Heater Base Temperature Sensing Through a Mounting Hole
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Solution Overview
Problem
Existing aerosol generating devices face challenges in accurately measuring the internal temperature of heaters due to temperature gradients and the presence of thermal insulation layers, leading to inaccurate temperature control and potential over-baking of aerosol generation products.
Innovation Solution
Incorporating a first temperature sensor within a mounting hole in the heater's base body to directly measure internal temperature, allowing for more accurate and timely temperature control by minimizing the impact of surface temperature gradients and thermal insulation layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If temperature sensor is placed on the surface of the base body, then the structure is simple, but the measurement accuracy is low due to temperature gradient between surface and internal
Solution Approach 1:
The temperature sensor is nested within the base body through a mounting hole, allowing the measurement portion to be positioned inside the base body while maintaining structural integrity. This resolves the contradiction by enabling accurate internal temperature measurement without compromising manufacturing simplicity.
Solution Approach 2:
The temperature sensor is transitioned from surface-level placement to internal placement through the mounting hole structure. This dimensional transition allows the sensor to measure internal temperature directly, eliminating the temperature gradient error that exists when measuring only from the surface.
2Measurement precision
If temperature sensor is placed inside the base body, then the measurement accuracy is high, but the device complexity increases
Solution Approach 1:
The base body is segmented by introducing a mounting hole, which separates the temperature sensing function from the heating function. This segmentation allows the temperature sensor to be independently positioned inside the base body without complicating the overall heater structure, as the mounting hole serves a dedicated purpose.
Solution Approach 2:
The mounting hole serves multiple functions: it provides access for temperature measurement, maintains structural integrity of the base body, and allows for thermal isolation of the sensor. This multi-functionality reduces the need for additional components, thereby limiting the increase in device complexity.
3Loss of energy
If thermal insulation layer is added to the heater, then the heat loss is reduced, but the temperature measurement accuracy is affected
Solution Approach 1:
The temperature measurement function is extracted from the external environment and placed inside the base body through the mounting hole. This extraction allows the sensor to measure the actual internal temperature before thermal insulation effects occur, thereby maintaining measurement accuracy while the thermal insulation layer can still be applied externally to reduce heat loss.
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 temperature measurement sensitivity and accuracy, enabling precise control of the heater's temperature to prevent over-baking and improve user experience by ensuring consistent aerosol generation.
Implementation Method 1
a first temperature sensor, where a measurement portion thereof is arranged in the mounting hole to measure a temperature inside the base body
Implementation Method 2
a plurality of first air holes run through the base body, the first air holes allow air to pass through, and the air is heated by the base body when flowing through the first air holes
Data Source
AI summary
A heater, a heating assembly, a heating module, and an aerosol generating device are provided. The heater includes a base body, a mounting hole, and a first temperature sensor. A plurality of first air holes run through the base body. The first air holes allow air to pass through, and the air is heated by the base body when flowing through the first air holes. The mounting hole is provided in the base body. A measurement portion of the first temperature sensor is arranged in the mounting hole to measure a temperature in the base body.