Refrigerator Door Damping Mechanism for Variable-Force Closure Control
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Solution Overview
Problem
Refrigerator doors with increased weight due to additional features like ice makers or enhanced materials face challenges in opening and closing, leading to increased effort, noise, and potential items falling due to impact during closure.
Innovation Solution
A damping mechanism is integrated into the refrigerator door system, providing adjustable damping forces during the closing process to automatically close the door while minimizing impact and preventing micro-opening, and ensuring smooth operation by varying damping forces based on the door's angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the door weight is increased to provide additional features like ice makers or use heavy materials for outer appearance, then the functionality and appearance quality are improved, but the effort required to open and close the door increases
Solution Approach 1:
The patent applies a counterweight mechanism integrated into the hinge assembly that generates an upward force to offset the gravitational force acting on the heavy door. This counterweight system reduces the effort required by users to open and close the door while maintaining the door's substantial weight for functional features like ice makers and dispensers.
2Shape
If the door weight is increased to enhance outer appearance with heavy materials, then the appearance quality is improved, but noise and impact during door closure increase
Solution Approach 1:
The patent incorporates a damping mechanism with a damper that provides controlled resistance during door closure. This damping system absorbs the impact energy before the door fully closes, preventing sudden slamming and reducing noise while protecting the door and cabinet from impact damage.
3Object-affected harmful factors
If a damping mechanism is added to reduce impact during door closure, then the harmful impact is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the damping mechanism with the existing hinge assembly, integrating the damper, counterweight, and hinge components into a unified structure. This combination approach provides impact reduction functionality without adding separate complex mechanisms, as the damping element is incorporated within the hinge's structural framework.
4Ease of operation
If a device providing door closing force is added to automatically close the door, then the ease of operation is improved, but more force is required when opening the door
Solution Approach 1:
The patent employs a spring-loaded mechanism within the hinge assembly that automatically generates closing force. The spring is pre-loaded to exert a continuous force on the door, causing it to self-close after being opened. This self-service mechanism eliminates the need for manual closing effort while the counterweight compensates for the increased opening force requirement.
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
The damping mechanism reduces the effort required to close the door, minimizes noise and item displacement, and prevents sudden opening or closing, ensuring a stable and efficient door-closing process.
Implementation Method 1
a piston configured to move within the space as the cylinder moves and having an orifice through which oil passes
Implementation Method 2
an elastic member providing elastic force to the piston
Data Source
AI summary
A refrigerator includes a cabinet forming a storage space; a door configured to open and close the cabinet; a hinge configured to connect the door and the cabinet and to support the door to be rotatable; and a damping mechanism providing a damping force to the door while the door rotates in a closing direction after opening the door, in which the damping force of the damping mechanism varies during a door closing process.