2results about How to "Guaranteed wind pressure" patented technology

The application discloses a double-layer wind-locking large fan, and aims at solving the problem that when the welding quality cannot reach the technical requirement or the flange plate and the air inlet I or the annular bottom plate and the left side plate are not connected tightly, external airflow is easily led into the fan, thereby affecting the air pressure of the fan. The left side plate (4) outwardly connected with the sealing plate (8) on the surface of the support frame (9) is adopted, and the sealing plate (8), the support frame (9) bottom plate and the left side plate (4) are sleeved on the air inlet II (7) of the impeller (3).

A warmer structure comprises a box body and a cover plate, the cover plate covers the box body in a sealing mode, a box body partition plate is further arranged in the box body, and the box body partition plate divides the box body into a ventilation area and a warming area. A first volute is arranged in the heating area, and the left end and the right end of the first volute communicate with warm air channels correspondingly. The box body partition plate is provided with partition plate warm air ports corresponding to the two warm air ducts, and heating devices are arranged in the partition plate warm air ports; a second volute is arranged on the top surface of the box body partition plate on the outer side of the wind wheel mounting port, the front or the rear of the second volute is communicated with a ventilation air duct, and a ventilation port corresponding to the ventilation air duct is formed in the box body; a fan is arranged in the first volute, the output end of the fan is connected with a wind wheel, the lower portion of the wind wheel is arranged in the first volute, and the upper portion of the wind wheel penetrates through the wind wheel installation opening to be arranged in the second volute. The wind wheel blades positioned in the first volute and the wind wheel blades positioned in the second volute are arranged in opposite directions; the cover plate is provided with an air inlet corresponding to the wind wheel and a warm air outlet corresponding to the partition warm air port.