Ac power source detection method of bousehold appliance standby circuit supplied by battery
A technology of AC power supply and household appliances, which is applied in the field of power detection circuit, can solve problems such as battery power exhaustion and failure, and achieve the effect of simple circuit
Inactive Publication Date: 2006-09-20
陈俊峰
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Problems solved by technology
[0002] In the invention patent application number 200510093540.X, in the power supply of the standby circuit of household appliances, if the AC power supply suddenly cuts off when the household appliance is in normal use, the standby circuit is still in the state of battery power supply, which may easily cause the circuit failure of battery power exhaustion Phenomenon
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Embodiment Construction
[0007] The invention relates to an AC power detection method of a battery-powered household appliance standby circuit, which uses an optocoupler to sample an AC power input signal, isolates and transmits the signal to a CPU power detection terminal for processing. Usually, a very simple capacitive current-limiting power supply method is used to supply the internal light-emitting tube of the optocoupler to work. The CPU of the household appliance in the standby state controls its power control output terminal according to the output state of the optocoupler to prevent the standby battery from running out.
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This invention relates to battery supply household appliances circuit AC power supply detecting method. AC power supply input signal is sampled by light coupler and separately transferred to CPU power detecting end for processing. Simple capacitance current limiting power supply method is used to supply the light coupler inner luminotron working at normal occasion, house appliances at alert state controls its power supply control output end according to the light coupler state to prevent alert battery exhausting its electric energy.
Description
technical field [0001] The invention relates to household appliances, in particular to a power detection circuit. Background technique [0002] In the invention patent application number 200510093540.X, in the power supply of the standby circuit of household appliances, if the AC power supply suddenly cuts off when the household appliance is in normal use, the standby circuit is still in the state of battery power supply, which may easily cause the circuit failure of battery power exhaustion Phenomenon. In the above application, a method for detecting the state of AC power by using an optocoupler invented by the present inventor was disclosed, and the application was filed again because the novelty grace period of the patent law did not exceed. Contents of the invention [0003] The purpose of the present invention is to provide a simple, low-cost, long-time reliable AC power detection circuit, so that it can achieve the micro-power consumption standby purpose of househol...
Claims
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Inventor 陈俊峰
Owner 陈俊峰
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