The air volume laboratory is used to measure the flow of air per unit time. It is often used for the capacity of hot air fans, axial flow hemp, ventilation hemp, range hood, blower or ventilation equipment. The calculation unit is cubic meters per second.
Its basic test principle:
Simulate the actual working state of the test product in the test wind tunnel (the pressure at the air outlet of the test product is consistent with the requirements by the auxiliary fan), and then measure the air pressure difference between the two sides of the nozzle in the wind tunnel, and then calculate the current time by the standard formula The corresponding wind speed is finally multiplied by the spray area and the phase head flow coefficient to obtain the air volume. The device adopts the white-motion measurement and control method of the counting machine. It only needs to manually install the product and replace the nozzle. The whole process of testing a sample only takes ten minutes. It can map the corresponding curves of static pressure and air volume, air volume and speed, current, power, efficiency, etc. The test can also be tested in two head states of inhalation and expulsion. It has the characteristics of convenience, speed, stability, and good reproducibility. It has been tested and used in the scientific research and production process of related products.
Overall plan:
This scheme does not include the structural part of the laboratory building, which is built by the user according to the standard requirements.
Laboratory general requirements:
Size: 4500 (width) × 6000) (length) × 2800 (height) mm or more.
Walls: smooth and flat, with no openings that affect airflow (air conditioner openings should not blow directly).
Ground: The ground should be kept flat.
Temperature and humidity: when the air volume is measured, the air temperature of the laboratory is -5°C-20°, and the humidity is 30%-80%RH (can be customized according to user requirements).
Atmospheric pressure: The altitude is not more than 1000 meters, and the ordinary atmospheric environment is less than 1000 meters.
Test system:
Main components: air volume test wind tunnel, auxiliary fan and damper adjustment mechanism, measurement and control electrical cabinet (including variable frequency power supply, electrical parameter measuring instrument, pressure transmitter, tachometer, etc.), brand computer, printer, test product lift table, test product Install flange and test duct.
System function: After the computer prompts the input of test product parameters and test-related data, all automatic measurement and control functions can be realized, including, air volume measurement: voltage, current, power measurement: speed measurement, temperature, humidity and atmospheric pressure measurement, test process prompts, data
According to tables, correlation curves, etc.
Power distribution requirements:
The user must provide an independent power distribution switch, three-phase four-wire plus ground wire power supply: AC 380V, 50Hz maximum capacity: 5KVA.
testing software:
1) Using the WinxP operating system, the password interface and Chinese display;
2) All measured data can be collected, and real-time continuous monitoring can be performed in the form of numbers and tables,
3) When the test is over, the original data can be automatically processed, displayed and printed;
4) Historical data query function. Data can be queried, displayed and printed with parameters such as test date, serial number, model, etc.:
5) The interface and related data can be repaired according to the user's requirements;
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