Door-Mounted Icemaker Lever Assembly for Secure Ice Access

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Solution Overview

Problem

Conventional refrigerators with icemakers located at the lower part of the main body require users to stoop to access ice, and the freezer compartment has a smaller capacity, which is further reduced when an icemaker is installed, failing to meet user needs.

Innovation Solution

An icemaker case with a rotatable door equipped on the refrigerator door, featuring a lever assembly that rotates perpendicular to the door's opening and closing direction, allowing independent control and sealing of the icemaker space, along with a cool air duct system to maintain temperature and prevent ice melting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the icemaker is disposed in the lower part of the main body to save door space, then the door structure is simplified, but the user must stoop to access ice which reduces ease of operation

Engineering Contradiction:
Improvedoor structureVSAvoidice accessibility
Core Design Contradiction:
Device complexityVSEase of operation

Solution Approach 1:

The icemaker case is moved from the traditional lower interior position to the door surface, utilizing the door's external space. This dimensional relocation allows the icemaker to be accessible at door level while keeping the door structure relatively simple, resolving the contradiction between device complexity and ease of operation.

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

2Reliability

If the icemaker is installed in the freezer compartment, then the icemaker is integrated with the freezing function, but the freezer capacity is further decreased which reduces storage volume

Engineering Contradiction:
Improveicemaker integrationVSAvoidfreezer capacity
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The icemaker case is extracted from the freezer compartment interior and relocated to the door. This extraction frees up freezer space while maintaining the icemaker's integration with the refrigerator system through the cool air duct connection, thus preserving reliability while increasing freezer capacity.

Inventive Principle:
Principle #2Taking out (Extraction)

3Ease of operation

If the icemaker door is made freely openable to facilitate ice access, then ease of operation is improved, but the door may open due to impacts from the refrigeration compartment door which reduces reliability

Engineering Contradiction:
Improvedoor openabilityVSAvoiddoor stability
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The lever assembly provides dynamic control of the icemaker door, allowing it to be easily opened when needed while automatically locking during normal operation. This dynamic mechanism enables the door to transition between locked and unlocked states based on user interaction, resolving the contradiction between ease of operation and reliability.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The lever assembly acts as an intermediary mechanism between the user and the icemaker door. It provides controlled access by requiring deliberate user action (moving the lever) to open the door, while preventing accidental opening from impacts. This intermediary mechanism preserves both ease of intentional operation and reliability against unintended opening.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentUS8966931B2Refrigerator and icemaker with lever assembly
Publication Date: 2015.03.03 LG ELECTRONICS INC
  • US8966931B2 patent drawing
  • US8966931B2 patent drawing
  • US8966931B2 patent drawing

AI summary

A refrigerator is provided. The refrigerator includes: an icemaker case on a door; an icemaker door on the icemaker case, the icemaker door being rotatable; a holding part on the icemaker case; and a lever assembly. The lever assembly is coupled to the icemaker door to be rotatable in order to engage or disengage with the holding part.