Investigation of the Flow Performance of the Diverter Cover in the Dishwasher

Abstract

Competition remains fierce within the dishwasher industry, mirroring the ongoing rivalry in all household appliance sectors. The influence of fresh regulations and advancements in technology has spurred a multitude of research endeavors. In the context of household dishwashers, it is widely recognized that the primary focal points are centered on washing efficiency, drying capabilities, water consumption, and energy efficiency. The effectiveness of the hydraulic system within the machine plays a pivotal role in determining its washing prowess, water usage, and energy performance. This research focuses on the examination of the geometry of the diverter element's cover within the hydraulic system of a dishwasher. The diverter and its associated cover, crucial components of the hydraulic circuit, underwent a comprehensive analysis utilizing Computational Fluid Dynamics (CFD) software. Subsequent to the analysis, efforts were made to enhance their performance, encompassing both experimental and numerical approaches. As a result of optimizing the diverter cover's geometry, a notable reduction of 26 ml in water volume within the reservoir was achieved, along with a substantial improvement in pressure loss, amounting to 20 mbar. Subsequent tests conducted with the improved design showcased a remarkable increase in flow rate, measuring 8.1% at 2400 pump revolutions per minute and 8.9% at 2800 pump revolutions per minute.