Sealed Moving Head Projector With Passive Cooling
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Solution Overview
Problem
Existing moving head projectors face challenges in easily exchanging light forming components without disassembly, maintaining a sealed environment to prevent air and dust ingress, and managing heat without active cooling, which affects performance and maintenance.
Innovation Solution
The projector design allows for external exchange of light forming elements during operation, utilizing a cover to switch between modes, enabling maintenance without disassembly and employing natural convection and heat radiation for cooling, maintaining a sealed volume to prevent contamination and eliminating the need for active cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projector is designed as a sealed unit to prevent air and dust ingress, then reliability and component lifespan are improved, but ease of maintenance deteriorates as components cannot be easily accessed or replaced
Solution Approach 1:
The projector housing is divided into a main sealed body and a removable cover assembly. The cover can be detached to provide access to light forming components (gobos, color filters, lenses) while the main housing remains sealed to prevent dust and air ingress. This segmentation allows maintenance without compromising the sealed environment.
Solution Approach 2:
Light forming components are extracted as separate, removable elements that can be accessed through the removable cover. The gobos, color filters, and lenses are designed to be independently replaceable without disassembling the main projector housing, enabling easy maintenance while preserving the sealed environment.
2Temperature
If active cooling means (fans, blowers) are used to manage heat from high power consumption, then temperature control is improved, but noise level and device complexity increase
Solution Approach 1:
The projector employs passive heat dissipation through thermally conductive housing materials and heat sinks that automatically dissipate heat without requiring active cooling components. The aluminum housing and heat sink structures rely on natural convection and radiation to manage thermal loads from the high-power light source.
Solution Approach 2:
Active cooling components (fans, blowers) are completely removed from the system. Heat management is achieved through passive thermal conduction paths and heat sinks integrated into the housing structure, eliminating mechanical cooling systems and their associated noise and complexity.
3Ease of repair
If light forming means are exchanged by disassembling the projector, then ease of replacement is improved, but risk of contamination and assembly errors increases
Solution Approach 1:
The projector is segmented into a sealed main housing and an accessible cover section. Light forming components are located in the cover section which can be independently removed, allowing replacement without opening the main sealed housing. This prevents contamination of internal components while facilitating easy access for maintenance.
Solution Approach 2:
Light forming components (gobos, color filters, lenses) are extracted as independently replaceable elements accessible through the removable cover. This design allows technicians to replace these components without disassembling the main projector housing, eliminating the risk of contaminating internal electronics and optical paths while simplifying the replacement process.
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 enables easy maintenance of light forming components in place, reduces noise by eliminating active cooling, and minimizes pollution inside the projector, extending the lifespan of components and reducing maintenance needs.
Implementation Method 1
The housing for the light source is formed with cooling fins on the outside
Implementation Method 2
Cooling of all optical and electrical components in the moving head projector can take place by means of natural heat convection and heat radiation
Implementation Method 3
Cooling of all optical and electrical components in the moving head projector can take place by means of natural heat convection and heat radiation
Implementation Method 4
WO 2005/095853 relates to a light source module comprising a light source, which light source module comprises cooling means for cooling the light source base, to which yoke the head is rotationally connected, which head comprises a light source placed partly inside reflective means, which reflective means forms a light beam
Implementation Method 5
most of the infrared light, which is radiated in the direction of the dichroic reflector is absorbed in the dishes of the heat sink
Data Source
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AI summary
The present invention relates to moving head projectors comprising a base (4,104), to which base a yoke (6,106) is rotationally connected, which yoke (6,106) is rotationally connected to a head (8,108), which head (8,108) comprises a light source placed partly inside reflective means, which reflective means forms a light beam, which light beam passes through light forming means, which light beam furthermore passes through at least one lens before the light beam leaves the projector. The object of the invention is to achieve a primarily closed moving head projector, where air from the outside is prevented from entering the inner volumes of the projector. Furthermore, the object is to prevent the use of blowing means. Cooling of all optical and electrical components in the moving head projector can take place by means of natural heat convection and heat radiation. Thus, the moving head projector can operate without active cooling means e.g. without blowing means. This automatically leads to a very low projector noise level.