Reversible AC Frame Fitting for 360 mm and 400 mm Roof Openings
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Solution Overview
Problem
Manufacturers of air conditioners for recreational vehicles face challenges in adapting installations to different roof opening sizes (360 mm and 400 mm) while minimizing manufacturing complexity and parts numbers.
Innovation Solution
A modular frame system with adjustable locating elements and a telescopic duct size adjuster allows the air conditioner to be fitted into either opening size, with the frame orienting differently depending on the opening size, and includes a ceiling plate and fascia cover for secure installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate frames are manufactured for each opening size (360 mm and 400 mm), then the air conditioner can be precisely fitted to different vehicle configurations, but manufacturing complexity and parts inventory increase
Solution Approach 1:
The frame is designed with locating elements on all four sides that can engage with different opening configurations. The same frame assembly can be installed in either a 360 mm or 400 mm opening by rotating the frame 90 degrees, allowing one frame design to serve multiple functions for different vehicle roof openings.
Solution Approach 2:
The frame incorporates asymmetric locating element arrangements where projections and recesses are positioned at specific locations on different sides. This asymmetric design enables the frame to engage properly with different opening sizes when oriented differently, while maintaining a single unified frame structure rather than requiring separate symmetric designs for each size.
2Ease of manufacture
If the frame is designed with fixed locating elements for one opening size, then manufacturing is simplified, but the air conditioner cannot accommodate different opening sizes
Solution Approach 1:
The frame incorporates locating elements on all four sides that can engage with different opening configurations. The same frame assembly can be installed in either a 360 mm or 400 mm opening by rotating the frame 90 degrees, allowing one frame design to serve multiple functions for different vehicle roof openings.
3Manufacturing precision
If multiple frame designs are produced for different opening sizes, then precise fitting is achieved, but installation time and complexity increase
Solution Approach 1:
The frame is designed with locating elements on all four sides that can engage with different opening configurations. The same frame assembly can be installed in either a 360 mm or 400 mm opening by rotating the frame 90 degrees, allowing one frame design to serve multiple functions for different vehicle roof openings.
Data Source
AI summary
A frame is provided and is adapted to be installed in an opening and between the external unit and the roof or wall and having locating elements on each of a first side and an opposite second side of the frame, the locating elements or projections being configured together to locate the frame in the opening and to locate the frame in the external unit. The locating elements in the frame are positioned so that if the opening is the first type, the frame is adapted to be installed with the first side facing the roof or wall, and if the opening is the second type, the frame is adapted to be installed with the first side facing the external unit.