Laboratory variable-air-volume ventilation cabinet

Abstract

The invention discloses a laboratory variable-air-volume ventilation cabinet. The variable-air-volume ventilation cabinet comprises a cabinet body, a slide viewing window, a spoiler, a viewing window control device, a surface wind speed control device, a pipe static pressure control device, an environment monitoring device, a central integrated control device and a variable frequency fan; the spoiler is positioned in the cabinet body, and is mounted on the inner wall of the cabinet body opposite to the slide viewing window; an exhaust channel is formed between the spoiler and the inner wall of the cabinet body; an exhaust port connected with the exhaust channel is formed in the top of the cabinet body; the variable frequency fan is connected with the surface wind speed control device; the surface wind speed control device is connected with a wind guide top plate through an exhaust pipe; and the pipe static pressure control device is connected with the variable frequency fan. The variable-air-volume ventilation cabinet with the structure can effectively control the direction of waster gas currents therein in real time, maintains uniform surface wind speed thereof, prevents eddy currents formed therein to cause overflowing of the waste gas, and guarantees effective elimination of harmful gas to protect the health of experimenters.

Description

technical field [0001] The invention relates to the technical field of laboratory equipment manufacturing, in particular to a laboratory variable air volume fume hood. Background technique [0002] Laboratory ventilation is an integral part of laboratory design. In order to prevent laboratory workers from inhaling or inhaling some toxic, pathogenic or toxic chemicals and organisms, and to prevent the absorption of some vapors, gases and particles (smoke, soot, dust and aerosols), There should be good ventilation in the laboratory, which can be removed by fume hood, fume hood or local ventilation. The most important function of the fume hood is the exhaust function. In the chemical laboratory, various harmful gases, Odor, moisture, and flammable, explosive, and corrosive substances, in order to protect the safety of users and prevent the pollutants in the experiment from spreading to the laboratory, fume hoods should be used near the pollution source. In the past, the number...

AI Technical Summary

Problems solved by technology

In order to prevent laboratory workers from inhaling or inhaling some toxic, pathogenic or toxic chemicals and organisms, and to prevent the absorption of some vapors, gases and particles (smoke, soot, dust and aerosols), There should be good ventilation in the laboratory, which can be removed by fume hood, fume hood or local ventilation. The most important function of the fume hood is the exhaust function. In the chemical laboratory, various harmful gases, Odor, moisture, and flammable, explosive, and corrosive substances, in order to protect the safety of users and prevent the pollutants in the experiment from spreading to the laboratory, fume hoods should be used near the pollution source. In the past, the number of fume hoods used was small. It is only used in experiments with particularly harmful and dangerous gases and large amounts of heat. The fume hoods currently used in laboratories are usually constant air volume fume hoods, that is, the exhaust air volume of each fume hood is fixed. However, the actual During the test operation in the fume hood, different amounts of pollutant gases are often produced due to different tests

If a traditional constant air volume fume hood is used for exhaust treatment, the excessively high face velocity may cause airflow disturbance in the space above the experimental table in the fume hood, pollutants may accumulate in a certain corner of the cabinet, and the flame may be blown out. Destroy the ongoing test and cause a certain amount of energy waste; and the low surface wind speed will inevitably cause the escape of pollutants and endanger the safety of test personnel

[0003] At present, most of the sliding windows (which can move up and down or left and right) of the fume hoods used in the laboratory are manually operated, and relying on human hands to control the movement of the sliding windows will have the following problems: First, when people leave the test bench, it is easy to forget to close the window door, this will still lead to a large amount of ventilation, resulting in energy waste, which is not conducive to energy saving

Secondly, when the testers are busy, their hands may be stained with acid and alkali, so when they accidentally touch the sliding window, it is easy to leak acid and alkali on the outer surface of the sliding window, causing unsafe phenomena, and also Inconvenient to operate

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