Ventilation cabinet

Abstract

The invention discloses a ventilation cabinet. The ventilation cabinet comprises a cabinet body and a ventilation pipe, wherein the cabinet body is provided with an operation cavity; the ventilation pipe is arranged in the operation cavity and comprises an air inlet section, a flow guide section and an air outlet section; the bottom surface of the air inlet section is tightly attached to the innerbottom surface of the operation cavity; the rear side surface of the flow guide section is tightly attached to the inner side wall of the rear end of the operation cavity; the upper end surface of the air outlet section is tightly attached to the inner side wall of the upper end of the operation cavity; the left side and the right side of the ventilation pipe are tightly attached to the left inner side wall and the right inner side wall of the operation cavity; an air inlet of the air inlet section faces forwards; and an air outlet of the air outlet section faces upwards. According to the ventilation cabinet, the ventilation pipe is arranged in the ventilation cabinet, so that dust enters from a single inlet, and dust flying in the experiment process is prevented; meanwhile, the side surface of the ventilation pipe is tightly attached to the inner side wall of the operation cavity so as to reserve more operation space, the air inlet faces forwards, so that the shortest stroke of the dust entering the ventilation pipe can be guaranteed, and the dust removal efficiency is improved; and the bottom surface of the air inlet section is tightly attached to the bottom surface of the operation cavity so that the dust can enter from the bottom surface of the operation cavity, and the dust is prevented from flying high.

Description

technical field [0001] The invention relates to the technical field of experimental equipment, in particular to a fume hood. Background technique [0002] When conducting experiments in the laboratory, harmful gases are often generated during the experiment. In order to prevent the harmful gases from harming the human body, it is necessary to discharge the harmful gases. The laboratory often uses a fume hood to discharge the harmful gases generated during the experiment. [0003] In the past, the fume hood sucked and discharged the harmful gas through the deflector installed inside the cabinet and the negative pressure fan installed on the top of the cabinet. There is a gap between the two deflectors, and the gap forms an air inlet. Since there are multiple air inlets, it is more convenient to absorb harmful gases. However, when dust is absorbed, multiple air inlets cause the dust to scatter around, which affects the experimenters. operate. Contents of the invention [0...

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Problems solved by technology

[0003] In the past, the fume hood sucked and discharged the harmful gas through the deflector installed inside the cabinet and the negative pressure fan installed on the top of the cabinet. There is a gap between the two deflectors, and the gap forms an air inlet. Since there are multiple air inlets, it is more convenient to absorb harmful gases. However, when dust is absorbed, multiple air inlets cause the dust to scatter around, which affects the experimenters. operate

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