公开(公告)号：US20220373225A1

公开(公告)日：2022-11-24

申请号：US17324711

申请日：2021-05-19

Applicant: A. O. SMITH CORPORATION

Inventor： Andrew William Phillips ,  Christopher Glynne Townsend ,  Ray O. Knoeppel ,  Brian T. Branecky ,  Kedar D. Dimble

IPC: F24H9/00

Abstract: A water heater includes a tank configured to hold a fluid, a sacrificial anode located within the tank, and a controller coupled to the sacrificial anode. The controller is configured to selectively complete and break an electrical circuit connecting the tank and the sacrificial anode. The controller is also configured to measure a shorted anode current through the electrical circuit, to determine a modulation duty cycle based on a current setpoint and the measured shorted anode current, and to repeatedly complete and break the electrical circuit using the modulation duty cycle.

公开(公告)号：US11788771B2

公开(公告)日：2023-10-17

申请号：US17324711

申请日：2021-05-19

Applicant: A. O. SMITH CORPORATION

Inventor： Andrew William Phillips ,  Christopher Glynne Townsend ,  Ray O. Knoeppel ,  Brian T. Branecky ,  Kedar D. Dimble

IPC: F24H9/45

CPC classification number: F24H9/45

Abstract: A water heater includes a tank configured to hold a fluid, a sacrificial anode located within the tank, and a controller coupled to the sacrificial anode. The controller is configured to selectively complete and break an electrical circuit connecting the tank and the sacrificial anode. The controller is also configured to measure a shorted anode current through the electrical circuit, to determine a modulation duty cycle based on a current setpoint and the measured shorted anode current, and to repeatedly complete and break the electrical circuit using the modulation duty cycle.