Electric compressor, control device, and monitoring method

An electric compressor comprising:

• a compressor which rotates around an axis to compress a fluid;
• a motor which rotatably drives the compressor around the axis;
• a control unit including a first component configured to convert power externally supplied thereto and a second component, which cooperate together to control current supply to the motor during driving, wherein
• when the first component and the second component are exposed to the same temperature, an allowable current of the second component is set to be smaller than an allowable current of the first component,
• an allowable temperature of the first component is higher than an allowable temperature of the second component,
• the second component is disposed in an upstream side of a refrigerant flow path than the first component such that the second component is disposed at a place in which a difference between the allowable temperature of the first component and the allowable temperature of the second component becomes smaller than a difference between a temperature of the first component and a temperature of the second component,
• a temperature sensor which detects the temperature of the first component;
• a current sensor which detects a current flowing through the first component;
• and
• a calculation unit which outputs an alarm signal when in the current of the first component is higher than the allowable current of the first component according to the temperature of the first component.