Electric kettle capable of automatically opening/closing cover and alarming

Abstract

The invention discloses an electric kettle capable of automatically opening / closing a cover and alarming. The electric kettle comprises an electric kettle body, an automatic cover opening / closing mechanism, a singlechip microcomputer, an electronic switch, a power supply / temperature sensor and an alarming module, wherein the electric kettle body comprises a kettle cover and a heating resistor; the singlechip microcomputer comprises a temperature acquisition module, a boiling judgment module and a control module; the boiling judgment module is used for judging whether water in the electric kettle reaches a boiling state according to the change rate of water temperature; the control module is used for controlling the automatic cover opening / closing mechanism to open the kettle cover when the boiling judgment module judges that the water reaches the boiling state, controlling the electronic switch to break off the circuit and controlling the automatic cover opening / closing mechanism to close the kettle cover after a preset time. The invention provides a method for effectively judging the boiling state of the electric kettle; the automatic cover opening / closing mechanism is arranged for automatically opening the kettle cover for continuously heating after water boils until the kettle cover is automatically closed after the preset time, so that harmful substances in the water are fully volatilized, and the water quality is improved.

Description

technical field [0001] The invention relates to the field of household electric electric kettles, in particular to an electric kettle with an automatic opening and closing cover and an alarm. Background technique [0002] The electric kettle has gradually become a tool for boiling water in ordinary families. The operation of the electric kettle is simple, safe and reliable. Just connect the tap water to the body of the kettle, then put the body of the kettle with tap water on the power base, and turn on the power switch. The electric kettle starts to heat the water in the kettle body, and when the water boils, the power is automatically disconnected. Electric kettle is generally liked by people. [0003] There are various electric kettles in the market, most of which include a kettle body and a base arranged at the bottom of the kettle body, a handle is arranged on the kettle body, and a temperature control switch is installed in the handle. The temperature control switch ...

AI Technical Summary

Problems solved by technology

The temperature control switch is formed by the principle of thermal expansion and contraction of the shrapnel of the mechanical jet type. During use, if the air pressure or temperature of the kettle body leaks after the water is boiled in the existing electric kettle, it is easy to cause the temperature control switch to fail. Automatic tripping or non-stop after the water is turned on for a long time

If water remains on the surface of the temperature control switch in the handle or in a humid environment, the 220 volt high-voltage alternating current will be transmitted to the handle through the temperature control switch inside the handle, resulting in leakage and electric injury when using.

[0004] The traditional method of judging and controlling the boiling of water in an electric kettle is to use a steam switch made of a bimetallic sheet. After the water boils, there must be enough water vapor to make the steam switch act and cut off the heating power. The disadvantage of this method is that : Due to the need for a sufficient amount of water vapor to enter the steam switch, the steam channel and the movement mechanism are increased, which limits the overall appearance design, and is not sensitive enough when the heating power is cut off after the water boils

The disadvantage of this method is: at a higher altitude, even if the water boils, it will not reach the set water boiling temperature, and the heating power supply will continue to heat, which will cause a hidden danger of safety accidents.

[0006] The problems existing in the existing electric kettle are as follows: after the water is boiled, the time to automatically cut off the power is very short, and the lid of the electric kettle is always closed

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