In recent years, Hanbell has launched LB, LB-PLUS series low temperature screw refrigeration compressor based on the integrated application experience in low temperature field and customer demand. In order to further expand the application field and reliability of products, LBII-PLUS series compressors are specially developed. LBII-PLUS series compressors continue to use the automatic control function of LB-PLUS. On the premise of ensuring intelligent application, LBII-PLUS series further optimize the motor cooling control logic and cooling structure, improve the safety margin of LBII-PLUS, and further expand the operation range, so that LBII-PLUS can meet the application requirements of air-cooled system. At the same time, it further improves the performance, so that LBII-PLUS can be widely used in refrigeration, industrial process cooling, freeze-drying and other fields with sufficient competitiveness. In general, LBII-PLUS is a new elite product of Hanbell in the low temperature application field.