Air Conditioning

AIR CONDITIONING (OPTIONAL)

The present vehicle can be optionally provided with an air conditioning.




MAJOR COMPONENTS AND REFRIGERANT FLOW OF AIR CONDITIONING SYSTEM

FUNCTION OF EACH COMPONENT

COMPRESSOR
Compresses the gas vaporized in the evaporator.
Thus compressed gas is sent to the condenser where it is changed into liquid refrigerant whose heat of vaporization can be reused. Compressors used for the air conditioning of vehicle include reciprocating-, vane rotary-, swash plate-, and wobble plate-types. This model employs the vane rotary-type less in vibration and excellent in durability.

MAGNETIC CLUTCH
A device used, with the engine running, for operating the compressor only when the air conditioning is needed and stopping it otherwise.
Employs a powerful electromagnet.

CONDENSER
Serves to change the compressor-compressed, high temperature/high pressure-obtained refrigerant into liquid refrigerant by forcibly taking heat therefrom. Constructionally the same as the radiator. Installed at the front most of the vehicle for increased heat radiation, and cooled compulsorily by the cooling fan.

RECEIVER/DRYER




The receiver/dryer has the three roles as described below:
A. The receiver serves as a temporary storage container of condenser-liquefied refrigerant so that it is possible to supply the evaporator with the condenser-liquefied refrigerant just conforming to the demand of the cooling load.
B. The dryer serves to remove the dirt and water mixed in the cycling refrigerant by means of the filter and desiccant sealed therein.
C. The sight glass, installed atop the receiver, serves to look at thereby the flowing state of the refrigerant.

DUAL PRESSURE SWITCH
A control switch to stop further rotation of the compressor by turning OFF the electric circuits of the magnetic clutch and condenser cooling fan when the cycling refrigerant is abnormally dropped or risen in pressure.




EXPANSION VALVE
A device to eject the receiver/dryer-passed liquid refrigerant from fine holes for sudden expansion to produce atomized refrigerant of low temperature and low pressure.

EVAPORATOR
Passes there through the cold atomized refrigerant to lower the ambient temperature. The refrigerant, now changed into hot gas, is sent to the compressor. Functionally, the evaporator acts just inversely to the condenser.
(The refrigerant takes a state of liquid when entering the evaporator and a state of gas when leaving therefrom.)