Filter unit for a fume extraction device, and combination appliance having a cooktop and a fume extraction device having a filter unit
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Solution Overview
Problem
Existing fume extraction systems face challenges in effectively filtering both contaminants and liquids from cooking fumes, as liquids can penetrate the filter material and cause damage to the blower, and current designs do not efficiently manage large quantities of liquid.
Innovation Solution
A filter unit with a collecting region for liquids that is separate from the filter material, featuring an air inlet and outlet, and an overflow mechanism to divert excess liquids, ensuring that liquids do not enter the filter material and protecting the blower.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter element is arranged in the exhaust channel system to filter contaminants and liquids, then filtering effectiveness is improved, but liquids can still penetrate the filter material and reach the vacuum source causing damage
Solution Approach 1:
A collection trough is introduced as an intermediary component between the filter element and the vacuum source. The trough receives liquids that penetrate through the filter material and redirects them away from the vacuum source, preventing direct contact and potential damage to the vacuum pump.
Solution Approach 2:
The collection trough is positioned and designed to preemptively intercept liquids before they can reach the vacuum source. By creating a preliminary barrier and collection mechanism, the system prevents the harmful effect of liquid ingress to the vacuum pump before it can occur.
2Quantity of substance
If the collection trough is designed to receive liquids, then liquid collection capacity is improved, but when the filling state exceeds the trough height, liquid will again penetrate into the filter material
Solution Approach 1:
An overflow channel is introduced as a third dimensional pathway (vertical overflow direction) to handle excess liquid when the collection trough becomes full. This additional dimension allows liquid to be safely redirected when the primary horizontal collection capacity is exceeded, preventing liquid from penetrating back into the filter material.
Solution Approach 2:
The overflow channel is pre-configured at a specific height above the collection trough to automatically activate when liquid reaches that level. This preliminary arrangement ensures that before liquid can penetrate back into the filter material, the overflow mechanism is already in place to redirect the excess liquid safely.
3Productivity
If liquid is allowed to pass through the filter element to the trough, then the filter can handle liquid flow, but the filter element becomes clogged and filtering effectiveness decreases
Solution Approach 1:
The harmful liquid component is extracted and separated from the air stream at the filter element surface, where it accumulates in the collection trough. By continuously removing liquid from the filter surface, the filter element maintains its filtering effectiveness while still handling liquid flow, preventing clogging and performance degradation.
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 filters contaminants and liquids, preventing damage to the blower and ensuring reliable cleaning of fumes and vapors by separating liquids from the filter material and directing them to a collecting region, thus enhancing the operational efficiency and longevity of the fume extraction system.
Implementation Method 1
a filter unit is designed both to filter contaminants and liquids from fumes and vapors
Implementation Method 2
a collecting region for liquids is provided, which is not covered by the filter material of the filter element
Implementation Method 3
having at least one overflow which is spaced apart from the filter element
Data Source
AI summary
A filter unit for a fume extraction device includes a filter body having a filter element and a collecting region which is situated below the filter body and at least partially surrounds the filter body for collecting a liquid. An upper region of the filter unit is formed with an air inlet opening to let in air that is suctioned by the fume extraction device, with the air inlet opening at least partially surrounding the filter body. A bottom side of the filter unit is provided with an air outlet opening to let air out of the filter unit to the fume extraction device.