Inflatable Spa Air Chamber Structure for High-Pressure Shape Stability
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Solution Overview
Problem
Inflatable pools and spas made from PVC air chambers lack strength, comfort, and durability due to their flexibility and low rigidity, leading to shape changes under pressure and difficulties in assembly, disassembly, storage, and transportation.
Innovation Solution
Incorporating a porous sheet with a tensioning structure in the air chamber, where the porous sheet is coupled to the walls via attachment sheets, providing additional support and maintaining the shape of the inflatable product under high pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If PVC air chamber material is used for inflatable pools, then flexibility and low cost are achieved, but strength and structural stability deteriorate
Solution Approach 1:
The patent applies composite materials by combining PVC air chamber with a foam core and fabric outer layer. This multi-material construction integrates the flexibility and waterproofing of PVC with the structural strength of foam and fabric, resolving the contradiction between low cost/ease of manufacture and strength.
Solution Approach 2:
The patent implements local quality by adding a foam core specifically in high-stress areas where structural support is needed, while maintaining flexible PVC in areas requiring adaptability. This localized reinforcement addresses strength deficiencies without compromising overall flexibility or significantly increasing cost.
2Ease of manufacture
If PVC air chamber material is used for inflatable pools, then flexibility and low cost are achieved, but shape stability under pressure deteriorates
Solution Approach 1:
The composite structure of PVC outer layer, foam core, and fabric reinforcement creates a hybrid system that maintains flexibility on the outside while providing rigid shape stabilization through the foam core, preventing deformation under pressure.
Solution Approach 2:
The foam core is strategically positioned within the air chamber to provide localized structural support where shape stability is most critical, allowing the inflatable to maintain its intended shape under pressure while retaining flexibility in other areas.
3Ease of operation
If traditional inflatable structures are used, then ease of assembly and disassembly are achieved, but durability and useful life deteriorate
Solution Approach 1:
The durable fabric outer layer combined with foam core and PVC inner layer creates a composite structure that resists wear, tearing, and degradation, significantly extending the product's useful life while maintaining the inflatable nature that allows easy assembly and disassembly.
Solution Approach 2:
The fabric reinforcement is applied to areas subject to highest stress and wear, such as connection points and high-friction zones, enhancing durability locally without compromising the overall flexibility and ease of assembly of the inflatable structure.
4Ease of operation
If inflatable structures are used, then portability and storage convenience are achieved, but structural integrity under high pressure deteriorates
Solution Approach 1:
The multi-layer composite construction combines the portability of inflatable structures with the structural integrity of foam core and fabric reinforcement, enabling the product to be deflated for easy transport while maintaining strength when inflated under high pressure.
Solution Approach 2:
Strategic placement of foam core and fabric reinforcement in high-stress areas provides localized structural strengthening that maintains structural integrity under high pressure, while the overall inflatable design preserves portability and storage convenience.
Data Source
AI summary
An inflatable spa is disclosed having improved strength. A water cavity of the inflatable spa may receive massaging air bubbles and/or jetted water.