Double-shielded constant-temperature electric heating carpet

Abstract

The invention discloses a double-shielded constant-temperature electric heating carpet. The carpet comprises a hot wire layer (5), a temperature sensor Rt (6), an electric shielding layer (2), a magnetic shielding layer (3), a first anti-flaming layer (4) and a control circuit, wherein the hot wire layer (5) is arranged between a carpet surface layer (1) and a carpet bottom layer (8), and the control circuit is connected with the hot wire layer (5); a step-down rectifying circuit, a solid-state switch and a PID (Proportion Integration Differentiation) controller are arranged in the control circuit; the solid-state switch and the input end of the step-down rectifying circuit are connected with an AC (Alternating Current) power supply, and the step-down rectifying circuit provides the power supply to the PID controller through a solid-state switch; the output end of the solid state switch is connected with a hot wire R; and the output end of the PID controller is connected with the temperature sensor Rt. According to the double-shielded constant-temperature electric heating carpet provided by the invention, the consistency of heating temperature can be ensured, the usage requirements can be met, and the using comfort can be improved; meanwhile, the noise in the use can be eliminated; in addition, the double-shielded constant-temperature electric heating carpet has the functions of electric leakage, over-current and overload protection, thereby guaranteeing the safety protection performance during use.

Description

technical field [0001] The invention relates to a carpet, in particular to a double shielding constant temperature electric heating carpet. Background technique [0002] Carpet is a kind of ornament commonly used in daily life, in order to play the effect of heating and heat preservation in cold winter, there are some ways that adopt resistance wire to be added in the carpet at present, have realized the effect of carpet heating and heat preservation. However, due to the simple structure of some common electric heating carpets on the market at present, it is impossible to pre-set the temperature and ensure the constant temperature, and cannot satisfy the comfort of use; A certain inductance is formed due to the wiring reasons, and AC noise will be generated when the 220V AC voltage is passed, and then noise pollution will be caused in a quiet use environment, which cannot meet the use requirements; and most of the existing heating carpets lack leakage, over-current, and over...

AI Technical Summary

Problems solved by technology

However, due to the simple structure of some common electric heating carpets on the market at present, it is impossible to pre-set the temperature and ensure the constant temperature, and cannot satisfy the comfort of use; A certain inductance is formed due to the wiring reasons, and AC noise will be generated when the 220V AC voltage is passed, and then noise pollution will be caused in a quiet use environment, which cannot meet the use requirements; and most of the existing heating carpets lack leakage, over-current, and overload. Protection function, the safety protection effect is poor, and the safety performance during use cannot be guaranteed

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