Range Hood Losing Suction and Getting Noisier With No Way to Prove Where It Decayed? NL-RHF-6 Range Hood Motor Air-Flow & Pressure Performance Endurance Bench Runs Six Stations (washing machine test equipment)

Range hoods losing suction and getting noisier over time leave servicers and quality teams unable to say whether it is motor power decay, an imbalanced grease-laden impeller, or rising duct resistance. There is no data to lean on, so parts get swapped by experience alone. Airflow-pressure performance and its endurance decay cannot be seen from the power-up and appearance checks typical of incoming inspection — the problem usually surfaces only after years of use.

What the NL-RHF-6 range hood motor airflow and pressure performance endurance bench measures

• Six stations in parallel, sweeping the airflow-pressure (H-Q) performance curve point by point, with automatic NG judgement when the operating point drifts from the factory curve (sharing the airflow/pressure metering and data-acquisition module of our washing machine test equipment)
• Motor power, speed and winding temperature rise logged throughout, with overheating and efficiency-decay trends output automatically
• Endurance cycling: continuous running on a set start-stop / duty rhythm, with performance decay filed against cycle count
• Effect of impeller imbalance and (simulated) grease loading on airflow and noise assessed
• Noise testing (sound pressure level) to reproduce the rise the end user actually hears
• Barcode and batch binding, with raw data exported per unit for the record

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.28 (range hoods – safety), GB/T 17713 (range hoods – performance) and IEC 60335-2-31 (range hoods – safety); acceptance criteria can follow the customer's standard.

Stations and throughput

Six stations running 24/7 bring hours of manual duct hook-up and airflow-pressure measurement down to about ten minutes per unit, while endurance cycling is completed within weeks — so incoming lots and end-of-line machines can be sampled batch by batch, stopping suction loss and noise problems before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of range hood motor airflow and pressure performance endurance benches, pump test bench and pump performance test systems, level sensor life test machines, dishwasher test equipment and washing machine test equipment.

Keywords: pump test bench, pump performance test, level sensor life test, dishwasher test equipment, washing machine test equipment.