Car defroster
First Claim
1. A car defroster for detecting the clouding on a window glass of a car by a sensor and removing the clouding on the window glass by blowing out the conditioned air from a defroster port provided in the vicinity of the window glass, wherein the sensor is an infrared sensor for measuring the surface temperature of the window glass.
1 Assignment
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Accused Products
Abstract
In a car defroster which detects the clouding on the window glass by a sensor and blows conditioned air out from the defroster port to the window glass to remove the blur, an infrared sensor 1 is used as the sensor for measuring the surface temperature of the window glass, and the defrosting operation is carried out according to the measuring result. The infrared sensor is provided, for example, at a center of the ceiling of the passenger compartment, and consists of at least two sensor elements so that the temperatures of window glasses in a plurality of directions are detectable.
26 Citations
14 Claims
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1. A car defroster for detecting the clouding on a window glass of a car by a sensor and removing the clouding on the window glass by blowing out the conditioned air from a defroster port provided in the vicinity of the window glass, wherein
the sensor is an infrared sensor for measuring the surface temperature of the window glass.
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13. A car defroster, comprising a controller, a defrosting apparatus blowing hot air or dry air to the window glass and a humidty sensor provided in a passenger compartment, wherein the controller comprises
means S1 for detecting the temperature of the window glass by a signal from an infrared sensor 1 and detecting the humidity in the passenger compartment by a signal from the humidity sensor, determination means S2 for calculating a dew point on the glass surface from the temperature of the window glass detected by the infrared sensor 1 and the humidity in the passenger compartment detected by the humidity sensor, comparing the calculated dew point with the window glass temperature and determining the clouding state in accordance with the comparison result, and means S3 for starting the defrosting operation in accordance with the determination of the determination means S2.
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14. A car defroster, comprising a controller, an apparatus operable when the car air-conditioner is in the defrosting mode and a humidity sensor provided in a passenger compartment, wherein the controller comprises
means S1 for detecting the temperature of the window glass from a signal from an infrared sensor 1 and detecting the humidity in the passenger compartment by a signal from the humidity sensor, determination means S2 for calculating a dew point on the glass surface from the temperature of the window glass detected by the infrared sensor 1 and the humidity in the passenger compartment detected by the humidity sensor, comparing the calculated dew point with the window glass temperature and determining whether there is a clouding or not in accordance with the comparison result, and means S3 for setting the car air-conditioner in the defrosting mode, and starting the defrosting operation, when there is the blur.
Specification