| 摘要 |
PURPOSE:To prevent a refrigerator against the raise of temperature inside the cabinet, by judging it a fault when the anomaly of an inverter device recurs in designated times in starting, and by changing over the inverter to keep on operating a compressor from a commercial power source. CONSTITUTION:In an operation control system such as for a refrigerator, etc., a commercial power source 1 is connected to a compressor 2 in starting and in normal operation through a changeover means 3. An inverter 4 is also connected to the other terminal of the changeover means 3. The refrigerator is equipped with a temperature detector 5 inside the cabinet, a quenching switch 6, a protection circuit 7 and a control circuit 8. With the control circuit 8 the output of the temperature detector 5, etc., are taken in and the control signal is outputted to the inverter 4 and changeover means 3. A time means 9, an AND circuit 10 and a count means 11 are provided to input the signal to the inverter device 4 by the control circuit 8. It is not judged as a fault of the inverter device 4 until its anomaly recurs in designated times, when the changeover means 3 is switched to the commercial power source 1 side. |
