Portable Gas Heater CO2 Shutoff for Enclosed Safe Use
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Solution Overview
Problem
Existing portable gas-fired heaters are not safe or certified for use in small recreational enclosures due to inadequate combustion control at high and low firing conditions, reduced pressure, and lack of oxygen depletion systems and carbon dioxide level measurement/response.
Innovation Solution
A portable gas-fired heater design featuring a housing with a burner assembly, radiant surface, plenum chamber, and a carbon dioxide detector system that automatically shuts off the fuel valve in response to detected carbon dioxide levels, ensuring safe operation in enclosed environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a gas-fired heater is designed for portable use, then it provides heating capability in various locations, but it emits carbon monoxide and other harmful combustion products that make it unsafe for enclosed environments
Solution Approach 1:
The patent implements feedback mechanisms including oxygen depletion sensors and carbon dioxide detectors that continuously monitor air quality and automatically shut off the fuel valve when unsafe conditions are detected, resolving the contradiction between portable heating capability and harmful emissions in enclosed spaces
Solution Approach 2:
The heater incorporates self-monitoring and self-shutdown capabilities through integrated sensors and control systems that automatically detect harmful conditions and terminate operation without external intervention, making the device inherently safer for enclosed environments
2Ease of operation
If the heater operates at high and low firing conditions, then it provides flexible heating control, but it fails to meet safety regulations regarding combustion requirements at varying firing conditions
Solution Approach 1:
The patent employs dynamic combustion control through variable firing rates and adaptive oxygen depletion systems that adjust operation based on real-time conditions, ensuring safety compliance across all heating levels rather than relying on fixed combustion parameters
Solution Approach 2:
The system monitors and responds to changing combustion parameters including oxygen levels, carbon dioxide concentrations, and pressure variations, adjusting operation dynamically to maintain safety compliance at all firing conditions
3Ease of manufacture
If the heater is designed for simple portable construction, then it is easy to manufacture and transport, but it lacks oxygen depletion systems and carbon dioxide detection capabilities required for safety certification
Solution Approach 1:
The patent combines heating, sensing, and control functions into an integrated portable unit, merging the heater element with oxygen depletion sensors, carbon dioxide detectors, and automated control systems to achieve safety certification without compromising portability or manufacturability
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 heater operates safely and efficiently in small recreational enclosures by maintaining combustion control at varying conditions and preventing harmful carbon dioxide buildup, meeting regulatory standards.
Implementation Method 1
a carbon dioxide detector system adapted to shut off the fuel valve in response to detection of a predetermined level of carbon dioxide
Implementation Method 2
a venturi for mixing air from the air inlet and fuel from the fuel valve into a fuel-air mixture
Implementation Method 3
Gas is introduced into the chamber to be mixed with the air in order to complete combustion and provide an infrared heating surface
Implementation Method 4
Gas is introduced into the chamber to be mixed with the air in order to complete combustion
Data Source
AI summary
A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing.