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OPERATION AND MAINTENANCE MANUAL FOR FOTON VIEW SERIES LIGHT BUS
·264· During vaporization, it absorbs the heat from surrounding air.
Fig.11-11 shows the basic process of a refrigeration cycle: flow direction, high pressure or low pressure, and the status of refrigerant.
In Fig.11-11, the refrigeration cycle is divided into two sides, i.e. high pressure and low pressure sides, by the line between compressor and expansion valve, with the right side being the low pressure side, while the left side being the high pressure side.
Figure 11-11 Refrigeration Cycle
2. Structure & Function Vehicle air-conditioning system includes compressor, condenser, reservoir dryer, expansion valve, and evaporator, etc. What’s shown in figure 11-12 is the refrigeration cycle of air conditioning system of BJ6536.
Figure 11-12 Refrigeration Cycle System Evaporator: The warm airflow sent from the cab by the fan flows through the radiator fin and tube of the evaporator (See Figure 11-13), and the low-temperature and low-pressure refrigerant flowing from the expansion valve absorbs large amount of heat from the warm airflow when it enters the radiator and tube of the evaporator, and thus turns into refrigerant gas. This process can cool down the warm airflow flowing through the evaporator, and thus lowers the temperature within the vehicle. When the warm airflow flows through the evaporator, the moisture in it will be condensed into drips on the radiator, the dust in water and air can be drained out from vehicle through the discharge outlet.
High Pressure Side
Low Pressure Side
Condenser
Heat radiated outdoors
Evaporator
Indoors heat taken away
Expansion Valve Compressor
Compressor
Low-Pressure Switch reservoir dryer High-Pressure Heat Control Switch
Expansion Valve Evaporator
Cooling Unit
Condenser
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