It's no secret that a person is difficult to stop in his quest for comfort. And the purity of air in it plays an important role in creating comfortable conditions in the home. Unfortunately, the internal ventilation in most of our homes is arranged in a way that does not provide the proper level of air exchange. And even buying air purifiers does not always help. The situation will be helped by the purchase of a special device that helps the air masses move and update much more quickly - the fan . About the features of installation and operation of radial domestic fans, we'll talk today.
What is the difference between a radial fan and an axial fan?
How is the radial fan arranged and what is its difference from the axial fan? As is known, in an axial fan the air is moved by the blades (blades) around the axis to which these blades are attached. That is, the movement of both air and fan blades occurs in the same plane, and in the same direction. Unlike axial fans in radial fans, the direction of air movement at the inlet and outlet of the fan does not match - the outgoing air flow is located at right angles to the incoming air.
The main working element of the radial fan is its impeller, which looks like a cylinder, on the outside covered with blades. Blades of the radial fan can be bent forward or backward. The fan with backward curved blades is more productive and uses 25% less energy, but it has a number of drawbacks that make its use for household purposes undesirable: it makes more noise during operation and has larger overall dimensions.
Installation of radial domestic fans for extraction
Due to their design, radial fans, called centrifugal fans, are able to create a higher pressure and move air masses to a much greater distance than the axial ones. That is why radial fans are more often used in industrial premises. In household rooms, radial fans are used only as channel fans and are mounted inside ducts. In this case, in the place where the radial fan is mounted, the air duct must change its direction at a right angle. To reduce vibration and noise levels, radial fans must be equipped with a flexible shock absorber during installation.
In order for the radial fan to last for many years without breakdowns, the following conditions must be met in the room where it is operated:
- the air temperature should not be above 60 degrees;
- The level of mechanical impurities in the air should not exceed 1 gram per 1 cubic meter;
- There should be no sticky substances and fibrous particles in the air.
Classification of radial fans
Depending on the characteristics, distinguish such varieties of radial (centrifugal) fans:
- In the direction of movement of air masses:
- bilateral;
- exhaust.
- low pressure (up to 1000 Pa);
- medium pressure (1000-3000 Pa);
- high pressure (3000-12000 Pa).
- left (counter-clockwise) rotation;
- right (clockwise) rotation.
Most often in systems of household ventilation and air conditioning, and
Characteristics of radial fans
When choosing a specific model of a radial domestic fan take into account the following characteristics:
- power of electric drive;
- Performance - the amount of air that a fan is able to pass through itself in a unit of time;
- air pressure at the fan outlet;
- differential pressure at the inlet and outlet of the fan;
- pressure characteristic - a graph showing the pressure dependence on the performance of the fan.