Icemaker Door Gasket Assembly for Air Leakage and Condensation
Solution Overview
Problem
Current icemaker designs for refrigerator appliances face challenges in sealing and insulation, leading to air leakage and condensation issues due to direct conduction pathways and inadequate thermal resistance, which affect the efficiency and functionality of the icemaker.
Innovation Solution
The icemaker design incorporates a plurality of protrusions on the box rim to define channels for gaskets, a sealing gasket around the door center, and an outer gasket with a non-linear contact portion and linear connecting portion to enhance sealing and insulation, reducing air leakage and condensation by positioning gaskets within these channels and using the outer gasket to compress against the liner rim.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a simple door structure is used for the icemaker, then manufacturing cost is reduced, but air leakage and condensation issues occur due to inadequate sealing
Solution Approach 1:
The door sealing system is divided into multiple independent gaskets: an outer gasket positioned at the periphery of the door and an inner gasket positioned at the center portion of the door. Each gasket addresses specific sealing zones, allowing the system to achieve comprehensive sealing without requiring a single complex sealing structure, thus maintaining manufacturing simplicity while improving reliability.
Solution Approach 2:
Gaskets serve as intermediary elements between the door and the icemaker box/liner. The outer gasket interfaces with the liner rim while the inner gasket interfaces with the icemaker box, creating intermediate sealing layers that prevent direct air leakage pathways and condensation formation without requiring direct contact between the door and the cold surfaces.
2Device complexity
If direct contact between the door and box rim is maintained, then structural simplicity is preserved, but thermal conduction causes condensation and reduces thermal resistance
Solution Approach 1:
The direct contact pathway between the door and the cold box rim/liner is extracted and replaced with gasket intermediaries. The outer gasket is positioned between the door periphery and the liner rim, while the inner gasket is positioned between the door center and the icemaker box, removing the direct thermal conduction pathway that causes condensation.
Solution Approach 2:
Gaskets act as thermal insulating intermediaries between the door and the cold surfaces (box rim and liner). These elastomeric or foam-based gaskets have low thermal conductivity, preventing heat transfer from the door to the cold surfaces, thereby eliminating the temperature differential that causes condensation while maintaining structural simplicity.
3Reliability
If multiple gaskets and protrusions are added to enhance sealing, then air leakage and condensation are reduced, but device complexity increases
Solution Approach 1:
The gaskets serve multiple functions simultaneously: they provide sealing to prevent air leakage, provide thermal insulation to prevent condensation, and accommodate manufacturing tolerances through their compressible nature. The outer gasket seals the periphery while the inner gasket seals the center portion, with each component performing multiple roles that would otherwise require separate elements.
Solution Approach 2:
The use of flexible elastomeric or foam-based gaskets allows for simple, thin-profile sealing components that can deform to accommodate surface irregularities and manufacturing tolerances. This flexibility eliminates the need for complex rigid sealing structures with multiple adjustment mechanisms, achieving reliable sealing with minimal components.
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 configuration improves thermal resistance, reduces condensation, and prevents air leakage, ensuring effective sealing and enhanced operational efficiency of the icemaker by maintaining a warmer temperature for the liner rim above the dew point.
Implementation Method 1
A first gasket is positioned within the first channel. A second gasket is positioned within the second channel. An outer gasket is positioned about a periphery of the door.
Implementation Method 2
This configuration improves thermal resistance, reduces condensation, and prevents air leakage, ensuring effective sealing and enhanced operational efficiency of the icemaker by maintaining a warmer temperature for the liner rim above the dew point.
Data Source
AI summary
An icemaker for a refrigerator appliance is provided. The icemaker includes an icemaker box selectively closeable by a door. An outer gasket is positioned about an inner edge of the door. A sealing gasket is positioned around a center portion of the door. A plurality of protrusions extend from a box rim of the icemaker box. A liner is aligned with and spaced apart from the box rim. A first gasket and a second gasket are positioned between the box rim and the liner.