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A vacuum cleaner needs useful airflow through its nozzle, hose and filter. Electrical input watts alone cannot describe suction performance. Review airflow and pressure together at the operating point created by the complete appliance.
Why maximum flow and maximum pressure do not belong together
A motor–fan assembly has a pressure-versus-flow characteristic. The appliance has its own resistance from the nozzle, bends, hose, filters and passages. The operating point depends on their interaction.
A free-flow result and a sealed-inlet pressure result represent different conditions. Multiplying these two maxima produces a misleading number. Ask for values measured at the same restriction, supply and test configuration.
What air watts describe
For a clearly defined airflow measurement boundary, pneumatic power can be expressed as P = Δp × Q, where pressure difference Δp is in pascals and flow Q is in cubic metres per second. Under this simplified calculation, 10,000 Pa at 0.020 m³/s corresponds to 200 W. This is a calculated illustration, not a Zhanye test result or a cleaning-performance guarantee.
Keep pneumatic power, shaft power and electrical input separate. Measurement location, air-density corrections and the selected test method matter when comparing published air-watt figures.
Build an application operating-point map
- Clean filter and the intended nozzle or attachment.
- Representative filter loading and dust-container condition.
- Each speed setting and permitted supply variation.
- Expected restrictions, with abnormal-operation tests defined by the product validation plan.
- Required airflow, pressure, electrical input, temperature and noise at each relevant condition.
Do not assume that restriction always raises current or always lowers temperature. The response depends on fan design and the cooling arrangement. A lower electrical input can coexist with insufficient cooling.
Cooling and air-path requirements
Identify whether working air and motor-cooling air share a path or have separate paths. Confirm the construction’s permitted air conditions, filter arrangement and contamination controls. Wet pickup suitability must be established for the actual assembly and appliance; it cannot be inferred from a motor family name.
Compare candidates in the same appliance
Use the same nozzle, hose, filter, sealing condition and measurement locations. Record supply, speed setting, ambient conditions and stabilization procedure. Test repeatability before interpreting a small difference as a design improvement.
Prepare a focused OEM inquiry
Share the airflow and pressure target together, appliance air-path drawing, supply, available dimensions, duty cycle and cooling concept. Add the required test method and market requirements when known. Engineering can then review the universal motor or brushless motor family with the intended fan system.
Related: thermal validation and noise and vibration.
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Helpful information to include: target voltage, speed, torque, duty cycle, available dimensions, project stage and estimated annual demand.