Integrated Cooker Hood Losing Suction with Grease Clogging the Duct? NL-IRH-6 Hood Airflow and Grease Separation Test Bench, Duct-Type Sweep (pump test bench)

Integrated cooker hoods that lose suction within a year, spill frying smoke into the kitchen and leave the shared duct clogged with grease usually turn out to have oil-coated impellers, greased-up ducts and a non-return flap stuck shut. Claimed airflow is rarely verified and grease separation goes unmeasured, so hood makers, motor suppliers and duct suppliers argue without a single number. An incoming check that stops at a noise test sees neither the decay nor the grease build-up until a whole batch reaches the service desk.

What the NL-IRH-6 hood airflow and grease separation test bench measures

• Duct-type airflow-pressure curves swept automatically across operating points, with the motor operating point plotted, quantifying suction decay from oil-coated impellers (sharing the flow and power metering module of our pump test bench)
• Grease separation testing: the exhaust aerosol is sampled, separated and weighed per the standard method, with the separation percentage calculated to support rated claims
• Motor power, efficiency and temperature rise captured together, reproducing overheating and speed droop under greasy loads
• Oil-mist cycling endurance over hundreds of hours at heavy-cooking rhythms, with airflow decay and grease build-up re-measured every round
• Non-return flap opening, closing and sealing checks, reproducing the smoke backflow a stuck flap causes
• Noise and vibration capture, with barcode and batch binding and raw data exported per unit

Applicable standards

GB 4706.1 (household appliances – general safety), GB 4706.28 (range hoods – particular requirements), GB/T 17713 (range hoods – test methods for airflow, static pressure and grease separation) and GB/T 2828 sampling; criteria can follow the customer’s standard and the rated airflow and separation values.

Stations and throughput

One duct-type test section completes airflow, pressure, separation and noise sweeps in a single set-up, running 24/7, turning the days an operator would spend waving an anemometer at the outlet and weighing stripped parts into one automated sweep, with airflow decay and separation rechecked round by round — so incoming motors and end-of-line hoods can both be sampled batch by batch, stopping weak suction and clogged ducts before shipment.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of cooker hood airflow and grease separation 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.