FI71418B - air supply device - Google Patents

Description

1 71418

Supply Unit

The invention relates to a supply air device, in particular one which is intended to supply low-temperature air at a low speed to an apartment, the purpose being to maintain temperature deposition in the air volume of the apartment. The supply air device is still intended to be placed on or near the floor. It has a shell which forms a column which preferably has a substantially circular or semicircular cross-sectional shape in a horizontal section. It extends in height mainly through the living area of the apartment. Its interior is connected to a duct that supplies the required supply air flow, and its shell is perforated on a substantial part of its circumferential surface so that air can enter the apartment. Furthermore, an air-permeable mat is arranged along the sheath surface of the shell.

Such a supply air unit is very well suited for apartments with a high dust and heat load, but it does not always meet the requirements set for low noise and even air distribution.

The object of the invention is to provide a supply air device of the type mentioned at the beginning which meets the very high requirements for silence and good air distribution.

The desired result is obtained by giving the supply air device the features which appear from the following claim 1.

An embodiment of the invention will be explained in more detail below with reference to the accompanying drawings.

Figure 1 is a top view of the supply air device.

Figure 2 is a vertical section along the line II-II in Figure 1.

Figure 3 is a partial section on a larger scale according to Figure III in Figure 1.

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The supply air device shown is columnar and has a substantially semi-cylindrical shape, placing it flat against an intact backing wall. The device is intended to be normally placed on the floor and is usually about 2.5 meters high and thus extends in height through the living area of the apartment. It has an inlet 1 at its upwardly turned end for connection to a supply air duct (not shown).

The jacket part of the housing 5 of the device has a semi-cylindrical front part 6 and two flat side parts 7, of which the former 6 is perforated so that the supply air flow from the inlet opening 1 can flow through, while both side parts 7 are intact. Advantages The boundary edges of the side parts are bent outwards and connected as a vertical flange seam 8 on each side of the device. The shell also has a lower end (Figure 2) which forms the bottom of the device and is intact.

Generally, a considerably low temperature supply air flow is fed to the device and the inlet 1 and led to the apartment at a low speed through the perforated shell part 6, so as to obtain a living zone with clean and temperature-controlled air. The air flow is then supplied via an air-permeable distribution mat 4 arranged along the torn part of the casing of the shell 5.

The dispensing mat 4 is made of flexible open-cell foam and is located immediately inside the perforated shell part 6, which consists of a torn plate with a degree of tearing providing at least 65% free surface area in its torn part.

Inside the mat 4, two torn throttle plates 2 and 3 are arranged at a depth distance from each other and from the mat 4. The second throttle plate 2 is located inside the second 3, and the plates are connected to the shell 5 so that the entire air flow must first through the plate 2 through.

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The non-dispensable material 4 is suitably a fire-resistant impregnated open-cell polyurethane foam with a pore size of approximately 30 ppi.

The inner choke plate 2 is preferably perforated substantially entirely, the degree of perforation providing 8-12, preferably 10% free surface area.

The throttling plate 3 is also suitably perforated substantially entirely, the degree of perforation providing 3-7, preferably 5% free surface area.

The torn part 6 of the housing 5 of the device has a perforation with a degree of perforation providing 65-75% of the free surface area.

The perforation is preferably formed in both throttle plates 2 and 3 by round holes with a diameter of 3-7 mm, preferably 5 mm.

The shell, on the other hand, suitably has a square perforation, preferably with square holes, in which the side of the hole is about 10 mm.

The distance between the distribution mat 4 and the throttling plate 3 must be at least 5 mm.

Both throttle plates 2 and 3 must not be 60 mm closer to each other.

Claims (4)

71418 A supply air device specifically designed to supply low-temperature air at low speed to an apartment to maintain temperature deposition in the air volume of the apartment, intended to be placed on or near the floor and consisting of a column preferably having a substantially circular or semicircular diagonal shape mainly through the living area of the apartment, the inner part of the device being connected to a duct to receive the air flow required for said supply, the device housing (5) being perforated on a substantially circumferential surface for supplying air to the apartment, the air permeable mat (4) characterized in that the mat (4) consists of a flexible open-cell foam and is located immediately inside a perforated plate (6) in the housing of the device, the degree of perforation of which provides at least 65% of the free surface area in its torn and that at a distance from the mat (4) there are two deeply spaced apart torn throttle plates (2, 3), the distance between the mat (4) and the outer throttle plate (3) being at least 5 mm and both throttle plates (2, 3) is at least 60 mm. Supply air device according to Claim 1, characterized in that the plastic of the mat (4) is a fire-resistant, open-cell polyurethane foam with a pore size of approximately 30 ppi. Supply air device according to Claim 1 or 2, characterized in that the inner throttling plate (2) is substantially perforated and has a degree of perforation providing 8-12%, preferably 10% of the free surface area, and the outer throttling plate (3) ) is also substantially completely perforated and provides a degree of perforation of 3-7%, preferably 5% of free surface area, while the degree of perforation of the torn shell plate (6) of the device provides 65-75% of free surface area. 7141 8 Supply air device according to Claim 3, characterized in that the perforation of the two throttle plates (2, 3) consists of holes with a diameter of 3 to 7 mm, preferably 5 mm, while the shell plate (6) has a square perforation. , preferably having square holes with the side of the hole being about 10 mm.