Conveyor Dishwasher Heat Exchanger and Vortex Filtration Layout
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Solution Overview
Problem
Conventional dishwashers face issues with energy inefficiency due to complex drying device equipment, increased fuel costs, and unsanitary conditions caused by reused wash water contaminated with food waste, which blocks filtration systems, reducing washing effectiveness.
Innovation Solution
A dishwasher design that uses a single heat exchanger to preheat wash and rinse water and supply hot air to a drying chamber, combined with a filtering device featuring a vortex-inducing wall to improve wash water circulation and sanitation, by forming a vortex that separates food waste from the filtration system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a porous filtering device is installed in the wash water tank to filter food waste, then food waste filtration is improved, but the outlet of the filtering device becomes blocked by food waste, reducing wash water discharge efficiency
Solution Approach 1:
Instead of allowing water to flow upward through the filter as in conventional designs, this patent inverts the flow direction by using a downward-sloping filter outlet structure. The filter outlet is positioned lower than the water surface, allowing filtered water to discharge downward and outward, preventing food waste from blocking the outlet while maintaining effective filtration.
2Quantity of substance
If wash water is reused after washing dishes, then water consumption is reduced, but the wash water becomes contaminated with food waste, creating unsanitary conditions and reducing washing effectiveness
Solution Approach 1:
The patent employs a porous filtering device with numerous small holes that allow water to pass through while trapping food waste particles. The porous structure provides large surface area for filtration, enabling effective separation of clean water from contaminated water and food waste, thus maintaining sanitation quality during water reuse.
Solution Approach 2:
The filtering device extracts and removes food waste from the used wash water before it is recirculated. By separating the harmful food waste particles from the water stream through the porous filter, the system enables safe reuse of the filtered water while preventing contamination buildup.
3Temperature
If conventional heating devices are used to supply hot water and hot air, then heating function is achieved, but equipment complexity increases due to booster systems and piping, and energy consumption increases
Solution Approach 1:
The patent employs a single heat exchanger that simultaneously performs multiple functions: heating wash water, heating rinse water, and generating hot air for the drying chamber. This multi-functional design eliminates the need for separate heating systems and complex piping networks, reducing equipment complexity while maintaining comprehensive heating capability.
Solution Approach 2:
The patent merges the heating functions for water and air generation into a single integrated heat exchanger system. By combining these previously separate functions into one device, the system reduces the number of components, simplifies the overall equipment structure, and improves energy efficiency through shared thermal processing.
4Temperature
If conventional heating devices are used to supply hot water and hot air, then heating function is achieved, but energy consumption increases because exhaust heat cannot be recycled
Solution Approach 1:
The heat exchanger recovers thermal energy that would otherwise be wasted during the heating process. By efficiently transferring heat to both the water and air streams, the system maximizes energy utilization and prevents heat loss, thereby reducing overall energy consumption while maintaining the required temperature levels for washing and drying operations.
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 saves energy, improves wash water circulation, and enhances sanitation by preventing food waste from blocking the filtration system, leading to more efficient and hygienic dishwashing.
Implementation Method 1
a heat exchanger allowing hot air to be supplied to the drying chamber by heat exchange
Implementation Method 2
wash water and rinse water are preheated
Implementation Method 3
a vortex-inducing wall surrounding the outer circumferential surface of the filter cylinder at a location spaced outward from the outer circumferential surface of the filter cylinder in a width direction of the filter cylinder
Implementation Method 4
by the vortex-inducing wall, a vortex having a streamline of wash water is formed in a direction parallel to the outer circumferential surface of the filter cylinder
Data Source
AI summary
Disclosed a dishwasher, wherein dishes placed on a conveyor are washed, rinsed, and dried while being sequentially conveyed to a washing chamber, a rinsing chamber, and a drying chamber, the dishwasher including: a heat exchanger allowing hot air to be supplied to the drying chamber by heat exchange; a wash water tank in which water supplied to the washing chamber or the rinsing chamber is stored; and a spray device spraying water supplied from the wash water tank onto the dishes placed on the conveyor, whereby it is possible to save energy by providing a single heat exchanger to preheat wash water and rinse water and supply hot air to the drying chamber, and to improve circulation of wash water by a filtering device applied to a structure for reusing wash water, thereby improving sanitation of dishwashing.