Cooking oven with lighting device
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Solution Overview
Problem
Existing cooking ovens with lighting devices at the top wall often blind users due to direct light emission, as the light cone is not effectively controlled, leading to inadequate illumination within the oven cavity.
Innovation Solution
The top wall of the oven cavity features a combination of front and rear embossing and an inclined section, which directs the lighting device's light cone primarily towards the rear wall, preventing direct light emission through the front opening and optimizing light distribution within the cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the lighting device is arranged at the top wall of the oven cavity, then the illumination of the oven cavity is improved, but the user may be blinded by the direct light from the lighting device
Solution Approach 1:
The patent introduces an intermediary structure (the top wall with embossed portion and inclined section) between the lighting device and the user's field of view. This intermediary redirects the light path through reflection off the inclined section, causing light to travel toward the rear wall rather than directly toward the user, thus eliminating the blinding effect while preserving illumination function
Solution Approach 2:
The patent changes the spatial dimension of light propagation by using the inclined section to redirect light from a downward direction into a rearward direction. This dimensional change in light path orientation allows the same lighting device to illuminate the cavity without projecting light forward toward the user
2Illumination intensity
If the lighting device is positioned to illuminate the oven cavity effectively, then the light distribution is improved, but light may escape through the front opening and blind the user
Solution Approach 1:
The patent applies local quality modification by creating a specific geometric configuration (embossed portion with inclined section) at a localized area of the top wall. This local structural feature selectively controls light direction in the forward region while allowing effective illumination elsewhere in the cavity, preventing light escape through the front opening
3Illumination intensity
If the top wall structure is made complex to control light distribution, then the light control efficiency is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent merges the light control function directly into the top wall structure itself by forming the embossed portion and inclined section as integral features of the top wall. This merging eliminates the need for separate light control components, achieving effective light direction control while maintaining manufacturing simplicity through a single-piece construction
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 configuration ensures efficient illumination of the oven cavity without blinding the user, enhancing light distribution and production simplicity through a single-piece top wall design with reflective layers for increased light efficiency.
Implementation Method 1
In particular, a lower surface of the rear embossing 16 and/or the inclined section 12 are applied by a reflective layer. The reflective layers increase the light efficiency.
Data Source
Figure 1
Figure 2
AI summary
The present invention relates to a top wall for a casing of an oven cavity for a cooking oven. The top wall (10) includes an embossed portion for a lighting device (18, 20) of the oven cavity. The embossed portion (12, 14, 16) comprises a front embossing (14) extending downwards from a main plane of the top wall (10), a rear embossing (16) extending upwards from the main plane of the top wall (10), and an inclined section (12) arranged between the front embossing (14) and the rear embossing (16). A rear portion of the inclined section (12) is higher than a front portion of said inclined section (12). The inclined section (12) includes an opening provided for the lighting device (18, 20). Further, the present invention relates to a casing for an oven cavity of a cooking oven comprising said top wall (10). Additionally, the present invention relates to a cooking oven with an oven cavity including a casing with said top wall (10).