Automatic household power supply switch having electricity limiting function and anti-lightning function

Abstract

The invention relates to an automatic household power supply switch having an electricity limiting function and an anti-lightning function, which consists of a switch circuit, a load unit, a sensing circuit, a first discrimination circuit, a first execution circuit, a second discrimination circuit, a second execution circuit and a direct-current power supply, and is characterized in that: the switch circuit, the load unit and the sensing circuit are sequentially and serially connected into an alternative-current (AC) 220V power transmission circuit; the output of the sensing circuit is connected with the first discrimination circuit and the second discrimination circuit; the output of the first discrimination circuit is connected with the first execution circuit; and the output of the second discrimination circuit is connected with the second execution circuit. When any electric appliance in a house is turned on, the automatic household power supply switch is closed to automatically supply the power (i.e. powered-on supply); and when all electric appliances in the house are turned off and stopped, the automatic household power supply switch can be automatically disconnected to power off (i.e. stopping power off); and when the household power consumption is overloaded or stroke by the lightning, the automatic household power supply switch can automatically disconnect an external power transmission circuit. By utilizing the switch, three effects such as power conservation, safety utilization of power supply and lightning resistance can be realized.

Description

technical field [0001] The invention relates to the field of low-voltage electrical appliances, in particular to a domestic automatic power switch with the functions of power limiting and anti-lightning. Background technique [0002] General households have refrigerators, color TVs, air conditioners, electric lights and other electrical appliances. Among the electrical appliances described above, color TVs, air conditioners, etc. have remote control capabilities. After they are turned off by remote control, although the power supply of the host machine is turned off, the power supply for remote control (hereinafter referred to as the remote control power supply) is still powered on, and each color TV or air conditioner is still powered on. There is power consumption of the remote control power supply of about 6W (hereinafter referred to as "standby power consumption"). [0003] With the progress of the times, many families have Internet "routers", and the routers of most fa...

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Problems solved by technology

[0009] (2) After selecting the resistance value of the sampling resistor R1, if a 1.5-horsepower air conditioner with a rated power of 1102.5W is inserted separately, the voltage drop on the sampling resistor R1 is 27.23V and the power is 119.59W (when calculating the data, it has been In this case, the sampling resistor R1 and the triode BG must be damaged!

[0014] According to the power supply method in our country, the municipal power grid does not install limit appliances for household AC220V power supply. Once the household electricity is overloaded, it is very easy to cause the wires to catch fire.

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