Airflow measurement device

Airflow measurement test device Range hood air performance test device:

Airflow measurement deviceAccording to the standard:

IEC61591-2005 Household range hood Performance testing methods, GB/T14806-2003 AC converters and their speed controllers for household and similar purposes.

GB/T 1236-2000 "Performance testing of standardized ducts for industrial ventilation fans" (using nozzle measurement part)

The requirements of Appendix A clause in the draft standard GB/T17713-2011 "Range hood" for comments.

Testing principle of air volume measurement test device:

Airflow measurement deviceIt is a wind volume testing system developed and manufactured according to IEC standards and 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), and then measure the pressure difference on both sides of the nozzle in the wind tunnel,

Then calculate the corresponding wind speed using the standard formula, and finally multiply it by the nozzle area and relevant flow coefficient to obtain the air volume.

Applicable products:

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

Overall plan:

This plan does not include the laboratory building structure, which will be constructed by the user according to the standards;

1. General requirements for the laboratory

The air performance test device for range hood adopts orifice plate measurement method to complete the tests of nominal air volume, nominal pressure and efficiency of range hood. During the experiment, manually replace the orifice plate,

The computer automatically collects pressure values, temperature values, and power values, completes data processing, and prints out the test report.

Size: 4500 (width) x 6000 (length) x 2800 (height) mm or more.

Wall: Smooth and flat, without any openings that affect airflow (air conditioning openings should not be blown directly).

Ground: The ground should be kept flat.

2. Testing system

1) Main components:

Wind tunnel for air volume testing, auxiliary fan and damper adjustment mechanism, measurement and control electrical cabinet (including variable frequency power supply, electrical parameter measuring instrument, pressure transmitter, tachometer, etc.), branded computer

Printer, sample lifting platform, sample installation flange, and testing air duct.

2) System functions:

After being prompted by the computer to input the parameters of the test sample and relevant test data, all automatic measurement and control functions can be achieved, including air volume measurement; Voltage, current, and power measurement; Speed measurement

Temperature, humidity, and atmospheric pressure measurement, testing process prompts, data tables, relevant curves, etc.

3) Distribution requirements:

The user must provide an independent distribution switch, three-phase four wire plus ground wire power supply: AC 380V, 50Hz, maximum capacity: 5KVA

3. Wind volume measurement test device testing software
1）. Using WinXP operating system, with a window interface and Chinese display.
2）. All measured data can be collected and continuously monitored in real-time in the form of numbers and tables.
3）. After the test is completed, the raw data can be automatically analyzed and processed, and the test data can be displayed and printed.
4）. Historical data query function. Data can be queried, displayed, and printed using parameters such as test date, number, and model.
5）. According to user requirements, interface and related data can be patched.

Technical specifications for air volume measurement test device:

1. Laboratory power supply: AC 220V/AC 380V 50HZ; capacity: 5KVA

2. Laboratory environment: 20 ℃± 5 ℃ Humidity: 30% -80% Atmospheric pressure: Normal

3. Measurement air volume range: 0.06m3-25m3)/min

0.2m3—50m3）／min

4. Static differential pressure: 0-1250Pa ± 0.1% Pa

5. Electrical parameters: The measurement accuracy of voltage, current, and power is level 0.5, with digital display instruments

Range: Voltage AC 0-300V

6. Speed: Digital display 0-19999 revolutions per minute ± 5RPM

7. Air temperature: 0-100 ℃± 0.5 ℃

8. Air humidity: (20-98)% R · H ± 4%

9. Variable frequency stabilized power supply: Input voltage: AC 220V 50HZ, output voltage: AC 0-110V-220V -300V continuously adjustable, ≤ 1%

10. Operating condition testing, automatic adjustable (replacing the original 18) throttle orifice plate tested and

Calculation project:

1）. Static pressure measured inside the pressure reducing cylinder: Ps6 (Pa)
2）. Input power: P (W)
3）. Airflow under experimental conditions: Qv (m3/s)
4）. Total pressure under test conditions: Pfb (Pa)
5）. Total pressure of air standard state: Pfbn (Pa)
6）. Static pressure under experimental conditions: Ps2n (pa)
7）. Total pressure efficiency under experimental conditions: η (%)

11. The measurement results that can be automatically calculated by the computer after the test is completed:
1）. Maximum static pressure (static pressure value at zero airflow):Ps2n (max) Pa
2）. Maximum airflow (airflow value at zero static pressure): Qv (max) m3/min
3）. Static pressure at specified air volume (7m3/min): Ps2ns Pa
4）. Main motor input power at specified air volume (7m3/min): P W
5）. Total pressure efficiency at specified air volume (7m3/min): η%

12. 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.

Range hood air volume chamber, range hood air volume chamber, ventilation fan air volume chamber, air volume measuring device

Airflow measurement deviceTechnical Specifications:

1. Laboratory power supply: AC 220V/AC 380V 50HZ; capacity: 5KVA

2. Laboratory environment: 20 ℃± 5 ℃ Humidity: 30% -80% Atmospheric pressure: Normal

3. Measurement range of air volume: F401-025: (0.06m3-25m3)/min

F401-050：（0.2m3—50m3）／min

4. Static differential pressure: 0-1250Pa ± 0.1% Pa

5. Electrical parameters: The measurement accuracy of voltage, current, and power is level 0.5, with digital display instruments

Range: Voltage AC 0-300V

6. Speed: Digital display 0-19999 revolutions per minute ± 5RPM

7. Air temperature: 0-100 ℃± 0.5 ℃

8. Air humidity: (20-98)% R · H ± 4%

9. Variable frequency stabilized power supply: Input voltage: AC 220V 50HZ, output voltage: AC 0-110V-220V -300V continuously adjustable, ≤ 1%

10. Operating condition testing, automatic adjustable (replacing the original 18) throttle orifice plate tested and