PRESSURE UNIT (EMBODIMENTS), VEHICLE (EMBODIMENTS) AND METHOD OF CHANGING AIR FLOW RATE Russian patent published in 2019 - IPC B60H1/00 

FIELD: heating; ventilation.

SUBSTANCE: invention relates to heating, ventilation and air conditioning systems in vehicles. Injection unit includes a housing comprising a wall in the form of a volute, an electric motor comprising an output shaft extending in the housing, a blade wheel located in the housing and mounted on the output shaft, to create air flow along air flow path in housing, air flow outlet and volute cutoff. Volute dissector forms, in fact, a continuous surface with a wall on the downstream end and with the outlet of the air flow on the upstream end along the air flow path in the first position. Injection unit also includes an actuator for movement of the volute cutoff along a projection extending from the wall in the form of a volute adjacent to the adjacent downstream end of the volute cutoff from the first position to the second position to reduce the air flow. Volute cutoff may include more than one element.

EFFECT: reduced noise, vibration and movement irregularity.

20 cl, 4 dwg