SU846759A2 - Air stream switch - Google Patents

Description

(54) AIR FLOW SWITCH

one

The invention relates to devices intended for reversing a jet and switching working and standby fans in ventilation systems equipped with air heaters for heating the air supplied to the shaft.

According to the main author. St. No. 608952 known air flow switch, comprising a housing with nozzles, made open to the atmosphere, a knee, a cantilever shaft, supporting rollers and a locking element - variable radius of curvature, equipped with a ring lining attached to the edge of the outlet of the knee 1.

The disadvantage of this switch is that its case is not suitable for placing heaters on it that are intended to preheat the air supplied to the shaft.

The purpose of the invention is to reduce capital and operating costs by reducing the size of the air handling unit by placing the air heaters directly on the air flow switch.

The goal is achieved by the fact that the switch is equipped with a fixed

parts of the body open to the atmosphere, a grille for placing heaters.

FIG. 1 shows a switch, a plan view, conditionally, without a grill for accommodating heaters; in fig. 2 - the same, with the presence of a lattice for accommodating calofan; in fig. 3.- section A-A in FIG. one; in fig. 4 - ventilation unit with the proposed switch.

The air flow switch includes a housing 1 open to the atmosphere, with side cutting 2 and end 3 cuttings, a cantilever shaft 4, a knee 5 fixed to a cantilever shaft, a locking element 6 made according to a variable radius curve and distorted by an annular overlay attached to the output edge the holes

15 knees. The entrance part of the knee is sealed with the cover plate 7 and contacts the switch body by means of rollers 8. The side connections around the perimeter are provided with elastic covers 9. Part of the body open to the atmosphere is equipped with a grille

 10, which is adapted to accommodate heaters on it. To rotate the knee inside the housing, a drive 11 is located. The suction 12 and discharge 13 air ducts of the working fan 14 and the backup fan 15 are connected to the side nozzles of the switch, the end nozzle of the switch is connected to the ventilation duct of the shaft 16. On the grid of the switch, there are radiator 17 .

The switch works as follows.

When the wheel 5 is rotated to its original position, the locking element 6, due to the variable radius of curvature, presses the elastic pads 9 and ensures that the wheel 5 is tightly connected to one of the side nozzles 2. Thus, the air flow moves along the way (shown by a solid line); atmosphere - coolers 17 - pipe 2, intake air 12 - working fan 14 - discharge air duct 13 - pipe 2, wheel 5, end pipe. pipe 3 - shaft ventilation channel 16. If wheel 5 is rotated, this side pair is switched nozzles 2 and the jet reversal occurs (the path is shown by a dotted line). Further rotation of the elbow 5 provides a similar connection for the other pair of side nozzles, and thus makes the transition to the backup fan 15.

Due to the presence of a grill attached to the part of the housing open to the atmosphere for accommodating the heaters, the latter are placed directly on the air flow switch and therefore the air ducts have a minimum length, which reduces the size of the ventilation unit equipped with heaters and, consequently, reduces capital and operational costs about 30,000 p. on one installation.

Claims (1)

Invention Formula Air flow switch on the bus. St. No. 608952, characterized in that, in order to reduce capital and operating costs by reducing the size of the air handling unit by removing heaters directly on the air flow switch, it is equipped fixed on the part of the body, open to the atmosphere, lattice for placement of heaters. Sources of information taken into account in the examination 1 USSR Author's Certificate No. 608952, cl. E 21 F 1/08, 1976.