Intelligent socket and safety protection control method

Abstract

The invention relates to the technical field of intelligent sockets, and provides an intelligent socket for realizing accurate leakage protection during electric leakage. The intelligent socket comprises a live wire current acquisition module, a zero line current acquisition module, a logic control module and an output control module, wherein the output control module is used for turning off the output power supply of the intelligent socket to an electric appliance when the electric leakage judgment result of the logic control module is electric leakage. The invention discloses a safety protection control method, which comprises the steps of 1, acquiring live line / zero line current Iac and zero line / live line current I'ac of a power supply end of an electric appliance in real time; and 2, if the absolute value of (Iac-I'ac) is greater than A1, judging that the controlled electric appliance leaks electricity, and turning off an output power supply of the intelligent socket to the electric appliance, wherein A1 is a preset earth leakage protection threshold value, and A1>A2. By adopting the mode, accurate leakage protection during leakage is realized, and the circuit is simple in structure and low in manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of smart sockets, in particular to a smart socket and a safety protection control method. Background technique [0002] With the development of the Internet of Things, people's demand for smart sockets is increasing day by day, but none of the smart sockets currently on the market have leakage protection functions. [0003] The usual way to implement leakage protection current is to add a current transformer to the single-phase power line, and realize leakage protection by sensing the current imbalance between the two lines of the single-phase power supply. This method has low detection accuracy and is bulky. [0004] At present, there are more and more household appliances, and most of the households only have leakage protectors. When electrical leakage occurs, the leakage protector will cut off the power supply of all electrical appliances in the home, which brings inconvenience to users; or there are mult...

AI Technical Summary

Problems solved by technology

[0003] The usual way to implement leakage protection current is to add a current transformer to the single-phase power line, and realize leakage protection by sensing the current imbalance between the two lines of the single-phase power supply. This method has low detection accuracy and is bulky

[0004] At present, there are more and more household appliances, and most of the households only have leakage protectors. When electrical leakage occurs, the leakage protector will cut off the power supply of all electrical appliances in the home, which brings inconvenience to users; or there are multiple leakage protectors. However, the threshold value of leakage protectors is generally 30mA. Once electrical leakage occurs, multiple protectors may trip at the same time, and targeted tripping cannot be achieved.

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