关键词: 分区洗涤功能, 分区洗净效果, 分区二次污染控制, 分区干燥效果, 资源节约

Abstract: With the increasing demand for refined washing by consumers, zone washing has become a core functional selling point in the dishwasher market. Most brands claim that this feature can achieve multiple values such as efficient cleaning, energy saving, and water conservation simultaneously. However, it is claimed that there is still a lack of evaluation data to support the claimed effect and actual performance. The industry lacks systematic verification of the actual performance of this function currently. Selected three sample dishwashers with zone washing functions from mainstream brands in the market and conducted tests from six dimensions: cleaning effect, control of secondary pollution risk, drying performance, energy saving, and water saving. The results showed that there was a significant differentiation in the zone washing performance of different brands: the cleaning and drying performance of the upper zone on all sample machines was better than that of the lower zone. Among them, the washing effect of one sample machine's zone washing did not meet expectations overall. The cleaning index of this dishwasher was less than 3.5 and the drying effect was poor. In terms of energy saving, the energy consumption in the zone mode was reduced by 7%~23% compared to rated capacity, while the water saving performance varied greatly. The water consumption of two sample machines was reduced by 7%~17% compared to rated capacity, but the water consumption of one sample machine during zone washing was basically the same as that during rated capacity washing. The time was significantly reduced by 7%~21%. It was closely related to the design of the programs and structures of each brand's sample machine. The study revealed the actual performance differences of the zone washing function in dishwashers at present, clarified the improvement directions in structural design and program optimization of this function, and provided empirical evidence for the industry technological upgrading and consumer purchasing.

Key words: Zone washing function, Zone cleaning effect, Zone control of secondary pollution, Zone drying effect, Resource conservation