Protection device of gas water heater flue blockage and detecting method thereof

Abstract

A protection device for gas water heater flue blockage comprises a fan and a controller, and further comprises a rotation speed detecting circuit, a current detecting circuit, a voltage detecting circuit, and a linear amplification and filter circuit, wherein the fan is an alternating current fan, the voltage detecting circuit is respectively connected with the fan and the controller electrically, one end of the current detecting circuit is electrically connected with the controller through the linear amplification and filter circuit, the other end of the current detecting circuit is electrically connected with the fan, one end of the rotation speed detecting circuit is connected with the fan, and the other end of the rotation speed detecting circuit is electrically connected with the controller. A detecting method of the protection device comprises the steps of setting working parameters of the fan in all burning working stations and all blockage degrees and the like. Under the condition that an air pressure switch is not needed, the protection device can control the fan to work according to different blockage degrees of a flue, and when the flue is blocked to a certain degree, the water heater is switched off timely and accurately so that use safety of the water heater is guaranteed.

Description

technical field [0001] The invention relates to a gas water heater flue blockage protection device and a detection method thereof. Background technique [0002] When the flue is blocked, the existing gas water heaters rely on the air pressure switch connected to the fan to realize shutdown protection, but the feedback signal of the air pressure switch is single, only open and closed, and cannot be controlled according to the degree of blockage Due to the instability of the design of the air pressure switch itself, the information feedback is not timely or the information feedback is wrong, which leads to the failure of the normal use of the water heater and even disasters. In order to overcome these defects, a gas water heater flue blockage protection device and its detection method were developed. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a gas water heater flue blockage protection device and its detecti...

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Problems solved by technology

[0002] When the flue is blocked, the existing gas water heaters rely on the air pressure switch connected to the fan to realize shutdown protection, but the feedback signal of the air pressure switch is single, only open and closed, and cannot be controlled according to the degree of blockage The work of the fan, and due to the instability of the design of the air pressure switch itself, there are often situations where the information feedback is not timely or the information feedback is wrong, resulting in the water heater not working normally, and even causing disasters.

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