NITROGEN AND AIR SUPPLY CONTROL APPARATUS AND METHOD OF THE AIR KNIFE

摘要

The present invention relates to a device to control supply air of an air knife comprising: a chamber (110) installed in one side of a blower (20); a nitrogen inlet pipe connected to the chamber (110), supplying nitrogen; an opening and closing part formed on one side of the chamber (110), supplying external air to the inside the chamber (110) or cutting off the external air; an opening and closing valve (130) connected to a nitrogen inlet pipe (10) to supply or cut off the nitrogen; and a valve (140) installed in an other side of the chamber (110), supplying external air inside the chamber (110) or discharging the internal air to the outside in accordance to an internal pressure of the chamber (110). The present invention improves work efficiency by stabilizing a change in pressure of nitrogen or air supplied to the air knife in a short time.