Electric compressor

An electric compressor comprising:

• a compression part configured to compress a refrigerant;
• an electric motor configured to drive the compression part;
• and
• a controller configured to control the electric motor, the controller including a motor information detector configured to detect a rotational speed and a power consumption of the electric motor, the controller being connected to a suction pressure sensor for detecting a suction pressure of the refrigerant to be drawn into the compression part and a discharge pressure sensor for detecting a discharge pressure of the refrigerant discharged from the compression part, wherein
• the controller includes:
• a memory for storing a map that indicates a correspondence between the suction pressure, the discharge pressure, the rotational speed, the power consumption, and dryness of the refrigerant to be drawn into the compression part;
• an estimator configured to estimate the dryness of the refrigerant based on the map using the rotational speed and the power consumption detected by the motor information detector, the suction pressure detected by the suction pressure sensor, and the discharge pressure detected by the discharge pressure sensor;
• and
• an operation controller configured to control an operation of the electric motor according to the dryness estimated by the estimator.