| 摘要 |
PURPOSE:To automatically clean a purifying section by alternately using a microfilter with an ion exchanger which constitute a refrigerant cleaning section according to the outputs of a flow rate sensor or a contamination detection sensor. CONSTITUTION:This system is provided with a switching means 20 which takes in a refrigerant from a refrigerant tank 1, a microfilter 11A and an ion exchanger 11B which are connected to the switching means 20, a flow rate sensor 22, and a contamination detecting sensor 23 in the tank 1. A refrigerant feeding controller 24 receives the outputs of the sensors 22, 23, and sends a switching signal to the switching means 20 to control to switch to the microfilter 11A or the ion exchanger 11B alternately according to the outputs of the flow rate sensor 22 or the contamination detecting sensor 23. When the refrigerant is cleaned with the microfilter 11A, and the output of the flow rate sensor 22 decreases, the ion exchanger 11B is used as a cleaning means. The filter 11A is rotated downward to remove duct collected on the filter by vibration at the time. |
