RU2715568C1 - Air distributor - Google Patents

Abstract

FIELD: ventilation and air conditioning.

SUBSTANCE: invention relates to ventilation and air conditioning equipment and can be used for distribution of supply air to premises for various purposes. In air distributing device containing housing with outlet opening and air supply branch pipe, and resistance to flow in housing, including stretched element, and possibility of perpendicular placement, wherein housing is made in form of diffuser, in form of hollow truncated cone, in larger base of which end outlet hole is located, and in smaller base – end inlet hole communicated with pipe, wherein resistance to flow is located in cone cavity and is made in form of sphere fixed on located perpendicular to cone axis of elastic double-end thread, ends of which are fixed on cone wall opposite to each other with provision of elastic stretching of thread, note here that cone thread and axis cross geometrical center of sphere aligned with cone passage section overlapping.

EFFECT: design of an air distributing device having wider functional and technological capabilities and higher degree of stabilization of the supply jet speed at variable air flow rates and providing high intensity of damping of the supply jet speed.

5 cl, 1 dwg

Description

The invention relates to ventilation and air conditioning and can be used to supply fresh air to rooms and objects for various purposes.

Known is an air distribution device comprising a housing with an air supply pipe and an outlet window and a flow equalizing resistance located in the housing (USSR Copyright Certificate for the Invention No. 561051, publ. 05.06.1977, Bull. No. 21).

This air distributor cannot stabilize the speed of the supply jet at variable air flow rates.

An air distribution device containing a housing with an air supply pipe and an outlet window, and a resistance equalizing flow placed in the housing, which is made in the form of a lattice located perpendicular to the air flow and formed by strings (USSR Copyright Certificate No. 898222, publ. 15.01. 1982, Bull. No. 2).

Such an air distributor is not able to provide stabilization of the supply air velocity at variable air flow rates and does not have a sufficiently wide range of functional and technological capabilities.

The objective of the invention is the creation of such an air distribution device (ASU), which has broader functional and technological capabilities in terms of blocking the inlet, as a non-return valve, while ensuring a high rate of attenuation of the speed of the supply jet and stabilization of its speed at variable air flow rates. Additional technical results also include the reduction of air leakages by sealing the gap and the expansion of functional and technological capabilities in terms of improving fire safety and fire resistance of the supply air duct network.

This is achieved by the fact that, in contrast to the known technical solution, to expand the functional and technological capabilities while ensuring stabilization of the supply jet velocity at variable air flow rates and a high attenuation rate of the supply jet velocity, in an air distribution device comprising a housing with an exhaust window and an air inlet , and the flow resistance located in the housing, including the stretched element, and the possibility of perpendicular placement, while the housing is made in an ide of a diffuser, in the form of a hollow truncated cone, in the larger base of which there is an end outlet, and in the smaller base - end inlet in communication with the nozzle, the flow resistance being located in the cavity and made in the form of a sphere mounted on the cone axis perpendicular to the axis, an elastic double-end thread, the ends of which are fixed to the wall of the cone opposite to each other with elastic stretching of the thread, while the thread and the axis of the cone intersect the geometric center of the sphere, to Thoraya oriented overlapping flow cross section of the cone.

Also, the reduction of air leakage is facilitated by the fact that the wall of the cone inside is covered with a layer of elastic material with the possibility of elastically deformable contact with the sphere.

In addition, the expansion of functional and technological capabilities in terms of improving fire safety and fire resistance of the supply air duct network is facilitated by the fact that the layer of elastic material consists of rubber with a porous structure and reactive ingredients of the flame retardant composition, for example, Ograx - l, fire - trm, with the possibility thermal expansion at an increase in temperature with the formation of foam coke for fire protection and overlapping the passage section of the cone and pipe.

Increasing fire safety and fire resistance of the supply air duct network is facilitated by the fact that the cone and pipe are made of metal with high thermal conductivity.

Also, the cone is vertically oriented, while the sphere is located above the nozzle contributes to increasing fire safety and fire resistance of the supply air duct network.

The essence of the claimed technical solution is illustrated by the drawing, which shows a schematic representation of an air distribution device (section).

The device comprises a hollow truncated cone 1 with an end outlet 2, a pipe 3 for supplying air, an end inlet 4, a sphere 5, a two-end elastic thread 6 and a layer of elastic material 7.

The device operates as follows.

The supply air enters through the nozzle 3 and the inlet 4 into the cavity of the cone 1, acts on the sphere 5 mounted on the elastic thread 6, and the supply air flows into the room through the outlet 2 of the cone 1. Under the influence of the air flow, the elastic thread 6 stretches and the sphere 5 moves along the axis of the cone 1 to the outlet 2, forming an annular gap with the wall of the cone 1 for the passage of air. With increasing air flow (dynamic pressure), the size of the annular gap formed by the sphere 5 and the wall of the cone 1 also increases, which leads to an increase in the cross section and helps to stabilize the speed of the supply jet. In the absence of air flow, due to the elastic force of the thread 6, the sphere 5 moves to the inlet 4 to its original position, while the sphere 5 overlaps the passage section of the cone 1 by the type of check valve, expanding the functional technological capabilities of the device. The high intensity of the attenuation of the velocity of the supply jet is due to the fact that part of the energy of the air flow passes into the energy of elastic deformation of the thread 6. A reduction in air leakage through the gap between the sphere 5 and the wall of the cone 1 can be achieved by coating the walls of the cone 1 from the side of the air flow with a layer of elastic material 7 at providing an elastically deformable contact of the material layer 7 with the sphere 5 with providing a seal of the gap. In the event that the elastic material 7 consists of rubber with a porous structure and the reactive ingredients of the flame retardant composition, for example, ograks - l, fire - trm, with the possibility of thermal expansion with increasing temperature with the formation of foam coke for fire protection and overlapping the passage section of the cone 1 and branch pipe 3, fire safety and fire resistance of the supply air duct network are increased due to the fact that due to a fire in the room or the serviced object, the air temperature rises causing the device to heat up properties and expansion of thermal expansion material, filling inside the cone 1 and pipe 3, blocking the passage section of the inlet 4, and pipe 3 for supplying air, and, accordingly, eliminating the possibility of air and harmful substances released during combustion through the device. As a result, the flow of flame and harmful substances into the supply air duct network is blocked and their distribution in this network is prevented. The flame that can spread through the supply air duct network also does not have the ability to penetrate the room through the device due to the formation of foam coke and overlapping the bore of the nozzle 3 and the cone 1. The cone 1 and the nozzle also contribute to the fire safety and fire resistance of the supply duct network 3 are made of metal with high thermal conductivity or the cone 1 is oriented vertically, and the sphere 5 is located above the pipe 3.

Claims (5)

1. An air distribution device comprising a housing with an outlet window and a pipe for supplying air, and a flow resistance located in the housing, including a stretched element, and the possibility of perpendicular placement, characterized in that the housing is made in the form of a diffuser, in the form of a hollow truncated cone, in a larger at the base of which there is an end outlet, and at a smaller base - an end inlet communicated with the nozzle, the flow resistance being located in the cone cavity and made in a sphere fixed on a perpendicular axis of the cone, an elastic double-end thread, the ends of which are fixed on the cone wall opposite each other with elastic stretching of the thread, while the thread and the axis of the cone intersect the geometric center of the sphere, which is oriented with overlapping the passage section of the cone. 2. The device according to p. 1, characterized in that the wall of the cone inside is covered with a layer of elastic material with the possibility of elastically deformable contact with the sphere. 3. The device according to p. 2, characterized in that the layer of elastic material consists of rubber with a porous structure and the reactive ingredients of the fire retardant composition, for example, ograks - l, fire - trm, with the possibility of thermal expansion with increasing temperature with the formation of foam coke for fire protection and overlapping the bore of the cone and pipe. 4. The device according to p. 3, characterized in that the cone and pipe are made of metal with high thermal conductivity. 5. The device according to paragraphs. 3, 4, characterized in that the cone is oriented vertically, while the sphere is located above the nozzle.

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