Aerodynamic performance and ventilation fan air volume test device

Applicable range hood(Range hood with internal blowerBCirculating air range hood with internal blowerCRange hood with external blower for indoor useDRange hood with external blower)Measurement of air volume and aerodynamic performance. The maximum wind capacity that can be achieved is26m³/minThe maximum wind pressure is900PaThe range hood and ventilation fan. Measurable air flow and pressure of the tested instrument(static pressure difference)Waiting for performance indicators, as well as selecting the testing environment temperature and pressure.

1System Overview

This testing system utilizes an intelligent industrial control integrated system for control, with a large-sized computer for display and operation. It automatically measures, records, and prints test reports, and can analyze test results and data to meet the needs of product development and production.

This testing system can measure the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. According to the appendixAThe test shall be conducted using the method of testing, and the instrument shall be operated at the highest speed gear under rated voltage and rated frequency, and its indicated value shall comply with the table1regulations:

table1 Air performance limit values

II Testing principle and layout

This scheme adopts a blowing test mode, which automatically opens the nozzle combination according to the set air volume, and controls the air volume by infinitely adjusting the frequency of the auxiliary fan through a frequency converter; The middle of the wind chamber is composed of a uniform flow orifice plate, a nozzle, a starting actuator, and a nozzle plate; The size of the wind chamber interface is600mm×600mmThis system automatically calculates the fan airflow by measuring the pressure difference before and after the nozzle. When this equipment is running, the performance test device for the fresh air fan is turned on. The air volume of the auxiliary fan is controlled by controlling the opening and closing combination of the air chamber nozzle and the current frequency of the variable frequency device. The static pressure at the corresponding air volume is measured by a high-precision micro pressure gauge to obtain the corresponding data of the air volume and air pressure of the tested fan, and the air volume and air pressure curves are plotted.

3、 Measure the range of air volume

（0.06—25 Cubic meters per minute, （3.6-1500cube/Hour)

quiet poor Pressure: 0—1500 Pa≤±1%Or ±1.5PaThe measured pressure is less than100PaWhen the basic error is less than ±0.4Pa）；

Electrical parameters: The measurement accuracy of voltage, current, and power is 0.2 Grade, digital display instrument

Range: VoltageAC 0-300V

electric current:AC 0--10A

Power: 0—1000W

Speed: 0-5000turn/divide ±5RPMDigital Display

Air temperature:0—50℃ ±0.5℃

Equipment size approximately:3200*800*1450mmLength, width, and height (for reference only)