Generally, the operating principle for all common vacuum cleaners are the same. The device consists of the device body. This is an engine (usually a series wound motor or universal motor, sometimes a shaded pole motor) located on the blower to generate the negative pressure. The fan consists of a one-or two-stage centrifugal compressor.
By the fan air flow generated sucks the dust and dirt via the suction pipe into the housing interior. There will be cleaned of dirt-enriched air. We can distinguish three different vacuum cleaners today at the basic types:
Vacuum cleaner bag
Bagless vacuum cleaner with a single cyclone and filter central
Bagless vacuum cleaner to the multi-cyclone principle.
The air stream is passed directly into the air-permeable bag. The bag has not only provide a collection function, but must at this point the main filter work. It is actually a contradiction to do a good job filtering and allow unimpeded air as possible, so that the engine cooling is absolutely necessary permits. Special nonwoven filter bags are now able to achieve, even HEPA-power values.