US 12,268,987 B2
Multi-mode air drying system
Stefano Vezil, Trieste (IT); Paolo Depiero, Tavagnacco (IT); and Giovanni Battista Capellari, Fogliano-Redipuglia (IT)
Assigned to Ingersoll-Rand Industrial U.S., Inc., Davidson, NC (US)
Filed by Ingersoll-Rand Industrial U.S., Inc., Davidson, NC (US)
Filed on May 23, 2024, as Appl. No. 18/672,884.
Application 18/672,884 is a continuation of application No. 18/203,387, filed on May 30, 2023, granted, now 12,017,181.
Application 18/203,387 is a continuation of application No. 17/851,553, filed on Jun. 28, 2022, granted, now 11,697,093, issued on Jul. 11, 2023.
Application 17/851,553 is a continuation of application No. 16/731,262, filed on Dec. 31, 2019, granted, now 11,369,920, issued on Jun. 28, 2022.
Prior Publication US 2024/0307818 A1, Sep. 19, 2024
Int. Cl. B01D 53/26 (2006.01); F25B 39/00 (2006.01)
CPC B01D 53/265 (2013.01) [F25B 39/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for drying compressed air comprising:
supplying the compressed air to a heat exchanger;
supplying a refrigerant to the heat exchanger;
operating a condenser fan to blow across a refrigerant compressor;
in a first mode, continuously compressing the refrigerant and varying a speed of the condenser fan in response to the demand for the compressed air, and
in a second mode, intermittently compressing the refrigerant between on periods and off periods, the compressed air passing through the heat exchanger without the refrigerant passing through the heat exchanger during the off periods,
wherein in the second mode, the speed of the condenser fan is set to a constant higher speed than the speed of the condenser fan prior to a shift from the first mode to the second mode.