Ventilator
The fan is a machine that depends on the input mechanical energy, increases the gas pressure and sends gas side by side, and it is a driven fluid machinery. Exhaust pressure is less than 1.5×10 pa. Ventilators are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling, boiler and industrial furnace ventilation and ventilation, air conditioning equipment and household appliances in the cooling and ventilation, drying and selection of grain, wind tunnel wind source and hovercraft aeration and propulsion.
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The ratio of effective fan power to shaft power is called efficiency. The full pressure efficiency of the fan can reach 90%. Flow, wind pressure, power and efficiency and other parameters have a certain functional relationship, when one of the parameters changes, the other quantities also change. The relationship between them is plotted as a curve, called a performance curve. The shape of the performance curve depends on the type of fan. Changing the air volume and pressure of the fan to meet the requirements of changing operating conditions is called performance regulation.
Ventilators are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling, boiler and industrial furnace ventilation and ventilation, air conditioning equipment and household appliances in the cooling and ventilation, drying and selection of grain, wind tunnel wind source and hovercraft aeration and propulsion.
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