Cooling fan (negative pressure fan)
1、 Ventilation principle
The negative pressure fan exhausts the air to reduce the indoor air pressure, and the indoor air becomes thin, forming a negative pressure area. The air flows into the room because of the air pressure difference compensation. In the practical application of industrial plant, the negative pressure fan is assembled on one side of the plant, the air inlet is on the other side of the plant, and the air is convective from the air inlet to the negative pressure fan. In this process, the doors and windows close to the negative pressure fan shall be closed to force the air to flow into the workshop through the doors and windows on one side of the air inlet. The air flows into the workshop from the air inlet in a row and in sequence, and then flows through the workshop and is discharged from the workshop by the negative pressure fan. The air exchange rate can be as high as 99%. Through detailed engineering planning and air change speed and wind speed planning according to the demand, any high heat, harmful gas, dust and smoke can be discharged from the workshop quickly, and any problem of poor ventilation can be solved completely at one time. The ventilation effect can be achieved within a few seconds of opening the fan.
