| 摘要 |
Disclosed are a method and apparatus for controlling and enabling a screw compressor to adapt to work environment, work characteristics or other conditions in a field, maximize electric energy savings and improve the performance of the screw compressor. The apparatus for controlling a screw compressor of the present invention comprises: a screw compressor that includes a suction valve being opened or closed by operations of a solenoid valve to suck in or block outside air, a motor run on an applied power to generate a torque of a predetermined rotational speed, a compressor compressing and then discharging the air having been sucked in through the suction valve under the influence of the motor torque, an oil separator separating and then discharging oil contained in the compressed air from the compressor, and an air feed line used for delivering air to the suction valve, motor, compressor and oil separator to which the line is piped, respectively; a control box that includes a pressure switch being switched according to a pressure detected by one or more pressure sensors installed in the air feed line piped into the screw compressor, and an inverter for controlling an operation of the motor by switching the pressure switch; and a receive tank for storing the compressed air flown in via the air feed line and then supplying the air to a field, wherein a drive control process is selectively performed by one of a Y-? start method, a pressure control method and a sequential control method so as to supply an optimum air demand required of the screw compressor at a field. |
