Corrugated Dishwasher Pipeline Venting for Bubble-Free Heat Transfer
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Solution Overview
Problem
Dishwashers face inefficiencies in heat transfer due to air bubble accumulation and impurity clogging in corrugated pipelines, leading to reduced operational reliability and heat transfer efficiency.
Innovation Solution
The corrugated pipeline design incorporates an air duct to vent air bubbles, sections without corrugations to prevent impurity accumulation, and a helical contour to create a whirlpool motion for self-cleaning, ensuring complete liquid flow and enhanced heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the pipeline is designed as a corrugated pipeline to increase heat transfer surface, then heat transfer efficiency is improved, but air bubbles accumulate in the wave crests forming insulation layers that reduce heat transfer efficiency
Solution Approach 1:
The patent extracts the harmful air bubbles from the pipeline by providing an air duct that connects the wave crests to the pipeline interior, allowing air bubbles to be removed from the heat transfer surface and preventing the formation of insulating air layers that would reduce heat transfer efficiency
Solution Approach 2:
The patent segments the pipeline into functional zones by providing air ducts that create separate pathways for air bubble removal while maintaining the corrugated structure for heat transfer, allowing the wave crests to serve both heat transfer and air venting functions
2Area of stationary object
If the corrugated pipeline is laid in a meandering pattern to achieve the longest possible route, then heat transfer surface area is maximized, but air bubbles remain trapped in the wave crests of horizontal sections
Solution Approach 1:
The patent extracts trapped air bubbles from the meandering pipeline sections by providing air ducts at strategic locations that connect wave crests to the pipeline interior, enabling air removal even from horizontal meander sections where bubbles would otherwise be trapped
Solution Approach 2:
The air duct acts as an intermediary structure that mediates between the corrugated pipeline walls and the pipeline interior, providing a pathway for air bubbles to travel from the wave crests to the main flow where they can be carried away
3Temperature
If the pipeline has a corrugated design with wave crests and troughs, then heat transfer surface is increased, but impurities accumulate in the downward-pointing wave crests causing clogging and insulation
Solution Approach 1:
The patent extracts accumulated impurities from the wave crests by providing air ducts that facilitate flow through the corrugated sections, preventing impurity buildup that would cause clogging and thermal insulation
Solution Approach 2:
The patent introduces dynamic flow characteristics by providing air ducts that enable continuous flushing of the corrugated sections, preventing static impurity accumulation in the wave crests and maintaining ongoing heat transfer efficiency
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 design enhances operational reliability and heat transfer efficiency by eliminating insulation from air bubbles and impurities, allowing for rapid and effective heat transfer without additional design complexity.
Implementation Method 1
the outer surface of the pipeline is corrugated in the longitudinal direction of the pipe, and therefore has corrugations that are rotationally symmetrical about a pipe axis running in the longitudinal direction of the pipe, so that crests and troughs alternate in the longitudinal direction of the pipe. The pipe surface area provided by the pipeline can thus be increased significantly in contrast to a pipeline designed without corrugations, which allows for faster heat transfer and a higher degree of efficiency when used as intended.
Implementation Method 2
the corrugated pipeline provides an air duct that runs at least in sections in the longitudinal direction of the pipe and fluidly connects adjacent crests with one another
Implementation Method 3
the corrugated pipeline has a corrugated contour that runs helically at least in sections around an axis in the longitudinal direction of the pipe
Data Source
AI summary
The invention relates to a dishwasher, in particular a household dishwasher, with a washing compartment that provides a washing chamber and is used to hold items to be cleaned, with a fresh water tank that is arranged at the same level as the washing compartment and with a pipeline (23) that runs through the fresh water tank at least in sections and is designed as a corrugated pipeline and is fluidically connected to the washing container both on the inlet side and on the outlet side, with the corrugated pipeline (23) providing an air duct (31) which runs at least in sections in the longitudinal direction (30) of the pipe and connects adjacent corrugation crests (28) to one another in terms of flow.