Hood for cooking fumes extraction having a link hinge with a closure panel
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Solution Overview
Problem
Existing hoods for cooking fumes suction suffer from airflow hindrance and aesthetic issues due to hinge placement at corners, which obstructs airflow and visibility, and are not functional in closed configurations.
Innovation Solution
A hood design with hinges positioned at intermediate positions between 10% and 90% of the panel's length, featuring a slider system that allows rotation and concealment, enabling improved airflow and aesthetic appeal by positioning the hinges internally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hinges are placed at the corners of the panel, then the panel can be easily connected to the main body, but the hinges partially hinder the air flow passing through the opening resulting in swirl and noise
Solution Approach 1:
The hinge is positioned asymmetrically at an intermediate location on the panel rather than at the corner, specifically at a point that is not equidistant from the panel edges. This asymmetric placement moves the hinge away from the airflow path while maintaining connection functionality.
Solution Approach 2:
The hinge is placed at a specific local region of the panel (intermediate position between 10-90% of panel length from one edge) where it does not interfere with airflow. This local positioning optimizes both connection ease and airflow performance by selecting a specific zone on the panel that satisfies both requirements.
2Device complexity
If hinges are placed at the corners of the panel, then the connection structure is simple, but the hinges are visible from outside even when the panel is closed, compromising its appearance
Solution Approach 1:
The hinge is positioned asymmetrically at an intermediate location on the panel rather than at the corner, specifically at a point that is not equidistant from the panel edges. This asymmetric placement moves the hinge away from the airflow path while maintaining connection functionality.
Solution Approach 2:
The hinge is placed at a specific local region of the panel (intermediate position between 10-90% of panel length from one edge) where it does not interfere with airflow. This local positioning optimizes both connection ease and airflow performance by selecting a specific zone on the panel that satisfies both requirements.
3Ease of operation
If the panel obstructs completely the opening in closed configuration, then maintenance access is achieved, but the hood cannot suck cooking fumes in the closed configuration
Solution Approach 1:
The panel is designed to be dynamic, capable of rotating between a closed position (for maintenance access) and an open position (for fume suction). The hinge enables this dynamic reconfiguration, allowing the panel to transition between different functional states as needed.
Solution Approach 2:
The opening is partially covered by the panel, which can be segmented into different operational positions. The panel does not completely block the opening even in closed configuration, allowing partial airflow while providing maintenance access, or can be fully opened to restore complete suction capability.
Data Source
Figure 1
Figure 2a~2b
Figure 2c
AI summary
A hood (1) for the suction of cooking fumes, comprising a main body (2) having an opening (3) that can face a cooking hob for the suction of cooking fumes; a panel (4) connected to the main body (2) and placed at the opening (3) for partially covering it; at least a hinge (5) connected to the panel (4) and to the main body (2) and configured to allow the rotation of the panel (4) with respect to the main body (2) to make the inside of the main body (2) accessible through the opening (3), the hinge (5) comprising a fixed portion (6) connected to the main body (2) and a movable portion (8) connected to the panel (4) and configured to rotate with respect to the fixed portion (6) about an axis of rotation (A); the movable portion (8) comprises a guide (10), a slider (11) that is slidable along the guide (10) and fixed to the panel (4) to make it slide along the guide (10).