Delay safety circuit

Abstract

The invention relates to a delay safety circuit, and the circuit comprises a transformer (1), a delay circuit (2), a relay (1) and an access part (4), wherein a primary coil L1 of the transformer (1)is connected to two ends of the commercial power; the delay circuit (2) is connected to a secondary coil L2 of the transformer (1); a coil of the relay (1) is connected with the delay circuit (2); a contact group of the relay (1) and the access part (4) are connected in series to two ends of the commercial power; the delay circuit (2) comprises a diode D2 for increasing the delay time of the delaycircuit. According to the invention, the delay safety circuit provided by the invention is simple in structure; the delay circuit can be used at the front end of each electric appliance connected tothe commercial power, and the delay time can be changed by changing the resistance values of the resistors at the front ends of different electric appliances, so different electric appliances can be connected to the power supply after different delay time, instantaneous large current caused by simultaneous connection of a plurality of electric appliances to the power supply is avoided, and household power utilization is safer.

Description

technical field [0001] The invention belongs to the field of circuit design, in particular to a delayed safety circuit. Background technique [0002] Nowadays, with the improvement of people's quality of life, people's material life is becoming more and more abundant, and the demand for electrical equipment used is also increasing. Household appliances mainly refer to various electrical appliances and electronic appliances used in homes and similar places. Also known as civil appliances, household appliances. Household appliances liberate people from heavy, trivial and time-consuming housework, create a more comfortable and beautiful living and working environment that is more conducive to physical and mental health, and provide rich and colorful cultural and entertainment conditions. necessities of life. [0003] At present, the use of electrical appliances has become an essential part of people's lives, whether in a working environment or at home, people use electrical ...

AI Technical Summary

Problems solved by technology

[0004] However, when people use electrical appliances at home, they may encounter a sudden power failure. In this case, people often forget to turn off the running electrical appliances

In this way, after a sudden call, all the electrical appliances that are not turned off will start to run directly, and the household circuit will be overloaded for an instant, which will cause the instantaneous current to be too large. electrical appliance or fire

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