Automatic fault detection method for gas water heater

Abstract

The invention discloses an automatic fault detection method for a gas water heater. The automatic fault detection method is characterized by comprising the steps of (1) initializing combustion controlparameters of the gas water heater; (2) determining whether the gas water heater meets the combustion working conditions or not; (3) determining whether the water flow is stable or not; (4) determining whether a low-voltage fault and / or a howling fault is detected for the first time or not; (5) adjusting the control parameters of the gas water heater according to the fault type; (6) storing the control parameters; and (7) entering the normal combustion working mode. The automatic fault detection method has the advantages that the control parameters of the gas water heater are adjusted and memorized, when the low-voltage condition and / or the howling condition occurs again in the next combustion process, the rotating speed of a fan and the current of a proportional valve can be directly andautomatically adjusted to a normal combustion state so as to avoid a low-voltage alarm and / or a howling alarm.

Description

technical field [0001] The invention relates to a fault detection method for a gas water heater, in particular to a fault automatic detection method for low-pressure combustion flameout and combustion whistle of the gas water heater. Background technique [0002] At present, many areas and households have adopted natural gas as fuel, but in the winter of central heating, there will be a problem of local natural gas supply shortage, and gas water heaters will burn out and scream when the ambient air pressure is relatively low. Wait for failure. [0003] In the prior art, the main method to solve the lack of air pressure and howling of the gas water heater is to adjust the nozzle aperture of the burner, but the method of adjusting the nozzle aperture will still occur when the air pressure environment changes, and it cannot completely solve the flameout , howling faults, and after each fault is eliminated, the next time the same fault occurs when the machine is turned on, it w...

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Problems solved by technology

[0003] In the prior art, the main method to solve the lack of air pressure and howling of the gas water heater is to adjust the nozzle aperture of the burner, but the method of adjusting the nozzle aperture will still occur when the air pressure environment changes, and it cannot completely solve the flameout , howling faults, and after each fault is eliminated, the next time the same fault occurs when the machine is turned on, it will still alarm, requiring manual intervention to adjust again, and the intelligence of troubleshooting is low; at the same time, the change of the nozzle aperture will bring the minimum combustion power Larger, resulting in higher outlet water temperature, which affects the user's use effect

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