汽车专业英语 教学课件 ppt 作者 廖忠诚 杨晓波 主编Chapter7 Heating and Air Conditioning.pptVIP

* 化学工业出版社 Chapter 7 Heating And Air-Conditioning 7.1 Descripion 7.2 Inspection Process and Service 7.1 Descripion 7.1.1 Function Air Conditioning (A/C) system has such functions as follows : (1) Reduce the temperature inside the car to keep passenger cool in hot day; (2) Heating air inside the car to get passenger warm in cold day; (3) Make the air of the car’s interior clean and dehumidifies; (4) Let fresh outside air enter into the passenger compartment at the desired speed. 7.1.2 System Components Air conditioning system mainly consists of compressor (with a magnetic clutch), condenser and electric fan, receiver, blower unit, cooling unit (with an evaporator and an expansion valve), heater unit, heater control assembly, A/C amplifier, idle-up device, suction hose, discharge hose, air conditioning relay and sensors, etc. Its main parts location is shown in Fig. 7-1. dehumidify 除湿 passenger compartment 车厢 compressor 压缩机 condenser 冷凝器 receiver 贮液器 blower unit 通风装置 cooling unit 冷却装置 evaporator 蒸发器 expansion valve 膨胀阀 heater unit 暖风装置 A/C amplifier 空调放大器 idle-up 怠速提升 suction hose 吸气管 discharge hose 排气管 relay 继电器 engine compartment No.1 relay box 发动机室1号继电器盒 receiver 贮液器 solar sensor 日光传感器 heater core 加热器芯 evaporator 蒸发器blower motor 鼓风机电机 7-1 Air Conditioning System Main Parts Location 1—electric fan 2—condenser 3—pressure switch 4—compressor 5—water valve 6—evaporator pressure regulator 7—engine compartment No.1 relay box 8—engine compartment No.2 relay box 9—engine coolant temperature switch 10—receiver 11—ambient temperature sensor 12—solar sensor 13—air passage sensor 14—air conditioner control assembly 15—room temperature sensor 16—A/C amplifier 17—expansion valve 18—heater core 19—evaporator 20—blower motor 21—blower motor relay 7.1.3 The Cooling Process The cooling process of the air conditioning system is shown in Fig. 7-2. The compressor sucks the refrigerant vapor（low temperature and low pressur