Air purifier, and dust deposition prevention device and method thereof

Abstract

The invention provides an air purifier, and a dust deposition prevention device and method thereof. The dust deposition prevention device comprises a micro-current sensing module, a voltage control module and a voltage output module, wherein the micro-current sensing module is used for sensing current passing through a dust collecting electrode of the air purifier and outputting micro-current corresponding to the current passing through the dust collecting electrode; the voltage control module is used for comparing the magnitudes of the micro-current and a preset threshold value, and when the micro-current is more than or equal to the preset threshold value, a control signal indicating to reduce voltage applied to the dust collecting electrode is outputted by the voltage control module; the voltage output module is used for reducing the output voltage according to the control signal, so as to reduce voltage applied to a high voltage electrode of the air purifier. According to the scheme provided by the invention, the electric breakdown phenomenon between electrodes and the creepage phenomenon between electrodes and nearby materials, caused when much dust is accumulated on a dust collecting electrode after an air purifier runs for a long time, are prevented.

Description

technical field [0001] The invention relates to the technical field of electrical appliances, in particular to an air purifier and its anti-dust device and method. Background technique [0002] An air purifier refers to a device that can absorb, decompose or transform various pollutants in the air to improve air cleanliness. According to the specific dust removal methods, it can be divided into filter air purifiers and electric dust collection air purifiers. Among them, the electric dust collection air cleaner uses corona discharge to charge the pollutants in the air, and uses the dust collection device to capture the charged particles, so as to achieve the purpose of purifying the air. [0003] use Figure 4 The electrode structure shown illustrates how an ESP air cleaner works. like Figure 4 As shown, the electrode structure of the electric dust collection type air cleaner includes a high voltage electrode 41 and a dust collection electrode 42 . A high voltage is appli...

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Problems solved by technology

[0005] At the same time, when the dust-collecting electrode 42 accumulates a lot of dust during the long-term operation of the air purifier, the distance between the high-voltage electrode 41 and the dust-collecting electrode 42 changes, causing the internal electric field distribution between the two electrodes to be deformed, beyond the controllable The ideal distribution range, which in turn affects the operating performance of the electrostatic precipitator air cleaner

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