Fail-Safe Multi-Sensor Component for HVAC Reliability
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Solution Overview
Problem
HVAC systems face challenges with sensor degradation and failure due to thermal and chemical changes, leading to inaccurate temperature measurements and potential system failures, particularly in harsh environments like furnaces and boilers, where multiple sensors increase complexity and cost.
Innovation Solution
A fail-safe multi-sensor component integrating temperature, pressure, and medium presence detection within a single housing, utilizing a heater and temperature detector to provide accurate readings and monitor sensor health, reducing the need for separate sensors and supporting components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant sensors are used to improve reliability, then the probability of incorrect temperature recognition is reduced, but the system complexity and cost increase
Solution Approach 1:
The patent combines multiple sensor functions (temperature detection, pressure detection, medium presence detection) into a single integrated sensor component. This merging approach maintains reliability through functional redundancy while reducing system complexity by eliminating the need for multiple separate sensors and their associated mounting hardware, wiring, and support components.
Solution Approach 2:
The integrated sensor component performs multiple functions simultaneously - it detects temperature, pressure, and medium presence/absence. This multi-functionality allows a single component to replace what would traditionally require multiple separate sensors, thereby maintaining comprehensive monitoring capability while simplifying the overall system architecture.
2Reliability
If multiple separate sensors are used for temperature, pressure, and presence detection, then comprehensive monitoring is achieved, but mounting difficulties and wiring complexity increase
Solution Approach 1:
The patent integrates temperature, pressure, and presence detection capabilities into a single sensor housing that can be mounted as one unit. This eliminates the mounting difficulties associated with installing multiple separate sensors at different locations and orientations, while still providing comprehensive monitoring of all three parameters.
Solution Approach 2:
The single sensor component universally handles multiple detection tasks - it can detect temperature, pressure, and whether the medium is present or absent. This universal capability simplifies the installation process compared to mounting and configuring multiple specialized sensors, while maintaining comprehensive monitoring coverage.
3Measurement precision
If individual sensors are fabricated and mounted separately, then each sensor can be optimized for its specific function, but the overall system cost and complexity increase
Solution Approach 1:
The patent combines multiple sensor functions into a single integrated component that can be manufactured as one unit. This approach reduces manufacturing costs by eliminating the need to purchase, stock, and install multiple separate sensors, while still providing accurate measurements for temperature, pressure, and presence detection through the integrated design.
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 solution enhances accuracy and reliability by confirming sensor functionality, predicting potential failures, and simplifying system design, while reducing costs and complexity by integrating multiple functions into a single unit.
Implementation Method 1
a heater affixed to the dry side of the substrate and operable to heat the sensor housing to a predetermined temperature
Implementation Method 2
a temperature detector affixed to the dry side of the substrate and operable to detect temperature changes of the sensor housing
Data Source
AI summary
A system and method is presented for a multi-sensor component for an HVAC system. The multi-sensor component comprises a sensor assembly, having a temperature detector for measuring a temperature of an object or medium, a presence detector to detect the presence of the object or medium against the sensor, and a pressure detector for measuring a pressure of the medium. The temperature, presence and pressure detectors may also be affixed within a single sensor housing. In a heating mode the multi-sensor component is heated by a heater, and in a cooling mode the multi-sensor component cools toward a temperature of the object or medium, and the temperature detector provides temperature data indicative of a temperature response comprising one of a temperature change, a rate of change and a time constant of a thermal decay rate of the multi-sensor component and the presence of the object or medium.