Dishwasher Zone-Selective Water Injection for Variable Load Efficiency
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Solution Overview
Problem
Conventional dishwashers lack the ability to adjust wash water distribution and duration based on the specific loading state of dishes, leading to inefficient washing, especially when many dishes are piled up in certain areas.
Innovation Solution
A dishwasher controlling method that differentiates the amount and duration of wash water supplied to top, upper, and lower injection units based on the selected storage unit, allowing for variable operation modes to intensively wash dishes in specific areas, with a transfer valve controlling the flow paths and a controller managing the wash water supply and rotation numbers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wash water is injected at uniform intervals and pressure to all storage units, then the washing process is simple to control, but dishwashing efficiency deteriorates when dishes are concentrated in specific areas
Solution Approach 1:
The patent implements dynamic control of wash water injection by allowing users to select specific storage units (upper, lower, top) that require intensive washing. The controller adjusts the operation modes of injection units based on the selected storage unit, changing injection intervals and pressure dynamically rather than using uniform injection for all units. This resolves the contradiction by making the washing system adaptive to actual dish loading conditions.
Solution Approach 2:
The patent applies local quality by differentiating wash water injection parameters for different storage units and even different areas within storage units. When a specific storage unit is selected, the controller intensifies washing in that particular area by adjusting injection frequency and pressure locally, while other areas receive standard or reduced washing. This targeted approach improves efficiency for densely loaded areas without unnecessarily complicating the entire system.
2Loss of time
If multiple injection units operate simultaneously with equal duration, then the washing process is simple to manage, but washing time increases when only specific areas need intensive cleaning
Solution Approach 1:
The patent implements dynamic adjustment of injection duration for different injection units based on the selected storage unit. When a specific storage unit is selected for intensive washing, the controller extends the operation duration of relevant injection units while reducing or suspending operation of other units. This dynamic time management reduces total washing time compared to running all units simultaneously, while the automated controller manages the complexity of coordinating multiple units.
Solution Approach 2:
The patent applies partial action by activating only the necessary injection units corresponding to the selected storage unit rather than running all injection units simultaneously. This selective activation reduces overall washing time while the controller automatically manages the coordination, balancing time savings with operational simplicity through automated control logic.
3Manufacturing precision
If wash water supply amount is increased for intensive washing of specific areas, then cleaning effectiveness improves, but water consumption increases
Solution Approach 1:
The patent applies local quality by concentrating increased wash water supply specifically in the selected storage unit that requires intensive cleaning, while reducing or maintaining normal supply to other units. This localized increase in water consumption achieves high cleaning effectiveness where needed without proportionally increasing total water usage across the entire system, thus resolving the contradiction between cleaning effectiveness and water consumption.
Solution Approach 2:
The patent implements parameter changes by dynamically adjusting the wash water supply amount based on the selected storage unit and operation mode. The controller modifies water flow parameters (amount, pressure, duration) specifically for the intensive washing mode applied to selected areas, rather than maintaining constant high parameters throughout. This selective parameter adjustment achieves effective cleaning where needed while controlling overall water consumption.
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 dishwashing efficiency by intensively washing areas with many dishes, reducing overall washing time and improving cleaning effectiveness based on the loading configuration.
Implementation Method 1
a dishwasher is the mechanism configured to wash and dry one or more dishes held therein by injecting wash water to the dishes at a high pressure
Implementation Method 2
The dishwashers capable of enhancing washing efficiency by raising the temperature of wash water or generating steam, using a heater, have been widely popular
Implementation Method 3
a dishwasher is capable of filtering the food scraps contained in the wash water and reusing the used wash water
Data Source
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AI summary
A dishwasher control method for a dishwasher, the dishwasher comprising a washing tub comprising an upper storage unit and a lower storage unit for receiving dishes; a top injection unit provided over the upper storage unit; an upper injection unit provided between the upper storage unit and the lower storage unit; a lower injection unit provided under the lower storage unit; and a driving unit for selectively supplying wash water to each of the injection units, the dishwasher control method comprising: a setting step for setting one of an upper operation mode, a lower operation mode and a normal operation mode according to a user's selection; and an injecting step for injecting the wash water wherein the injection duration times and rotation number of the top, upper and lower injection units are differentiated according to the settings of the setting step.