Most of us turn to overhead ceiling fans or industrial stand fans to cool down while trying to relax. The trouble with most of these fans, though, is that they can be noisy. This can be remedied by getting silent fans for your home.
Most fans can generate quite a lot of noise, and that way, you can't watch TV or listen to music without cranking up the volume, or even sleep easily. This even happens to exhaust fans or computer fans. The noisier fan models not only are very annoying to use, they also allow less airflow than the silent ones.
Ceiling fans have been around for centuries, only that they were initially for those households who were well off. Today though, the electric, multi-bladed axial fan is very common in households around the world, most especially those in the warmer regions and seasons. Used mostly for gaseous displacement and cooling ventilation for machinery, these electric axial fans are used in nearly all sectors of industry. They first debuted in the personal computer to give cooling airflow in the power source and supply, and now these fans, both silent and not-so-silent, can be found on all hardware on computers.
Trying to cover the whole history of electric fans would probably take the whole World Wide Web, with a history that goes right back to the discovery of electricity. And at the rate that today's technology is going, the possibilities for the innovation of silent fans are endless.
Silent fans and their basic anatomy
At their simplest, silent fans are mostly a combination of an impeller, more popularly known and propeller, and an electric motor. The impeller contains three to four blades that extend from a central hub, which in turn is spun by the electric motor. The motor also has a shaft coming with a wire armature electromagnet, connecting to the central hub of the impeller. To allow the electric current to flow through the armature, a rotary switch or commutator turns back the direction of the current twice every cycle, and the electromagnets push and pull against immovable magnets on the housing of the motor. The commutator then counters the polarity of the armature electromagnet as the poles of the armature pass the poles of the permanent magnets. Inertia then helps maintain the motor's direction.
Two crucial parts of a DC axial fan are the bearings that keep the shaft from going out of place, and the structure of the blades that should interact with the air, ideally.
Some tips on selecting silent fans
Industrial or commercial grade silent fans come in a lot of forms for you to choose from, and they are great ways for you to cut down on energy costs while keeping cool, literally. Not just great in the hot summertimes, silent fans are also useful during winter, when you want to lower your heating bill. Many have been manufactured specifically for establishments like hospitals, warehouses, plants, offices, retail stores, gyms, schools, homes and even outdoors; basically anywhere that proper air circulation is needed. And the models can be found anywhere, from the floor to the ceiling to the walls.
A way to measure the efficiency of your fan is to measure and quantify the amount of air displacement by cubic feet per minute (CFM). The greater the CFM produced by your fan, the greater the amount of air you'll get from it, and therefore the greater cooling effect it will have in a room. A good fan will allow one to increase the thermostat by a few degrees because of the chilling effect a fan brings. Even on colder times, a fan is also useful in keeping warm as it helps move warm air down.
In selecting silent fans, there are a lot of standards you should keep in mind. One of the important things to remember is to measure the amount of noise a fan will create, measured in dB. The lower the derived dB, the more silent your fan is. Silence may not be very important in warehouses or loading docks, but keeping it down is especially essential in functional close quarters such as offices and retail stores.
The fan should also have an oscillating mechanism to allow it to rotate around the room. This mechanism allows silent fans from side to side, forcing air to be circulated better around the room. For very close quarters where you can't place a heavy stand fan like health clubs and restaurants, the ceiling fan or fans that can be mounted on walls and corners are very useful in keeping the place spacious. Heavy-duty industries, though like garages, auto repair shops, warehouses and large industrial places will be needing an industrial-grade floor or drum fan, which have CFM's greater than 2000 and are easy to move with wheels.
Where can I get the best silent fans?
You can buy many kinds of silent fans at hardware stores for the most part. Silent fans for PC's can be bought online, too. You can find industrial-grade silent fans at alibaba.com.
As an ending note, silent fans can significantly increase the comfort level in your home or office, and can also help you keep down on your cooling and heating costs. So if you're looking for comfort and practicality, count on silent fans.