Clean workbench capable of freely switching positive pressure and negative pressure

The utility model discloses a clean bench capable of randomly converting positive pressure and negative pressure, which comprises a case, a bench surface arranged in the case, and a high-efficiency filter and a fan assembly which are arranged above the bench surface, the top of the case is provided...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YIN XIAOPING, CHANG XIUMEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	AIR-CONDITIONING, AIR-HUMIDIFICATION, VENTILATION, USE OF AIRCURRENTS FOR SCREENING BLASTING CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL RANGES TRANSPORTING VENTILATING WEAPONS
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Beschreibung
Zusammenfassung:	The utility model discloses a clean bench capable of randomly converting positive pressure and negative pressure, which comprises a case, a bench surface arranged in the case, and a high-efficiency filter and a fan assembly which are arranged above the bench surface, the top of the case is provided with an air port, and the clean bench is characterized in that the fan assembly comprises at least one fan, a fan mounting plate and a rotating mechanism, the fan is fixed on the fan mounting plate and contained in an air bellow close to the top of the case, the height of the air bellow is larger than the diameter of the fan, the rotating mechanism comprises a rotating shaft, a shaft hole is formed in the side edge of the air bellow, and the rotating shaft penetrates through the corresponding shaft hole and extends to be close to the outer side surface of the shaft hole of the air bellow. And the rotating shaft rotates in the shaft hole, so that the fan has the degree of freedom of overturning in the air box. Accor