Vacuum Cleaner Dust Chamber Float Valve for Full-Bin Airflow Cutoff
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Solution Overview
Problem
Existing vacuum cleaners for dry dust collection do not effectively restrict the air outlet opening when the dust chamber is full, leading to reduced airflow and inefficient dust collection.
Innovation Solution
A vacuum cleaner design that utilizes a movable body larger than dust particles, which vibrates to 'float' on top of the dust, closing off the air outlet opening when the dust chamber is full, promoting kinematic sorting and restricting airflow, while also employing a valve and vibration means to enhance this process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable valve is used to close the air inlet opening at certain differential pressure, then dust-laden air is prevented from entering when the dust chamber is full, but the device complexity increases and the response may be delayed
Solution Approach 1:
The movable body automatically rises to close the air outlet opening when the dust chamber is full, using the natural vibration and kinematic sorting of dust particles itself as the actuating force, without requiring external sensors, valves, or control mechanisms
Solution Approach 2:
The invention extracts the closure function from a complex valve mechanism and implements it through a simple movable body that passively responds to dust accumulation, taking only the essential closing action while eliminating unnecessary mechanical complexity
2Difficulty of detecting and measuring
If current or torque detection is used to indicate dust chamber fullness, then the full condition is detected, but airflow restriction is not actively enforced and collection efficiency decreases
Solution Approach 1:
The system automatically enforces airflow restriction through the movable body closing the air outlet opening, using the dust accumulation itself as both the signal and the actuating force, eliminating the need for separate detection and control systems
Solution Approach 2:
The movable body provides immediate mechanical feedback by rising in direct response to dust particle accumulation and automatically closing the air outlet opening, creating a self-regulating feedback loop that maintains collection efficiency
3Reliability
If the air inlet opening is closed off early, then dust-laden air is prevented from entering, but the dust chamber capacity is reduced and collection time is shortened
Solution Approach 1:
The movable body dynamically adjusts the air outlet opening closure based on real-time dust accumulation, remaining open during normal operation to maximize collection capacity and closing automatically only when the chamber is full, optimizing both time and reliability
Solution Approach 2:
The movable body is pre-positioned to allow maximum dust chamber capacity utilization, and only activates the closing function when dust particles naturally accumulate to the level requiring restriction, preventing premature closure
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 more efficient dust collection by preventing airflow when the dust chamber is full, allowing for greater dust accumulation before restriction, and effectively separates small particles from air using a dust separator, notifying the user when the chamber needs emptying.
Implementation Method 1
Due to the motor driven fan unit the dust chamber will be vibrated. By vibrating the dust chamber also the dry dust, dirt and the movable body will be vibrated
Implementation Method 2
the relatively large movable body will start 'floating' on the relatively light and small dry dust particles, since the small dry dust particles will fill up the space below the movable body
Implementation Method 3
Very small particles of dry dust which pass the air outlet opening of the dust chamber will be separated from the air by the dust separator
Data Source
Figure 1A~1B
Figure 2~3
Figure 4A~4B
AI summary
A vacuum cleaner (1, 21, 41, 51) for dry dust comprises at least a dust chamber (3, 23, 43, 53) and a fan unit(13, 63), which dust chamber (3, 23, 43, 53) is provided with an air inlet opening (7, 27, 57) and an air outlet opening (8, 28) communicating with the fan unit (13, 63). The dust chamber (3, 23, 43, 53) comprises a movable body (9, 29, 59) for restricting air flow through the dust chamber (3, 23, 43, 53). In use the movable body (9, 29, 59) is located on dry dust collected in the dust chamber (3, 23, 43, 53) due to kinematic sorting between the movable body (9, 29, 59) and the dry dust.