Dual-Function Boiler Probe for Low Water and Temperature Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional boiler systems require multiple tappings for water level and temperature monitoring, leading to costly redesigns and potential 'run-away boiler' conditions due to the inability to combine these functions in a single probe that can integrate with existing systems without draining the boiler.
Innovation Solution
A dual-function probe that combines low water cutoff and temperature sensing capabilities within a single unit, allowing integration into existing tappings and preventing 'run-away boiler' conditions by ensuring proper insertion and maintaining minimum boiler temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate probes are used for low water cutoff and temperature sensing, then each function can be monitored independently, but the boiler requires multiple tappings which increases device complexity and installation cost
Solution Approach 1:
The patent combines the low water cutoff sensor and temperature sensor into a single integrated probe assembly that can be inserted through a single tapping. The probe includes a conductive element for water level detection and a thermistor for temperature sensing, both housed in a single capsule that interfaces with the boiler through one opening, thereby reducing the number of tappings required while maintaining independent monitoring capabilities
Solution Approach 2:
The single probe assembly serves multiple functions: it provides both low water cutoff detection and temperature sensing capabilities. The conductive member detects water presence through conductivity changes, while the thermistor simultaneously measures temperature, making the single probe a multi-functional device that replaces what would traditionally require separate probes
2Ease of operation
If existing tappings are used without draining the boiler, then installation is simpler and faster, but it limits the ability to install new probes in conventional systems
Solution Approach 1:
The probe assembly is designed to be compatible with existing single tappings in conventional boilers. By consolidating both sensing functions into a single probe that fits through a standard tapping opening, the design allows installation in existing systems without requiring additional tappings or draining the boiler, thereby maintaining ease of installation while achieving adaptability to conventional boiler configurations
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
Enables efficient monitoring and control of boiler conditions without the need for additional tappings, ensuring safe operation and compatibility with existing systems, while preventing costly redesigns and unsafe temperature fluctuations.
Implementation Method 1
a temperature sensor including at least one thermistor in a housing
Implementation Method 2
The probe outputs may be integrated with an outdoor temperature sensor, a return temperature sensor, an ambient temperature sensor, and the like
Implementation Method 3
a low water cutoff sensor including a conductive member connecting to a low water cutoff conductive wire, forming a compression fit against the well interior, the conductive member and the low water cutoff conductive wire in electrical communication with the well
Data Source
AI summary
A dual functionality temperature control measurement and low water cutoff measurement system is taught within a single tapping to a boiler. This dual functionality combines a low water cutoff and temperature sensor into one control utilizing a sensing element suitable for use in a single existing tapping for a boiler. Independent of low water functionality, the temperature sensor is also capable of monitoring temperature as a replacement probe in an existing temperature sensor-only well. A conductive member provides a compression fit inside the probe well for thermistors, while simultaneously providing conduction with the well interior for a low water cutoff signal in a two-conductor well.