公开(公告)号：US20240200831A1

公开(公告)日：2024-06-20

申请号：US18576292

申请日：2022-03-15

申请人： A. O. Smith (China) Water Heater Co., Ltd.

发明人： Xing LIU ,  Ran TAO ,  Qiang HUANG

IPC分类号： F24H15/124

CPC分类号： F24H15/124

摘要： Embodiments of this disclosure provide a method and apparatus for determining a fault of a heating device and an electric water heater. When the heating device includes at least two heating units in an operating state parallelly arranged on branches of a same phase line and the heating unit include a heating element and a switch controlling the heating element, the method includes: acquiring a main circuit current value of the phase line when the operating state of the heating units is not changed, and determining that a fault occurs in a heating element in at least one heating unit when the main circuit current value is not greater than a first current value; and acquiring a variation value of the main circuit current value caused by turning on/off the switch, and determining that a fault occurs in a heating element controlled by the switch when the variation value of the main circuit current value is not greater than a preset variation value. With the embodiments of this disclosure, diagnosis of faults in a plurality of heating elements in the heating device may be achieved at a low cost and high reliability.