AIR FILTER Russian patent published in 2021 - IPC B60H3/00 

FIELD: air purification.

SUBSTANCE: air filter consists of a pipe, one hole whereof is covered with filtering paper and hermetically connected with an air pump. The air pump (1) is hermetically connected with the pipe (2) through the cone-shaped hole thereof. The air passes between the gaps in the paper (6) and exits through the air pump (1). Microparticles stick to the layers of paper. The paper is unfolded and cut near the protrusions (7). Microparticles are removed from the cuts of paper on both sides onto the plates of an electronic microscope.

EFFECT: determination and study of microparticles present in the air is achieved using an air filter.

1 cl, 3 dwg