Steam Oven Drain Valve for Power-Free Aircraft Water Draining
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Solution Overview
Problem
Current steam ovens on-board aircraft and passenger transport vehicles lack effective draining systems, as they either do not include a drain option or require power to operate, leading to water accumulation that can freeze, damage systems, and promote bacterial growth in stagnant water.
Innovation Solution
A power-free and automatic steam oven drain valve system with redundant valves and filters, allowing water to drain without electrical power, using gravity or vacuum assistance to prevent freezing and bacterial proliferation, and ensuring safety through dual valve operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a drain valve system is added to the steam oven, then water draining capability is improved, but device complexity increases
Solution Approach 1:
The drain valve system is designed to operate automatically using the existing aircraft water system pressure and gravity, without requiring external power or complex control mechanisms. The system self-regulates water drainage through pressure differential operation, eliminating the need for powered actuators or complex electronics.
Solution Approach 2:
The drain valve system utilizes the aircraft's existing water system infrastructure and pressure mechanisms to achieve drainage functionality, rather than creating an entirely separate powered system. This multi-uses existing system capabilities for the new drainage function, reducing overall complexity.
2Ease of operation
If a powered solenoid valve is used for draining, then drainage control is improved, but power dependency increases
Solution Approach 1:
The patent replaces powered solenoid valves with a mechanically-operated valve system that uses the aircraft water system's own pressure and gravity to control drainage. This substitution eliminates electrical power requirements while maintaining effective drainage control through pressure differential operation.
Solution Approach 2:
The drainage system operates autonomously using naturally occurring pressure differentials and gravity, without requiring external power sources. The system activates automatically when water pressure is available and drains water without human intervention or electrical control.
3Productivity
If water remains in the steam oven lines, then system readiness is improved, but freezing damage risk increases
Solution Approach 1:
The drain valve system is designed to automatically activate and drain water from the steam oven lines before the aircraft enters freezing conditions or before the water system is shut down. This preliminary drainage action prevents water accumulation that could subsequently freeze and cause damage.
Solution Approach 2:
The system uses the natural pressure differentials and gravity that occur during aircraft water system operation to automatically drain and protect the steam oven lines. What would normally be harmful water accumulation is converted into a controlled drainage process that prevents freezing damage.
4Ease of operation
If water is not drained from the steam oven, then convenience is improved, but bacterial growth risk increases
Solution Approach 1:
The drain valve system operates automatically without requiring manual intervention to drain water after steam oven use. This self-activating system maintains hygiene by automatically removing stagnant water that would otherwise promote bacterial growth, while requiring no additional operational steps from the user.
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 system efficiently and safely drains water from steam ovens and associated lines, preventing damage from freezing and bacterial growth, even when the vehicle is unpowered, ensuring continuous operation and hygiene.
Implementation Method 1
allowing water to drain without electrical power, using gravity or vacuum assistance
Implementation Method 2
the water is injected inside a warm oven in a mist form, and when the water mist contacts the heating elements or the fan, the mist vaporizes instantly and becomes steam
Implementation Method 3
only the water in the lines behind the vacuum break is allowed to drain
Data Source
Figure 1
Figure 2
AI summary
Embodiments of the present invention provide steam oven drain valve systems (22) and methods for draining steam ovens and associated water lines (18) on aircraft and other passenger transport vehicles.