Pleated Vent Shade Assembly for RV Light Control
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Solution Overview
Problem
Recreational vehicle ceiling vents lack effective light control and insulation, posing issues for occupants seeking darker environments and temperature regulation.
Innovation Solution
A movable pleated shade assembly supported by parallel shade strings and opposing string guides, which can be retrofitted to existing ceiling vents, providing light occlusion and enhanced insulative properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ceiling vents are opened to allow light and air into the recreational vehicle, then illumination and ventilation are improved, but unwanted illumination and heat loss occur during sleeping or extreme temperatures
Solution Approach 1:
The vent assembly is divided into separate functional components: a fixed outer frame, a movable inner frame with dome, and an independent pleated shade element. This segmentation allows the shade to be controlled independently from the vent opening mechanism, enabling light control without compromising ventilation functionality.
Solution Approach 2:
The pleated shade element is designed to be movable between extended and retracted positions through string guides and tensioning mechanisms. This dynamic configuration allows the shade to adapt to different usage scenarios - extended for light blocking during sleeping, retracted for maximum light and ventilation during daytime activities.
2Illumination intensity
If a fixed shade is installed in the ceiling vent, then light control is improved, but ventilation capability is reduced
Solution Approach 1:
The shade element is designed with mobility through string guides and tensioning members, allowing it to be dynamically positioned. When retracted, the shade provides minimal resistance to airflow, maintaining full ventilation capability. When extended, it provides light control. This dynamic design resolves the contradiction between light control and ventilation.
Solution Approach 2:
The pleated shade element acts as an intermediary between the vent opening and the interior space. It can be positioned to allow airflow while blocking light, or fully retracted to maximize both ventilation and light entry, providing flexible control over the trade-off between these two functions.
3Object-affected harmful factors
If a complex shade mechanism is added to the ceiling vent, then light control and insulation are improved, but device complexity increases
Solution Approach 1:
The pleated shade element serves multiple functions simultaneously: it blocks light when extended, provides thermal insulation by creating an air gap, and can be controlled through simple string tensioning. This multi-functionality reduces the need for separate mechanisms for each function, thereby limiting the increase in overall device complexity.
Solution Approach 2:
The shade mechanism uses simple string guides and tensioning members that allow the user to control the shade position through direct manual operation. The pleated structure itself provides the blocking and insulating functions without requiring additional active components, motors, or complex control systems, keeping the mechanism simple and reliable.
Data Source
AI summary
A vent shade assembly for a recreational vehicle ceiling vent comprises a vent shade outer frame having an outer perimeter and an inner perimeter defining a first opening coincident with the recreational vehicle ceiling vent. A pair of shade strings are disposed on opposing sides of the vent shade outer frame and proximate the inner perimeter of the vent shade outer frame. A movable pleated shade element having a deployed shape substantially conforming to the inner perimeter of the vent shade outer frame is operable between a closed position substantially occluding the first opening of the vent shade outer frame and an open position, and the one of the pair of shade strings supports one of a pair of opposing side edges of the movable pleated shade element as the movable pleated shade element is operated between the closed position and the open position.