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Vehicle air conditioner with non-contact temperature sensor
| Details |
Inventors: Kawai, Takayoshi; Kajino, Yuichi; Ichishi, Yoshinori; Kamiya, Toshifumi; Sugi, Hikaru; Harada, Shigeki; Kuribayashi, Nobukazu; Kumada, Tatsumi; Yamaguchi, Akira; Tomita, Hiroyuki;
Assignee: Denso Corporation (Kariya, JP)
Primary Examiner: Tapolcai; William E.
Assistant Examiner:
Attorney, Agent or Firm: Harness, Dickey & Pierce, PLC
A vehicle air conditioner has a non-contact temperature sensor for detecting a surface temperature of a detection range of a passenger compartment. The detection range includes a first detection portion in which a surface temperature is changed to approximately correspond to an inside air temperature, a second detection portion in which a surface temperature is changed in accordance with an outside air temperature, and a third detection portion in which a surface temperature is changed in accordance with a sunlight amount entering the passenger compartment. In the vehicle air conditioner, a target temperature of air blown into the passenger compartment is calculated based on a set temperature and a surface temperature from the non-contact temperature sensor, while air-conditioning performance is improved. |
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DETAILED DESCRIPTION In view of the foregoing problems, it is an object of the present invention to provide a vehicle air conditioner which can accurately control temperature inside a passenger compartment by effectively using a non-contact temperature sensor even when number of sensors is reduced.
It is an another object of the present invention to provide a vehicle air conditioner which controls temperature inside the passenger compartment to correspond to temperature feeling of a passenger, by effectively using a non-contact temperature sensor.
It is a further another object of the present invention to provide a vehicle air conditioner which prevents air-conditioning feeling for a passenger from being deteriorated due to an error-detection.
According to a first aspect of the present invention, a control unit of a vehicle air conditioner includes a temperature setting unit for setting a temperature of the passenger compartment to a set temperature, and a non-contact temperature sensor which detects a surface temperature of a predetermined detection range of the passenger compartment.
The predetermined detection range of the non-contact temperature sensor includes at least one of a first detection portion in which a surface temperature is changed to approximately correspond to an inside air temperature inside the passenger compartment, a second detection portion in which a surface temperature is changed in accordance with an outside air temperature outside the passenger compartment, and a third detection portion in which a surface temperature is changed in accordance with a sunlight amount entering the passenger compartment.
In the air conditioner, the control unit calculates the target air temperature at least using the set temperature from the temperature setting unit and a detection surface temperature detected from the non-contact temperature sensor.
Accordingly, it is possible to output an environment signal relative to the inside air temperature, the outside air temperature and the sunlight amount entering the passenger compartment from the non-contact temperature sensor; and therefore, temperature of the passenger compartment is controlled to a suitable temperature corresponding to the inside air temperature, the outside air temperature and the sunlight amount
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Navigation and GPS 
