| 摘要 |
PROBLEM TO BE SOLVED: To accurately indicate the cleaning period of a condenser or its filter by deciding and indicating a clog when the difference between a mean condenser temperature when a compressor is in operation and a mean condenser temperature when the compressor is at a stop is higher than a reference temperature difference. SOLUTION: A microcomputer 8 stores a memory with the condenser temperature when the compressor is in operation in specific time units with the detection signal of a thermistor 3. Then all condenser temperatures in the specific time units when the compressor was in operation last time are read out of the memory each time the operation of the compressor 1 is restarted to calculate the mean temperature, and all condenser temperatures in the specific time unit when the compressor was at a stop last time are read out of the memory to calculate the mean temperature. Further, when the temperature difference between the mean condenser temperatures when the compressor is in operation and at a stop is larger than the reference temperature difference, a clog is decided and indicated on a display unit 9. |
