Refrigerator Ice Dispenser Flapper Door for Jam-Free Ice Flow
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Solution Overview
Problem
Existing ice dispensers in domestic refrigerators often face issues with ice jamming and inefficient dispensing mechanisms, leading to user inconvenience and potential contamination from ambient air entering the refrigerated compartment.
Innovation Solution
The ice dispenser incorporates a flapper door mechanism with a rotary damper and linkage system, allowing controlled movement between open and closed positions, along with a torsional spring for biasing, to manage ice flow and prevent jamming, while a motor and chute system facilitate efficient ice dispensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flapper door mechanism is added to control ice flow, then ice jamming is reduced, but device complexity increases
Solution Approach 1:
The flapper door is designed as a dynamic component that automatically pivots between open and closed positions based on ice flow conditions. The door rotates on a pivot pin and responds to forces from the ice auger and spring mechanism, allowing adaptive control without complex electronic sensors or actuators.
Solution Approach 2:
The flapper door acts as an intermediary element between the ice storage chamber and the dispensing chute. It mediates ice flow by selectively blocking or permitting passage, translating the rotational motion from the ice auger into controlled dispensing action while preventing direct contact between the auger and external environment.
2Reliability
If a rotary damper is coupled to the flapper door, then ice jamming is reduced through controlled movement, but device complexity increases
Solution Approach 1:
The rotary damper provides dynamic resistance to the flapper door's motion, creating a controlled damping effect that prevents sudden slamming or rapid oscillations. This allows the door to smoothly transition between positions while maintaining reliability under varying ice flow conditions.
Solution Approach 2:
The rotary damper pre-configures the mechanical system to absorb and dissipate energy from sudden ice flow variations. By providing inherent damping capacity built into the flapper door assembly, the system prepares for potential jamming conditions before they occur, smoothing out pressure fluctuations.
3Object-affected harmful factors
If the flapper door is biased closed by a spring, then ambient air contamination is prevented, but ice dispensing speed may be reduced
Solution Approach 1:
The spring mechanism applies a preliminary closing force to the flapper door, proactively preventing ambient air from entering the ice storage chamber. This anti-action counterbalances the opening force from the ice auger, ensuring the door remains closed unless actively opened by sufficient ice flow pressure.
Solution Approach 2:
The spring bias creates a dynamic equilibrium where the flapper door position adjusts based on the balance between spring closing force and ice auger opening force. During active dispensing, the augmented force from the motor-driven auger overcomes the spring bias to open the door, while during idle periods the spring maintains the closed position.
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 ice dispensing efficiency, reduces jamming, and maintains compartment integrity by ensuring ice is dispensed correctly and ambient air is excluded, improving user experience and appliance performance.
Implementation Method 1
the rotary damper is configured to resist the movement of the flapper door from the open position to the closed position
Implementation Method 2
The ice dispenser may further include a first torsional spring configured to bias the lever in the first lever position
Implementation Method 3
a second torsional spring configured to bias the flapper door in the closed position
Data Source
AI summary
An ice dispenser for a domestic refrigerator includes a lever having a housing with a passageway defined therein and a flapper door configured to pivot between a closed position in which ice is prevented from advancing into the passageway and an open position in which ice is permitted to advance into the passageway. A linkage is coupled to the lever and the flapper door such that movement of the lever causes the flapper door to move from the closed position to the open position.