3. STRUCTURE OF SCREW CHILLER
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Screw compressor
Oil recovery eductor
Evaporator
Condenser
Oil line
Oil is gathered in the lower part of the compressor casing while all the oil needed for bearings and capacity control is
filtered by passing through the oil filter. After removing the foreign material the oil is sprayed to the bearings after
passing through the internal oil passage, while at the same time sprayed to the capacity control piston after passing
through the capillary in the outside. Oil flows through the capacity control solenoid valve and is discharged to the
compressor inlet side and absorbed into the rotor groove to lubricate the two rotors. The oil moved into the bearings
at the rear side returns to the inlet side.
The oil level of the compressor should be kept at a proper level during the compressor operation, and if the oil
amount is not enough, the oil should be added to the oil tank. If oil amount is insufficient, abrasion occurs at bearings
and rotor, which is the cause of the compressor damage. Oil filter which is to filter the foreign material in oil is easily
disassembled for cleaning.
Oil is filled inside of the compressor.
Depending upon the customer’s need, a different type of oil can be used, but in this case, the following items should
be followed.
- Use of a new oil should be consulted with LG Electronics first.
- The oil inside the compressor should be cleaned before filling the new oil.
- Different types of oil should not be blended together for use.
- After filling the new oil, the moisture content in the oil should be removed by a sufficient vacuum operation.
Oil recovery system
Figure 13 Oil recovery system(1 cycle)
ENGLISH
Summary of Contents for LCWW
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