Dishwasher Spray Control Assembly for Bidirectional Arm Rotation
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Solution Overview
Problem
Conventional dishwashing appliances with fixed-direction spray arms may limit the cleaning effectiveness by not being able to direct fluid onto all surfaces of articles, and the limited capacity of pumps due to energy and water regulations restrict simultaneous fluid supply to multiple spray assemblies.
Innovation Solution
A spray control assembly that utilizes concentric flow paths and a diverter with multiple outlet ports to selectively control the flow and rotational direction of spray arm assemblies, allowing for bidirectional rotation and independent fluid supply to different spray assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spray arms are configured to rotate in only one fixed direction, then the device structure is simple, but the cleaning effectiveness is limited because fluid cannot be directed onto all surfaces of articles
Solution Approach 1:
The spray arm assembly is configured to rotate in multiple directions (clockwise and counter-clockwise) rather than being fixed in a single direction. This dynamic capability allows the spray arms to direct fluid onto different surfaces of articles, improving cleaning effectiveness while maintaining structural simplicity through a reversible rotation mechanism
2Productivity
If the pump supplies fluid to multiple spray assemblies simultaneously, then all spray assemblies can operate at full capacity, but energy and water usage exceed government regulations
Solution Approach 1:
The system uses periodic action by alternating the operation of different spray assemblies rather than running them simultaneously. The controller can activate one spray assembly at a time in a sequential manner, ensuring that energy and water consumption remain within regulatory limits while still providing comprehensive cleaning coverage over the washing period
Solution Approach 2:
The system performs preliminary action by pre-rinsing or pre-spraying certain areas before the main washing cycle. This allows the pump to supply fluid to different spray assemblies at different times, optimizing water and energy usage while ensuring all articles receive adequate cleaning attention
3Adaptability or versatility
If the diverter switches between multiple outlet ports to control fluid flow, then selective control over spray assemblies is achieved, but the device complexity increases
Solution Approach 1:
The diverter mechanism is designed with multi-functionality to handle multiple outlet ports and spray assembly configurations. By creating a universal diverter that can route fluid to different destinations based on operational needs, the system achieves selective control over spray assemblies while managing complexity through a standardized, multi-purpose component design
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
Enhances cleaning efficiency by ensuring all surfaces of articles are sprayed effectively and optimizes water and energy usage by allowing selective control over fluid flow and rotation direction, improving the overall performance of the dishwashing appliance.
Implementation Method 1
A pump provides for a flow of fluid for cleaning the articles. The diverter is configured for switching between the fluid outlet ports to provide for a fluid flow out of one of the fluid outlet ports at a time.
Implementation Method 2
The adapter includes a first channel positioned to receive fluid from the first outlet port and has a first channel outlet configured to provide fluid. A second channel is positioned to receive fluid from the second outlet port and has a second channel outlet configured to provide fluid. The first channel outlet and the second channel outlet are concentric and the second channel outlet surrounds the first channel outlet.
Data Source
AI summary
A spray control assembly for a dishwashing appliance is provided. Using concentric flow paths, the spray control assembly allows selection of e.g., the rotational direction for at least one spray arm assembly. The selection of flow through e.g., multiple different spray assemblies is also provided. The spray control assembly incorporates a diverter having multiple port selections.