VENTILATION DUCT SYSTEM Russian patent published in 2022 - IPC B60H1/00 B61D27/00 B60P3/20 

FIELD: ventilation.

SUBSTANCE: invention relates to the field of a railway refrigerator rolling stock and more specifically to a ventilation duct system. The ventilation duct system, in one option, includes first part (10) directing an airflow, including upper plate (11) and first lower plate (12) located below upper plate (11), and second part (20) directing an airflow, connected to first part (10). First lower plate (12) and upper plate (11) have a gap between them, and the first ventilation duct is located between first lower plate (12) and upper plate (11). The second ventilation duct is located in second part (20), and it communicates with the first ventilation duct. Upper plate (11) and second part (20) have an arc-shaped structure. Convex extension of second part (20) and upper plate (11) are facing in one direction. In another option, upper plate (11) and first lower plate (12) are connected by means of first installation site (30) including the first folded plate connected to upper plate (11), the second folded plate connected to first lower plate (12), and the third folded plate connected to the first folded plate and the second folded plate. The third folded plate is located between upper plate (11) and first lower plate (12). At least one ventilation hole is made in the third folded plate.

EFFECT: invention solves the problem of a large volume of a ventilation duct system, existing in this field of technology.

12 cl, 10 dwg