Heating Tool Tip Structure for Fast Thermocouple Sensing
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Solution Overview
Problem
Existing heating tools, such as soldering irons, face challenges in precise temperature control due to deformation caused by fixing thermocouples, which reduces heat transfer efficiency and leads to delayed temperature sensing and potential overheating.
Innovation Solution
A heating tool design with a thermocouple temperature sensor integrated within a tip made of high heat conductivity material, where the sensor is pressed into a hollow axial core and deformed to enhance static friction, ensuring accurate temperature feedback without compromising heat transfer by using a bimetallic thermocouple and specific wire configurations for efficient heat conduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the tip is pressed to fix the thermocouple pipe, then the thermocouple is securely fixed within the tip, but the tip is deformed and heat transfer properties are reduced
Solution Approach 1:
A press-fit structure with a press-fit portion is introduced as an intermediary mechanism between the thermocouple pipe and the tip. This press-fit portion deforms elastically under pressing force to secure the thermocouple pipe, while the elastic deformation recovers to maintain the tip's heat transfer properties, thus mediating between fixation stability and heat transfer efficiency
Solution Approach 2:
The elastic modulus and hardness of the press-fit portion are specifically controlled to be lower than those of the tip material. This parameter change allows the press-fit portion to undergo elastic deformation during pressing while the tip maintains its structural integrity and heat transfer properties, resolving the contradiction between secure fixation and heat transfer efficiency
2Reliability
If the tip is pressed to fix the thermocouple pipe, then the thermocouple is securely fixed, but the time lag in heat transfer increases causing delayed temperature sensing
Solution Approach 1:
The press-fit portion acts as an intermediary that isolates the pressing deformation from the tip's heat transfer path. By concentrating the deformation in the press-fit portion with lower elastic modulus, the tip's thermal conduction path remains intact, maintaining rapid temperature sensing response while achieving secure thermocouple fixation
Solution Approach 2:
By changing the material parameters (elastic modulus and hardness) of the press-fit portion to be lower than the tip material, the design allows localized deformation without affecting the overall heat transfer efficiency and temperature response time of the tip
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 design allows for precise and rapid temperature sensing, enabling accurate control of the heating tool, preventing overheating and ensuring efficient heat transfer, thus maintaining optimal operating conditions.
Implementation Method 1
The heater coil 20 also includes a distal end wire 40 extending to a thermocouple temperature sensor 22
Implementation Method 2
A heating tool design with a thermocouple temperature sensor integrated within a tip made of high heat conductivity material
Implementation Method 3
the sensor is pressed into a hollow axial core and deformed to enhance static friction
Data Source
AI summary
A heating tool having a temperature sensor fixed within a tip of the heating tool with maximum heat conductivity to the temperature sensor.