Do rechargeable vacuum cleaners cause secondary pollution?

If rechargeable vacuum cleaners are not used or maintained properly, there is indeed a risk of secondary pollution. The following is the analysis of key points:

1. Dust spraying at exhaust outlet (direct pollution source)
Insufficient filter efficiency: Low end models have large filter gaps, and the inhaled dust (such as pollen and mite corpses) is not completely intercepted, and is directly sprayed back into the air through the exhaust port.
HEPA filter aging: When the high-efficiency filter is damaged or not replaced for a long time, it loses its ability to block PM2.5 level particles, causing the phenomenon of "suction while spraying".

2. Dust collection box operation pollution (indirect diffusion)
Dust generated by opening the lid: When dumping the dust box, the accumulated dust inside is instantly dispersed by the airflow disturbance (especially near carpets and sofas where it is more likely to remain).
Wet garbage residue: Inhaling damp dirt (such as spilled coffee powder) adheres to the inner wall of the dustbin, breeds mold, and during subsequent cleaning, spores are released with the airflow.

3. Rolling brush and attachment carry pollution (concealed transmission)
Hair/fiber entanglement: The accumulated pet hair and cotton wool on the rolling brush continue to shake during operation, shaking off the allergens attached to it to the ground.
Dust particles trapped in narrow suction ports can cause cross contamination during the next cleaning of different areas, such as moving from the kitchen to the bedroom.

4. Internal channel mold (biological contamination)
Accumulation of dirt in humid environments: The water washed filter screen is not completely dried before installation, or water containing garbage is sucked in, resulting in the growth of black mold on the inner wall of the air duct, emitting odors and harmful microorganisms during operation.
Long term failure to clean the dead zone: The connecting pipeline between the dust collection box and the motor accumulates dust and dirt, forming a "polluted warehouse". When the strong suction airflow passes through, it repeatedly stirs and overflows.

User Anti Pollution Practical Guide
Exhaust port test: After turning on, use the back of your hand to approach the exhaust port. If there are obvious particles splashing, it is recommended to upgrade the filter.
Wet wipe+vacuum combination: First, use an electrostatic mop to absorb floating dust, and then use a vacuum cleaner for deep cleaning to reduce dust.
Outdoor cleaning principle: The dumping of dust boxes and tapping of filters must be carried out above balconies/trash cans, avoiding indoor ventilation areas.
Deep maintenance rhythm: remove the roller brush and clean the entanglement every month; Use medical alcohol swabs to wipe the inner wall interface of the vacuum cleaner every season.