Gas water heater fan wind pressure resistance control method based on alternating current fan

Abstract

The invention relates to a gas water heater fan wind pressure resistance control method based on an alternating current fan. The method comprises the following steps that a fan theoretical rotating speed value V1 in a wind pressure-free state corresponding to a current alternating-current fan conduction angle is compared and calculated with a detected actual air inlet speed V2, and C is equal to V2-V1; and if C exceeds a set threshold value D, it is judged that the external wind pressure is too large, and the conduction angle of the alternating-current fan is controlled to be increased. According to the gas water heater fan wind pressure resistance control method based on the alternating current fan, the situation that the external wind pressure is increased can be effectively detected, under the situation that the external wind pressure is too large, the alternating current fan power is increased through increasing the alternating current fan conduction angle, the rotating speed of the alternating current fan is increased, and then the influence of the external wind pressure on water heater combustion is resisted, so that the situation that flames are extinguished is effectively avoided, normal combustion of the gas water heater is guaranteed, and the adaptability of the gas water heater is enhanced.

Description

technical field [0001] The invention relates to the technical field of gas water heaters, in particular to a wind pressure-resistant control method of a fan of a gas water heater based on an AC fan. Background technique [0002] The use conditions and working environment of household gas water heaters are relatively complicated. Factors such as the purity of flammable gases, the size of air pressure, the fluctuation of water flow, and the size of external wind pressure will all affect the constant temperature performance of the water heater. The gas water heater based on the AC fan has a low speed and low power, so it has poor adaptability to whether there is wind outside during use. When there is wind pressure at the outlet of the exhaust pipe, the resistance of the machine will cause the machine to turn off or ignite. Not igniting, resulting in failure to use normally. And with the increase of high-rise users, the situation that the higher the floor is, the wind pressure ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a wind pressure-resistant control method for gas water heater fans based on an AC fan that can still ensure effective ignition, combustion, and avoid flameouts in the case of excessive wind pressure.

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