Downdraft Extraction Device Alignment Means to Reduce Vibration Noise
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Downdraft extraction devices experience vibration noises due to tolerances in the production line, which affect the arrangement of the cover element at the inlet opening, particularly when extracting cooking fumes from induction cooking hobs, and also impact the aesthetic design of the cooking hob.
Innovation Solution
The extraction device incorporates an alignment means with multiple components, including beveled edges and elastic materials, to center and stabilize the cover element at the inlet opening, ensuring a flush installation and reducing vibration noises while maintaining a smooth aesthetic design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cover element is arranged at the inlet opening using conventional alignment means, then the extraction device can function, but vibration noises occur due to production tolerances causing play in the arrangement
Solution Approach 1:
An elastic intermediate element (sealing ring) is introduced between the cover element and the inlet opening to absorb dimensional deviations and prevent direct contact with play, thereby eliminating vibration noises while maintaining functional reliability
Solution Approach 2:
The alignment means is changed from a rigid structure to an elastic structure that can deform within a defined range to compensate for dimensional deviations, transforming the parameter of rigidity to elasticity to eliminate play-induced vibrations
2Object-affected harmful factors
If the cover element is tightly fitted at the inlet opening to eliminate play, then vibration noises are reduced, but the aesthetic design of the cooking hob surface is compromised
Solution Approach 1:
The sealing function is localized to the elastic intermediate element at the contact interface, while the cover element itself maintains a smooth, aesthetically pleasing surface that integrates with the cooking hob design, separating functional and aesthetic requirements to different locations
3Device complexity
If conventional alignment means are used, then the device structure remains simple, but the arrangement of the cover element has play causing operational issues
Solution Approach 1:
A flexible elastic intermediate element (sealing ring) is used instead of complex rigid alignment mechanisms, providing reliable centering and sealing through elastic deformation while maintaining structural simplicity
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 solution effectively minimizes vibration noises and enhances the aesthetic appeal of the cooking hob by ensuring precise alignment and secure fitment of the cover element, compensating for production tolerances and providing a stable operation during cooking processes.
Implementation Method 1
at least one of the first, second and third component is made of an elastic material, wherein the elastic material is deformable in at least one direction
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention is related to an extraction device (14) for removing air from an area above a cooking hob (12). The extraction device (14) comprises an inlet opening (24) for an intake of the air into an interior of the extraction device (14), a cover element (26), which is arranged at the inlet opening (24), and at least one alignment means (60, 60', 72). According to the invention, the alignment means (60, 60', 72) comprises at least a first component for centring the cover element (26) with the inlet opening (24), wherein the at least first component is arranged, continuously or discontinuously, at or next to a rim or edge of the inlet opening (24) and/or a rim or edge of the cover element (26).