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Method for measuring airflow of fan motor

A technology of motor measurement and air volume, which is applied in the direction of measuring flow/mass flow, measuring device, liquid/fluid solid measurement, etc. It can solve the problems of increased cost, troublesome installation and wiring, etc., and achieves easy installation, simple scheme and high feasibility. Effect

Active Publication Date: 2014-12-03
ZHONGSHAN BROAD OCEAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing solutions: Some install an air pressure gauge in the air outlet or air duct to judge the air volume, and some install an air volume meter to measure the air volume, but this requires additional hardware, troublesome installation and wiring, and additional cost

Method used

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  • Method for measuring airflow of fan motor
  • Method for measuring airflow of fan motor
  • Method for measuring airflow of fan motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] First introduce the circuit structure of the blower motor that the present invention adopts and the measurement control principle of air volume below:

[0043] The present invention is as figure 1 As shown, in a typical air-conditioning ventilation duct (referred to as the air duct), a blower system (such as a gas furnace or an air handler) is installed. When the motor starts, it starts to blow air. Since the number of air outlets and air inlets is related to the number of rooms, there is no uniform standard for the design of the pipeline, and the air filter may also have different pressure drops. As a result, the air blowing system equipped with the traditional single-phase AC motor --- PSC motor is in different pipes, and the actual air volume will be different. The fan motor used in the invention is a BLDC motor or an ECM motor.

[0044] Such as figure 2 As shown, 1) The control of the product is an air conditioning system controller, the air conditioning system ...

Embodiment 2

[0096] A method for measuring air volume by a fan motor, characterized in that it comprises the following steps:

[0097] A) Establish M air volume points CFM in the microprocessor of the motor controller i Corresponding M constant air volume control functions Q i =F(n), where Q is the DC bus current parameter, n is the speed of the motor; i is an integer, starting from 1 to M;

[0098] B) Start the motor, after entering the steady state, detect the real-time speed n0 and parameter Q0 of the motor, and substitute the parameter Q0 into the above-mentioned several air volume points CFM i Corresponding several constant air volume control functions Q i =F(n) to get several rotational speeds n i , compare the real-time speed n0 with several air volume points CFM i Corresponding to several speeds n i , to determine the real-time detected air volume CFM0 at the two air volume points CFM i and CFM i-1 between;

[0099] C) Using the two determined air volume points CFM i and C...

Embodiment 3

[0104] A method for measuring air volume by a fan motor, characterized in that it comprises the following steps:

[0105] A) Establish M air volume points CFM in the microprocessor of the motor controller i Corresponding M constant air volume control functions Q i =F(n), where Q is the output torque of the motor, n is the speed of the motor; i is an integer, starting from 1 to M;

[0106] B) Start the motor, after entering the steady state, detect the real-time speed n0 and parameter Q0 of the motor, and substitute the parameter Q0 into the above-mentioned several air volume points CFM i Corresponding several constant air volume control functions Q i =F(n) to get several rotational speeds n i , compare the real-time speed n0 with several air volume points CFM i Corresponding to several speeds n i , to determine the real-time detected air volume CFM0 at the two air volume points CFM i and CFM i-1 between;

[0107] C) Using the two determined air volume points CFM i and...

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Abstract

The invention discloses a method for measuring airflow of a fan motor. The method is characterized by comprising steps as follows: A), M constant airflow control functions Qi=F(n) corresponding to M airflow points CFMi are established in a microprocessor of a motor controller, wherein Q can be input power, direct current bus current or torque, and n is the rotating speed of the motor; B), the motor is started, the real-time rotating speed n0 and the parameter Q0 of the motor are detected after the motor is in a stable state, the Q0 is put into a plurality of constant airflow control functions Qi=F(n) corresponding to a plurality of airflow points CFMi, a plurality of rotating speeds ni are obtained, the real-time rotating speed n0 and a plurality of corresponding rotating speeds ni are compared, and the real-time detection airflow CFM0 is ensured to be located between CFMi and CFM(i-1); and C), the real-time detection CFM0 is calculated with an interpolation method. According to the method, blocking of an air filter net can be accurately judged, a signal can be output for giving an alarm, the mathematic model is simple, the control is reliable, and the accuracy is high.

Description

technical field [0001] The invention relates to a method for measuring air volume by a fan motor. Background technique [0002] In recent years, with the increasingly fierce competition in the field of electrical appliances, the technical requirements for products have been continuously improved, such as energy saving and environmental protection, high controllability, intelligent controllability, short development cycle, and low noise. As the core component—the motor, it will undoubtedly become the key component to solve the above technical problems. The motors in traditional household air conditioners generally use single-phase AC motors PSC, single-phase AC motors, low efficiency, relatively energy consumption, large noise, and controllable Sexual intelligence is low. With the development of motor technology, DC motors are gradually replacing AC motors. DC motors have motor controllers, which use motor controllers to achieve the purpose of electronic commutation of curre...

Claims

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Application Information

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IPC IPC(8): G01F1/00
Inventor 王继忠周一桥张政赵勇张先胜孙海荣
Owner ZHONGSHAN BROAD OCEAN
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