Desktop Exhaust Fume Hood

Desktop Exhaust Fume Hood

Fume hoods are essential safety equipment in laboratories, primarily used for expelling indoor waste gases. They are commonly used laboratory equipment designed for expelling harmful gases within the lab and for cleaning and draining during experiments.
The primary function of a fume hood: The main function of a fume hood is exhaust, especially 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 into the lab, 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 generating large amounts of heat. The fume hood primarily serves as an auxiliary function to the lab table.
The purpose of using a fume hood is to exhaust harmful gases produced during experiments, to protect the health of the personnel involved. This means that the fume hood must have high safety and operability, which requires it to possess the following functions:
Release Function: The system should be equipped with an institution to dilute harmful gases generated inside the fume hood by absorbing external air from outside the cabinet, and then discharge them outdoors.
Non-backflow function: The function should ensure that the air flow generated by the exhaust fan within the fume hood does not reverse and flow back into the room. To achieve this function, it is preferable to connect one fume hood to one exhaust fan using a single pipeline. If a single pipeline connection is not possible, the setup should only be used for connecting fume hoods within the same floor and room. The ventilation fan should be installed as close to the end of the pipeline (or at the top of the floor) as possible.
Isolation Feature: A non-sliding glass viewport should be installed in front of the fume hood to separate the interior and exterior of the hood.
Supplementary Feature: Should have a channel or alternative device to draw in air from outside the fume hood when expelling harmful gases.
Airflow control function: An intake speed is required to prevent harmful gases from escaping.
Heat 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 have corrosion-resistant properties.