Air conditioner and power supply control circuit of fan for air conditioner

Abstract

The invention discloses an air conditioner and a power supply control circuit of a fan for the air conditioner. The circuit comprises a rectifier unit, a filtering and voltage-stabilizing unit, a current limiting unit, a half-wave voltage sampling unit and a controller, wherein an input end of the rectifier unit is connected with an AC power supply to rectify an AC provided by the AC power supply into a pulsating DC; the filtering and voltage-stabilizing unit is connected with an output end of the rectifier unit and carries out filtering and voltage-stabilizing treatment on the pulsating DC to output the DC to the fan; the current limiting unit is used for limiting an impact current of a power supply loop of the fan; the half-wave voltage sampling unit is connected with the input end of the rectifier unit and carries out half-wave sampling on the AC to obtain a voltage sampling value; the controller is connected with the current limiting unit and the half-wave voltage sampling unit respectively and controls the current limiting unit to work when abnormal power-off of the AC power supply is judged according to the voltage sampling value to limit the impact current caused by instant power-up after abnormal power-off of the AC power supply, so that the boot failure of the fan caused by an over-high impact current is prevented; and the damage to a circuit component caused by the over-high impact current is prevented.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to a fan power control circuit and an air conditioner with the circuit. Background technique [0002] In the air conditioner of the related art, during the operation of the fan, the AC power supply may be powered on after a brief abnormal power failure. However, the relevant technology does not take an effective way to deal with the impact of re-powering the AC power supply after power failure, such as figure 1 As shown, a large inrush current ic' will be generated in the circuit, which will easily cause the fan to fail to start, and even cause damage to the circuit components. [0003] Therefore, related technologies need to be improved. Contents of the invention [0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to provide a power control circuit ...

AI Technical Summary

Problems solved by technology

However, the relevant technology does not take an effective way to deal with the impact of re-powering the AC power supply after power failure, such as figure 1 As shown, a large inrush current ic' will be generated in the circuit, which will easily cause the fan to fail to start, and even cause damage to the circuit components.

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