Vehicle air conditioning system and air conditioning control device

An air conditioning control device for a vehicle, the air conditioning control device being configured to control a windshield heater provided on a windshield of the vehicle and to control operation of an air conditioner, the vehicle being provided with:

• the windshield heater configured to heat the windshield;
• the air conditioner including a blower unit capable of adjusting a ratio of an amount of outside air introducing into a vehicle cabin and an amount of inside air circulating in the vehicle cabin, and an air conditioning unit configured to heat air supplied from the blower unit with an air conditioning heater and to blow the air into the vehicle cabin;
• an outside air temperature sensor configured to detect an outside air temperature as a temperature outside the vehicle cabin;
• and
• an inside air temperature sensor configured to detect an inside air temperature in the vehicle cabin,
• the air conditioning control device being configured to perform a control in which the windshield heater is driven to prevent the windshield from fogging up, the air conditioning heater is driven to maintain the inside air temperature of the vehicle carbine at a set temperature, and the blower unit is driven to (i) lower a ratio of an amount of the outside air introducing into the vehicle cabin and (ii) increase a ratio of inside air circulating in the vehicle cabin in accordance with the outside air temperature.

A vehicle air conditioning system comprising:

• a windshield heater provided on a windshield of a vehicle to heat the windshield;
• an air conditioner including
• a blower unit configured to drawn in outside air outside of the vehicle cabin and inside air inside of the vehicle cabin, and
• an air conditioning unit configured to heat air supplied by the blower unit with an air conditioning heater and to blow the air into the vehicle cabin;
• and
• an air conditioning control device configured to perform a control in which the windshield heater is driven in each of a deicing mode in which the windshield is deiced, a demisting mode in which the windshield is demisted, a defogging mode in which the windshield is prevented from fogging, and a human body temperature adjusting mode in which an occupant is warmed using radiant heat from the windshield heater and conditioned air is blown out from the air conditioner.