Exhaust fan
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Solution Overview
Problem
Indoor air quality is challenging to control due to poor air circulation and pollution sources like bacteria, fungi, and viruses, necessitating a solution for immediate purification and monitoring of indoor air quality to reduce harmful gases and improve breathing safety.
Innovation Solution
An exhaust fan integrated with an air guiding fan and filtering component, connected to a networking controller for real-time air pollution detection and filtration, which adjusts extraction rates to quickly purify indoor air by guiding polluted air through a filtering component, ensuring safe breathing conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional exhaust fans are used for air circulation, then air flow is provided, but air pollution cannot be effectively filtered and purified
Solution Approach 1:
The patent combines the exhaust fan, air guiding fan, and filtering component into a single integrated device. The main body houses both the exhaust fan for air circulation and the filtering component for pollution removal, while the air guiding fan is disposed in the airflow path to direct polluted air through the filter. This merging resolves the contradiction by providing both air flow and pollution filtration in one device without requiring multiple separate systems.
Solution Approach 2:
The exhaust fan device performs multiple functions: the exhaust fan provides air circulation and negative pressure, the air guiding fan directs airflow and guides polluted air to the filtering component, and the filtering component removes pollutants. This multi-functionality allows a single device to address both air circulation needs and pollution removal needs, resolving the contradiction between simple air flow provision and effective pollution filtration.
2Productivity
If air purification is implemented, then air quality improves, but response time for detecting and removing pollution is delayed
Solution Approach 1:
The air guiding fan is pre-positioned in the airflow path between the exhaust fan and filtering component, ready to immediately redirect airflow when pollution is detected. The networking controller is pre-configured to receive real-time air quality data and automatically activate the air guiding fan and adjust extraction rates without manual intervention. This preliminary preparation eliminates response delays by having the system ready to act instantly when pollution thresholds are exceeded.
Solution Approach 2:
The networking controller receives real-time air quality monitoring data and uses this feedback to automatically control the activation of the air guiding fan and adjust the extraction rate of the exhaust fan. This closed-loop feedback system ensures that purification actions are triggered immediately when pollution levels rise and adjusted in real-time based on current air quality conditions, resolving the contradiction between purification effectiveness and response speed.
3Productivity
If extraction rate is increased to purify air quickly, then purification speed improves, but energy consumption increases
Solution Approach 1:
The extraction rate of the exhaust fan is made dynamic rather than fixed. The networking controller adjusts the extraction rate in real-time based on air quality monitoring data, increasing power when pollution levels are high and reducing power when air quality is good. This dynamic adjustment resolves the contradiction by optimizing energy consumption to match actual purification needs rather than operating at constant high power.
Solution Approach 2:
The system changes the operational parameters (extraction rate, fan activation) based on detected air pollution levels. When pollution exceeds thresholds, the air guiding fan is activated and the exhaust fan's extraction rate is increased; when pollution levels are acceptable, these parameters are reduced or deactivated. This parameter adjustment based on real-time conditions resolves the contradiction between high purification efficiency and low energy consumption.
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 system effectively detects and purifies indoor air pollution in real-time, achieving safe breathing conditions by filtering out harmful pollutants such as particulate matter, CO2, TVOC, formaldehyde, bacteria, and viruses within 5 minutes, maintaining air quality below safety detection values.
Implementation Method 1
The air guiding fan is disposed in the airflow path, and operated to guide an air convection with an extraction rate of over 180 m3/h
Implementation Method 2
The filtering component is disposed in the airflow path and filters an air pollution in the air convection guided by the air guiding fan
Data Source
AI summary
An exhaust fan is disclosed and includes a main body, an air guiding fan, a filtering component, and a controller. The main body is configured to form an airflow path. The air guiding fan is disposed in the airflow path and is operated to guide an air convection with an extraction rate over 180 m3/h. The filtering component is disposed in the airflow path and filters an air pollution in the air convection guided by the air guiding fan. The networking controller receives a control command through wireless communication to perform an activation operation of the air guiding fan.