Vacuum Dust Bin Emptying With Perimeter Suction Dust Capture
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Solution Overview
Problem
Vacuum cleaners often fail to completely remove dirt from the airstream, and the process of emptying the dirt collector can re-entrain separated dirt and release fine dust plumes, causing inconvenience and mess.
Innovation Solution
The design incorporates a dirt collection and separation module with an auxiliary suction nozzle around the perimeter to ingest airborne dust during emptying, an air diverter valve, and rotational dampers on the door hinge to slow its opening, reducing dust plume formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the door is opened quickly to empty debris, then the emptying process is faster, but dust plume is released into the environment
Solution Approach 1:
The auxiliary suction nozzle is activated before the door is opened to create negative pressure in the collection chamber. This preliminary action ensures that when the door opens, dust is immediately drawn into the suction stream rather than escaping into the environment, resolving the contradiction between fast emptying and dust containment
Solution Approach 2:
The auxiliary suction nozzle acts as an intermediary mechanism between the collection chamber and the external environment. It provides a controlled pathway for dust-laden air to be extracted during door opening, preventing uncontrolled dust release while maintaining efficient emptying speed
2Object-generated harmful factors
If the door is opened slowly to reduce dust plume, then dust release is minimized, but the emptying process takes longer
Solution Approach 1:
The system performs preliminary suction activation before door opening, creating a dust-trapping airflow pattern in advance. This eliminates the need for slow door opening, as the dust is already captured by the suction stream regardless of door opening speed
Solution Approach 2:
The mechanical approach of controlling door opening speed to manage dust release is replaced with a pneumatic system. The auxiliary suction nozzle uses air pressure differentials to control dust movement, substituting mechanical speed control with pneumatic flow control for more effective dust containment
3Device complexity
If the primary suction nozzle alone is used, then the structure is simpler, but dust is not completely removed from the airstream and may be re-entrained
Solution Approach 1:
The suction system is segmented into two distinct nozzles with different functions: the primary suction nozzle for normal cleaning operations and the auxiliary suction nozzle for dust capture during emptying. This segmentation allows each component to be optimized for its specific purpose while working together to prevent dust re-entrainment
Solution Approach 2:
The auxiliary suction nozzle serves as an intermediary dust capture mechanism that activates during the emptying process. It intercepts dust particles that might otherwise escape during door opening, providing an additional layer of dust control without interfering with the primary suction function
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
This solution effectively reduces dust plume formation during emptying, improving user safety and cleanliness by ensuring that dust is captured and not redeposited, enhancing the overall efficiency of the vacuum cleaning process.
Implementation Method 1
an auxiliary suction nozzle located adjacent at least a portion of a lower end of the separation module housing and adapted for ingesting debris
Implementation Method 2
Some dirt separators use one or more frusto-conical-shaped separator(s) and others use high-speed rotational motion of the air/dirt to separate the dirt by centrifugal force
Data Source
Figure 1
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AI summary
A dirt collection and separation module (214) can include a suction air flow (A1) around the perimeter of a tank to ingest fine dust that becomes airborne during the emptying process. More specifically, a door (222) can be moveable between a closed position wherein the door (222) at least partially defines a bottom surface to the at least one collection chamber and an opened position where debris can be emptied and an auxiliary suction nozzle (225) located adjacent at least a portion of a lower end of the separation module housing (216) and adapted for ingesting debris.