Floor-standing ventilation cabinet

Landing Draft Fume Hood

Fume hoods are essential safety equipment in laboratories, primarily used for expelling indoor exhaust gases. They are commonly used laboratory equipment in situations where harmful gases need to be vented and for cleaning and waste disposal during experiments.
The primary function of a fume hood: The main function of a fume hood is exhaust, particularly in chemical laboratories where harmful gases, odors, and flammable, explosive, or corrosive substances are produced during experiments. To ensure user safety and prevent the spread of contaminants from experiments, fume hoods are used near the source of pollution. Historically, fume hoods were used sparingly, only in experiments involving harmful and dangerous gases or those that generate large amounts of heat. The fume hood primarily serves as an auxiliary function to the experimental table.
The purpose of using a fume hood is to exhaust harmful gases produced during experiments, thereby protecting the health of the experimenters. This means that the fume hood must have high safety and operability. Consequently, the fume hood should possess the following functions:
Release Function: The equipment should be capable of diluting harmful gases generated inside the fume hood by absorbing external air from the absorption cabinet before discharging them outdoors.
Non-backflow function: The function should ensure that the air flow generated by the exhaust fan in the fume hood does not reverse flow back into the room. To achieve this function, it is preferable to connect a fume hood to an exhaust fan with a single pipe. For those that cannot be connected with a single pipe, they should only be connected in the same room on the same floor. The ventilation fan should be installed as close to the end of the pipe (or at the top of the floor) as possible.
Isolation Function: The fume hood should be equipped with a non-slip glass viewing window in front to separate the inside and outside of the fume hood.
Supplementary Feature: Must have a channel or alternative device for drawing in air from outside the fume hood when releasing harmful gases.
Controlled Wind Speed Function: An intake speed is required to prevent the release of harmful gases.
Thermal and acid-base corrosion resistance: Some fume hoods require the installation of electric furnaces, and some experiments produce a large amount of acidic and alkaline harmful gases with strong corrosive properties. The countertops, lining panels, side panels, and the selected water nozzles, gas nozzles, etc., of the fume hood should all possess corrosion-resistant features.