Standby circuit for household appliances
A technology for standby circuits and household appliances, applied in electrical components, electronic switches, pulse technology, etc., can solve problems such as poor reliability, high power consumption, and prone to failures, to improve standby reliability, reduce power consumption, reduce The effect of standby power consumption
Active Publication Date: 2017-08-25
临沂高新区金迪科技信息服务中心
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- Application Information
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Problems solved by technology
Due to the unreasonable design of the current standby circuit, there are often two problems: 1. The power consumption is relatively large, resulting in waste
2. The reliability is poor, and it is prone to failure when the power supply voltage is abnormal
Method used
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Embodiment Construction
[0013] Below in conjunction with accompanying drawing, the present invention is described in further detail:
[0014] A standby circuit for household appliances of the present invention includes a control circuit, a power supply circuit and an overvoltage protection circuit; the overvoltage protection circuit includes a protection branch connected in parallel on the power supply, and the protection branch is composed of a capacitor C1, a light emitting diode D2, a diode D1, Resistor R2 and resistor R1 are connected in series, capacitor C1 is connected in parallel with resistor R3; the power supply circuit includes a power supply branch connected in parallel on the power supply, and the power supply branch is composed of diode D3, capacitor C2 and resistor R4 in series, and diode D3 is connected in parallel with diode D4 and capacitor A series branch composed of C3; the control circuit includes triode Q1, triode Q2 and triac QK, the base of triode Q1 is connected with a series b...
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The invention discloses a standby circuit for household electric appliances. The standby circuit comprises a control circuit, a power circuit and an overvoltage protection circuit. The power circuit of a main unit is switched off instead of being switched on and is controlled by the control circuit which comprises triodes Q1 and Q2, resistors R6, R7, R8, R9 and R10 and a bidirectional thyristor QK, and accordingly power consumption of circuits of the main unit can be prevented in standby periods. The standby circuit has the advantages that a power source of the main unit can be automatically switched off when the corresponding electric appliance stops working or voltages of the power source are higher than rated values, so that power consumption can be reduced, and the circuits of the main unit can be protected; the power consumption is lower than 0.01 watt in the standby periods, and overvoltage protection effects can be realized even under the condition that voltages reach 400 volts; the standby circuit is applicable to the various household electric appliances such as washing machines, induction cookers, desktop computers and microwave ovens which are not provided with remote controls, accordingly, the standby power consumption can be reduced, and the standby reliability can be improved.
Description
technical field [0001] The invention relates to a standby circuit for household appliances. Background technique [0002] At present, with the global improvement of energy efficiency and the increasing awareness of energy conservation and emission reduction, improving power conversion efficiency and reducing standby power consumption have become the focus of the industry. After the household appliance is turned off, its power circuit is still working for the convenience of the next startup, which is called standby. The present standby circuit often has two problems because of unreasonable design: 1. The power consumption is relatively large, resulting in waste. 2. The reliability is poor, and it is prone to failure when the power supply voltage is abnormal. Contents of the invention [0003] In order to solve the above technical deficiencies, the present invention provides a standby circuit for household appliances with high reliability and low power consumption. [000...
Claims
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IPC IPC(8): H03K17/08
Inventor 李长溪
Owner 临沂高新区金迪科技信息服务中心