Movincool Classic Plus 14, Service Manual

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REFRIGERANT SYSTEM
10
2. Compressor
The compressor used for the unit is hermeti-
cally sealed. The compressor and the com-
pressor motor are in one casing.
A. Compressor Construction
The construction of a rotary type com-
pressor is divided into two mechanisms -
the drive mechanism (compressor motor)
and the compression mechanism (com-
pressor). When the rotor shaft of the
motor (drive mechanism) turns, the roller
of the compressor (compression mecha-
nism) rotates to compress the refrigerant.
B. Basic Compressor Operation
The roller (compression mechanism) is set
eccentrically with a certain distance given
from the axis of the center of the cylinder.
A spring loaded blade is mounted on the
cylinder. The roller turns to compress the
refrigerant in the space between the
cylinder and eccentrically mounted roller.
The blade is in contact with the roller by
means of spring force. It partitions the
space between the suction side and the
discharge side to keep compressed
refrigerant from returning to the suction
side.
There is no suction valve. The discharge
valve is designed not to open until the
pressure of the refrigerant within the
cylinder reaches or exceeds that of the
refrigerant on the discharge side. This
design prevents the backward flow of
discharge gas.
3. Condenser
The condenser is a heat exchanger with
copper tubes that are covered with thin
aluminum projections called spine fins. Heat
is given off and absorbed by air being pulled
across the condenser fins by the centrifugal
fan and then expelled through the exhaust air
duct.
Compressor Operation