Dishwasher Additive Feed Control for Pressure and Noise Reduction
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Solution Overview
Problem
Existing dishwashers do not efficiently optimize resource use and noise reduction, particularly when using additives like rinse aid, as they do not account for the additive's effect on washing liquor behavior and soiling intensity, leading to increased energy consumption and noise.
Innovation Solution
A dishwasher with a feed device for additives that allows pressure adjustment based on additive metering and turbidity sensing, enabling automatic detection and selection of additive usage, which reduces pressure in washing apparatuses to optimize energy use and minimize noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure is increased to improve washing performance, then cleaning effectiveness is improved, but energy consumption and noise increase
Solution Approach 1:
The system dynamically adjusts pump pressure based on real-time detection of additive presence and turbidity levels. The pressure is not fixed but varies according to washing conditions, optimizing energy use while maintaining effective cleaning when needed.
Solution Approach 2:
The system changes the pressure parameter based on detected conditions (additive presence, turbidity). When additives are detected or turbidity is high, pressure is increased to ensure proper washing; otherwise, pressure is reduced to save energy and minimize noise.
2Reliability
If pressure is increased to improve washing performance, then cleaning effectiveness is improved, but noise emissions increase
Solution Approach 1:
The pump pressure is dynamically adjusted based on washing conditions. When additives are present or turbidity is high, higher pressure is applied for effective cleaning; otherwise, pressure is reduced to minimize noise emissions during the washing cycle.
Solution Approach 2:
The system changes the pressure parameter according to detected conditions (additive presence, turbidity levels). This conditional parameter adjustment ensures that high pressure is only used when necessary for cleaning effectiveness, thereby reducing noise emissions during low-demand phases.
3Loss of substance
If additive metering is optimized to improve resource efficiency, then resource use is optimized, but system complexity increases
Solution Approach 1:
The system uses sensors to detect additive presence and turbidity levels, providing feedback to the control unit. Based on this feedback, the system automatically adjusts pump pressure and additive metering, optimizing resource efficiency without requiring complex manual intervention or oversight.
Solution Approach 2:
The system performs self-adjustment of pressure and additive metering based on sensor inputs. The control unit autonomously determines the appropriate pressure level and additive dosage, eliminating the need for user intervention and reducing operational complexity while improving resource efficiency.
Data Source
AI summary
A dishwasher, in particular a domestic dishwasher, having a dishwashing compartment and apparatuses for washing tableware using washing liquor, wherein it is possible to set the pressure in the apparatuses for washing tableware. A feed apparatus for an additive is provided, and the pressure in the apparatuses for washing tableware can be set as a function of the metering of the additive in the feed apparatus.