Aerosol Inhaler Power Supply PCB Layout for Accurate Temperature Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing power supply units for aerosol inhalers lack accurate temperature detection of the power supply, which affects the service life and charging/discharging performance.
Innovation Solution
A power supply unit with a temperature sensor mounted on the second surface of a circuit board, where the power supply layer and ground layer are positioned between the first and second surfaces, ensuring accurate temperature detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is mounted on a circuit board to detect power supply temperature, then temperature detection capability is improved, but measurement precision deteriorates due to interference from power supply paths and ground paths on the same board
Solution Approach 1:
The circuit board is divided into distinct functional layers: power supply layers, ground layers, and a temperature sensor mounting layer. This segmentation isolates the temperature sensor from thermal interference generated by power supply paths, allowing accurate temperature detection without interference from electrical currents and heat generation in power circuits.
Solution Approach 2:
The temperature sensor is mounted on the reverse surface (second surface) of the circuit board, while power supply paths and ground paths are confined to internal layers between the first and second surfaces. This three-dimensional spatial arrangement separates the sensor from thermal interference sources in the vertical dimension, enabling accurate temperature measurement away from heat-generating components.
2Reliability
If the power supply unit includes comprehensive temperature monitoring and control, then service life and performance are improved, but device complexity increases
Solution Approach 1:
The temperature sensor is integrated directly into the circuit board structure, merging the sensing function with the board itself rather than requiring a separate sensor module. This integration reduces device complexity while maintaining reliable temperature monitoring capability, allowing the controller to adjust charging/discharging based on power supply temperature without adding significant structural complexity.
Solution Approach 2:
The temperature sensor provides real-time feedback to the controller about the power supply temperature, enabling the controller to adjust charging and discharging operations accordingly. This feedback mechanism improves reliability by preventing operation under extreme temperature conditions that would reduce service life, while the automated control minimizes the complexity burden on the user.
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
Enhances the accuracy of temperature detection, thereby improving the service life and performance of the power supply unit.
Implementation Method 1
a temperature sensor configured to detect a temperature of the power supply
Data Source
AI summary
A power supply unit for an aerosol inhaler includes: a power supply configured to supply power to a load that atomizes an aerosol source; a temperature sensor configured to detect a temperature of the power supply; a controller; and a circuit board. The circuit board includes: a first surface; a second surface; a power supply layer in which a power supply path is formed; and a ground layer. The power supply layer and the ground layer are provided between the first surface and the second surface. The temperature sensor is mounted on the second surface, and at least one of the power supply path and the ground path is not formed in a region which overlaps the temperature sensor as viewed from a first direction, the first direction being a direction in which the first surface and the second surface are opposed to each other.