Microwave-heating electric warmer based on single chip microcomputer

Abstract

The invention discloses a microwave-heating electric warmer based on a single chip microcomputer. The microwave-heating electric warmer comprises a heater and an automatic control device, wherein the heater comprises a microwave generator, a microwave-heating cavity, a heat conducting medium and a warming bag; the automatic control device comprises the single chip microcomputer, a voltage divider resistor, a temperature switch, a power supply, an electronic switch and an external power supply, the single chip microcomputer is connected to the flow divider resistor in parallel; the single chip microcomputer comprises a voltage measuring module, a counting module and a control module; the voltage measuring module is used for measuring voltage at the two ends of the voltage divider resistor; the counting module is used for calculating times that voltage measured by the voltage measuring module reaches a preset threshold value; the control module is used for controlling the electronic switch to switch off when the counting module reaches the preset times. According to the microwave-heating electric warmer, a microwave-heating mode is adopted, so that the heating efficiency is higher than conventional resistor heating efficiency; the automatic control device is arranged for effectively solving the problem that the electric warmer is heated in a circulating mode due to forgetting or un-attending, and avoiding loss of the electric warmer due to circulating heating.

Description

technical field [0001] The invention relates to an electric warmer, in particular to a microwave heating electric warmer based on a single-chip microcomputer. Background technique [0002] With the improvement of people's living standards, electric heaters have become a must-have small household appliance, which can be used for heating, physical therapy, and hot compresses. Because the iron shell was inconvenient to carry in the past, water storage electric heaters have appeared now. The materials are made of Soft or velvet, soft, without any chemical heating agent, no smell, higher thermal efficiency. Compared with northern cities, electric heaters have become a necessity for life in the cold winter. [0003] The electric warmer has a novel shape, large heat storage, long heat preservation time, reasonable structural features, and is easy to use. It is an ideal product for warming hands and feet in winter. At present, electric heaters are divided into two types: electrode...

AI Technical Summary

Problems solved by technology

At present, the production and sales of electrode type electric heaters are prohibited by the state because of the danger of electric leakage and bursting. The electric heating wire type electric heaters with high safety are allowed to continue to be sold.

[0004] However, the heating method of electric heating wire is the most primitive, so the thermal efficiency is also the worst. Usually, the thermal efficiency is only about 70%, and a large amount of heat energy is dissipated into the air.

At the same time, the current electric heating treasure can automatically cut off the circuit to stop heating when the temperature reaches a certain temperature, and can restart heating when the temperature is lower than a certain temperature. However, because the heating time of the electric heating treasure is too long, people often Forget about the electric heater that is being heated, which will cause the temperature of the electric heater to drop for a period of time after heating, and it will be reheated, which will consume electricity and shorten the service life of the electric heater, and there will be safety hazards such as fire

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