Complex ventilation and air conditioning systemsare designed taking into account many factors. Subsequent installation requires special attention: air ducts, air heaters, sound attenuators, diffusers, grills and valves must be in place, and fans and air conditioners must have adequate power.
A fan, centrifugal or axial, generallycall the heart of the system, because it is he who pushes the air through the vessels of the system - the air ducts in the right direction. Despite the fact that such units are necessary for performing the same function - forced air movement, each of them has a special design.
Centrifugal fan. The device, the principle of operation and distinctive features
Such features of the operation of this unit of steelThe reason for its name is the centrifugal fan, which is also radial. Another "nickname" - snail - this equipment has received thanks to its spiral-shaped body.
Rotating the impeller in such a fancan be right or left. The number of blades affects the type and purpose of the equipment. There is another nuance: in which direction are the blades turned (forward or backward) - this in some cases is of fundamental importance. For example, a centrifugal fan equipped with vanes curved back allows saving up to 20% of electric power, and during its operation, overloads on air consumption are permissible.
The blades, bent forward, in turn,can reduce the diameter of the wheel to which they are attached, and accordingly, the fan itself can be more compact. Another plus: the speed is less, and the noise level is reduced.