The present invention relates to an electric dust collector of an automatic steam cleaning method. The electric dust collecting device includes at least one dust collecting filter 12_1 to 12_N in which a plurality of dust collecting electrodes installed on the dust collecting frame F are disposed; A steam supply module 13 for flowing steam along the outer surface of the at least one dust collecting filter 12_1 to 12_N; And a fire extinguishing gas supply unit capable of spraying fire extinguishing gas into the interior of the dust collecting frame F.
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