Movincool OP60 Manuale Di Servizio

12

Capillary Tube

Modulating Tank

Capillary Tubes
The capillary tubes are long thin tubes utilizing
line flow resistance to serve as an expansion
valve. The length and the inner diameter of the
capillary tubes are determined by the capacity of
the refrigeration system, specified operating
conditions, and the amount of refrigerant.

The capillary tubes cause the high pressure, high
temperature liquid refrigerant sent from the
condenser to expand rapidly as the refrigerant is
sprayed out through the fixed orifice in the
capillary tubes. As a result, the temperature and
state of the refrigerant become low and mist-like
respecitively, causing it to evaporate easily.

Evaporator
The evaporator, like the condenser, is a heat
exchanger utilizing plate fins. Heat is removed
from the air being pulled across the evaporator
by the centrifugal fan and the resulting cool air is
expelled through the cool air vent.

Modulating Tank
The modulating tank consists of a copper pipe
and tank sections, each being separated from the
other. The pipe connects to the evaporator outlet
at one end and to the compressor at the other;
the tank connects to the evaporator inlet. The
modulating tank is covered with insulation to
reduce thermal effects of ambient temperature. It
varies the quantity of refrigerant in the refrigerat-
ing cycle for optimum operating condition; it
stores part of refrigerant under light load and
delivers additional refrigerant to the cycle under
heavy load.