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US 2021/0197119 A1Published application
Multi-mode air drying system
AssigneeIngersoll-Rand Industrial U.S., Inc.
InventorsStefano Vezil, Paolo Depiero, Giovanni Battista Capellari
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Abstract
A compressed air drying system is provided for removing moisture from compressed air. The dryer operates in two modes in response to the demand for compressed air. In a first mode of operation, a refrigeration compressor runs continuously and the speed of a condenser fan is varied to maintain a constant cooling temperature. In a second mode of operation, the refrigeration compressor runs intermittently between on and off periods. As result, the cooling temperature fluctuates during the second mode of operation.
Claims20
A method of drying compressed air, comprising:
- supplying compressed air to one side of a first heat exchanger;
- supplying refrigerant to another side of the first heat exchanger;
- in a first mode when a demand for the compressed air is above a threshold, running a compressor continuously and varying a speed of a condenser fan in response to the demand for the compressed air, the compressor compressing the refrigerant after passing through the first heat exchanger and the condenser fan blowing air across a second heat exchanger to cool and condense the refrigerant after passing through the compressor;
- and
- in a second mode when a demand for the compressed air is below the threshold, running the compressor intermittently between on periods and off periods, the compressed air passing through the first heat exchanger while the refrigerant passes through the first heat exchanger during the on periods, and the compressed air passing through the first heat exchanger without the refrigerant passing through the first heat exchanger during the off periods.
2 more elements
Dependencies are inferred from the claim text.