Patent ID: 11925006
Assignee: VERTIV CORPORATION
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 18:
19. A method of modulating cooling capacity of a cooling system comprising a two-stage compressor, a variable speed fan and at least one controller, the method comprising:
running the compressor in a loaded state and the fan at a maximum speed (Fmax) when a call for cooling calls for 100% system cooling capacity (CFCmax),
running the compressor in the loaded state and decreasing a fan speed from Fmax toward a lesser fan speed (F1) as the call for cooling decreases from CFCmax toward a lesser cooling capacity (CFC1),
wherein F1 is the fan speed at which the cooling system has equal cooling capacity with the compressor running in the loaded state as the cooling system has when the fan is running at Fmax and the compressor is running in an unloaded state, and
wherein CFC1 is the system cooling capacity (a) when the fan is running at Fmax and the compressor is running in the unloaded state, and (b) when the fan is running at F1 and the compressor is running in the loaded state; and
when the call for cooling reaches CFC1,
running the compressor in the unloaded state, and
increasing the fan speed from F1 to Fmax.