The exhaust fan is divided into the partition type by the inlet and outlet (the two sides of the partition hole are free space, from the side of the wall to the other side of the air, duct exhaust type (one side from the free space into the gas, and the other side through the catheter exhaust), the catheter intake type (one side through the catheter into the air, and the other side to free space exhaust), Full-catheter type (both sides of the exhaust fan are placed on 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.
Exhaust fan can be indoor hot air quickly discharged, the outside of the other side of the air inhalation indoors, to reach the temperature and the external temperature is flat, not in the workshop temperature rise. The flow of air will take away the body's heat, air flow to accelerate the evaporation of sweat and absorption of human body heat, so that the body feel cool, to the same cool as natural wind.