Switching circuit free of standby power consumption

Abstract

The invention discloses a switching circuit free of standby power consumption. The switching circuit is characterized by comprising an MCU (microprogrammed control unit) control circuit, a circuit switch control circuit and a voltage-stabilized power circuit for supplying power for the MCU control circuit, the circuit switch control circuit comprises a key switch and a bidirectional silicon controlled rectifier, two main terminals of the bidirectional silicon controlled rectifier are serially connected into an AC power supply circuit, and a control electrode of the bidirectional silicon control rectifier is connected with the key switch by a load; the voltage-stabilized power circuit is positioned in the AC power supply circuit and supplies power for the MCU control circuit; and the MCU control circuit is connected with the circuit switch control circuit and can trigger the bidirectional silicon controlled rectifier according to level signals of the key switch. The switching circuit is simple in structure, free of standby power consumption and long in service life, and is low in manufacturing cost as the silicon controlled rectifier and a single chip microcomputer are used as core control devices.

Description

technical field

[0001] The invention relates to a household appliance standby control circuit, in particular to a switch circuit without standby power consumption. Background technique

[0002] At present, the standby power consumption of most electrical products on the market is 3W-26W. Their high-power standby not only consumes electricity, but also the heat generated during standby may cause fire hazards. According to statistics from international authoritative organizations, standby energy consumption has accounted for 3% to 13% of civilian power consumption, accounting for about 2% of total power generation. There are a large number of home appliances in my country, and the total standby energy consumption is huge. According to the Deputy Secretary-General of China Power Supply Association: Even in western countries that pay great attention to energy saving, the standby loss is a considerable figure. According to the statistics of the United States, this kind of loss ...

Examples

Embodiment

[0013] Example: such as figure 1 The switch circuit without standby power consumption shown includes an MCU control circuit, a circuit switch control circuit, and a regulated power supply circuit for supplying power to the MCU control circuit. The circuit switch control circuit includes a key switch and a bidirectional thyristor. The two main terminals are connected in series in the AC power supply circuit, and its control pole is connected to the key switch through the load; the stabilized power supply circuit is located in the AC power supply circuit, and supplies power to the MCU control circuit; the MCU control circuit is connected to the circuit switch control circuit, which can be switched according to the The level signal triggers the bidirectional thyristor. When the key switch K1 is pressed, the circuit where the key switch K1 and the bidirectional thyristor are located is turned on, the two main terminals of the bidirectional thyristor are turned on, the whole cir...

technical field

[0001] The invention relates to a household appliance standby control circuit, in particular to a switch circuit without standby power consumption. Background technique

[0002] At present, the standby power consumption of most electrical products on the market is 3W-26W. Their high-power standby not only consumes electricity, but also the heat generated during standby may cause fire hazards. According to statistics from international authoritative organizations, standby energy consumption has accounted for 3% to 13% of civilian power consumption, accounting for about 2% of total power generation. There are a large number of home appliances in my country, and the total standby energy consumption is huge. According to the Deputy Secretary-General of China Power Supply Association: Even in western countries that pay great attention to energy saving, the standby loss is a considerable figure. According to the statistics of the United States, this kind of loss ...

Examples

Embodiment

[0013] Example: such as figure 1 The switch circuit without standby power consumption shown includes an MCU control circuit, a circuit switch control circuit, and a regulated power supply circuit for supplying power to the MCU control circuit. The circuit switch control circuit includes a key switch and a bidirectional thyristor. The two main terminals are connected in series in the AC power supply circuit, and its control pole is connected to the key switch through the load; the stabilized power supply circuit is located in the AC power supply circuit, and supplies power to the MCU control circuit; the MCU control circuit is connected to the circuit switch control circuit, which can be switched according to the The level signal triggers the bidirectional thyristor. When the key switch K1 is pressed, the circuit where the key switch K1 and the bidirectional thyristor are located is turned on, the two main terminals of the bidirectional thyristor are turned on, the whole cir...

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