Container refrigeration apparatus
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Solution Overview
Problem
Existing container refrigeration apparatuses face challenges in withstanding external forces and preventing torsional deformation due to their design, which often relies on fiber-reinforced plastics and separate side plate extension parts that do not provide sufficient strength.
Innovation Solution
The design incorporates column members and continuous side plates on both the external and internal casings, which are fixed together to enhance strength and reduce torsional deformation, using metal materials for the casings and resin intermediate members to prevent heat transfer and distribute loads effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate side plate extension parts are used in the casing design, then manufacturing ease is improved, but the strength and torsional resistance of the casing deteriorates
Solution Approach 1:
The patent merges the side plates and side plate extension parts into a single integrated continuous side plate structure. This continuous side plate extends from the upper end to the lower end of the casing, eliminating the need for separate extension parts and providing enhanced torsional resistance and strength while maintaining manufacturing feasibility through integrated forming processes.
Solution Approach 2:
The patent employs composite material construction for the casing, using fiber-reinforced plastics that combine multiple materials to achieve both high strength and torsional resistance. This composite approach allows the casing to withstand external forces while maintaining ease of manufacture through molded construction.
2Strength
If metal materials are used for casings to increase strength, then strength against external forces is improved, but thermal insulation performance deteriorates
Solution Approach 1:
The patent uses fiber-reinforced plastic composite materials for the casing construction. These composite materials provide high strength and rigidity to withstand external forces during container handling and transportation, while simultaneously offering thermal insulation properties to maintain refrigeration efficiency, thus resolving the contradiction between strength and thermal insulation.
3Stability of the object's composition
If continuous side plates are used from upper end to lower end, then torsional deformation is reduced, but device complexity increases
Solution Approach 1:
The patent combines the side plates and side plate extension parts into a single continuous side plate structure that extends from the upper end to the lower end of the casing. This integration provides enhanced torsional resistance and structural stability while avoiding the complexity of assembling multiple separate parts, as the continuous structure can be manufactured as a single integrated component.
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 configuration increases the strength of the casing against external forces, reduces torsional deformation, and maintains thermal insulation while being cost-effective by using metal materials and resin intermediate members with low thermal conductivity.
Implementation Method 1
resin intermediate members to prevent heat transfer and distribute loads effectively
Data Source
AI summary
Left and right edge portions of an external casing of a container refrigeration apparatus each include a column member that is continuous from the upper end to the lower end of a casing. Left and right edge portions of an internal casing each include a side plate that is continuous from the upper end to the lower end of the casing. The column members of the external casing and the associated side plates of the internal casing are fixed together, thereby increasing the strength of the casing including the external casing and the internal casing.