Novel energy-saving environment-friendly numerical-control fume hood of laboratory

Abstract

The invention discloses a novel energy-saving environment-friendly numerical-control fume hood of a laboratory. The novel energy-saving environment-friendly numerical-control fume hood comprises a cabinet, a sliding window, a deflector and a numerical control system. The deflector is provided with a plurality of guide holes; air outside the fume hood flows into an inner cavity of the cabinet after the sliding window is opened; and under guiding of the deflector, gas generated in a testing area is exhausted from the guide holes of the deflector. The numerical control system comprises an automatic sliding window controller, a non-contact sliding window controller, a face velocity controller and a system controller. The automatic sliding window controller is used for detecting whether operators work in an operation area in front of the fume hood or not so as to automatically increase or decrease openness of the sliding window. The non-contact sliding window controller is used for the operators to open the sliding window to a required position in a non-contact way. The face velocity controller is used for regulating exhaust rate of the fume hood automatically according to the openness of the sliding window, and sending the exhaust rate and running states of the fume hood to the system controller so as to regulate running frequencies of an exhaust fan and an air supplement fan.

Description

technical field [0001] The invention relates to the technical field of laboratory equipment manufacturing, in particular to a novel energy-saving and environment-friendly laboratory numerical control 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, and it can be removed by fume hood, fume hood or local ventilation. [0003] 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 produced during experimental operations. In order to protect the safety of users To prevent the pollutants in the experiment from spreadi...

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Problems solved by technology

[0012] However, the deflector in the fume hood disclosed by the Chinese invention patent CN 1287914C belongs to a blind plate. When the gas flow entering the work area suddenly increases, for example, the ventilation When the movable sliding window in front of the cabinet is suddenly opened from the fully closed state (opening degree is zero) to increase the opening degree, at the moment of opening, it is easy to generate airflow vortex in the working area (at this time, the airflow on the upper part of the deflector suddenly increases. Large), the formed vortex will bring the harmful gas out of the fume hood through the opening of the sliding window, thus causing the gas to escape

[0013] In addition, 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, but 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; while the low surface wind speed will inevitably cause the escape of pollutants and endanger the safety of test personnel

[0014] At present, most of the sliding windows of fume hoods (which can move up and down or left and right) used in laboratories are manually operated, and relying on human hands to control the movement of sliding windows will have the following problems : First of all, when people leave the test bench, they tend to forget to close the windows and doors, which will cause a large amount of ventilation and cause 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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