FI94670B - The air distribution unit - Google Patents

Abstract

An air distribution device (10) comprises an air inlet (12) which conducts incoming ventilation air (56), through a perforated distributing and throttling plate (32), to a distribution chamber (14) which is bounded on one side by a perforated front cover plate (24) of the device. Located inwardly of the front cover plate are guide rails (26) which are perpendicular to the incoming air flow and steer the exiting air in a first main direction. The device further comprises plates (30) which extend at right angles to the rails (26) and which function to support the guide rails and to guide the air exiting from the device in another main direction. The distributing end throttling plate (32) exhibits through-flow zones (34, 35, 36) with intermediate imperforate or constricted induction zones (38) on the downstream side of the plate, these zones being open towards a secondary air port (42) provided on the device.

Description

94670

The present invention relates to an air distribution device as set out in the preamble of claim 1.

The air distribution device according to the invention is a low-impulse device and can either be built into or attached to a wall or a similar structure, or it can be freely on the floor or a corresponding support surface.

The device is located close to the floor and accordingly the speed of the incoming air must be low in order to avoid draft or other disturbing phenomena.

15 Previously known devices of this type have a number of drawbacks. The structure of the device is often unnecessarily complex, resulting in high manufacturing costs and time, as well as high repair and maintenance costs. In addition, the outgoing air flow 20 is often not satisfactorily controlled, especially horizontally, resulting in uneven ventilation in the room in which the device is located. Very often the previously known air distribution devices have the difficulty of a high inlet air pressure in connection with small openings in the distribution and / or partition surfaces of the device. Such small openings become clogged. sooner or later with impurities, causing less airflow and thus undesirable behavior in the device. It is often necessary to clean and / or replace parts of the device regularly, as in EP-A-0199762.

FR-A-2,169,131 discloses a device without secondary air or room air intake, but with at least three different torn walls through which small holes the air must be supplied at high pressure and thus has the above-mentioned drawbacks.

2 94670

US-A-1,523,268 discloses an air distribution system for ceilings, which also has no secondary or room air intake, and in which the different outlets are not limited to a single and uniform device. This system is also not designed for use in the lower part of a room like the present invention.

Accordingly, it is an object of the invention to provide an improved air distribution device in which the above-mentioned drawbacks are substantially avoided, which is simple in construction, satisfactorily adjusts the incoming air in both vertical and horizontal directions, has low manufacturing costs and repair and maintenance costs. progress in this area. It is also an object of the invention to save energy and costs by enabling, firstly, less primary air to be used, i.e. ventilation air and, secondly, its lower temperature compared to known devices. It is also an object of the invention to provide a better spread of ventilation air and to avoid the need to inspect, clean and / or replace parts of the device regularly.

These objects are achieved by an air distribution device as mentioned above, which has the features set out in the following claims, mainly in the characterizing part of claim 1.

The device according to the invention requires a relatively low velocity of the air flowing through and ensures uniform ventilation of the considerable area surrounding the device. The secondary air is continuously sucked into the device, mixed with the primary air there and fed out in a mixed and proportioned manner. In a practical example, the secondary air has a higher temperature than

II

3,94670 with primary air, which accordingly causes mixing of temperatures and thus allows a lower temperature of the primary air without the distributed air mixture having a lower temperature compared to a device without suction and other essential features of the present invention. In this way, the cost of air distribution and the equipment performing this can be kept low because smaller proportions and lower temperatures can be used. You also used) operating costs can be reduced because you can handle smaller fans or their lower power.

The device operates completely without hydraulic, pneumatic 15 or electrical members, which are often susceptible to breakage and have a limited service life. Equipping a device with a distribution and throttling plate having flow zones and intact intact or reduced intake zones on the downstream side of the plate, which allow secondary or room air intake, is a surprisingly simple and effective way to achieve an advantageous suction on the one hand and To the combined approach.

25

The invention will now be described in more detail with reference to exemplary embodiments thereof, illustrated in the accompanying drawings, in which Figure 1 is a partially sectioned perspective view of a first embodiment of the invention, Figure 2 is a cross-sectional view taken along line B of Figure 1 and Figure 3 shows a device mounted on a wall structure. * without a distribution and throttling plate, * 4 94670 Fig. 4 is a horizontal view of the air distribution device j taken along line C of Fig. 1, Fig. 5 is a partially sectioned perspective view of a second embodiment of the invention, Fig. 6 is an axial section Fig. 5 is a horizontal section taken along line E of Fig. 6 and shows guide rails and flow control and support plates 15 belonging to the device according to the invention; Fig. 8 shows the air distribution device at point D in Fig. 6. and a second embodiment of the transport plate, Fig. 9 is a partially sectioned perspective view of a third embodiment of the invention; Fig. 10 is a partially sectioned side view of Fig. 11; along line FF, Fig. 11 is a partially sectioned top view of the device of Figs. 9 and 10, Fig. 12 is a partially sectioned perspective view, of a fourth embodiment of the invention, Fig. 13 is a top view of the device of Fig. 12 without a top wall, Fig. 14 shows is an exploded view of the arrangement of the guide rails and support plates of Figures 12 and 13, Fig. 15 is a partially sectioned perspective view of a fifth embodiment of the invention, Fig. 16 is a partially sectioned front view of the device of Fig. 15, and Fig. 17 is a view taken along line KK in Fig. 16.

Figures 1-4 show a first embodiment of an air distribution device 15 according to the invention. The device is intended to be mounted on or near a wall or similar structure, e.g. on a post wall described by dotted lines in Figure 2, a short distance above the floor surface 2. The device 10 is flat and includes 20 inlet shells 12 extending into a dispensing chamber 14 bounded by a rear wall 16, side walls 18 and a bottom wall 20, and an upper wall 22 adjacent the inlet sheath. The distribution chamber 14 is covered by a front cover plate 24 perforated on the side of the room to be ventilated, with a distribution or screen plate 25 located centrally and inwards, thereby influencing the desired lateral disintegration of a part of the outgoing air flow. Arranged inwards from the plates 24 and 25 are horizontal guide rails 26, the rear edges of which 30 bend upwards at 28. The rails 26 are supported by side walls 18 or preferably, as shown, vertical flow guide and support plates 30, which are preferably inclined vertically so as to extend away. in the direction of the outgoing air flow 35, and which are located on their own sides of the distribution plate 25 and have an outwardly angled portion 31 at the point closest to the front plate 24. The flow guide and support plates 30 and 6 94670 are preferably also provided with slots for the guide rails 26, by means of which the plates and the rails can be locked to each other. The plates 30 and / or the rails 26 can be arranged to be tilted for a variable setting 5.

Between the inlet sheath 12 and the dispensing chamber or housing 14 is an air distribution and throttling plate 32 through which holes 34 are pierced. The holes are arranged in rear rows 10 35 and mutually parallel rows 36, surrounding rows of intact intake zones 38 facing the front of the device. . As indicated by arrow 40 in Figures 2 and 3, the intake air is drawn by suction to the downstream 15 intake zones of the distribution plate 32 from a secondary air opening or connection 42 directed towards the front of the device. The secondary air vent is bounded laterally by the side walls 18, the top top wall 22 and / or the upper baffle plate 44, and the bottom lower baffle plate 20 46. However, this secondary air unit may be covered, e.g., by a movable plane or curved parallel perforated plate, screen, or the like ( not shown) when a smaller amount of secondary air, i.e. return air, is taken from a ventilated 25 room. This latter plate and plate 25 can be combined so that both areas can be adjusted simultaneously in any desired manner.

The front plate 24 is spaced apart from the wall 130 so as to leave a gap or gap 48 in between. The plate 24 has a rearwardly bent side edge portion 50 at each end with an inwardly turned flange or lip 52. In both bent side edge portions 50 and their front plate and also 35 the corners associated with the lips 52 have perforations 54 similar to those on the front panel. This avoids unevenly oriented and sharply limited air outlet zones both on the front side of the device 7 94670 and outside the gap or gap 48. Holes 54 in the side-edge portions 50 and at their corners help to equalize the flow of gas or air in this area and also prevent the occurrence of stagnation zones.

5 The centrally located air distribution plate 25 effectively restricts the air flow in the central area of the front plate.

This air-restricting effect, together with the control effect of the flow control and support plates 30 with their parts 31 at an outward angle, helps to supply air 10 to the areas immediately in front of and on the sides of the air distribution device according to the invention.

The operation of the air distribution device 10 can be briefly described as follows: Air entering the device from a pipe (not shown) slows in the inlet housing 12 due to the air distribution and throttling plate 32 and flows evenly distributed down through the rear row of holes 35 along the rear wall 16, 20 and through 36 rows of holes.

As a result, a vacuum is created below the plate 32 in the intact zones 38 and the intake air is drawn into these zones as described above.

As the air passes down through the distribution chamber 14, the partial air-25 flows are each in turn directed forward; the effect of the rails 26. The upwardly bent portions 28 of the rails 26 then act as "dividers" and divide off the incoming air flow closest to the front of the device. The rear wall 16 is inclined 30 and as a result the chamber 14 narrows downwards so that air flows at substantially the same speed ... along the entire length of the chamber and the guide rails turn or direct equal airflow out through the front cover plate.

A wall-mounted air distribution device constructed in accordance with the invention is typically arranged to be fitted to a post frame in which the vertical posts 35 8 94670 are located 70 nun apart. For this purpose, the inlet sheath suitably has a size of 60 x approx. 500 in order to make use of all the space available between the posts. The width of the device itself is typically 600 mm and its height is 300-900 mm depending on the case-specific air requirements. The diameter of the holes in the distribution plate 32 is between 8-16 mm depending on the case-specific air requirements. The front cover plate may suitably have a hole diameter of 5 mm with distances between the centers 10 of 7.5 mm. The device 10 is suitably placed at a distance of 10 cm from the floor.

Figures 5-8 show another embodiment of the device according to the invention, denoted by reference numeral 15 110. The device is intended to be placed freely on a floor or a corresponding support surface. Parts which are identical or identical to the corresponding parts of the embodiment of Figures 1-4 are denoted by the same reference numerals, except that 1 (one) is added in front of them.

The example device 110 illustrated in Figures 5-8 has an inlet sheath 112 extending into a dispensing chamber 114 bounded on the bottom by a base plate 120 and a top cover 122 on the top 25.

The device is supported by the floor base 123 and has a circumferential cylindrical vertical front cover pierced in the hole 154 to allow ventilation air to pass through. Inside the front cover there are a plurality of annular, horizontally directed guide rails 126, each with a radially inner edge bent upwardly around the center hole 129 of the ring to form a vertical collar 128. The annular rails 126 35 are supported by at least three, preferably four or more vertical flow guide and support plates 130.

II

9 94670 more. The size of the central hole of the annular guide rails 129 decreases deeper and farther from the inlet sheath 112 to form a downwardly tapering dispensing chamber. Also in this case, the guide rails 126 and / or the vertical support plates 130 have slots by means of which the rails can be securely fastened and held in place reliably.

The purpose of the plates 130 is to support the annular guide rails 126 and also to guide the outgoing ventilation air 10 horizontally. Accordingly, when the need for such control is great, a large number of flow control and support plates 130 are provided. This may be the case, for example, when the air distribution device 10 is intended to provide ventilation on only 15 parts of its perimeter and the other perimeter is covered by a shut-off plate in the immediate vicinity of the front cover plate 124. In this case, the plates 130 are preferably located along the edges of such a barrier plate.

20

As shown in Figure 5, the horizontal portions of the rails 126 and preferably also the collars 128 therein can be pierced with holes having e.g. a diameter of 2 mm. These holes allow a certain amount of air 25 to pass through the surfaces of the guide rails and through the collars of the guide rails. This prevents the formation of vacuum zones below the guide rails and / or outside the collars, where backflow and turbulence may occur in the zones, resulting in acoustic disturbances and flow disturbances in the flow out of the air distributor.

1 ·

The inlet sheath 112 engages an inlet housing or chamber 131, the bottom of which abuts the dispensing and throttling plate 132. The plate 132 has through holes 134 arranged in radially spaced rows with intake zones 138 extending outwardly toward the periphery of the device. Around the device 10 94670 110 below the plate 132 is a circumferentially secondary air connection 142 / bounded at the top by the top plate 144 (which also acts as the outer wall of the inlet housing 131) and from the bottom to the bottom plate 5 146. As in the first embodiment described below, flows 140 is conducted through secondary air connections 142. This suction of the secondary air into the ventilation device can also be effected by an ejector effect due to the velocity 10 at which the primary air flows into the device.

By sucking secondary air into the device as described above, it is possible to increase the amount of air leaving the device and thus also an area or zone that can be effectively ventilated while keeping the total amount of fresh air required from the external fresh air source to a minimum. As a result, the energy costs of transporting the air 20 and heating the fresh air delivered to the device are reduced, thereby minimizing the total cost of ventilation.

A free-standing air distribution device constructed in accordance with the invention need not be cylindrical, but may have any desired shape. For example, the device may be triangular, square, rectangular, or any other polygon, or it may be irregularly shaped.

30

In the "corner model" of Figures 9-11, the embodiment of Figures 1-4. components similar or identical to the corresponding components are denoted by the same reference numerals, except that 2 is added in front. In an analogous manner, the fourth and fifth embodiments have corresponding reference numerals to which the numbers 3 and 4 have been added in front.

II

11 94670

In Figures 9-11, there is an oblique rear wall 216 between the side walls, preferably at right angles to each other, which preferably terminates in an upper oblique surface approximately the same height as the lower baffle plate 246. In this case, the guide rails 226 preferably have straight front edges, although the front cover plate 224 is preferably curved. The central portions of the guide rails form a second straight edge which abut against and support the distribution plates 10 225. Instead of flow control or support plates, there are preferably only side stops which are formed by the side walls of this device. In this case, no substantial lateral dispersion in the outgoing mixed air flow is generally necessary, since the side walls of this device are already at the Selma level with the adjacent walls of the room.

The embodiment shown in Figures 12-14 coincides in principle with the embodiment according to Figures 5-8. In this case, however, the vertical flow control and support plates 330 are preferably arranged to support the entire central structure. At each level, the two support plates 330 are preferably connected together by a guide rail 326, as shown in Figure 14, wherein the plates 30 are provided with mating slots in the center and each guide rail forms upwardly bent edges 308 around the central rectangular opening with free recesses in the support. - to hold the discs. As shown in Fig. 13, the size of the central opening of the guide rails decreases from top to bottom.

35 Finally, the fifth embodiment shown in Figs. 15 to 17 shows a device having a cross-section in the shape of an elongate semicircle 12,94670. The interior of this device consists of a substantially mirror-symmetrical combination of the two devices of Figures 9-11.

In the embodiments of Figures 9-11 and 15-17, the center portions and side edges of the front edges of the guide rails are preferably bent up or down to form flanges for attachment to an adjacent wall and to the distribution plates of the device, respectively.

Furthermore, in all embodiments with distribution plates, these plates can advantageously be connected to the guide rails so that these parts can form a unit, preferably in combination with possible flow control plates or the like, whereby this unit can be removed and installed quickly and easily. In addition, as can be seen in particular in Figures 11 and 17, the straight front edges of the guide rails in combination with the curved front plate facilitate the equalization of the pressure of the outflowing air mixture, whereby the air mixture is distributed as evenly as possible in the room. In embodiments with an oblique rear wall, it can, of course, be replaced by baffles whose size decreases as they go downwards, as is the case with fully round embodiments.

25

The invention is not limited to the described and schematically described embodiments, and the various features and combinations described and described therein may be combined in any desired manner within the scope of the invention as defined in the following claims. For example, the flow-free areas can be replaced by flow branches between the holes 36, 136, which can also have any desired shape. In addition, the plates 32, 35 132 can be replaced with other parts as desired.

The guide rails can also be made in one piece with the support structure, i.e. with lateral stops li 13 94670, which may be support plates or flow guide plates, namely by stamping said guide rails out of a metal plate. The support structure may be left to be located in a plane or arc parallel to the front cover or it may be bent to be located at any desired angle thereto. Of course, such a unit can be made of a plastic material, preferably by injection molding.

10

It should be emphasized that the guide rails shown in Figures 5 and 12 have a constant overall diameter, but the diameters or dimensions of the central openings decrease from top to bottom, although this may be difficult to see. Figures 6 and 13 clearly illustrate this purpose. Only by arranging some central structure that acts like a rear wall 16, etc., can the central openings be the same size throughout the device.

Claims (10)

14 94670 An air distribution device (10) comprising an air inlet (12) leading to primary or ventilation air (56), a distribution chamber (14), and a perforated distribution plate (25; 32) and a front cover plate (24). directed towards the environment and an air connection (42) for the intake of secondary or room air intended to be supplied with said primary air 10 through said cover plate, characterized in that said distribution plate or one distribution plate (32) is arranged at said inlet and on the other side and said distribution chamber and said secondary air to one from the other 15 side between said distribution chamber, this plate is further formed kuris-plate for a through-flow (34) and between the intact or shrunk sisäänimuvyöhyk-zones (38) of the plate downstream, which zones open towards said secondary air connection 20 to provide a vacuum below said plate and for a second that the air distribution device further comprises guide rails (26), the main surfaces of which are located at substantially right angles to the flow direction of the incoming air and which direct the mixed air leaving the distribution chamber in the first main direction into the room, said guide rails being said distribution chamber and that said guide rails are supported by one or more lateral stops, preferably 30 plates (30) acting as flow control plates,. , which are limited to a substantially right angle to said guide rails and are further arranged to guide and / or limit lateral parts of the air flow leaving the device. 35 Device according to Claim 1, characterized in that the distribution chamber (14; 114; 214; 314; 414) decreases in cross-sectional area as the distance increases from the air inlet (12; 112; 212; 312; 412). li 15 94670 Device according to Claim 1, characterized in that in the guide rails (26; 126; 226; 326; 426) the edge facing the distribution chamber (14; 114; 214; 314; 414) is formed in the part (28; 128; 228; 328; 428), 5 at an angle to the incoming airflows (56; 156; 256; 356; 456). Device according to Claim 1, characterized in that the guide rails (26; 126; 226; 326; 426) 10 and / or the angled rail sections are provided with perforations so that a certain, limited amount of air can pass through the rails and correspondingly to the protection side of the angled rail parts. Device according to claim 1, characterized in that said flow-through zones are in the form of parallel rows of holes (36) or radially or outwardly extending rows of holes or the like (136; 236; 336; 436), the rows 20 preferably starting from the rear or central, substantially from a continuous row of holes (35). Device according to Claim 1, characterized in that the cover plate (24) has a distribution or screen plate 25 (25; 225; 425) which is located inwards and is located on the guide rails and / or the secondary air connection (42; 242; 442). ). « Device according to claim 1, characterized in that the flow control and support plates (30) extend outwards towards said environment, preferably in an adjustable manner, to direct the air leaving the device in the second main direction, and that the outer edges (31) of said plates are preferably at an angle in opposite directions, and / or that said plates (30) are formed integrally with said guide rails, preferably by stamping the latter out of a metal plate, said plates (30) being located in a plane 16 94670 parallel or arcuate with said front cover plate (24) or they are bent to comprise any desired angle with respect to said front cover plate. 5 Device according to claim 1, characterized in that the device has a substantially rectangular cross-sectional shape and its front plate (24) is preferably spaced from the rear mounting surface, i.e. the wall (1), so that gaps or slits (48) are left between them, which, preferably in combination with the lateral openings of the side edge portions (50) of the cover plate, allow additional side air flow out. 15 Device according to Claim 1, characterized in that the device (110; 310) has a substantially circular cross-section and is intended to be placed freely on the floor or a corresponding support surface (2), the support rails (126; 326) being round or polygonal. at their outer and inner edges, the size of their central openings thus formed by the inner edges increasing from top to bottom or integral with a downwardly inclined central structure (16) located in the central opening passing through the device, and that the guide rails preferably leave recesses between adjacent bent-up inner edges (328) to receive support plates (330) joined together by suitable central slots and forming a support cross at each level. Device according to claim 1, characterized in that the device (210; 410) has a substantially quarterly or semicircular cross-sectional shape, the guide rails are trapezoidal in shape (226; 426) and have a central leading edge portion of the distribution plate (225; 425). ), the side edges 54670 17 and / or the edges adjacent said distribution plate being bent up or down to form mounting flanges, and that the downwardly sloping rear wall structure (216; 416) is positioned between the side walls 5 of the device and between this and the partition (430), respectively. • c i ♦ il («« 18 94670