Abstract: In response to the problem of temperature difference between start and stop of gas water heaters, analyzes the working principle and the mechanism of the temperature difference between start and stop, and proposes technical solutions for ignition reaction time, shutdown reaction time, inlet and outlet water flow rate, inlet and outlet water temperature difference, and adding buffered start and stop temperature difference components to reduce the impact of temperature fluctuations on start and stop. Combine theory with whole machine testing to complete the validation of multiple factors and single variables. The experimental results show that shortening the reaction time of ignition and shutdown, reducing the inlet and outlet water flow rate, and the temperature difference between inlet and outlet, equipped with bypass pipes and constant temperature chambers, can effectively reduce the fluctuation range of start stop temperature, reduce the discomfort of sudden cold and hot water temperature, and improve the user's bathing comfort experience.

Key words: Gas water heater, Start stop temperature difference, Bathing comfort