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The role of high-efficiency exhaust units
The role of high-efficiency exhaust units(I) Purifying airHigh-efficiency exhaust units play an important role in purifying air. In places such as computer rooms, when the indoor host is running, fresh air from the outside is introduced from the window inlet, and under the pressure field formed by the host, it reaches the indoor activity area to meet the needs of personnel activities. After that, the dirty air passes through the exhaust vents and exhaust ducts to the outside. The wall-type air inlet opens a hole in the wall to introduce fresh air from the outside. The indoor air will be filtered out of dust, odor, pollen particles, etc. through the wall-type air inlet, ensuring that the air entering the room is fresh and pure. At the same time, the indoor exhaust vents can be set on the exhaust duct or the wall of the bathroom, so that users can eliminate indoor dirty air and odors. For example, under the action of the exhaust unit, the one-way fresh air system discharges indoor exhaust gas to the outside in an organized manner, while forming indoor negative pressure and introducing wind from the living room, living room, bedroom, study, etc., to achieve the purpose of indoor ventilation. In these ways, high-efficiency exhaust units create a clean and healthy air environment for places such as computer rooms. (II) Energy saving and noise reduction The high-efficiency exhaust unit has the characteristics of small size and low noise. It uses a high-pressure, large-flow fan, relying on mechanical force to supply air to the room from one side, and exhausts it to the outside from the other side with a specially designed exhaust fan to force a fresh air flow field in the system. While supplying air, the air entering the room is filtered, disinfected, sterilized, oxygenated, preheated (in winter), and other energy-saving treatments. For example, for 2p and 4p explosion-proof motors, when strong noise occurs, the outer diameter and blades of the fan can be reduced, or the air intake can be reduced, which can effectively reduce the existence of noise. For the air duct design, sudden changes and sharp turns of airflow can be avoided, and a streamlined design form can be adopted. For example, a 45-degree chamfer can be used on the base and air inlet during design, and the chamfer can be used at the air inlet end of the fan blade to reduce noise. In addition, the noise of the exhaust fan can be reduced by optimizing the design, regular maintenance, and using noise reduction materials. (III) Meeting specific needs In biosafety laboratories, high-efficiency exhaust units can be disinfected and leak-checked in situ to ensure the safety of personnel and the environment and meet the requirements for the construction of high-level biosafety facilities. The ducted exhaust high-efficiency filtration devices used in domestic high-level biosafety laboratories are all equipped with the conditions for safely replacing high-efficiency air filters using airtight bags, that is, using bag-in-bag-out high-efficiency air filtration devices. This device is designed and manufactured by the provisions of "General Requirements for Laboratory Biosafety" GB 19489-2008 that "exhaust high-efficiency filters should be disinfected and sterilized in situ and leak-checked online". Single and multiple units, single-stage filtration, and double-stage filtration can be combined according to the laboratory air volume and specific needs. For example, the exhaust high-efficiency filtration devices of level 3 and level 4 biosafety laboratories should be installed at the indoor exhaust outlet or close to the exhaust outlet. The location of the high-efficiency filter in the protection area and the exhaust outlet structure should facilitate safe replacement and leak detection of the filter. Both ends of the ducted exhaust high-efficiency filtration device are equipped with biosafety closed valves to facilitate in-situ disinfection and sterilization of the device, ensuring that the operator never comes into contact with the inside of the filtration system, thereby ensuring the safety of personnel and the environment. |
