Power supply switch and control device for implementing nought power consumption standby

Abstract

The invention relates to a power switch for realizing zero standby power consumption and a control device. The control device comprises an SCM and a power switch connected between controlled equipment and an input power; the interior of the power switch is provided with a coil and an iron core. After the SCM receives the instruction of startup or shutdown, an instant impulse signal is output for controlling the conduction of a drive switch; an instant impulse current is generated in the coil of the power switch; the iron core under the effect of the magnetic force generated by the coil connects or disconnects the input power of the controlled equipment. Aiming at solving the disadvantage that the realization of zero standby power consumption increases extra power consumption of the prior art in normal working hours, thereby being unable to realize real effect of energy saving, the invention provides the power switch for realizing zero standby power consumption and the control device, and therefore, in standby state or in normal working state, no current passes through the coil of the power switch, realizing real zero power consumption and energy saving.

Description

technical field [0001] The invention relates to household appliances, more specifically, to a power switch and a control device for realizing zero-power consumption standby. Background technique [0002] In the current household appliances such as TV sets, users mostly turn off the power through the remote control, which is what we often call "standby". In this case, the power supply, remote control receiving and microprocessor parts in the machine still keep working to ensure that the electrical appliances can be woken up from the remote control or the light touch button on the machine next time. The power supply and microprocessor are designed for the whole system under full load, and the power consumption after standby is still maintained at a relatively high level. In addition, the circuit of the whole machine is connected to the power grid when it is in standby, so there are certain safety hazards, such as fire or explosion caused by lightning strike or overvoltage. R...

AI Technical Summary

Problems solved by technology

The disadvantage is that the cost is high, and it is difficult to achieve a power consumption below 1W. In addition, the AC circuit is not cut off during standby, and intrinsic safety cannot be achieved;

[0004] 2. In the standby state, change the oscillation mode of the switching power supply and cut off most of the circuit work after standby to reduce power consumption. Most current electrical appliances use this method, and its disadvantages are the same as above;

[0006] a. The power consumption of one or two sets of coils is increased (some patents use an intermediate relay plus a power relay). This coil needs to be applied with voltage to keep it closed during operation, but this power consumption cannot be ignored during operation, such as driving AC The power consumption of the 250V / 5-8A electric shock relay in the main circuit is between 0.4W and 0.8W. In normal operation, it increases the power consumption of 0.3-0.5W×2, so this is a false energy saving, which cannot achieve the real energy saving effect;

[0007] b. In this method, after the voltage on the battery or capacitor is exhausted, a special switch is required to force the power on, which makes the user's operation complicated;

[0008] c. Only after the original push-button power switch is closed can the remote controller be used to switch on and off the machine. When the push-button power switch is in the off state, you can only go to the front and press it with your hands if you want to turn it on. It does not achieve perfect operability. , that is, at any time, the user can use any one of the power button, remote control, and lightly touch the standby button to turn it on or off, regardless of the state of the controlled device;

[0009] d. The added circuits and parts increase the failure rate and unreliability of the controlled equipment, especially when the battery is self-discharging, the contacts and coils of the relay are easily overheated and burned when they are energized for a long time, and the single-chip microcomputer may be disturbed and malfunction. Due to the feature of "adding a normally open contact of a relay connected in series in the AC circuit" similar to this technology, once any part fails, all functions of the controlled equipment will be lost and cannot be turned on;

[0010]4. Add a small single-chip microcomputer specially for infrared remote control processing. After judging that the command is correct, connect or cut off the original AC circuit through the electromagnetic relay. The processing process is the same as the method 3 is very similar, but the power supply of the single-chip microcomputer is obtained by rectifying and filtering the AC power. Since the single-chip microcomputer is very power-saving, this method can achieve a standby power below 0.1-1W. Since its core technology is similar to method 3, its disadvantages are also similar, except No battery or capacitor drain issues

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