Ventilation fan and ventilation system
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Solution Overview
Problem
Conventional ventilation fans require multiple sensors and configurations for different environments, leading to increased production and management costs, and often necessitate replacement of the entire unit when sensor types change.
Innovation Solution
A modular ventilation fan system with a body unit and interchangeable sensor modules, where the sensor module controller outputs detection information to the fan controller, allowing for flexible sensor configuration and reduced costs by enabling the use of various sensors without changing the fan's body unit specification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple types of ventilation fans are produced to match different sensor types and installation environments, then the adaptability to different environments is improved, but the production cost and management cost increase
Solution Approach 1:
The ventilation fan is divided into a body unit and a separate sensor module. The sensor module can be detached and replaced independently from the body unit, allowing different sensor modules to be mounted on the same body unit to match different installation environments and sensor requirements, thereby reducing the need to produce multiple complete fan models.
Solution Approach 2:
The body unit is designed with a universal mounting structure (module mount) that can accommodate various types of sensor modules. This universal design allows a single body unit specification to work with multiple sensor types (temperature, humidity, illuminance, human body detection), reducing production complexity while maintaining environmental adaptability.
2Adaptability or versatility
If the sensor type must be changed after installation, then the adaptability to different environments is improved, but the entire ventilation fan must be replaced, increasing management cost and time
Solution Approach 1:
The sensor module is segmented as a separate, detachable component from the body unit. This segmentation enables the sensor module to be replaced independently without replacing the entire ventilation fan, significantly reducing management cost and replacement time when sensor type changes are required.
Solution Approach 2:
The system is designed to be dynamically reconfigurable by allowing the sensor module to be easily detached and reattached to the module mount on the body unit. This dynamic design enables flexible adaptation to different environmental requirements without permanent modification or complete replacement of the ventilation fan.
3Difficulty of detecting and measuring
If various sensors are integrated into the fan body, then the detection capability is improved, but the device complexity increases
Solution Approach 1:
The detection system is segmented into separate sensor modules, each containing specific indoor environment detecting sensors (temperature, humidity, illuminance, human body detection). This segmentation simplifies the overall device complexity by allowing sensors to be modularized and selectively installed based on detection requirements, rather than integrating all sensors into a complex unified structure.
Solution Approach 2:
The module mount acts as an intermediary interface between the body unit and the sensor module. This intermediary structure simplifies the connection and integration process, enabling easy attachment and detachment of sensor modules without complex wiring or integration procedures, thereby reducing device complexity while maintaining detection capability.
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.