Pull-Out Cooker Hood Venting with Stationary Filters
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Solution Overview
Problem
Existing cooking fume extraction hoods have complex constructions with moving filter means that can foul each other, leading to poor maintenance and reduced effectiveness in keeping the extraction chamber clean.
Innovation Solution
A cooking fume extraction hood with a simplified pull-out drawer structure, where the filter means are stationary and not placed on the pull-out portion, ensuring that the interior of the extraction chamber remains clean.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If filter means are attached to the sliding drawer to be moved with the pull-out portion, then the drawer structure can be simplified, but the filter means will rub against each other and foul each other during sliding
Solution Approach 1:
The hood is divided into two functional parts: a stationary main body containing the filter means and suction unit, and a movable pull-out drawer containing only the vent opening. This segmentation allows the filter means to remain fixed while the drawer moves independently, eliminating the fouling problem while maintaining structural simplicity.
Solution Approach 2:
Instead of attaching filters to the moving drawer as in prior art, this invention inverts the arrangement by placing the filters in the stationary main body and moving only the vent opening on the drawer. This reversal of the conventional arrangement solves the fouling issue while achieving the desired simplicity.
2Adaptability or versatility
If the sliding drawer alternates between pulled-out and retracted configurations, then the vent opening can be exposed or closed, but the filter means will be displaced and potentially foul each other
Solution Approach 1:
The system is segmented into a stationary filtration section and a movable venting section. The filter means remain fixed in the main body while only the vent opening on the drawer moves, eliminating the need for complex filter displacement mechanisms while maintaining adaptability.
Solution Approach 2:
The vent opening function is extracted from the main body and placed on the movable drawer, while the filter means remain in the stationary main body. This separation allows independent movement of the vent opening without affecting the filter position, simplifying the overall mechanism.
3Device complexity
If filter means are moved with the sliding drawer, then the construction can be simpler, but the interior of the extraction chamber cannot be kept clean
Solution Approach 1:
The invention inverts the conventional arrangement by keeping the filter means stationary in the main body while placing the vent opening on the movable drawer. This reversal ensures that the extraction chamber interior remains clean and free from fouling while maintaining construction simplicity.
Solution Approach 2:
The stationary main body acts as an intermediary that houses the filter means and protects them from fouling, while the movable drawer serves as a separate component that provides venting functionality without contaminating the extraction chamber interior.
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 simplified design maintains the cleanliness of the extraction chamber, preserving the integrity of odor filters and suction unit components, while reducing the complexity of construction and maintenance.
Implementation Method 1
suction means configured to generate a suction flow
Data Source
Figure 1
Figure 2a~2b
Figure 3~3a
AI summary
A cooking fume extraction hood (1) comprises a main body (2) configured to be fixed to a wall and having an intake opening (3) designed to face a cooktop to draw in cooking fumes; suction means (4) in fluid communication with the intake opening (3); filter means (8) located between the intake opening (3) and the suction means (4); a vent opening (12) located downstream of the suction means (4), the vent opening (12) being configured to vent filtered fumes directly into the environment and away from the cooktop; a pull-out portion (9) which is able to slide relative to the main body (2) and has a bottom wall (11) facing the cooktop and a top wall (10) opposite to the bottom wall (11), the vent opening (12) being situated on the top wall (10) of the pull-out portion (9); the suction means (4) are housed in the main body (2).