High-voltage equipment cooling system for electric vehicle and high-voltage equipment cooling method for electric vehicle

A high-voltage equipment cooling system for electric vehicle comprising:

• a motor that drives an electric vehicle;
• a high-voltage equipment that is installed in the electric vehicle to supply power to the motor;
• a blowing means for high-voltage equipment that supplies cooling air to the high-voltage equipment;
• an outlet valve that opens and closes by the pressure difference between inside and outside of a vehicle compartment and discharges cooling air heat-exchanged with the high-voltage equipment out of the vehicle compartment;
• an air conditioning means that includes:
• an ambient air flow channel that extends from an ambient air inlet for inletting air outside the vehicle compartment to a first discharge port for discharging air into the vehicle compartment;
• a cabin air flow channel that extends from a cabin air inlet for air conditioning for inletting air in the vehicle compartment to a second discharge port for discharging air into the vehicle compartment;
• an ambient air fan that is arranged in the ambient air flow channel;
• a cabin air fan that is arranged in the cabin air flow channel;
• an air cooling means that cools air flowing through the ambient air flow channel and the cabin air flow channel;
• and
• an air heating means that heats air flowing through the ambient air flow channel and the cabin air flow channel,
• wherein the ambient air flow channel and the cabin air flow channel are separate from each other;
• a channel that branches from a portion on the ambient air flow channel, at a downstream side of the air cooling means but at an upstream side of the air heating means, to an inlet of the blowing means for high-voltage equipment;
• a cabin air inlet for cooling that is arranged at an upstream side of the blowing means for high-voltage equipment and inlets air from the vehicle compartment in a way that does not pass through the air conditioning means;
• and
• an air inlet mode selection means that is arranged at the portion where the channel branches, and switches a channel for air, which is sucked into the inlet of the blowing means for high-voltage equipment, between the ambient air inlet and the cabin air inlet for cooling,
• wherein the air outside the vehicle compartment is introduced by the air inlet mode selection means when supplying air cooled by the air cooling means to the high-voltage equipment from the blowing means for high-voltage equipment.