What kind of clean air ventilation cabinet is safe?

we all know that the role of ventilation cabinets in the laboratory is very important, but also has a troubling problem: that is, the energy consumption of ventilation cabinets is very large! This and China in recent years to promote energy conservation and emission reduction, the concept of sustainable development is in conflict with each other, laboratory ventilation cabinet energy consumption deserves to pay close attention toA common ventilation cabinet works 8-10 hours a day, if not 24 hours, and discharges 1200-1500 cubic meters of laboratory air per hourLaboratory must be equipped with air conditioning systems to ensure constant temperature and constant humidity in the laboratory to ensure the accuracy of the experiment, but air conditioning-based heating and cooling is often easily discharged by the piping systemThe average annual loss of a ventilation cabinet is about 17,000 yuanalso, the exhaust-type ventilation cabinet will also have direct or indirect damage to the ecological environmentThe immediate damage is due to the fact that many residential areas and office buildings near laboratories are often contaminated with chemical emissions from ventilation cabinet pipesThe indirect reason is that the main source of electricity in China is coalA U.Sstudy showed that the energy consumption of laboratory ventilation cabinets (about 7.5 million in the U.S., roughly close to China's) equates to the energy generated by the ongoing generation of electricity from at least 12 250 megawatts of power plants, which emit sulfur dioxide (acid rain) and carbon dioxide (which creates a greenhouse effect)one solutionis to reduce the amount of exhaust air in the outer exhaust of the ventilation cabinetThis method is mainly used with the help of vaV systems (variable air volume control systems), but installing VAV systems is complex and expensive, and it takes a long time to recover the installation costs from the energy savings it bringsImportantly, the VAV system will lose its energy-saving role if the experimenters do not develop good habits to pay attention to the opening heightAnother solution is to use a tubeless air-free ventilation cabinetThese vents are equipped with activated carbon filters that absorb the chemical gases generated during operation, and when filtered, clean air will circulate indoors rather than being discharged outdoorsIt has two outstanding advantages: one is not the indoor air, thus saving a lot of energy consumption; In addition, its flexibility is outstanding, requiring only a power outlet, which can be placed in any location in the lab Based on the outstanding characteristics of the tubeless clean air type ventilation cabinet, it will become the main protective tool for chemical operation in the chemical laboratory of the future What kind of clean air ventilation cabinet is safe? Anyone with some knowledge of chemistry knows that the life of a filter depends on the type of chemical it absorbs and the amount of volatility of the chemical it corresponds to, as well as the environment in which the filter is located, such as temperature and humidity So can not generally say that the life of the filter is one year, which raises a very critical question, how to accurately judge the filter saturation time, because if the filter is saturated and the end can be found in time or detected, it will immediately lead from safety to insecurity, so production enterprises must highlight the online monitoring system to accurately inform customers in a timely manner therefore, in order to achieve energy savingand and at the same time to ensure safety purposes, the clean air type ventilation cabinet is a good choice Moreover, the clean air type ventilation cabinet can not only ensure the safety of the experiment and experiment personnel, but also can achieve the goal of energy saving and emission reduction, fish and bear palm both, why not?