Treatment liquid spray nozzle
The present disclosure relates to a treatment liquid spray nozzle including: a body having a mixing space portion formed therein to mix a first treatment liquid and a second treatment liquid, a first inlet communicating with the mixing space portion in such a way as to allow the first treatment liquid to flow into the mixing space portion, a second inlet communicating with the mixing space portion in a misaligned direction with the first inlet in such a way as to allow the second treatment liquid to flow into the mixing space portion, and a spray hole formed on the bottom thereof in such a way as to communicate with the mixing space portion; and a rotational flow guiding part disposed in the mixing space portion in such a way as to allow both ends thereof to face the first inlet and the spray hole, while allowing the sectional area toward the spray hole to be smaller than the sectional area toward the first inlet.
1 . A treatment liquid spray nozzle comprising:
a body having a mixing space portion formed therein to mix a first treatment liquid and a second treatment liquid, a first inlet communicating with the mixing space portion to allow the first treatment liquid to flow into the mixing space portion, a second inlet communicating with the mixing space portion in a misaligned direction with the first inlet to allow the second treatment liquid to flow into the mixing space portion, and a spray hole formed on the bottom thereof to communicate with the mixing space portion; and
a rotational flow guiding part disposed in the mixing space portion to allow both ends thereof to face the first inlet and the spray hole, while allowing a sectional area toward the spray hole to be smaller than a sectional area toward the first inlet,
wherein on top of the rotational flow guiding part is located a first perforated plate to be coupled to an inner peripheral surface of the mixing space portion, on underside of the rotational flow guiding part is located a second perforated plate to be coupled to the inner peripheral surface of the mixing space portion, and the second inlet is located under the first perforated plate.
2 . The treatment liquid spray nozzle according to claim 1 , wherein the mixing space portion comprises:
a first mixing space portion extending from the first perforated plate to the underside of the rotational flow guiding part;
a second mixing space portion extending from the underside of the first mixing space portion to top of the spray hole; and
a third mixing space portion extending from top of the spray hole to underside of the spray hole,
whereby the second perforated plate to which the rotational flow guiding part is coupled is located on the entrance of the second mixing space portion, and the third perforated plate is located on the entrance of the spray hole.
3 . The treatment liquid spray nozzle according to claim 2 , wherein the entrance of the second mixing space portion has a larger cross-sectional area than the entrance of the spray hole.
4 . The treatment liquid spray nozzle according to claim 1 , wherein the rotational flow guiding part has a spiral protrusion or groove extending in up and down directions and formed on an outer peripheral surface thereof.
5 . The treatment liquid spray nozzle according to claim 1 , wherein the mixing space portion of the body that extends from the first perforated plate to the underside of the rotational flow guiding part has a spiral protrusion or groove extending in up and down directions and formed on the inner peripheral surface thereof.
6 . The treatment liquid spray nozzle according to claim 1 , wherein the rotational flow guiding part comprises a first inside inlet hole extending from top facing the first inlet to the interior thereof in up and down directions and a plurality of first inside outlet holes branched from the first inside inlet hole toward the mixing space portion.
7 . The treatment liquid spray nozzle according to claim 6 , wherein the first inside inlet hole is formed at a position facing the first inlet.
8 . The treatment liquid spray nozzle according to claim 1 , wherein the body comprises a second inside inlet hole extending from one end facing a space above the first perforated plate to the interior thereof in up and down directions and a plurality of second inside outlet holes branched from the second inside inlet hole toward the mixing space portion.
9 . The treatment liquid spray nozzle according to claim 1 , wherein the rotational flow guiding part comprises a first inside inlet hole extending from top facing the first inlet to the interior thereof in up and down directions and a plurality of first inside outlet holes branched from the first inside inlet hole toward the mixing space portion, and the body comprises a second inside inlet hole extending from one end facing a space above the first perforated plate to the interior thereof in up and down directions and a plurality of second inside outlet holes branched from the second inside inlet hole toward the mixing space portion.
10 . The treatment liquid spray nozzle according to claim 1 , wherein a flow rate of the first treatment liquid is smaller than a flow rate of the second treatment liquid.
11 . The treatment liquid spray nozzle according to claim 1 , wherein the first to third perforated plates are made of plates or mesh type plates each having a plurality of through holes.