 200 has a built-in coolant to accumulate cold air by directly heat-exchanging with the refrigerant, the coolant is installed so as to exchange heat with the coolant, so that the circulation pump 300 is in the room Cooling water flows into the cold storage heat exchanger 310, which is a cold storage heat exchanger, and can supply cold air when the vehicle is stopped while driving.

특히, 앞서 설명한 바와 같이, 상기 이젝터(140)는 곡률반경(R)에 의해 노즐 유속이 결정되기 때문에 흡입유동(s)을 쉽게 조절할 수 있는 장점도 있다.In particular, as described above, the ejector 140 has an advantage that the suction flow (s) can be easily adjusted because the nozzle flow rate is determined by the radius of curvature (R).

이와 같이, 본 발명에 따른 축냉시스템은 차량 에어컨 시스템에서 냉매를 분기하여 구현되는 것으로, 이는 코안다 효과를 갖는 이젝터(140)를 팽창밸브(130)와 증발기(100) 사이에 설치함으로써 가능하게 된다.As such, the cold storage system according to the present invention is implemented by branching a refrigerant in a vehicle air conditioner system, which is possible by installing an ejector 140 having a coanda effect between the expansion valve 130 and the evaporator 100. .

그리하여, 차량 에어컨 시스템 보다 낮은 압력 및 온도의 냉매로 축냉시스템을 작동시킬 수 있어 축냉효율이 우수하고, 축냉성능이 기존 보다 월등히 향상된다.Thus, the cold storage system can be operated with a refrigerant having a lower pressure and temperature than the vehicle air conditioner system, so that the cold storage efficiency is excellent, and the cold storage performance is significantly improved than before.

더구나, 상기 코안다 효과를 갖는 이젝터(140)는 축냉시 열부하가 큰 경우 증발기(100) 쪽으로도 냉매를 많이 공급해야 하므로 팽창밸브(130)를 통해 냉매 유량이 증가되게 되고 동시에 분기된 축냉저장고(200) 쪽으로도 냉매 공급량이 늘어나게 되며, 충분히 축냉된 후에는 축냉쪽 열부하가 줄어들게 되고 동시에 증발기(100) 쪽도 열부하가 줄어들게 되므로 이젝터(140)로 유입되는 냉매량이 열부하가 많을 때에 비해 상대적으로 줄어들게 되므로 코안다 효과를 갖는 이젝터(140)를 통해 열부하에 따른 냉매의 유량 제어도 가능하게 된다.Moreover, the ejector 140 having the coanda effect has to supply a lot of refrigerant to the evaporator 100 when the heat load is large during the cold storage, so that the refrigerant flow rate is increased through the expansion valve 130 and at the same time, the cold storage compartment branched ( Refrigerant supply amount is also increased to 200), and after sufficient cooling, the heat load on the cold storage side is reduced, and at the same time, the heat load on the evaporator 100 is also reduced, so the amount of refrigerant flowing into the ejector 140 is relatively reduced compared to when the heat load is large. Through the ejector 140 having a coanda effect, the flow rate control of the refrigerant according to the heat load is also possible.

도 1a 및 도 1b는 종래 기술에 따른 축냉시스템을 보인 요부 구성도,1a and 1b is a main configuration diagram showing a cold storage system according to the prior art,

도 2는 본 발명에 따른 축냉시스템이 구축된 차량용 공조장치의 냉각사이클을 보인 회로도,Figure 2 is a circuit diagram showing a cooling cycle of the vehicle air conditioning apparatus is built-up a cold storage system according to the present invention,

도 3은 본 발명에 따른 축냉시스템에 사용되는 이젝터를 보인 예시적인 모식도.Figure 3 is an exemplary schematic view showing an ejector used in the cold storage system according to the present invention.

♧ 도면의 주요 부분에 대한 부호의 설명 ♧♧ description of the symbols for the main parts of the drawing ♧

100....증발기 110....압축기100 ... evaporator 110 ... compressor

120....응축기 130....팽창밸브120 Condenser 130 Expansion valve

140....이젝터 200....축냉저장고140..Ejector 200 .... Cold Storage

300....순환펌프 310....축냉열교환기300 .. Circulation pump 310 .... Cold storage heat exchanger

Claims (7)

압축기(110), 응축기(120), 팽창밸브(130), 증발기(100)를 순환하는 냉매 일부를 저장하여 축냉하는 축냉저장고(200)를 포함하는 차량용 공조장치에 있어서;In the vehicle air conditioning apparatus including a compressor 110, a condenser 120, expansion valve 130, a storage cold storage 200 for storing and storing the refrigerant circulating through the evaporator (100); 상기 팽창밸브(130)와 증발기(100) 사이에는 이젝터(140)가 더 설치되어, 상기 팽창밸브(130)를 거쳐 감압 및 감온된 냉매가 상기 이젝터(140)를 통해 상기 증발기(100) 및 축냉저장고(200)로 공급되도록 한 것을 특징으로 하는 차량용 공조장치.An ejector 140 is further installed between the expansion valve 130 and the evaporator 100, and the refrigerant decompressed and reduced in temperature through the expansion valve 130 is cooled through the ejector 140 and the cold storage. Vehicle air conditioning apparatus, characterized in that to be supplied to the reservoir (200). 청구항 1에 있어서;The method according to claim 1; 상기 이젝터(140)는 코안다 효과를 이용한 코안다 이젝터인 것을 특징으로 하는 차량용 공조장치.The ejector 140 is a vehicle air conditioner, characterized in that the coanda ejector using the Coanda effect. 청구항 2에 있어서;The method according to claim 2; 상기 이젝터(140)는 노즐(142)의 출구측 벽면의 곡률반경(R)을 가변시키는 것에 의해 축냉성능 및 축냉효율을 제어할 수 있는 것을 특징으로 하는 차량용 공조장치.The ejector 140 is a vehicle air conditioner, characterized in that by controlling the curvature radius (R) of the outlet side wall surface of the nozzle (142) can control the cold storage performance and the cold storage efficiency. 청구항 1에 있어서;The method according to claim 1; 상기 축냉저장고(200)는 상기 이젝터(140)와 증발기(100) 사이의 냉매파이 프(P1)에서 분기되고, 상기 이젝터(140)의 흡입측으로 연결된 냉매파이프(P2)에 의해 별도의 냉매순환유로가 구성된 것을 특징으로 하는 차량용 공조장치.The cold storage 200 is branched from the refrigerant pipe P1 between the ejector 140 and the evaporator 100 and separated by a refrigerant pipe P2 connected to the suction side of the ejector 140. Vehicle air conditioning apparatus, characterized in that the configuration. 청구항 1에 있어서;The method according to claim 1; 상기 축냉저장고(200)에는 축냉재와 열교환되는 냉각수가 흐르는 냉각수파이프(P3)가 배관되고, 상기 냉각수 파이프(P3)의 일부에는 순환펌프(300) 및 축냉열교환기(310)가 설치되어 폐회로를 구성하는 것을 특징으로 하는 차량용 공조장치.The cold storage 200 is piped with a cooling water pipe (P3) through which the coolant to be heat-exchanged with the cold storage material, and the circulation pump 300 and the cold storage heat exchanger (310) are installed in a portion of the cooling water pipe (P3) to close the closed circuit. Vehicle air conditioner, characterized in that the configuration. 청구항 1 또는 청구항 2에 있어서;The method according to claim 1 or 2; 상기 이젝터(140)의 주유동(M) 냉매 유입구(a)는 팽창밸브(130)와 연결됨과 아울러 이젝터(140)의 흡입유동(s) 냉매 흡입구(b)는 축냉저장고(200)와 연결되며, 상기 이젝터(140)의 출구(c)는 증발기(100)와 연결되도록 설치된 것을 특징으로 하는 차량용 공조장치.The main flow (M) of the ejector 140 of the refrigerant inlet (a) is connected to the expansion valve 130 and the suction flow (s) of the ejector (140) of the refrigerant inlet (b) is connected to the cold storage 200 The outlet (c) of the ejector (140) is a vehicle air conditioning apparatus, characterized in that installed to be connected to the evaporator (100). 청구항 6에 있어서;The method according to claim 6; 상기 흡입유동(s) 냉매 흡입구(b)와 상기주유동(M) 냉매 유입구(a)의 연결 부분은 냉매의 유출방향으로 굽은 벽면을 갖는 슬릿(e) 형상으로 형성된 것을 특징으로 하는 차량용 공조장치.The connection portion between the suction flow (s) refrigerant inlet (b) and the main flow (M) refrigerant inlet (a) is formed in the shape of a slit (e) having a wall surface curved in the outflow direction of the refrigerant. .
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CN110081629A (en) * 2019-05-31 2019-08-02 中国科学技术大学 A kind of multi-mode CO2Cogeneration cooling heating system

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