Exhaust fan, driven by the motor driven by the wind vane rotating airflow, so that indoor and outdoor air exchange of a class of air-conditioning appliances. Also known as Fan fan. The purpose of the exhaust is to remove the indoor dirty air, adjust temperature, humidity and sensory effects. Exhaust fan is widely used in home and public places.
The exhaust fan is divided into partition type (the two sides of the partition hole are free space, from one side of the partition to the other side), catheter exhaust type (one side from the free space into the air, while the other side through the catheter exhaust), the catheter intake type (one side through the catheter into the air, while the other side to the free space exhaust), the entire catheter-type (exhaust fan on both sides of the catheter, through the catheter intake and exhaust According to the form of air flow into the centrifugal type (the atmosphere is parallel to the axis of rotation into the direction, discharge perpendicular to the axis, the axial flow (air is entered in the direction parallel to the axis of rotation, still parallel to the direction of the axis) and the Cross-flow type (the air enters and discharges are perpendicular to the axis direction).
Exhaust fan Ventilation mode has a discharge type, inhalation type, and three kinds of type. The discharge enters the air from the natural air inlet, discharges the foul air through the exhaust fan, inhales the fresh air through the ventilator, discharges the foul air from the natural exhaust outlet, and uses the suction and the exhaust gas to complete by the ventilator.
The exhaust fan belongs to an axial flow fan. It is mainly used in negative pressure ventilation and cooling engineering, which is called exhaust fan. The exhaust fan has the characteristics of Super Gale Channel, Super Gale Leaf diameter, super large exhaust air, ultra-low energy consumption, low speed and low noise.
With the cooling of the use of the curtain can solve the problem of ventilation and cooling. The exhaust fan will form a negative pressure environment in the room during the operation. If the exhaust fan out of the other side of the wall installation of cooling water curtain, exhaust fan in the indoor stuffy air out of the outdoor, but also through the cooling water curtain into the room containing rich water vapor in the low-temperature air inhalation indoors, so as to achieve ventilation, cooling effect.
Exhaust fan out of the air in the process will cause indoor pressure drop, indoor air thinning, forming a negative pressure zone, air due to the pressure differential compensation into the room. In the practical application of industrial plant, the exhaust fan is usually installed on one side of the plant, and the air inlet is on the other side of the factory room, and the airflow is formed by convection from the inlet to the exhaust fan. In this process, the doors and windows near the exhaust fan remain closed, forcing the air to be compensated by the inlet and window. Air platoon, orderly flow from the inlet to the workshop, flow from the workshop, from the exhaust fan out of the workshop. Ventilation is complete, efficient, ventilation rate can be as high as 99%. Through specific engineering design, according to the need for ventilation speed and wind speed, any high fever, harmful gases, dust smoke can be quickly discharged from the workshop, any ventilation problems can be a one-off solution. The ventilation effect can be achieved in a few seconds from the opening of the blower.