Ventilation fan and ventilation system
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Solution Overview
Problem
Conventional ventilation fans require different sensors based on installation environments, leading to increased production and management costs due to the need for various sensor types and potential replacement of entire units when sensor types change.
Innovation Solution
A modular ventilation fan design with a body unit and sensor module that allows for easy replacement of sensors, including human body, temperature, humidity, and illuminance sensors, with a fan controller that adjusts air volume based on sensor data, and a system where multiple fans communicate to maintain constant ventilation air volume in a building.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different types of sensors are installed for different installation environments, then the ventilation fan can adapt to various environments, but the production cost and management cost increase
Solution Approach 1:
The sensor module is separated from the main fan body and designed as an independent, replaceable component. This segmentation allows the sensor module to be customized for different environments while the main fan body remains standardized, reducing production complexity and costs.
Solution Approach 2:
The standardized module mount on the fan body can accommodate multiple types of sensor modules (human body sensor, temperature sensor, humidity sensor, illuminance sensor). This universal interface design allows a single fan model to serve multiple installation environments without requiring different fan bodies.
2Adaptability or versatility
If the sensor type needs to be changed after installation, then the ventilation fan can be adapted to new requirements, but the entire ventilation fan must be replaced
Solution Approach 1:
The sensor module is designed as a separate, independently replaceable component that can be removed and replaced without affecting the main fan body. This segmentation enables cost-effective sensor replacement by allowing users to swap only the sensor module rather than the entire fan unit.
Solution Approach 2:
The sensor module is extracted as a distinct functional unit from the fan system. This extraction allows the sensor module to be independently replaced, upgraded, or modified without requiring replacement of the entire ventilation fan, significantly reducing replacement costs.
3Area of stationary object
If multiple ventilation fans are installed in a building, then the ventilation coverage is improved, but the total ventilation air volume may exceed requirements causing energy loss
Solution Approach 1:
Each ventilation fan is equipped with sensors that detect environmental conditions (presence of humans, temperature, humidity, illuminance) and provide feedback to the control system. The control system uses this feedback to dynamically adjust the air volume of each fan, ensuring the total ventilation air volume matches the actual building requirements and avoiding energy waste from excessive ventilation.
Solution Approach 2:
The ventilation system transitions from static, fixed air volume operation to dynamic, adjustable air volume control. Each fan's air volume can be independently adjusted based on real-time sensor data and communication with other fans, allowing the system to adapt to changing building conditions and optimize energy efficiency.
Data Source
AI summary
A ventilation fan includes a body unit, which has a fan disposed in a body case and a fan controller operable to control an air volume of the fan. The ventilation fan also includes a sensor module having an indoor environment detecting sensor and a module controller operable to control a detecting operation of the indoor environment detecting sensor. The body unit has a module mount on which the sensor module is mounted and another sensor module can be mounted in place of the sensor module. The module mount is connected to the fan controller. The module controller outputs detection information obtained based on a detection result of the indoor environment detecting sensor to the fan controller, which in turn controls the air volume of the fan based on the detection information inputted thereto.