Personal nanoparticle sampler
AssigneeInstitution of Occupational Safety and Health
InventorsShi-Nian Uang, Tung-Sheng Shih, Chuen-Jinn Tsai, Cheng-Han Wu
Life of this patent
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Abstract
A personal nanoparticle sampler is disclosed to include a pre-classifier, a nozzle, a connector and a final filter pack. The connector and the final filter pack respectively accommodate a particle-sizing filter and a final filter to collect nanoparticles smaller than a diameter. The pre-classifier removes large particles to avoid clogging of the connector. The nozzle raises the airflow velocity to reduce the cut-off diameter of the particle-sizing filter without increasing the total flowrate, allowing the personal nanoparticle sampler to be used with a personal sampling pump.
Claims11
A personal nanoparticle sampler comprising:
- a pre-classifier having a first chamber and an air inlet extending from the said first chamber to the outside of the said pre-classifier;
- a nozzle connected to said pre-classifier, the said nozzle having a passage disposed in connection with the said first chamber of the said pre-classifier, the said passage having a cross section gradually reducing in the direction apart from said first chamber;
- a connector connected to one end of the said nozzle opposite to the said pre-classifier, the said connector having a second chamber disposed in connection with the said passage of the said nozzle;
- a final filter pack connected to the said connector, the said final filter pack having a third chamber and a suction passage, the said third chamber disposed in connection with the said second chamber of the said connector, the said suction passage extending from the said third chamber to the outside of the said final filter pack;
- and
- a rack having a top plate, two sliding rods, a bottom plate, and two springs, the said top plate being stopped outside the said final filter pack, the said sliding rods being connected to the said top plate, the said bottom plate being coupled to the periphery of the said pre-classifier and movable along the said sliding rods, the said springs being bilaterally connected between the said top plate and the said bottom plate.
Dependencies are inferred from the claim text.