Electric kettle with automatically opening and closing lid based on rate of water temperature change

Abstract

The invention discloses an electric kettle with an automatically opening and closing lid based on rate of water temperature change, comprising a kettle body, an automatically opening and closing lid mechanism, a single chip microcomputer, an electronic switch, a power supply and a temperature sensor. The kettle body comprises a lid and a heating resistor. The single chip microcomputer comprises a temperature acquisition module, a boiling judging module and a control module. Boiling state of the water in the kettle is judged by the boiling judging module based on the rate of water temperature change. If the water is judged as in the boiling state by the boiling judging module, the lid will be opened by the automatically opening and closing lid mechanism controlled by the control module. After a preset period of time, the electronic switch is turned off and the lid is closed by the automatically opening and closing lid mechanism controlled by the control module. The invention proposes an effective method to judge the boiling state of water in an electric kettle. And by use of the automatically opening and closing lid mechanism, the lid is opened automatically after boiling and the water is kept heated for a preset period of time and then the lid is closed automatically. In this way, hazardous substance in water is fully volatilized and water quality is improved.

Description

technical field [0001] The invention relates to the field of electric kettles for domestic appliances, in particular to an electric kettle with an automatic opening and closing lid based on the control of the rate of change of water temperature. 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 ins...

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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