| 摘要 |
ventilation technique; ventilation of domestic and industrial rooms. SUBSTANCE: according to first version, ventilation plant includes fan arranged in duct with rectangular cross- section and provided with spiral casing with tangential outlet part which is communicated with air distributing line; it has two bends inside duct in mutually perpendicular planes; first bend has form of diffuser. According to second version, spiral casing is additionally provided with second tangential outlet part and second air distributing line communicated with said part, second air distributing line is parallel to first air distributing line on opposite side of duct. Such version makes it possible to position axis of rotation of impeller along flow of air at inlet and outlet of ventilation plant, i.e. in direction where dimension of plant are not so limited by mounting requirements. Installation of electric motor in said direction makes it possible to reduce sizes of plant in other axes. EFFECT: enhanced efficiency due to reduction of aerodynamic losses; enhanced compactness. 7 cl, 8 dwg
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