| 摘要 |
PURPOSE:To obtain the air conditioner which can detect the timing for cleaning meeting the degree of contamination of an air filter. CONSTITUTION:The output voltage of a diode bridge 113 is divided down by voltage dividing resistors 120a, 120b and is inputted via an input port 117 to an arithmetic circuit 116. The operation time at the respective voltages of the arbitrary value of the inputted voltage are respectively computed by the arithmetic circuit 116. A relay contact 118 for indicating the cleaning of the air filter is turned on to light an indicator lamp 119 when the integrated value thereof attains a preset value. |
