Column fan air performance testing machine

This test method adopts the multi nozzle air flow testing method specified in GB/T1236-2017.

According to the standard:

IEC61591-2005Household range hood.Performance testing methodsGB/T14806-2003Household and similar use AC converters and their speed controllers.

GB/T 1236-20017Industrial ventilation fan Performance testing using standardized air ducts "(using nozzle measurement section)

GB/T17713—200XRange hood standard(draft for soliciting comments)AppendixARequirements of the terms.

Testing principle:

The air volume measurement test device is based onIECA standard air volume testing system developed and manufactured using advanced Japanese technology.

The basic testing principle is to simulate the actual working state of the test sample in the testing wind tunnel (using an auxiliary fan to make the outlet pressure of the test sample consistent with the requirements), then measure the pressure difference on both sides of the nozzle in the wind tunnel, calculate the corresponding wind speed using a standard formula, and finally multiply it by the nozzle area and relevant flow coefficient to obtain the air volume.

The device adopts a computer automatic measurement and control method, which only requires manual installation of the test sample and replacement of the nozzle. The entire process of testing one test sample only takes ten minutes. It can measure the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. The test sample can also be tested in both inhalation and excretion states. It has the characteristics of convenience, speed, stability, reliability, and good reproducibility. Satisfy the testing and use of related products in scientific research and production processes.

Applicable products:

Cooling fan, axial fan, ventilation fan, range hood, etc.

The air performance of column fans shall be evaluated according to this appendix. Due to the fact that the pressure of column fans is usually less than 1000Pa, the reference Mach number does not exceed

0.15, the influence of air compressibility and humidity on experimental results can be ignored. If measured in a section of pipe with an air velocity less than 25m/s

When measuring, the temperature is assumed to be equal to the stagnation and static temperatures.

The pressure of the column fan and the input electrical power should be converted to the values of the reference air density (px=1.2kg/m *).

The air performance test device for column fans is shown in Figure C.3.

For the technical requirements and detailed rules for the design, manufacturing, and use of experimental devices that are not specified in this appendix, reference can be made to GB/T1236

2017.

During the experiment, the inlet and outlet of the column fan should be in a free space or connected to the testing device, and at rated voltage Rated frequency and

Running at the highest speed gear.

The column fan should be operated on the test device until the speed stabilizes (for more than 1 hour) before measuring the reading.