Refrigerator Ice Maker Layout to Isolate Heater From Cold Air
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Solution Overview
Problem
In bottom-freezer type refrigerators, the heat emitted by the ice maker's heater interacts with cold air, reducing both cooling and ice separation efficiency, and users must bend to access ice cubes frequently.
Innovation Solution
The ice maker design includes a spatially separated heater from the cold air guiding unit, with heat exchange prevention walls and cooling ribs to minimize heat exchange and enhance cooling efficiency, and a manufacturing method that incorporates these features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the heater is positioned close to the cold air guiding unit for compact design, then the device complexity is reduced, but heat exchange between the heater and cold air increases, reducing cooling efficiency and ice separation efficiency
Solution Approach 1:
The ice maker is divided into distinct functional zones: a heating zone with the heater for ice separation and a cooling zone with the cold air guiding unit for ice making. This spatial segmentation allows each zone to operate independently without thermal interference, resolving the contradiction between compact design and thermal efficiency.
Solution Approach 2:
The heater is extracted from the immediate vicinity of the cold air guiding unit and positioned in a separate location within the ice maker assembly. By taking the heating function out of the direct cooling path, the design maintains compact overall structure while preventing harmful heat exchange that would reduce cooling efficiency.
2Productivity
If the heater emits heat for ice separation, then the ice separation efficiency is improved, but the heat exchange with cold air reduces the available cold air for freezing water to ice
Solution Approach 1:
A thermal barrier or insulating structure acts as an intermediary between the heater and the cold air guiding unit. This intermediary prevents direct thermal coupling, allowing the heater to perform its ice separation function while blocking the transmission of heat to the cold air path, thus preserving the temperature availability of cold air for ice making.
3Ease of operation
If the ice maker is placed in the upper refrigeration chamber for easy access, then the ease of operation is improved, but the user must still bend to access ice in bottom-freezer type refrigerators
Solution Approach 1:
The ice dispenser function is extracted from the traditional upper chamber location and repositioned to the lower freezer chamber door or front panel. This extraction allows ice to be accessed at a convenient lower position without requiring the user to bend down into the deep freezer compartment, eliminating the harmful factor of user discomfort while maintaining the benefits of a bottom-freezer configuration.
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 improves ice making efficiency by preventing heat exchange between the heater and cold air, allowing for more efficient ice production and easier access to ice cubes without bending.
Implementation Method 1
The cold air is continuously generated through heat exchanging between air and a refrigerant performed in a refrigeration cycle including a compression-condensation-expansion-evaporation process
Implementation Method 2
The cold air supplied into the refrigerator is evenly transferred to the interior of the refrigerator by convection
Implementation Method 3
water stored in the recesses is frozen into ice
Implementation Method 4
The heater may emit heat to slightly melt the ice, such that the ice can be easily separated from the ice making recesses
Data Source
AI summary
An ice maker of a refrigerator includes a cooling unit for generating cold air; a case mounted in a food storage space, and defining a cooling space for receiving the cold air; an ice making assembly for making ice; and a bucket arranged at one side of the ice making assembly for receiving the ice. The ice making assembly includes an ice tray arranged in the cooling space, the ice tray having an ice making recess formed in an upper surface thereof for making ice; and a cold air guiding unit arranged at a lower side of the ice tray for guiding the cold air to the lower side of the ice tray, and a heater provided at the lower side of the ice tray such that the heater is spatially separated from the cold air guiding unit, and is configured for emitting heat to separate ice from the ice making recess.