Outdoor Unit Casing Rib Structure Against Opening Buckling
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Solution Overview
Problem
The existing outdoor unit air conditioner casings suffer from buckling deformation near the opening due to compressive loads during stacking, primarily due to low rigidity in the front wall area, which is not adequately addressed by existing reinforcement methods.
Innovation Solution
Incorporating a reinforcement rib with a U-shaped cross-section extending vertically along the side edge of the opening, which increases the compressive strength and shifts the stress concentration area above the opening, thereby reducing the likelihood of buckling deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the front wall is made thinner to reduce material usage, then manufacturing cost decreases, but compression rigidity near the opening decreases causing buckling deformation
Solution Approach 1:
The patent applies local quality by adding reinforcement ribs only in specific areas where compression rigidity is needed (near the opening and along the front wall), rather than uniformly thickening the entire front wall. This allows the front wall to remain thin in non-critical areas while having localized reinforcement where buckling deformation is most likely to occur, thus resolving the contradiction between material reduction and strength maintenance.
2Strength
If reinforcement ribs are added to increase compression rigidity, then buckling deformation is suppressed, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the reinforcement ribs with the front wall structure, making them integral parts of the same component rather than separate attachments. The reinforcement ribs are formed as protrusions from the front wall surface, combining the functions of the front wall and reinforcement elements into a single molded part, thereby reducing assembly steps and structural complexity while maintaining enhanced compression rigidity.
3Ease of manufacture
If the front wall is made narrower near the opening to facilitate assembly, then ease of manufacture improves, but compression rigidity decreases causing buckling deformation
Solution Approach 1:
The patent addresses this contradiction by maintaining the narrowed configuration of the front wall near the opening for ease of assembly, while simultaneously adding local reinforcement ribs in the same region to compensate for the reduced compression rigidity. The reinforcement ribs are strategically positioned to provide structural support exactly where the narrowing occurs, allowing the design to benefit from both the assembly advantages of a narrower front wall and the structural advantages of enhanced rigidity.
Data Source
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AI summary
An air conditioner outdoor unit including a box-shaped casing for accommodating at least a heat exchanger, an air blower, and a compressor. The casing has a front wall with an opening. A reinforcement rib is arranged near the opening of the front wall to increase compressive strength in the vicinity of the opening.