Patent ID: 11968769
Assignee: HANGZHOU CITY UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC H  Y | IPC H

Claim 2:
3. The dielectric barrier discharging tube according to claim 1, wherein a diameter of an end of the outer channel (502) disposed near the corresponding discharging needle (4) is greater than a diameter of another end of the outer channel (502) disposed away from the corresponding discharging needle (4); a diameter of an end of the inner channel (503) disposed near the corresponding discharging needle (4) is greater than a diameter of another end of the inner channel (503) disposed away from the corresponding discharging needle (4);
when the gas passes through the catalytic block (5) located at the front of the discharging needle (4), the diameters of the outer channel (502) and the inner channel (503) gradually increase, a flowing rate of the gas gradually decreases, and a time length of the gas staying at the discharging region where the corresponding discharging needle (4) is located is prolonged;
when the gas passes through the catalytic block (5) located at the back of the discharging needle (4), the diameters of the outer channel (502) and the inner channel (503) gradually decrease, the flowing rate of the gas gradually increases, a gas mixing effect of the U-shaped flow field is improved.