Patent ID: 7563296

Claim:
A pervasive dedusting device for a vacuum cleaner, which includes a tank with a wind inlet and a wind outlet, characterized in that the tank is provided with a first cyclone device and a second cyclone device; the first cyclone device includes a filter barrel while the second cyclone device includes a cyclone barrel disposed inside the filter barrel, the cyclone barrel is configured to be a conical barrel with a smaller upper end and a larger lower end and a cyclone wind inlet is disposed on it; the wind inlet on the tank and the cyclone wind inlet on the cyclone barrel are separated by the filter barrel and located in two chambers respectively; a wind outlet tube is located in the upper end of the cyclone barrel and communicates with the wind outlet; and the filter barrel has a cylindrical portion with a cylindrical sidewall including a cylindrical lower inner wall, the larger lower end of the cyclone barrel has a lower outer wall, the lower inner wall of the filter barrel is connected tightly to the lower outer wall of the cyclone barrel.