Anhui bench production

 2.3 air curtain fume hood due to the high energy density of the jet speed slow decay, therefore, in order to overcome the problems of traditional fume hood, fume hood was designed with an outlet, the outlet at the outer edge of the center line and operating mouth a vertical line through the outlet sent jets (air curtain) to operate the fume hood closed mouth, the pest control in a fume hood, and discharged together with harmful substances. This fume hood with air outlet is called air curtain fume hood. In fact, the air curtain fume hood ventilation system and is known to blow suction ventilation system. Air supply system which is characterized by the small amount of outdoor air or indoor air through the slit-type outlet sent, use exhaust from the fume hood exhaust, then will exhibit negative pressure inside the fume hood, so there is a pressure on both sides of the jet difference △ P, the jet deflection under the effect of the pressure difference △ P, when the ratio of supply and exhaust when appropriate, the jet just to operate the fume hood opening is completely closed. Study found that air curtain fume hood compared to traditional fume hood, if the air outlet is sent leopard drawn from outside, whether it is sent to the bottom feed formula or formula can be less drain away 80% 6} I on indoor air cooling or heating load can save more than 80, if the outlet is sent from the indoor air extraction can also write less drain away more than 75 indoor air, you can save cooling load or heat load of 75% or more. Aspirated test can also be seen on-screen energy savings slightly above the fume hood aspirated curtain fume hood energy savings. Another study results also show that for the same air volume, with the increase in the width of the outlet, the need to reduce the amount of exhaust that indoor air entrainment reduce the amount of cold or heat consumption is also reduced, the energy saving effect is like ; on the contrary, for the same air volume, increases with height-through fume hoods, exhaust flow needed that entrainment increase indoor air, cold or heat consumption increases, the energy saving effect is sent . Thus, for saving the draft to be, under certain circumstances, an appropriate increase in the width of the outlet, or appropriate to reduce the height of the fume hood operation of ports it is a great advantage. Air curtain air fume hood despite an increase in power consumption, but the fume hood exhaust air curtain is greatly reduced, exhaust power consumption is greatly reduced, so comprehensive and education, energy efficiency air curtain fume hood is great , some issues have yet to be studied further. Further energy savings are also fume hood temperature and harmful substances, the fume hood structure, system design, installation and other factors are closely related is reasonable, as long as the majority of leisure through professional and technical workers, depending on the circumstances, the courage to explore, will save more energy . Fume Hood www.ahktsy.net