Range hood air performance test room DMS

The range hood air performance testing laboratory is a wind volume testing system developed and manufactured based on IEC standards and advanced Japanese technology.

One Basic testing principles

Simulate the actual working state of the test specimen in the testing wind tunnel (using an auxiliary fan to make the outlet pressure of the test specimen consistent with the requirements), then measure the air pressure difference on both sides of the nozzle in the wind tunnel, and calculate the corresponding wind speed using a standard formula. Multiply * 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. The range hood air performance testing laboratory 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.
1. Product Name: Range Hood Air Performance Test Laboratory
2. Model and specification: DMS
3. Standard basis: GB/T14806, IEC61591, and related product standards.
4. Applicable products: cooling fans, axial fans, ventilation fans, range hoods, etc.

II Overall Plan
The air performance test room plan for range hoods does not include the building structure of the test room, which will be constructed by the user according to standard requirements.
1. General requirements for the laboratory
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.
Temperature and humidity: When measuring air volume, the air temperature in the laboratory is 20 ℃± 5 ℃ and the humidity is 30% -80% (the user should bring their own air conditioner or dehumidifier).
Atmospheric pressure: an ordinary atmospheric environment with an altitude not exceeding 1000 meters.
2. Testing system
Main components: air volume testing 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.), branded computer, printer, test sample lifting platform, test sample installation flange and test air duct.
System function: After being prompted by the computer to input sample parameters and test related 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: Users must provide independent distribution switches, three-phase four wire and grounded power supply: AC 380V, 50Hz * large capacity: 5KVA

III Main technical parameters and indicators of range hood air performance testing laboratory
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
Current AC 0--**
Power range 0-1000W
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%
Output frequency: 50HZ or 60HZ
Output power: 0-1000W
10. Operating condition testing, automatically adjustable (replacing the original 18) throttle orifice plates for testing and calculating items.
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）.*High static pressure (static pressure value at zero airflow): Ps2n (max) Pa
2）. *High air volume (air volume 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.

4 test software
1. Adopting the WinXP operating system, with a window interface and Chinese display.
2. All measured data can be collected and presented in real-time in the form of numbers and tables
Continuous monitoring.
3. After the test is completed, the original data can be automatically analyzed, processed, displayed, and printed
Test data
4. Historical data query function. It can be tested based on parameters such as test date, number, and model
Query, display, and print data.
5. Interface and related data can be patched according to user requirements.