Combustion anti-freezing control method and gas water heater using same

Abstract

The invention provides a combustion anti-freezing control method and a gas water heater using same. Under an electrified standby or shutdown mode when water is not boiled, a temperature sensor collects water inlet temperature, water outlet temperature and environment temperature on the upper portion of a water tank of the gas water heater in real time, and sends the collected temperature to a maincontroller, the main controller calculates out change rate value of decreasing of the environment temperature in real time, and presets combustion anti-freezing load level, combustion anti-freezing safe time, combustion anti-freezing start temperature threshold value and combustion anti-freezing close temperature threshold value according to the change rate value, and therefore the main controller can control ignition of the main controller according to the preset combustion anti-freezing start temperature threshold value, achieves proactive identification of the change speed rate of the decreasing of the environment temperature and proactive start of a consumption anti-freezing mode according to the preset combustion anti-freezing load level, combustion anti-freezing safe time and combustion anti-freezing close temperature threshold value, can accurately, effectively and rapidly burn at low temperature for heating a water tank so as to achieve reliable and safe anti-freezing effect.

Description

technical field [0001] The invention belongs to the technical field of gas water heater circuit control, and in particular relates to a combustion antifreeze control method and a gas water heater using the method. Background technique [0002] The temperature in the northern region is low in winter, and the cold air will enter the upper part of the gas water heater tank through the exhaust pipe of the gas water heater. When the gas water heater is not in use, it will freeze the water in the water tank and make the gas water heater unusable. In severe cases, the water in the water tank will freeze Expansion will cause permanent damage to the water tank, causing economic losses to users and increasing the product maintenance rate. [0003] At present, the common gas water heaters prevent the upper part of the water tank from bursting. Generally, 220Vac resistance heating rods with temperature control switches are used to buckle the water tank to heat at low temperature to achi...

AI Technical Summary

Problems solved by technology

[0002] The temperature in the northern region is low in winter, and the cold air will enter the upper part of the gas water heater tank through the exhaust pipe of the gas water heater. When the gas water heater is not in use, it will freeze the water in the water tank and make the gas water heater unusable. In severe cases, the water in the water tank will freeze Expansion will cause permanent damage to the water tank, causing economic losses to users and increasing the product maintenance rate

[0003] At present, the common gas water heaters prevent the upper part of the water tank from bursting. Generally, 220Vac resistance heating rods with temperature control switches are used to buckle the water tank to heat at low temperature to achieve low-temperature antifreeze effect. Problems such as low heat conduction efficiency, large electric power, large temperature control error, etc.

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