11 Copyright by Goodheart-Willcox Co., Inc. Aft er studying this chapter, you will be able to: • Explain the purpose of heating, ventilation, and air conditioning systems. • Identify the components of a vehicle air conditioning system and state their purpose. • Explain the basic operation of an air conditioner refrigeration system. • Name the two major types of refrigerant used in automotive air conditioning. • Identify the components of a vehicle heating system and state their purpose. • Explain the basic operation of a heating system. • Identify the components of a vehicle ventilating system and state their purpose. • Explain the basic operation of a ventilation system. • Trace the development of modern heating, ventilation, and air conditioning systems. • Discuss the environmental eff ects of certain types of refrigerants. accumulator A/C mode actuator antifreeze blend door blower bulkhead case chemically stable compressor condense condenser coolant coolant pump cooling mode cooling system cowl defog mode defrost mode dehumidify desiccant diverter door driver duct ductwork ethylene glycol evaporation evaporator expansion valve fi rewall fi xed orifi ce fl ow restrictor heater core heater shutoff valve heat exchanger heating mode heat mode HVAC intake max A/C mode maximum cooling mode mineral oil mirror defroster muffl er ozone layer polyalkylene glycol (PAG) polyol ester (POE) propylene glycol radiator ram air rear window defroster receiver-drier refrigerant refrigeration system seat heater sight glass squirrel cage blower thermostat vent ventilation mode vent mode water jacket Technical Terms Chapter 1 Introduction to Automotive Heating, Air Conditioning, and Ventilation