Ventilation cabinet

Abstract

The invention provides a ventilation cabinet. The ventilation cabinet can comprise a cabinet body 100 with an opening 101 formed in the front side, and can further comprise an air exhausting port 201, an air supplementing channel 301 and a flow guiding plate 400, wherein the air exhausting port 201 is installed on the side, close to the rear, of the top of the cabinet body 100; the air supplementing channel 301 can comprise an air supplementing port 302; the air supplementing port 302 is installed on the lower edge of the opening 101 of the cabinet body; and the flow guiding plate 400 is erected on the rear side of an inner cavity of the cabinet body 100, and is provided with a plurality of through holes 401. Besides, the side wall of the cabinet body 100 is of a hollow structure, and the air supplementing channel 301 is communicated with an air supplementing inlet 303 and the air supplementing port 302 along the side wall. The ventilation cabinet can eliminate potential safety hazards, harmful gas in the cabinet is prevented from overflowing, and meanwhile the ventilation cabinet further has the beneficial effects of being simple in structure and low in manufacturing cost.

Description

technical field [0001] The invention relates to equipment, in particular to a fume hood. Background technique [0002] Fume hoods (also known as fume hoods or fume hoods) are used to capture, contain, and remove exhaust gases and harmful gases, create a safe working environment, and prevent users from inhaling exhaust gases or harmful gases that endanger life and health. The traditional fume hood is connected to the exhaust fan at the exhaust outlet, or the exhaust outlet is connected to the exhaust duct of the large exhaust fan of the building, and the gas in the working chamber of the fume hood is sucked by the suction of the exhaust fan. Drain away, and introduce ambient air from the front opening of the fume hood, and use a high-power fan to exhaust the air in the working chamber to contain and process harmful substances in the air. Under the design concept of traditional fume hoods, the higher the air volume sent from the front opening, the more effective the fume hood...

AI Technical Summary

Problems solved by technology

[0004] Although the fume hood has a good energy-saving effect, the following defects are also found: when the fume hood is working, the exhaust system performs suction, the gas in the fume hood flows along the hollow arrow shown in the figure, and the supplementary air system passes through the supplementary air port The air supply provides supplementary air; at the same time, the indoor air near the front opening outside the fume hood is sucked into the working chamber through the front opening to become supplementary air

That is to say, the wind sent by the air supply port may overflow from the fume cabinet after being polluted by the gas in the cabinet, and since the wind direction sent is from bottom to top, facing the operator's nose, once this kind of fume cabinet The air curtain is broken, and the air containing pollutants will be directly sent into the respiratory tract of the operator, causing a very serious safety hazard

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