Environmental protection equipment in operation through the multi-stage high-pressure fan and other equipment will be pumped into vacuum inside the barrel, so that the negative pressure rises rapidly, high negative pressure so that the air quickly through the inlet into the barrel inside the barrel, the barrel over the suction brush and suction pipe, the flow of air to carry the need to collect and deal with the solid particles into the barrel, the filter bag and the inlet connected to the solid is attached to the internal surface of the filter bag, the initial filtration of the air The primary filtered air passes through the gap of the filter bag and then through the secondary filtration of the filter element, which can make the air reach the standard of emission. The filtered air enters the exhaust duct through the exhaust port of the blower or air pump, and is finally discharged back to the interior of the workshop to minimize the loss of energy, especially the heat energy. The higher the negative pressure, the stronger the suction, the wider the caliber of the suction port, then the flow rate increases, the corresponding negative pressure becomes smaller, the suction becomes smaller, by choosing the right model, the negative pressure can be kept within a constant range to adapt to the different materials sucked up and processed. For more information, please contact 4001/168=88/178