| 摘要 |
PROBLEM TO BE SOLVED: To supply a required amount of a lubricant to a refrigerant compressor even in a high load state.SOLUTION: A compressed air dehumidifier includes: a plate type heat exchanger provided with an air introduction port 21, an air discharge port 22, a drainage port 23, a refrigerant introduction port 24, and a refrigerant discharge port 25 and configured to conduct heat exchange between compressed air in a first space S1 and a refrigerant in a second space S2 to condense a moisture content contained in the compressed air and dehumidify the compressed air; a control unit configured to control operation of a refrigeration cycle 2; a lubricant discharge pipeline P5 for discharging a lubricant accumulated in the second space S2 to a refrigerant pipeline P4; and an electromagnetic valve 15 configured to adjust a flow rate of a fluid moving in the lubricant discharge pipeline P5. The control unit 4 executes first processing, in which the control unit 4 controls the electromagnetic valve 15 to increase the flow rate of the fluid moving in the lubricant discharge pipeline P5, when detecting a predetermined high load state.SELECTED DRAWING: Figure 1 |
