Patent ID: 11859849
Assignee: LENNOX INDUSTRIES INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 5:
6. A method of operating an HVAC system, the method comprising:
fluidically connecting a return air duct to an output airstream of an evaporator coil using an evaporator bypass line;
determining, by a controller of the HVAC system, an operating mode of the HVAC system;
determining, by the controller, a predetermined threshold ratio value for the operating mode;
determining, by the controller, whether a ratio of a minimum operating flow rate of a blower of the HVAC system to a speed of a compressor of the HVAC system is greater than the predetermined threshold ratio value for the operating mode; and
responsive to determining that the ratio is greater than the predetermined threshold ratio value, determining, by the controller, a bypass portion of a flow of air to divert from the return air duct to the output airstream of the evaporator coil based on the speed of the compressor and the predetermined threshold ratio value for the operating mode.