Cooling device for electrically driven vehicle

A cooling device for an electrically driven vehicle, the cooling device configured to cool, by utilizing a coolant, an electric drive part mounted on a vehicle, the cooling device comprising:

• a compressor that compresses the coolant;
• a fan that draws outside air into a condensing device that condenses, by cooling, the coolant compressed by the compressor;
• an electric drive part temperature detector that detects a temperature of the electric drive part;
• a coolant pressure detector that detects a pressure of the coolant compressed by the compressor;
• and
• a controller that controls the compressor and the fan,
• wherein the controller:
• calculates a required cooling capability at least based on a detected result from the electric drive part temperature detector,
• calculates a set compressor rotational speed, which is a rotational speed of the compressor based on the required cooling capability, and
• calculates a set fan rotational speed, which is a rotational speed of the fan based on a detected result from the coolant pressure detector,
• wherein when both of a first condition that the set compressor rotational speed is equal to or less than a compressor rotational speed limit set in advance based on a predetermined noise regulation value and a second condition that the set fan rotational speed is equal to or less than a fan rotational speed limit set in advance based on the predetermined noise regulation value are satisfied, the controller actuates the compressor and the fan at the set compressor rotational speed and the set fan rotational speed, respectively,
• wherein when at least one of the first condition and the second condition is not satisfied, the controller sets a corrected compressor rotational speed such that noise generated with actuation of the compressor and the fan reaches the predetermined noise regulation value or less, and the controller sets a corrected fan rotational speed based on the corrected compressor rotational speed, and actuates the compressor and the fan at the corrected compressor rotational speed and the corrected fan rotational speed, respectively, and
• wherein the controller sets a lower value of the corrected fan rotational speed for a higher corrected compressor rotational speed,
• wherein the controller sets the corrected compressor rotational speed and the corrected fan rotational speed such that the generated noise reaches the predetermined noise regulation value.