Composition and Working Principle
1)Composition of Air Conditioning System
Air conditioning system mainly includes refrigerating plant,ventilation plant,heat supply system,controller and air purifying device.
According to the composition structure characteristics,check for the faults of air conditioning system area by area,and the specific analysis is shown in Fig.3.56.
Fig.3.56 Analysis on the Faults of Air Conditioning System
Trouble shooting and elimination of CX70 air conditioning system is done mainly through cooling system and control system.
2)Working Principle of Air Conditioner Cooling System
Air conditioner cooling system is mainly made up of compressor,condenser,expansion valve,evaporation tank,blower and radiator fan,as shown in Fig.3.57.
(https://www.daowen.com)
Fig.3.57 Working Principle of Air Conditioner Cooling System(1)
The working principle of air conditioner cooling system,as shown in Fig.3.58.
Fig.3.58 Working Principle of Air Conditioner Cooling System(2)
(1)The compressor pumps away the refrigerant which absorbs a lot of heat inside the evaporation tank and changes the inside of evaporation tank into an area with low pressure and temperature.
(2)The refrigerant compressed by the compressor is changed into gas form with high pressure and temperature,which flows into condenser,which lowers its temperature and pressure and make it into liquid or mixture of liquid and gas.Then this form of refrigerant flows into the storage liquid drier to be stored and dried;liquid refrigerant flows to expansion valve with the system circulation.
(3)Due to the restrictive limitation of expansion valve,only a few refrigerant passes through expansion valve,and at this moment,due to the sudden reduction of pressure,the refrigerant begins to evaporate and flow into the evaporation tank.
(4)The refrigerant which flows into the evaporation tank continues to evaporate,and absorbs the heat in the air around the evaporation tank and then is sucked in by the compressor again.
According to the working principle,when the air conditioner cooling system operates,the compressor keeps sucking the refrigerant into the condenser and the expansion valve limits the amount of refrigerant into the evaporation tank,therefore,the circulation like this forms:compressor→condenser→storage liquid drier→expansion valve and its high pressure area→evaporation tank→low pressure area of compressor.