Steam Generator Igniting Cover Airflow Backflow Prevention
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Solution Overview
Problem
Airflow backflow occurs in car washers, affecting normal ignition due to air escaping from the igniting cover, which is a common issue in steam car washing systems.
Innovation Solution
A steam generator design that includes a windproof cover, an igniting cover, and an air inlet grating around the windproof cover, with airflow through holes and an air inlet baffle, to prevent air from flowing out and back into the igniting cover, ensuring proper airflow direction and blocking air from escaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If an open igniting cover design is used, then the ignition device can be easily accessed and maintained, but airflow backflow occurs causing ignition failure
Solution Approach 1:
The igniting cover is segmented into multiple components: the cover body, air inlet grating with through holes, and air inlet baffle. This segmentation allows each component to perform its specific function - the grating provides structural support and defined airflow paths, the baffle prevents backflow, and the cover protects the ignition device, collectively solving both accessibility and reliability issues
Solution Approach 2:
The air inlet baffle acts as an intermediary element between the air inlet and the combustion chamber. It selectively blocks the backflow path while permitting forward airflow through its strategically positioned structure, thus preventing ignition failure without compromising the open design accessibility
2Productivity
If the air inlet of the igniting cover is enlarged to improve airflow, then combustion efficiency increases, but airflow backflow becomes more severe
Solution Approach 1:
The air inlet grating implements local quality by providing different structures at different locations: the grating with controlled through holes is positioned where backflow occurs, while the main air inlet remains enlarged for high airflow. This localized structural differentiation allows the system to simultaneously achieve high combustion efficiency and prevent backflow-induced ignition failure
3Reliability
If a closed windproof cover is used to prevent airflow backflow, then ignition stability improves, but heat dissipation and steam generation efficiency decrease
Solution Approach 1:
The air inlet grating functions as a porous structure with multiple through holes distributed across its surface. This porous design allows sufficient airflow passage for heat dissipation and steam generation while the surrounding grating framework maintains structural integrity and prevents severe backflow, thus balancing reliability and productivity
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 solution effectively prevents airflow backflow, ensuring consistent ignition and improving the efficiency of the steam car washing process by directing airflow correctly into the combustion chamber.
Implementation Method 1
the air inlet grating being located on the inner side of an air inlet of the igniting cover, to prevent airflow in the igniting cover from flowing out from an inlet of the igniting cover
Implementation Method 2
an airflow through hole is provided on the air inlet grating, so that the airflow entering from an inlet of the windproof cover flows towards a middle part of the igniting cover after passing through the airflow through hole
Implementation Method 3
a boiler having a combustion chamber
Data Source
AI summary
Some embodiments of the disclosure provide a steam generator and a car washer with the steam generator. The steam generator includes: a boiler having a combustion chamber. The steam generator further includes: a windproof cover, at least a part of an ignition device of the steam generator being located in the windproof cover; an igniting cover, at least a part of the igniting cover being located in the combustion chamber, and an outlet of the windproof cover being located in the igniting cover; an air inlet grating, the air inlet grating being provided around the windproof cover and connected with the windproof cover, and the air inlet grating being located on an inner side of an air inlet of the igniting cover, to prevent airflow in the igniting cover from flowing out from the inlet of the igniting cover.