Method of performing a washing program
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Solution Overview
Problem
The existing washing programs in dishwashers result in inefficient use of resources, particularly heating energy and water, due to the intermediate rinse section which cools down the washing compartment and items, and requires additional heating for the subsequent rinse, and excessive water usage.
Innovation Solution
Implementing a dripping pause at the end of the cleaning program section where liquid circulation stops, followed by emptying the washing liquid and then performing a rinse, which omits the conventional intermediate rinse, allowing thermal energy from the cleaning phase to be transferred to the final rinse and reducing water usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an intermediate rinse program section is included to remove residual washing liquid, then the washing quality is improved, but water consumption increases and heating energy is wasted due to cooling and reheating
Solution Approach 1:
The patent extracts and eliminates the intermediate rinse program section from the washing cycle, keeping only the essential cleaning and final rinse sections. This removal eliminates the unnecessary water consumption and energy waste associated with the intermediate rinse while maintaining washing quality through the optimized dripping pause and final rinse with rinse aid.
Solution Approach 2:
The patent changes the parameter of rinse aid dosage timing and amount, dosing a larger amount of rinse aid in the cleaning program section before the dripping pause rather than in the intermediate rinse. This parameter change allows the rinse aid to enhance the dripping effect during the pause, effectively removing residual washing liquid without requiring an water-intensive intermediate rinse.
2Reliability
If an intermediate rinse program section is included to remove residual washing liquid, then the washing quality is improved, but heating energy consumption increases due to cooling and subsequent reheating
Solution Approach 1:
The patent extracts and eliminates the intermediate rinse program section that causes thermal energy loss. By removing this section, the system avoids the energy-intensive cycle of heating water for intermediate rinsing, allowing the thermal energy from the cleaning phase to be retained and transferred to the final rinse phase.
Solution Approach 2:
The patent maintains continuity of useful thermal action by eliminating the thermal interruption caused by the intermediate rinse. The heat stored in the washing container and items during cleaning is preserved and continuously transferred to the final rinse, maintaining thermal efficiency throughout the washing cycle without the energy-wasting cooling and reheating cycle.
3Reliability
If rinse aid is dosed in the intermediate rinse program section, then residual washing liquid is effectively removed, but additional water and energy are consumed
Solution Approach 1:
The patent applies preliminary action by dosing the rinse aid in the cleaning program section before the dripping pause, rather than in the intermediate rinse. This preliminary dosing allows the rinse aid to be present and effective during the dripping pause, enhancing the removal of residual washing liquid through surface tension reduction without requiring additional water or energy-intensive intermediate rinsing.
Solution Approach 2:
The patent extracts the rinse aid dosing action from the intermediate rinse program section and relocates it to the cleaning program section. This repositioning eliminates the need for an water-intensive intermediate rinse while maintaining effective residual liquid removal through the combination of extended dripping pause and strategically timed rinse aid dosing.
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
This approach saves water and heating energy by transferring stored thermal energy from the cleaning phase to the final rinse, effectively removing residual washing liquid without the need for additional heating, while ensuring efficient rinsing through optimal rinsing aid usage.
Implementation Method 1
a circulating pump (4) which conveys the washing liquid (40) in a circuit
Implementation Method 2
conveys the washing liquid in a circuit via pressure nozzles to spray devices
Implementation Method 3
A heating device is arranged within the circuit, which heats the washing liquid in certain program sections
Implementation Method 4
If rinse aid is metered into the washing liquid in the cleaning program section before the dripping pause. This triples the amount of residual washing liquid that drips off the dishes
Implementation Method 5
conveys the washing liquid in a circuit via pressure nozzles to spray devices arranged inside the washing container, from there the washing liquid rains onto the items to be washed
Data Source
Figure 1
AI summary
The method involves supplying the liquid collected in the lower area of a rinsing tank (2) in the circulation to spraying units (8,9,10) and from there to wash ware by a circulating pump (4). The rinsing program has program phases of cleaning and rinsing. A draining pause, in which the circulation of liquid stops, is carried out at the end of cleaning program phase. The rinsing liquid is discharged from the rinsing tank after the draining pause.