US 12,298,022 B2
Dynamic deadband
Leon W. Folts, Apopka, FL (US)
Assigned to Addison HVAC LLC, Orlando, FL (US)
Filed by Addison HVAC LLC, Orlando, FL (US)
Filed on Dec. 1, 2021, as Appl. No. 17/540,003.
Claims priority of provisional application 63/119,762, filed on Dec. 1, 2020.
Prior Publication US 2022/0170660 A1, Jun. 2, 2022
Int. Cl. F24F 11/64 (2018.01); F24F 1/022 (2019.01); F24F 11/83 (2018.01); F24F 110/12 (2018.01)
CPC F24F 11/64 (2018.01) [F24F 1/022 (2013.01); F24F 11/83 (2018.01); F24F 2110/12 (2018.01)] 27 Claims
OG exemplary drawing
 
1. A method for automatic sequence control of a direct expansion heating and cooling equipment, the method comprising the steps of:
configuring a programmable logic controller having a memory and in electronic communication with at least one processor;
wherein the programmable logic controller is configured to run a control algorithm;
setting a deadband around a pre-determined setpoint for controlling a set of operating parameters for the equipment;
wherein the programmable logic controller is further configured to:
calculate a variation in a temperature of the equipment based on readings from a plurality of sensors embedded in the equipment;
determine a capacity of the equipment over a certain period of time based on the sensor readings; and
provide an input to the control algorithm in the event that the capacity of the equipment is outside the deadband such that the deadband is then altered to increase continuous equipment operation and reduce cycling of a compressor.