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The Mechanism Behind Vacuum Cleaners - How Do They Really Work?

By Edited Nov 13, 2013 0 0

Although it might seem as an elaborate equipment, the standard vacuum is really composed of 6 important elements: intake slot, exhaust slot, motor unit, fan, permeable bag, and a case that keeps all the other elements.

When you attach the vacuum to the socket and switch it on, the following would take place:

1. First, the electric current would run the motor unit, that is connected to the fan, that looks like an aircraft propeller.
2. When the blades start to run, they'll push the air up, towards the exhaust slot.
3. When the air debris are forced forwards, the density of the debris would increase in front of the fan and thus decrease behind it.

The pressure decline that happens at the rear of the fan resembles the pressure decline when you take a juice through a straw. The pressure level in the region that's behind the fan would fall below the pressure level that's outside the vacuum.

This would likely generate a suction power within the vacuum. The surrounding air will force itself into the vacuum through the intake slot since the air pressure that's inside the vacuum is much less than the pressure on the outside.

Removing The Dust

The flow of air that the vacuum cleaner creates is like a flow of water. The air flow that move would push free dirt and dust. As the dust proceeds to the exhaust slot, it's going to move through the vacuum bag. Those very small openings in the vacuum bag are big enough to allow the air to pass through them, even though it's too small for the dirt debris to fit through. Thus, when the air flow enters the bag, the dust and dirt would be accumulated there. You could cling the bag anywhere over the path between the intake pipe and the exhaust slot, provided that the air flow passes through.

Suction

The effectiveness of a vacuum cleaner suction would rely on many factors. The suction could be powerful or less strong based on:

1. Fan power - To be able to produce a strong suction, the motor unit will need to run at a good speed.
2. Air passage way - When lots of particles accumulate in the bag, the air would encounter a higher amount of resistance along the route. Every single particle would move slowly as a result of increase in drag. This is why a vacuum cleaner functions far better once you change the bag than when you uses it for some time.
3. Size of the intake slot - If the speed of the vacuum cleaner fan is steady, the amount of air flow that moves through the vacuum per second will be steady as well.


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