COMPRESSOR, AND REFRIGERATING APPARATUS

摘要

There is provided a compressor that is capable of maximally utilizing effects of an economizer regardless of rotating speed of a screw rotor. A control unit 30 advances timing of opening of economizer ports EP1 to compression chambers 12 in accordance with increase in the rotating speed of the screw rotor 10. The economizer ports EP1 are opened earlier than complete closure of the compression chambers 12 in high-speed operation of the screw rotor 10, while the economizer ports EP1 are opened with delay in low-speed operation of the screw rotor 10.