Vacuum Cleaner Motor Load Sensing for Adaptive Suction Control
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Solution Overview
Problem
Vacuum cleaners face challenges in controlling motor operations adaptively to varying loads when cleaning different surfaces, leading to inefficient suction and potential motor damage due to inconsistent current supply.
Innovation Solution
Incorporating a sensor to monitor the load applied to the motor and a processor that adjusts the speed of both the motor rotating the drum and the suction motor based on sensed load thresholds, allowing for adaptive control to reduce energy consumption and prevent motor overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the motor speed is increased to improve cleaning efficiency, then productivity is improved, but the load on the motor increases causing potential damage and reduced reliability
Solution Approach 1:
The patent implements dynamic speed control of the motor based on real-time load detection. The processor continuously monitors motor current and adjusts the motor speed accordingly - reducing speed when load exceeds thresholds and restoring speed when load decreases, thereby maintaining both high productivity during normal operation and motor reliability under heavy load conditions
Solution Approach 2:
The system employs feedback control by sensing the load applied to the motor through current detection and using this information to adjust motor operation. The processor receives feedback about motor current levels and automatically adjusts speed to prevent overload while maintaining cleaning efficiency, resolving the contradiction between productivity and reliability
2Power
If the motor operates at high speed continuously to maintain suction power, then cleaning performance is maintained, but energy consumption increases
Solution Approach 1:
The patent implements periodic speed adjustment based on detected load conditions. Instead of continuous high-speed operation, the motor speed is periodically adjusted according to actual cleaning needs and load levels, reducing energy consumption while maintaining sufficient suction power when required
Solution Approach 2:
The system dynamically changes the motor operating parameters (speed) based on detected load conditions and cleaning requirements. By adjusting speed rather than maintaining constant high power, the system optimizes energy consumption while preserving cleaning effectiveness when needed
3Reliability
If a sensor and processor are added to enable adaptive motor control, then reliability and energy efficiency are improved, but device complexity increases
Solution Approach 1:
The system implements self-service control where the processor automatically monitors motor load and adjusts speed without user intervention. The adaptive control operates autonomously based on pre-set thresholds, improving reliability and energy efficiency while adding minimal complexity since no manual controls or additional user interfaces are required
Data Source
AI summary
Disclosed is a vacuum cleaner. The present vacuum cleaner includes a drum mounted with a brush, a first motor for rotating the drum, a sensor for sensing a load applied to the first motor, a second motor generating suction pressure, and a processor for controlling at least one from the first motor and the second motor according to a size of a load sensed from the sensor.