Figure 5. Expansion valve
1. Expansion valve
2. Hose from condenser
3. Inlet pipe to evaporator
4. Outlet pipe from evaporator
5. Hose to compressor suction side
From condenser
To evaporator
From evaporator
To compressor
Temperature sensor
When the compressor starts pressure drops in the evap-
orator and the diaphragm pushes the pin downwards and
the ball opens. Refrigerant can now flow via the spring
housing into t he evaporator
When the temperature in the evaporator outlet pipe
lowers , the temperature sensor pulls the diaphragm
upwards and the valve ball c l oses preventing refrigerant
from flowing into the evaporator.
In this way the expansion valve regulates all the time the
amount of refrigerant in the evaporator.
On the later air conditioner, the expansion valve funct i ons
in a similar way.
Note! Theexpansionvalveandthemetalpipeshave
been covered with insulating mass 30794000.
Diaphrag m
1141
Model Code Page
83. Air conditioner
1. 1. 1994
6000--8750 830 7
Expansion valve
1
2
3
4
5
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