Control circuit and control method for safe power-saving power supply
A power control circuit and control method technology, applied in electrical program control, program control in sequence/logic controllers, etc., can solve the problems of alarming standby power, affecting service life, energy waste, etc., to save energy and ensure use. The effect of electrical safety and avoiding potential safety hazards
Active Publication Date: 2012-05-02
QINGDAO HAIER DRUM WASHING MACHINE
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Problems solved by technology
Such long-term electrification not only affects the service life, but also wastes electric energy, and is also damaged by lightning strikes or overvoltage in power lines.
With the increasing number of home appliances, the standby power consumed by existing home appliances when they are not working is very alarming, resulting in a great waste of energy, and there are also potential safety hazards, which cannot really achieve the purpose of safety and energy saving of home appliances
Method used
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[0018] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:
[0019] Such as figure 1 As shown, a safe power-saving power supply control circuit is to add a switching element K1, a switching element K2 and a manual switch SW1 to the power supply circuit of a household appliance. Among them, the switching element K1 is connected in series on the L line and the N line of the power line to control the L line and the N line to be disconnected or connected at the same time. The switching element K1 uses a double-pole single-throw normally open relay. The switching element K2 is connected in series on the G line in the power line to control the on or off of the G line. The switching element K2 is a single-pole single-throw normally open relay. The manual switch SW1 is connected with the switch element K1 for manual control of its closing.
[0020] The switching element K1 and the switching element K2 are connected to...
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The invention relates to a control circuit and a control method for a safe power-saving power supply. A switch element K1 for controlling an L line and an N line to be switched off or switched on simultaneously is connected in series to an L line circuit and an N line circuit in a household electrical appliance power line; a switch element K2 is connected in series to a G line circuit in the power line; and conduction of the switch element K1 and the switch element K2 is controlled by using a direct-current power supply circuit in a household electrical appliance to further control the switch-on and switch-off of the L line, the N line and the G line in the power line. In the invention, electrification is not required when the L line and the G line of the household electrical appliance power line are connected reversely, so that dangerous accidents are avoided effectively, and the power utilization safety is ensured. Meanwhile, three paths of leads can be switched off in time when the household electrical appliance is in the idle state, so that zero standby power consumption is realized, potential safety hazard is avoided, and a large amount of energy is saved.
Description
Technical field [0001] The invention relates to a power supply circuit, in particular to a safe power-saving power supply control circuit and control method, and belongs to the technical field of power supply control circuits. Background technique [0002] With the development of society, the number of household appliances is increasing. When the power plug of the existing household appliances is inserted into the live socket, the electric control panel will be charged; and when the operation of the household appliances is over, the electric control panel of most household appliances is still connected. Power on. Such long-term electrification not only affects the service life, but also wastes electric energy, and also suffers from lightning strikes or overvoltage in the power line. With the ever-increasing number of home appliances, the standby power consumed by the existing home appliances when they are not working is very alarming, resulting in a huge waste of energy. At the ...
Claims
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IPC IPC(8): G05B19/04
Inventor 陈玉玲许升孙书波王金凯
Owner QINGDAO HAIER DRUM WASHING MACHINE