Movincool Office Pro 10 Service Manual download pdf (Page 18)

REFRIGERANT SYSTEM

10

SPRING

DISCHARGE

HOLE

DISCHARGE

VALVE

SHAFT

ROLLER

SUCTION

HOLE

BLADE

CYLINDER

Compressor Operation

1. Compressor

The compressor used for the unit is hermetically

sealed. The compressor and the compressor

motor are in one casing.

A. Compressor Construction

The construction of a rotary type compressor

is divided into two mechanisms. The drive

mechanism (compressor motor) and the

compression mechanism (compressor). When

the rotor shaft of the motor (drive mechanism)

turns, the roller of the compressor (compres-

sion mechanism) 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 dis-

charge side. This design prevents the back-

ward flow of discharge gas.

2. Condenser

The condenser is a heat exchanger with copper

tubes that are covered with thin aluminum plate

fins. Heat is given off and absorbed by air being

pulled across the condenser fins by the centrifu-

gal fan and then expelled through the exhaust air

duct.

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