Vortex dust collector with logarithic spiral volute bottom

The utility model relates to a dust collector with the twist bottom plate of the volute casing of the logarithmic spiral, the inlet volute casing of which adopts the equation line shape of the logarithmic volute line; an inlet bottom plate is in a twist bottom plate shape; the inlet point of the twist bottom plate is a horizontal bottom plate; as the angular change of the volute casing from 0 to 360 DEG, the internal side of the volute casing can gradually and inwards tilt; when the internal side reaches to the 360 DEG of the volute casing, the internal side of the volute casing is connected with the inlet bottom plate and can mutually form an angle of 90 DEG, and the internal side of the volute casing can become one part of the casing of the dust collector. The dust collector with the twist bottom plate of the volute casing of the logarithmic spiral can make the dust-contained air stream improve the stability of the flow field in the flowing process of the concave surface, and the dust collector with the twist bottom plate of the volute casing of the logarithmic spiral is more in conformity to the requirement of the laminar flow. Accordingly, the efficiency is improved, and the resistance is reduced. When the air quantity is large, the dust collector with the twist bottom plate of the volute casing of the logarithmic spiral can adopt the combination of a plurality of pipes to ensure the dust collecting efficiency.