Patent ID: 8813679

Claim:
A paint mist collecting device for use in a paint booth for collecting a mist of paint particles produced when a paint is sprayed onto a workpiece within the paint booth while air containing the paint mist and a cleaning liquid are allowed to flow out from an outlet formed at a bottom part of the paint booth, the paint mist collecting device comprising: a tubular duct having one end adapted to be connected to the outlet of the paint booth; and a swirl-generating guide fin unit disposed inside the tubular duct and configured to force axial flows of the paint-mist-containing air and the cleaning liquid into a rotational movement to thereby generate a helical vortex as the paint-mist-containing air and the cleaning liquid flow downward along the tubular duct, wherein the swirl-generating guide fin comprises a plurality of guide fins projecting from an inner surface of the tubular duct and circumferentially spaced at equal intervals, the guide fins being skewed with respect to a longitudinal axis of the tubular duct in a direction to form a clockwise or a counter-clockwise swirl flow of the paint-mist-containing air and the cleaning liquid.