Central vacuum cleaning system
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Solution Overview
Problem
Central vacuum cleaning systems face difficulties in easily connecting and repairing debris pickup nozzles located beneath bottom shelves of cabinets due to limited accessibility, making installation and maintenance time-consuming and challenging.
Innovation Solution
A connection assembly featuring a flexible expandable hose with manually actuated end connectors, allowing for easy installation and repair of debris pickup devices by expanding to reach inaccessible areas and providing a secure, air-tight connection between the nozzle and the vacuum conduit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid tubing is used to connect the inlet nozzle to the vacuum conduit, then the connection is stable and secure, but the installation and repair become difficult and time-consuming due to limited accessibility beneath the bottom shelf
Solution Approach 1:
The connection system is divided into separate segments: a rigid conduit portion and a flexible hose portion with connectors. This segmentation allows the rigid part to provide structural stability while the flexible part with connectors enables easy assembly and disassembly for installation and repair without requiring access to concealed spaces.
Solution Approach 2:
The connection transitions from a static rigid tubing to a dynamic system incorporating flexible hose and manually actuated connectors. This allows the connection to be easily adjusted, installed, and repaired by manual operation of connectors, eliminating the need to work in confined spaces beneath the bottom shelf.
2Ease of operation
If the inlet nozzle is located beneath the bottom shelf of the cabinet, then the debris pickup is effective at floor level, but the connecting conduit becomes inaccessible for installation and repair
Solution Approach 1:
The flexible hose with manually actuated connectors serves as an intermediary between the floor-level inlet nozzle and the vacuum conduit. This intermediary component allows the nozzle to remain positioned for effective debris pickup while enabling easy connection and repair through accessible connectors that can be operated from above the bottom shelf.
3Strength
If rigid tubing is used for the connection, then the structural integrity is maintained, but the installation time and complexity increase due to the need to work in confined spaces
Solution Approach 1:
The connection system is divided into separate segments: a rigid conduit portion that maintains structural integrity and a flexible hose portion with connectors that enables quick assembly. This segmentation allows installation without time-consuming work in confined spaces while preserving the necessary structural strength through the rigid conduit components.
4Shape
If the connection components are concealed beneath the bottom shelf, then the aesthetic appearance is improved, but the repairability and maintenance become extremely difficult
Solution Approach 1:
The connectors and flexible hose connection points are extracted from the concealed space beneath the bottom shelf and positioned in accessible locations. This allows the connection components to remain aesthetically concealed while the connectors themselves are accessible for easy repair and maintenance without requiring disassembly of cabinet structures.
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
Enables straightforward installation and maintenance of floor-level debris pickup devices, reducing the time and effort required for connecting and repairing components, even in confined spaces, while ensuring a reliable and airtight vacuum connection.
Implementation Method 1
a flexible expandable hose with manually actuated end connectors
Implementation Method 2
a vacuum source located remotely from the structure and pneumatically connected to the rear outlet opening of the debris pickup device
Data Source
AI summary
A central vacuum cleaning system having a floor level debris pickup valve preferably mounted in the bottom of a cabinet and connected to a tubular conduit of a vacuum producing unit by a connection assembly. The connection assembly includes a flexible and expandable hose having a pair of end connectors. Each end connector preferably is a bayonet connector. The hose is connected at one end to the rigid tubular conduit of the central vacuum system and the other end connector is pulled through an opening formed in the cabinet by expanding the hose. The expandable hose enables the pickup valve to be attached easily to the other end of the hose, after which the hose is retracted back into a restricted space below the cabinet bottom wall and the pickup valve then attached to the cabinet.