Freezer Air Tower Damper for Precise Cold Air Distribution
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Solution Overview
Problem
Refrigerators face challenges in efficiently regulating cold air flow between the freezer and fresh food compartments, leading to potential frost buildup and increased energy consumption, as existing dampers lack precise control over air flow distribution.
Innovation Solution
An air tower with a damper system that divides the cooling air passageway into plenum chambers, allowing for selective control of cold air flow between the compartments by adjusting the cross-sectional area through a sliding mechanism, enabling precise regulation of air flow to prevent frost buildup and optimize energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a damper is arranged within the passageway to selectively allow cooling air to pass into the freezer and fresh food compartments, then air flow distribution can be controlled, but existing dampers lack precise control over air flow distribution leading to frost buildup and increased energy consumption
Solution Approach 1:
The damper is designed with a sliding mechanism that allows continuous adjustment of the air flow aperture between fully closed and fully open positions. This dynamic adjustment capability enables precise control over the amount of cooling air directed to the fresh food compartment, optimizing energy consumption by preventing excessive cold air flow that causes frost buildup while maintaining adequate refrigeration.
2Temperature
If cooling air is directed into the freezer compartment to establish freezer temperature with a portion further directed to the fresh food compartment, then both compartments can be maintained at desired temperatures, but this configuration leads to frost buildup in the freezer compartment
Solution Approach 1:
The air tower is segmented into distinct plenum chambers: a first plenum chamber for directing cooling air to the freezer compartment and a second plenum chamber for directing air to the fresh food compartment. The damper is positioned to selectively control air flow between these segmented chambers, allowing independent optimization of air distribution to each compartment. This segmentation enables precise control to prevent excessive cold air flow to the fresh food compartment that would cause frost buildup in the freezer.
3Adaptability or versatility
If a damper is used to control air flow between compartments, then temperature regulation is possible, but the damper structure lacks precision in regulating the amount of air flow
Solution Approach 1:
The damper incorporates a sliding mechanism that enables continuous dynamic adjustment of the air flow aperture from fully closed to fully open positions. This continuous adjustability provides precise control over the exact amount of cooling air directed to the fresh food compartment, allowing users to precisely regulate air flow based on specific refrigeration needs and achieve optimal temperature regulation without excessive frost buildup.
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 damper system provides instant air flow regulation, preventing frost buildup in the freezer compartment and reducing energy consumption by allowing users to control the amount of cooling air directed to the fresh food compartment, thereby optimizing temperature settings.
Implementation Method 1
The damper divides the passageway into a first plenum chamber in fluid communication with the freezer compartment, a second plenum chamber in fluid communication with the fresh food compartment, and a damper connecting the first plenum chamber to the second plenum chamber. As the damper is being slid downwards, the cross-sectional area between the damper and the interior side walls widens, and more and more cooling air is flowing into the second plenum chamber.
Data Source
AI summary
An air tower adapted to be located within a compartment of a refrigeration appliance comprises a first plenum chamber in fluid communication with a first compartment of the refrigeration appliance, a second plenum chamber in fluid communication with a second compartment of the refrigeration appliance, a damper connecting the first plenum chamber to the second plenum chamber, and a movable part within the damper configured to be moveable between a first position and a second position. When moved to the first position, the movable part is relatively closer to interior side walls to thereby restrict air flow from the first plenum chamber to the second plenum chamber. When moved to the second position, the movable part is relatively further away from the interior side walls to thereby permit more air flow from the first plenum chamber to the second plenum chamber.