System for loading a dishwasher and dishwasher having a system of this kind

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Solution Overview

Problem

Conventional conveyor dishwashers require significant manual labor for loading and sorting of washware, leading to increased physical strain and inefficiency, particularly when handling trays that occupy a large surface area and necessitate double handling.

Innovation Solution

A system for automatic or partially automatic loading of a conveyor dishwasher, featuring a feed conveyor belt, sorting arrangement, and loading arrangements that categorize washware into groups like cutlery, trays, and crockery, using detectors and manipulators to streamline the process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If trays are placed on the conveyor belt transverse to the conveying direction, then trays can be sorted by type and prevented from casting spray shadows, but the available surface area of the conveyor belt is completely occupied and cleaning time for trays increases significantly

Engineering Contradiction:
Improvecleaning qualityVSAvoidcleaning speed
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The conveyor belt is divided into multiple lanes (first lane for trays, second lane for other washware). This segmentation allows trays to be conveyed separately from other items, enabling them to be placed lengthwise without blocking space for other washware, thus resolving the contradiction between proper tray orientation for cleaning quality and space utilization for productivity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Instead of placing trays only in the transverse direction (occupying all surface area), the solution uses the longitudinal dimension by creating parallel lanes. Trays are placed in the first lane while other washware is placed in the second lane, both extending in the conveying direction, thereby utilizing the third dimension (depth/width of conveyor) to resolve the space occupation issue

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Ease of operation

If trays are manually picked up and placed onto the conveyor belt, then sorting by type can be performed, but the amount of manual work and physical strain on operating personnel increases

Engineering Contradiction:
Improvesorting capabilityVSAvoidmanual labor requirement
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The system enables automatic loading where the conveyor apparatus itself performs the sorting and placement functions. The automatic loading arrangement picks up washware from the feed conveyor belt and places it in the appropriate lanes without requiring manual intervention, thereby maintaining sorting capability while eliminating manual labor and physical strain on personnel

Inventive Principle:
Principle #25Self-service

3Ease of operation

If trays are placed in the conveyor belt transverse to the conveying direction, then sorting by type is achieved, but all available surface area of the conveyor belt is taken and other washware cannot be cleaned simultaneously

Engineering Contradiction:
Improvesorting efficiencyVSAvoidmulti-item cleaning capability
Core Design Contradiction:
Ease of operationVSAdaptability or versatility

Solution Approach 1:

The conveyor belt is segmented into multiple independent lanes. The first lane is dedicated for trays placed lengthwise, while the second lane accommodates other washware. This segmentation allows simultaneous cleaning of different types of washware without interference, resolving the contradiction between sorting efficiency and multi-item cleaning capability

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The solution transitions from a single-plane transverse placement to a multi-lane longitudinal arrangement. By utilizing the width dimension of the conveyor to create parallel lanes, the system can handle multiple types of washware simultaneously, each lane operating independently with its own sorting and placement logic

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP3920768B1System for loading a dishwasher and dishwasher having a system of this kind
Publication Date: 2025.07.23 ILLINOIS TOOL WORKS INC
  • EP3920768B1 patent drawingFigure 1
  • EP3920768B1 patent drawingFigure 2A~2B
  • EP3920768B1 patent drawingFigure 3A~3B

AI summary

A system (10) for loading a dishwasher which is designed as, in particular, a commercial conveyor dishwasher (1). The system (10) has a feed conveyor belt (11) for feeding washware (9a, 9b, 9c) to a loading region of the conveyor dishwasher (1). The system (10) also has a sorting arrangement for sorting the washware (9a, 9b, 9c), which is fed to the loading region of the conveyor dishwasher (1) by means of the feed conveyor belt (11), in accordance with predefined or predefinable washware groups. At least one loading arrangement (13a, 13b, 13c) is associated with the sorting arrangement for the purpose of automatically loading the conveyor dishwasher (1) with washware (9a, 9b, 9c) of one of the predefined or predefinable washware groups.