Air Filter Mesh Blockage Detection Using Motor Parameter Monitoring
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Solution Overview
Problem
Existing air conditioning systems require additional hardware and complex wiring to monitor air volume, leading to increased production costs and reduced ventilation efficiency due to the large size of DC motors and motor controllers.
Innovation Solution
A device with a blower motor that acts as a unit for detecting air volume, equipped with a microprocessor, inverter circuit, and motor operation parameter detecting circuit, which determines air filter mesh blockage without additional hardware, featuring a compact structure and low production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an anemometer or air volume meter is installed to monitor air volume, then air volume monitoring is achieved, but additional hardware and complex wiring are required which increases production cost
Solution Approach 1:
The motor controller is designed to perform multiple functions: it controls the blower motor operation and simultaneously monitors air volume by detecting motor operating parameters (current, voltage, speed). This eliminates the need for separate air volume measurement devices and reduces overall system complexity while maintaining monitoring capability.
Solution Approach 2:
The system uses its own existing components (motor controller and motor operation parameter detection circuits) to perform air volume monitoring. The motor controller self-monitors the motor's operating parameters and calculates air volume from these parameters, eliminating the need for external monitoring hardware.
2Measurement precision
If a DC motor with motor controller is installed in the air duct to monitor air volume, then air volume monitoring is achieved, but the large size occupies relatively large space of the air duct and reduces ventilation efficiency
Solution Approach 1:
The blower motor and its controller serve dual purposes: they perform the primary function of moving air for ventilation while simultaneously monitoring air volume through parameter detection. This eliminates the need for separate monitoring devices that would occupy additional space and potentially impede airflow.
Solution Approach 2:
The motor controller is designed to perform multiple functions: it controls the blower motor operation and simultaneously monitors air volume by detecting motor operating parameters (current, voltage, speed). This eliminates the need for separate air volume measurement devices and reduces overall system complexity while maintaining monitoring capability.
3Measurement precision
If a DC motor with motor controller is installed in the air duct to monitor air volume, then air volume monitoring is achieved, but the large size makes installation difficult and the motor controller has high cost
Solution Approach 1:
The blower motor and its controller serve dual purposes: they perform the primary function of moving air for ventilation while simultaneously monitoring air volume through parameter detection. This eliminates the need for separate monitoring devices that would occupy additional space and potentially impede airflow.
Solution Approach 2:
The motor controller is designed to perform multiple functions: it controls the blower motor operation and simultaneously monitors air volume by detecting motor operating parameters (current, voltage, speed). This eliminates the need for separate air volume measurement devices and reduces overall system complexity while maintaining monitoring capability.
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 solution allows for efficient air volume detection and obstruction alerts without additional hardware, reducing production costs and maintaining ventilation efficiency by utilizing the blower motor as a unit for air volume detection.
Implementation Method 1
The permanent magnetic rotor assembly and the stator assembly form magnetic coupling
Data Source
AI summary
A device for detecting blockage of an air filter mesh, including: an air inlet, an air outlet, an air duct, a fan or a wind wheel, a blower motor, an air filter mesh, and a controller. The controller includes a main control board including: a microprocessor, an inverter circuit, and a motor operation parameter detecting circuit. The air filter mesh is disposed in the air duct. The motor operation parameter detecting circuit inputs a real time operation parameter into the microprocessor, and the output terminal of the microprocessor controls the inverter circuit. A function module of the microprocessor calculates a detected air volume according to the real time operation parameter. When the detected air volume is smaller than a preset air volume, the microprocessor determines that the air filter mesh is obstructed and outputs a signal to an alarm circuit to trigger an alarm.