| 摘要 |
<p>A first and second gas detecting sections (33, 34) take in outputs from an oxidizing gas sensor (1) and a reducing gas sensor (2), respectively, at a predetermined sampling cycle, detecting the extent of pollution of outdoor air based on the outputs. The result of the detection by the first and second gas detecting sections (33, 34) are inputted in a PWM signal output section (35), and based on a detection result, out of the two results, having a higher extent of pollution, a pollution signal Vp, which is a PWM signal in which a duty ratio discretely varies depending on the extent of pollution, is generated and outputted to an air conditioning control microcomputer (41).</p> |
