Domestic dishwasher
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Solution Overview
Problem
Household dishwashers face limitations in design flexibility and maintenance requirements due to separate components and complex assembly processes, particularly in fluid permeability and self-cleaning features.
Innovation Solution
A household dishwasher with a dishwasher cavity and a functional region processed using laser methods, allowing for adaptable design and integration of a filter system with variable perforations and self-cleaning surfaces, eliminating the need for separate parts and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate components are used for filter system and dishwasher cavity, then assembly and maintenance are simplified, but design flexibility and fluid permeability are reduced
Solution Approach 1:
The patent merges the filter system with the dishwasher cavity by integrating the functional region directly into the cavity structure. The base of the dishwasher cavity incorporates a filter area with laser-perforated openings, eliminating the need for separate filter components and reducing assembly complexity while maintaining design flexibility.
Solution Approach 2:
The base of the dishwasher cavity serves multiple functions: it acts as both the structural support element and the filter system. The functional region with variable perforations enables fluid permeability while the base simultaneously provides structural integrity, combining filtration, support, and fluid management in a single component.
2Adaptability or versatility
If complex assembly processes are used to integrate functional regions, then design flexibility is improved, but manufacturing complexity and time increase
Solution Approach 1:
The patent replaces complex mechanical assembly processes with laser processing technology. The functional region is created by laser-perforating the base material directly, allowing for variable opening sizes and complex geometries to be manufactured in a single processing step rather than through multiple assembly operations.
Solution Approach 2:
The laser processing method enables precise control of opening parameters (size, shape, distribution) by adjusting laser parameters such as power, speed, and pattern. This allows the functional region to be adapted to different application cases by changing processing parameters rather than redesigning the entire component.
3Ease of manufacture
If uniform perforation sizes are used in the filter area, then manufacturing is simplified, but self-cleaning capability and filtration efficiency are reduced
Solution Approach 1:
The patent implements local quality by varying the opening sizes within the filter area based on local requirements. The laser processing creates a gradient of opening sizes where larger openings are positioned to facilitate self-cleaning and debris removal, while smaller openings provide fine filtration, optimizing both cleaning capability and filtration efficiency in different regions.
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
The solution enhances design flexibility, achieves self-cleaning and maintenance-free operation by integrating functional regions with size gradients and hydrophobic surfaces, reducing assembly complexity and eliminating the need for additional parts.
Implementation Method 1
a functional region which is embodied in one piece with the dishwasher cavity and is processed with the aid of a laser processing method
Implementation Method 2
The functional region in particular may be part of a filter system of the household dishwasher
Data Source
AI summary
A household dishwasher includes a dishwasher cavity, and a functional region embodied in one piece with the dishwasher cavity and processed by a laser processing method.