Boundary-Layer Pump Housing for Air Mattress Inflation and Deflation
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Solution Overview
Problem
Conventional airbed pumps, such as squirrel-cage blowers and diaphragm pumps, fail to efficiently meet the pressure and flow rate requirements for home-use and medical airbeds, leading to inefficiencies, noise, and increased costs when combined in sophisticated systems.
Innovation Solution
The development of boundary-layer pumps with adjustable components and manifold-driven configurations that allow for efficient inflation, deflation, or simultaneous inflation and deflation of air mattress chambers, utilizing multiple disk arrays and reversible motors to achieve high flow rates and pressures while minimizing noise and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If squirrel-cage blowers are used to inflate airbeds, then high flow rate is achieved, but pressure capability is insufficient
Solution Approach 1:
The patent segments the pumping function into two distinct components: a squirrel-cage blower for high-flow-rate inflation and a diaphragm pump for high-pressure adjustment. This segmentation allows each component to specialize in its optimal performance range, with the blower handling bulk air movement and the diaphragm pump providing precise pressure control up to 1 psi.
Solution Approach 2:
The patent merges two different pump types (squirrel-cage blower and diaphragm pump) into a single integrated system. The manifold chamber combines the outlets of both pumps, allowing them to work together synergistically - the blower provides continuous high-flow air while the diaphragm pump intermittently boosts pressure when needed.
2Stress or pressure
If diaphragm pumps are used to achieve high pressure, then pressure capability is improved, but flow rate is limited
Solution Approach 1:
The patent segments the pumping function into two distinct components: a squirrel-cage blower for high flow rate and a diaphragm pump for high pressure. This segmentation allows each component to specialize in its optimal performance range, with the blower handling bulk air movement and the diaphragm pump providing precise pressure control.
Solution Approach 2:
The squirrel-cage blower performs preliminary action by inflating the airbed quickly to near-target pressure before the diaphragm pump takes over for final pressure adjustment. This preliminary high-flow inflation reduces the total runtime needed for the slower diaphragm pump.
3Productivity
If both diaphragm pump and squirrel-cage blower are integrated, then pressure and flow rate requirements are met, but device complexity and cost increase
Solution Approach 1:
The manifold chamber serves multiple functions: it distributes air from the blower, receives pressure boosts from the diaphragm pump, connects to multiple airbed chambers, and provides mounting for control valves. This multi-functionality reduces the need for separate components and simplifies the overall system architecture.
Solution Approach 2:
The system uses pressure sensors and control algorithms to automatically determine when to switch between or combine the two pumps. The control mechanism monitors airbed pressure and flow requirements, activating only the necessary pump or both pumps simultaneously based on real-time conditions.
4Productivity
If squirrel-cage blowers are used, then inflation speed is high, but noise level increases
Solution Approach 1:
The diaphragm pump operates periodically rather than continuously, activating only when the airbed approaches target pressure. During these intermittent bursts, it provides the necessary pressure boost at lower noise levels, while the quieter pump handles the final adjustment phase.
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
These systems provide efficient, cost-effective, and flexible solutions for airbed pumping, capable of achieving high flow rates and pressures suitable for a range of applications, reducing noise and complexity compared to traditional pump combinations.
Implementation Method 1
boundary-layer pumps having single disk array or multiple disk array layouts
Implementation Method 2
pressure recovery chamber geometries, adjustable components for switching between filling and powered dumping operations
Data Source
AI summary
Efficient systems and methods for inflating, deflating, or simultaneously inflating and deflating air mattress chambers using various pump and pump housing configurations are provided. Examples of the various pump and pump housing configurations include: boundary-layer pumps having single disk array or multiple disk array layouts, different disk geometries, different pressure recovery chamber geometries, adjustable components for switching between filling and powered dumping operations, and reversible and non-reversible motors; and pump housings having one or more dump channels for manifold-driven powered dumping, multiple sides or stages for pressure and/or flow compounding, various manifold chamber configurations for robust connectivity with air mattresses having multiple chambers, and various valve configurations for flexible control over filling, powered dumping, and simultaneous filling and powered dumping operations. Pump products having pumps and pump housings designed according to the principles described herein are able to satisfy a wide range of different performance and cost requirements.