Filter-Aware Fan Speed Control for Stable Air Supply
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Solution Overview
Problem
Air supply devices, such as fresh air machines and air conditioners, face issues with excessive noise or insufficient air volume due to mismatched fan speeds with filter assemblies, leading to inadequate airflow resistance matching.
Innovation Solution
A control method and device that automatically detect the type of filter assembly installed and adjust the fan speed to a preset rotating speed matching the filter assembly's resistance, ensuring optimal airflow without excessive noise or insufficient volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If fans rotate at fixed speed, then the structure is simple and easy to control, but the output air volume becomes inconsistent leading to excessive noise or insufficient airflow
Solution Approach 1:
The patent applies dynamics by making the fan rotating speed adjustable rather than fixed. The control unit dynamically changes the fan speed based on the detected filter assembly type, matching the fan rotation speed to different resistance values of different filter assemblies, thereby resolving the contradiction between simple control structure and consistent output air volume.
2Adaptability or versatility
If multiple filter assemblies with different resistance are mounted, then filtering needs are met, but the fixed fan speed causes mismatch leading to noise or insufficient air volume
Solution Approach 1:
The patent applies feedback by using a detection assembly to detect the type of mounted filter assembly and feed this information back to the control unit. The control unit then adjusts the fan rotating speed according to the detected filter type, ensuring the fan speed matches the resistance of the mounted filter assembly, thus resolving the mismatch problem while maintaining filtering versatility.
3Productivity
If fan speed is increased to compensate for high resistance filter, then airflow through high resistance filter improves, but noise increases excessively
Solution Approach 1:
The patent applies parameter changes by adjusting the fan rotating speed parameter according to the resistance characteristics of different filter assemblies. Instead of using a uniformly high fan speed that causes noise, the system changes the fan speed parameter to match each filter type's resistance, achieving adequate airflow through high resistance filters without excessive noise generation.
Data Source
AI summary
An air supply device and a control method are disclosed. Different types of filter assemblies can be mounted in the air supply device, each filter assembly includes a filter screen, and the types and/or the quantities of the filter screens of filter assemblies are different. The control method includes: receiving an air supply starting instruction, and obtaining the type of a current filter assembly; obtaining a preset rotating speed corresponding to the type of the current filter assembly; and driving a fan of the air supply device to rotate at the preset rotating speed.