Function And Construction - Kubota KX080-3 Workshop Manual

WSM KX080-3 Mechanism

(3) Function and construction

Air conditioner body assembly
In general it is a component part to blow cold air into
the cabin.
Temperature sensor tube
It is used to sense the temperature at the outlet
of the evaporator and automatically adjust the
opening of the expansion valve.
Low-pressure and low-temperature gas
The pressure and temperature ranges during normal operation
are shown below for reference.
Temperature: 70 to 120°C
Pressure: 12 to 16 kg/cm
Compressor
The compressor driven by the engine through the V-belt is used to
turn the evaporated refrigerant into high-pressure (high-temperature)
gas and send it to the condenser. The magnet clutch attached to it
can be used to stop the compressor at any time.
Condenser
The high-pressure and high-
temperature refrigerant is
cooled to the condensation
temperature and turned into
high-temperature liquid by
means of airflow produced
through the operation of the
cooling fan installed in front of
the radiator and the running
of the vehicle.
High-pressure and high-temperature liquid
Cooling the refrigerant to this extent will turn it into liquid.
Gas
0
Gauge pressure
Cold air supply opening
Gas filling
Low-pressure and low-
temperature liquid
2
G
Engine cooling fan
Condensation
Liquid
ote : alues of temperature an pressure in belo
are not specifications but ust sample ata.
Evaporator
The atomized refrigerant evaporates to turn
into gas while drawing heat from the surround-
ings through the cooling fin.
Evaporation
Blower motor
It is used to pressurize and send cabin air to the
evaporator and to send cooled air to the cabin.
Expansion
Expansion valve
It is used to expand the refrigerant rapidly to turn it into
low-pressure and low-temperature liquid (atomized liquid).
Discharge
Magnet clutch
Sight glass and moisture indicator
High-pressure and
high-temperature
gas
70°C to 120°C
Receiver dryer
It is used to cleanse the high-pressure and high-
Temperature:
temperature liquid of residual moisture and con-
50°C to 60°C
taminants and send it to the expansion valve.
The characteristics of the refrigerant used so far are as
follows. When the gasified refrigerant is compressed to 15
2
kg/cm , its temperature becomes 70 C. Then, when the
refrigerant is cooled to less than 60 C (which means the
refrigerant emits 10 C or more of heat), it turns into liquid.
When the pressure is reduced to less than 2.14 kg/cm
turns back into gas at 0 C.
VI-M-5
VI Air Conditioner
Temperature: 8°C
to 15°C
Pressure: 1.0 to 2
Temperature:
kg/cm
50°C to 60°C
Low pressure side
(About 1/10 of high-
pressure side)
High-pressure and
Compression
high-temperature
liquid
50°C to 60°C
Suction
Dual pressure switch
High-pressure cut
Low-pressure cut
Drying agent
Fig.
2
2
, it