DUST DETECTING DEVICE

A dust detecting device detects a dust concentration at a prescribed sensing location. Furthermore, the dust detecting device is provided with: an optical type dust sensor (321) which outputs a sensoroutput value (Vs) corresponding to the dust concentration at the sensing location; and a correcting unit (322) which determines a corrected value (Vc) obtained by correcting the sensor output value,as a value representing the dust concentration. The correcting unit determines the corrected value in such a way that the corrected value becomes a value further to the lower side of the dust concentration as the wind speed at the sensing location is reduced, for a constant sensor output value. 本发明的粉尘检测装置对规定的感测部位的粉尘浓度进行检测。并且，粉尘检测装置具备：光学式粉尘传感器(321)，该光学式粉尘传感器输出与感测部位的粉尘浓度对应的传感器输出值(Vs)；以及补正部(322)，该补正部将对传感器输出值进行补正而获得的补正值(Vc)确定为表示粉尘浓度的值。该补正部以在使传感器输出值恒定的情况下，感测部位的风速越低则补正值成为粉尘浓度越低的一侧的值的方式确定该补正值。