Vacuum Cleaner Rotating Brush Control to Reduce Stationary Floor Wear
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Solution Overview
Problem
Vacuum cleaners with rotating brushes consume unnecessary energy when stationary on a surface, particularly on soft floors, leading to battery discharge and wear on delicate surfaces.
Innovation Solution
Incorporating an electronic control unit that measures the intensity of the electric current to the brush drive motor to detect when the suction head is stationary, allowing for reduction of suction power and rotation speed, thereby minimizing friction and protecting soft floors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotating brush is kept in contact with the floor during stationary operation, then cleaning readiness is maintained, but electrical energy is unnecessarily consumed and soft floors are worn
Solution Approach 1:
The brush drive mechanism is designed to dynamically adjust between rotation and stationary states based on operational conditions. The electronic control unit monitors operational parameters and automatically transitions the brush between rotating and stationary configurations, optimizing energy consumption while maintaining cleaning readiness when needed.
Solution Approach 2:
The rotating brush is extracted from continuous contact with the floor during stationary operation. The suction head can be elevated or the brush retracted from the floor surface, separating the cleaning function from the support function when the vacuum cleaner is not actively cleaning, thereby eliminating unnecessary friction and energy consumption.
2Reliability
If the rotating brush remains in contact with the floor during stationary operation, then the vacuum cleaner is ready for immediate cleaning, but the soft floor undergoes wear and degradation
Solution Approach 1:
The system dynamically adjusts the brush contact with the floor based on operational state. During stationary operation, the brush is positioned away from the floor to prevent wear. When cleaning operation resumes, the brush automatically returns to contact with the floor, ensuring both floor protection and cleaning readiness.
Solution Approach 2:
The electronic control unit anticipates potential floor wear by proactively adjusting the brush position before significant degradation occurs. By monitoring operational parameters and predicting when stationary operation will cause harm, the system preemptively reduces brush contact or lifts the suction head, preventing floor damage before it happens.
3Productivity
If the suction power is maintained at high level during stationary operation, then cleaning performance is optimized, but battery life is reduced
Solution Approach 1:
The suction motor operates dynamically with variable power levels based on operational state. During stationary operation, the motor reduces power consumption to extend battery life. When movement and cleaning operation resume, the motor automatically increases power output to optimize cleaning performance, achieving both energy efficiency and high productivity when needed.
Solution Approach 2:
The system changes operational parameters (suction power, brush rotation speed) based on detected operational conditions. The electronic control unit adjusts motor power settings, airflow levels, and brush speed according to whether the vacuum is moving or stationary, optimizing the balance between cleaning performance and battery consumption through parameter adaptation.
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
Optimizes electrical consumption and protects soft floors by reducing friction and wear when the vacuum cleaner is stationary, enhancing overall cleaning performance and battery life.
Implementation Method 1
a suction motor (16) configured to generate an airflow through the suction inlet and into the suction head
Implementation Method 2
the friction caused by the rotating brush in contact with the floor unnecessarily consumes electrical energy
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The vacuum cleaner includes a suction head (6) comprising a rotating brush (28) movable in rotation about an axis of rotation (A); a rotating drive mechanism (29) configured to drive the rotating brush (28) in rotation about the axis of rotation (A), the rotating drive mechanism (29) comprising a brush drive motor (31) rotationally coupled to the rotating brush (28); a suction motor configured to generate an airflow through the suction mouth (26) and into the suction head (6); and an electronic control unit configured to detect when the suction head (6) is stationary on a soft floor and to modify at least one operating parameter of the vacuum cleaner when the electronic control unit detects that the suction head (6) is stationary on a soft floor.