Gas Oven Exhaust Vent Damper for Heat Loss and Combustion Balance
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Solution Overview
Problem
Conventional gas ovens face inefficiencies due to oversized exhaust vents, which compromise energy efficiency during steady-state baking operations while being oversized for broil and cold-start conditions, leading to excess heat loss and suboptimal combustion.
Innovation Solution
A temperature-reactive damper system that adjusts the exhaust vent opening size based on operational modes, using a bimetal device or electromechanical actuator to change the vent opening area in response to temperature changes, ensuring optimal venting for broil and bake operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the exhaust vent cross-sectional area is oversized to compensate for reduced stack height during broil mode and warm-up period, then combustion performance during broil and warm-up conditions is improved, but heat loss increases and energy efficiency decreases during steady-state bake operations
Solution Approach 1:
The patent applies a temperature-reactive damper member that dynamically adjusts the exhaust vent opening size based on oven temperature. During warm-up and broil modes, the damper remains open to provide a large vent area for adequate combustion. During steady-state bake operations, the damper closes to reduce the vent area and minimize heat loss, thus resolving the contradiction between combustion performance and energy efficiency.
Solution Approach 2:
The patent changes the physical parameter of vent opening area based on operating conditions. The damper member transitions between open and closed states, altering the effective vent area from large (during warm-up/broil) to small (during steady-state bake), thereby optimizing both combustion performance and energy efficiency under different operational parameters.
2Device complexity
If a one-size vent is used for all operating conditions, then the design is simple, but the vent cannot provide optimum performance for all operating conditions including broil, bake, and warm-up modes
Solution Approach 1:
The patent transforms the static vent design into a dynamic system by incorporating a temperature-reactive damper member. This allows the vent to automatically adapt its opening size based on real-time temperature conditions, providing optimized performance for broil, bake, and warm-up modes while maintaining relatively simple design through the use of a passive thermal response mechanism.
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 damper system improves energy efficiency by reducing heat loss and maintaining proper combustion, adjusting vent size dynamically to suit broil, bake, and cold-start conditions, enhancing overall oven performance.
Implementation Method 1
a temperature-reactive member configured to control a size of an exhaust vent opening to the exhaust from the gas operated oven
Implementation Method 2
using a bimetal device or electromechanical actuator to change the vent opening area in response to temperature changes
Data Source
AI summary
A damper system for an exhaust vent of a gas operated oven includes a temperature-reactive member configured to expand when actuated by heating to a predetermined temperature, and a damper member coupled to the temperature-reactive member, the damper member configured to move with the expansion of the temperature-reactive member to control a size of an opening to the exhaust vent from the gas operated oven.