Gas compressor

A gas compressor comprising:

• an electric motor;
• a compressor body that is driven by the electric motor and compresses a gas;
• a pressure sensor arranged on a delivery side of the compressor body;
• at least one of a suction throttle valve capable of closing a suction side of the compressor body and an air release valve capable of releasing gas from the delivery side of the compressor body;
• and
• a controller configured to switch between a load operation and a no-load operation by controlling at least one of the suction throttle valve and the air release valve according to a delivery-side pressure sensed by the pressure sensor, and also controls a rotation speed of the electric motor,
• wherein the gas compressor includes an input apparatus that accepts input of a capacity of an air supply system that supplies a compressed gas generated by the gas compressor to a use location of the compressed gas, and
• wherein the controller is configured to:
• set the target rotation speed of the electric motor at a time of no-load operation to a first value in a case where the capacity of the air supply system is smaller than a prescribed value, and
• set the target rotation speed of the electric motor at a time of no-load operation to a second value lower than the first value in a case where the capacity of the air supply system is equal to or greater than the prescribed value.