Central Vacuum Bag Assembly With Pressure-Based Debris Sensing

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Solution Overview

Problem

Central vacuum systems face challenges in efficiently collecting and managing debris within inhabitable structures, particularly in terms of debris quantification and bag management, with existing systems lacking effective methods for determining debris quantity and requiring manual handling of bags.

Innovation Solution

A central vacuum system with a collection chamber, a vacuum motor, and a sensor to record pressure data, which calculates debris quantity, combined with a bag mounting assembly that allows for easy bag insertion, operation, and removal, along with a controller to monitor and manage the system's operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If a central vacuum system uses a collection chamber to accumulate debris, then debris collection capacity is improved, but the system lacks effective methods for determining debris quantity

Engineering Contradiction:

Improvedebris collection capacityVSAvoiddebris quantity determination

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent replaces manual visual inspection or mechanical measurement methods with electronic pressure sensing technology. The pressure sensor automatically monitors debris quantity by detecting pressure changes in the collection chamber, substituting mechanical/manual assessment with electronic measurement to resolve the contradiction between collection capacity and measurement precision.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system implements feedback through pressure sensors that continuously monitor the collection chamber and provide real-time data to the controller. This feedback mechanism enables automatic tracking of debris quantity, allowing the system to maintain accurate measurement while preserving large collection capacity through electronic monitoring rather than physical constraints.

Inventive Principle:

Principle #23Feedback

2Device complexity

If a central vacuum system requires manual handling of bags for insertion and removal, then device complexity is reduced, but ease of operation deteriorates

Engineering Contradiction:

Improvebag management mechanismVSAvoidbag insertion and removal

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The patent implements self-service through the cover mechanism that automatically closes and seals the inlet when the bag is removed. The spring-loaded cover and engagement features perform the sealing action automatically without requiring manual intervention, thus maintaining simple device structure while significantly improving ease of operation during bag changes.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system prepares the sealing action in advance by using a spring-loaded cover that is pre-positioned to automatically close when the bag is removed. This preliminary positioning of the cover ensures that the sealing action is already prepared and executes automatically, eliminating the need for manual sealing operations while keeping the mechanism simple.

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If a central vacuum system lacks a cover mechanism on the bag inlet, then device complexity is reduced, but debris leakage during bag removal occurs

Engineering Contradiction:

Improvecover mechanismVSAvoiddebris leakage

Core Design Contradiction:

Device complexityVSObject-generated harmful factors

Solution Approach 1:

The cover mechanism performs self-service by automatically closing and sealing the inlet when the bag is removed through spring-loaded action and engagement features. This automatic sealing prevents debris leakage without requiring manual intervention or complex control systems, thus adding minimal complexity while effectively eliminating the harmful leakage effect.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The spring-loaded cover is pre-positioned and spring-loaded to create preliminary anti-action against potential debris leakage. The spring tension is pre-established to ensure the cover closes automatically when the bag is removed, preventing debris from escaping before the user can react or take additional preventive measures.

Inventive Principle:

Principle #9Preliminary anti-action

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

The system effectively collects and quantifies debris, alerts for bag replacement, and prevents debris leakage during bag removal, enhancing operational efficiency and user convenience.

Implementation Method 1

a vacuum motor supported in the housing and being operable to move debris from the interior portion into the collection chamber

Methodology Applied

Scientific EffectPressure difference: Pressure Gradient

Implementation Method 2

a sensor positioned in the collection chamber and being operable to record pressure data in the collection chamber

Methodology Applied

Scientific EffectPressure measurement:

Data Source

PatentUS7461430B2Vacuum system and method

Publication Date: 2008.12.09 BROAN NUTONE LLC

AI summary

A central vacuum system connectable to an interior portion of an inhabitable structure includes a housing having an upper end, a lower end, and a side wall defining a collection chamber, the side wall defining an opening communicating between atmosphere and the collection chamber, and a vacuum motor supported in the housing and being operable to move debris from the interior portion into the collection chamber.