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7-3. LEV
(1) Function
- It lowers the pressure of refrigerant, decreasing the temperature of the evaporator.
- It improves the efficiency of the compressor cycle.
- It adjusts the amount of refrigerant that flows into the evaporator.
(2) Operating Structure
※ Refrigerant Circulation Map
Condensed, liqueed refrigerant changes into a low tempera-
ture and low pressure state by the LEV. As the low temperature
and low pressure refrigerant passes through the evaporator, it
absorbs the heat of the air coming from outside and turns into
gas. Meanwhile, the temperature of outside air decreases as
the evaporator performs heat exchange. For the reference, the
temperature of the evaporator can be controlled by the LEV.
Air coming from the
outside
Hot air owing
to the outside
Condenser
Evaporator
Compressor
Expansion valve
(LEV)
Condenser
Compressor
Evaporator
High pressure
side
Low pressure
side
Expansion valve
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