The centrifugal fan is a mechanical energy that relies on the input of mechanical energy to increase the gas pressure and to deliver the gas side by side. Centrifugal fans are widely used in the ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings. Ventilation and ventilation of boilers and industrial furnaces; Cooling and ventilation in air conditioning equipment and household electrical appliances; Drying and selection of grain; Wind tunnel air source and air cushion vehicle gas and propulsion, etc.
The essence of centrifugal fan is a variable flow constant pressure device. When the speed is certain, the pressure - flow theory curve of the centrifugal fan should be a straight line. Due to internal losses, the actual characteristic curve is curved. The pressure generated in the centrifugal fan is greatly influenced by the change of inlet temperature or density. For a given amount of air intake, the maximum air inlet temperature (the lowest air density) produces the lowest pressure. For a given pressure and flow characteristic curve, there is a power and flow characteristic curve. When the blower is running at constant speed, the power required for a given flow increases with the decrease of the inlet temperature.
The centrifugal fan turns to the schematic diagram
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