Magnetic LED Shelf Light Assembly With Low Heat Transfer
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Solution Overview
Problem
Conventional refrigerated merchandisers face challenges with space constraints due to large fluorescent light sources, reduced light output in cold environments, and heat issues from high-current LED sources, along with complex and inefficient light source replacement processes.
Innovation Solution
A magnetic light assembly with a non-conductive magnet housing and low-current LED light sources that can be easily attached to the merchandiser case structure using a magnet-based attachment mechanism, minimizing heat transfer and electrical conductance, and allowing for quick repositioning and replacement without additional fasteners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If fluorescent light sources are used to illuminate the product display area, then the light output is sufficient, but the space available for displaying food product is reduced due to the large size of the light sources
Solution Approach 1:
The patent replaces traditional mechanical mounting systems (fluorescent light fixtures requiring canopy installation) with a magnetic attachment system. The magnetic light assembly uses magnets to attach directly to the metal canopy without requiring additional holes or complex mounting hardware, thereby reducing the space needed for light source installation while maintaining sufficient illumination.
2Use of energy by moving object
If high-current LED light sources are used to reduce energy consumption, then energy efficiency is improved, but heat is generated that adversely affects the temperature of the food product
Solution Approach 1:
The patent introduces a non-conductive housing as an intermediary between the LED light source and the food product. This housing serves multiple functions: it provides thermal insulation to reduce heat transfer to the food, acts as an electrical insulator, and maintains the magnetic attachment mechanism. This intermediary structure allows the use of energy-efficient LED lighting while protecting the food product from excessive heat.
3Reliability
If fluorescent light sources are replaced in existing merchandisers, then newer lighting technology can be implemented, but the replacement process is complex and time-consuming due to modifications needed in the canopy and shelves
Solution Approach 1:
The patent segments the lighting system into a modular magnetic light assembly that can be independently attached and removed. This segmentation allows the light source to be replaced without modifying the existing canopy or shelf structure. The magnetic attachment mechanism enables quick installation and removal by simply attaching the assembly to the metal canopy, eliminating the time-consuming process of drilling holes and installing complex mounting hardware.
4Reliability
If fluorescent light sources are used in cold temperature environments, then the light source can operate, but the light output is reduced compared to warmer environments
Solution Approach 1:
The patent changes the lighting technology parameter from fluorescent to LED, which has different operational characteristics. LED light sources maintain their light output more effectively in cold temperature environments compared to fluorescent lights. Additionally, the magnetic attachment system allows for optimal positioning of the LED modules to maximize illumination efficiency in the refrigerated environment.
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 solution provides efficient illumination with low power consumption, reduces heat impact on products, and simplifies light source replacement, offering energy savings and improved visibility in product displays while maintaining a compact design.
Implementation Method 1
The attachment mechanism is coupled to the light housing opposite the light source to attach the light assembly to the case structure
Implementation Method 2
These LED light sources generally operate at a relatively high current (e.g., 300 mA), which produces a substantial amount of heat that can adversely affect the temperature of the food product in the product display area
Data Source
AI summary
A merchandiser including a case defining a product display area and having case structure. The merchandiser also includes a light assembly. The light assembly has a light housing and a light source coupled to the light housing to direct light generally toward the product display area. The merchandiser further includes an attachment mechanism having a magnet housing and a magnet substantially enclosed by the magnet housing. The attachment mechanism is coupled to the light housing opposite the light source to attach the light assembly to the case structure.