EP0182819A1

EP0182819A1 - False ceiling for workstations

Info

Publication number: EP0182819A1
Application number: EP19850902412
Authority: EP
Inventors: Siegfried Emig
Original assignee: NOVAK Carl
Current assignee: NOVAK, CARL
Priority date: 1984-05-23
Filing date: 1985-05-23
Publication date: 1986-06-04
Also published as: ATA170084A; WO1985005393A1; AT380910B

Abstract

Des locaux de travail dans lesquels montent en particulier des vapeurs contenant des graisses sont dotés d'un faux plafond composé d'éléments de plafond (3) en forme de coupole et semblables à des caissons. Ceux-ci sont suspendus par une construction porteuse (29) sur le plafond de support et s'engagent par leurs bandes de bord dans des profilés en gouttière (4) qui se croisent. Au moins dans les zones de la plus forte production de vapeur sont disposés des éléments de plafond (3) au zénith desquels est prévue une ouverture de passage (8) pour les vapeurs montantes. Chaque ouverture de passage (8) est surmontée d'un écran de déviation (5), un espace périphérique (9) étant laissé sur le côté supérieur de l'élément de plafond (3). Les vapeurs montantes sont aspirées à partir de l'espace intermédiaire séparant le plafond de support du faux plafond, des éléments condensables étant séparés au moins en partie sur les surfaces de guidage de l'écran de déviation (5) et de l'élément de plafond (3). L'écran de déviation (5) comporte de préférence deux parois et est traversé par un milieu d'échange thermique.Work rooms in which vapors containing greases in particular are fitted with a false ceiling composed of ceiling elements (3) in the shape of a dome and similar to boxes. These are suspended by a supporting construction (29) on the support ceiling and engage by their edge bands in gutter profiles (4) which intersect. At least in the areas with the highest vapor production are arranged ceiling elements (3) at the zenith of which is provided a passage opening (8) for the rising vapors. Each passage opening (8) is surmounted by a deflection screen (5), a peripheral space (9) being left on the upper side of the ceiling element (3). The rising vapors are sucked in from the intermediate space separating the support ceiling from the false ceiling, condensable elements being separated at least in part on the guide surfaces of the deflection screen (5) and the ceiling (3). The deflection screen (5) preferably has two walls and is crossed by a heat exchange medium.

Description

Under cover for work rooms

The invention relates to a false ceiling for work rooms in which greasy vapors in particular rise, for example kitchens, with cassette-like, dome-like ceiling elements which are suspended from a supporting structure 5 on the load-bearing ceiling and engage with their edge strips in intersecting channel profiles. wherein the rising vapors are sucked out of the intermediate space between the load-bearing ceiling and the false ceiling through openings in the false ceiling with at least partial separation of condensable components.

Such suspended ceilings have already become known in various versions (AT-PSen 292.271, 334.041, 349.183, 349.705, DE-OS 2 949 235). They are used to condense parts that can be separated from the rising vapors, especially in the areas of the passage openings in which there are increased flow speeds, so that on the one hand the air to be extracted is partially cleaned and on the other hand the deposits 0 on the load-bearing ceiling itself are avoided. The

Passages for the exhaust air to be cleaned are always formed by gaps between the ceiling elements and the channel profiles, in which the condensate collects. Since the gutter profiles are filled with the deposits after a relatively short time despite a S slope into a corner of the room in which a downpipe is provided (AT-PSen 292.271, 334.041, 349.705), their removal and cleaning is necessary. In order to prevent this, AT-PS 334.041 also describes an embodiment in which a spray head is provided at the zenith of each ceiling element, through which a liquid is sprayed onto the underside of the ceiling elements. This is intended on the one hand to improve the separation rate and at the same time to keep the Channel profiles are made. Constant spraying of the ceiling elements is not possible in practice, however, since the dripping of the liquid into the room cannot be avoided. However, the occasional use of the spray liquid is not sufficient for cleaning the then heavily soiled ceiling elements and channel profiles. A satisfactory solution to the problem shown has not yet been achieved, although attempts have been made to at least increase the deposition rate by means of special deflecting surfaces in the passage area (AT-PS 349.183) or double-shell ceiling elements with a large number of offset openings (DE-OS 2,949,235) .

Based on the consideration that with the known means, especially due to the relatively small area of the passage openings, the separation problem cannot be solved satisfactorily, and the automatic cleaning systems only function to a limited extent, so that the disassembly of the elements for thorough cleaning in certain ∑ intervals is unavoidable, the invention has now set itself the task of designing a false ceiling of the type mentioned at the outset, deliberately dispensing with built-in cleaning mechanisms, in such a way that the cleaning intervals can be significantly increased while the deposition rate remains at least constant, furthermore, it should also be possible to disassemble and reassemble the suspended ceiling particularly quickly and easily.

According to the invention, this is now achieved in that the false ceiling has ceiling elements, at least in the areas of the strongest steam development, in the zenith of which a passage opening is provided which is covered by a deflecting screen while leaving a peripheral gap to the top of the ceiling element. The cross-sectional area of this passage opening is chosen to be relatively large, so that a relatively small amount of condensation takes place on the underside of the ceiling elements, and the far greater proportion of which takes place on the invisible top side of the ceiling elements and the underside of the deflecting screen. The cleaning can take place, for example, in that the deposits are removed by means of a spray head of a high-pressure cleaning system which is introduced through the passage opening into the space between the deflecting screen and the ceiling element. The proportion of condensate entering the channel profiles is low, so that cleaning them is rarely necessary. Due to the large condensation surfaces, the ceiling elements and the deflecting screen are also only required to be cleaned at very long intervals if, for example, the suction power is reduced. Particularly favorable conditions can be achieved in that the ceiling element has edge strips which are bent downwards at an angle of less than 90 °, which engage in the channel profiles, and are formed in an increasingly increasing manner from the edge strips to the passage opening in the zenith, one can achieve such shape relatively easily by deep drawing the ceiling elements. The deflecting screen, which is only visible to a small extent, preferably has the shape of a conical jacket. The non-rectangular edge strips, for example bent at 75 °, which are not connected to one another along the common edges, stiffen the ceiling element to a certain extent. However, sufficient flexibility is retained in order to be able to use the ceiling element in corner brackets, for example.

A further increase in the separation rate, which does not shorten the cleaning intervals, can • can be achieved in that a box-like hood with four side walls and a cover plate is arranged above the ceiling element, which has a central opening. The deflecting screen preferably projects through the opening of the, leaving an annular gap

Ceiling tile. As a result, the upper side of the deflecting screen and the lower side of the cover plate in the region of the central opening also become preferred condensation surfaces. In order, if necessary, to be able to individually extract the exhaust air passing through the selected ceiling elements, the entire ceiling element can also be covered by a collecting chamber which is provided with an extraction nozzle for the air extraction. With other ceiling elements that are not covered by any collecting chamber, the air can flow out of the space between

The false ceiling and load-bearing ceiling are suctioned off, so that there are two separate exhaust systems.

Overall, the proposal according to the invention therefore substantially increases the size of all surfaces provided for the separation of the suspended matter in the vapors and greatly increases the cleaning intervals, the condensation of the suspended matter in the channel profiles being greatly reduced, through which only a very small amount of exhaust air passes .

For the mounting of each deflecting screen, it is provided that it is provided on the upper side with at least one fastening part which is held at a distance from the hood. In a first embodiment, the fastening part can be formed by a circumferential flange, which ends leaving a peripheral gap in front of the side walls of the hood. The regions of the side walls near the flange thus form further condensation areas. In another embodiment, a nozzle protrudes from the cover plate of the hood, which the middle opening is limited. From this stand radial pieces of rod to the outside, which are encompassed by upwardly projecting hooks of the deflecting screen. Here too, leaving a gap between the deflecting screen and the lower edge of the pipe socket creates a particularly favorable, annular condensation surface. However, snap connections can also be provided for fastening the deflecting screen to the supporting structure or the hood.

In kitchens in particular, rising vapors have higher temperatures, so that heat recovery by heat exchangers is important. This can take place in a particularly advantageous manner in that the deflecting screen is double-walled and has connections for forward and return flow of a heat exchange medium. It is provided in a preferred embodiment that the return connection is formed at the tip of the deflecting screen. The lines are expediently flexible and connected in any way to a cooling circuit, in which parts of the construction can also be included if their suspension beams are formed by pipes.

As mentioned, particularly easy disassembly and reassembly of all ceiling elements should also be possible, in order, if necessary, to be able to clean all parts having condensation surfaces quickly and thoroughly.

A first embodiment therefore provides for this purpose that the channel profiles have inwardly sloping bent longitudinal edges, and that both adjacent end sections of two edge strips of the ceiling element and adjacent end sections of the longitudinal edges of two channel profiles are loosely inserted in support grooves of a corner holder, which is on the supporting structure the ceiling is suspended. In this way, thanks to the edge strips which are not bent at right angles and are not connected to one another, simply fold the ceiling elements out of the support grooves and then remove them downwards. If the deflecting screen has the flange described, this frees access to fastening elements, for example wing nuts, which are placed on threaded sections of the holding rods penetrating the flange.

To hold down the ceiling elements used, it is provided in a further embodiment that from the two free ends of the mutually perpendicular support grooves of the corner holder, the corner region of the lying ceiling element diagonally bridging, resilient support bracket stands vertically. When inserting the ceiling element, its resilient, horizontal becomes

Center bar pushed up and thus presses the corner area of the ceiling element down.

A perfect fit of the preferably provided hood is achieved in a simple manner by hanging hooks, which are also suspended in the supporting structure. In order to enable easy removal of the channel profiles, a further preferred embodiment provides that the channel profile is shorter than the side length of the ceiling element. The length of the channel profile is such that it can be pushed into the support grooves on one side and finally pushed back into a central position in which it rests on the corner holders on both sides. For dismantling, the channel profile is shifted again in the longitudinal direction, whereby one end emerges from the support grooves of a corner holder, and can then be removed. In the last-mentioned embodiment, a pleasing appearance is achieved in that a gutter-shaped cladding element that seals the joint area of the gutter profiles elastic material, which is formed according to the number of channel profiles L-, T-, Y-, cruciform or radiating, attached to the corner bracket, is pushed onto the channel profiles from below, and engages behind the end sections of their longitudinal edges, thereby simultaneously also leakage of condensate at the ends of the channel profiles is avoided. The cladding elements, which preferably consist of an oil-resistant and at least 200 ° C heat-resistant silicone rubber, allow, together with the non-right-angled ceiling elements and the hoods, the side walls of which are also non-right-angled outwards, to form false ceilings in which the ceiling elements are strongly inclined , for example, are inclined at 45 °. This may be necessary if, for example, beams of the load-bearing ceiling are provided, which are to be clad by the ceiling.

The invention will now be described with reference to the figures of the accompanying drawings, without being limited thereto.

Fig. 1 shows a vertical section through a part of the false ceiling comprising a ceiling element, Fig. 2 in an oblique view a corner bracket, Fig. 3 enlarges the support area on the corner bracket in vertical section, Fig. 4 shows a horizontal section along the line IV-IV 3, with a ceiling element and only one channel profile being shown in only one quadrant for reasons of clarity, and FIG. 5 a representation according to FIG. 1 of a further exemplary embodiment with a heat exchanger.

A false ceiling according to the invention is composed of a large number of preferably square, dome-like ceiling elements 3, which are arranged on a preferred white supporting structure having tubes, corner brackets 19 are carried, which, depending on the installation location in the space L, T, Y, cruciform or radial. A cross-shaped corner holder 19 is shown in FIG. 2 in an oblique view. It has a hook 32 which carries at its lower end four angle plates 33, each bent up to a support groove 21 at the lower edge _. are. From the free ends of the angle lever 33 there is a resilient support bracket 22, the central web 26 of which extends diagonally.

For the arrangement of a ceiling element 3, the required corner brackets 19 are hooked into the supporting structure with their hooks 32, between whose supporting rods or tubes 29 collecting chambers 7 with suction openings 11 are mounted. After the corner brackets 19 have been hung in, a hood 6 is installed, which has a central opening in the cover plate 16 and side walls 18 projecting obliquely downwards. 1, the side walls 18 are provided with their own hangers 34, which are likewise suspended in the support rods or tubes 29. According to FIGS. 3 and 4, the side edges 18 are bent in a cranked manner and triangular-shaped holding plates 35 are inserted into the free corner area and can be adjusted by means of adjusting screws 36 on the hangers 34. A deflecting screen 5, preferably in the form of a cone jacket, is provided on the top with fastening parts, for example with a horizontal flange 12 (FIG. 1), which is penetrated by threaded bolts 13 projecting downward from the cover plate 16 of the hood 6 and is held for example by means of easily detachable wing nuts.

In the embodiment according to FIG. 5, a nozzle 41 surrounding the opening projects downward from the hood 6 and has radially projecting rod pieces 40. Hooks 39 projecting upward from the deflecting screen 5 are suspended in these. When installing the deflecting screen 5, its tip enters the opening of the cover plate 16 in the hood 6 and narrows it in the embodiment according to FIG. 1 to an annular gap 10. per flange 12 has a square outer shape in a size that between the side walls 18 of the hood 6 and the flange 12 likewise only a peripheral gap 14 remains, the cross-sectional area of which is considerably smaller than that of the annular gap 10. In the embodiment according to FIG. 5, the middle opening is chosen larger, but there remains one

Annular gap 10 comparable gap 42 between the deflecting screen 5 and the lower edge of the connecting piece 41. After the deflecting screen 5 has been fastened, the square ceiling element 3 can now be fitted, which has a region which rises in the middle, with a passage opening 8 at its zenith ¬ is formed, which is below the tip of the deflecting screen 5. The edge strips 17 of the ceiling element 3 are bent obliquely downwards at an angle of, for example, 75 °, their end sections 20, which are not connected to one another, being inserted into the support grooves 21 of the corner holders 19. For this purpose, the ceiling element 3, which is slightly bendable due to the oblique, mutually unconnected edge strips 17, is raised somewhat obliquely and then inserted from above. The resilient central webs 26 of the support brackets 22 formed on the corner brackets 19 are pressed upwards when the ceiling element 3 is inserted and then press the ceiling element, which they bridge diagonally, into the support grooves 21, as is shown above all in FIG. 3 becomes clear. If the spring travel of the center webs 26 is too small, it may also be possible to divide them into two sections during assembly, so that two independently resilient web sections remain. This possibility is indicated in Fig. 4 by a dash-dotted cut line 27. Through the Attaching the ceiling element 3 forms a further peripheral gap 9 between its top side and the deflecting screen 5, the cross-sectional area of which preferably corresponds at most to that of the peripheral gap 14.

If all of the ceiling elements 3 of the suspended ceiling are laid in this way, channel profiles 4 are pushed from below over the parallel edge strips 17 of two ceiling elements 3 each. The length of the channel profiles 4, which are approximately V-shaped in cross-section, is at least shorter than the side length of the ceiling elements 3 by at least the length of a support groove 21. The longitudinal edges 23 of the channel profiles 4 are bent downwards towards the inside, the end portions 24 of which also serve to engage in the support grooves 21 of the corner holder 19. The channel profile 4 can thereby be inserted on one side into two parallel support grooves 21 of two angle plates 33 of a corner holder 19, then raised horizontally, the two edge strips 17 of the ceiling elements 3 completely entering the channel profile 4 and then by half the length of one Receiving groove 21 are pushed back, the end portions 24 of the longitudinal edges 23 entering the support grooves 21 of the second corner holder 19. In order to achieve a pleasing view from below and to complete the channel profiles also in the area of the corner brackets, as shown in FIG. 3 in detail, cladding elements 28 are made of an elastic, oil-resistant material, for example silicone rubber or the like. provided that correspond in cross section to the shape of the channel profiles and also have inwardly bent longitudinal edges. These overlap the end sections 24 of the longitudinal edges 23 of the channel profiles and can be snapped on from below. Depending on the type of corner bracket 19, these cladding elements 28 are also L, T, Y, cross-shaped or radiating. The cladding elements 28 thus form one sealing connection of all channel profiles 4 ending in the area of each corner holder 19. All surrounding surfaces of the columns 9, 14, 10 form invisible preferred condensation surfaces, from which liquid condensation products flow to the top of the ceiling element 3 and from there into the channel profile 4. In the area of the sufficiently large passage opening 8 of the ceiling element 3, only a small amount of condensation takes place on the underside. As a result, it is only necessary to clean the suspended ceiling at very large time intervals, which are primarily determined by the extent of the condensation on the visible side of the ceiling elements 3, the size of the other condensation surfaces and the separation space available there being even longer time intervals between two Permits cleaning.

The cleaning can be carried out, for example, by means of a spray head which is introduced into the passage opening 8 and the space between the deflecting screen 5 and ^"~~

Ceiling element 13 cleans without disassembly, where ^' the liquid can flow off via the channel profiles 4. Thorough, complete cleaning can, as mentioned, also be carried out quickly, since it is very easy to disassemble the entire suspended ceiling.

The false ceiling according to the invention can have the ceiling elements described in particular only in those areas in which the strongest steam development takes place, for example above the cooking zone in kitchen systems. Since these vapors have higher temperatures, it is provided for the heat recovery in the embodiment according to FIG. 5 that the deflecting screen 5 forms a heat exchanger. For this purpose, it is double-walled and provided with connections 37, 38 for the forward and return flow of a cooling circuit. The return connection 38 is preferably provided at the tip of the deflecting screen 5. The lines 43 are made of flexible material so that they can be laid without problems according to the arrangement of the ceiling elements 3 selected for the suction and reinforced condensate separation. The pipes 29 of the supporting structure can also be integrated in the cooling circuit.

In the areas with low steam development, ceiling elements 3 without a central opening 8 can also be provided. Since there is no extraction here, the separation of condensation products is relatively low. These then flow from the underside of the ceiling elements 3 into the channel profiles 4, which for this purpose are preferably provided with small passage openings 25 on their bent longitudinal edges 23. For reasons of the simplified manufacture of the channel profiles 4, as can be seen in FIGS. 3 and 4, all channel profiles 4 used are provided with such through openings 25.

The cladding elements 28 made of silicone rubber or the like, as well as the edge strips 17 of the ceiling elements 3 and side walls 18 of the hoods 6 sloping outwards also allow the levels of the load-bearing ceiling to be clad with the suspended ceiling throughout, since the inclination of Ceiling elements up to 45 ° are possible. The suspension of the ceiling elements 3 on the corner bracket 19, the design and arrangement of the V-shaped channel profiles 4, and the design and arrangement of the cladding elements 28 are of course also possible with ceiling elements 3 without a central opening 8 and without exhaust air extraction.

Claims

Patent claims:

1. suspended ceiling for work rooms in which greasy vapors rise in particular, for example for kitchens, with cassette-like, dome-like ceiling elements,

5 which are suspended from a supporting structure on the load-bearing ceiling and engage with their edge strips in mutually intersecting channel profiles, the rising vapors condensing through openings in the ceiling with at least partial separation.

0 barer constituents are sucked out of the space between the load-bearing ceiling and the false ceiling, characterized in that the false ceiling has ceiling elements (3) at least in the areas of strongest steam development, in the zenith of which a passage

15 step opening. (8) is provided, the. is covered by a deflecting screen (5) leaving a peripheral gap (9) to the top of the ceiling element (3).

2. suspended ceiling according to claim 1, characterized in that the ceiling element (3) at an angle less than 90 °

20 has edge strips (17) which are bent downwards and which engage in the channel profiles (4) and which are formed in an increasingly increasing manner from the edge strips (17) to the passage opening (8) in the zenith.

3. suspended ceiling according to claim 2, characterized in that 25 the edge strips (17) are bent down at an angle of 75 °.

4. suspended ceiling according to claim 1, characterized in that the deflecting screen (5) has the shape of a cone shell.

5. suspended ceiling according to claim 1 or 2, characterized gekenn¬ characterized in that above the ceiling element (3) a box- like hood (6) with four side walls (18) and a cover plate (161 is arranged, which has a central opening.

6. suspended ceiling according to claim 4 and 5, characterized in that the deflecting screen (5) protrudes leaving a Ring¬ gap (10) through the opening in the cover plate (16) of the hood (6).

7. suspended ceiling according to claim 5 or 6, characterized in that the deflecting screen (5) is provided on the upper side with at least one fastening part which is kept spaced on the hood (6).

8. Suspended ceiling according to claim 7, characterized in that a circumferential flange (12) is seen as a fastening part, which ends leaving a peripheral gap (14) in front of the side walls (18) of the hood (6).

9. Suspended ceiling according to claim 7, characterized in that a plurality of hooks (39) are provided as fastening parts, which embrace radially extending rod pieces (40), which from one of the hood (6) while leaving a gap (42nd) ) protrude to the deflecting screen (5) downward protruding nozzle (41).

10. suspended ceiling according to one of claims 1, 4, 6 or 7, characterized in that the deflecting screen (5) is double-walled, and connections (37,38) for forward and return of a heat exchange medium has.

11- suspended ceiling according to claim 4 and 10, characterized gekenn¬ characterized in that the return port (38) is formed at the tip of the deflecting screen (5).

12. Suspended ceiling according to claim 1 or 2, characterized gekenn¬ characterized in that the channel profiles (4) have inwardly sloping bent longitudinal edges (23), and that both adjacent end portions (20) 5 of two edge strips (17) of the ceiling element ( 3 and also adjacent end sections (24) of the longitudinal edges (23) of two channel profiles (4) are loosely inserted into support grooves (21) of a corner bracket (19) which is suspended from the supporting structure of the false ceiling.

1013. Suspended ceiling according to claim 12, characterized in that each bent longitudinal edge (23) of a channel profile (4) has a series of openings (25).

14. Suspended ceiling according to claim 5 and 12, characterized gekenn¬ characterized in that from the two free ends of the 5 mutually perpendicular support grooves (21) of the Eci ___ holder (19) a corner area of the overlying ceiling element (3) diagonally bridging, resilient Support bracket (22) stands vertically, the horizontal central web (26) serves as a hold-down device for the corner area o of the ceiling element (3).

15. suspended ceiling according to claim 12 or 13, characterized gekenn¬ characterized in that the channel profile (4) is shorter than the side length of the ceiling element (3).

16. Suspended ceiling according to claim 15, characterized in 5 that a the joint area of the channel profiles (4) sealing, channel-shaped cladding element (28) made of elastic material, which according to the number of channel profiles (4) attached to the corner bracket (19) L-, T-shaped, Y-shaped, cross-shaped or radiating, is pushed onto the channel profiles (4) from below, and engages behind the end sections (24) of their longitudinal edges (23).