Oven Door Cooling Duct Snap-Fit Assembly for Cleaner Glass
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Solution Overview
Problem
Modern household cooking ovens face issues with the outermost glass pane reaching excessive temperatures, leading to safety concerns, and existing cooling systems are costly, require manual welding, and result in greasy air fouling the panes, making cleaning difficult.
Innovation Solution
A cooling system for cooking ovens featuring a tangential fan-driven delivery duct made of plastic with snap-coupling fixing means, which is economical to produce, easy to assemble and disassemble, and maintains effective thermal insulation and visibility, with separate air flows to prevent fouling and enhance cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metallic delivery duct is used in the cooling system, then the cooling effectiveness is improved, but the manufacturing cost increases and manual welding is required
Solution Approach 1:
The patent replaces expensive metallic delivery ducts with inexpensive plastic alternatives that can be manufactured through injection molding. The plastic duct is designed as a single-use or replaceable component that eliminates the need for costly metal fabrication and welding operations, while still maintaining adequate cooling functionality.
Solution Approach 2:
The patent substitutes the mechanical welding process with a snap-fit or clips-based assembly mechanism. The plastic delivery duct incorporates integrated fixing elements that mechanically engage with mounting points on the oven structure, eliminating the need for thermal welding processes and reducing assembly complexity.
2Device complexity
If air is taken from the oven muffle for cooling, then the cooling system is simplified, but the panes become fouled with grease and oil
Solution Approach 1:
The patent divides the air flow paths into separate segments: one path draws ambient air from the oven cavity for cooling the door panes, while another path handles the extraction of greasy air from the muffle interior. This segmentation prevents contaminated muffle air from contacting the panes, eliminating fouling while maintaining system simplicity.
Solution Approach 2:
The patent introduces an intermediary cleaning element or filter in the air path that separates clean cooling air from the greasy muffle environment. This intermediary component allows the cooling function to be performed using clean air while the greasy air is routed separately for extraction, preventing direct contact between contaminants and the panes.
3Device complexity
If the panes are secured to the door, then the door structure is simplified, but cleaning operations become complex and difficult
Solution Approach 1:
The patent segments the door assembly into separable components: the panes remain permanently mounted to the door frame for structural simplicity, while the delivery duct and associated cooling components are designed as removable modules. This allows maintenance personnel to access and clean the panes by removing the duct assembly without disassembling the entire door structure.
Solution Approach 2:
The patent introduces dynamic accessibility to the door structure through removable or detachable components. The delivery duct is designed with quick-release mechanisms that allow it to be easily removed for pane cleaning operations, providing temporary structural change that facilitates maintenance while maintaining structural integrity during normal operation.
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 provides efficient thermal insulation and cooling of the outer surface, reduces the risk of accidental contact, and simplifies maintenance by eliminating the need for manual welding and complex cleaning operations.
Implementation Method 1
a cooling system comprising a fan and a delivery duct adapted to blow air into said interspace
Implementation Method 2
at least a first and a second panes adapted to define an interspace, so as to reduce the transfer of heat from the oven to the outermost pane
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
The present invention relates to a cooking oven (1), in particular for household use, of the type comprising:a cabinet (2) comprising a muffle (3) adapted to be closed by a door (4), a first (5A) and a second (5B) panes adapted to create at least a first interspace (6A) in said door (4), a cooling system (10) comprising a fan (11) and a delivery duct (12) adapted to blow a forced air flow into said first interspace (6A). The invention is characterized in that said cooking oven (1) comprises fixing means (100) for snap-coupling the delivery duct (12) to a plate (50), the latter being in particular adapted to be coupled to the bottom of said delivery duct (12).