Fuel Selector Shutter Control for Combustion Switching

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Solution Overview

Problem

Current combustion devices require manual selection and tuning for fuel type changes, leading to complexity and increased costs due to the need for multiple fuel-specific components and infrastructure.

Innovation Solution

A combustion system with an electronic controller, fuel selector, shutter, and fuel composition sensor that automatically selects and adjusts fuel types by purging and sampling fuels to ensure proper air-to-fuel ratios, allowing for rapid switchover between fuel sources while ensuring safe ignition and performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual selection and tuning of fuel type is used, then device complexity is reduced, but productivity decreases due to time-consuming manual adjustments

Engineering Contradiction:
Improvefuel switching speedVSAvoidsystem complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The system performs self-diagnosis and self-adjustment by automatically detecting fuel type through sensor 104 and adjusting shutter 108 accordingly, eliminating the need for manual intervention and achieving rapid fuel switching without increasing operational complexity

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical adjustment with an automated control system that uses electronic sensor 104 and controller 106 to detect fuel type and automatically position shutter 108, substituting mechanical manual tuning with an electronic automation system

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If dedicated gas valve and gas train for each fuel type are used, then reliability of fuel combustion is improved, but device complexity increases due to multiple fuel-specific components

Engineering Contradiction:
Improvecombustion performanceVSAvoidnumber of components
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs a single multi-functional gas valve and gas train that can handle multiple fuel types (natural gas, propane, hydrogen) through automated configuration, eliminating the need for separate dedicated components for each fuel type while maintaining reliable combustion performance

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system maintains reliable combustion across different fuel types by dynamically adjusting shutter position 108 to change air-to-fuel ratio parameters based on detected fuel type, allowing a single gas valve and gas train to operate reliably with multiple fuels

Inventive Principle:
Principle #35Parameter changes

3Loss of time

If manual tuning of shutter for air-to-fuel ratio is used, then manufacturing cost is reduced, but loss of time increases due to tuning requirements

Engineering Contradiction:
Improvetuning timeVSAvoidmanufacturing cost
Core Design Contradiction:
Loss of timeVSEase of manufacture

Solution Approach 1:

The system pre-programs the relationship between fuel types and optimal shutter positions in controller 106, so that when fuel type is detected by sensor 104, the corresponding shutter position is automatically selected without requiring real-time manual tuning or complex real-time calculations

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system uses sensor 104 to detect fuel type and provides feedback to controller 106, which then automatically adjusts shutter 108 to the appropriate position, creating a closed-loop system that eliminates manual tuning time while keeping manufacturing costs reasonable

Inventive Principle:
Principle #23Feedback

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 automatic and efficient switching between fuel types, reducing manual intervention and infrastructure needs, thereby lowering costs and improving operational efficiency while ensuring proper combustion performance.

Implementation Method 1

The fuel combustion sensor can be configured to determine a fuel type

Methodology Applied
Scientific EffectFuel composition analysis:

Implementation Method 2

The electronic controller can be configured to output instructions for the burner to ignite the fuel

Methodology Applied
Scientific EffectCombustion: Combustion

Data Source

PatentUS20240011631A1Systems and Methods for Fuel Selection for Combustion Devices
Publication Date: 2024.01.11 RHEEM MFG CO
  • US20240011631A1 patent drawing
  • US20240011631A1 patent drawing
  • US20240011631A1 patent drawing

AI summary

A combustion system configured to receive fuel from a plurality of fuel sources, wherein the combustion system includes a burner, a shutter, a fuel selector, and an electronic controller configured to receive an indication of a selected fuel type from the fuel selector and output instructions for the shutter to adjust to a shutter position associated with the selected fuel type, the shutter position being configured to provide a predetermined supply of air to thereby effect an air-to-fuel ratio associated with combustion of the selected fuel type.