Anti-freezing method of gas water heater, and anti-freezing gas water heater

Abstract

The invention relates to the technical field of gas water heaters, and discloses an anti-freezing method of a gas water heater, and the anti-freezing gas water heater. The anti-freezing method comprises the steps: the temperature of a heat exchanger in an anti-freezing mode and the environment temperature of the gas water heater are obtained; whether the temperature of the heat exchanger is lowerthan a preset first anti-freezing threshold value or not is judged; when the temperature of the heat exchanger is lower than the preset first anti-freezing threshold value, a fan is started; whether the environment temperature is larger than a preset air warming anti-freezing threshold value or nor is judged; if yes, the gas water heater enters into an air warming anti-freezing mode; and if not, acombustion device is started, and the gas water heater enters into a combustion anti-freezing mode, wherein the air warming anti-freezing threshold value is larger than the first anti-freezing threshold value. The anti-freezing method of the gas water heater, and the anti-freezing gas water heater have the beneficial effects that by adopting the fan and combustion combined anti-freezing method, icing of pipelines in the water heater can be effectively prevented, an electric heating anti-freezing device does not need to be additionally arranged, energy can be saved, and the anti-freezing costis lowered.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to an antifreeze method for a gas water heater and an antifreeze gas water heater. Background technique [0002] In the northern region, the outdoor temperature is low in winter. Since the flue of the forced-exhaust gas water heater faces the outside, cold air can easily enter the water heater through the flue to exchange heat with the residual water in the pipeline. When the temperature of the residual water in the pipe is low At 0°C, there is a risk of freezing and cracking the pipeline. [0003] Among the existing antifreeze measures for gas water heaters, motor heat antifreeze is widely used, and electric heating antifreeze is to install an electric heating device near the heat exchanger and control it through the mains; however, using electric heating to prevent freezing will consume more electric energy and cost more High, and the heating is uneven, and there are ce...

AI Technical Summary

Problems solved by technology

[0002] In the northern region, the outdoor temperature is low in winter. Since the flue of the forced-exhaust gas water heater faces the outside, cold air can easily enter the water heater through the flue to exchange heat with the residual water in the pipeline. When the temperature of the residual water in the pipe is low At 0°C, there is a risk of freezing and cracking the pipeline

[0003] Among the existing antifreeze measures for gas water heaters, motor heat antifreeze is widely used, and electric heating antifreeze is to install an electric heating device near the heat exchanger and control it through the mains; however, using electric heating to prevent freezing will consume more electric energy and cost more High, and the heating is uneven, and there are certain safety hazards

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