Gas Oven Flow-Modulating Valves for Divided Cavity Heating
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Solution Overview
Problem
Gas ovens with traditional ON/OFF valves struggle to adjust gas flow effectively when a divider is used to divide the cooking cavity, leading to difficulties in controlling cooking area and temperature, and safety concerns due to potential explosive ignition and temperature fluctuations.
Innovation Solution
A gas oven design incorporating solenoid valves with flow rate modulating capabilities, including a coil, plunger, valve body, restoring spring, and adjustment unit, allows for precise control of gas flow to each burner, enabling multiple operating modes and preventing explosive ignition by adjusting the opening degree of the valves based on temperature and cooking area changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a traditional ON/OFF valve is used to control gas supply, then the valve structure is simple, but the gas flow cannot be properly adjusted when cooking area changes
Solution Approach 1:
The gas supply system is segmented into multiple independent control zones. Each cooking cavity has its own flow rate modulating valve that can independently adjust gas flow, allowing the system to adapt to different cooking configurations (single cavity or dual cavity operation) without requiring complete system redesign.
Solution Approach 2:
The valve system transitions from a static ON/OFF control mode to a dynamic flow rate modulation mode. The flow rate modulating valves can continuously adjust their opening degree to match varying cooking requirements, providing real-time adaptability when cooking areas change due to divider placement.
2Adaptability or versatility
If the cooking cavity is divided into individual cavities using a divider, then cooking versatility is improved, but gas flow control becomes difficult to adjust properly
Solution Approach 1:
The gas supply control is segmented to match the physical segmentation of the cooking cavity. Each individual cooking cavity receives gas through a dedicated passage with its own flow rate modulating valve, making gas flow control as intuitive as the physical divider configuration.
Solution Approach 2:
Each cooking cavity is equipped with localized flow control capabilities through individual flow rate modulating valves. This allows independent adjustment of gas flow to each cavity based on its specific cooking requirements, rather than controlling the entire system from a single point.
3Reliability
If a Bi-metal ON/OFF valve is used, then safety is improved through sufficient heating/cooling, but reactivity is reduced
Solution Approach 1:
The mechanical Bi-metal valve system is replaced with a solenoid valve system that uses electromagnetic actuation. This substitution eliminates the need for thermal mass-based operation, providing immediate response when electrical control signals are applied, thus achieving both safety and high reactivity.
4Speed
If a solenoid ON/OFF valve is used, then reactivity is improved for immediate opening/shutting, but safety is reduced compared to Bi-metal valves
Solution Approach 1:
The solenoid valve system merges multiple safety functions into a single integrated control mechanism. The system combines immediate electrical response capability with automated flow rate modulation based on cooking cavity conditions, achieving both high reactivity and enhanced safety through coordinated control of multiple parameters.
Solution Approach 2:
The system incorporates feedback mechanisms that monitor cooking cavity conditions and automatically adjust gas flow rates through the solenoid valves. This closed-loop control ensures that the high reactivity of solenoid valves is paired with safety measures that respond to actual cooking conditions in real-time.
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 enables proper adjustment of gas flow to match changing cooking areas, reduces temperature fluctuations, and enhances safety by preventing explosive ignition and ensuring consistent cooking results.
Implementation Method 1
a coil configured to generate an electromagnetic force
Implementation Method 2
a restoring spring configured to elastically support the plunger
Implementation Method 3
a burner configured to generate heat by combusting gas and air
Data Source
AI summary
A gas oven having a gas supplying passage to supply gas to a burner is provided. The gas oven includes an ON/OFF valve to open/close the gas supplying passage, and a flow rate modulating valve connected to the ON/OFF valve in series so as to change the cross-sectional area of a passage, thereby supplying a proper amount of gas to a cooking cavity in response to the change of a cooking area. When a cooking cavity is divided into individual cooking cavities while a divider is mounted, the flow rate modulating valve is open/closed at a smaller opening degree than the maximum operating degree, and thus may be able to prevent a cooking substance from being carbonized in the individual cooking cavities.