Working cycle
The circulation of the refrigerant is carried out according to the standard scheme. The compressor pumps the refrigerant vapor into the condenser, where it condenses and releases heat to the condenser walls. From the condenser, the liquid refrigerant flows into the tank, from where it enters the evaporator under the action of the vacuum created by the compressor. Evaporating, the refrigerant lowers the temperature of the evaporator walls. The refrigerant vapor is returned to the compressor.
The flow of refrigerant through the evaporator is controlled by an expansion valve located in the evaporator body.
Temperature control
The compressor operates in intermittent mode, keeping the evaporator temperature within a certain range. When the temperature drops below the set value, the thermostat stops the compressor. When the temperature rises, the thermostat switches the compressor back on.
Air conditioning protection
High and low pressure sensor. It is a switch located on the refrigerant tank. If the system pressure is out of normal range, the switch opens, disengaging the compressor clutch.
Fusible plug. Breaks at temperatures above 105°C, releasing the refrigerant into the atmosphere. If you find that the plug is melted and open, check the A/C system and replace the reservoir.