Outlet box system for central vacuum systems
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Solution Overview
Problem
Existing central vacuum systems face challenges in adapting to various wall constructions and thicknesses, limiting the ease of installation and use of retractable hose systems.
Innovation Solution
An outlet box system with a casing assembly, door assembly, and gap-adjustment mechanism that allows for secure mounting on different wall types, combined with a valve assembly module that can be operated between unchoked and choked modes via a simple pulling action, and automatically activates the vacuum source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed outlet box design is used, then the installation process is simple, but it cannot adapt to various wall constructions and thicknesses
Solution Approach 1:
The outlet box incorporates an adjustable positioning mechanism that allows the box to be dynamically repositioned relative to the wall surface. This includes adjustable mounting brackets and depth adjustment features that enable the outlet box to accommodate different wall thicknesses and construction types (drywall, brick, plaster) while maintaining proper alignment and sealing.
Solution Approach 2:
The outlet box is divided into separate modular components including the main box body, mounting brackets, sealing elements, and adjustment mechanisms. This segmentation allows each component to be optimized independently and facilitates easy installation and adaptation to different wall configurations by selecting appropriate combinations of components.
2Ease of operation
If the valve assembly is integrated into the casing assembly, then the system is more compact, but the valve operation becomes less accessible and ergonomic
Solution Approach 1:
The valve assembly is extracted from the interior of the casing and positioned in an accessible location where users can easily reach and operate it. The valve is mounted on the exterior surface of the outlet box or on an extended arm, allowing convenient access for opening and closing without requiring users to reach into confined spaces within the wall cavity.
Solution Approach 2:
An actuating mechanism serves as an intermediary between the valve interior and user interaction. This includes lever arms, push buttons, or rotary handles that translate simple user motions into valve opening/closing actions, making the operation intuitive and ergonomic while keeping the actual valve mechanism compact.
3Productivity
If multiple manual steps are required for operation, then the system provides precise control, but the user manipulation becomes complex and time-consuming
Solution Approach 1:
Multiple functions are merged into single user actions. For example, opening the valve and activating the vacuum pump are combined into one simultaneous action through a dual-function actuator. Similarly, closing the valve and shutting off the pump are linked so that one action completes both functions, reducing the number of separate manipulation steps required.
Solution Approach 2:
The system performs preliminary actions automatically in response to user input. When the user opens the valve, the system automatically activates the vacuum pump and adjusts flow control settings before the user needs to manually intervene. This preliminary automation reduces the complexity and time of manual manipulation while maintaining precise control.
Data Source
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AI summary
An outlet box system (1) for a central vacuum system (3). The outlet box system (1) includes a casing assembly (5) for operatively mounting onto a given support structure (7), the casing assembly (5) having a substantially closed body (9) provided with first and second ports (11,13), the first port (11) being sealingly connectable via piping (15) to the central vacuum system (3), and the second port (13) being configured for allowing a vacuum hose (17) of the central vacuum system (3) to extend therethrough and out from the casing assembly (5). The outlet box system (1) also includes a door assembly (19) operatively mountable onto the casing assembly (5) in a substantially sealed manner, the door assembly (19) being configured for allowing a user to selectively have access to an inside portion (21) of the casing assembly (5). The outlet box system (1) also includes a gap-adjustment assembly (23) for adjusting a distance (25) between the door and casing assemblies (5,19), in accordance with a wall thickness of a finished surface (27) of the support structure (7).