Method for controlling air volume output

Abstract

A method for controlling air volume including: 1) establishing a functional relation formula for air volume in a microprocessor control unit of a motor controller; 2) inputting a target air volume into the microprocessor control unit of the motor controller; 3) starting a motor by the motor controller under a torque to enable the motor to fall on a steady state; 4) recording the rotational speed in the steady state, and calculating an air volume in the steady state; 5) comparing the target air volume with the calculated air volume; 6) re-recording a steady rotational speed after the motor falls on a new steady state under an increased or reduced torque, and recalculating the air volume in the new steady state; and 7) repeating steps 5) and 6) to adjust the torque until the calculated air volume is equal or equivalent to the target air volume.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Pursuant to 35 U.S.C. §119 and the Paris Convention Treaty, this application claims the benefit of Chinese Patent Application No. 201210127123.2 filed Apr. 26, 2012, the contents of which, including any intervening amendments thereto, are incorporated herein by reference. Inquiries from the public to applicants or assignees concerning this document or the related applications should be directed to: Matthias Scholl P. C., Attn.: Dr. Matthias Scholl Esq., 14781 Memorial Drive, Suite 1319, Houston, Tex. 77079.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a method for controlling air volume provided by a motor and by an air-conditioning fan system.[0004]2. Description of the Related Art[0005]In an indoor ventilation duct of a household air-conditioner, static pressure often changes because of dust deposition in a duct or blockage of a filter. The static pressure is often higher than the standard stat...

AI Technical Summary

Benefits of technology

The invention provides a method for controlling the air volume provided by a motor with high efficiency, speed, and control accuracy. The method adapts to a wide range of static pressure and uses a simple and convenient mathematical model for air volume calculation. It is easy to implement and has a good application prospect. The method can be practiced at a wide range of static pressure, simplifying the structure of the product and reducing the cost.

Problems solved by technology

In an indoor ventilation duct of a household air-conditioner, static pressure often changes because of dust deposition in a duct or blockage of a filter.

To realize the constant air volume control, an air volume meter is installed, which, however, increases the cost and the potential risk due to failure of the air volume meter.

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