The core basis for testing the DPU (Dust Pickup Efficiency) of household vacuum cleaners is the national standard GB/T 38048.2-2021, which is equivalent to IEC 62885-2:2016, aiming to quantify dust removal efficiency. The following are the specific testing requirements and key equipment:

Core testing items and requirements

- Carpet DPU

- Environment: 23±2°C, 50±5%RH.

- Bae material: Wilton carpet (standard), with a usage cycle of ≤600 times.

- Dust: Type 2 standard dust, with a dispersion amount in accordance with the standard ratio.

- Operation: Cleaning speed of 0.50±0.02 m/s, with at least 3 cleaning cycles.

Calculation: (Initial dust amount - Residual amount) / Initial dust amount × 100%.

- Hard floor DPU

- Substrate: Hard flooring (such as PVC, wood).

- Dust: Type 1 mineral dust.

- Calculation: The evaluation of residual dust mass ratio differs from the carpet DPU measurement.

- Gap dust removal

- Substrate: Aluminum strip test panel (simulated gap).

- Indicator: Gap dust removal rate.

Essential testing equipment

- Dust dispersion device: With an accuracy of ±0.01g, it ensures uniform and reproducible dust distribution.

- High-precision balance: resolution ≥ 0.001g, capable of measuring weight differences.

- Mechanical operating device: Controls the speed and path of the cleaning head, simulating handheld operation.

- Airflow vacuum tester: measure flow rate (L/s) and vacuum degree (kPa/aw), and plot performance curves.

- Reference Suction System (RSB): used for calibration to ensure comparable results, with a calibration cycle of ≤2000 times or 3 years.

- Environmental control cabin: Stabilize temperature and humidity, eliminate interference.

Key precautions

- Pre-treatment: The new vacuum cleaner requires a 2-hour break-in period; the carpet needs to be fully pre-treated until it stabilizes.

- Operating specifications: Ensure full coverage of the cleaning path and strictly adhere to the speed standards; discharge static electricity before weighing.

- Result determination: The deviation for three tests is ≤3%; the DPU value is expressed as a percentage, with a higher value indicating better performance.

reference standard

- GB/T 38048.2-2021/IEC 62885-2:2016 (Core Performance)

- IEC 62885-1:2016 (General Terms for Test Methods)

- GB/T 38048.1-2020 (General Requirements for Test Materials and Equipment)