FILTER UNIT AND PLATING APPARATUS INCLUDING SAME
Provided is a filter unit including: a cyclone body member which receives fluid introduced thereinto in one direction and has a circular internal sectional shape to form a rotational flow of the fluid; and a discharge member which is disposed on a central upper end portion of the cyclone body member and has a cross section, at least a part of which has a noncircular shape, so as to reduce the rotational flow and then discharge the fluid.
1 . A filter unit comprising:
a cyclone body member receiving a fluid introduced thereinto in one direction and having an internal circular cross section, to form a rotational flow of the fluid; and
a discharge member disposed on a central upper end portion of the cyclone body member and having at least a portion of which a cross section has a noncircular shape, to reduce the rotational flow of the fluid and then discharge the fluid.
2 . The filter unit of claim 1 , wherein the discharge member has a lower end coupled to the cyclone body member, the lower end having a circular cross section, and an upper end through which the fluid is discharged, the upper end having a non-circular cross section.
3 . The filter unit of claim 2 , wherein the upper end of the discharge member, through which the fluid is discharged, has an elliptical cross section.
4 . The filter unit of claim 1 , wherein the discharge member has a cylindrical shape of which a cross section has an elliptical shape.
5 . The filter unit of claim 4 , wherein the elliptical shape of the cross section of the discharge member has a minor axis length of 0.2 to 0.8 times a major axis length.
6 . The filter unit of claim 1 , wherein the discharge member comprises:
a hose portion provided on the central upper end portion of the cyclone body member, having a circular cross section, and formed of a flexible material; and
a clamping portion provided in contact with an outer surface of the hose portion and pressing a portion of the hose portion in such a manner that at least a portion of the hose portion has a non-circular cross section.
7 . The filter unit of claim 6 , wherein the clamping portion comprises:
a coupling shaft coupled to the cyclone body member and disposed to be parallel to the hose portion;
one pair of swing fingers having one end pin-coupled to the coupling shaft and provided on both sides of the outer surface of the hose portion; and
a driving motor fixed to the cyclone body member and threadedly engaged with a thread groove of the other end of the pair of swing fingers having threads formed in different directions.
8 . The filter unit of claim 7 , wherein the pair of swing fingers have a curved central portion contacting the hose portion.
9 . A plating apparatus comprising:
the filter unit of any one of claim 1 ;
a crucible unit connected to the filter unit and supplying plating vapor as a fluid to the filter unit; and
a nozzle unit connected to the discharge member of the filter unit and spraying plating vapor discharged from the filter unit to a steel sheet.