Industrial fan air volume detection equipment

Industrial fan air volume detection equipmentDesign basis

according to GB/T17713—2011Range hoodHow to translate Appendix to the standardFOdor reduction testverifymethod”The requirements ，

Design research Develop a set of testing equipment to complete this experiment and meet the testing requirements.2、 Composition of experimental apparatus

The device consists of two main parts ： The first part includes: a simulated kitchen laboratory, odor generation system, sampling system

Integrated electrical control system. The second part includes an odor content measurement system and a data processing system. This technical solution is only applicable to thePart of the implementation will be elaborated.

3 3

1. Industrial fan air volume detection equipmenttechnical indicatorsThe size requirements for the experimental room of the simulated kitchen are: lengthX Width x Height:3.5 m×2.5 m×2.5 m ，22 m

2. ± 2 m1 Requirements for airtightness of simulated kitchen laboratory: After measuring the highest odor concentration in the laboratory, 5Odor measured after hours

3Concentration, with a decrease value not greater than%. Power of heater:1702KW/220V10Temperature control accuracy:2±

4Accuracy of ℃ thermocouple: ± ℃．Each drip:300g ±1gRoom temperature distilled water and12g ±0.1g Mixed solution of butanone (analytical grade);Time for each drip:30min

5±15s

The form of the tested machine:

1Outward and Recirculation

4、 Technical solutionSimulated kitchen laboratory (1)Adopting an assembled and well sealed warehouse plate structure, the material is double-sided color steel, and the plate thickness is 75mm At the same time, internal additionspread

PPPlate sealing welding.Internal dimensions: LengthX Width x Height:3.5 m×2.5 m

×

2.5 m(Control cabinets, samplers, gas chromatography analysis workbenches, and observation channels need to be reserved outside the laboratory.)(2)There are two doors to the laboratory:，One is the gate for personnel to enter and exit,Door opening size:1800mm ×800mmOne is the small air intake door (ventilation window), with a door opening size of:700mm

×350mm (3) Install an observation window on one wall of the laboratory, using5mm The glass; (4)3A fan should be placed in the center of the laboratory to assist in the uniform diffusion of odors, with a flow rate of250m/h3±

50m4/()Place a diffuser screen next to the ventilation window in the laboratory, size:1000mm

2×

700mm Odor generation system (1)The drip funnel should be in place 315 30min Complete the agreement internally mLDropping of liquid. The capacity of the liquid storage container is 500mL .(2)Realize automatic dripping，Utilize the on-off function of relays

， Enable people to control the start and end of droplets outside the laboratory. (3)

3The evaporating dish should be able to quickly evaporate the dripping liquid. Using electric heating furnace, power

2KW Electrical control system

(1) Provide working power to the tested range hood. 170(2)10Provide working power to the electric heating furnace and automatically control its working temperature within± Within the temperature range of ℃. Using one piece PID The temperature control meter and solid-state relay are used for adjustment, and the temperature sensing element is

K Type thermocouple.

4(3)

Through the control of relays, automatic dripping can be achieved without personnel entering the room. Sampling system

(1) Install a sampling bracket in the laboratory, set up four sampling points on it, collect them, seal them and lead them out of the room.(2)Outside the laboratory, there is oneTaiwanThe sampler extracts the collected gas sample ，

5Then it is directly sent to the gas chromatography analyzer 50Conduct testing and analysis. 5Before testing the cyclic range hood, a brand new filter must be installed ℃ Shi Placed in a ℃ oven

616h Ensure dryness.Evaporative solvent12g ± 0.1gThe measurement of butanone (analytical grade) is carried out using an electronic balance, with a maximum range of 320g ，readability