Electric Fan Ceiling Fan Airflow Laboratory

1 Introduction to Testing Equipment

The ceiling fan air volume test device provides stable and reliable environmental conditions, and calculates the air volume, supply cone angle, and energy efficiency value based on this. Use the anemometer method to complete the test of the nominal air volume of the electric fan. During the experiment, the anemometer has an automatic walking mechanism that can automatically operate at the specified point according to national standards. The operator is outside the testing room and will not affect the wind field. The computer automatically collects power, current, and wind speed, calculates average wind speed and air volume, completes data processing, records and saves experimental data, and can automatically generate air volume reports and energy efficiency data and print experimental reports. This air volume testing device is based onGB12021.9-2008Energy Efficiency Limits and Grades for AC FansGB/T 13380-2007第6.7.2Standard terms and requirementsThe laboratory requirements specified inside require construction. Simultaneously meet the requirements of the current version of the above standards and the new version of the standards that are in the revision stage.

II technical specifications

1Equipped with environmental temperature and humidity control device, temperature:20℃±5℃, humidity:40%～80%Therefore, it is recommended to install the test shielding room in a room with central air conditioning or install independent air conditioning, and control the temperature outside the shielding room to be lower than20℃ can ensure that the testing requirements are met. This plan does not include the temperature control part of the experimental environment.

2The system is equipped with a laser beam for direct positioning of the anemometer, ensuring that the axis of the anemometer blades is always parallel to the axis of the electric fan blades. The mounting mechanism of the anemometer should minimize obstruction to the airflow;

5The220V/50Hz/about3kVA.

6Load bearing standard: not exceeding3.5kN/㎡ (already committed)

III Device requirements

1The device complies withIEC60879The standard requirements for air volume testing include reasonable design, high degree of automation, convenient use, durability, load-bearing and anti vibration capabilities;

2Test scope: ceiling fan;

3Test parameters and items: temperature, humidity, atmospheric pressure, wind speed, air volume, input power, energy efficiency value.

4The system adopts computer control and can display the wind speed value of each test point. Generally 3 One measurement point per minute (including positioning and delay) 1 About minutes and testing time 2About minutes), the average wind speed and point air volume of each circle,

It can automatically generate detection results and process curves, and print them out.

5During the experiment, the distance from the fan blade axis should be taken into account40mmMeasure from two points on the left and right, starting at each point80mmThe increment moves along the horizontal line point by point towards both sides until the measured average wind speed drops below9m/minUntil then;

6The fan mounting bracket and anemometer base are equipped with a universal adjustable pan tilt, and the installation height can be easily adjusted within the required range;

7German Detu435-2Type impeller anemometer, impeller diameter100mm; jointly4One;

8The system should be equipped with a multifunctional electricity meter that can measure voltage, current (true RMS), and power500VAVariable frequency (±)1%）Voltage regulating power supply, please refer to the configuration table for specific configuration;

4、 Accuracy description of the tested machine

The accuracy of the instruments used meets the requirementsGB/T13380-2007standard6.1Requirement.

Ø Wind speed sensor: impeller diameter: ≤100mmMeasurement range:0～1200m/min(20m/s)Measurement accuracy: 0.1 m/s±1.5%Measurement value; Wind speed sensitivity: better than0.15m/sHigh quality and well-known brands must be used.

Ø Power meter: voltage, current, power; Accuracy:0.1%Adopting high-quality and well-known brands (voltage)/electric current:DC±(Reading of0.1% +Range of measurement0.2%)，0.5Hz≤f< 45Hz±(Reading of0.1% +Range of measurement0.2%)，45Hz≤f≤66Hz±(Reading of0.1% +Range of measurement0.1%)，66Hz < f≤1kHz±(Reading of0.1% +Range of measurement0.2%)，1kHz < f≤10kHz±{Reading of(0.07×f)%+Range of measurement0.3%}The self heating effect caused by current input:ACIncrease reading accuracy in current0.00015 ×I2%.)

Ø Test power supply: Variable frequency power supply, capacity:500w(Single phase), load stabilization rate:<1%High quality well-known brands are required (load stabilization rate: ±)1%Within, frequency stability: ≤0.01%Waveform distortion: ≤2%）

Ø Temperature and humidity transmitter: Humidity measurement range:0～100%RHMaximum measurement accuracy: ± of the measured value5%Temperature measurement range:-20～80℃； Maximum measurement accuracy: ± of the measured value1.5%It is necessary to use high-quality well-known brands（0-100%RHFull range measurement, accuracy ±2 %RH）

Ø Atmospheric pressure sensor: Range:0～2MPaAccuracy: ≤0.5%F.SResolution: ≤1%F.SWe need to use high-quality well-known brands.

4 Laboratory Structure

（1） Laboratory size

The laboratory provides a stable environment for fan airflow testing. comply withGB/T 13380-2007第6.7.1The requirements for the section, laboratory dimensions and deviations for air volume are as follows:

Long:4500mm

Width:4500mm；

High:3000mm

The above size error range: ±15mm

The experimental screen adopts50mmThe construction of thick polystyrene lightweight insulation board requires the floor to be level, and the sensor positioning mechanism is directly built on the floor. The testing mechanism should be as small as possible to minimize the impact on the wind field. The testing device itself is a separate structure, so the unstable vibration of the tested fan during operation will not affect the wind speed sensor.

（2） Laboratory Structure

The laboratory has doors and windows, and there are lighting fixtures on the top. The lighting system is independently powered and controlled through a power control box, and the testing fan power is supplied separately by a variable frequency power supply.

The air volume chamber and fan testing platform can achieve the following functions:

b.Fan installation platform

can beXYZMove in three directions, parallel to the anemometer, and the position of the fan axis in the center of the two anemometers.

c.test bench

Composition: Ceiling fan lifting mechanism, sliding rail mechanism, and marking instrument

The lifting mechanism facilitates the adjustment of the distance between the anemometer and the measured fan, the adjustment and replacement of the ring size, and the installation and fixation of the fan. Linear guides are used for load-bearing and reducing the shaking of lateral moving mechanisms. The lateral movement mechanism can be used to automatically control the anemometer to move and sample according to standard requirements; The marking instrument is used to locate the position of the tested fan, the height of the anemometer, etc.

Left and right movement distance of anemometer slide:0～2000mm(automatic adjustment).

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