Dishwasher Rack Spray Assembly for Intensified Heavy-Soil Washing
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Solution Overview
Problem
Conventional dishwashers often struggle to effectively remove heavy or baked-on food soils due to insufficient jet intensity and coverage, leading to inefficient energy consumption and limited loading capacity, as they are designed to handle all types of dishware with a single spray arm configuration.
Innovation Solution
A fluid circulation arrangement in a dishwasher that includes a spray device with adjustable nozzle members and a movable arm to provide concentrated and intensified wash effects on specific areas, allowing for customizable wash cycles and reduced energy consumption by targeting soiled areas directly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional spray arms are used to distribute dishwashing fluid broadly, then coverage area is improved, but jet intensity is insufficient to remove heavy or baked-on food soils
Solution Approach 1:
The spray system is segmented into multiple independent spray devices with separate nozzles, each capable of directing fluid at specific zones. This allows the system to maintain broad coverage through multiple devices while concentrating jet intensity at targeted locations where heavy soils are present, resolving the contradiction between coverage area and jet intensity.
Solution Approach 2:
Different spray devices and nozzles are configured with varying spray patterns, angles, and intensities tailored to specific zones within the tub. High-intensity spray devices are positioned and oriented to target areas prone to heavy soil accumulation, while maintaining overall broad coverage through the distributed arrangement of multiple spray devices.
2Reliability
If spray parameters are increased to remove heavy soils, then cleaning effectiveness is improved, but energy consumption increases disproportionately
Solution Approach 1:
High energy-consuming intense spray parameters are applied only locally to specific zones where heavy or baked-on soils are present, rather than uniformly across the entire tub. This selective application maintains cleaning effectiveness for difficult soils while minimizing energy consumption in areas where light to moderate soils are present.
Solution Approach 2:
The system applies intense spray action partially only where needed for heavy soil removal, rather than excessive action throughout the entire wash cycle. Multiple spray devices can be selectively activated or oriented to provide concentrated cleaning power only in zones requiring it, reducing overall energy consumption while maintaining reliability for difficult soils.
3Area of stationary object
If dishware is placed in horizontal orientation to maximize spray exposure, then cleaning coverage is improved, but loading capacity is severely limited
Solution Approach 1:
The spray system is divided into multiple independent spray devices positioned at different locations and orientations within the tub. This segmentation allows dishware to be placed in vertical or space-efficient orientations while still receiving adequate spray exposure from multiple angles, thereby increasing loading capacity without sacrificing cleaning coverage.
Solution Approach 2:
Instead of relying solely on horizontal spray exposure from a single direction, the system introduces spray coverage from multiple dimensions and angles through strategically positioned nozzles. This enables dishware to be loaded in vertical orientations or stacked configurations, maximizing loading capacity while maintaining effective spray exposure through multi-directional coverage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables effective removal of heavy soils with reduced energy and noise levels by focusing cleaning power on specific areas, optimizing dishwashing fluid distribution and usage.
Implementation Method 1
The spray device is adapted to receive the dishwashing fluid from the laterally-extending dishwashing fluid supply conduit and to dispense the dishwashing fluid therefrom through at least one nozzle member, so as to provide at least one of a concentrated wash effect and an intensified wash effect at a selected disposition within the tub portion
Data Source
AI summary
According to embodiments of the present invention, a dishwasher may provide an intensified wash effect. The dishwasher may include a rack defining a bottom and a sidewall, wherein the rack is adapted to receive dishware therein. A dishwashing fluid supply channel may be configured to supply dishwashing fluid to a spray assembly. The spray assembly may comprise at least one nozzle member. Thereby, the spray assembly may be adapted to receive the dishwashing fluid from the dishwashing fluid supply channel and to dispense the dishwashing fluid therethrough. The spray assembly may be coupled to the sidewall of the rack. Further, the nozzle member may be attached to an arm which is moveable between at least a first position wherein the arm is adjacent the sidewall of the rack and a second position wherein the arm is adjacent the bottom of the rack.