| 摘要 |
PROBLEM TO BE SOLVED: To provide an air compressor capable of obtaining energy-saving effect even when a use amount of compressed air is small.SOLUTION: An air compressor includes a compressor body compressing air, a motor for driving the compressor body, a storage tank for storing the compressed air compressed by the compressor body, and a control device for controlling a rotational frequency of the motor. The control device controls the motor so that the motor is driven when a pressure of the compressed air at the storage tank side becomes lower than a predetermined lower limit pressure Pon, the motor is stopped when the pressure of the compressed air at the storage tank side becomes higher than a predetermined upper limit pressure Poff0, and further the motor is stopped when a driving duration time of the motor is over a predetermined prescribed time T1, the compressed air pressure at the storage tank side becomes higher than a predetermined prescribed pressure Poff1 lower than the upper limit pressure Poff0 and higher than the lower limit pressure Pon. |
