Refrigeration and/or freezer device

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Solution Overview

Problem

Existing refrigerators and freezers with mist generators have a bulky design due to the conventional arrangement of outlet openings relative to the sound waves from piezoelectric elements, which limits their compactness and efficiency.

Innovation Solution

The mist generator is designed with outlet openings positioned in front of the sound waves' direction, incorporating concentrators and deflection elements to focus and direct the sound waves or water jets away from the piezoelectric element, allowing for a more compact and efficient fog generation system, with modular components and a removable tank for easy cleaning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If the outlet opening is positioned behind the piezoelectric element in the conventional manner, then the structure is simple, but the device becomes bulky and loses compactness

Engineering Contradiction:
ImprovecompactnessVSAvoidstructural complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The outlet opening is positioned in front of the piezoelectric element rather than behind it, inverting the conventional arrangement. This allows the sound wave direction to be utilized for compact integration while concentrators and deflection elements manage the acoustic flow appropriately

Inventive Principle:
Principle #13The other way round (Inversion)

Solution Approach 2:

The mist generator is divided into modular components including a separable tank, lid, and receptacle. This segmentation allows for compact overall design while enabling easy maintenance and cleaning of individual components without disassembling the entire device

Inventive Principle:
Principle #1Segmentation

2Volume of moving object

If the mist generator protrudes beyond the separating plate, then the outlet opening can be positioned conventionally, but the overall structure becomes bulky

Engineering Contradiction:
ImprovecompactnessVSAvoidmaintenance accessibility
Core Design Contradiction:
Volume of moving objectVSEase of operation

Solution Approach 1:

The tank is designed as a removable component from the receptacle, allowing users to easily access and clean the water reservoir without requiring the entire mist generator to be accessible or protruding from the separating plate

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The outlet openings are positioned at the front of the piezoelectric element rather than extending backward, allowing the mist generator to remain flush with or integrated into the separating plate while still providing effective mist distribution through alternative outlet positioning

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

3Volume of moving object

If concentrators and deflection elements are added to redirect sound waves, then compactness is improved, but the device complexity increases

Engineering Contradiction:
ImprovecompactnessVSAvoidcomponent complexity
Core Design Contradiction:
Volume of moving objectVSDevice complexity

Solution Approach 1:

The concentrator and deflection elements are integrated into the existing mist generator housing and tank structure rather than being separate add-on components. This merging approach achieves the desired sound wave redirection for compactness while minimizing the increase in perceived device complexity

Inventive Principle:
Principle #5Merging (Combining)

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 enhances the compactness and operational efficiency of refrigerators and freezers by ensuring the mist generator does not protrude beyond the separating plate, maintaining a sleek structure while ensuring effective fog distribution and easy maintenance.

Implementation Method 1

the piezoelectric element P generates sound waves

Methodology Applied
Scientific EffectPiezoelectric effect: Piezoelectric Effect

Implementation Method 2

the sound waves generated by the piezoelectric element P impinge on the water K

Methodology Applied
Scientific EffectAcoustic cavitation: Acoustic Cavitation

Implementation Method 3

one or more concentrators K, which have the task of concentrating the sound waves or water jets emanating from the at least one piezoelectric element P on a point or on an area

Methodology Applied
Scientific EffectAcoustic focusing: Focusing

Implementation Method 4

the deflection element 90, which according to FIG. 4 can represent an integral part of the lid 30. From there the mist is directed into the nebulization chamber V

Methodology Applied
Scientific EffectAcoustic reflection: Reflection

Data Source

PatentEP3228965B1Refrigeration and/or freezer device
Publication Date: 2023.11.15 LIEBHERR HAUSGERATE OCHSENHAUSEN GMBH
  • EP3228965B1 patent drawingFigure 1~2c
  • EP3228965B1 patent drawingFigure 3~5
  • EP3228965B1 patent drawingFigure 6~8

AI summary

The present invention relates to a refrigerator and/or freezer with at least one body and with at least one refrigerated interior surrounded by the body, with at least one smoke generator being arranged in the cooled interior, with the smoke generator having at least one piezoelectric element, with the smoke generator having a or has a plurality of outlet openings through which the mist generated exits the mist generator, the at least one outlet opening being in the direction of the sound waves emanating from the piezoelectric element.