Cooker Hood Filter State Detection Without Flow Sensors
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Solution Overview
Problem
Existing cooker hood filter cleaning notifications based on flow sensors are unreliable over time due to sensor dirtiness and fail to differentiate between the need for cleaning and replacement, often leading to unnecessary maintenance.
Innovation Solution
A cooker hood system that uses existing sensors like temperature, air quality, and humidity sensors, along with food recognition capabilities, to evaluate the dirtiness of the filter based on cooking activities, eliminating the need for flow sensors and providing tailored cleaning reminders adapted to the type of aspiration and food cooked.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If filter cleaning notifications are provided based on fixed operation time, then users receive regular reminders, but unnecessary cleaning is triggered when not really needed
Solution Approach 1:
The patent implements feedback mechanisms using existing sensors to continuously monitor actual filter conditions and adjust cleaning notifications accordingly, providing feedback on real filter state rather than relying on fixed time schedules
Solution Approach 2:
The patent changes the parameters used for cleaning notification from fixed time-based parameters to dynamic parameters based on actual filter condition indicators (temperature, humidity, air quality changes), allowing adaptive notification timing
2Measurement precision
If flow sensors are used to detect air flow through the hood, then cleaning reminders can be triggered, but the sensors get dirty and are not reliable along time
Solution Approach 1:
The patent extracts the flow sensor from the system and replaces air flow detection with measurements of other parameters (temperature, humidity, air quality) that do not require direct exposure to dirty air streams
Solution Approach 2:
The patent substitutes mechanical flow sensors with environmental sensing systems that measure temperature, humidity, and air quality parameters, replacing direct mechanical flow measurement with indirect environmental monitoring
Data Source
AI summary
A cooker hood is disclosed including a fan unit for extracting cooking vapours, a filter unit for filtering cooking vapours, and a first detecting unit for detecting, in particular sensing, a first series of first operating states, in particular indicators for hood rotational states. The cooker hood further includes a second detecting unit for detecting, in particular sensing, a second series of second operating states, in particular indicators for air dirtiness states, of or at the hood. The cooker hood further includes an evaluation unit for evaluating third operating states, in particular filter states, based at least on the first series of first operating states and the second series of second operating states of the hood. Still further, cooker hood includes a notification unit, in particular display unit, for indicating or triggering a notification, in particular a filter cleaning or replacement notification or reminder, based on the third operating states.