What is a vacuum cleaner?

1. Core Working Principle: Creating an Airflow Difference
A simple analogy: It mimics the human "sucking noodles" motion, but with a motor generating a strong airflow.
Key Operations: ▶ Inhalation - The motor rotates, creating a low-pressure area. Air, carrying dust, rushes into the suction nozzle; ▶ Separation - The dust-air mixture swirls within the dust bin, causing heavy particles to fall into the dust collection box; ▶ Filtration - Fine dust is trapped by the filter, and clean air is discharged from the rear.

2. Functions of Core Components
Nozzle: Opening close to the ground (wide opening for floors, flat head for gaps);
Motor: The "heart" of the machine; higher speeds increase suction (commonly copper motors > aluminum motors);
Filter: The "cage" for dust (sponge filters large particles, HEPA filters trap pollen/mites);
Dust collection bins: Available in "bag-type" (contact-free) and "bagless" (washable and reusable).

3. Comparison of Mainstream Household Models

Type	Best For	Strengths	Limitations	Maintenance Quirks
Corded Canister	Large homes (>150m²)	► Uninterrupted power	Bulky; struggles on stairs	Bag replacements cost $
	Deep carpet cleaning	► Superior dust separation	Hose drags behind	Clogs if vacuuming ash
	Renovation cleanup	► Large debris capacity
Cordless Stick	Pet owners	► Instant hair pickup	Short runtime on max power	Battery degrades in 2-3 years
	Quick daily cleans	► Converts to handheld for sofas/cars	Small dustbin fills fast	Brushroll tangles daily
	Apartments	► Vertical storage saves space
Robot Vacuum	Busy professionals	► Automated scheduling	Gets stuck on dark rugs	Requires frequent bin emptying
	Hardwood/tile homes	► Cleans under furniture	Can't do stairs	Hair wraps around wheels
	Maintenance between deep cleans	► Newer models self-empty
Steam Mop Combo	Families with infants	► Sanitizes floors with heat	Heavy when water tank full	Mineral buildup in steam chamber
	Sticky kitchen messes	► Removes dried spills	Corded-only operation	Pads require hand-washing
	Allergy sufferers	► No chemical cleaners needed
Upright (Bagged)	Allergy sufferers	► Sealed HEPA system	Difficult to clean under furniture	Bags cost more than bagless
	Wall-to-wall carpet homes	► Direct-drive brush deep cleans	Heavy to push	Belt snaps if jammed

4. Not a universal tool - Uses to avoid
Risk of water absorption: Unless marked "wet/dry," standard models will burn out the motor when absorbing liquids;
Sharp objects: Glass shards and thumbtacks can cut the filter or jam the brush head;
Flammable objects: Flour and gasoline volatiles can ignite when exposed to sparks from the motor;
Small and valuable items: Earrings and USB flash drives are difficult to retrieve and can damage internal components.

5. Evolutionary Essence: Replacing the Shortcomings of Cleaning Tools
VS Broom: Solve the dust problem caused by hair, but not as quiet as a broom;
VS Mop: Dry vacuuming is faster, but cannot remove stubborn stains;
VS Rag: Effective at cleaning crevices and cracks, but cannot disinfect with wet mopping.