LOCAL AIR CLEANER Russian patent published in 2017 - IPC F24F7/06 F24F11/04 

FIELD: ventilation.

SUBSTANCE: local air cleaning device includes an air supply fan having a through surface for the air flow through which a uniform flow of purified air is blown and an air duct located on the side of the supply fan having a passage surface for the airflow and passing from this side to the outlet side of the uniform airflow with formation of a through surface at the end portion of the discharge side, the supply fan being designed so that the uniform cleaned airflow blown from the airflow passage passes through the air duct inside it, then collides with the air-impact collision surface at the outlet side of the duct surface; the passage surface of the duct is spaced apart from the airflow collision surface and is located opposite to it, forming an open area between the air duct passage surface and the airflow collision surface; and a uniform clean airflow blown from the air flow passage surface collides with the airflow collision surface and passes outwardly of the open area so that purity higher than in the other areas is provided inside the duct and inside the open area. The local air purification device also includes at least one means for measurement of pressures inside the duct and inside the supply fan, means for measurement of cleanliness within the duct or open area, and means for measurement of the area of the space between the duct and the surface of the airflow collision; and the local air cleaning device is configured to provide cleanliness based on the measurement result by controlling the rate of a uniform flow of purified air blown from the airflow passage, so that it can be reduced or increased.

EFFECT: creation of a device for local air cleaning, where energy consumption can be reduced provided that a high level of cleanliness in the clean air space is maintained.

4 cl, 11 dwg