Combustion Device Shield Mechanism for Safe Flame Extinguishment
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Solution Overview
Problem
Existing combustion devices face difficulties in safely extinguishing flames due to air-oxygen contact with the candle wick, leading to incomplete extinguishing, risk of scalding, and carbonization, especially with larger flames.
Innovation Solution
A combustion device design featuring a flow guiding assembly with pivotable shield members and guide vanes that allows for easy flame extinguishment by controlling air flow, reducing the risk of air-oxygen contact and minimizing heat transfer, incorporating a housing structure for safety and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the user blocks the opening on the shield to extinguish the flame, then the flame can be extinguished, but air still flows through the flow guiding mechanism to contact the candle wick causing incomplete extinguishing
Solution Approach 1:
The shield is divided into a first shield member (fixed) and a second shield member (movable), allowing independent control of the opening and flow guiding mechanism. This segmentation enables the second shield member to be moved to simultaneously block both the opening and the flow guiding mechanism, ensuring complete flame extinguishment while maintaining ease of operation.
Solution Approach 2:
The movable second shield member serves multiple functions: it can block the opening when in the first position and block the flow guiding mechanism when in the second position. This multi-functionality allows a single component to address both extinguishment requirements, improving reliability without adding operational complexity.
2Reliability
If the user removes the shield or moves the candle wick with a long rod to extinguish the flame, then complete extinguishing can be achieved, but the operation becomes complex and there is a risk of scalding
Solution Approach 1:
The movable second shield member extracts the dangerous operation of manually moving the candle wick or removing the shield. By providing a controlled mechanism that blocks the flow guiding mechanism, it eliminates the need for users to handle hot components directly, reducing scalding risk while maintaining complete extinguishment effectiveness.
Solution Approach 2:
The movable second shield member acts as an intermediary between the user and the hot candle wick/flow guiding mechanism. Instead of directly manipulating hot components, the user operates the shield mechanism which then controls the air flow, providing a safe intermediate step that ensures complete extinguishment without exposure to heat.
3Reliability
If the containment lid is placed on the candle wick to extinguish the flame, then the flame can be extinguished, but it is difficult when the flame is large and there is a risk of scalding
Solution Approach 1:
The movable second shield member provides a dynamic solution that adapts to different flame sizes. By moving the shield to the second position, it blocks the flow guiding mechanism regardless of flame size, eliminating the difficulty of placing a containment lid on large flames while maintaining complete extinguishment effectiveness.
Solution Approach 2:
The design converts the harmful hot air flow that sustains the flame into a beneficial controlled mechanism. By blocking the flow guiding mechanism with the movable shield, the same air flow path that causes the problem is used as the control point for extinguishment, making the process easier and safer while ensuring complete flame extinction.
4Object-generated harmful factors
If the candle wick is allowed to cool naturally after extinguishing, then smoke and smell are produced due to carbonization, but blocking air flow completely may cause other issues
Solution Approach 1:
The movable second shield member is positioned to block the flow guiding mechanism immediately when the flame is extinguished, preventing hot air flow that would cause carbonization. This preliminary action stops the harmful process before it begins, eliminating smoke and smell production while maintaining proper air flow control through the fixed first shield member.
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 safe and efficient flame extinguishment with reduced smoke and odor, while simplifying the structure and production costs through sheet metal components, and preventing accidental scalding by containing heat effectively.
Implementation Method 1
a flow guiding mechanism, which includes a plurality of vanes and a control mechanism
Implementation Method 2
If the user just blocks the opening on the shield, air still flows through the flow guiding mechanism to contact with the candle wick
Implementation Method 3
When liquid fuel is put into the combustion device, the liquid fuel is vaporized by heat from an external fire
Data Source
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AI summary
The present invention provides a combustion device (10), which includes a fuel tank assembly (30) and a candle wick (40). The fuel tank assembly (30) includes a first tank (31), a second tank (32), a connection tube (33), and a switch (34). The capacity of the second tank (32) is less than the capacity of the first tank (31). An end of the connection tube (33) is connected to the first tank (31), and another end of the connection tube (33) is connected to the second tank (32). The connection tube (33) communicates with internal spaces of the first and second tanks (31, 32). The switch (34) is disposed between the first and second tanks (31, 32) so as to selectively open or close a channel interconnected between the first and second tanks (31, 32). The candle wick (40) is mounted in the second tank (32). Therefore, the combustion device (10) is easy to use by the above structure.