WO2015197180A1 - Air induction device for ventilating and controlling the temperature of rooms and associated method - Google Patents

Abstract

The invention relates to a method for ventilating and controlling the temperature of rooms according to the principle of dilution ventilation, wherein a primary air flow (40) is introduced into the ceiling cavity (30) of a room (4), which room is partitioned off from the story ceiling (26) by a suspended ceiling (31), and said primary air flow is introduced into the room (4) via leaks (41, 42, 43) in the suspended ceiling (31), wherein the primary air flow (40) produces a secondary air flow (33) as an induction air flow in the ceiling cavity (30), which secondary air flow sucks a room air flow (32) from the room (4) into the ceiling cavity (30), mixes the room air flow with the secondary air flow (33), and introduces the room air flow into the room (4) as a tertiary air flow (34) via the leaks (41, 42, 43) in the suspended ceiling (31).

Description

 AIR INDUCTION DEVICE FOR VENTILATION AND TEMPERATING OF SPACES AND

 ASSOCIATED PROCEDURE

The invention relates to a method and a device for ventilation and temperature control of rooms according to the preamble of claim 1.

Such a method and a device belonging thereto has become known, for example, with the subject matter of EP 1 325 268 B1. In this known device cooled fresh air is blown into the ceiling cavity of a room to be tempered, and there occurs at each of the slot-shaped, ceiling-side connections of the ceiling to the respective room wall in the room.

Disadvantage of this arrangement is that undesirable draft phenomena occur on the ceiling connection side to the room wall and in particular also unpleasant temperature differences occur in the room itself, because the air outlet on the room wall side ceiling connection is very different compared to the center of the room. With the subject of DE 40 15 665 C3, an induction air flow is generated in the ceiling cavity, which consists of a primary air flow along the upper side of the lower ceiling along the lower ceiling and flows through ceiling connection-side limiting elements in the room on the wall side of a room. The air in the room is sucked out via extraction fans below the lower ceiling. With this method, there is the disadvantage that the primary air can not be blown in at a low temperature because there is no prior mixing with the room air.

In an apparatus according to DE 43 08 969 C1, the admixing of a primary air provided with cooled air takes place in a parallel to the ceiling longitudinally extending air duct, wherein the effluent from the air duct primary air is guided along the ceiling. There is no mixing with the room air Instead, because the ceiling cavity is used only for the air mixing of the primary air flow over the surface of the suspended ceiling, but an admixture of the room air does not take place. This has the disadvantage that, if there is no admixture of the room air in the primary air flow, the room air is not tempered.

With the subject matter of DE 100 64 939 C2 a method and a device used for this purpose is described, which consists of a blower blowing the primary air parallel to the floor ceiling in a ventilation apparatus, which is suspended from the ceiling and designed as an air distributor.

The air blown into the free-jet air-conditioning apparatus partly mixes with the room air before it enters the ventilation apparatus and is blown out of the room via distribution nozzles. Disadvantage of this arrangement is that a false ceiling is missing, and instead a Luftverteilapparat is suspended on the floor slab, which is associated with a lot of effort. Another disadvantage is that the free jet blowing of the primary air with the help of a blower at the top of an air distributor undesirable turbulence, resulting in an undesirable noise in the room. The free-jet injection at the top of the room air distributor forms an air roller extending over the entire volume of space, which leads to undesirable floor and air speeds. It is an object of the invention to further develop a method and a device for controlling the temperature of rooms with suspended suspended ceilings according to EP 1 325 268 B1 or DE 40 15 665 C3 in such a way that a considerably lower temperature control achieves a room climate of low scum is reached.

To solve the problem, the invention is characterized by the technical teaching of claim 1. An essential feature of the invention is a method whose realization provides the advantage that at relatively low air velocities a low-turbulence flow in the room is achieved, and that the heating or cooling capacity of a floor ceiling due to the mixing of the primary and the secondary air flow in the space between the floor slab and the sub-ceiling is used for the air conditioning - or more generally for the temperature control. With the present invention, it is therefore proposed that a primary air flow in the ceiling cavity above a false ceiling over a laid in the ceiling cavity and arranged approximately parallel to the floor ceiling nozzle channel on the underside - arranged on the nozzle channel - primary air nozzles is directed against the top of the ceiling and against supply air in the lower ceiling which are directed into the room.

The ventilation principle of the invention makes use of an air induction. This effect means that introduced primary air, entrains other existing air and mixes it. Ventilation and air-conditioning technology uses air inlets in the room for dilution ventilation, which can already mix considerable amounts of room air with the inflowing primary air. After this effect takes place in the area of a ceiling cavity above a ceiling closing the room upwards, a laminar, draft-free flow in the room is achieved.

With this technical teaching, there is the advantage that a primary air flow is generated in the region of the ceiling cavity, which is directed against the upper side of the lower ceiling and arranged there (air-conducting) Zuluftöffnungen, wherein the primary air flow flows in through the underside side Zuluftöffnungen into the room and due to the flow conditions a negative pressure in the ceiling cavity is generated, which ensures that air is sucked through leaks in the ceiling cavity in the ceiling cavity, the itself is mixed as a secondary air flow in the ceiling cavity with the primary air stream, and then discharged into the room.

Advantage of this measure is that the room air is assigned a larger exchange surface, because by the introduction of the room air in the ceiling cavity a (there existing) increased heat exchange surface for the temperature of the room air is achieved, and thereby a more uniform and better temperature control of the room air is possible. The heat capacity of the ceiling covered by the false ceiling in the ceiling cavity and also the heat capacity and cooling capacity of the false ceiling are exploited.

The advantage of this measure is that the admixing of a primary air flow (induction air flow) and a secondary air flow sucked in (induced) from the room air take place in the ceiling cavity itself. This has the advantage that the bottom of the floor slab can also be used as air conditioning or heat distribution surface, so that an additional, high heat capacity can be used because the heat capacity of the floor ceiling of a building is also used for the temperature control of the secondary air flow.

In the prior art was always the admixture of a secondary air flow in the room itself, that is below the ceiling cavity in the room and not - as in the invention - above the ceiling cavity in the area between the top of the ceiling and the bottom of the floor ceiling.

With the given technical teaching has the advantage that now for the first time the heat capacity (or cooling capacity) of a possibly tempered floor ceiling can be used, and that thus the lower ceiling can be tempered, which was previously possible only by consuming additional measures. A particularly low-turbulence distribution of the primary air flow and the secondary air flow mixed there into the room takes place in that the supply air openings in the lower ceiling are distributed over a very large area of the lower ceiling.

It is preferred if the Zuluftöffnungen extend over about two thirds or half of the length of the individual ceiling panels, the profile shape, length and arrangement of Zuluftöffnungen can be varied within wide limits.

In a particular embodiment of the invention, it is preferred if the supply air openings, which break through the ceiling panels in an air-tight manner, are designed as air diffusers.

This presupposes in each case that the primary air jet, which is directed from the primary air nozzles of the nozzle channel against the upper side of the lower ceiling, meets approximately in alignment with the Zuluftöffnungen. The Zuluftöffnungen preferably consist of a conically widening profile. Due to the directed blowing of the primary air flow into the conically widening on the room side, the underside-side air inlet openings, there is a radical reduction in the air velocity in their area.

The air velocity of the primary air entering the diffuser opening of the supply air opening is initially large. When passing through the diffuser opening, the air velocity of the primary air decreases sharply and there is a Nachsaugeffekt of room air, which is sucked into the ceiling cavity from the room. If the primary air enters the room through the supply air opening in the lower ceiling, it then only has a speed of 2 meters per second, for example, while the velocity of the primary air flow is at the inflow side is approximately in the range between 10 to 12 meters per second.

It is particularly advantageous that an induction coefficient of 10 or more is achieved by the induction of the nozzle channel in the ceiling cavity. Thus, for example, 10 parts of the withdrawn from the room secondary air at a temperature of, for example, 24 ° C with 1 part of the primary air, for example, 12 ° C, resulting in leakage of mixed air into the room with a temperature difference to the room temperature of a degree Kelvin leads.

As an example of the dimensioning of a cooling ceiling according to the invention with a so-called "hybrid Eco Boost" it is stated that the primary air with a volume in the range of 6 cubic meters per hour and per square meter floor area of the room up to an air volume of 7.2 cubic meters per hour and exits the primary air nozzles of the nozzle channel per meter.

The slot length or the slot cross-section of the primary air nozzles in comparison to the slot cross-section and the slot profile shape of the air flowed from the primary air nozzles almost aligned, the cover plate side Zuluftschlitzen is much larger. With a slot width of the primary air nozzles of 1 mm, the undercut-side supply air openings (or supply air slots) arranged in alignment with them have a slot width of 12 mm.

The area ratio of the discharge area of the primary air nozzles in relation to the area of the supply air slots or supply air openings is about 1: 160. The distance between the outflow side of the primary air nozzles and the inflow side of the vertically arranged opposite, undercover side Supply air openings is in a preferred embodiment at 56 mm. The air-carrying (vertical) total length of the lower ceiling breaking supply air openings is preferably 17.9 mm. Each supply air opening preferably consists of a cone part arranged on the inflow side, which merges into a cylinder part directed into the space. The inflow side cone part has a diameter of eg 42 mm with a vertical length of eg 7 mm. The air-tight adjoining, directed into the room cylinder part has a diameter of 12 mm with a vertical length of eg 1 mm. From these proportions it also results that with a relatively low temperature control of the primary air flowing, for example, with a temperature of 10 ° C, an optimal temperature of the room air takes place, because only 1 part of the primary air with 10 parts of the secondary air, from the Room comes, is mixed and a low-turbulence, takes place at low air speed through the lower ceiling taking place in the room.

The primary air nozzles form a mixing zone arranged in the ceiling cavity for mixing between the primary air and the secondary air. As an exemplary embodiment, it is stated that a primary air flow having a volume of approximately 66.6 cubic meters per hour and based on one square meter of the bottom surface of the room to be tempered is generated, whereby the temperature of the secondary air flow reaching the mixing zone (which originates from the room air) has a temperature of about 26 ° C.

In the exhaust air inlet openings of the lower ceiling, which open into the room on the ceiling side, an air flow of, for example, 72.6 cubic meters per hour per square meter of room area is generated, this air being tempered, for example, to a temperature of 24.7 ° C.

This results in the advantage of the invention that with a small proportion of air of the primary air, which can be cooled down to a low temperature, for Example, at 10 ° C, a low-turbulence, low-caloric room temperature in the range between 22 to 24 degrees Celsius can be generated.

Another advantage is that, when the building's outside temperature is relatively cold, it is then sufficient to inject the drawn from the outside air primary air at this low temperature in the nozzle channel and induce in the ceiling cavity an admixture of secondary air before the mixed air into the room is introduced. After the induction air ratio in the range between 5 and 20 is preferably between 8 and 12 and particularly preferably 10, it is sufficient to mix 1 part of the primary air with 10 parts of the room air.

The advantage of this measure is that the air drawn in from the building environment at low temperature does not have to be additionally heated, which is the case with other temperature control methods.

Accordingly, since only a small proportion of the primary air, which may be tempered to a low temperature, is mixed with the secondary air, it suffices to mix the primary air at a relatively low temperature because, for example, the induction number is 10 or more.

For the sake of greater clarity, reference numerals will be used hereinafter, which can be taken from the enclosed drawing. It is particularly advantageous if the primary air in the form of a pointed core zone 37 flows out of the primary-air nozzles 36 of the nozzle channel 25 at high speed, and is directed in alignment with the diffuser openings of the supply-side openings 41. It is therefore a primary air-side free emitter, the beam propagation takes place initially in the form of an acute-angled round or flat Strahlkems, which subsequently - at a greater distance from the discharge opening merges into a mixing zone. In the area of the pointed round or flat jet core, a laminar jet path of the primary air and in the mixing zone following it in the longitudinal direction results in a turbulent jet path. The jet axis of the primary air nozzle 36 is directed in alignment with the undercutting-side supply air opening 41 and the distance between the primary air nozzle-side core zone 37, which generates the core jet and the primary air flow 40 receiving undercover-side diffuser 43 is selected so that the mixing zone forming in the axial direction of the core jet the primary air reaches into the under-side diffuser 43. This ensures that the air induction takes place in the ceiling cavity, ie above the ceiling and not below the ceiling.

Due to this aligned juxtaposition of the primary air nozzles 36 to the concealed air intake openings 41 results in a diffuser effect in such a way that the maximum possible negative pressure in the mixing zone between the outlet of the Primärluftdüsen and the entrance of the underside arranged Zuluftöffnungen, and thereby the maximum negative pressure for the admixture the secondary air flow is used.

It is important that the secondary air flow is completely recovered from the room air, through leaks in the lower ceiling 31. It is assumed that a lower ceiling 31 covers the entire floor ceiling 29 and thereby an air-technical separation between a floor slab 29 and one to be tempered Room 4 is created. The lower ceiling 31 may be formed of individual, a continuous ceiling forming ceiling panels 8, 9. Instead of individual interconnected by connecting and supporting profiles ceiling panels and a continuous plate, a fabric web or other web or plate-shaped structures can be used. These web or strip structures should be at least partially air permeable. Such leaks can be generated in various ways.

In a first embodiment of the invention, it is provided that the ceiling plates longitudinally delimiting distance joints are at least partially open, for example, have a cross section of 5 mm and over the - entire length of the ceiling plate of for example 1, 20 to 1, 50 m extend.

As a result, slit-like leaks are generated longitudinally and peripherally of the ceiling panels, via which the room air is sucked from the room into the ceiling cavity, where it is admixed as a secondary air flow to the primary air flow.

In another embodiment of the invention, it is provided that the leaks are generated in the lower ceiling by existing on the transverse sides of the ceiling panels, edge open gap joints.

In a third embodiment of the invention, it is provided that even openings are provided in the ceiling panels, through which the room air is sucked into the ceiling cavity. Such openings may be formed as slots, holes, perforations or the like.

In a fourth embodiment of the invention, it is provided that the ceiling panels are airtight in itself, but on its wall-side room connection side targeted leaks are attached, such as open joints or the like.

In a further embodiment of the invention, it is also provided that the heat or cold of the floor ceiling is used for temperature control of the guided in the ceiling cavity air flow. In the first, previously described embodiment, it was assumed that the floor slab was at a common temperature, which corresponds to the temperature of the entire building. In a second embodiment it is provided that the floor slab is additionally cooled. Here it is particularly advantageous if additional temperature control registers are arranged in or on the floor slab. Of particular advantage is the arrangement of Temperierregistern in the floor ceiling itself, which are completely enclosed in the floor ceiling of the concrete.

This results in the advantage that the floor slab can be cooled during the night - at relatively low outdoor temperatures - and this cooling is turned off at the beginning of the operating time. The floor slab then remains in the cooled state due to its heat capacity and additionally cools the mixed air generated in the ceiling cavity before it is induced into the room.

The air quantity of the primary air is regulated depending on the room load, which means that at high temperature in the room a larger amount of cooled primary air is supplied than comparatively at a lower temperature.

Of particular advantage in this embodiment is that the heat or cold capacity of the possibly cooled (or generally tempered) floor slab is additionally used for tempering the air coming from the room air secondary air, and all air mixtures take place in the ceiling cavity and not in the room itself, resulting in discomfort Could lead to drafts. By controlling the amount of primary air, the heat output or the heat absorption of the floor ceiling to the room is variable. Thus, the room temperature is adjustable. In a conventional BKT system, this is not possible because the heat output is determined by the heat-generating elements in the room and can not be regulated depending on the heat capacity of the floor ceiling.

In a third embodiment of the invention, it is provided that not the floor itself is tempered, but the lower ceiling. According to the invention, in this exemplary embodiment, temperature control registers are laid on or in the lower ceiling which guide a medium flow along which preferably receives a cooled or heated heat transfer medium as the liquid flow. The advantage of this measure is that the false ceiling has a double benefit, namely once as ventilation separation of a mixing room, which is located in the ceiling cavity below the floor ceiling and above the room, and that the lower ceiling itself is still designed as a cooling or heating blanket.

The cooling or thermal performance of the lower ceiling is increased by the double exchange surface to the room and the cavity side side massive. Another advantage of the invention is that during the night mode used for cooling the lower ceiling temperature control simultaneously cool the bottom of the floor ceiling, and charge with a certain amount of cooling, which can then be discharged again during the daytime operation.

This advantage results from the technical teaching according to the invention, that in the cavity between the false ceiling and the floor slab a Mixing of a primary air flow with a coming from the room air secondary air flow takes place.

The subject of the present invention results not only from the subject matter of the individual claims, but also from the combination of the individual claims with each other.

All information and features disclosed in the documents, including the abstract, in particular the spatial design shown in the drawings, are claimed to be essential to the invention insofar as they are novel individually or in combination with respect to the prior art.

In the following the invention will be explained in more detail with reference to drawings showing only one embodiment. Here are from the drawings and their description further features essential to the invention and advantages of the invention.

FIG. 1: top view from the room side onto a first embodiment of a lower ceiling

Figure 2: same view as Figure 1 with representation of further ventilation details

Figure 3: the bottom view of a room according to Figures 1 and 2

Figure 4: schematically in section and greatly increases the admixture of a primary air flow in the ceiling cavity with a secondary air flow FIG. 5 shows the plan view of the arrangement according to FIG. 4 with only the representation of the primary air nozzles in comparison to the concealed side air intake slots. FIG. 6 shows a perspective view of the air duct according to FIGS. 1 to 5 in a first exemplary embodiment

Figure 7: perspective view with a view of a lower ceiling with the arrangement of differently shaped air inlet openings

FIG. 7a shows differently shaped supply air openings compared to FIG

FIG. 7b shows a modified embodiment in comparison with FIG. 7a; FIG. 7c shows a modification with respect to FIGS. 7a and 7b

FIG. 7d shows a further embodiment of the supply of room air to the upper side of the lower ceiling. FIG. 7e: further exemplary embodiments for the supply of room air into the ceiling cavity of the lower ceiling

FIG. 8 shows a sectional view of an embodiment modified with respect to FIG. 3 with the temperature control of a floor slab

FIG. 9 shows a plan view of the arrangement of the lower ceiling according to FIG. 8

Figure 10: a comparison with Figure 8 modified embodiment in which the lower ceiling is additionally tempered

FIG. 11: the plan view of the arrangement according to FIG. 10 FIG. 1 generally shows a room to be tempered and ventilated, such rooms being, for example, administrative rooms, offices, shopping center rooms, living rooms, multipurpose rooms, sports rooms, meeting rooms or meeting rooms.

It is shown only schematically that such a space is limited by a corridor 1, the hall dividing walls 2, which are broken by door elements 3. The door elements 3 each lead into a space 4, the tempered according to the invention or - generally - to be cooled and heated.

The room is bounded by lateral partitions 5, the facade end in facade supports 7. Between the facade supports 7 windows 6 are arranged. The ceiling side of the room 4 is formed by a lower ceiling 31, which is formed from a plurality of closely abutting ceiling panels 8, 9.

The ceiling panels 8 are formed rectangular in the embodiment shown and have, for example, a size of 0.6 m x 1, 70 m.

The ceiling panels 8 are not necessarily rectangular. They can take any shape. They may be oval, round, trapezoidal, triangular or otherwise profiled. It is important that in a preferred embodiment of the present invention, two different types of ceiling panels are used, namely once ceiling panels 9, which are not provided with a longitudinal slot, and further ceiling panels 8 having a longitudinal slot, which is referred to as Zuluftschlitz 42 later.

In the exemplary embodiment shown, the longitudinally adjoining ceiling panels 8, 9 open spacing joints 10, which preferably over the entire length of the abutting one another Ceiling plates 8, 9 extend and have a width of, for example, 5 mm.

The spacer joints 10 are permeable to air and open into the room. The adjoining transverse joints of the ceiling panels 8, 9 are impermeable to air in the illustrated embodiment.

In accordance with FIG. 2, an air distributor system 12, which essentially consists of a main channel 15 which extends on the flurse side and which generates an air flow 14 in outlet pipes 13 branching off from it, opens into the room.

The air flow 14 is first fed into a volumetric flow regulator 16, at whose output a silencer 17 is arranged, which opens into a supply air pipe 18, which introduces the primary air flow conditioned in the direction of arrow 19 into one or more distribution pipes 20 leading into the space.

In the embodiment shown, only one leading into the space 4 manifold 20 is shown. The invention is not limited thereto. It can also be arranged a plurality of mutually parallel distribution pipes.

In the exemplary embodiment shown, the distributor tube 20 is connected to one or more transverse tubes 22 in an air-tight manner, wherein the one or more transverse tubes 22 is connected to one or more distributor tubes 21.

The nature of the air distribution in the space 4 is thus shown arbitrarily and can be changed in many ways.

The primary air supplied into the space in the direction of the arrow 19 via the distribution pipes 20, 21 divides the air stream 40 into a plurality of branches perpendicularly or at least at an angle from the distribution pipes 20, 21 via connecting pieces 23 with the distribution pipes 20, 21 connected nozzle channels 25 in an air-tight manner.

The nozzle channels 25 are constructed structurally the same. But because they are located locally in different places in the room 4, they are designated 25a, 25b, 25c, 25d.

In the exemplary embodiment shown, for example, the window-side nozzle channel 25d ends parallel to the window 6.

FIG. 3 shows the sectional view of the structure according to FIGS. 1 and 2. It can be seen that the air distribution system 12 is arranged in the flush mop cover 24 in the corridor 1, and the air guide elements are arranged in a ceiling cavity 30, which is laid in the space Floor ceiling down over the entire surface covering ceiling 31 is formed.

In the area of the ceiling cavity 30, the mixing of the primary air flow 40 with a secondary air flow 33 drawn in from the room air flow 32 into the ceiling cavity 30 takes place.

Characterized an induction air flow is generated, which is designated in Figure 3 by the reference numeral 40 as primary air, which radiates through associated, arranged in the lower ceiling 31 Zuluftöffnungen 41 into the room, wherein in Figure 3, the velocity profile of the guided into the room Tertiärluftstromes 34 shown is. It can be seen that the velocity profile of the tertiary air flow 34 decreases sharply at a distance from the undercut-side supply air openings 41. The undercounter side air inlet opening 41 are preferably formed as a slot opening, wherein the air velocity initially arising in the supply air opening 41 decreases from two meters per second at a distance from this supply air opening 41 to about 0.15 meters per second. This results in the proof that a low-turbulence, relatively draft-free room air in the form of a ventilation and temperature control with a tertiary air flow 34 is generated. The tertiary air stream 34 consists of a tempered primary air stream 40 and a secondary air stream 33 extracted from the room air stream 32.

In the figure 3 it can be seen that the room air flow 32 is sucked through leaks in the lower ceiling 31 in the ceiling cavity 30, where it is mixed as a secondary air stream 33 to the primary air stream 40.

Such leaks are for example - as mentioned in the general part of the description - the distance joints 0 between the ceiling panels 8, 9. In the embodiment of Figure 4, the admixing of a secondary air flow 33 to the primary air flow 40 and the resulting generation of a Tertiärluftstromes 34 is shown schematically.

Starting from the nozzle channel 25, a number of spaced primary air nozzles 36 are arranged on the bottom side of the nozzle channel, which are formed as round nozzle openings with a diameter of, for example, 1 mm.

The invention is not limited thereto. Instead of roughly profiled primary air nozzles 36, it is also possible to use rectangular, triangular or otherwise profiled primary air nozzle cross sections.

It is important that the primary air flow supplied by the primary air in the direction of arrow 51 into the nozzle channel 25 has a temperature in the range between 10 ° C. and 12 ° C., for example, and is therefore cooled or at least tempered. The primary air stream discharged via the primary air nozzles 36 is emitted in a vertically downwardly directed, pointed core zone 37 in the direction of the upper side of the lower ceiling 31. The waveforms in Figure 4 show the velocity profile of the mixing air flow, which is formed from the primary air stream 40 with the sucked into ceiling cavity 30 secondary air stream 33.

By the forced blowing out of the primary air from the primary air nozzles 36 and by the direction of the primary air flow 40 against the arranged in the lower ceiling 31 Zuluftöffnungen 41 there is an air parison effect.

In a preferred embodiment, the supply air openings 41 are formed as air diffuser. The conically narrowing profile 44 of the air diffuser formed as air inlet openings 41 is formed by a first, approximately horizontal leg 45 which merges at an angle in a subsequent oblique leg 46, which in turn merges into a vertical leg 47. As a result, a conically narrowing profile of the diffuser 43 is formed, which narrows from the inflow opening in the direction of the outflow opening. This results in a Nachsaugeffekt for the room air flow 32, which is sucked through leaks in the lower ceiling 31 in the ceiling cavity 30.

As a result, the room air flow 32 is sucked into the ceiling cavity 30 and admixed as a secondary air flow 33 in the region of a mixing zone 38 to the primary air flow 40. The mixing zone 38 is preferably formed conically widening and is formed by two mutually angularly arranged lines 39, wherein about the lines 39 should meet the oblique leg 46 of the inlet openings 41 designed as a diffuser 43.

This results in an optimum suction-suction effect of the secondary air flow 33 and an admixture in the primary air flow 40 in the region of the mixing zone 38.

Instead of the formation of Zuluftöffnungen 41 in the lower ceiling 31 as a diffuser 43, other cross-sectional shapes are provided.

The diffuser 43 is not a nozzle after it comes to a reduction in the air velocity and the air should flow as evenly as possible and low turbulence in the space 4. It is therefore a virtually turbulence-free mixing ventilation.

Instead of the conical narrowing shape of the diffuser shown here, other shapes are conceivable.

The cross section of the diffuser 43 may also be formed purely cylindrical, and the diffuser 43 in the embodiment shown is formed with the profile 45 as a slot opening, as shown.

Instead of a slot opening can - as stated later - also other diffuser lengths and cross sections are selected.

FIG. 5 shows the size ratio of the nozzle cross sections of the primary air nozzles 36 in comparison to the cross section of the inlet air slots 42, which are designed as a diffuser 43.

Here, a size ratio of about 1: 100 is used. It also follows that no nozzle-like effect takes place in the diffuser 43 (supply air slot 42). Further, Figure 5 shows that there are 42 piecewise air-impermeable interruption parts 49 between the Zuluftschlitzen through which no air flows through. FIG. 6 schematically shows the arrangement according to FIGS. 4 and 5 in perspective view. Here it can be seen that starting from the distributor tube 20, 21, the primary air is introduced in the direction of arrow 19 in the parallel to the longitudinal direction of the ceiling panels 8, 9 extending nozzle channel 25, and there in the direction of arrow 51 along and flows there from the bottom of the nozzle channel 25th arranged primary air nozzles 36 flows out. This takes place in the form of the primary air flow 40, which has the velocity profile 35 according to FIG.

The primary air flow 40 forms a mixing zone 38 into which the secondary air flow 33 is sucked. The secondary air flow 33 comes from the room air stream 36, which is sucked in by the leaks, for example the distance joints 10 in FIG.

In the illustrated embodiment, the transverse joints 11 are impermeable to air.

In another, not shown embodiment, however, it may also be provided that the longitudinally extending spacer joints 10 are impermeable to air and the transverse joints 11 are formed permeable to air. Furthermore, it can be seen from FIG. 6 that the room air is sucked in through the supply air openings 41 interrupting the lower ceiling 31, the supply air openings being designed as supply air slots 42 in the exemplary embodiment shown. They have air-impermeable interruption parts 49, which are material-closed so as to obtain the ceiling plate 8 in its integrity and flexural strength.

The distance 58 between the nozzle channel 25 and the parallel Zuluftschlitz 42 can be changed within wide limits. So can the the Lower ceiling 31 extending supply air slot 42 extend approximately in the middle or at one-third or two-thirds of the width of the ceiling plate 8.

It is important in any case that the nozzle channel 25 is aligned over the arranged in the lower ceiling 31 Zuluftschlitze 42, as shown in Figure 4, to achieve a centric and targeted air intake of the primary air flow in the direction of the air diffuser 43 in the lower ceiling to the ceiling cavity 30th to achieve the mixing of a secondary air flow 33 to the primary air flow 40.

As a modification, FIG. 7 shows that not only supply air slots 42 can be present in the lower ceiling 41. Instead, instead of the Zuluftschlitze 42 also deviating from the slot shape supply air openings 41a may be arranged, which are profiled in the illustrated embodiment, oval or round and occupy a mutual distance from each other.

The primary air flow 40 is directed specifically into the supply air openings 41, 41 a.

The supply air openings 41, 41a need not only be laid in a line parallel to the side boundaries of the respective ceiling panel 8, 9. They can also be aligned along an alignment guideline 52, 52a, 52b, which extends antiparallel to the longitudinal side of the respective ceiling panel 8, 9. The alignment lines 52 may also form a particular alignment angle 53 to each other.

In the exemplary embodiment it is shown that the room air 32 is sucked in at the open gap joints 10.

The invention is not limited thereto.

FIG. 7 d also shows that the room air 32 can be sucked in at the - then open - transverse joints 11. FIG. 7a shows that, instead of the round or oval inlet air openings 41, 41a, rectangular inlet air openings 41b can also be provided. FIG. 7b shows that the supply air openings 41c can also be profiled triangular or otherwise.

FIG. 7c shows that arbitrarily profiled supply air openings 41, 41a, 41b, 41c, 41d can also run along an arcuate alignment guideline 52c, provided that (in all exemplary embodiments) the nozzle channel 25 also follows this alignment guideline 52c and is aligned therewith.

FIG. 7 e shows various embodiments of how room air from the room air flow 32 can be sucked into the ceiling cavity 30 at the top of the ceiling panels 8. In the left part of FIG. 7e it is shown that the room air is sucked in via air-tight open transverse joints 11 between the ceiling panels 8, 9. Furthermore, it is shown that the supply air openings 41 are formed as supply air slots 42. The middle part of Figure 7e shows that the ceiling panels 8, 9 can also connect completely close to each other, and no air-tight opening is present, with the exception of the ceiling panels 8, 9 by breaking ceiling panels 59, which can be profiled in any way and through which the room air is sucked in as room air flow 32b.

Furthermore, it can be seen from FIG. 7e-from the left-hand illustration-that the ceiling panels 8, 9 can connect to each other completely air-tight both longitudinally and transversely, and only one air space is provided on the room-side connection side 61. The wall connection side 61 can thus be open to the air, and the room air 32 can be sucked in only on the wall connection sides of the entire lower ceiling 31. The air-permeable wall connection side 61 may be provided either on the narrow side or on the broad side of the lower ceiling 31, or the air-tight opening of the lower ceiling may be provided circumferentially on all wall connection sides 61. Such air-open wall connection sides 61 are shown for example in FIG.

FIG. 8 shows a modified embodiment with respect to FIGS. 1 to 7, which differs from the abovementioned exemplary embodiments only by the temperature control in the floor slab 26. In this Betonkerntemperierung 26 tempering tubes 54 are laid in the floor ceiling, which provide cooling or heating of the floor ceiling 26.

This has the advantage that, for example, in the night, when the room 4 is not occupied, the floor slab 26 can be tempered on the tempering tubes 54, and the mixed air flow generated in the ceiling cavity 30 still flows along the underside of the floor slab 26, there is tempered and mixed air stream (secondary air stream 33) is mixed with the air mixed with the primary air stream 40 and flows as a tertiary air stream 34 into the room with the velocity profile shown in Figure 8.

The advantage of this measure is that during the night hours, the floor ceiling 26 is tempered and the temperature during daytime operation is no longer necessary. Another advantage is that the temperature control circuit 56 is designed to be controllable with the main pipes 55, so that any temperature control of the floor slab 26 can take place during the day or night. FIG. 9 shows the top view of the arrangement according to FIG. 8, where it can be seen that a multiplicity of temperature control tubes 54 are arranged in the floor slab 26 and the surface of the temperature control tubes 54 extends over the entire area of the room. FIG. 10 shows, as a further modification to FIG. 8, that instead of controlling the temperature of the floor slab 26, there is a temperature control of the lower ceiling 31, on or in which a number of temperature control registers 57 are laid, so that the lower ceiling 31 can be cooled or heated as desired. This is done by a controllable temperature control circuit.

The advantage of the arrangement according to FIG. 10 is that it is possible to dispense with a concrete core tempering with a temperature control installed in the floor slab 26, because a bottom layer 26a (underside or room side) of the solidly built floor slab 26 is additionally tempered by the temperature control of the lower ceiling 31 other temperature than, for example, the top of the false ceiling.

Thus, the bottom 26a of the floor slab 26 is also used for temperature control of the ceiling cavity 30, so that the resulting from the room air flow 32 secondary air flow 33 is brought to the additional tempered bottom 26a of the floor slab 26, where it is further cooled or heated, and then finally as secondary air flow 33rd the primary air stream 40 is added and is guided as a tertiary air flow 34 back into the room. FIG. 11 shows the embodiment of the arrangement according to FIG. 10, where it can be seen that the temperature registers 57 occupy only a part of the room area, for example only 40% of the floor area of the room 4. Advantage of the method according to the invention and the device operating with the method in that a tension-free and turbulence-free tempering of rooms can take place with substantially lower tempering expenditure and lower energy input, because the actual mixing processes between a primary air stream and a secondary air stream take place in the ceiling cavity 30 separated from the room above a lower ceiling 3.

Thus, all rooms can be independently regulated depending on the load, because the variable volume flow of the primary air flow is the dominant tempering, which can be easily determined by a control on the flow controller.

This also results in high cooling performance, because large exchange surfaces are given after at least the bottom 26a of the floor slab 26 or the entire floor slab 26 itself or all surrounding surfaces that define the ceiling cavity 30, are used as heat exchange surfaces. This was not the case with the prior art.

For the sake of simpler description, the parts provided with reference numerals are not additionally denoted by their lower case letters a, b, c, d in the following claims, although the parts thus designated also belong to the scope of protection of the claims. drawing Legend

1 hallway

 2 corridor partition

 3 door element

 4 room

 5 partitions

 6 windows

 7 facade support

 8 ceiling slab (longitudinal slit)

 9 ceiling plate (without slot)

 10 gap joint (open)

 11 transverse joint

 12 air distribution system

 13 outlet pipe

 14 arrow direction

 15 main channel

 16 volumetric flow controllers

 17 silencers

 18 supply air pipe

 19 arrow direction

 20 distribution pipe

 21 distribution pipe

 22 cross tube

 23 connecting pieces

 24 soffit cover

 25 nozzle channel 25a, b, c, d

 26 storey ceiling 26a underside

 27 room floor

 28 cavity

 29 storey ceiling

30 ceiling cavity 31 false ceiling

 32 room air flow 32b

 33 secondary air flow

 34 tertiary airflow

 35 speed profile a, b, c

 36 primary air nozzles (in 25)

 37 core zone (out of 40)

 38 mixing zone

 39 line

 40 primary air flow

 41 supply air opening

 42 supply air slot

 43 diffuser

 44 profile

 45 thighs

 46 thighs

 47 thighs

 48 angles (from 39)

 49 interruption part

 50

 51 arrow direction

 52 DIRECTIVE A, B, C

 53 alignment angle

 54 tempering tube

 55 main pipe

 56 temperature control circuit

 57 temperature register

 58 distance

 59 ceiling plate opening

 60 tempering air flow (from 33) 60a

 Wall connection side

Claims

claims 1. A method for ventilation and temperature control of rooms on the principle of dilution ventilation, wherein a primary air flow (40) in the ceiling cavity (30) of a room (4) is initiated, which is divided by a false ceiling (31) of the floor slab (26) and via leaks (41, 42, 43) in the lower ceiling (31) in the space (4) is introduced, characterized in that the primary air flow (40) in the ceiling cavity (30) as the induction air flow generates a secondary air flow (33), which Room air stream (32) from the space (4) in the ceiling cavity (30) sucks, mixed with the secondary air flow (33) and as tertiary air flow (34) through the leaks (41, 42, 43) in the lower ceiling (31) in the room (4). 2. The method according to claim 1, characterized in that the primary air flow (40) as an induction air flow targeted against the leaks (41, 42, 43) in the lower ceiling (31) is directed and the secondary air stream (33) nachsaugenden the room air (32). 3. The method according to claim 1 or 2, characterized in that the leaks in the lower ceiling (31) as Zuluftöffnungen (41, 42, 43) are formed. 4. A device for ventilation and temperature control of rooms on the principle of dilution ventilation, wherein a primary air flow (40) in the ceiling cavity (30) of a room (4) can be introduced, which is divided by a lower ceiling (31) of the floor slab (26) and via leaks (41, 42, 43) in the lower ceiling (31) in the space (4) can be introduced, characterized in that in the ceiling cavity (31) at least one primary air flow (40) leading nozzle channel (25) is arranged over arranged on the underside primary air nozzles (36) directed a targeted against the unterdeckenseitigen air inlet openings (41, 42, 43) directed primary air flow (40). 5. Apparatus according to claim 4, characterized in that the Primary air flow in the ceiling cavity (30) as induction air flow generated a secondary air flow (33), which sucks a room air flow (32) from the space (4) through leaks in the lower ceiling (31) in the ceiling cavity (30), mixed with the secondary air flow (33) and via leaks (41, 42, 43) in the lower ceiling (31) in the space (4) brings. 6. Apparatus according to claim 4 or 5, characterized in that at least some of the air-conducting leaks in the lower ceiling (31) are formed as a diffuser (43). 7. Apparatus according to claim 6, characterized in that the diffuser (43) consists of an inflow side arranged cone part, which merges into a downstream arranged cylinder part. 8. Device according to one of claims 4 to 7, characterized in that the primary air as a free emitter in the form of a pointed core zone (37) at high speed from the primary air nozzles (36) of the nozzle channel (25) flows out, and in alignment with the underside air inlet openings (41). 9. Device according to one of claims 4 to 8, characterized in that the lower ceiling (31) and / or the floor slab (29) is tempered / are. 0. Device according to one of claims 4 to 9, characterized in that the air-carrying leaks in the lower ceiling (31) through which the room air flow (32) is sucked into the ceiling cavity (30), as spacing joints (10) between ceiling panels (8 , 9) of the lower ceiling are formed.