Refrigerator Door-in-Door Storage for Flexible Access and Load Stability

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Solution Overview

Problem

Conventional refrigerators lack efficient storage solutions and user convenience, particularly in terms of accessing and organizing storage compartments, which affects storage efficiency and aesthetic appeal.

Innovation Solution

The design incorporates a first door with a storing device that creates a second storage compartment within the first compartment, accessible via a second door, featuring a frame with baskets that can be easily removed and arranged, and a locking mechanism to maintain stability and unity in the appearance of the doors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a storing device with baskets is coupled to the first door to create a second storage compartment, then storage efficiency and user convenience are improved, but the device complexity and structural load increase

Engineering Contradiction:
Improvestorage efficiencyVSAvoiddevice complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The storing device with frame and baskets is nested within the first door structure, creating a second storage compartment that utilizes the door's internal space. This nesting approach allows the storage system to be integrated into the existing door without requiring separate external structures, thereby improving storage efficiency while controlling complexity.

Inventive Principle:
Principle #7Nested doll (Nesting)

Solution Approach 2:

The first door serves multiple functions: it acts as the primary closure for the refrigerator compartment and simultaneously supports the storing device with baskets to create a second storage compartment. This multi-functionality improves productivity by maximizing the utility of the door structure without proportionally increasing device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Ease of operation

If a second door is connected to the first door to allow independent access to the second storage compartment, then user convenience is improved, but the structural load and potential instability increase

Engineering Contradiction:
Improveuser convenienceVSAvoidstructural stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The door system is segmented into a first door and a second door that are coupled together. The second door is rotatably connected to the first door, allowing independent access to the second storage compartment without opening the first door. This segmentation improves ease of operation by enabling selective access while the coupling mechanism maintains structural reliability through proper load distribution.

Inventive Principle:
Principle #1Segmentation

3Adaptability or versatility

If multiple first coupling parts are provided on the first door for the storing device, then adaptability and ease of arrangement are improved, but the device complexity increases

Engineering Contradiction:
ImproveadaptabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple first coupling parts are provided on the first door at different positions, allowing the storing device to be coupled at various locations according to user needs. These coupling parts use a standardized design that serves multiple functions: structural attachment, adjustable positioning, and load bearing. This universal coupling design improves adaptability while controlling device complexity through design standardization.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS9175902B2Refrigerator including multiple storage compartments
Publication Date: 2015.11.03 LG ELECTRONICS INC
  • US9175902B2 patent drawing
  • US9175902B2 patent drawing
  • US9175902B2 patent drawing

AI summary

A refrigerator includes a cabinet that defines a first storage compartment, a first door that is opened or closed to allow or prevent access to an interior of the first storage compartment, a storing device coupled to the first door to define a second storage compartment, and a second door connected to the first door that is opened or closed to allow or prevent access to an interior of the second storage compartment. The first door includes a plurality of first coupling parts to which the storing device is coupled. The storing device includes a frame and a basket installed on the frame, each including at least one second coupling part interacting with at least one of the plurality of first coupling parts. A front surface of the second door is positioned to be generally coplanar with at least a portion of a front surface of the first door.