Vehicular air conditioner

A vehicular air conditioner that allows a volume of outside air introduced into a vehicle cabin and a volume of inside air circulated to be varied and allows an inside air introduction rate, which is a ratio of the volume of inside air circulated in a volume of air blown into the vehicle cabin, to be adjusted, the vehicular air conditioner comprising:

• an inside air introduction rate controller;
• and
• an inside air introduction rate control prohibitor, wherein:
• in a situation where a temperature in a motor compartment is higher than a temperature of outside air;
• the inside air introduction rate controller is configured to perform an inside air introduction rate increasing control that changes the inside air introduction rate to be increased on a condition that there is no request for warming an inside of the vehicle cabin, the air conditioner is off, and air is being blown in an outside air introduction mode;
• and
• the inside air introduction rate control prohibitor is configured to prohibit the inside air introduction rate increasing control on a condition that there is a request for warming the inside of the vehicle cabin, the air conditioner is off, and air is being blown in the outside air introduction mode.