Removable Air Return Bulkhead Panel for Trailer Unit Access
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Solution Overview
Problem
Conventional air return bulkheads in refrigeration units require complete removal for maintenance, which is time-consuming due to numerous fasteners and mounting brackets, necessitating a solution for quick and easy access to the lower region of the refrigeration unit without disassembling the entire bulkhead.
Innovation Solution
A new air return bulkhead design featuring a first lower main panel fixedly secured to the trailer's front wall and a second upper secondary panel that is removably engaged with the first panel, allowing easy access to the lower region by removing only the upper panel, thus avoiding the need to remove the entire bulkhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the entire air return bulkhead is removed for maintenance, then access to the lower region of the refrigeration unit is achieved, but time and effort are significantly consumed due to numerous fasteners and mounting brackets
Solution Approach 1:
The air return bulkhead is divided into two separate panels: a main lower panel that remains fixed and an upper secondary panel that is removable. This segmentation allows maintenance personnel to access the lower region by removing only the upper panel, avoiding the need to disassemble the entire bulkhead and its numerous fasteners and mounting brackets.
2Ease of operation
If the entire air return bulkhead is removed for maintenance, then access to the lower region of the refrigeration unit is achieved, but structural integrity and temperature control are compromised
Solution Approach 1:
By segmenting the bulkhead into fixed and removable portions, the main lower panel that critical for structural integrity and temperature control remains permanently attached to the front wall member, while only the non-critical upper panel is removed for maintenance access.
Solution Approach 2:
The upper secondary panel is extracted as a separate removable component from the main bulkhead structure. This extracted panel provides the necessary access path to the lower region without requiring removal of the main structural panel that maintains temperature control and structural integrity.
3Strength
If numerous fasteners and mounting brackets are used to secure the bulkhead, then structural integrity is maintained, but ease of maintenance is reduced
Solution Approach 1:
The bulkhead is segmented into a main panel with numerous fasteners for structural integrity and a separate upper panel with minimal fasteners for easy removal. This allows the main structural panel to maintain integrity while the upper panel provides easy maintenance access.
Solution Approach 2:
The upper secondary panel is extracted as a separate maintenance access component with its own simplified fastening system. This extracted panel can be quickly removed and reinstalled without affecting the main bulkhead's structural fasteners and mounting brackets.
Data Source
AI summary
An air return bulkhead for use within refrigerated cargo trailers comprises a pair of substantially coplanar panel members disposed within a vertically oriented plane. A first lower main panel member is fixedly connected to the front wall member of the cargo trailer, and the second upper secondary panel member, in addition to also being connected to the front wall member of the cargo trailer, is also removably connected to the first lower main panel member so as to provide repair or maintenance personnel with easy access to the lower region of the refrigeration unit when, for example, repair or maintenance procedures need to be performed upon the refrigeration unit.