Method for improving safety performance of electric blanket

Abstract

The invention relates to a method for improving the safety performance of an electric blanket. The following steps are used: (1) a DC isolated power supply is used outside the blanket body so that theoutput voltage is lower than 36V without radiation; (2) a controller connected with the blanket body feeds back the temperature of the blanket body collected by multiple high-precision temperature sensors arranged in the blanket body to the MCU operation control unit of the controller for data analysis, temperature control of the heating wire is realized by using on / off of the MOS switch of a duty cycle control circuit module and the adjusting state is displayed through a controller liquid crystal screen; and (3) the Vref chip of the control circuit module of the MCU operation control unit realizes that the voltage rises from U1 to the safety voltage range of U2 within an instant. The DC isolated power supply is used so as to fundamentally solve the hidden danger of electric shock of thehuman body without radiation; the precision of temperature sampling can reach + / -0. 5 DEG C by temperature sampling sensors; and operation and control are simple and intelligentization can be realized.

Description

technical field [0001] The invention relates to the technical field of electric heating, in particular to a method for improving the safety performance of an electric heating blanket, which can fundamentally solve the hidden danger of human body electric shock caused by the electric heating blanket, and the output direct current does not have an alternating magnetic field. Background technique [0002] Electric blanket is an electric heating appliance. When in use, it is accompanied by the user for a long time and in close contact with the body. Obviously, this will cause some safety hazards, especially for some special users, such as pregnant women, children, the elderly, etc. Can't use the electric blanket with confidence. [0003] If on the basis of ensuring safety performance, the electric blanket can be used to maximize its advantages, for example, it has a good protective effect on people with rheumatism and can reduce the chance of seizures, and for the elderly or peo...

AI Technical Summary

Problems solved by technology

[0005] ⑴Traditional electric blankets generally use high-voltage 220V heating wires for power supply and there are potential electric shock hazards in direct contact with the human body;

[0006] (2) The use of power frequency 50Hz alternating current will produce relatively large radiation (>200mGS), which will affect the secretion of human hormones, and long-term use will cause harm to human health;

[0007] (3) The temperature control method adopted is simple and the control accuracy is low. After use, there will be discomfort symptoms such as dry mouth, getting angry, and fatigue;

[0008] ⑷Lack of perfect abnormal protection measures, safety accidents such as smoke and fire cannot be avoided during application

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