CONTROLLING CIRCUIT OF AIR CLEANING APPARATUS

摘要

PURPOSE:To attain stable operation easily by changing-over the voltage of a circuit in output stage of a gas sensor higher and lower in accordance with the operation and stopping of the title apparatus, respectively. CONSTITUTION:A gas sensor 11 is provided to detect the pollution of interior air and a controlling circuit 10 to operate or stop the title apparatus automatically depending on the output of the gas sensor 11. Depending on the operating or stopping conditions of the apparatus, the voltage of a circuit in output stage of the gas sensor 11 is changed-over to be higher or lower, respectively and the output of the gas sensor is regulated to be lower at the time of stop than the operation time. As a result, stable operation of the apparatus can be achieved easily.