Air-filtering protection device

An air-filtering protection device, comprising:

• at least one filtering mask being made of a graphene-doping material and being adapted to be worn to filter air, the at least one filtering mask comprising at least one first coupling element wherein the first coupling element has a first air channel running through an inner surface and an outer surface of the filtering mask, and a filtering element is disposed in the first air channel;
• and
• at least one actuating and sensing device comprising at least one second coupling element, the at least one second coupling element being engaged with the at least one first coupling element of the filtering mask for allowing the at least one actuating and sensing device to be detachably mounted on the at least one filtering mask, wherein the at least one actuating and sensing device comprises at least one sensor, at least one piezoelectric pump, at least one microprocessor, at least one power controller and at least one data transceiver, the at least one piezoelectric pump is disposed on one side of the at least one sensor and comprises at least one guiding channel, the at least one piezoelectric pump is enabled to transport at least one air to flow toward the at least one sensor through the at least one guiding channel so as to make the air sensed by the at least one sensor;
• wherein the at least one piezoelectric pump is enabled to transport the air in different flow rates in accordance with an air quality information when the at least one actuating and sensing device is mounted on the at least one filtering mask and the at least one filtering mask is worn by a user, so as to adjust the air inside the at least one filtering mask for maintaining the air quality;
• wherein each of the at least one piezoelectric pump comprises:
• a gas inlet plate having at least one inlet, at least one convergence channel and a central cavity defining a convergence chamber, wherein the at least one inlet allows the air to flow in, and the at least one convergence channel is disposed corresponding to the at least one inlet and guides the air from the at least one inlet toward the convergence chamber defined by the central cavity;
• a resonance plate having a central aperture and a movable part, wherein the central aperture is aligned with the convergence chamber and the movable part surrounds the central aperture;
• a piezoelectric actuator aligned with the resonance plate;
• a first insulation plate;
• a conducting plate;
• and
• a second insulation plate;
• wherein a gap is formed between the resonance plate and the piezoelectric actuator to define a first chamber, so that the air from the at least one inlet of the gas inlet plate is converged to the central cavity along the at least one convergence channel and flows into the first chamber through the central aperture of the resonance plate when the piezoelectric actuator is enabled, whereby the air is further transferred through a resonance between the piezoelectric actuator and the movable part of the resonance plate;
• wherein the gas inlet plate, the resonance plate, the piezoelectric actuator, the first insulation plate, the conducting plate and the second insulation plate are sequentially stacked.