Method for detecting venting safety of water heater

Abstract

The invention provides a method for detecting venting safety of a water heater. The method comprises the steps that (A) an air blower is started, and rotation speed values of a motor are detected; (B) a first allowable rotation speed scope is formed according to the detected rotation speed values; (C) when the water heater is started once again, the air blower is started at first, and a rotation speed value of the motor is detected; and (D) whether the detected rotation speed value stays within the first allowable rotation speed scope is determined, wherein gas will be supplied to a combustor for combustion if the rotation speed value stays within the scope. After a water outlet temperature reaches a corresponding constant temperature scope during the combustion, rotation speeds of the motor will be detected, so a second allocable rotation speed scope can be formed; and the rotation speed values of the motor are detected continuously, and the gas supply will be stopped when the detected rotation speed value exceeds the second allowable rotation speed scope. Hence, an actual installation state of a vent pipe could be taken as a comparison standard; and accuracy of detection results can be enhanced.

Description

technical field [0001] The invention relates to a gas water heater; in particular, it refers to a method for detecting the exhaust gas safety of the water heater. Background technique [0002] Water heaters that use natural convection to discharge exhaust gas often cannot discharge the carbon monoxide produced during incomplete combustion outside in time because the air circulation is too slow, and it is easy to cause indoor personnel to inhale carbon monoxide due to carelessness. When people inhale too much carbon monoxide, It will make the human tissue hypoxic and cause discomfort, what's more, there is a danger of death. [0003] In order to prevent the above situation from happening, some operators have developed a forced air supply type water heater, which uses the addition of a blower to the water heater to provide combustion-supporting air and increase the air circulation inside the water heater, thereby providing more air volume To improve the heating efficiency of ...

AI Technical Summary

Problems solved by technology

[0006] Although the existing exhaust safety detection method can improve the safety of the water heater, it still has limitations in use

In actual use, it is often encountered that the exhaust pipe connected to the water heater is long in length or has many bends. When the water heater is installed, the back pressure of the exhaust gas is high at the beginning, and the initial motor speed value is also low. higher

In this way, if there is wind blowing into the exhaust pipe from outside, or the exhaust pipe is slightly covered, it is easy to make the motor speed value higher than the upper limit of the speed range, resulting in a misjudgment that the exhaust pipe is seriously blocked

Images