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LATEST PUBLICATIONS Effective ways to reduce the cost of heating... Installation of the shower cabin independently The comfort in the house is furniture Stylish design of a small bathroom Upholstery of metal doors.... Conditioner - problems or pleasure?.... Cooling commercial premises with the use of chillers..... Practical and durable materials for sanitary ware.... What etermines the comfort of the bathroom.... Children's sports corner.... Home pool.... Refrigeration agents.... Metal-plastic windows and the comfort.... Burners for electric cookers.... Energy saving and insulation materials. Mineral wool..... LED revolution.... Man and Real Estate.... Recuperators in ventilation.... Juicer is a climate equipment?.... | FansFans are devices designed to transport air, gas, or other aerosomes through or without air ducts, thus creating excessive pressure of different magnitudes. Diameter fans (diagonal fans)Diametric fans, or, as they are called, diagonal fans, have a drum-type impeller and an asymmetrical knee-shaped body. Diagonal fans have a design with asymmetrical impeller location , which provides air flow to the smaller section. Diameter fans with wide wheels can be connected directly to air ducts that have a cut in the form of an elongated rectangle and can create significant pressures even at low circumferential speeds of the working wheels but have a low efficiency. Axial fansAxial fans move the airflow along the axis of the impeller driven by the electric motor. By default axial, fans can be divided into home and industrial fans. Because of the low pressure that creates axial fans (up to 50 Pa) they are used mainly in non-channel ventilation systems or in systems with a small length of air ducts (up to 5m), for example, bathrooms, bathrooms, showers, offices, sinks, warehouses, etc. Centrifugal fans (radial fans)Centrifugal fans (radial) have such a design in which the movement of air occurs due to centrifugal forces that arise when rotation of the impeller. The transformation of the kinetic energy of air into a potential, that is, increasing the air pressure with a decrease in speed is provided by the part of the expanding body - a diffuser. The main characteristics of the fans are: Centrifugal fans with curved forward blades have high flow rates and air pressure, with increased feed increases and pressure, but low efficiency, engine overheating and high noise levels are possible. Centrifugal fans with rearward-shovel blades have high efficiency, low noise, and with increasing supply the power does not change, but the pressure decreases. Centrifugal fans with radial endings also have high efficiency and low noise, with increasing supply pressure does not change, but increases power consumption and noise. The above characteristics of the fans are presented graphically, in the form of an individual characteristic of the fan, most often in the form of a dependence of its performance on the pressure output and rotational speed impeller. It should be noted that now in most manufacturers of ventilation equipment in the range are fairly well-presented channel centrifugal fans for circular cross-section channels (diameter from 100 to 400mm) and air ducts of a rectangular cross section (from 300x150 to 1000x500mm). It expanded the scope of their application from domestic to larger industrial ventilation systems. Fans of mixed type (centrifugal axial fans)In recent years, fans of a mixed type, so-called centrifugal and axial fans have been widely used in channel household and semi-industrial vent systems with round air ducts. Thanks to their a special air structure under the influence of centrifugal force is directed along the engine's axis. These fans are compact enough and create a decent pressure, which allows them to be used in systems with air ducts much longer than for axial fans. At present there is a large number of both foreign and domestic manufacturers of ventilation equipment. Some manufacturers are known throughout the world for decades; others are only beginning to actively develop their production. Nevertheless, the market of ventilation equipment is actively developing, technologies and quality of products are being improved. Do not bypass this industry and trends in the introduction of new energy-saving technologies (recuperators, EC-fans etc.) |
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