Construction points of laboratory ventilation system

release time：

2022-05-23 11:07

Main points of ventilation pipe design:

◇ It is a better way to connect a fume hood and a fan with a single pipe.

◇ If it cannot be connected by a single pipe, only those in the same room on the same floor can be connected in parallel.

◇ The ventilator should be installed as far as possible at the end of the duct (on the roof, etc.).

◇ The shorter the pipe length, the better.

◇ The more the fume hood is connected to a ventilator, the better. The exhaust channel should be as vertical as possible, and the higher the channel, the better.

◇ If you need to change the wind speed of the air duct, you should configure the corresponding frequency conversion adjustment system.

◇ The end of the exhaust channel should avoid the air supply port of the supplementary air duct as much as possible to prevent the harmful gas discharged from being sent to the fume hood through the exhaust duct.

How to choose a fume hood

The fume hood is not a separate device, and changes in the external environment will affect the performance of the fume hood. At the same time, the fume hood and its control system will also affect his surroundings. When you choose a fume hood:

First of all: factors of the whole system must be considered, such as: laboratory space, building ventilation control system, arrangement of exhaust pipes and placement of fume hoods, etc. Dalian Ruixin's R&D personnel and system engineers are willing to share Together you provide a safe and comfortable overall design and planning for your laboratory.

Second: You need to determine which type of fume hood you need. When choosing, you can usually measure according to the following factors:

1. Upper cabinet part:

There are three styles: standard, low table, floor-standing

Whether the surface wind speed of the fume hood meets the safe wind speed requirements stipulated by international standards: 0.5m/s (international standards stipulate: only the surface wind speed reaches 0.5 m/s to effectively capture the harmful gases in the cabinet)

Whether the opening height of the fume hood meets your requirements for the operating space

Ventilation control system: constant air volume, variable air volume or adaptive control system

Lining board material: anti-Bett board, epoxy resin board.

Whether the raw material of the adjusting door is made of safety glass, and whether its design conforms to human mechanics, so that the operator can pull it freely

2. Countertop part: Whether the countertop adopts a safe dish-shaped design, which is convenient for users to clean the countertop and prevent the leakage of toxic liquids

Whether the material of the countertop meets the needs of your experiment and resists the corresponding extra corrosion and high temperature

Whether the cup trough and sink are installed, and whether the installation position is reasonable.

Is the design of the air outlet reasonable?

3. Low cabinet part:

Whether the material is sturdy and durable, whether it is a fireproof material, and whether it can resist the erosion of the acid-base environment in the laboratory

Whether the power supply is reasonable and safe

Whether it is easy to maintain water, electricity and gas systems

Whether the base cabinet needs an air extraction design so that you can place volatile medicines

After you have basically selected the model, style and size of the fume hood, you can determine what you need according to the following conditions

4. Auxiliary accessories:

Water source: distilled water, pure water or reverse osmosis water, etc.

Gas source: nitrogen, oxygen or air, etc.

The choice of electrical system should be considered: model, voltage, explosion-proof, durability, etc.

For the sake of beauty, is it necessary to seal the board?

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