Vented Oven Door Channels for Cooling Without Cavity Heat Loss
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Solution Overview
Problem
Existing vented oven doors for domestic cooking ovens suffer from inefficient cooling, leading to reduced cooking performance and high energy consumption, as they often cool the oven cavity excessively, affecting the inner glass panel and the cooking process.
Innovation Solution
The oven door design features a configuration where the upper opening of the inner door channel is connected to the ambient and the exhaust of the cooling channel, enabling forced heat convection in the outer door channel and entrainment of the inner air stream by the cooling air stream, preventing excessive cooling of the inner side and optimizing energy usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If forced convection is applied to cool the inner glass panel, then cooling efficiency is improved, but energy consumption increases
Solution Approach 1:
Forced convection via the cooling channel is applied locally only to the outer door channel where it is most needed for safety. The inner door channel uses natural convection, which consumes no additional energy, thereby maintaining high cooling efficiency for the outer surface while minimizing overall energy consumption.
Solution Approach 2:
The outer air stream from the cooling channel acts as an intermediary that indirectly cools the inner glass panel through the door structure and natural convection in the inner channel, rather than directly forcing cool air into the inner channel. This mediator approach reduces energy consumption while still achieving the cooling effect.
2Productivity
If the inner door channel is sealed to prevent cavity cooling, then cooking performance is maintained, but the inner glass panel overheats
Solution Approach 1:
The door is segmented into two independent cooling channels that can operate simultaneously with different cooling intensities. The inner door channel remains open to allow natural convection cooling of the inner glass panel without significantly affecting the oven cavity temperature, thus preventing overheating while maintaining cooking performance.
Solution Approach 2:
The cooling parameters for the inner and outer channels are changed differently: the outer channel receives high-intensity forced convection with high flow rates, while the inner channel uses low-intensity natural convection with lower flow rates. This parameter differentiation allows the inner glass panel to be cooled sufficiently without compromising cooking 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 cooling efficiency for the outer portion of the oven door while maintaining the inner side's temperature, thereby improving cooking performance and reducing energy consumption.
Implementation Method 1
The cooling channel sucks cool air from the ambient through the inner space of the oven door... the cooling channel may be arranged on the top wall of the oven cavity and the cool air streams upwards through the inner space of the oven door
Implementation Method 2
at least one upper opening of at least one inner door channel is connected or connectable to the ambient on the one hand and an exhaust of the cooling channel on the other hand in the closed state of the oven door, so that an inner air stream from the inner door channel is entrained by the air from the exhaust and runs into the ambient
Implementation Method 3
There is heat radiation from the surfaces of the inner glass panel, heat convection within the inner space of the oven door and heat conduction within the glasses of the glass panels
Implementation Method 4
heat convection within the inner space of the oven door
Implementation Method 5
heat conduction within the glasses of the glass panels
Data Source
Figure 1~2
AI summary
The present invention relates to a vented oven door for a domestic cooking. The oven door (10) comprises at least three glass panels (12, 14, 16). The inner space of the oven door (10) is subdivided into at least two door channels (18, 20) by the at least three glass panels (12, 14, 16). At least one upper opening of at least one outer door channel (18) is connected or connectable to a suction (24) of a cooling channel with air moving means in a closed state of the oven door (10). At least one upper opening of at least one inner door channel (20) is connected or connectable to the ambient on the one hand and an exhaust (26) of the cooling channel on the other hand in the closed state of the oven door (10), so that air from the inner door channel (20) is entrained by the air from the exhaust (26). Further, the present invention relates to a corresponding cooking oven.