Control circuit and system for electric kettle

Abstract

The invention discloses a control circuit and a system for an electric kettle. The control circuit and the system comprise a power supply system, a display system, a temperature measuring system and a dry burning preventing system, wherein the temperature control system comprises a thermally sensitive resistor, a temperature control conducting wire and a temperature control wiring electrode; the dry burning preventing system comprises a water level contact pin, a pull-up resistor, a dry burning preventing conducting wire and a dry burning preventing wiring electrode; the thermally sensitive resistor and the water level contact pin are respectively accommodated in a two-in-one probe; the two-in-one probe comprises a temperature control probe, a dry burning preventing probe and a sealing cover; one end of the temperature control conducting wire is connected with the thermally sensitive resistor; the other end of the temperature control conducting wire is connected with the temperature control wiring electrode; one end of the dry burning preventing conducting wire is connected with the water level contact pin, the pull-up resistor and the thermally sensitive resistor; the other end of the dry burning preventing conducting wire is connected with the dry burning preventing wiring electrode; and the power supply system, the display system, the temperature measuring system and the dry burning preventing system are respectively connected with a control chip. Due to the adoption of the structure, the dry burning preventing control circuit and system which are safe, reliable, simple, convenient and practicable and can be used for simultaneously monitoring the water temperature and the water amount and automatically stopping heating to prevent the dry burning when the water amount is lower than a warning water level.

Description

technical field [0001] The invention relates to an electric kettle control system, in particular to an anti-dry heating control circuit and system. Background technique [0002] Electric kettles are widely used in tea art. The existing electric kettles will be equipped with some protection measures, such as temperature detection, water shortage protection, etc., but the temperature detection is only used to control the water temperature in the kettle, because the kettle is a heating element with a heating tube. To boil water, users may sometimes forget to turn off the power, or there is no water in the kettle, and then start heating, which may damage the heating element of the kettle, or even cause a fire. Contents of the invention [0003] In view of this, the technical problem to be solved by the present invention is to provide an anti-dry heating control circuit and system that can simultaneously monitor the water temperature and water volume of the kettle, and automati...

AI Technical Summary

Problems solved by technology

[0002] Electric kettles are widely used in tea art. The existing electric kettles will be equipped with some protection measures, such as temperature detection, water shortage protection, etc., but the temperature detection is only used to control the water temperature in the kettle, because the kettle is a heating element with a heating tube. To boil water, users may sometimes forget to turn off the power, or there is no water in the kettle, and then start heating, which may damage the heating element of the kettle, and even cause a fire

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