Gas Sensor Electrode Spacing and Heater Proximity Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing gas sensors face challenges in maintaining consistent temperature and accuracy due to the increased size and power consumption caused by the long distance between the heater and the second solid electrolyte body, leading to variations in temperature and measurement accuracy.
Innovation Solution
A gas sensor design featuring a single plate-like solid electrolyte body with a specific ratio of minimum distance between electrodes to thickness, reducing current leakage and enabling efficient heating, thus minimizing size and power consumption while maintaining high accuracy in measuring gas concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reference gas chamber, first solid electrolyte body, and gas chamber are arranged in an interval between the heater and the second solid electrolyte body, then the gas sensor can function properly, but the size of the gas sensor is increased
Solution Approach 1:
The patent merges the reference gas chamber and gas chamber into a single integrated chamber structure that is positioned adjacent to the heater without requiring a long interval. This consolidation allows the heater to be placed closer to the second solid electrolyte body while still maintaining proper gas flow paths and reference conditions, thereby reducing the overall device size.
Solution Approach 2:
The patent repositions the chambers and heater in a compact three-dimensional arrangement where the reference gas chamber and gas chamber share spatial proximity to the heater. By optimizing the spatial distribution in multiple dimensions rather than a linear arrangement, the design achieves reduced device volume while preserving functional requirements.
2Device complexity
If the distance between the heater and the second solid electrolyte body is increased, then the gas sensor can accommodate internal components, but the temperature of the second solid electrolyte body becomes difficult to keep constant
Solution Approach 1:
The heater is positioned in advance to be in direct proximity to the second solid electrolyte body, enabling immediate and efficient heat transfer. This preliminary positioning of the heating element eliminates the need for long distance accommodation, thereby maintaining constant temperature conditions for the second solid electrolyte body while still allowing internal component arrangement.
3Device complexity
If the distance between the heater and the second solid electrolyte body is increased, then more space is available for internal structures, but the power consumption of the heater increases
Solution Approach 1:
The patent combines the heating function with the chamber structure by positioning the heater within or adjacent to the integrated reference gas chamber and gas chamber assembly. This merging allows the heater to be in direct thermal contact with the second solid electrolyte body, significantly reducing the distance over which heat must be transmitted and thereby lowering power consumption while still providing necessary internal structure space.
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
The design improves measurement accuracy by reducing current leakage and facilitating consistent heating, resulting in a more compact and energy-efficient gas sensor.
Implementation Method 1
a single plate-like solid electrolyte body which has oxygen ion conductivity and is disposed between said gas chamber and said reference gas chamber
Implementation Method 2
a heater which works to heat the first and second solid electrolyte bodies up to an activatable temperature thereof
Data Source
AI summary
A gas sensor is provided which constitutes a pump cell 3 and a sensor cell 5 using a single solid electrolyte body 2, a pump electrode 30, a sensor electrode 50, and a reference electrode 80 and is designed to decrease power consumed by a heater and permit a size thereof to be reduced. A ratio of a minimum distance L2 between the pump electrode 30 and the sensor electrode 50 to a thickness d of the solid electrolyte body 2 is set to be three or more, thereby enabling the gas sensor 1 to make the pump cell 3 and the sensor cell 5 using the single solid electrolyte body 2, the pump electrode 30, the sensor electrode 50, and the reference electrode 80. Only either of the gas chamber or the reference gas chamber is, therefore, located between the solid electrolyte body and the heater, thereby decreasing distances of the pump cell and the sensor cell to the heater. This facilitates the ease with which the heater heats up the pump cell and the sensor cell.