LED Fixture Heat Sink Cross-Member Design
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Solution Overview
Problem
High-luminance LED light fixtures face challenges such as high cost due to complexity, difficulty in protecting electronic LED drivers from water and air exposure, and inadequate heat dissipation, which are exacerbated by the need for large and heavy fixtures with complex structures.
Innovation Solution
The design incorporates a heat sink cross-member for efficient heat transfer between housing portions, aligned fins on the housing surfaces for enhanced heat dissipation, and a compact multi-chip LED module with a reflector and light-transmissive cover for improved protection and illumination, allowing for a simpler and more adaptable LED lighting fixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If complex structures for module mounting and heat dissipation are used, then heat dissipation performance is improved, but device complexity and cost increase
Solution Approach 1:
The mounting structure integrates multiple functions: it secures the LED module to the housing while simultaneously serving as a heat dissipation pathway. The cross-member structure combines mechanical support with thermal conduction, eliminating the need for separate mounting brackets and heat sinks, thereby reducing structural complexity while maintaining effective heat dissipation.
2Reliability
If electronic LED drivers are protected from water and air exposure, then reliability is improved, but device complexity increases
Solution Approach 1:
The housing structure serves multiple purposes: it provides mechanical support for the LED module, conducts heat away from the LEDs, and creates a sealed environment protecting electronic drivers from water and air exposure. This multi-functional design eliminates the need for separate protective enclosures, reducing overall device complexity while ensuring component protection.
3Use of energy by moving object
If large lamp compartment with large reflectors is used, then lighting efficiency is improved, but fixture size and weight increase
Solution Approach 1:
The reflector is integrated into the housing structure rather than being a separate component, and the housing itself is designed to provide structural support. This dimensional integration eliminates the need for additional support structures and reduces overall fixture weight while maintaining the reflector's lighting efficiency function.
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 solution results in a compact, cost-effective, and reliable LED lighting fixture with effective heat dissipation and protection of electronic components, enabling efficient illumination while reducing the overall size and weight of the fixture.
Implementation Method 1
The cross-member is a heat sink which transfers heat from the LED illuminator to at least one of the joined housing portions
Implementation Method 2
the outer surface of the front-housing portion includes a series of fins extending outwardly therefrom facilitating heat dissipation from the LED illuminator
Data Source
Figure 1~2
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AI summary
An LED lighting fixture (10) comprising (a) a front-housing portion (20) having a surrounding lateral wall (21) defining a front cavity (22) and extending to a front-housing forward edge (23) at an open front-end (24), (b) a rear-housing portion (30) having a backwall (31) and a surrounding wall (32) which define a rear cavity (33), the surrounding wall extending to a rear-housing forward edge (34), the rear-housing portion joined to the front-housing portion with the rear-housing surrounding wall substantially in alignment with the front-housing surrounding wall, (c) a cross-member (40) secured with respect to the housing portions in a position at the juncture thereof and spanning the interior of the joined housing portions, the cross-member having a front surface facing the front cavity, and (d) an LED illuminator (11) secured to the front surface (41) of the cross-member.