Hood-Type Dishwasher Zoning for Mixed Soil Batch Washing
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Solution Overview
Problem
Commercial batch dishwashers face bottlenecks during peak times due to long cycle times required for heavily soiled items, leading to reduced capacity and increased manual handling, while resources like energy, water, and chemicals are not optimized for efficiency.
Innovation Solution
A hood-type dishwasher with a treatment chamber divided into two zones, allowing independent treatment of washware based on soiling levels, where the main zone handles lightly soiled items efficiently and an auxiliary zone handles heavily soiled items with extended cycles, optimizing resource use and capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single treatment chamber is used to handle all washware, then the dishwasher structure remains simple, but during peak times the long cycle times for heavily soiled items block the dishwasher and reduce overall capacity
Solution Approach 1:
The treatment chamber is divided into two independent treatment zones: a first treatment zone for lightly soiled items with shorter cycle times, and a second treatment zone for heavily soiled items with extended cycle times. This segmentation allows parallel processing of different washware types, increasing overall dishwasher capacity during peak times without requiring a completely separate machine.
2Reliability
If extended cycle times are used for heavily soiled items, then wash performance improves, but the dishwasher is blocked for longer periods reducing overall throughput
Solution Approach 1:
By segmenting the treatment chamber into two zones with different cycle times, the system can maintain high wash performance for heavily soiled items in the second zone while simultaneously processing lightly soiled items in the first zone, thereby preventing bottlenecks and maintaining overall throughput.
Solution Approach 2:
The system varies the treatment parameters (cycle time, spray intensity, temperature) for different zones based on the soiling level of the washware. The second treatment zone uses extended cycle times and intensified washing parameters for heavily soiled items, while the first zone uses shorter, lighter cycles for lightly soiled items, optimizing both wash performance and productivity.
3Reliability
If resources are allocated to handle heavily soiled items with extended cycles, then cleaning quality improves, but energy, water, and chemical consumption increase
Solution Approach 1:
The system applies different resource intensities to different zones based on local needs. The second treatment zone for heavily soiled items receives extended cycle times and higher resource allocation, while the first treatment zone for lightly soiled items uses reduced resources. This local differentiation optimizes cleaning quality where needed while minimizing overall resource consumption.
Solution Approach 2:
The control system adjusts washing parameters (water flow rate, spray pressure, temperature, chemical dosage, cycle duration) based on the detected soiling level and selected program for each zone. This parameter optimization ensures adequate cleaning quality for heavily soiled items while reducing resource waste on lightly soiled items.
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 solution enables continuous operation during peak times without blocking the dishwasher, improving wash performance for heavily soiled items while maintaining capacity for lightly soiled items, and reducing energy, water, and chemical consumption.
Implementation Method 1
The wash liquid contained in the wash tank can be conveyed from the wash pump to the wash nozzles via the line system
Implementation Method 2
The sprayed wash liquid then flows back into the wash tank
Implementation Method 3
the treatment chamber has a first treatment zone and at least one further, second treatment zone, wherein items of washware can be treated independently of one another
Data Source
Figure 1a
Figure 1b
Figure 2
AI summary
The invention relates to a dishwasher (1) in the form of a commercial utensil washer or dishwasher which is designed as a batch dishwasher and is realized as a hood-type dishwasher, wherein the dishwasher (1) has a treatment chamber (2) with at least one wash system which is designed as a recirculation system, wherein the treatment chamber (2) has a first treatment zone (6) and at least one further, second treatment zone (7), wherein items ofwashware can be treated independently of one another and at least temporarily at the same time in the first and in the at least one second treatment zone (6, 7).