LB
II
-PLUS Technical Manual
6
1.6
Design Features
Electronic expansion valve
The LB
II
-PLUS adopts electronic expansion valve. Its precise control, stability in operation and
simplification control make compressors simpler, safer and more reliable.
Independent cooling of motor
It ensures that the motor runs at the ideal temperature, which effectively prolongs the life-time of
the motor. The harmful superheating of the suction refrigerant will no longer been increased. The
refrigerant after cooling the motor enters the compression chamber, so it will not cause the
cooling loss due to the cooling of motor, which achieves a higher energy efficiency ratio, especially
in the low temperature application.
Application design of single compressor and parallel connection
LB
II
-100~280-PLUS are divided into two structural forms: with oil separator and without oil
separator. LB
II
-360~410-PLUS have only one structure without oil separator. It can be applied to
various application fields, and different suction and discharge outlet directions can be selected.
The wiring part far away from the suction port to avoid affecting the electrical insulation
Compared with the normal low temperature screw compressor, the frosting phenomenon of the
electrical part is reduced, which improves the safety.
High efficiency multistage oil separator
Patented segmented high efficiency oil separator design ensures the lowest oil loss rate during the
compressor operation.
Optimization motor cooling
The motor cooling control logic of LB
II
is optimized and operation range is expanded to meet the
requirements of air-cooling applications.
Optimization of economizer connector
The connector of economizer is optimized, and the performance of LB
II
-PLUS with economizer is
improved compared with LB-PLUS.