Patent ID: 11964537
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Transport (Mechanical engineering)
Classification: CPC B | IPC B

Claim 4:
5. A vehicle air conditioning device, comprising:
an air conditioning cycle configured to compress and expand a refrigerant, the air conditioning cycle comprising:
a compressor configured to compress the refrigerant;
an exterior heat exchanger through which the refrigerant circulates;
an interior heat exchanger through which the refrigerant circulates; and
an expansion valve configured to expand the compressed refrigerant;

a heater core through which a second refrigerant circulates, the heater core being configured to heat air that is to be supplied to a vehicle cabin;
a high pressure side pressure sensor configured to detect a pressure on the high pressure side of the air conditioning cycle;
a heater core inlet refrigerant temperature sensor configured to detect a temperature of the second refrigerant at an inlet of the heater core as a heater core inlet refrigerant temperature;
a first map that represents a relationship between the high pressure side pressure detected by the high pressure side pressure sensor and an outside air temperature; and
a second map for converting the heater core inlet refrigerant temperature detected by the heater core inlet refrigerant temperature sensor to a first correction outside air temperature,
wherein an estimated outside air temperature is calculated based on the outside air temperature calculated using the first map and the first correction outside air temperature calculated using the second map.