Patent ID: 8932119
Filing Date: 2015-01-13
Classification: B60H

Abstract:
1. A vehicle air conditioner comprising: a control unit that performs control actions comprising: switching between an outside air conditioning mode for leading in outside air to perform air conditioning and an inside air circulating mode for circulating air in a vehicle to perform air conditioning, calculating surface temperature on an interior side of a window glass on the basis of, among outside temperature, inside temperature, and vehicle speed, at least the outside temperature and the inside temperature; determining window mist occurrence limit humidity at which a mist occurs on the window glass from absolute humidity at which dews concentrate at the surface temperature; repeatedly determining if an inside humidity is within a predetermined range with respect to the mist occurrence limit humidity and if so, performing operation control for reducing the inside humidity, wherein determining if the inside humidity is within the predetermined range and performing the operation control includes: detecting if an exhaust gas concentration is equal to or higher than a predetermined threshold and, if so, the control unit switches the outside air conditioning mode to the inside air circulating mode and calculates the mist occurrence limit humidity.