Method for automatically testing airflow characteristics of fan

The invention provides an automatic test method for fan airflow characteristics, and the method comprises the steps: S1, obtaining a preset working condition point and corresponding nozzle switch state information after a tested fan is started; s2, according to the nozzle opening and closing state information, the nozzle opening and closing state of the multi-nozzle air chamber wind tunnel is controlled; s3, controlling the output percentage of the induced draft fan according to the air volume value or zero static pressure of the working condition point, so as to enable the running state of the tested fan to be stable; and S4, when the operation state of the tested fan is determined to be stable, controlling the data collector and the pressure instrument to collect data of airflow characteristics, and calculating actual air volume and standard air volume according to the collected data. According to the automatic testing method for the airflow characteristics of the fan, the full-automatic testing function of