Dishwashing Temperature Profile for Fast Cleaning and Low Energy
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Solution Overview
Problem
Conventional automatic dishwashing machine cycles that reduce washing time compromise cleaning performance, shine, and spotting results, and care cycles are not suitable for heavily soiled dishes, while increasing wash temperature is inefficient and environmentally unfriendly.
Innovation Solution
A washing cycle with precise control of water loading and temperature profiles in both the wash and rinse steps, using a detergent composition with a terpolymer, non-ionic surfactant, and complexing agents, to achieve efficient cleaning, shine, and spotting performance within a short duration and low energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If washing time is reduced to meet consumer demand for faster cycles, then productivity is improved, but cleaning performance deteriorates
Solution Approach 1:
The patent changes the temperature parameter profile during the washing cycle, using higher temperatures in specific phases to maintain cleaning effectiveness while reducing overall cycle time. The temperature is dynamically adjusted throughout the wash, rinse, and dry phases to optimize both speed and performance.
Solution Approach 2:
The washing cycle employs periodic action through multiple distinct phases (wash, rinse, dry) with alternating temperatures and water applications. This structured periodic approach ensures thorough cleaning while maintaining a compressed overall timeline.
2Reliability
If wash temperature is increased to maintain cleaning performance in shorter cycles, then cleaning performance is preserved, but energy consumption increases
Solution Approach 1:
The patent applies dynamics by continuously adjusting the temperature profile throughout the washing cycle rather than maintaining a constant high temperature. The temperature is dynamically modified across different phases (wash, rinse, dry) to achieve effective cleaning while minimizing total energy consumption.
Solution Approach 2:
The system performs preliminary heating of water before it contacts the dishes, and maintains optimal temperature during critical washing phases. This preliminary preparation ensures efficient heat utilization and reduces wasted energy during the cycle.
3Productivity
If higher temperature is used to compensate for reduced washing time, then cleaning performance is maintained, but care profile deteriorates due to aggressive treatment
Solution Approach 1:
The temperature profile is dynamically adjusted to be higher during the main wash phase for effective cleaning, then reduced during rinse and dry phases. This dynamic modification protects delicate dishware from sustained high-temperature exposure while maintaining cleaning effectiveness during the critical wash period.
Solution Approach 2:
The washing cycle is segmented into distinct phases (wash, rinse, dry) with different temperature characteristics. The high temperature is confined to specific segments where cleaning is most needed, while other segments use lower temperatures to protect the dishware, thus resolving the contradiction between speed and care.
Data Source
AI summary
A method of treating dishware in a domestic automatic dishwashing machine, wherein the method has a total duration of from 30 to 50 mins and comprises a wash and a rinse step, wherein at the start of the wash step from 2.0 to 5.0 litres of water is used for a duration of from 15 to 30 mins having a temperature profile such that at least 10 mins of the wash step is carried out a temperature in the range of from 40°C to less than 50°C, wherein at the start of the rinse step from 2.0 to 5.0 litres of additional water is used for a duration of from 15 to 30 mins havinga temperature profile such that at least 7mins of the rinse cycle is carried out a temperature in the range of from 55°C to 65°C.