Movable Vacuum Nozzle Opening for Oscillating Dust Removal
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Solution Overview
Problem
Existing vacuum cleaning devices, such as those described in U.S. Pat. No. 7,383,607, are ineffective in freeing dust from within carpets and making it airborne, as they rely solely on vibration which is not sufficient to dislodge dust from deep within carpet fibers.
Innovation Solution
A vacuum cleaning device with a unit that includes a housing with a movable surface and actuating means to create oscillating airflow, where the position of an opening in the housing wall can be varied to optimize airflow direction during oscillation, allowing for effective dust pick-up and prevention of dust re-deposition, utilizing a synthetic jet mechanism to enhance dust removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a movable surface is used to generate oscillating airflow for dust removal, then dust dislodging capability is improved, but dust re-deposition occurs due to uncontrolled airflow direction
Solution Approach 1:
The housing wall portion containing the opening is made movable rather than fixed, allowing the opening position to dynamically adjust during operation. This enables the system to optimize airflow direction in real-time, directing air toward the surface during intake phase and away from the surface during outflow phase, thereby preventing dust re-deposition while maintaining effective dust removal
Solution Approach 2:
The system employs periodic oscillating airflow through the movable surface, creating alternating intake and outflow phases. This periodic action is synchronized with the periodic movement of the housing wall opening, ensuring that during each outflow phase the opening directs air away from the surface, thus preventing dust re-deposition while maintaining continuous dust dislodging effectiveness
2Device complexity
If the opening position is fixed in the housing wall, then device structure is simplified, but airflow cannot be optimized for different operational phases
Solution Approach 1:
The housing wall portion is designed with movable characteristics, transforming the static structure into a dynamic one. This allows the opening to change its position or orientation during operation, enabling optimization of airflow direction for both intake and outflow phases without significantly complicating the overall device structure
Solution Approach 2:
The movable housing wall portion serves multiple functions: it maintains structural integrity of the housing while enabling dynamic airflow control. This single component achieves both structural support and airflow optimization, reducing the need for additional separate control mechanisms
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 device achieves more effective dust removal by creating a directed airflow that dislodges dust from surfaces and prevents re-deposition, improving the efficiency of dust collection while minimizing the need for traditional suction airflow.
Implementation Method 1
means for actuating the movable surface, which are adapted to realize an oscillating movement of the surface that causes air to alternately be drawn into the housing through the opening, and expelled from the housing through the opening
Implementation Method 2
it is possible to continuously switch the position of the opening between a position in which it is directed towards the surface to be cleaned and a position in which it is directed away from the surface
Implementation Method 3
a unit for aerodynamically affecting dust particles and/or a surface to be cleaned in order for the particles to become dislodged from the surface and to be received by the unit
Data Source
AI summary
A vacuum cleaning device comprises a unit (1) for aerodynamically affecting dust particles and/or a surface (40) to be cleaned in order for the particles to become dislodged from the surface (40) and to be received by the unit (1). The unit (1) comprises a housing (10) having an internal space (11) enclosed by a housing wall (12) in which at least one opening (13) is arranged, a movable surface (30) which is integrated in the housing wall (12), and means (31) for actuating the movable surface (30), which are adapted to realize an oscillating movement of the surface (30) that causes air to alternately be drawn into the housing (10) through the opening (13) and expelled from the housing (10) through the opening (13). At least a portion of the housing wall (12), particularly a portion of the housing wall (12) in which the opening (13) is located, is movably arranged in the unit (1).