Elliptical and funnel-shaped jet nozzle structure

An elliptical and funnel-shaped jet nozzle structure, comprising:

• a plurality of elliptical tapered diversion channels;
• a plurality of elliptical jet nozzle;
• and
• a conveyer belt;
• wherein a wall thickness of each of the elliptical tapered diversion channels is 1-5 mm;
• a wall thickness of each of the elliptical jet nozzles is 1-5 mm;
• and a thickness of the conveyer belt is 1-5 mm;
• the elliptical tapered diversion channel is a hollow elliptical truncated cone comprising an upper opening and a lower opening;
• wherein the upper opening of the elliptical tapered diversion channel is connected to an elliptical opening of an orifice plate of a plenum chamber, and the lower opening of the elliptical tapered diversion channel is connected to an inlet of the elliptical jet nozzle;
• and the elliptical jet nozzle is a hollow elliptical cylinder;
• the plurality of elliptical tapered diversion channels are in a linear arrangement, and a distance between two adjacent elliptical tapered diversion channels is 70-90 mm, the distance being a distance between geometric centers of two elliptic sections of the two adjacent elliptical tapered diversion channels;
• the upper opening of the elliptical tapered diversion channel has an elliptical section with a major axis of 55-65 mm and a minor axis of 40-50 mm;
• and a height of the elliptical tapered diversion channel is 30-50 mm;
• an outlet of the elliptical jet nozzle has an elliptical section with a major axis of 15-25 mm and a minor axis of 4-6 mm;
• and a height of the elliptical jet nozzle is 20-40 mm;
• the conveyer belt is arranged just below the elliptical jet nozzle, and a distance between the conveyer belt and the elliptical jet nozzle is 20-40 mm.