Dishwasher Washing Compartment Surface Elements for Rigid Insulated Walls

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Solution Overview

Problem

Existing dishwashers face design limitations in container walls, with stainless steel options being heavy and costly, and plastic options lacking visual appeal, while existing solutions for rigidity and insulation are either costly or aesthetically unsatisfactory.

Innovation Solution

The use of separate surface elements attached to the interior of the washing compartment walls, which can be made of various materials, provides a customizable, aesthetically pleasing, and functional solution for stiffness, insulation, and heat retention, while reducing material costs and noise.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If stainless steel walls are used for the washing compartment, then strength and durability are improved, but weight and material costs increase

Engineering Contradiction:

Improvewall strengthVSAvoidcontainer weight

Core Design Contradiction:

StrengthVSWeight of stationary object

Solution Approach 1:

The wall is segmented into multiple layers: an outer stainless steel layer for strength and durability, and inner surface elements (plastic or metallic) for aesthetic and functional purposes. This segmentation allows each layer to contribute its specific properties without requiring the entire wall to be made of heavy stainless steel.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The wall structure uses composite materials combining stainless steel with plastic or metallic surface elements. This composite construction provides the strength of stainless steel while reducing overall weight and material costs through the use of lighter materials in non-critical areas.

Inventive Principle:

Principle #40Composite materials

2Strength

If stainless steel walls are used for the washing compartment, then strength and durability are improved, but material costs increase

Engineering Contradiction:

Improvewall strengthVSAvoidmaterial cost

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #40Composite materials

3Weight of stationary object

If plastic containers are used for the washing compartment, then weight and material costs are reduced, but visual appearance deteriorates

Engineering Contradiction:

Improvecontainer weightVSAvoidvisual appearance

Core Design Contradiction:

Weight of stationary objectVSShape

Solution Approach 1:

Different materials are used in different locations: plastic is used for the base structure where weight reduction is beneficial, while metallic surface elements are applied in visible areas to provide a high-quality metallic impression and satisfy aesthetic requirements.

Inventive Principle:

Principle #3Local quality

4Ease of manufacture

If single-layer sheet metal walls are used with embossed depressions, then manufacturing simplicity is maintained, but wall rigidity is insufficient

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidwall rigidity

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Inventive Principle:

Principle #40Composite materials

5Shape

If large-area metallic inserts are inserted into the washing compartment, then visual appearance is improved, but design flexibility is reduced

Engineering Contradiction:

Improvevisual appearanceVSAvoiddesign flexibility

Core Design Contradiction:

ShapeVSAdaptability or versatility

Solution Approach 1:

Inventive Principle:

Principle #3Local quality

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 approach enhances the visual appeal, stability, and thermal insulation of the dishwasher, reduces material costs by minimizing the use of expensive stainless steel, and decreases energy consumption by improving heat retention and noise reduction.

Implementation Method 1

at least one of these walls can form part of a movable door, in particular according to the preamble of claim 1

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Implementation Method 2

a completely new optical design of the rinsing tank is achieved, which becomes visible when the door to this is open

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentEP2792290B1Dishwasher with a washing fluid container with one or more surface elements on the inside

Publication Date: 2016.09.07 BSH HAUSGERATE GMBH

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AI summary

A dishwasher (1) with a washing compartment (2), in particular essentially cuboid, which delimits a washing chamber (2a) for accommodating crockery, glasses, cutlery and similar items to be washed, the washing compartment (2) having a floor area (3) and the The washing compartment (2) has walls (4; 5; 6; 7; 8) delimiting it from above and/or from the sides, it being possible for at least one of the walls (7) to form part of a movable door (9), is designed in such a way that at least one of these walls (4;5;6;7;8) is provided on its side facing the washing chamber (2a) with at least one separate surface element (10) fixed to the respective wall (4;5;6;7;8). is, whose front surface (10a) is located parallel or in the plane of the respective wall.