Airflow Sensor Air Passage Layout for Auto-Draw Vaporization
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Solution Overview
Problem
Existing vaporization devices require manual operation for heating, leading to cumbersome workflows and inefficiency, and often result in e-liquid waste due to inability to be turned off immediately, with airflow sensors being susceptible to damage and sensitivity issues.
Innovation Solution
A vaporization device design featuring a shell with separate air passages, an airflow sensor protected by a sealing element and bent air passages, an airflow adjustment mechanism, and an oil-absorbent cotton to enhance user experience and device longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the airflow sensor is placed in the air passage to detect airflow, then the detection function is achieved, but the sensor is damaged by high-speed airflow
Solution Approach 1:
The air passage is divided into a first air passage and a second air passage. The first air passage handles high-speed airflow from the user's mouth, while the second air passage directs low-speed airflow to the sensor. This segmentation protects the sensor from high-speed airflow damage while maintaining detection functionality.
Solution Approach 2:
The second air passage acts as an intermediary channel between the first air passage and the airflow sensor. It transforms the high-speed airflow from the first passage into low-speed airflow suitable for sensor detection, protecting the sensor while enabling accurate measurement.
2Ease of operation
If manual operation is used to control heating, then the device is simple to manufacture, but the operation process is cumbersome and time-consuming
Solution Approach 1:
The device automatically detects user inhalation through the airflow sensor and activates heating without manual intervention. The system serves itself by using the detected airflow signal to control the heating element, eliminating the need for buttons or switches.
Solution Approach 2:
The airflow sensor provides real-time feedback about user inhalation to the control system. This feedback loop enables automatic control of the heating element, allowing the device to respond dynamically to user needs without manual operation.
3Productivity
If the device remains on continuously, then it is ready for immediate use, but e-liquid is wasted
Solution Approach 1:
The heating element operates periodically based on detected inhalation events rather than continuously. The device switches between on and off states, activating only when the sensor detects user inhalation, thereby preventing e-liquid waste while maintaining usability.
4Device complexity
If a straight air passage is used, then the structure is simple, but the airflow directly impacts the sensor causing damage
Solution Approach 1:
The second air passage includes bent portions that curve the airflow path. This curvature slows down the airflow and redirects it away from the sensor, protecting the sensor from high-speed impact while maintaining a relatively simple overall structure.
Data Source
AI summary
This application provides a vaporization device, including a shell, a bracket, a circuit board, an airflow sensor, and a sealing element. The shell forms a cavity and includes an installation hole. The bracket is arranged within the cavity. The circuit board is fixed to the bracket and includes a first surface and a second surface opposite to the first surface. The second surface faces the installation hole. The circuit board includes a first air hole. The airflow sensor is electrically connected to the second surface. The shell defines a first air passage and a second air passage, the first air passage communicating with the installation hole and the first air hole, the second air passage communicating with the first air passage and positioned on one side of the first air passage, with the airflow sensor arranged at one end of the second air passage away from the first air passage.