The small hole or vent on the front of vacuum cleaners is typically called a "suction control" or "suction release" vent. Its purpose is to allow the user to adjust the level of suction power generated by the vacuum cleaner. Here's how it works:
Suction control: By adjusting the suction control vent, you can control the amount of air that enters the vacuum cleaner's motor. When the vent is fully open, the vacuum cleaner generates maximum suction power, which is useful for cleaning heavily soiled carpets or picking up large debris. When the vent is partially closed, the suction power decreases, making it easier to clean delicate surfaces or vacuum lightweight materials without causing damage.
Preventing damage to delicate surfaces: Some surfaces, such as curtains, drapes, or lightweight rugs, can be damaged by excessive suction power. By adjusting the suction control, you can reduce the risk of causing damage while still effectively cleaning the surface.
Energy efficiency: Reducing the suction power when cleaning surfaces that don't require maximum suction helps conserve energy and extend the life of the vacuum cleaner's motor and components.
It's essential to consult the user manual of your specific vacuum cleaner model to understand how the suction control vent works and the recommended settings for different cleaning tasks. Properly adjusting the suction power ensures efficient cleaning and helps protect both the vacuum cleaner and the surfaces you are cleaning.