Suction nozzle, cleaner comprising suction nozzle, and control method of cleaner
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Solution Overview
Problem
Existing cleaners face issues with inconsistent brush rotation speed control near obstacles, frequent nozzle damage due to collisions, and inadequate cleaning performance in obstacle proximity zones.
Innovation Solution
A cleaner with a suction nozzle featuring a bumper system and a controller that adjusts brush revolutions and suction force based on obstacle detection, using sensors and detection circuits to manage the bumper's movement and generate control signals for optimal cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a sensor is used to detect obstacles and control brush rotational speed, then cleaning performance in obstacle proximity zones is improved, but the brush rotation speed changes sporadically and cannot be controlled at desired times
Solution Approach 1:
The bumper is pre-configured with a detectable structure (magnet, light-blocking material, or conductive material) that enables the detection system to sense obstacle proximity before actual contact occurs. This preliminary detection allows the control system to prepare and execute brush speed adjustment at the optimal moment, rather than reacting sporadically to sensor noise or post-contact conditions.
2Manufacturing precision
If the nozzle is made rigid for structural strength, then manufacturing precision is improved, but the nozzle is easily broken due to collision with obstacles
Solution Approach 1:
The bumper acts as a sacrificial cushioning element positioned between the rigid nozzle and potential obstacles. It absorbs impact forces through deformation or compression before they can reach the nozzle, preventing collision damage while allowing the nozzle to maintain its rigid, precision-manufactured structure for optimal cleaning performance.
3Measurement precision
If the bumper is made sensitive for precise obstacle detection, then measurement precision is improved, but the detection system becomes more complex
Solution Approach 1:
The detection system uses the bumper's physical response to obstacle proximity (magnetic field changes, light blocking, or conductivity changes) as feedback to trigger appropriate cleaning actions. This feedback mechanism provides reliable obstacle detection with straightforward circuitry, avoiding the need for complex sensor arrays or processing systems while maintaining adequate measurement precision for practical operation.
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 cleaner effectively detects nearby obstacles, prevents nozzle damage, and enhances cleaning performance by controlling brush speed and suction force in real-time, improving cleaning efficiency in obstacle proximity zones.
Implementation Method 1
a light emitter and a light receiver disposed inside the nozzle and configured to emit and detect light, respectively
Data Source
AI summary
An embodiment provides a cleaner which comprises: a suction nozzle; and a handle, and is moved by means of the handle, wherein the suction nozzle comprises a bumper and a brush, the bumper is composed of a first side and a second side, and is disposed outside the nozzle, the second side is disposed to be spaced apart from the first side by a first distance, and the number of rotations of the brush and suction power of the cleaner are controlled according to the first distance that changes in response to the bumper being pressed.