Refrigerator Scroll Guide Layout for Low-Loss Dual Duct Cooling
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Solution Overview
Problem
Conventional refrigerators experience significant cool air flow loss and reduced fan efficiency due to suboptimal design of the scroll guide, leading to increased power consumption and inefficient cooling distribution between the freezing and refrigerating chambers.
Innovation Solution
The implementation of a scroll guide with multiple guide pipelines that direct cool air in two directions, connected to cool air ducts on both side walls of the chambers, optimizing the curvature and positioning of these pipelines to minimize flow loss and enhance fan efficiency, with a preferred gap between the fan and scroll guide ranging from 4% to 6% of the fan's diameter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single cool air duct is installed at the freezing chamber, then the structure is simple, but the cooling distribution efficiency is poor and fan efficiency is reduced
Solution Approach 1:
The single cool air duct is segmented into multiple ducts (first cool air duct and second cool air duct) positioned at different locations. This segmentation allows cool air to be distributed to different regions of the freezing chamber simultaneously, improving cooling distribution efficiency while maintaining reasonable structural complexity
Solution Approach 2:
The cool air ducts are arranged in different spatial dimensions and orientations within the freezing chamber. By utilizing three-dimensional spatial arrangement, the system achieves comprehensive cooling coverage without requiring excessive duct complexity
2Loss of energy
If the scroll guide is positioned close to the fan, then the guide pipeline length is reduced, but the cool air flow loss increases due to suboptimal design
Solution Approach 1:
The guide pipeline incorporates optimized curved transitions instead of sharp angles, allowing cool air to flow smoothly from the fan to the ducts. The curved design reduces turbulence and flow separation, minimizing energy loss while accommodating necessary pipeline length
Solution Approach 2:
The scroll guide geometry parameters (curvature radius, angle, cross-sectional area) are optimized to match the fan outlet characteristics. By adjusting these parameters, the system achieves minimal flow loss despite the required pipeline length
3Productivity
If multiple cool air ducts are installed at both side walls, then the cooling coverage is improved, but the scroll guide design becomes more complex
Solution Approach 1:
The scroll guide is designed as a multi-functional component that simultaneously guides cool air to multiple ducts positioned at different locations. By integrating multiple guidance functions into a single scroll guide structure, the system achieves comprehensive cooling coverage without proportionally increasing design complexity
Solution Approach 2:
Multiple guide pipelines are merged into a unified scroll guide structure rather than being separate components. This consolidation reduces the overall design complexity while maintaining the capability to supply cool air to multiple ducts across different chambers
4Productivity
If the fan operates at high power, then the cooling capacity is increased, but the power consumption increases
Solution Approach 1:
The scroll guide design converts the potentially harmful effect of high fan power into beneficial high-velocity cool air flow. By optimizing the guide pipeline to efficiently channel this high-velocity flow into the ducts, the system achieves high cooling capacity with reduced power consumption compared to unoptimized designs
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 minimizes cool air flow loss, reduces power consumption, and enhances fan efficiency by ensuring even distribution of cooled air, resulting in improved cooling performance and reduced energy usage.
Implementation Method 1
An evaporator 23 for heat-exchanging the increased temperature cool air thereby generating lowered temperature cool air
Implementation Method 2
The fan 22 is driven by a motor (not shown), and is installed in a scroll guide (not shown) thus to blow cool air to a cool air duct 21
Data Source
AI summary
A refrigerator is provided that includes a fan that blows cool air generated by an evaporator to a freezing chamber or a refrigerating chamber; a scroll guide that discharges cool air discharged from the fan in two directions; a guide pipeline formed at the scroll guide in two directions, that guides cool air discharged from the scroll guide; and a cool air duct connected to the guide pipeline, that supplies cool air to the freezing chamber or the refrigerating chamber. An optimum scroll guide that can be applicable even when a plurality of cool air ducts are implemented is provided, thereby reducing a flow loss of cool air discharged from the fan and decreasing power consumption.