Install a muffler on the exhaust duct at the front end of the fan to reduce noise pollution

Ventilation and exhaust of the ventilation and exhaust system detection room includes detection of exhaust gas discharge, replacement of fresh air, fume hood exhaust and biological safety cabinet exhaust. The key point to mention is the laboratory variable air volume control system, which can automatically adjust the exhaust air power of the inverter fan according to the detection of exhaust gas discharge, laboratory ventilation, and the number of ventilation cabinets to achieve efficient exhaust ventilation.

During the detection of exhaust gas emission detection, some exhaust gas is generated, such as an atomic absorption spectrophotometer, an atomic fluorescence spectrophotometer, a gas chromatograph, etc., which need to be collected by an atomic suction hood and then discharged outside through an exhaust duct. There are two installation positions of the fan, one is installed in the indoor ceiling, the exhaust effect is relatively good, but the noise generated is also large; the other is installed on the roof, and the exhaust is exhausted by the fan to generate the suction force. Discharge, resulting in less noise, adopted by most laboratories. A muffler is usually installed on the exhaust duct at the front end of the fan to reduce noise pollution.

The chemical reagents used in the laboratory ventilation test will volatilize and will spread to the environment of the test chamber, causing the ambient air to be turbid, and the air needs to be updated in time. In addition, after the detection chamber is vented to the outside, a negative pressure in the room is formed, and fresh air needs to be added. The laboratory exchange of fresh air can be achieved through the air supply system, which will detect the outdoor air and send it to the room through the air duct source. In the sterile room and transgenic detection area, fresh air should also be filtered, dusted and sterilized to ensure clean air.

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