公开(公告)号：US11739983B1

公开(公告)日：2023-08-29

申请号：US17024252

申请日：2020-09-17

申请人： Trane International Inc.

发明人： Youssef A Jaber ,  Wayne N Kraft

IPC分类号： F24H9/20 ,  F23L17/00 ,  F23N1/02 ,  F24D5/04 ,  F23N5/00 ,  F24H3/06

CPC分类号： F24H9/2085 ,  F23L17/005 ,  F23N1/022 ,  F23N5/006 ,  F24D5/04 ,  F24H3/065 ,  F23N2225/04 ,  F23N2225/16 ,  F23N2235/16

摘要： A method is provided for controlling combustion in a modulating gas furnace. The method includes receiving an indication of a firing rate setpoint for a burner assembly, and applying the firing rate setpoint to first and second continuous functions that map the firing rate setpoint to air-to-fuel ratio and combustion system pressure setpoints. A variable-speed draft inducer blower is set to drive to a combustion system pressure setpoint, and the modulating gas valve is controlled during combustion in the combustion system. In this regard, a combustion system pressure measurement is obtained and applied to an inverse of the first continuous function that outputs an adjusted firing rate for the combustion system pressure measurement. The adjusted firing rate is applied to a third continuous function that maps the firing rate to gas valve position, and outputs a gas valve position to which the modulating gas valve is set.