Refrigerator Transparent Display Door Assembly for Cool Air Retention

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Solution Overview

Problem

Conventional refrigerators require opening the door to confirm the storage of food, leading to unnecessary leakage of cool air and increased door opening times, especially when the stored position is unknown.

Innovation Solution

A refrigerator with a selectively transparent door that allows users to see inside without opening, featuring a transparent display assembly with integrated electric modules and a control unit, enabling the door to remain closed while still allowing visualization and screen output.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the door is made transparent to allow viewing inside the refrigerator, then user convenience is improved by enabling food identification without opening the door, but the structural complexity increases due to integration of transparent display assembly and electric modules

Engineering Contradiction:
Improvefood identification convenienceVSAvoiddoor structure complexity
Core Design Contradiction:
Ease of operationVSDevice complexity

Solution Approach 1:

The PCB and electric modules are nested within the door structure, specifically positioned behind the transparent display assembly. The control unit is integrated into the door body, creating a compact nested arrangement that allows viewing functionality without compromising structural integrity or increasing external complexity

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The transparent display assembly, PCB, electric modules, and door structure are merged into a single integrated unit. The display assembly serves both as a viewing window and as a housing for the electronic components, combining multiple functions into one structure

Inventive Principle:
Principle #5Merging (Combining)

2Ease of manufacture

If electric modules and PCB are disposed inside the transparent door, then ease of assembly is improved, but the risk of damage to display and PCBs increases due to exposure to cold and moisture

Engineering Contradiction:
Improveassembly easeVSAvoiddisplay and PCB durability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

The door structure is segmented into distinct functional zones: an insulated compartment housing the PCB and electric modules, and a transparent display assembly that interfaces with the user. This segmentation allows the electronic components to be protected from environmental factors while maintaining assembly simplicity

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Insulation materials are pre-installed around the PCB and electric modules before the transparent display assembly is attached. This beforehand cushioning creates a protective barrier against cold and moisture, preventing damage to sensitive components while allowing easy access during assembly

Inventive Principle:
Principle #11Beforehand cushioning (Prior cushioning)

3Loss of energy

If the door remains closed to prevent cool air leakage, then energy efficiency is improved, but the ability to confirm food storage is worsened requiring door opening

Engineering Contradiction:
Improvecool air leakageVSAvoidfood storage visibility
Core Design Contradiction:
Loss of energyVSLoss of information

Solution Approach 1:

The transparent display assembly utilizes optical properties to enable viewing through the closed door. By controlling the transparency and illumination of the display assembly, users can visually access information about stored food without the door needing to open, preventing cool air leakage while maintaining information accessibility

Inventive Principle:
Principle #32Color changes

Data Source

PatentUS11168937B2Refrigerator
Publication Date: 2021.11.09 LG ELECTRONICS INC
  • US11168937B2 patent drawing
  • US11168937B2 patent drawing
  • US11168937B2 patent drawing

AI summary

Provided is a refrigerator in which a transparent display assembly and electric modules, which are disposed in a door to see through a storage space and output a screen, are easily connected to a control unit provided in a cabinet and guided through a narrow door hinge.