Rice Grains Back on Clean Dishes? NL-DFL-4 Dishwasher Filter Basket and Micro-Filter Retention Self-Clean Bench (dishwasher test equipment)

The filter basket is the dishwasher part the user touches most, yet the line usually checks one thing: is it fitted, is the mesh intact. The real differences live in use. A coarse mesh lets grains and bone fragments pass back, and the spray arm throws them onto the load — the customer reports “soil on clean dishes”. A fine mesh holds the soil but pastes the pump inlet — the customer reports “the machine will not drain”. Whether the self-clean backwash actually carries the trapped soil away, how fast the pressure drop climbs over cycles, whether bone impacts dent the mesh — none of the three has a number, so mesh selection is trial-and-error on a sample machine.

What the NL-DFL-4 retention bench measures

• Four stations with a metered standard soil load (rice, bone, noodles, leaf fragments in proportion), reproducing a real post-meal soil spectrum (the wash-circuit branch of our dishwasher test equipment range)
• Retention grading: soil recovered layer by layer after the run and weighed by size class, retention and pass-through rates per mesh option
• Return-soil check: soil recovered from the basket surface after the drain phase, quantifying the “soil back on clean dishes” complaint
• Self-clean efficiency: spray-arm backwash and drain-reverse cycles combined, soil cleared and residue trend per cycle
• Pressure-drop curve: inlet-outlet differential sampled online through the run, clogging rate and the knee of the curve plotted against cycles
• Drain-pump stall review: pump current and stall-protection triggers counted under soil load, mesh-to-suction matching judged directly
• Mesh deformation and fitting endurance: bone impact plus refit cycles, mesh bulge, clip loosening and seal displacement checked item by item
• Detergent medium and 65 to 75 °C water, coating and plastics of the mesh verified under real duty
• Barcode binding, retention, return-soil and pressure curves exported per unit for mesh and basket lot comparison

Applicable standards

GB/T 20290 (methods for measuring the performance of household electric dishwashers) and the washing-performance basis of IEC 60436, with structure and safety following GB 4706.1, GB 4706.25 and IEC 60335-2-5; soil recipes, retention and return criteria can follow the customer standard, sampling to GB/T 2828.

Stations and throughput

Four stations on metered, continuous cycling complete a full retention and backwash record for one mesh option in a morning, replacing “try it on the sample machine” with comparative reports of retention rates, return-soil mass and pressure curves. Incoming baskets, wash-circuit matching and after-sales stall complaints share one bench.

Manufacturer

Guangdong Endurance Electronic Equipment Co., Ltd. — a non-standard testing equipment manufacturer of dishwasher filter retention benches, dishwasher test equipment, washing machine test equipment, pump test bench and pump performance test systems and level sensor life test machines.

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