Noise prevention device for exhaust fan

The utility model provides a noise prevention device for an exhaust fan. At present, when a refrigerator, an air conditioner, an air heater and the like are operated, exhaust fans are needed for driving air to flow in and flow out of the electric appliances, and therefore high noise can be generated...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HAN TIANBO, YU WEIHE, LI SHUQIN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING HEATING LIGHTING MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS WEAPONS
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Beschreibung
Zusammenfassung:	The utility model provides a noise prevention device for an exhaust fan. At present, when a refrigerator, an air conditioner, an air heater and the like are operated, exhaust fans are needed for driving air to flow in and flow out of the electric appliances, and therefore high noise can be generated; most common noise prevention devices are simple and crude and are not obvious in single effect. The noise prevention device for the exhaust comprises the exhaust fan (1) and is characterized in that the exhaust fan is provided with an exhaust fan air inlet (2) and an exhaust fan air outlet (3), the exhaust fan air outlet is connected with a noise reduction device (4), and the noise reduction device comprises three metal channels. The noise prevention device is used for exhaust fans.