Low noise mixed flow fan case

A fan is a mechanical device that relies on input mechanical energy to increase gas pressure and discharge gas. It is a passive fluid mechanical device. Fan is the customary abbreviation for gas compression and gas transportation machinery in China. Generally, fans include ventilation fans, blowers, and wind turbines.

Fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings, as well as for ventilation and induced draft in boilers and industrial furnaces; Cooling and ventilation in air conditioning equipment and household appliances; Drying and selection of grains, inflation and propulsion of wind tunnel sources and hovercraft.

The performance parameters of a fan mainly include flow rate, pressure, power, efficiency, and speed.

In addition, the magnitude of noise and vibration are also major design indicators for fans. Flow rate, also known as air volume, is expressed as the volume of gas flowing through a fan per unit time; Pressure, also known as wind pressure, refers to the increase in pressure of gas inside a fan, which can be divided into static pressure, dynamic pressure, and total pressure; Power refers to the input power of the fan, that is, the shaft power. The ratio of the effective power of a fan to the shaft power is called efficiency. The total pressure efficiency of the fan can reach 90%.