| 摘要 |
FIELD: ventilation. ^ SUBSTANCE: in an air conditioning system with combined indirect cooling, comprising a ventilation cooling tower installed on a roof of a conditioned room, and in the lower part of the ventilation cooling tower there is a tray for collection of cooling water, besides, in a vessel above the tray there are ejecting holes for external air inflow, and in the upper part of the cooling tower vessel there is a spraying device with nozzles and an axial fan, besides, a conditioner comprises a centrifugal fan supplying air into a room, an oil self-cleaning filter, a heat exchange device, a spray chamber connected by a pipeline to a centrifugal pump, and also supply and exhaust shafts, having a common wall that separates them, at the same time the automatic valve controls supply of external and recirculating air via the filter from the room, the vessel of each nozzle in the spray device of the cooling tower and in the spray chamber of the conditioner is hollow, axisymmetric, its axis is perpendicular to the axis of the header pipe, and the vessel shape is a solid of revolution formed by a second-order curve, for instance, as spherical, in the form of a truncated ellipsoid or paraboloid of revolution, and at the side of a flow hole of the header pipe in the nozzle there is a straightening element arranged in the form of a ring, having a central bushing, with at least three rigidly connected radial blades that are joined with the nozzle vessel, besides, the vessel is made with two opposite ledges arranged perpendicularly to the axis of the nozzle, by means of which the nozzle is fixed on the header via yokes with locks, at the same time in the lower part of the nozzle vessel there is a conical throttling hole connected with a mixing chamber, which is installed between the throttling hole and the straightening element, and at the inner surface of the mixing chamber there are helical grooves. ^ EFFECT: higher efficiency and reliability of a process of automatic control of double-fan conditioners. ^ 2 dwg |
