DE2317086A1 - DEVICE FOR GENERATING AN AIR CURTAIN - Google Patents

Description

PATENT Pending

.H. NEGENBANK · dipl.-ing. H. HAiTCK · utpi, .- ph \ s. W. SCHMITZ dipping. E. GBAALFS difi> ing. W. WEHNERT

HAMBURG-MUNICH 2317086 DELIVERY ADDRESS; HAMBURG 3O NEW WHALE !, 41

TEL ·. 86 71 28 TTND 3β 4110

TELEOB. NEGEDAPATENT HAMBTTHG

Erling Berner Munich 15 · mozartstr. 23

Box 9, Allison Park tel. ice sauce

Pennsylvania, 15101 / USA τημηϊη. negedapatbnt Munich

Hamburg, April 4, 1973

Device for producing an air curtain

The invention "relates to a device for generating a Air curtain with a in or near a wall opening auge = arranged fan and a movable shutter, such as a sliding or movable double door having spaced inner and outer sections; wherein the central space part of the door forms an air duct which at one end via an intermediate chamber with the fan is in communication and the air through a nozzle as air « the curtain from the other end of the door. More specifically, the invention is directed to a sliding door that has a plurality of has improved features such as insulation and

309842/040 *

lnddichtungen and is further directed to a method for preparing and using an air curtain to provide the with the door _r cooperating to provide optimum protection in case of a ge = opened or partially opened door position, and an improved use of such apparatus for forming a lateral flow to create.

The inner and outer portions of the door form, according to a main feature of the invention, an assembly of numerous panels which are separably or pivotably connected at their edges so that one panel is relatively movable with respect to the next adjacent panel. The assembled panels of the inner and outer sections can usually be moved vertically and slide one on top of the other between guides at each end which seal the inner and outer sections of the wall openings at the opposite ends of the panels. The panels thus form a double door in which one section or both sections can be raised and lowered from the upper, preferably nested position of the panels into an open or partially opened position, the panels with the door closed their .Kanten attack each other in a sealed manner. The spaced-apart inner and outer sections of the double door form between them a continuous sealed air duct for air flow from a chamber of variable size ₉ which is in communication with a fan, which is preferably arranged near the upper wall opening, so that the air down through

- 3 ... 3Ö9642 / CU94

the double-walled! kir to the opposite lower edge flows through the door, where it is usually discharged through a nozzle that forms an air curtain that emerges from the lower Exits the end of the partially or fully opened door.

The door consists of "two vertical rows of separately sliding Flatten, which form the inner and outer sections, wherein the plates are preferably raised and lowered vertically. The plates are in every plate height level progressively offset inward towards the door closing direction, so that each panel is up next to the next vertical Plate slides, with the inner and outer plates telescopically nested in an upper chamber section when the door is opened.

The inner and outer plates can = with the same section height to be connected to each other preferably by webs, so that both plates are vertically in the opening as a pair move and close the door. When the door is opened, a lower pair of panels slides into the next vertical panels = couple telescopically.

Each plate has bent flanges that seal an upper plate with a lower one and a solid, ab = establish sealed engagement between a lower and an upper plate, both of which have a substantial lateral Prevents air from passing through the panels in the sealed position, as well as a mutual reinforcement of an upper one and one lower plate of a pair against vibrations and side wind pressure or weather conditions.

309842/0494 _a

The lower end of the lower pair of plates defines or supports a nozzle with an outlet vertically or pivotably positioned between the inner and outer portions of the door to direct an air curtain either vertically downward or at a desired angle. The upper part of the door has a device for raising and lowering d it inner and outer portion, which preferably includes means to them in aligned telescopically geschach = telter position of Plattena _s nzuheben through to the nozzle during a continuous passage of air from the blower a central opening between the inner and outer sections without resistance and lateral leakage can occur if the panels are vertically sealed in a fully or partially open position of the door. .

Another feature of the invention is the application of insulation to each plate. So every record can have one Have an insulating layer that forms both heat and sound insulation »Such insulation prevents for example moisture condensation through heat exchange with a colder outer wall and causes sound absorption, so that the practical use of the telescopic door is significantly improved. '

Another feature of the invention is that the air is supplied by a tangential fan, one even airflow through the center of the door sections generated.

- 5 -. 309842/0494

According to another characteristic, the flats are all the same dimensioned so that a door can be manufactured from a standardized strip by inserting the same into panels of the desired Length to create the door is cut what a light = Replace a damaged panel with a new panel cut from the strip to the desired length enables. When bending the edges, it is advisable to make the upper edge of the plate slightly larger than the corresponding one, oppositely curved lower edge of the panel, so as to ensure a more secure engagement of the panels in a row forming the door to ensure.

Another feature is seen in the fact that when the door is opened and closed, one pair of open panels are moved from top to bottom out of a chamber which becomes continuously longer as the door is moved approaches the closed position. The pressure of the air blown into the chamber remains essentially constant in spite of the changing length of the chamber when the door is telescopically opened, so that when the door is opened or closed a constant pressure is discharged from the lower nozzle, which is the same as that generated by the nozzle Air curtain gives constant quality and sincerity. So this door causes the He * generating an air curtain from a constant air flow and pressure in each position of the door between the full Öff "voltage or a partial opening selected. In addition, blind openings can be provided at the lower end or at different heights in order to allow a lateral flow from the interior of the door into a seam closed by the door

to be provided. 309842/0484

- b -

25170-86

In addition, the formed chamber preferably having a cross section which is at least three times the nozzle is _o This gives the air curtain a homogenization-ty and strength that a! Turbulence or disruption by © inen page print resists.

Several exemplary embodiments of the subject matter of the invention are described below in connection with the drawings be practiced. It shows

Fig. 1 shows a Äufrißabsehnitt a part which is attached to the Edge of the door panels in the closed position?

Fig. 2 is an end view in section showing the end seal of the closure in the closed position

Pig. Figure 3 shows a detail of a similar view in section of the latch in the closed position an optional other end seal ι

Figure 4 is an end view of the closure with the latch open Plates that take up a nested position, which is shown in section, < about the nesting and the subdivisions of the Depict device for lifting and lowering!

Fig. 5 is a section of the chamber along line 5-5

6 is a similar sectioned end view of the Ver = Closing in a partially open position using a side-mounted fan $

3Ö9642 / 04Ö4 - 7 *

7 shows a further detailed end view of the lock in the open door position and FIG in section, with a tangential at the top = blower is used;

8 shows a section along line 8-8 of FIG. 7, with corresponding flats of the inner and outer Sections of the closure are shown connected to one another by webs;

Figure 9 shows a detail of the edge sealing of a panel the closure with both the upper and lower adjacent panels;

Fig. 10 shows a detail of an edge seal in which the lower end of a plate carries a bolt which is attached to the outer surface of a lower plate attacks;

11 shows a modified edge seal of the plate, at which carries an upper edge of a plate a hollow which engages the inner surface of a top plate;

Fig. 12 shows a further modified plate edge = seal, in which a flexible seal = material between cooperating edge flan = see is attached;

13 shows a longitudinal section of the tangential fan;

Figure 14 is a section of the tangential fan modified for side entry of air;

309842/0494

Figure 15 is an end view of a modified closure which consists of U-shaped, telescopically interlocking = sections, with the after The legs pointing downwards form the flattening and inner, telescopic ineinadergreife21.de tubular channels are provided; and

Yy ¹ Xg. Figure 16 is an end view of a closure similar to Figures 4, 6 and 7, showing the application of insulation to the panels.

Reference is first made to FIG. 1, in which a vertical row of plates 10, 12, 14 and 16 are shown, which are arranged with their ends in opposite, vertically arranged end guides and sealing elements 18 in both sides of a wall opening 20 are to slide vertically in the opening and closing directions and form an outer portion A of a shutter.

As can be seen from Fig. 2, an assembly is a corresponding = corresponding series of plates 11, 1-3, I5 and 17 are provided, the form the inside portion B of the closure. Ss can have a different number of more or less plates than shown to be used to form the closure, depending on its size as well as the size of the individual plates = hangs. .

The plates can be wider or narrower at the top or bottom of the fastener for an economical construction tion or the closure a special one

309842/0494 ' ⁹ '

2517086

To give strength by using wide or narrow plates at these points, if desired. vVie however, shown in Fig. 5, the plates are preferably dimensioned the same in size so that they are of a standardized, larger sized strips can be cut off for different sized doors. In this way everyone is the U-shaped curved strips 11-17 are interchangeable and can easily be replaced if one or more of them is damaged or broken = are disturbing.

All sections A and B are at a distance from each other and can be raised or lowered separately or together, maintaining the distance, but be = preferably handled together as a single closure, as this will become clear. Just below and near the top of opening 20, as shown in FIG. 6, is a fan 21, preferably a tangential blower as described in US Pat. No. 3,362,469, fixedly arranged. V / ie can be seen from the various figures, a chamber is arranged in the upper portion of the wall opening into which the Outlet 23 of the fan 21 opens. The upper end of the chamber 19 has solid side walls 24 and 25, the lower ends of which 26 and 27 with their opposite sides 28 and 29 in any position of the upper, outer and inner closure = Sections A and B are attached to direct air received from the fan into the space G between sections A and B.

The various panels of vertical rows making up each locking section from bottom to top, as in the figures

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2 ^ 17086

2, 3j 4 ·, 5 and 6, are arranged progressively outwards one to the next in the opening direction and can slide one plate on the next when raising and lowering, so that the uppermost plates 28 and 29 each of the lower panels of each section, if the nested sections expand when the door is closed, the chamber 19 continuously expands in the closing direction and thus has a variable size _- when the door opens from the closed over a partially opened to a fully = permanently open position of the door changed «,

As shown in Figure 9, the top and bottom edges of each intermediate panel are bent into a laterally extending TJ shape, downward for reinforcement, the top edge, and upward for the bottom edges of the panels. The bottom plates 10 and 11 habenU-shaped flanges only at their upper edges, while the top """side walls 24 and 25 of the K _a mmer 19 such have U-shaped ge =-bent flanges only at their lower edges 26 and 27 = The upper edges of the larger sliding walls 28 and 29 are flanged to secure the lower edges 26 and 2 of the uppermost side walls 24 and 25 of the chamber 19

9 and 12, a plate IMr is horizontally bent at the upper end 30 with a downwardly directed leg 31 to form an inverted U-shape into which an upwardly bent, Matching IT channel of the next higher plate 16, the flange 32 which is bent inwards

3098 ^ 2/0494

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can fen and a bent-up "leg 33 aufweisr _s = eingrei. As shown, the inwardly and upwardly curved lower flange 32 of the upper plate 16 mates with, but is preferably smaller than, the upper flange 30, but with the smaller U-shaped flange 32 mating with the U-shaped flange 30 the lower plate 14 fits. These flanges are shown as U-shaped, but can have different shapes, as shown in FIGS. 10 and 11. However, they should interlock sufficiently closely as upper and lower separable connections to form a reinforcing channel for each plate. The flanged connections thus provide strength and rigidity to the panels, each receiving and engaging the next adjacent panel in a seal that is relatively gas-tight in order to avoid lateral air leakage through the seal. The interlocking flanges forming the connection form a mutual reinforcement of the neighboring panels so that the panels do not rattle or vibrate in the event of lateral wind pressure and changing weather conditions. On the other hand, these U-shaped flanges allow easy vertical removal and realignment of these flanges by simply moving the plates vertically. Za. the U-shaped bent flanges can be modified in their shape, the term U-shaped bent used here is to be interpreted in a broad sense.

'while the wall opening shown here by a sliding Door is locked, generally for a garage, department store or factory, this opening, when opened,

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is protected by the air curtain to prevent heat exchange between the inner and outer space, The device can be used to protect any opening in a wall, such as a window and printout Closure should therefore be understood in a broad sense.

As shown in FIG. 12, a compliant seal 34 be arranged in the connection to a further Luftab = to achieve seal. The upwardly curved paddock 33 of the plate 16 engages in the upward slide = movement on the inner surface of the plate 14. Correspondingly, the downwardly bent leg 31 of the lower plate 14 engage the inside of the plate 16 as a guide so that the plate 14 moves vertically against the plate 16 slides, with the flange leg resting on the surface of the guide when the door is opened or closed. "

Accordingly, grip and separate a lower, interfitting Connection 35 and an even deeper connection 36 sliding a lower panel with an upper one so that they can be telescopically nested when the door is closed and opened as shown in Figures 2-6. A corresponding set of flanges 37 and 38 between the adjacent ones Plants of the panels of the inner door section B work in the same way as those of section A together to grasp or guide the inner row of panels in order to close the inner door at the same time »

As shown in Figures 4, 5, 6 and 7, a winch = drum 40 rotatably mounted near each end of the door on a shaft driven by a motor 41. Wire ropes 42 are wound around the drums 40. The opposite =

309042/0494 '■ "*"

'13

Put ükiden the ropes 42 extend downward through the middle channel section C of the door and are each on Brackets 43 attached between the lowermost panels. In general, there are two ropes 42 near opposite ends of the door, so that when the winch drums are turned, the rows of flats, starting with the bottom 1G and 11 of the two sections are lifted vertically. There can be inwardly protruding stops 84 on each section in front of = be seen (see Fig.7), which after each section is up Moved up telescopically, fits adjacent to the next vertical section or engages in the next attack vertical section in order to lift it from the telescopic position to the subsequent vertical position until all in the opened or partially opened door are nested =, as shown in Figures 4, 6, and 7 ge = shows is.

As shown, it is preferred to attach connecting webs to the upper ends of pairs of plates which are arranged at the same vertical height in order to connect them to one another in pairs. For example, the lowermost connecting web 46a is welded or screwed tight at ^ 0 to the flange upper edge 36 at each end of the web, the third web extending over the upper 3 ends of the plates 10 and 11. In the same Äeise an upper web 46b connects a second vertical plate pair 12 and 13 and a next higher web 46c connects the plate pair 14 and 15 and the highest web 46 the uppermost plates. In this way, the entire rows of panels of the outer and inner door sections A and B are connected to one another in pairs of the same corresponding height,

30984 2 / (K S £

- 14 -

to move up as a unit when the ropes 42 on the Winch drums 40 are wound, with those with the below = most plates 10 and 11 on both sides of the lower baths

these
steady ropes / raise or lower and then the following ropes =

end pairs of plates of the rows. _ -

The lowest of the interconnected panels 10 and 11 existing pair of plates and usually also a nozzle 44 engage telescopically into the next higher connected plates = couple 12 and 13 a. The plates 10 and 11 and their upper ones Connecting webs 46a engage the corresponding connecting strips 46b of the next higher plate pair 12 and 1j5, so that both plate pairs when the ropes 42 are raised further will then nest telescopically around each other to move up into the next higher pair of plates 14 and 15, nest in them and then into the pair of plates 16-and-17, as shown in FIGS. 4, 6 and 7, it being understood that further pairs of plates can be provided to form the closure. .

The ends of the closure are sealed in channel-shaped portions 18, as shown in Figures 2 and 8, with a channel-shaped portion being provided at each end of the closure. The channel-shaped part 18 has flanges 54- which converge on at least one side from top to bottom, so that the convergence in the closed position corresponds exactly to the inner and outer dimensions of the telescopically connected pairs of plates of the closure _f so that the flanges 54 on d.Attack the bottom edge of each pair of plates to get around the whole rows of plates

303 * 42/0494

- 15 -

by the weights of each higher layer in wedge-like frictional engagement. However, in accordance with one variation is a portion of the flanges as shown 56 inwardly in the plane of the lower end of each plate bent to provide support for a panel in the door closed position. In this construction, the a = supports upwardly bent portion 56 of the flange 54 on a plate each side.

In another embodiment shown in FIG each channel-shaped part 18 has an inner one on the flange 54 in front = have seen support 57, which a series of steps 58 form on which each plate can be supported in the open door = position.

Ss is expedient, the surfaces of each channel-shaped Part 18 with a sealing material, such as a plastic or sponge rubber or preferably polyfluoroethylene to about = pull to prevent air leakage through the ends of the door and to create a seal that prevents friction from reaching the Ends of the closure are reduced in movement while providing an effective end seal.

As shown in Fig. 4, the lowermost plates 10 and 11 are arranged parallel to each other and open at the lower end to to let the air out as a curtain with parallel sides. As shown in Figures 2, 6 and 7, the lowermost plates 10 'and 11 with the opposite sides connected to a nozzle 44, which has a host that is composed of itself

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horizontally and horizontally extending louvre panels 58a "consists of» which are adjustable sideways to vary the downward air curtain from side to side. To continue the, direction of flow in the doorway directions, i.e. to the sides A or B ,. can be changed, as in Fig. 6 As shown, an adjustable baffle 60 may be positioned on one side of the nozzle 44 to prevent airflow within the Yer = Ending in sighting B, if desired 'to distract. That Deflection shield 60 can also be used to deflect in the opposite direction on the opposite side of the nozzle be arranged and extend downwardly from the plate 11 to allow the air flow to the outside of the shutter in direction A. distract.

'According to yet another embodiment, which in detail As shown in Fig. 2, the lower part of the nozzle can end with a slotted shield in the form of a ball joint 62, whereby a deflection by a rotation, but downward ge = directed slot 64 can take place through which the whole The air flow exiting the nozzle can be directed inwards by arrows 66 or outwards by arrows 68 can. . . '■ ·

The tangential fan 21 fixedly on the inner wall 69 near the wall opening 20 sucks air from the inside of the the wall of limited space into the upper chamber 19 · The Ge = blase is preferably a tangential fan, as shown in the US Pat. No. 3,362,469 is described which has a uniform air flow of constant temperature over the entire chamber width in a homogeneous, non-turbulent flow

309842/0494 _Λη -

down through the outlet 23, which then into the upper Chamber 19 enters, in which it is evenly distributed over the entire upper chamber opening 19. The Chamber judges them Downward air flow between the two spaced apart sections A and B of the closure from which the Air exits through the lower outlet nozzle 44 as a curtain.

The closure is partially opened or fully opened together with the nozzle or up to any chosen intermediate position, as shown in Figures 3 »4, 6, 7 and 15 through Rotation of the drums 40 driven by the motor 41, which are arranged in the upper chamber 19, is raised. 3with for = changes the fan 21 a flow of pleasure through its outlet 23 and down through the central passage C, which is a variable Has length what of the open or partially geöff = Neten position of the lock depends and then down through the outlet nozzle 44 which forms an air curtain over the open portion of the door, the length of the curtain being the wall opening which depends on the position of the lock. In this way, air can escape at a fixed point above the door taken from the building and directed downwards through the door to create an air curtain of constant air temperature and quality to create. The lock itself can easily be opened by telescoping it vertically into the top plane of the plate of the closure is pushed together without disturbing or blocking the central air passage through the the air flows.

As shown in Fig. 6, the fan _{f is} preferably a Tan = gentialgebläse 21 _{f arranged} next to the upper chamber 19, so that an air flow 23 through the fan 21 with a constant

309842/0494 -

■ ^ jerk is blown in. Although a conventional axial fan could be used as the fan, the use of a tangential fan has significant advantages, which are primarily to be seen in the fact that it conveys a steady, homogeneous air flow 23 into the chamber 19 ^with minimal turbulence. The fan of FIG. 6 is shown as being located adjacent to the upper chamber 19 to blow air into it laterally. This allows the entire apparatus for creating an air curtain to be located within the wall opening 20 Furthermore, with such a blower arrangement near one end of the closure, the blower can work horizontally with a plurality of chambers 19 'which are moved laterally by oervo means (not shown), in which case the air curtain would be blown sideways or horizontally over the opening 20.

In a modified one shown in Figs Guide form can be the fan on top of the shutter angeord = net, the entire closure being offset inwardly or outwardly from the opening 20, i.e. the outer and inner Section A and B arranged near the wall sides 69 or 71 are, with both a convenient attachment of the fan the chamber 19 as well as a door parallel to the interior or External walls 71 or 69 of the building is made possible.

Ss is of course possible to have a biscuit next to an axial end the chamber 19 to axially introduce air into the chamber, as shown in FIG. To this end can a fan 74 is located in one end 73 of the upper chamber 19 be driven by a motor 75 to air axially to introduce. It is preferred to use the blower as in FIG. 7 shown above the chamber or when the breech block

309842/0494 -19 -

located inside or outside of the opening 20, inside or to be arranged outside of it at a point near the upper part in order to direct the air flow 23 sideways into the chamber 19, as shown in FIG. 6.

From Fig. 6 it can be seen that the chamber 19 when closing the door gradually increases in length from the open position in the closing direction of the door when the interlocking = nested walls move downwards and additional walls wall = sections of the partially closed door. vVenn thus When the shutter is partially opened as shown in Fig. 6, the chamber as a series of chambers is substantial in its own

In contrast to this, when a plurality of chamber sections having the flattening are completely nested within the upper chamber, as shown in FIG. 7, reduced in size, increased in length. The air inside the chamber, which is supplied by the fan 21, has a constant pressure, so that the air discharged from the nozzle or through the parallel plates 10 and 11, which are straight below, is discharged at a constant, angular or downward pressure . Thus, an air curtain with a relatively constant pressure and smooth laminar flow is generated and discharged at the lower nozzle with the same pressure as in the chamber 19, although the height of the door is different between the open and closed position, ie despite the changes in the height or size of the expandable chamber itself.

Experience has shown that if the ratio between the door section of chamber A (which can change when the door is opened) and the total outlet area of nozzle E _& , can be kept greater than or equal to the ratio 3: 1

309842/0494 _ _2Q _

or A / E _a ■■ 3/1 then the change in the air speed at the outlet nozzle can be kept less than 10%. This can be done by the formula for the relationship between nozzle speed U ₀ and wind speed W; X = air = curtain of the nozzle in feet, calculated as follows!

Width 2b _Q = nozzle 'in feet

V2h _Q. 1.68

Can this relationship be shown in the following example?

Given a nozzle speed, 6000 feet / min, and a nozzle width of 3 inches and a nozzle height of 14 feet. An air curtain can correspond to a wind speed. stop the following equation »

W = 6000y ~ ÖT25 x 1.68 «6000 χ Ο, 5] /" 3ΐ = 3OO7 / "~ 12 =

14 100

. . 1040 feet / min. = 12

Miles / hour

Opening height above nozzle speed - max. Stopable Floor in feet of wind speed

Feet / min. Feet / min. Wedges / hour

. 9 '8

As this table shows, a side wind pressure when closing the telescopic door from a height

98 4 2/0494

6000 1040 S. 11.9 6000 1080 -
• 12.4 6000 1120 %
% 12.8 6000 1175 •
• 13.4 6000 1230 •
« 14.3 6000 1300 : 14.9 6000 1380 : 15.8 6000 1475 : 16.9

from 14 barrels to an intermediate ^{height of 7 5 1} UB by the air curtain, that of 11.9 miles per hour to .16.9 miles per hour or (11.9 χ / 14 * 16.9).

«7

increases. '

It can be seen that the protection or resistance to lateral wind pressure provided by the air curtain with the square = root of the distance by which the air curtain is enlarged, increases or vice versa, the cross-section of the chamber is enlarged. The enlargement of the chamber by adjusting the door in a partially open position increases the lateral wind resistance in the square root of the speed through the nozzle.

As shown in FIGS. 2, 3, 6, 7 and 9, each pair of plates slides vertically in the trough-shaped parts 18 arranged at the end a relative to one another in a nested position, the lowest in the next higher, etc. when the closure is opened. Plates 12, 14 and 16, as shown in Figure 10, may each be provided with rollers 68a mounted on inner flanges 33 to engage the outer surface of the next lower plate 14 so that rolling movement of the inner flanges occurs the surface 14 is provided with low friction and scratching of a surface-treated plate. To this end, roller 68a can consist of a series of longitudinally arranged rollers extending in various positions along the flange, or a single roller can be provided.

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309842/0494

As shown in Fig. 11, it may be preferred to use the roller to be arranged on the upper Plansch 31, so that the roller 68a on the The inner surface of the top wall 16 abuts when the panels 14 and 16 slide vertically towards one another. In this way everything becomes Scratching a plate surface onto the inner surface of the Plate limited. Obviously, Roles.68a can go to both the upper and lower flanges.

As shown in Figure 12, it may be desirable to have a sealing or insulating strip between the cooperating flanges 34 to be arranged within the U-shaped bent flange in order to the edge 33 of a flange to increase and a desired damping or sealing effect of a flange with the after = most to achieve. The same sealing strips 34 can be used in the same Manner in the inner bends of the oppositely engaging flanges 32.

According to a modified embodiment shown in FIG the side walls can consist of IT-shaped sections » the one flat, upper section 76 and down gerich = ended pages 78 as shown in TJS Patent 2,057,850. Each of these U-shaped sections is dimensioned so that the lower one engages telescopically with the higher one, so that the group of sections forms a closure from teles = is formed cop-like interlocking sections. The upper, flat webs 76 of a section can be the same have mating and sealing flanges which extend laterally so that a flange 80 of low edge height is formed

with side may extend inwardly to / an upper flange 82 _S

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which extends sideways from the upper web 76 of each U-

extends to a shaped section, tightly cooperate tee »». The upper webs 76 can have a circular cutout 84 into which tubes 86 are inserted. These pipes are sized to telescope vertically from one U-shaped section to the next so as to allow

that the interior of the sections is a series of several telescopic forms interlocking channels to direct the air from the upper chamber 88 into a lower chamber 90, which has a similar nozzle from] ^ 44. The telescopic interlocking series of U-shaped sections as well as the inner tubular channels slide telescopically when opening and closing, so that continuous, telescopic channels are formed. The channels end in the lower chamber 90, below which the outlet nozzle 44 is arranged is to form a downward curtain of air while the series of sliding tubular channels 86 die Air between chambers 88 and 90 each vertically telescoped guide raised position of the sections. While tubular channels are preferred, they can also be rectangular or be shaped in some other way.

With other modifications it is possible that the outer and the inner section A or B is actuated independently of one another, the connecting webs 46 being omitted, while each side plate by inwardly directed extensions of the flanges as shown at 84 and which act as inwardly facing stops, the lowest plate engages the upper on the stop 85, the

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extends inwardly from each flute, as shown in Fig. 7. In this construction, an independent rope 42 is wound on an independent drum 40, each arranged on a separate winch shaft 39 (not shown) is.

Instead of only forming an upper strip as a flange, as shown in FIGS. 11 and 12, the Flange, as shown in Fig. 9, over the entire length of the flatten with or without sealing elements in addition to the Connecting webs 46 extend.

In a modified embodiment shown in Figures 2 and 6, some or all of the plates of the inner Encoded B, facing the wall enclosing the hem openings such as grilles or manually adjustable Have blinds with adjustable slats 92 that can be rotated to an open or closed position adjustable with the blinds extending from one end to the other of an inner panel. So can the blinds 92 can be opened continuously or manually a closed to an open position, depending on Desire to be adjusted so that part of the downward through the central section C of the closure flows laterally at the level of the plate with the lateral openings is distracted. Preferably the blinds are at the lowest Plate provided, but they can be mounted at any desired height so that the side openings in each plate wan band in a desired intermediate = height can be closed or opened.

309842 / 0.494-

The blind openings 92 can also be stationary in a vertical side wall 81 of the upper chamber 19 can be arranged to a fixed upper position for a lateral air flow to be provided from the chamber, whereby the blinds can be opened or closed as desired. In this way, when the door is partially open, the air can flow as an air curtain down through the nozzle 44, to protect the wall opening with a vertical air curtain, while a certain amount of air from the side the upper chamber can be deflected by the blinds as desired.

On the other hand, it may be desirable, when the door is closed, that the blind is in particular in the lowest panel is open to create a sideways flow of air across the floor as the air curtain passes through the floor the wall opening is interrupted in the closed position of the lock. Nevertheless, there is a lateral outflow optionally available at the desired height through the blind.

According to another, in ifig. 16 embodiment the plates can be made of insulating plates 96 »such as Plastic foam or felt against heat transfer through the usually be insulated from thermally conductive metal plates. In particular The insulation prevents the condensation of moisture from the air flow that descends the middle chamber passes through section C of the shutter so that there is no moisture in contact with the cold ones Closing wall forming plates can precipitate.

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309842/0494

While it is customary to symmetrically place both walls i. and B symmetrically insulated inside and outside, in some cases it may be sufficient to insulate only one wall, the temperature of which is more different from the temperature of the air flowing down through the central duct C for the air curtain.

As so far described, a pair of separable panels are assembled into inner and outer sections of a wall lock _9, each of which can be independently lifted and folded in a variety of ways, such as a foldable garage or department store door. In a preferred manner, these locking walls are actuated from a structural unit of opposing pairs of plates of the same height level, which are connected to one another and are offset in the closing direction of the door as a series of telescopically slidable slats, ..., usually and preferably horizontally between the end seals, as Z; B _O U-irons are arranged for vertically raising and lowering, they can also be of the same may be arranged as pairs of vertically arranged Verschlußabsehnitten in a £ wall opening on one side and slidably in a range between an upper and lower

move , 'Bndführung (not shown) / to work on the same principle as the horizontal wall sections and to close a wall opening by sliding from an open to a closed position, ie as a closure from the side of the wall opening.

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30 9842 / 0Λ9 4

Preferably, the x nested pairs are the Flatten connected to each other by connecting webs and held vertically parallel to each other, namely as after downwardly extending legs of the transversely extending connecting webs, so that they are a unitary closure unit form that consists of the transversely extending connecting webs and the downwardly extending legs exist. The continuous walls have U-shaped curved flanges at the top and bottom and continue to support Rollers to avoid scratching one wall on the next while sliding vertically.

The open space between the walls forms an unobstructed passage for air flow from an upper entry point, in which air is blown by a fan, to a opposite outlet end of the passage between the plates, either through two parallel plate walls as Nozzle or can be designed as an attached nozzle to the direct or deflect the exiting airflow.

The construction can thus only serve as a door during certain periods, which is made of strong, preferably telescopic nested units and forms a strong, easily liftable or lowerable closure., each wall section forming a reinforcement and sealing with the next in a compact storage thereof. In spite of this, a sealed channel of variable length is formed between the sections through which the air can pass can flow in the collapsed condition or to any level of the V / and lock extended position. These

309842/0494 - 28 -

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Construction allows simple and permanent mounting of the fan in a wall-enclosed space on the wall in the vicinity of the closure, with a constant and regulated warm or cold internal air supply evenly distributed in a chamber of the wall opening above the closure will. The closure allows various distributions from a central, easily accessible nozzle at the lower end of the closure to form an air curtain at any desired height. A side, inward from the breech
Directed air flow can be provided at any desired height through openings in the inner section.

The invention is not intended to be limited to those described above

Examples of embodiments should be limited, but modifications within the scope of the following claims are also intended to be covered
be. .

Claims (46)

Patent claims Γ} ■ - ι 1.) / device for generating an air curtain that can be attached near a 7 / and opening, characterized by Closing elements (10-17) that move from an open position via an intermediate position to a closed position via the wall « opening are movable away and are composed of an inner and an outer, spaced apart section (B or A) exist, which include a central air duct (C); one depending on the position of the closing elements in their size variable chamber (19) »the one near an edge of the wall = Having an opening arranged side wall (25), into which the outlet (23) of a fan (21) opens, the air to the BiI = The curtain is fed through the air duct to a movable Sn.de on the opposite side of the gammer Outlet nozzle (44) flows, which intercepts the air flow and distributes it as a curtain over the wall opening when the closing = elements are in the open or an intermediate position in the wall opening, each of which is spaced from one another arranged sections (A, B) of a number of adjacent plates (10-17) connected to one another at their edges (30,32) consists; one at the opposite ends of each section (A, B) and attached to the wall opening (20) Guide (54), in which the sections are slidably guided over the opening in the wall, each section dee 7 = The end can slide over the wall opening (20) in the guides (54) at a parallel distance. 309842/0494 2.) Device according to claim 1, characterized in that the plates (10-17) slide progressively in a row when moving into the open door position, one shoulder (30) being within the next (32), and that each Section (A, B) in the open (representation forms a substantially parallel row of nested plates, but the spaced positions of sections (A ₁ B) _{1 are} maintained to free the central air channel (G) ^{; to} allow a free flow of air out of the chamber (19) to be provided as an air curtain through the nozzle (44). 3.) Device according to claim 2, characterized in that the opposing plates (1O ₉ 11) of the lowest pair extend vertically and parallel to one another and form the outlet nozzle (44) for the air curtain between them. 4.) Device according to claim 1, characterized in that the intermediate plates (12-15) bent in a U-shape Flanges (30,32) on each upper and lower horizontal edge, which have a same U-shaped bent flange of the next adjacent upper and lower panels of the row -er = grip, fasten and reinforce, and that the Singriff with the adjacent plates to reinforce and seal the Connection against air passage when closed (Kir serves, however, a sliding movement of one plate vertically to the next when opening and closing the plates of the shutter is possible. equips. 5.) Device according to claim 2, characterized in that the intermediate plates (12-15) bent in a U-shape 309842/0494 Flanges (30,32) on each upper and lower horizontal edge, which have a same U-shaped bent flange of the next adjacent upper and lower panels of the row, grasp, fasten and reinforce the uppermost panels (16,17) the flanges (32) on their lower edges and the lowermost plates (10,11) the flanges (30) on their upper ones Have edges that the flanges (30,32) grip the adjacent plates in order to ver + the connection between them Strengthen and seal against passage through the lift, if the door assumes the closed position, but a sliding movement of one panel vertically to the next in opening and closing of the plates of the shutter. 6.) Device according to claim 1, characterized in that that the guides arranged at the opposite ends of each section (A, B) are U-shaped and have lateral legs (54) which with support elements (56) are provided that each plate (10-17) 3-Q. the closed Support the door position so that the flanges (54) prevent the vertical movement of the spaced sections (A, B) limit and guide between them and the sections (A, B) against essential air passage and the section ends = poetry. 7.) Device according to claim 1, characterized in that the at the opposite ends of each section (A, B) arranged guides are U-shaped and converge from top to bottom to the vertical movement of the mutually spaced sections (A, B) between 309842/0494 to limit and guide their splashing (54 ·) and the down = Sections (A, B) against essential ioft passage at the Ab = to seal cutting ends. 8.) Device according to claim 7, characterized in that the converging flanges (54 ·) of the guides a Have legs of inwardly extending stops (56) each at the lower flange edge (32) attack a plate (12-17) supporting that in the ge = closed position of the closure is at the level of the stop (56). 9 «) door direction according to claim 6, characterized in that that the support elements (56) form a step-shaped frame and each step is arranged on the inside of the flange (54 ·) is to support the lower sac of a plate (12-17). 10.) Device according to claim 1, characterized in that the upper · ends of the plates (10-17) are at the same height by verb in = extending horizontally across the plates extension webs (45) fixed to each other in a pair (10, 11; are
12.13; 14.15? 16,17) / and each pair is arranged within the next vertical pair, so that when the shutter is raised and lowered, each connected pair of plates is nested in the upper adjacent pair of connected plates and all plates (10-17) of both sections (A, B) with their connecting webs when the door is in the open position near the upper end of the wall opening (20) telescope into each other, the air duct (C) through the 309842/0494 . ■ 231708S Connecting webs (45) for the passage of air from the chamber (19) through the nozzle (44) is kept open as an air curtain. 11.) Device according to claim 10, characterized in that each of the plates (10-17) U-shaped bent flanges (30,32) on each upper and lower horizontal edge, which has an identical U-shaped bent flange next to it. grab the bearded upper and lower plates of the legs, increase and strengthen, and that the engagement with the neighboring Barten plates are used to reinforce and seal the connection against the passage of air when the door is closed, but one Sliding movement of one plate vertically to the next is allowed when opening and closing the plates of the shutter. 12.) Device according to claim 1, characterized in that the device (39-41) for raising and lowering the closing = elements (10-17) has at least one rope (42), the lower end of which is attached to the lower end of the sections (A, B) and the other end of which is wound on a drum (40) disposed above the plates, and that a device (41) for rotating the drum and raising and lowering the nozzle (44) and the sections consisting of vertical plates (A, B) is provided. 13.) Device according to claim 1, characterized in that the upper ends of the plates (10-17) at the same height by connecting webs extending horizontally over the plates (45) firmly together in a pair (10,111 sin d
12.13 $ 14.15f 16.17) connected / and each pair within the * - ■ - -κ / .ι 11, ι υ 4 kr u next vertical pair is arranged, so that when lifting and lowering the lock each connected pair of plates slidably nests in the upper adjacent pair of plates and all plates (1Q-17) of both sections © (A ₈ B) with their connection ate When the casing is open, they telescope close to the upper end of the wall opening (20), the air duct (C) through the connecting webs (45) for the passage of air from the chamber (19) through the nozzle (44 ) is kept open as an air curtain, so that the plates (10-1?) Π-shaped bent® flange © (30,32) on each upper and lower horizontal Xante is up @ _s the same U-shaped g®feog @ n Fasten and reinforce the flange of the next adjacent upper and lower panels of the series ®rgr © ifen _s , and that the engagement with the adjacent panels serves to reinforce and seal the connection against the passage of air, but © in © sliding movement of two to a pair connected plat vertically to the next © open during opening and closing en ja d © s Versehtesses g®et tt ^ © t na.d ₈ that are provided for lifting and lowering of the plates (10 ₉ 1?) zvmi © cable, the nah® each d ®m imt © r © n end © are connected to the nozzle (44), while now the opposite ends are wound around a drum (40) arranged in the chamber (19), and that a® device (41) mm Rotation of the drum and raising and lowering of the slide is provided « 14,) Device according to claim 1, -. Characterized in that the upper section d © 2? lama @ r (.19) firmly inside <ä @ r wall opening (20) on the upper f © il d © @. ? © rs.chluss © s nagsbracht contains β VM stone © 1m2% in d @ a ®ittl © r © n Eaua (0) see öi © ^ hlieSabßehnitt © Ci ₅ B) wa guide, and 6 fei 4 ■ bubble (21) firmly next to the wall opening (20) and arranged its outlet (23) is connected to the chamber (19). 15 ·) Device according to claim 1, characterized in that the upper end of the extendable chamber (19) on the Wall next to the wall opening (20) and a fan (21) near one end of the upper chamber (19) is arranged to air to lead axially into the upper chamber. 16.) Device according to claim 1, characterized in that the fan (21) near the upper end of the wall opening (20) near the front end (25) of the chamber (19) is attached, and that the fixed chamber part (19) within the Wall opening (20) is arranged and discharges air laterally into the fixed chamber part. 17.) Device according to claim 1, characterized in that that a 'tangential fan near the top of the wall opening (20) is arranged within the space enclosed by the wall in order to suck air out of it and pass it through the to
Promote closure as an air curtain so that the air curtain has a temperature which corresponds to that of the interior of the enclosed space. 18.) Device according to claim 1 ?, characterized in that that the angential fan (21) next to the fixed end of the chamber (19) is attached and discharges air laterally into the end of the chamber. 309842/0494 19 ·) "Device according to claim 17, characterized in that that the tangential fan (21) over the fixed chamber end "(19) is attached and discharges air downward into it. 20.) Device according to claim 1, characterized in that at least one plate (11) of the inner section (B) Has openings (92) from which air flowing between the sections (A, B) in the closed position of the Ver = Loss can flow out laterally. 21.) "Device according to claim 20, characterized in that that the openings (92) are provided in the lowermost plate (11) in order to extract air into the space enclosed by the wall wear. 22.) Device according to claim 1, characterized in that that at least one of the plates (11) of the inner section. (B) has louvre openings (92) which between a closed position, via an intermediate position, into a fully open position Position are movable to air from the central air duct (C) to separate and laterally in the through the? Found envelopes = to carry out a space. 23.) Device according to claim 1, characterized in that that the nozzle (44) at the lower end of the closure a downwardly flowing air curtain laterally out of the vertical having in an inclined plane deflecting device (60962). 24.) Device according to claim 23 _s, characterized in that the deflection device (60) has a deflection shield (60) which aage = at an adjustable angle under the nozzle (44) is brought. 30984 2/0494 25.) Device according to claim 23, characterized in that the deflection device (62) one to the nozzle (44) rotating = has ble outlet to adjust the nozzle exit angle relative to the center plane of the movable shutter ". 26.) Device according to claim 14, characterized in that the chamber (19) on the inner closure side shutter « Has openings (92) which move from a closed position through an intermediate position into a fully open position = are borrowed to air laterally in the wall enclosed Derive space. 27.) Device according to claim 4, characterized in that the upper edge of each plate (10-15) under the uppermost is designed as a U-shaped flange (30), which in its outer leg (31) carries rollers (68a), the outside of the inner surface of the next adjacent wall of the section attack. 28.) Device according to claim 4, characterized in that the lower edge of each plate (12-17) above the un « first is designed as a U-shaped flange (32) which has rollers (68a) in its outer leg (33), the inside attack the outer surface of the next adjacent wall of the section. 29.) Device according to claim 4, characterized in that in the grooves of the U-shaped flanges (30,32) resilient Sealing material (34) is arranged to attenuate the sound and fill the connection against air passage. 309842/0494 30.) Door direction to generate an air curtain, characterized by a number of chambers C78), whose opposite = overlapping sides communicate with each other to allow air to flow through the strainer from one to the next} a fan (21), the outlet (23) of which is connected to the first chamber of the series, while the last chamber of the series has an open side to allow the air flowing through the row of chambers to exit as an air curtain, the Chambers separably connected one to the next to form a closure for a wall opening (20) and by means for placing and removing one of the chambers from their Positions as a closing element extending over the wall opening. · 31.) Device according to claim 30, characterized in that that the series of chambers (78) are arranged as a closure extending across the wall opening (20), that one Device (39-41) is provided for continuously raising and lowering each chamber of the row in order to bring it into the closed position to bring and to remove from the same, if they open = then in the wall opening up to a selected setting = Baren height with a range from the complete closure of the wall opening over a raised intermediate position up to the full open position near the upper end of the wall opening (20) at « be raised and lowered so that an air curtain in the wall opening through downwards from the lowest chamber (90) escaping air is formed at each set intermediate height of the chambers. 309842/049 ^ 32.) Device according to claim 31, characterized in that the chambers (78) telescopically one into the next of the bottom to the top are nestable, while a passage (86) from one end to the other for an air = flow from the upper blower air source (21) to the opposite end of the air outlet for a through the opening he = stretching air curtain remains open when the shutter is in an intermediate position to fully open Position of the wall opening (20) is. 33 ·) Closure for a wall opening, characterized in that a series of U-shaped sections (78) in front of = is seen, the one upper horizontal wall (76) with downwardly bent legs and seals (34 ·) on each side which extend from one side to the other of the wall opening (20), and the sections during an opening movement Can be nested telescopically, one with the other from bottom to top in the closed position from = interlock in a sealed manner that the chamber (19) has a fixed section attached to the upper end of the closure, in which a device (39-4-1) for raising and lowering the lower and the intermediate sections and for telescopically nesting them in. above section = it can be seen that the lowest section ends with an air curtain = nozzle (44) that a fan near the wall opening (20) is attached that the fixed chamber section (19) = leads to air that each of the U-shaped sections (78) at least has a circular cutout (84) in which a tube-shaped channel (86) is attached, which extends vertically through 309842/0494 each section from the horizontal wall (76) down er = stretches and glides into an aligned next lower, tubular channel engages telescopically, the uppermost tubular channel (86) communicating with the chamber (19), to get air out of it downwards through the telescopically into one = other engaging tubular channels (86) to guide the lowermost section that a nozzle (44) with the lowermost section in Connection is that the air flowing downwards as Luftνor = slope in the wall opening (20) in different open positions of the closure ^ discharges. 34.) Door lock, characterized in that several parallel extending, teles = in the closing direction of the door Cop-like telescoping sections are provided, each with a base section open at the top with downwardly directed Have legs, the legs (78) of each being = over lying section a greater parallel distance from one another than the adjacent legs (33) of the an_sehlie = ßenden portion and the distance between the legs have substantially the same width as - but folded over the Base section of the subsequent section and the Legs of the superordinate sections extend parallel to the base section of the adjoining sections. 35.) Door lock, characterized by several in cross-section = essentially U-shaped when closing the door telescopically telescopic, horizontal sections, the legs of which extend essentially parallel, wherein Side frames (18) form guides (54) and supports for the sections that converge in the closing direction of the door and on 30984 2/0494 attack outer sections of the legs. 36.) Telescopic door, characterized by sections consisting of a series of identical parallel side panels (10-17) exist, each on an edge (30) to the outside and are bent inwardly at the opposite edge (32) so that each side panel is separated from an overlying one Plate and this again the next adjacent plate can grasp when the door is closed and a fixed connection fertilize (35) are created between the side walls, which keep the same at precise distances from each other. 37 ·) Door according to claim 36, characterized in that the outwardly curved edges (30) of the side plates (10-17) somewhat larger than the inwardly curved opposite ones Edges (32) are, and that the outwardly curved edges (30) slide on the inside of the adjacent, above it = βenden plate are supported so that scratching through the inwardly curved edges (32) on the outside of the adjacent plates is avoided. 38.) Door according to claim 36, characterized in that the outwardly curved edges (30) of the side plates (10-1?) are covered with an abrasion-resistant material that minimizes scratching on the inside of the adjacent panels limited. 39.) Door according to claim 36, characterized in that a sealing strip in the sense of each turn (30, 32) 309842/0494 (34) is arranged to open the air passage at the ends of a to diminish each section. 40.) Door according to claim 35 »characterized in that each side frame (18) is provided with a sealing coating is to reduce the friction and the passage of air at the door ends. 41.) Door according to claim 34, characterized in that at least the inner surfaces of the legs (10-17) on one Side of the door are provided with a heat-insulating cover (96). 42.) Device for generating an air curtain for a wall opening, characterized by a stationary fan (21), which is firmly attached to the wall near the wall opening (20) aage = brought; a movable shutter (78) which can be lifted and is disposed in the wall opening such that it can be lowered; © a nozzle (44) extending over the lower end of the closure to create a protective air curtain in the wall opening with differently open, raised slopes the closure ι and telescopically extendable channels (86), carried by the shutter and connecting the movable nozzle (44) to the outlet (23) of the stationary fan (21), to convey air from the fan to the nozzle. 43.) A method for protecting a wall opening against since = borrowed wind pressure, characterized ₉ that a variable in size chamber as a closure a @ r wall opening is used, from which an air curtain from an outlet edge of the chamber as a nozzle-directed air curtain protectively over the opening is discharged as a homogeneous air curtain that the size of the chamber is within a range of one full = permanent closure of the wall opening up to a complete opening of the same, optionally reduced or enlarged while at the same time and accordingly the size of the air = curtain over the opening is decreased and increased, around the wall opening in any selected closed position between the fully open and a partially open and a closed position of the shutter to optionally protect, with all or part of the over the Off = protection supplied in the form of the air curtain and the remaining part of the protection due to the variable size the chamber is formed in the selected closed position. 44.) A method for protecting a wall opening, characterized in that compressed air is supplied to a chamber, whose size in the opening is sufficiently variable to close the land opening in the maximum size form and in the reduced size to leave the opening essentially = borrowed unobstructed, the chamber as Ver = from a fully open position via an intermediate position to a fully closed position in the opening changes, and that the chamber creates an air curtain emerging from an edge which extends across the opening extends and increases in strength and quality to the extent that how the opening is enlarged. 309842/0494 45.) device for generating an air curtain, characterized in that the outlet (23) of a fan (21) is connected to one end of a chamber (19), the other end of which has a nozzle (44), which the supplied air evenly distributed and discharged as a protective air curtain over the hem, and that the chamber consists of a small Size is variable in an essentially multiple of the origin = borrowed size. 46.) Device according to claim 45, characterized in that the size of the chamber (19) "^ on about three times the cross = sectional area of the nozzle outlet (44) up to a size is variable, which greatly exceeds the minimum ratio. 47 ·) Device according to claim 45, characterized in that the chamber (19) has parallel walls (24, 25, 10-17), which consist of plates (10-17) which are slidably arranged one on the next adjacent, so that the entire The cross-sectional area of the chamber is expandable and contractible is. 303842/0494 Blank page