• Title/Summary/Keyword: Automotive air conditioner

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A Study of Failure Examples for Refrigerant Gas Leakage in Automotive Air Conditioner System (자동차 에어컨 냉매 가스 누설에 대한 고장사례 고찰)

  • Lee, Il Kwon;Kook, Chang Ho;Moon, Hak Hoon;You, Chang Bae
    • Journal of the Korean Institute of Gas
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    • v.20 no.2
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    • pp.10-15
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    • 2016
  • This paper is to analyze and study the failure examples of refrigerant gas in automotive air conditioner. The first example, the air conditioner compressor continually operated that the refrigerant was leaked in air conditioner system. By lubrication shortage, the piston was partially sticked on cylinder of air conditioner compressor inner part. This was caused the phenomenon of engine operation trouble by load increasing with engine rpm variation during engine running. The second example, it sought the fact that the air conditioner refrigerant gas was leaked from air conditioner compressor to condenser high pressure pipe toward rear air conditioner checking with the lines of air conditioner. The third example, the refrigerant gas of air conditioner found that was leaked imperceptible from condenser inner by crack that was generated on the fins of air conditioner condenser. Therefore, the air conditioner system that maintain the air conditioner by decreasing the in-car temperature must meticulously manage to not leak the air conditioner refrigerant gas.

Finite Element Analysis of Swaging Process for Manufacturing of Automotive Air-Conditioning Hose (자동차용 에어콘 호스 제조를 위한 스웨이징 공정 유한요소해석)

  • Min, Kyu-Young;Kim, Tae-Beom;Park, Yong-Bok
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.9 no.5
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    • pp.1102-1106
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    • 2008
  • It's necessary to invent a measure to deal with expected counter results when observing mechanical behaviors under the various operations and it can be done by measuring the stress and deformation characteristics of the Automotive Air-Conditioner Hose, which is a hose made up of a rubber hose, an aluminum sleeve and pipe. In this paper, characteristics of the stress and deformation characteristics of the Automotive Air-Conditioner Hose which plays an important role in circulation of refrigerant of an air conditioner in an automobile are analyzed using the finite element method.

A Study on the Application of Thermoelectric Module in the Air Conditioner System Using Automotive (차량용 냉방시스템에의 열전소자 적용에 관한 연구)

  • Kim, S.H.
    • Journal of Power System Engineering
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    • v.12 no.4
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    • pp.32-38
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    • 2008
  • The improvement of cooling ability for the air conditioner is the most efficient method of application of its system. Therefore, this study has been investigated the improvement of cooling ability for the air conditioner using automotive by attached of a thermoelectric module. According to the result of test, capacity of the thermoelectric module make temperature range from $-75^{\circ}C$ to $+300^{\circ}C$ possible to cooling and exothermic. In addtion to, the reduction effect of energy revealed and the effect of liquid hammer remained with safety by attached the thermoelectric module. It was found that the air conditioner system by attached thermoelectric module have better cooling ability than the air conditioner system of existing vehicle.

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Experimental Studies on the Stack Cooling Performance Using a $CO_2$ Air Conditioning System in Fuel Cell Vehicles (이산화탄소 에어컨 시스템을 이용한 연료전지 자동차의 스택 냉각성능에 대한 실험적 연구)

  • Kim, Sung-Chul;Kim, Min-Soo;Won, Jong-Phil
    • Transactions of the Korean Society of Automotive Engineers
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    • v.16 no.3
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    • pp.87-93
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    • 2008
  • The $CO_2$ air conditioning system installed in fuel cell vehicles could be used either for stack cooling or for cabin cooling, and thus was used for the stack cooling when additional stack heat release was required over a fixed radiator capacity for high power generation. This study investigated the performance of the stack cooling system using $CO_2$ air conditioner at various operating conditions. Also, the heat releasing effectiveness and mutual interference were analyzed for the stack cooling system using an air conditioner and compared with the conventional radiator cooling system with/without cabin cooling. The heat release of the stack cooling system with the aid of $CO_2$ air conditioner increased up to 36% more than that of the conventional radiator cooling system with cabin cooling. Furthermore, the heat release of the stack cooling system using $CO_2$ air conditioner increased more by 7% than that of the conventional radiator cooling system without cabin cooling.

A Study on the Component Performance for Automotive Air Conditioner (자동차용 에어컨의 단품 성능에 관한 연구)

  • 이대웅;유성연
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.14 no.4
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    • pp.293-303
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    • 2002
  • For successful design of component, performances of one-tank plate type evaporator, gas-liquid separation type condenser, swash plate type compressor and thermostatic expansion valve for automotive air conditioner are investigated experimentally. Heat transfer characteristics in the evaporator are examined by means of air temperature, relative humidity, air volume flow, outlet refrigerant pressure and superheat, and heat transfer characteristics in the condenser are examined by means of air temperature, air velocity and inlet refrigerant pressure. Pressure drops for both evaporator and condenser are measured arid empirical correlations are derived. Volumetric efficiencies and isentropic efficiencies for trio types of compressors with different capacity are measured and compared. Thermostatic expansion valve is tested to investigate the pressure variation according to temperature changes.

Development of the Anti-Start Air Conditioner Compressor Resonant DC/DC Converter for Commercial Vehicle (상용차를 위한 무시동 에어컨 압축기용 공진형 DC/DC 컨버터 개발)

  • Han, Keun-Woo;Kim, Seong-Gon;Jung, Young-Gook;Lim, Young-Cheol
    • The Transactions of the Korean Institute of Power Electronics
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    • v.19 no.6
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    • pp.557-563
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    • 2014
  • This study deals with a resonant converter of an anti-start air conditioner compressor for commercial vehicles. The anti-start air conditioner compressor must generally have a high current, high efficiency, a low volume, and a low weight. To reduce the switching losses and voltage and current stresses of the device, the anti-start air conditioner compressor applies the full-bridge L-C resonant converter topology. Hardware parameters are designed to have a wide voltage range, and the switching frequency range of the L-C resonant converter is determined. Simulation is implemented using PSIM and an experiment is performed to verify the proposed converter.

Development of Simulation Program of Automotive Engine Cooling System (자동차 엔진냉각계의 해석 프로그램의 개발)

  • 배석정;이정희;최영기
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.11
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    • pp.943-956
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    • 2003
  • A numerical program has been developed for the simulation of automotive engine cooling system. The program determines the mass flow rate of engine coolant circulating the engine cooling system and radiator cooling air when the engine speed is adopted by appropriate empirical correlation. The program used the method of thermal balance at individual element through the model for radiator component in radiator analysis. This study has developed the program that predicts the coolant mass flow rate, inlet and outlet temperatures of each component in the engine cooling system (engine, transmission, radiator and oil cooler) in its state of thermal equilibrium. This study also combined the individual programs and united into the total performance analysis program of the engine cooling system operating at a constant vehicle speed. An air conditioner system is also included in this engine cooling system so that the condenser of the air conditioner faces the radiator. The effect of air conditioner to the cooling performance, e.g., radiator inlet temperature, of the radiator and engine system was examined. This study could make standards of design of radiator capacity using heat rejection with respect to the mass flow rate of cooling air. This study is intended to predict the performance of each component at design step or to simulate the system when specification of the component is modified, and to analyze the performance of the total vehicle engine cooling system.

Performance Evaluation of a Parallel Flow Condenser for Automotive Air Conditioners (자동차 에어컨용 평행류 응축기의 성능평가)

  • 장혁재;강병하
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.15 no.4
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    • pp.247-253
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    • 2003
  • The new shape of louver-fin has been applied to a parallel flow condenser to enhance air-side heat transfer rate lot an automotive air-conditioner R- l34a is employed as a refrigerant inside the flat tube of the condenser, This problem is of particular interest in reducing the geometric size of the automotive air conditioner The effect of air flow rate on pressure drop as well as heat transfer in air side are studied in detail. Comparison of the performance is also made with that of a conventional parallel flow condenser, which is available in the market. The results obtained indicate that the total pressure drop through the pre sent condenser is not changed, while the heat transfer rate is increased by 24% at high veto city of air flow, compared with those of the conventional condenser. The parallel flow condenser with a new shape of louver-fin could be reduced in size by 20% for the equivalent condenser capacity, compared with the conventional parallel flow condenser.

A Study on the Simulator and Trouble Prediction Monitoring Methodology of the Automotive Air Conditioner (자동차 공조기의 시뮬레이터 및 고장예측 모니터링 기술에 관한 연구)

  • Son, Il-Moon;Kwak, Hyo-Yean
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.4
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    • pp.1568-1575
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    • 2013
  • There has been an increasing interest in the market of vehicle maintenance and repair equipments to decrease air pollution. However, most of the existing air conditioning system equipment in Korea have poor performance as well as non-protection against air pollution. The purpose of this paper is to develop the monitoring technology of recovering and recharging refrigerant for air conditioning system, and also to develop its related diagnostic system. This technology and system can supply the exact amount of refrigerant from the charger to the air conditioning system by precisely diagnosing and monitoring their statuses. This technology can also control recovering and recharging of refrigerant exactly by altering the recovering pressures of refrigerant according to circumstance temperatures.