Scroll compressors, used in high-capacity equipment,
are manufactured with advanced technology, high energy efficiency and great
durability. The operating principle is the orbital movement produced by a movable scroll (snail) fitted to the shaft. Another scroll is attached to the housing and the fit between the two produces compression.
Scroll compressors are more resistant to splashing. The refrigerant sucked enters the compressor and occupies the shell, so the shell is at low temperature, after compressing the refrigerant in the form of steam at high temperature exits the discharge tube, with that the upper cap of the compressor is at high temperature.
Lubrication is done through a hollow shaft that, with the compressor running, conducts the oil to the holes located together with the bearings.
Scroll compressors have a high level of protection due to the presence of
following devices: floating seal, internal thermal protector, thermal disk TOD and
IPR valve.
- The floating seal has the function of avoiding the deep vacuum in the compressor. If that
the seal moves and the high and low pressures equalize;
- the internal thermal protector protects the compressor against temperature rise and
chain;
- the IPR valve opens when the pressure difference between suction and discharge
exceed 375 to 450psig, causing the hot gas to occupy the entire housing of the
compressor. As the temperature rises, the thermal protector switches off
compressor.
The compressor receives the refrigerant in the form of superheated steam at low
pressure and temperature and, through its mechanical work, raises the pressure
(compressing), discharging the refrigerant still in the form of superheated steam to the
high pressure and temperature.
