Dishwasher Sorption Drying Airflow Layout to Prevent Desiccant Overheating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Dishwasher machines with sorption drying systems face challenges in completely drying reversibly dehydratable desiccants during the desorption process, leading to incomplete drying and potential material damage due to local overheating.
Innovation Solution
The air ducting channel is coupled to the sorption compartment in a way that airflow enters and changes direction, allowing it to flow through the sorption compartment, ensuring efficient and reliable drying of washed items and subsequent regeneration of the sorption material, while preventing overheating through flow conditioning and thermal protection measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sorption material is heated to very high temperatures for desorption, then the sorption material can be regenerated, but local overheating occurs causing potential material damage
Solution Approach 1:
The patent applies local quality by creating a differentiated temperature distribution within the sorption compartment. The airflow path is designed to pass through specific regions (side walls and bottom) rather than uniformly heating the entire compartment, allowing controlled desorption in targeted areas while preventing excessive temperature buildup that would cause local overheating and material damage.
Solution Approach 2:
The patent transitions from conventional single-direction heating to multi-dimensional airflow distribution. By introducing airflow through multiple pathways (side walls and bottom) simultaneously, the system achieves more uniform heat distribution across the sorption material volume, preventing localized temperature peaks while maintaining effective desorption.
2Use of energy by moving object
If conventional air heating is used before the sorption column, then energy is saved, but the sorption material cannot be completely dried
Solution Approach 1:
The patent segments the heating function into multiple airflow paths distributed through the sorption compartment (side walls and bottom) rather than using a single pre-heating stage. This segmentation allows the system to maintain energy efficiency while achieving complete drying by ensuring thorough airflow penetration throughout the sorption material.
Solution Approach 2:
The patent implements continuous airflow through the sorption compartment during the desorption phase, maintaining constant moisture removal action. This continuous useful action ensures complete drying of the sorption material while preserving energy efficiency, as the system operates throughout the entire desorption cycle rather than using intermittent high-energy heating bursts.
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 configuration ensures energy-efficient and reliable drying of washed items and effective regeneration of the sorption material, preventing material damage and optimizing energy use in both drying and washing cycles.
Implementation Method 1
moist air which is conveyed via the air ducting channel from the washing compartment into the sorption compartment, and flows through said compartment's sorption unit with the sorption desiccant, can be perfectly dried by sorption
Implementation Method 2
for the regeneration, that is to say desorption of the sorption column, its reversible dehydratable desiccant is heated up to very high temperatures. Water stored in this material therefore emerges as hot water vapor
Data Source
AI summary
A dishwasher having a washing compartment; an air ducting channel to generate an airflow; and a sorption drying system to dry wash items. The sorption drying system has a sorption compartment with reversibly dehydratable sorption material that is connected to the washing compartment via the air ducting channel. The air ducting channel is coupled to the sorption compartment such that the airflow enters the sorption compartment with an inflow direction and changes direction to a through-flow direction in which the airflow flows through the inside of the sorption compartment.