An air conditioning system for motor vehicles includes a blower configured to blow an air into a vehicle room, a PTC heater configured to heat the air blown into the vehicle room, the PTC heater having a heat generation amount adjusted by PWM duty ratio control, a blower air volume change amount measurement unit configured to, when an air volume of the blower is changed, measure a blower air volume change amount per unit time during a predetermined time period from a time point at which the air volume of the blower is changed, and a control unit configured to, when the air volume of the blower is changed, correct a PWM duty ratio of the PTC heater in view of the blower air volume change amount per unit time measured by the blower air volume change amount measurement unit.
Air conditioning system for motor vehicles
2019-10-29
Patent
Electronic Resource
English
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht / F24H FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, IN GENERAL , Erhitzer für flüssige oder gasförmige Stoffe, z.B. Wasser- oder Lufterhitzer mit Vorrichtungen zur Wärmeerzeugung, allgemein |