About The Development History of Vacuum Cleaners

The electric vacuum cleaner has a history of 100 years. For many people, it has become an indispensable household device for obvious reasons. The current controls the operation of the motor. A fan is attached to the motor, and the fan blades have a certain angle, just like the propeller of an airplane. When the fan blades rotate, they push air all the way to the exhaust port.

When air particles are pushed forward, the particle density in front of the fan will increase, and the air pressure will increase accordingly, while the particle density behind the fan will decrease. The pressure drop behind the fan is the same as the pressure drop in the straw when you take a drink. The pressure behind the fan is lower than the pressure outside the vacuum cleaner, which is the ambient air pressure. This creates a suction force inside the vacuum cleaner, which is a partial vacuum. In 1901, it originated in England.

Several inventors in the 19th century experimented with a machine that could suck dirt. Most machines use a folding bellows that can be operated by hand. Some machines were built, including the successful "little daisy" type. But they do not save labor, because two people are required to operate, one exhaust box and one alignment interface.

British engineer Herbert Booth built the first effective vacuum cleaner in 1901. It has a gasoline engine and is the first vacuum cleaner with a high-efficiency filter, that is, it has a filter cloth that retains dirt and returns clean air to the room. It is a large and heavy device intended to be used in a factory.

The main components of modern vacuum cleaners are vacuum pumps, dust bags, hoses and nozzles of various shapes. There is an electric exhaust fan inside the machine. When it is powered on, it is told to run. It is an instant vacuum formed inside the vacuum cleaner. The internal air pressure is much lower than the outside air pressure. Under the action of this air pressure difference, dust and dirt enter the vacuum cleaner barrel with the airflow. After being filtered by the dust bag, the dust remains in the dust bag, and the purified air escapes into the room again through the motor, playing the role of cooling the motor and purifying the air.

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