Dishwasher Microbubble Nozzle Design for Bottom Contamination Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dishwashers struggle to effectively remove contamination that falls to the bottom of the tub during the washing process, leading to potential odor and bacterial growth issues.
Innovation Solution
A dishwasher design incorporating a tub, wash arms, bubble nozzles that eject microbubbles, a sump for collecting wash water, and a control system that alternately or simultaneously sprays wash water through wash arms and bubble nozzles to collect and sterilize contamination at the bottom of the tub.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wash water is sprayed through wash arms at high pressure, then cleaning effectiveness is improved, but contamination accumulates at the bottom of the tub
Solution Approach 1:
The system alternates between washing mode (spraying through wash arms) and draining mode (spraying through bubble nozzles at bottom) in periodic cycles. During washing, contamination falls to the bottom; during draining, the bubble nozzles eject wash water to lift and remove the accumulated contamination, preventing odor and bacterial growth
Solution Approach 2:
The washing function is segmented into two distinct modes: upper wash arms for initial cleaning and bottom bubble nozzles for contamination removal. This segmentation allows each component to specialize in a specific cleaning task, with wash arms handling dish surfaces and bubble nozzles handling tub bottom contamination
2Object-generated harmful factors
If bubble nozzles are added to eject wash water containing microbubbles, then contamination removal is improved, but device complexity increases
Solution Approach 1:
The bubble nozzles serve multiple functions: they eject wash water to lift contamination, generate microbubbles for enhanced cleaning, and facilitate drainage. This multi-functionality reduces the need for separate components, offsetting the added complexity with operational efficiency
Solution Approach 2:
The system uses hydraulic principles where wash water pressure drives both the wash arms and bubble nozzles. The same water pump supplies both systems, and the channel-switching unit directs water flow using pneumatic/hydraulic control, integrating multiple functions through fluid dynamics rather than separate mechanical systems
3Stress or pressure
If wash pump pressure is increased for better spraying, then wash arm performance is improved, but bubble nozzle ejection effectiveness decreases
Solution Approach 1:
The system dynamically adjusts wash pump pressure based on operational mode. During wash arm operation, high pressure is maintained for effective spraying. During bubble nozzle operation, pressure is reduced to optimal levels for microbubble generation and gentle contamination lifting, preventing damage while maintaining effectiveness
Solution Approach 2:
The controller monitors pump pressure and operational phase, adjusting pressure in real-time based on feedback from sensors and control logic. This feedback mechanism ensures pressure is optimized for the current operation mode, automatically switching between high-pressure wash arm mode and lower-pressure bubble nozzle mode
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
The system efficiently collects and sterilizes contamination at the bottom of the tub, preventing it from sticking and reducing bacterial growth, while also managing wash water pressure to ensure effective cleaning and rinsing cycles.
Implementation Method 1
a bubble module generating microbubbles in wash water pumped by the wash pump and supplying the wash water containing microbubbles to the bubble nozzle
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
Disclosed is a dishwasher ejecting wash water containing microbubbles. The dishwasher according to an embodiment includes a tub accommodating dishes therein, a plurality of wash arms spraying wash water into the tub, a bubble nozzle ejecting wash water containing microbubbles to the bottom of the tub, a sump disposed below the bottom of the tub and collecting wash water therein, a wash pump pumping wash water collected in the sump, a channel-switching unit supplying wash water pumped by the wash pump to at least one of the plurality of wash arms, and a bubble module generating microbubbles in wash water pumped by the wash pump and supplying the wash water containing microbubbles to the bubble nozzle, and a controller operates the wash pump and controls the channel-switching unit and the bubble module to spray wash water through at least one of the plurality of wash arms and simultaneously to eject wash water through the bubble nozzle.