Comprehensive fume hood for laboratory

Abstract

The invention discloses a comprehensive fume hood for laboratories, which comprises an upper cabinet and a lower cabinet. The top of the upper cabinet is provided with an exhaust hood communicating with the inner cavity of the upper cabinet. The upper cabinet The bottom surface of the upper cabinet is a workbench, and the upper cabinet includes four main frame columns fixed on the four corners of the workbench, the left light-transmitting glass plate, the right light-transmitting glass plate, and the rear light-transmitting glass plate fixed on the main frame columns. The glass plate and the front transparent glass plate, the lower cabinet includes a negative pressure cabinet for storing the negative pressure machine, and the workbench is provided with an inner end connected to the negative pressure machine in the negative pressure cabinet. Negative pressure suction tube at the crimping tube; the invention has the advantages of reasonable structural design, good overall visual light transmission, and convenient operation and placement of experimental instruments.

Description

technical field [0001] The present invention relates to a laboratory comprehensive fume hood. Background technique [0002] Fume hoods are an integral part of laboratory ventilation design. The most important function of the fume hood is the exhaust function. In the chemical laboratory, various harmful gases, odors, moisture and flammable, explosive and corrosive substances are generated during the experimental operation. In order to protect the safety of users , to prevent the contaminants in the experiment from spreading to the laboratory, and use a fume hood near the pollution source. [0003] However, in the prior art, for example, Chinese Patent Publication No. CN 203343152 U discloses a laboratory fume hood, and its structure includes a cabinet body, the cabinet body includes an upper layer and a lower layer, and the upper layer is a workbench, and the The top is equipped with an air outlet and a condensate collection tank, the front of the workbench is provided with...

AI Technical Summary

Problems solved by technology

[0005] (1) Only the front of the workbench is equipped with a window explosion-proof glass door. Therefore, the overall view of the fume hood is still opaque, and the space of the laboratory is often relatively limited. If multiple opaque fume hoods are arranged side by side, it will make the whole laboratory Poor lighting

[0006] (2) The setting of the workbench is unreasonable, and there is a lack of fixing devices for the color comparison cards. During the experiment, the students will randomly paste the color comparison cards, resulting in poor aesthetics of the laboratory site, and the loss of the color comparison cards often occurs , inconvenient to use;

[0007] (3) Small objects such as medicine spoons, droppers, glass rods, tweezers, thermometers, and test tube holders are often stuffed directly into the cabinet of the fume hood. During the process, these small objects are randomly placed on the test bench, which affects the cleanliness of the test bench, and small objects are easy to be touched by mistake and fall to the ground

[0008] (4) Glass instruments (such as beakers, alcohol lamps, measuring cylinders, burettes, pipettes, etc.) are mixed with each other in the cabinet of the fume hood, which may easily cause the glass instruments to be fragile and difficult to access

[0009] (5) Negative pressure machines are needed in chemical experiments (such as suction filtration). Students need to carry the negative pressure machine to the workbench of the fume hood for experiments during the experiment, which is inconvenient to use

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