FI65667C - ANORDNING FOER TILLFOERING AV LUFT TILL ETT VISTELSEUTRYMME - Google Patents

Description

65667

Device for directing air into the living area

Anordning förföring av luft account ett vist e 1seutrymme

The invention relates to a device as defined in the preamble of the claim for conducting air to a living space.

The known devices, which are used in particular for keeping the air in the working spaces clean, comprise an air supply duct in which the flow rate of the supply air is relatively high compared with the flow rate of the air blown into the ventilated space. However, the known devices have the serious drawback that although the effective cross-sectional area of the supply element is dimensioned considerably larger than the cross-section of the air supply duct, it is not possible to arrange the air supply to the room through the supply element. In particular, this disadvantage has arisen in connection with the previous device solutions of the present invention, in which the air supply is arranged to take place almost perpendicularly downwards inside the cylindrical fan surface, from which air is further directed at the most uniform flow rate from the jacket to the living space.

The object of the present invention is to provide a device with which the above-mentioned drawback is eliminated. In extensive practical experiments, it has been found that by implementing the device according to the invention in the manner shown in the characteristic of the claim, a large amount of air can be distributed to the living space without drawing. That is, the air flow velocity in the immediate vicinity of the living space in the immediate vicinity of the living space is about 0.2 m / sec in the area of the living space in the immediate vicinity of the living space of the invention, which is arranged in a vertical position in the floor plane. In this case, a major drawback of the current equipment solutions for the living room user has been solved, i.e. the unpleasant feeling of traction caused by the uneven flow rate of the air entering the living space through the blowing device has been eliminated. A further advantage of the value of the invention is that the device implemented according to the feature of the claim operates with a very small pressure drop, which is in practice of the order of 50-80 Pascals, while it is 150-200 Pascals in the devices generally on the market. In other words, the invention makes it possible to convert the high dynamic pressure in the supply duct with a small pressure drop over the entire surface of the supply element into a uniform static pressure and at the same time change the supply air flow direction by 90 °, because in most practical applications an almost horizontal direction is required for the air flow from the blower member. In addition, tests have shown that the noise level of the device is very low, so there are no noise nuisances in the working and living areas. The need for maintenance of the device is almost non-existent, as it does not use replaceable filters, which also significantly improves the fire safety of the device.

In the following, the invention will be further illustrated by means of two exemplary embodiments, the details of which the invention achieves in more detail. The description refers to two schematic drawings illustrating said embodiments.

Fig. 1 shows an apparatus in which the first airflow retarding and directing member is plate-like, and Fig. 2 shows an apparatus in which the first airflow retarding and directing member is tubular.

3,65667

In the figures, the counterparts shown in both embodiments are denoted by the same reference numerals, i.e. the feed channel is generally indicated by reference numeral 1, and Between the supply duct 1 and the blowing element 2 there is a conical expansion part 3 known per se. · Most usually, the device according to the invention is placed on the floor level L1 of the living space.

According to Fig. 1, a hole strip 5 (point A) perpendicular to the direction of air flow (point A), i.e. the so-called a lattice in which the first deceleration and pressure drop of the air flow (arrows 6) from the supply duct 1 to the expansion part 3 takes place. The upper edge 7 of the double jacket part 2 is closed, so the air flow in the vicinity of the edges of the expansion part is directed towards the center of the jacket part according to the arrows 8 and thus the vertical flow component in the vicinity of the inner jacket part 2 'is substantially reduced. After the first deceleration zone, the flow enters the double jacket section, from where it is distributed according to arrows 9 through the inner jacket 2 'inner jacket to a jacket ring-shaped space 10 where final flow and pressure equalization occurs before the flow is evenly distributed. "Technically, the first deceleration zone (perforated plate 5) thus has the function of slowing and equalizing the flow into the inner part of the jacket part. The double jacket cylindrical ring 10 equalizes the pressure and permanently removes the vertical component before the flow , wherein the closed, downwardly sloping upper edge 7 connecting the jacket parts 2 'and 2 "directs the air flow flowing at the edge of the guide part 3 towards the interior of the jacket 2 and thus substantially reduces 65667 u vertical component in the vicinity of the jacket interior 2', I created a flow (arrows 9) in the jacket ring 10 of the jacket is already almost horizontal.

Structurally, the device according to Fig. 1 can be made more advantageous in some operating situations by forming a perforated plate 5 as an upwardly directed conical surface, the flow at said conical deceleration zone being more directed towards the central axis of the jacket surface. In some cases, it may be advantageous to form either of the jacket surfaces 2 ', 2 "or both conical, with the cross-sectional area of the annular space 10 changing in the height direction of the device.

The number of perforations (as a percentage of the total surface) and the interrelationships of the different deceleration zones 2 ', 2 "and 5 have been found to be of great importance for the operation of the device. Expressed as percentage of holes, R1, L2 and R3 are significantly larger than R1. or R2, wherein R1 represents the percentage of holes in the inner shell surface 2 ', R2 represents the percentage of holes in the outer shell surface 2' and R3 represents the percentage of holes in the perforated plate 5, i.e. the lattice.

In the embodiment shown in Fig. 2, the structure of the double jacket part 2 is basically similar to the previous embodiment, but the first deceleration zone is formed by a pipe 12 which is an extension of the supply duct 1 extending to the bottom of the device. The pipes 12 are perforated, whereby the air coming from the inlet duct 1 enters, according to the arrows 13, into the space inside the double jacket and further into the annular space 10 of the double jacket and further into the room as a constant flow as described in the previous embodiment. At the bottom of the tube 12 there is an annular flow barrier IA. This prevents excessive airflow in the lower part of the pipe due to the pressure increase caused by the flow in the lower part of the jacket surface, which in the absence of such an obstruction may result in a strong airflow at the floor level of the ventilated space and thus a draft. However, a relatively narrow, horizontal gap 15 is formed in the flow barrier 14, the size of which is chosen so that a uniform air flow is also formed at the lower edge of the jacket surface 2 (arrows 16).

The tubes 12 thus function in the same way as the perforated plate 5 described in the previous embodiment as the first flow retarding and directing member.

Also in this embodiment, the jacket surfaces 2 ', 2 "or one of them can be formed partially conical as in the previous embodiment.

The diameter of the pipe 12 preferably corresponds to the diameter of the supply channel 1. In this embodiment, it has been found in practical experiments that the hole percentage R4 of the inner tube 12 is equal to the hole percentage R5 of the outer jacket surface 2 "and the hole percentage R6 of the inner jacket 2 'is higher than the previous ones.

The invention is applicable in connection with supply ducts and blow-in walls of different cross-sections, so that one or more planar surfaces, e.g. the side surfaces of a box-like structure, etc. whereby the need for maintenance of the device is very low.

Claims (2)

6 65667 Patents of intent: A device for supplying air to a living space, the device comprising an supply duct (1) for supplying air at a relatively high speed to a vertically arranged supply element (2) having a cross-sectional area substantially larger than the supply duct cross-section, an extension connecting the supply channel (1) and the supply element (2) the blowing member (2) being preferably a perforated metal plate through which holes air enters the living space, the device comprising at least three perforated members (2, 2 ", 5 or 12), one (5 or 12) of which is fitted to the blowing member ( 2) inside to form a first airflow deceleration and directing member, two of which are arranged as a double jacket (2 ', 2 ") with a space (10) between them to equalize the airflow before it enters the living space through the perforation of the outer jacket part (2"); the expansion part (3) being connected to the outer jacket part (2 "), characterized in that the jacket parts (2 ', 2") are connected to the expansion part on the side of the san (3) plate (7) to direct the air flow away from the plane of the inner jacket (2 ') (arrow 8) and thus to reduce the velocity component parallel to the plane of the air flow inner jacket (2').