Central Downdraft Hob Layout for Cooking Vapor Capture
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Solution Overview
Problem
Existing hobs with suction slits on both sides and back are inefficient due to canceled suction flows, high manufacturing and maintenance costs, noise, and limited countertop usage, as they require separate mounting frames and three grease filters, leading to ineffective vapor removal and energy expenditure.
Innovation Solution
A hob design featuring recesses only around its geometric center, connected to devices that remove cooking vapors vertically downward, allowing for efficient suction without obstructing countertop space, reducing manufacturing and maintenance costs, and minimizing noise through centralized suction and compact assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If suction slits are provided on both sides and on the back of the hob, then cooking vapors can be removed through suction, but the suction flows cancel each other out in the central area, allowing vapors to rise unimpeded
Solution Approach 1:
The patent applies asymmetry by providing suction slits only on the back and one side of the hob, rather than symmetrically on all sides. This asymmetric arrangement prevents the cancellation of suction flows that occurs when slits are placed on both sides, ensuring effective vapor removal in the central cooking area while maintaining balanced airflow dynamics.
Solution Approach 2:
The patent utilizes the vertical dimension by directing suction flows downward through the hob structure. The back and side slits are configured to create downward-directed suction flows that converge in the central area, effectively capturing rising vapors by drawing them down through the hob rather than allowing them to rise unimpeded.
2Object-affected harmful factors
If suction slits are provided on both sides and on the back of the hob, then cooking vapors can be removed, but the countertop surfaces cannot be completely used for temporary storage
Solution Approach 1:
By placing suction slits only on the back and one side of the hob rather than all sides, the patent minimizes the obstruction of countertop surfaces. This asymmetric configuration removes vapor effectively while leaving the front and one side surfaces of the hob free for temporary storage and kitchen activities.
3Object-affected harmful factors
If three suction devices are used with slits on both sides and back, then vapor removal is attempted, but manufacturing and material costs increase markedly
Solution Approach 1:
The patent extracts the unnecessary suction devices by reducing the number of suction slits from three (back, left side, right side) to two (back and one side only). This reduction eliminates the need for one entire suction device and its associated grease filter, thereby lowering manufacturing and material costs while maintaining effective vapor removal through the optimized asymmetric configuration.
4Reliability
If three grease filters are installed in the hob, then all suction slits can be maintained, but maintenance costs become especially high
Solution Approach 1:
The patent removes one grease filter by reducing the number of suction slits from three to two. This extraction of the unnecessary filter component directly reduces maintenance costs and the frequency of maintenance tasks, while the remaining two filters on the back and one side continue to maintain suction system functionality effectively.
5Object-affected harmful factors
If strong suction flows are released through all suction slits simultaneously, then vapor removal is achieved, but energy expenditure becomes especially high
Solution Approach 1:
The asymmetric arrangement of suction slits on the back and one side only allows for more efficient energy utilization. With fewer slits to maintain, the suction system can concentrate airflow through the two strategic locations, achieving effective vapor removal with lower energy expenditure compared to activating three slits simultaneously across all sides.
6Reliability
If a separate mounting frame is used to secure the hob, then the cooking vapor suction slits can be bridged, but assembly becomes material and time-intensive
Solution Approach 1:
The patent reduces the complexity of assembly by removing the requirement for a separate mounting frame. With fewer suction slits and a simplified configuration, the hob can be installed more directly without the additional material and time-intensive framing structure, thereby reducing assembly time while maintaining mounting stability.
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 design ensures effective vapor removal without rising vapors, lowers manufacturing, assembly, and maintenance costs, enhances energy efficiency, and reduces noise, while allowing full countertop usage and simplified assembly.
Implementation Method 1
devices for removing cooking vapors through suction downwardly to remove the cooking vapors that arose or arise above the cooking locations by suction in a direction pointing vertically below the hob
Data Source
AI summary
A hob (1) with one or more cooking locations (2), which, as viewed from above, exhibits one or more recesses (4) only in the area (25) around its geometric center (3), which are respectively connected with one or more devices (5) for removing cooking vapors through suction. These devices (5) for removing cooking vapors through suction downwardly remove the cooking vapors that arise above the cooking locations (2) by suction in a direction vertically below the hob (1), and such a hob (1), which in the assembly unit is designed with a device (36) for operating the hob (2) and downwardly removing cooking vapors by suction.