Thermistor Sensor Cover with Radial Drainage Partitions
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Solution Overview
Problem
Conventional temperature sensors with thermistor elements face challenges in positioning and fixing the thermistor within the cover due to vibration, leading to potential contact with the cover and difficulties in drying cement, which increases manufacturing time and cost.
Innovation Solution
A temperature sensor design featuring a cover with a contact positioning part and connection paths allows for easy positioning and fixing of the thermistor element, enabling accurate placement and rapid drying of cement by draining water through these paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the thermistor element is fixed to the cover using cement, then the positioning and fixing of the thermistor element is improved, but the water component in the cement cannot be drained effectively causing prolonged drying time
Solution Approach 1:
The cement filling space is segmented into multiple regions by the radially extending partitions, creating separate channels for water drainage. This segmentation allows different zones of the cement to dry independently, significantly reducing overall drying time while maintaining positioning precision.
Solution Approach 2:
The radially extending partitions act as intermediary structures that facilitate water drainage from the cement. These partitions create pathways that guide water from the cement matrix to the outer surface, enabling efficient moisture removal without compromising the fixing strength of the cement.
2Manufacturing precision
If the thermistor element is positioned using a positioning tool with tapered part, then positioning accuracy is achieved, but the front part of the sheath pin seals the cover making water drainage difficult
Solution Approach 1:
The cover interior is segmented into multiple radial sections by the partitions, creating independent drainage channels. This segmentation allows water to escape from multiple locations simultaneously, solving the sealing problem caused by the sheath pin while maintaining positioning accuracy.
Solution Approach 2:
The drainage solution moves from a radial drainage pattern (blocked by the sheath pin) to an axial drainage pattern through the partitions. Water can now drain in the axial direction through the partition structures, bypassing the sealing effect of the sheath pin.
3Strength
If the cement is poured into the cover and dried to fix the thermistor element, then secure fixing is achieved, but the process requires complex positioning tools and prolonged drying time
Solution Approach 1:
The cover structure itself provides the positioning and drainage functions through its integrated partitions. The thermistor element is positioned by the natural geometry of the cover and partitions without requiring external positioning tools, while the partitions simultaneously provide drainage pathways.
Solution Approach 2:
The radially extending partitions serve multiple functions: they provide structural support for the cement, create drainage channels for water removal, and guide the positioning of the thermistor element. This multi-functionality eliminates the need for separate positioning tools and accelerates the drying process.
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 enhances manufacturing efficiency by ensuring precise positioning and secure fixing of the thermistor element, reducing the risk of contact with the cover and accelerating the drying process, thereby lowering production time and costs.
Implementation Method 1
The cement supports and fixes the thermistor element to the cover
Implementation Method 2
Through the connection paths, the front inside space of the cover located in front of the front part of the sheath pin is joined to a peripheral inside space of the cover
Implementation Method 3
enabling accurate placement and rapid drying of cement by draining water through these paths
Implementation Method 4
a thermistor element whose resistance value is changed according to an ambient temperature change
Data Source
AI summary
A temperature sensor has a thermistor element equipped with a pair of electrodes, a sheath pin into which a pair of signal lines is built, and a cover surrounding the thermistor element. A front part of each signal line is exposed from the sheath pin. The cover is placed at a front part of the temperature sensor. The cover has a contact positioning part with which the front part of the sheath pin is contacted. Cement is filled into a space between the cover and the thermistor element in front of the front part of the contact positioning part. Through the cement, the thermistor element is supported by and fixed to the cover. A front inside space formed in front of the front part of sheath pin and a peripheral inside space formed in a rear side of the front part of the sheath pin are formed between the front part of the sheath pin and the inside surface of the cover.