Suspended Sorption Drying Unit Layout for Dishwasher Heat Protection
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Solution Overview
Problem
Existing dishwasher sorption drying systems face challenges in adequately and efficiently drying reversibly dehydratable sorption material, leading to incomplete drying and potential overheating during the desorption process.
Innovation Solution
The sorption container is arranged in a largely freely suspended manner below the base of the washing compartment with a predetermined minimum gap distance from adjacent components for heat protection, allowing for improved air flow and efficient drying during the sorption process and gentle regeneration during desorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sorption container is placed close to the base for compact accommodation, then the device complexity is reduced, but the sorption material cannot be adequately dried and may overheat during desorption
Solution Approach 1:
The sorption container is suspended below the base in the vertical dimension, creating a freely hanging arrangement with gap distances to adjacent components. This spatial reconfiguration in the vertical direction enables adequate heat protection and air circulation for reliable drying while maintaining compact horizontal footprint.
Solution Approach 2:
The sorption container is divided into separate functional zones: a drying zone with sorption material accessible to moist air from the washing compartment, and a desorption zone heated by a heating element. The container walls act as thermal insulation layers separating these zones, enabling independent control of drying and regeneration processes.
2Productivity
If a heater is placed in front of the sorption column for air heating during desorption, then the drying performance is improved, but local overheating of the sorption material occurs
Solution Approach 1:
The heating element is positioned in the lower region of the sorption container rather than in front of the entire column. This localized heating approach concentrates thermal energy in the desorption zone where moisture needs to be removed, while the upper drying zone remains cooler to prevent overheating of the sorption material.
Solution Approach 2:
The container walls with thermal insulation layers act as intermediaries that distribute and regulate heat flow within the sorption container. These walls prevent direct thermal contact between the heating element and the sorption material, allowing controlled heat transfer that avoids local overheating while maintaining effective desorption.
3Reliability
If the sorption container is freely suspended with gap distances, then heat protection and adequate drying are achieved, but the device requires more complex mounting structure
Solution Approach 1:
The container walls themselves provide thermal insulation functionality, eliminating the need for separate insulation components. The freely suspended arrangement with gap distances to adjacent components creates natural thermal barriers, allowing the structure to protect against overheating through its own geometric configuration rather than additional protective elements.
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 arrangement ensures reliable, energy-efficient drying of items and proper regeneration of the sorption material, preventing overheating and enhancing the overall drying performance of the dishwasher.
Implementation Method 1
a sorption drying system TS for drying items to be washed, the sorption drying system having at least one sorption compartment SB with reversibly dehydratable sorption material SE
Implementation Method 2
at least one heating device HZ, with which an equivalent heating power of between 250 and 2500 W, in particular between 1000 and 1800 W, preferably between 1200 and 1500 W, can be provided for heating the sorption material for its desorption
Implementation Method 3
Water stored in this material escapes as hot water vapor
Implementation Method 4
moist air from the washing compartment of the dishwasher is passed through the sorption column by means of a blower
Data Source
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AI summary
The invention relates to the drying unit of a dishwasher (GS), which comprises at least one sorption container (SB) containing a sorption material (ZEO) that can be reversibly dehydrated. Said sorption container is connected to the tub (SPB) of the dishwasher via at least one air-conducting channel (LK). The sorption container (SB) is arranged below the bottom (BO) of the tub (SPB) in a substantially suspended manner such that it has a maximum gap distance (LSP) in relation to adjacent components and/or parts of a bottom assembly (BG) to provide heat protection.