Gas water heater and control method thereof

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By installing an oxygen sensor in the gas water heater and correcting the combustion curve, and adjusting the gas valve and fan, the problem of unstable combustion in gas water heaters under different altitudes and weather conditions was solved, achieving stable and efficient adaptive combustion control.

CN117287845BActive Publication Date: 2025-12-12QINGDAO HAIER SMART TECH R & D CO LTD

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Patent Information

Application Number: CN202210700539.2
Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner
Filing Date: 2022-06-20
Publication Date: 2025-12-12
Estimated Expiration: 2042-06-20

Application Information

Patent Timeline

20 Jun 2022

Application

CN202210700539.2

12 Dec 2025

Publication

CN117287845B

IPC: F24H1/14; F24H9/1836; F24H9/20; F24H9/25; F24H15/305; F24H15/35; F24H15/443

CPC: F24H1/145; F24H9/1836; F24H9/2035; F24H9/25; F24H15/35; F24H15/443; F24H15/305

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Application Domain

Water heaters Control of fluid heaters

Technology Topics

Combustion instability Thermodynamics

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AI Technical Summary

Technical Problem

Existing gas water heaters have unstable combustion conditions under different altitudes and weather conditions, and cannot adapt to the differences in air composition in different regions, resulting in unstable combustion.

Method used

By installing first and second oxygen sensors in the gas water heater, the oxygen content of the intake air and exhaust smoke is detected. The controller corrects the combustion curve based on the oxygen content and adjusts the speed of the gas valve and fan to match the air-fuel ratio, thus achieving adaptive combustion control.

Benefits of technology

Maintaining stable and efficient combustion under different altitudes and weather conditions improves the reliability and safety of gas water heaters and avoids abnormal combustion.

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Abstract

The application provides a gas water heater and a control method thereof, wherein the control method comprises: obtaining a power-on event of the gas water heater; obtaining oxygen content of air at an air inlet of the gas water heater to obtain inlet air oxygen content; correcting a preset combustion curve of the gas water heater according to the inlet air oxygen content to obtain a corrected curve, wherein the combustion curve is used to define a corresponding relationship between a gas valve opening degree and a fan rotating speed of the gas water heater; and adjusting the gas valve and the fan of the gas water heater according to the corrected curve during water heating of the gas water heater. The scheme of the application automatically adapts to differences of different working environments, and avoids combustion instability caused by air differences.

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