Oven Ventilation Channel With Constant Airflow for Door Cooling
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Solution Overview
Problem
Domestic cooking ovens face inefficiencies in ventilation due to air flow divergence after outlet, leading to reduced cooling performance and increased heating of components, including the door and exterior glass, posing safety risks and aesthetic issues.
Innovation Solution
A cooking oven design featuring a ventilation channel with a constant air flow section height, utilizing an air deflection zone with a crosspiece and air deflector to direct airflow away from the door handle and exterior glass, preventing looping and turbulence, and ensuring efficient airflow direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the ventilation channel allows air flow to diverge after outlet, then the air flow can naturally disperse, but the cooling performance is reduced and heating of components increases
Solution Approach 1:
An air deflection zone is introduced as an intermediary structure between the ventilation channel outlet and the external environment. This deflection zone, formed by the crosspiece and air deflector, guides the air flow in a specific direction to prevent it from contacting heat-sensitive components like the door handle and exterior glass, thereby resolving the contradiction between natural dispersion and targeted cooling.
2Productivity
If the air flow is allowed to loop inside the door and oven, then the ventilation system recirculates air, but the air is heated by passage inside the ventilation device and is not fresh air from outside
Solution Approach 1:
The air deflection zone extracts and redirects the air flow immediately after it exits the ventilation channel, preventing it from entering the door cavity and looping back into the ventilation system. By taking out the air flow from the potential recirculation path and directing it outward, the invention ensures that only fresh air from outside enters the ventilation device, eliminating heated air recirculation.
3Productivity
If the air flow contacts the door handle and exterior glass, then the ventilation covers these components, but significant heating on these components is observed
Solution Approach 1:
The air deflector acts as an intermediary element that intercepts the air flow before it can contact the door handle and exterior glass. By introducing this deflection mechanism, the air flow is redirected in a controlled manner, maintaining ventilation coverage while preventing harmful thermal contact with sensitive components.
4Productivity
If the ventilation channel opening is visible on the front face, then the air flow can discharge properly, but aesthetic issues arise
Solution Approach 1:
The crosspiece and air deflector form an intermediary structure that conceals the ventilation channel opening from the front face view. These elements are positioned to block the visual appearance of the opening while simultaneously maintaining proper air flow discharge functionality, thus resolving the contradiction between aesthetic appearance and ventilation performance.
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
This design enhances ventilation efficiency, reduces component heating, ensures user safety by preventing burns, and improves oven aesthetics by hiding the ventilation channel opening.
Implementation Method 1
an air deflection zone, the air deflection zone being at least formed outside the baking oven and from the front face of said oven
Implementation Method 2
The air circulation is generated by a fan creating a vacuum in the upper part of the door either by direct suction or by a venturi effect
Implementation Method 3
ventilation creating flows of cooling air circulating between the different door windows, to limit the rise in temperature of the door
Data Source
Figure 1
Figure 1Bis
Figure 2
AI summary
The kiln (1) has a cooking chamber (2) with an opening (26) in a front face (3) closed by a door (4), where the chamber is surrounded by a case (5). A ventilation device (10) has a ventilation channel (12) channeling an air flow (F), where the channel is placed between the chamber and the case. The door has an inner glass (25) opposite to the opening of the chamber and an outer glass (21) positioned towards exterior of the kiln. The flow (F) has a passage section with a height that is constant on a blowing zone (73) of the channel and on an air deflection zone (72).