Electric food warmer capable of protecting heating resistor from being burntout

Abstract

The invention discloses an electric food warmer capable of protecting a heating resistor against burnout, and belongs to the technical field of kitchen appliances. The electric food warmer comprises a warmer body and a shell, wherein the warmer body is arranged on the shell, a resistance wire and a sliding groove are arranged in the shell, the resistance wire and the sliding groove are in an involute shape, one end of the outer side of the resistance wire is fixedly installed on the inner wall of the shell through an insulating seat, the sliding groove is formed below the resistance wire and fixedly installed on the inner wall of the shell, a rigid electrode is arranged along one side of the outline of the sliding groove, the first end of the rigid electrode is connected with one end of the inner side of the resistance wire, the second end of the rigid electrode is communicated with the positive electrode of a constant-current power source, a connecting device is installed on the sliding groove in a sliding mode, the connecting device is communicated with the negative electrode of the constant-current power source through a flexible conducting wire and a take-up device, a driving device drives the connecting device to slide on the sliding groove to change the length of the resistance wire connected into a circuit, and then the temperature of the warmer body is controlled. According to the invention, a new electric food warmer temperature adjusting mode is provided, the service life of the electric food warmer is prolonged, and practicability is high.

Description

technical field [0001] The invention relates to the technical field of kitchen appliances, in particular to an electric heating pot capable of protecting a heating resistor from burning. Background technique [0002] Ordinary electric heating pans adjust the power through the current of the resistance wire, but this will accelerate the damage of the electric heating pan due to the different temperatures of the resistance wires, affecting the service life and safety of the electric heating pan. The ideal situation is that the resistance wire is in a fixed position. In this way, the damage to the resistance wire will be reduced, thereby increasing the service life of the electric heating pan. At the same time, impurities in the kitchen, such as oil, dust, volatile substances or carbon deposits, can damage heating elements, sulfur has a corrosive effect on all nickel alloys, chlorine in different states can damage the performance of resistance wires, and metal solutions or salt...

AI Technical Summary

Problems solved by technology

[0003] The Chinese invention patent with the publication number CN112603159A discloses an electric heating pan and its control method, which belongs to the field of electric heating pan technology, and is characterized in that: the electric heating pan includes a main body of the electric heating pan and a controller separately arranged from the main body of the electric heating pan, and the main body of the electric heating pan The upper part of the electric heating pot is provided with an inner pot. The main body of the electric heating pot and the inner pot seal the power supply line and the signal line. The connector plugged with the controller, the controller of the electric heating pot is set separately from the main body of the electric heating pot, which can prevent water from entering the controller when washing the pot and causing damage to the controller, but this prior art still adopts conventional The temperature adjustment method cannot reduce the protection of the heating resistance wire, and cannot achieve the effect of prolonging life and improving safety. Therefore, the present invention provides an electric heating pan that can protect the heating resistance from burning out. Changes in the damage to the heating resistance, and a dust removal device, greatly improving the service life and safety of the electric heating pan

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