RU2307987C1 - Air distributor - Google Patents

Abstract

FIELD: air conditioning or ventilation.

SUBSTANCE: air distributor comprises stages arranged in cascade over its height and made of overturned truncated pyramids and base shaped into a flat square interconnected by means of guides. The top edges of the stages are made of flat wires. The edges of the base are provided with vertical sides. The angle of inclination of the sides of the overturned truncated pyramids of the stages is determined by the size of the side of the square of the outlet opening of the terminal stage and the width of the slot opening.

EFFECT: improved design.

2 dwg

Description

The invention relates to the field of ventilation and can be used for the distribution of supply air in residential premises.

Known air distributor containing a housing with an inlet and outlet windows made in the base, overlapping the outlet window - screen. The screen and the base are made in the form of plates with corrugations equally oriented with the formation of groups of channels for the passage of air (Russian patent No. 2196277, CL F24F 13/06, 2003).

The disadvantages of the known air distributor are the unidirectional air passage and low productivity in terms of the volume of exhaust air.

An air diffuser is selected as a prototype, comprising a casing with steps cascading along its height, having bases and air outlets, the outlet openings being made in the vertical plane of the step (Russian patent No. 2079061, class F24F 13/06, 1997).

The disadvantage of this air distributor is that the device is designed for the frontal direction of the air flow and when it is installed in the outer wall, a lateral wind freely passes through its outlet openings in the vertical plane of the step, forming a draft. In addition, due to the limited area of the outlet openings, the device has low productivity in terms of the volume of air flow and does not provide quick and complete extinguishing of air jets.

The objective of the invention is the formation of a stable flow of supply air, due only to the speed of the removed air through the exhaust ducts of the room, and its uniform distribution.

EFFECT: increased attenuation intensity of supply air jets of any direction.

The specified technical result is achieved in that the air diffuser consists of steps cascaded along its height. The steps are made in the form of inverted truncated pyramids, partially going one after another with the formation of a slit hole along the perimeter. A flat base in the shape of a square is provided in the air distributor. The steps of the air distributor and the base are fastened with guides.

Unlike the prototype, the upper edges of the steps are made in the form of flat shelves. The edges of the flat shelves, except the first, and the edges of the flat base are provided with sides curved vertically in height to the lower edge of the previous step. The angle of inclination of the faces of the inverted truncated pyramids of the steps is chosen so that the side of the square of the outlet of the last step is approximately two times the width of the slot hole.

Figure 1 shows a front view and a section, figure 2 is a top view. The device contains steps 1, cascading along its height, made in the form of inverted truncated pyramids, partially extending one after another with the formation of a slit hole 2 around the perimeter, and a flat base 3 having the shape of a square. Steps 1 and the base 3 are fastened by guides 4. The upper edges of the steps 1 are made in the form of flat shelves 5. The edges of the flat shelves 5 of the steps 1, except the first, and the edges of the flat base 3 are provided with sides 6 curved vertically in height to the bottom edge 7 of the previous step 1 The angle α of inclination of the faces of the inverted truncated pyramids of steps 1 is chosen such that the side a of the square of the outlet of the last step 1 is approximately two times greater than the width b of the slot 2.

The device operates as follows.

The supply air flow is directed into the air distributor through the central hole, while part of the kinematic energy of the jet is spent to overcome the resistance of the inclined walls of steps 1, the jet velocity decreases. Next, the jet of fresh air under the action of dynamic pressure is distributed over the slotted holes 2.

The implementation of the upper edges of the steps 1 in the form of flat shelves 5 contributes to the rotation of the air flow, the speed of which decreases even more. Parts of the air flow flowing along the flat shelves of 5 steps 1 in the slotted holes 2, collide with the sides 6 of the edges of the flat shelves 5, once again change their original direction, become turbulized and lose speed.

The jets flowing from the upper (along the air flow) slotted openings 2 of the air distributor run onto the jets flowing from below the slotted openings 2, providing a quick attenuation of the supply jet, thereby increasing the mixing rate of the supply air with the room air, which ultimately leads to improved microclimate in the latter.

The air distributor is an element of a unified system of natural supply and exhaust ventilation with heated supply air, is simple to manufacture and economical.

Claims (1)

An air distributor consisting of steps cascading along its height, made in the form of inverted truncated pyramids, partially extending one after another with the formation of a slotted hole along the perimeter, and a flat base having the shape of a square fastened by guides, characterized in that the upper edges of the steps are made in the form of flat shelves, the edges of which, except the first, and the edges of the flat base are provided with sides curved vertically in height to the lower edge of the previous step, and the angle of inclination of the faces is upside down The truncated truncated pyramids of the steps are chosen such that the side of the square of the outlet of the last step is approximately two times larger than the width of the slot hole.

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