| 摘要 |
PROBLEM TO BE SOLVED: To provide a compressor having high energy-saving performance while keeping discharge temperature low, in controlling the rotational frequency of a cooling fan in the compressor.SOLUTION: In order that the detection temperature of lubricant is equal to or less than a preset reference temperature, the rotational frequency of a cooling fan for compressed air and lubricant is accelerated/decelerated. When shifted to load operation during control, the cooling fan accelerates at higher acceleration α than acceleration during control, and thereby suppresses abrupt temperature rise of discharged air. Consequently, discharge temperature is optimized and energy-saving performance is attained.SELECTED DRAWING: Figure 4 |
