Patent ID: 11920923
Assignee: A. O. SMITH CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  F | IPC F  G

Claim 6:
7. A scale detection system, comprising:
a first temperature detector configured to acquire a first temperature of a heat exchange zone of a water heating device;
a second temperature detector configured to acquire a second temperature indicating a water temperature in the water heating device; and
a controller in communication with the first temperature detector and the second temperature detector, and configured to acquire a temperature difference between the first temperature and the second temperature based on the first temperature acquired by the first temperature detector and the second temperature acquired by the second temperature detector, and determine that a scale generation amount in the water heating device reaches a preset threshold when at least one of the following judgment conditions is met:
the first temperature is not less than a preset temperature threshold; and
the temperature difference is not less than a preset temperature difference threshold, and
wherein the controller is further configured to:
acquire a flow rate in the water heating device;
trigger the judgement condition that the first temperature is not less than the preset temperature threshold, when the flow rate in the water heating device is less than a first preset flow rate or greater than a second preset flow rate; and
trigger the judgement condition that the temperature difference is not less than the preset temperature difference threshold, when the flow rate in the water heating device is greater than the first preset flow rate and less than the second preset flow rate.