TRU Bulkhead with Service Opening and Thermal Barrier
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Solution Overview
Problem
Existing transport refrigeration systems face challenges in optimizing air flow and providing structural support while minimizing energy loss between the condenser and evaporator units, and they lack efficient access and removal mechanisms for components.
Innovation Solution
A bulkhead designed for transport refrigeration units that creates optimal air flow on both sides, provides structural support using sheet molding compound materials, and includes a thermal barrier with polyurethane foam insulation, along with a service opening and removal shelf for easy access and component removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a bulkhead is designed to provide structural support for TRU components, then structural strength is improved, but device complexity increases
Solution Approach 1:
The bulkhead is constructed using composite materials including SMC (sheet molding compound) panels and polyurethane foam insulation layers, providing high structural strength and thermal barrier properties in a single integrated component
Solution Approach 2:
The bulkhead serves multiple functions simultaneously: it provides structural support for TRU components, creates optimal air flow paths, provides thermal barrier between condenser and evaporator units, and includes integrated access doors and service openings for maintenance
2Loss of energy
If a thermal barrier is added between condenser and evaporator units, then energy loss is reduced, but device complexity increases
Solution Approach 1:
A polyurethane foam insulation layer is integrated into the bulkhead structure between the condenser and evaporator units, providing effective thermal barrier properties to reduce energy loss while maintaining a compact design
Solution Approach 2:
The thermal barrier insulation is merged with the bulkhead structure itself, rather than being a separate component, thereby reducing overall device complexity while still providing the necessary thermal isolation
3Ease of operation
If access doors and service openings are added to the bulkhead, then ease of operation is improved, but structural strength decreases
Solution Approach 1:
The bulkhead is segmented to include removable access doors and service openings that allow maintenance personnel to access TRU components from the front side, improving ease of operation while maintaining overall structural integrity through proper framing and support structures
4Productivity
If the bulkhead creates optimal air flow paths, then productivity is improved, but device complexity increases
Solution Approach 1:
The bulkhead surfaces are contoured with specific curves and angles designed to optimize air flow paths from the condenser and evaporator units, improving system productivity while the contours are integrated into the SMC panel design rather than requiring separate components
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 bulkhead enhances air flow efficiency, reduces energy loss by acting as a thermal barrier, and simplifies maintenance by allowing easy access and removal of components, improving overall system performance and operational efficiency.
Implementation Method 1
The insulation layer can be made from two-part polyurethane foam
Implementation Method 2
the outer and inner panels of the bulkhead are made of a sheet molding compound (SMC) material that can include long strands of glass fibers which impart rigidity and strength to the SMC material
Data Source
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AI summary
A bulkhead for a transport refrigeration unit (TRU) is provided. The bulkhead is configured to create optimal air flow on both a front side (e.g. the side where the condenser unit is located) and a rear side (e.g. the side where the evaporator unit is located) of the bulkhead, provide structural support for various components of the TRU, and provide a thermal barrier between the front side and the rear side. Also, the bulkhead is configured to include an access door and a service opening that allows a user to access TRU components located on the rear side of the bulkhead via the front side of the bulkhead. Further, the rear side of the bulkhead is configured to provide a removal support shelf that can be used as a resting surface or a sliding surface for removing components located on the rear side of the bulkhead out of the TRU from the front side of the TRU via the service opening by removing the access door.