Facade Lamp with Integrated Seal and Heat Sink
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Solution Overview
Problem
Facade lights face challenges in compact design due to heat generation and temperature variations, and must prevent liquid ingress to ensure reliability and longevity, especially when exposed to external weather conditions and humidity.
Innovation Solution
The design incorporates a seal with a protruding cover that surrounds the assembly opening, using adhesive material for both sealing and mechanical fastening, and features a long housing for efficient heat dissipation with a protective circuit to manage temperature, along with optical elements for asymmetrical light emission and protection against liquids.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the luminaire is made compact to meet space constraints, then the volume and dimensions are reduced, but heat dissipation becomes insufficient and temperature control deteriorates
Solution Approach 1:
The luminaire is divided into functionally independent modules: a compact light-generating module containing LEDs and optics, and a separate heat-dissipating structure with fins. This segmentation allows the light-generating portion to remain compact while the heat dissipation system extends the thermal management surface area without increasing the primary luminaire volume.
Solution Approach 2:
Heat dissipation is achieved by extending into the third dimension through vertically arranged fin structures that project from the housing. This dimensional extension provides large surface area for thermal convection and radiation without increasing the horizontal footprint or overall compact dimensions of the luminaire body.
2Volume of moving object
If the luminaire is made compact to meet space constraints, then the volume is reduced, but protection against liquid ingress becomes more difficult to ensure
Solution Approach 1:
A flexible sealing gasket made of elastomeric material is used to create a waterproof barrier between the luminaire and the mounting opening. The gasket deforms to conform to irregularities in the mounting surface, ensuring reliable sealing in the compact design where minimal clearance exists between components.
Solution Approach 2:
The housing combines multiple materials with complementary properties: a rigid outer shell for structural integrity, integrated heat-dissipating fins, and embedded elastomeric sealing elements. This composite construction achieves both compact dimensions and IP65 protection rating by integrating sealing functionality directly into the housing structure.
3Use of energy by moving object
If LEDs are used as light sources, then energy efficiency is improved, but heat generation requires special measures to prevent overheating
Solution Approach 1:
The heat generated by the LEDs, which is a harmful byproduct, is converted into a useful function by integrating it into the heat dissipation system. The fin structures are thermally coupled to the LED mounting area, and the same housing that protects the LEDs also serves as a heat sink, transforming the harmful thermal energy into a controlled thermal management solution.
Solution Approach 2:
A thermally conductive intermediary material is used between the LED mounting substrate and the housing fins to efficiently transfer heat. This intermediary ensures optimal thermal coupling while allowing the LEDs to remain mounted on their circuit board, bridging the gap between the heat-generating component and the heat-dissipating structure.
4Reliability
If a seal is arranged on the projection to prevent liquid ingress, then waterproofing is improved, but the device complexity increases
Solution Approach 1:
The sealing function is merged with the mounting structure by integrating the elastomeric gasket directly into the housing projection that engages with the mounting opening. This combination eliminates the need for separate sealing components and assembly steps, achieving waterproofing through the primary structural element rather than adding auxiliary sealing parts.
Solution Approach 2:
The housing projection serves multiple functions simultaneously: it provides mechanical engagement with the mounting opening for secure attachment, and it supports the sealing gasket to create the waterproof barrier. This multi-functionality reduces overall device complexity by consolidating mounting and sealing operations into a single integrated feature.
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 ensures effective sealing against liquids, efficient heat dissipation, and optimized light distribution, meeting protection class IP65 and providing a compact, reliable facade lighting solution that prevents overheating and moisture ingress.
Implementation Method 1
the seal being formed from an adhesive material
Implementation Method 2
a heat sink which is arranged on the side of the support element facing away from the LEDs
Implementation Method 3
the housing being made possible by a relatively long metal housing or plastic cover... providing a larger surface area for heat dissipation
Implementation Method 4
one or more lens-like optical elements, which, in cross-section, are approximately frustoconical
Implementation Method 5
prism-like structures, ribbing, or similar features
Data Source
Figure 1~4
Figure 5~6
Figure 7~9
AI summary
A lamp (1, 51) for arranging in a façade construction (100) comprises a pot-like housing or a carrier element, in particular a circuit board, having LEDs (5, 55) arranged therein or thereon, an optical unit (15, 65) associated with the LEDs (5, 55), and a transparent cover (20, 70), which together with the housing or the carrier element encloses the LEDs (5, 55), wherein the optical unit (15, 65) is an integral component of the cover (20, 70) and the cover (20, 70) is adhesively bonded to the housing or to the carrier element.