Analog Up/Down Timer Boiler Control Without Outdoor Sensors
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Solution Overview
Problem
Conventional boiler control systems require outdoor temperature sensors and complex digital data processors to reduce boiler temperature, leading to increased costs and potential temperature runaway conditions, which are inefficient and environmentally harmful.
Innovation Solution
An electronic control circuitry that automatically adjusts boiler temperature based on circulator activation time without outdoor sensors, using an analog up/down timer circuit and dual temperature sensing, along with fault detection and multiple burner ignition relays to enhance reliability and prevent runaway conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If outdoor temperature sensors and complex digital data processors are added to reduce boiler temperature, then boiler temperature control efficiency is improved, but device complexity and cost increase
Solution Approach 1:
The boiler control system uses its existing internal temperature sensors and circulator activation signals to automatically adjust the temperature setpoint, eliminating the need for external outdoor temperature sensors. The system serves itself by utilizing already-available data from its own operation to make temperature adjustments.
Solution Approach 2:
An analog up/down timer circuit acts as an intermediary component that processes the circulator activation signal and generates the temperature setpoint adjustment signal. This simple analog circuit mediates between the existing circulator control and the temperature setpoint, avoiding complex digital processing.
2Loss of energy
If outdoor temperature sensors and complex digital data processors are added to reduce boiler temperature, then fuel consumption is reduced, but cost increases
Solution Approach 1:
The patent replaces expensive outdoor temperature sensors and digital processors with inexpensive analog timer circuitry that can be easily manufactured. The analog components are simple, reliable, and significantly cheaper than their digital counterparts.
Solution Approach 2:
The system uses its existing internal resources (temperature sensors, circulator signals) to achieve fuel savings without requiring additional expensive external sensors or processing units, thereby reducing manufacturing costs while maintaining energy efficiency.
3Measurement precision
If complex digital data processors are used for temperature control, then temperature control precision is improved, but reliability decreases due to single point failures
Solution Approach 1:
The patent replaces complex digital data processing systems with simple analog timer circuitry. This mechanical/electrical substitution eliminates vulnerable digital components while maintaining sufficient temperature control precision through analog signal processing.
Solution Approach 2:
The system incorporates redundant temperature sensing and fault detection circuits that provide backup protection against failures. The dual temperature sensing approach ensures that if one sensor fails, the other can maintain safe operation, cushioning against single point failures.
4Object-generated harmful factors
If outdoor temperature sensors are added to reduce boiler temperature, then greenhouse emissions are reduced, but device complexity increases
Solution Approach 1:
The boiler control system reduces greenhouse emissions by utilizing its own internal temperature data and circulator activation patterns to automatically adjust operating temperature, eliminating the need for external outdoor temperature sensors and their associated complexity.
Solution Approach 2:
The existing temperature sensors and circulator control circuitry serve multiple functions: they control both the heating operation and provide the data needed for dynamic temperature setpoint adjustment, eliminating the need for separate outdoor temperature sensing systems.
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 reduces fuel consumption and greenhouse emissions while maintaining high reliability at a lower cost, allowing for efficient boiler temperature adjustment without the need for external sensors or complex digital controls.
Implementation Method 1
an analog up/down timer circuit having an input coupled to an output of the sensor circuit and configured to generate a variable threshold voltage that varies as a function of an activation time of the circulator
Data Source
AI summary
An apparatus comprises a sensor circuit configured to detect activation of at least one circulator arranged to circulate liquid from a boiler through at least one circulation loop and back to the boiler. An analog up/down timer circuit has an input coupled to an output of the sensor circuit and generates a variable threshold signal that varies as a function of an activation time of the at least one circulator. A burner control circuit receives the variable threshold signal from the analog up/down timer circuit and generates an ignition control signal based at least in part on comparison of a temperature sensor signal of the boiler with the variable threshold signal. An ignition driver receives the ignition control signal from the burner control circuit and generates an ignition signal for a burner configured to burn fuel to heat the liquid in the boiler based at least in part on the ignition control signal.