Dishwasher Sorption Drying Timing for Early Zeolite Desorption
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Solution Overview
Problem
Sorption drying systems in dishwashers face inefficiencies in desorption processes, particularly due to reduced moisture absorption capacity of air as it heats up, affecting drying and energy efficiency.
Innovation Solution
Implementing a method where the desorption process for reversibly dehydratable drying materials like zeolite is conducted at least partially before or during program steps involving heated liquids, such as pre-rinse, cleaning, or rinsing, to optimize moisture absorption and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If desorption is carried out after heating during later program steps, then the drying material has been regenerated, but the air moisture absorption capacity is reduced due to heating
Solution Approach 1:
The patent performs desorption of the drying material before or during the first heating program step, when air temperature is still low and moisture absorption capacity is high. This preliminary timing of desorption allows the drying material to release moisture into air that can still effectively absorb and remove it, avoiding the problem of reduced absorption capacity that occurs during later heated program steps.
2Productivity
If desorption is delayed to later program steps, then heating has already occurred, but the drying effectiveness is reduced due to lower air moisture absorption capacity
Solution Approach 1:
The patent schedules desorption to occur before or during the first heating step rather than delaying it to later program steps. This ensures that moisture is released from the drying material when air moisture absorption capacity is still high, maximizing drying effectiveness and avoiding the reduced performance that would result from delayed desorption.
3Reliability
If desorption is performed early before heating, then air moisture absorption capacity is maximized, but the heating benefit for cleaning action is reduced
Solution Approach 1:
The patent merges the desorption process with the first heating program step, allowing both processes to occur simultaneously or in overlapping time periods. This integration ensures that desorption benefits from high air moisture absorption capacity while the heating process provides thermal energy for effective cleaning action, achieving both goals without compromise.
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 enhances the desorption efficiency, improves cleaning action, reduces the length of the drying program, and increases the drying effect, leading to a more energy-efficient and effective sorption drying process.
Implementation Method 1
moisture is removed by the reversibly dehydratable drying material in the sorption container from the air that has passed through it
Implementation Method 2
Water stored in this drying material consequently exits as hot water vapor
Implementation Method 3
Water stored in this drying material consequently exits as hot water vapor
Implementation Method 4
a heated liquid is applied to the wash items, at least at times, during at least two of a multiplicity of program steps
Data Source
AI summary
In a method for operating a dishwasher containing wash items, in particular a household dishwasher, at least at times a heated liquid to the wash items is applied during at least two of a plurality of program steps. A desorption process for desorption of a reversibly dehydratable drying material of a sorption drying system is effected at least at times. The desorption process is carried out at least partially before or during a first of the at least two program steps, with heated liquid being applied to the wash items during the at least two program steps.