Cleaner Dust Sensor Layout in a Bent Suction Flow Path
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Solution Overview
Problem
Existing dust sensors in cleaners are complicated to mount, increase manufacturing costs, and suffer from reduced accuracy due to their placement far from the main body, especially in high airflow conditions, and face challenges with power and communication line connections.
Innovation Solution
A dust sensor is integrated into the suction flow path adjacent to the main body, closer to the suction pipe, where the airflow direction changes, reducing the flow rate and allowing for easier mounting, improved accuracy, and simplified power and communication line connections, with a sensor cover protecting the sensor and facilitating light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the dust sensor is mounted on a pipe far away from the main body, then the structure is simple, but the structure becomes complicated, manufacturing cost increases, and reliability decreases
Solution Approach 1:
The dust sensor is integrated directly into the main body of the cleaner, merging the sensing function with the main structure. This eliminates the need for separate mounting on distant pipes and reduces structural complexity while improving reliability through closer integration and shorter connection lines.
Solution Approach 2:
The dust sensor is extracted from the distant pipe mounting location and repositioned to the main body, removing the problematic long-distance connection structure and its associated complications.
2Measurement precision
If the dust sensor is mounted on a straight pipe with fast air flow rate, then the mounting location is simple, but the measurement accuracy deteriorates
Solution Approach 1:
The dust sensor is positioned in a specific local region of the suction flow path where the airflow characteristics are optimal for measurement. By selecting a location with appropriate flow conditions rather than any convenient mounting point, the patent achieves both accurate measurement and practical mounting.
3Device complexity
If the dust sensor is disposed far from the main body, then the suction flow path is simple, but the length of electric wire and communication line increases
Solution Approach 1:
The dust sensor is merged with the main body structure, eliminating the need for long electric wires and communication lines. The integration reduces the distance between components, simplifying the wiring and communication infrastructure while reducing material usage and potential failure points.
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 configuration enables easier and cost-effective installation of the dust sensor, enhances its accuracy by measuring dust concentration closer to the main body, allows for efficient power supply and communication, and adjusts suction motor current based on dust levels, extending battery life.
Implementation Method 1
a sensor cover protecting the dust sensor, and includes a window transmitting light of the dust sensor
Data Source
AI summary
Provided is a cleaner including a dust separation unit separating dust in the air, a suction flow path supplying outside air to the dust separation unit, a fan module moving the air in the suction flow path, and a dust sensor measuring concentration of dust in the suction flow path. The suction flow path includes a first suction flow path extending in a first direction and a second suction flow path connecting the first suction flow path to the dust separation unit and extending in a second direction that forms an obtuse angle with the first direction, and the dust sensor is disposed in the second suction flow path.