Multiple - Nozzle Air Flow Test Equipment Standard Range Hood /
Ventilator Air Duct For Household
● Overview:
This device is applied to testing the air flow performance of range
hood and ventilator for
household and similar purposes, and is in accordance with testing
requirements of GB/T 1236
Industrial Fans-Performance Testing Using Standardized Airways, and
requirements of ISO
5801, JIS B8330, JIS C9603 and other standards.
● Test principle:
Based on the Bernoulli's principle of Fluid Mechanics, use the
pressure difference before and
after flowing through the nozzle to calculate the air velocity and
then the air flow can be acquired
through multiplying the air velocity by the cross-sectional area of
nozzle. During the test, use
auxiliary fan and regulating damper to change air flow and then
measure static pressure under
different air flow values. Finally, air performance curve of range
hood or fan can be acquired
through computer data processing.
● Performance and features
① This device adopts multiple-nozzle air chamber type structure. As
it can select corresponding
nozzles according to the tested flow, so this device has wide flow
measurement range.
② It can be used for exhaust and gas absorption test.
③ Equipped with auxiliary fan, it can measure full range
performance curve when airflow is zero
and static pressure is zero.
④ Equipped with imported high accuracy pressure sensor, the testing
result is accurate and
reliable.
⑤ Automatic test, calculation and data output can be achieved
through computer and peripheral
equipment and the testing result can be displayed in graphics and
printed. With human-machine
interaction, it is simple in operation, and high in accuracy and
takes less time and energy.
⑥ Testing items: Automatic or manual P-Q features (relation between
flow and static), Q-W
features (relation between flow and power), Q-η feature (relation
between flow and efficiency) and
current and power of tested object by synchronous test.
⑦ This device applies to performance test of ventilator,
air-conditioner fan, cooling fan, range
hood and others.
● Technical parameters
① Air flow measurement range 0.1-50m3/min;
② Static pressure measurement range 0-1500Pa
③ Measurement error of air flow ±1%(under the maximum air flow of
each nozzle).
