No, vacuum cleaners are not based on Bernoulli's Principle. Bernoulli's Principle is a fundamental concept in fluid dynamics that states that as the speed of a fluid (gas or liquid) increases, its pressure decreases, and vice versa. This principle explains how airplanes generate lift and how some fluid-based systems, like carburetors and atomizers, work.
Vacuum cleaners, on the other hand, operate using the principle of suction. Suction is created by a motor that drives a fan or impeller, which creates a low-pressure area inside the vacuum cleaner. The low-pressure region inside the vacuum cleaner causes air (and dirt particles) from the surrounding area to be drawn into the vacuum cleaner through the intake nozzle or hose. Once inside, the air and dirt pass through filters to separate the dirt from the air, and the dirt is collected in a dustbin or a bag.
The suction mechanism in a vacuum cleaner is quite different from Bernoulli's Principle, as it relies on creating a pressure difference between the inside and outside of the vacuum cleaner to draw air and dirt particles into the device. This process is driven by the fan or impeller, and the low-pressure area created inside the vacuum cleaner is what allows it to pick up dirt and debris from various surfaces.