FR2471559A1 - AERATOR-SHAPED DEVICE FOR AERATION WITH HEAT DELIVERY AND DESALLATION OF PREMISES, ESPECIALLY ROOM-SHAPED ROOM WITH HIGH GROUND SURFACE AND / OR HIGH HEIGHT - Google Patents

Abstract

THE PRESENT INVENTION CONCERNS A VENTILATOR-SHAPED DEVICE FOR AERATION WITH THE SUPPLY OF HEAT AND DESAERATION OF PREMISES, IN PARTICULAR AREAS IN THE FORM OF A ROOM WITH A LARGE GROUND SURFACE OR LARGE HEIGHT. DEVICE CHARACTERIZED BY THE FACT THAT THE HEAT RECOVERY PART INCLUDES, ON THE ONE HAND, AT LEAST ONE PIPE OR PLATE EXCHANGER 1 BROUGHT BY ONE OF THE TWO AIR CURRENTS 6A, 6B IN RADIAL DIRECTION RELATING TO THE FAN A EXHAUST AIR 4 AND THROUGH THE OTHER AIR CURRENT IN AXIAL DIRECTION 5, AND, ON THE OTHER HAND, FAN 4, GENERATING, FOR EXAMPLE, AXIAL AIR CURRENT 5 AND ARRANGED BETWEEN A ROOF BASE 2 SERVING TO FIX THE DEVICE TO THE ROOF 3 OF THE ROOM AND THE INPUT INTENDED FOR THE AXIAL AIR CURRENT 7A, 7B COMING FROM THE ATMOSPHERE OR THE OUTLET INTENDED FOR THE AXIAL AIR CURRENT 11A, 11B GOING TO THE ATMOSPHERE.

Description

The invention relates to an aerator-shaped device for aeration

  with heat supply and deaeration of premises, in particular rooms with a large surface area on the ground and / or high, having an air path equipped with a fan for the exhaust air flow and an air path for the intake air stream, as well as a heat recovery section providing a heat exchange between the exhaust air stream and the stream

intake air.

  For the deaeration of large premises such as editing rooms, warehouses, workshops, shops, etc., we use aerators that aspire from the room to deaerate the air used but still more or less hot and push back into the room. 'atmosphere. However, relatively large losses of enthalpy occur which are undesirable and should be avoided as much as possible, especially in terms of energy saving. That is why we have also proposed large ventilation systems in which we use what is called regenerators or recuperators to transmit

  to the intake air the enthalpy contained in the exhaust air

  is lying. However, these large known aeration installations require significant manufacturing costs. In addition, the known arrangements are complete devices which

  have intake and exhaust air fans

  and heat exchangers, gathered in a group.

  In addition to the high purchase price, a disadvantage of these

  known is that, when applied, it is not possible to convert existing installations, that they lack flexibility and variability, thus the possibility of adaptation to the different conditions of local and service and that each installation can only be sold under

  overall shape. The invention aims to remedy this.

  This is why the invention aims to provide a

  device of the species considered here which is formed of

  subgroups each used separately, which can be

  assembled in the manner of a construction game according to the cir-

  constancies and requirements, the device including, for example, a heat exchanger that can be combined with roof bases and roof fans so as to obtain

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  a roof fan with heat recovery.

  The above problem is solved, according to the invention, thanks to the fact that the heat recovery part comprises, on the one hand, at least one tube or plate heat exchanger traversed by one of the two air currents. radially relative to the exhaust air fan and the other air stream in the axial direction, or, for example, two

  heat exchangers of this type connected in series, in the

  the intake air stream is, for example radially introduced and of which the intake air stream is, for example, withdrawn axially, while the exhaust air is led outwardly axially through the plate heat exchanger and also axially out of the device, and on the other hand, the fan, generating, for example, the axial air flow and disposed between a roof base for fixing the device to the roof of the room and the entry for

  axial air flow from the atmosphere or the exit

  born in the axial air stream going to the atmosphere.

  The advantage of the arrangement according to the invention is that it is possible, after the fact and without large means of construction,

  to convert existing ventilation systems into an

  heat recovery plant, mounting the heat exchanger between the roof fan and the roof base. But

  above all, the invention is distinguished by a cost price of

  less, because of its ability to adapt to all possible conditions and also to the fact that each of the components can be sold and installed separately, so that stock-keeping at the manufacturer's premises is simplified. The new arrangement requires supportable means for a reasonable yield, it is distinguished by a use as good as possible of the volume of construction (plate heat exchanger), the necessary breakthrough in the ceiling for the installation of the device is extremely small, l intake air and exhaust air can hardly

  mix between them, the two currents are absolutely separated

  Res, the handling is simple, the losses of load are minimal

  males. This results in anyway a simple device that can be delivered in the complete state or by separate components and has an extremely good performance in comparison

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  of the cost price at the same time as a good possibility

  adaptation and good flexibility.

  According to the invention, it is still a matter of organizing the construction-like design so that the parts can be easily dismantled and assembled and easily manipulated. Indeed, it has emerged that the cleaning often necessary heat exchangers of the kind considered here is complicated and expensive. However, we can not do without this cleaning. Indeed, the quality of a heat exchanger, as regards the heat recovery, depends essentially on the exchange surface which participates in the heat exchange and the residence time of the fluid inside the heat exchanger so that from this point of view, it is necessary to aim at a large exchange surface. However, since at the same time a construction as compact as possible is required, such a large exchange surface means that very small interstices must be provided between the heat exchange surfaces and that it is necessary to try

  to obtain a relatively large weight per unit volume.

  However, since air intake is often

  poured the heat exchanger is not pure, but contains dust, the elements and heat exchange assemblies become clogged easily, especially as the gaps between the heat exchange surfaces are kept small for the reasons above. Such fouling would result in a significant decrease in the efficiency of the device. Therefore, it is necessary to think from time to time to restore the elements and sets of heat exchange but it is very difficult to clean large elements especially as -30 ica fans are placed on the roof and that often they are very poorly accessible. For all these reasons, the object of the invention is also to take measures such that the part to be cleaned can be easily broken down into separate elements.

  easy to handle and therefore easy to clean.

  To solve this problem, the invention proposes a device

  characterized in that the heat recovery portion comprises a plurality of, for example two, three, four or six heat exchanger assemblies each constituting a separate body, operating, for example, according to the principle of cross currents, having a shape prismatic, for example in the form of heat exchangers plate or tube, diametrically opposed or arranged in a star, in that the heat recovery portion further comprises a core containing a portion of the air path and constituting a carrier part, for example with hexagonal contour, disposed at the center of the entire device and at the same height

  that heat exchanger assemblies and to which

  cord down the intake air tube, preferably coaxial, and in that the heat exchanger assemblies are removably disposed on a carrier portion of the device

  which may include, for example, the heart.

  The advantage of such an arrangement according to the invention is that it can be carried out easily cleaning and therefore also improve the performance of the entire layout, without significant resources: we can easily remove the sets of heat exchange of the heart which forms the actual carrier part of the entire device or add them to this heart and, in addition, they have such a size that we can easily remove them and remove them from the roof, after which we can clean them in a suitable place, for example with compressed air or running water. It results

  as well as according to the desired power, one can foresee a

  More or less large number of heat exchange assemblies, for example one can, according to the requirements of practice, connect a single kind of core, for example with a hexagonal contour, to a variable number of heat exchange assemblies. for example two, three, four or six of these sets, and use them as well. Thus, on the one hand, manufacturing, and on the other hand, the maintenance of stocks are simpler and one can also adapt, as simply as possible, to all possible circumstances. Examples of embodiment of the subject of the invention are represented by the drawings, in which: FIG. 1 shows a first embodiment of the object of the invention in schematic side elevation; FIG. 2 is a view similar to FIG. 1, showing part of a variant of this arrangement; FIG. 3 is a diagrammatic side elevation view of FIG.

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  section showing another variant of the subject of the invention

  Figure 4 shows in schematic side elevation

  FIG. 5 is a diagrammatic plan view of the arrangement of FIG. 4, in sectional view of another embodiment of the object of the invention; FIG. 6 is a schematic plan view of a variant of

  the arrangement of Figure 5 (two heat exchange

  nomic); FIGS. 7 and 8 are views similar to FIG. 6, showing two other variants of the arrangements of the figure and of FIG. 6 (three and four heat exchange assemblies),

  FIG. 9 is a diagrammatic side elevation view of

  partly in section of another variant of the object of the invention.

  tion; Fig. 10 is a schematic plan view of the arrangement of Fig. 9; Fig. 11 is a side elevational view, partly in section and schematic, of another variation of the subject of the invention, and Fig. 12 is a schematic plan view of the layout

of Figure 11.

  Each of the illustrated embodiments of the invention constitutes an aerator-shaped device for aeration with heat supply and the deaeration of large rooms, comprising an air path with a corresponding fan for the air flow. exhaust and an air path for

  the intake air stream, as well as a recovery part

  heat exchange for heat exchange between the exhaust air stream and the intake air stream and one of the two radially directed air currents to the exhaust air fan and the another air stream in the axial direction, which is arranged between the roof base for fixing the device to the roof of the room to be ventilated and deaerated and the inlet for the axial air stream coming from the atmosphere

  or the exit for the axial air stream going to the

  phere. In the embodiment shown in FIG.

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  the annular plate heat exchanger 1 is disposed between the roof base 2 disposed at the ceiling 3 of the room to be ventilated and deaerated and the fan, indicated at 4, generating the axial air stream 5.- In this mode of execution, the intake air stream is introduced radially according to the arrows 6a, 6b in the plate heat exchanger, removed from it axially according to the arrows 7a, 7b and then following the arrows 8a, 8b and introduced into the room to deaerate and ventilate, while the exhaust air is sucked, following the arrows 9a, 9b, out of the ceiling region of the room 10 and brought from the device to the outside, approximately axially, according to the arrows 11a, 11b, through the plate heat exchanger and also exits axially according to the

  arrows 5. This arrangement shown in Figure 1 includes

  the two fans: a fan 4 for conveying the exhaust air stream and a fan 12 for conveying the intake air stream, the two fans being arranged coaxially and being in the form of radial fans in the illustrated execution example. It can be seen from the drawings that the roof base 2 is approximately in the center of the device and carries, at its upper side opposite the ceiling, the annular plate heat exchanger having radial inlets for the air of intake according to the arrows 6a and in turn bearing, at its opposite side to the roof base, the casing 4 of the exhaust air fan, with the axial exhaust air outlets according to the arrow 5,

  the central part of the exchanger carrying the air outlet of ad-

  mission 13, directed axially and in the opposite direction to the air of

  exhaust and opening into an intake air tube 15, coaxially passing through the passage of roof base 14, penetrating by its lower end into the room to ventilate and deaerate

  and which, in the exemplary embodiment represented, bears to its ex-

  lower tremit the intake air fan 12 with its housing. Instead, the intake air tube can communicate at its lower end with channel members for driving the intake air thereafter, the intake air tube can also communicate at its lower end with a ceiling air heater that assumes the post-heating function, the intake air blower 12 then being removed, since the ceiling air heater itself has a blower. In this embodiment according to FIG. 1, the exhaust air is sucked

freely from the ceiling area.

  We can also adopt a provision like the one

  Figure 2 shows only a slight change in

  tion of the embodiment of Figure 1: here, the roof base is indicated in 2a, the ceiling of the room to

  deaerate and aerate at 3a, the guide tube 15a has been designated

  which can carry the intake air fan at its lower end or communicate with channel elements or with ceiling air heating, as has already been

  indicated. This part is not represented here anymore.

  In the variant according to FIG. 2, however, the exhaust air

  is no longer drawn freely from the ceiling area

  but through a collector box 16 with branch

  channel 17, the exhaust air being in this case sucked below the ceiling of the room and leads, this collector box, by channels, the passage 17 through the base

  and leading to the annular plate heat exchanger.

  In the variant of Figure 3, there are two samples

  series-connected thermal heaters 20, 21, one of which is above the ceiling 22, between the roof base 23 and the intake air inlet 24, while the other heat exchanger, the bottom, is below the ceiling 22 of the room. The exhaust air fan 25 is here arranged between the two plate heat exchangers. The arrangement is such that the heat exchanger 20 located above the ceiling also

  although the exchanger 21 located below the ceiling are

  run radially by the exhaust air and axially by the intake air, the exhaust air entering the exchanger

  lower thermal path along the arrows 26 and coming out of the

  upper changer following the arrows 27, while the intake air, which passes from the upper heat exchanger to the lower heat exchanger by an annular chamber 30 o is located

  the exhaust fan housing, enters the

  top changer following the arrows 28 and exits the

  According to the drawing, in this mode of circulation, intake and exhaust air currents, the intake air, can be seen from the upper heat exchanger to the lower one. lower exchanger, is in heat exchange with the exhaust air that passes through the exhaust fan. The intake air fan may be located above the upper heat exchanger, but it may also be below the lower heat exchanger. In all cases, above the roof base 23 mounted on the ceiling 22 of the room to be ventilated and deaerated is disposed the upper heat exchanger 20,

  1o above which is the entry 24 for the air of ad-

  while the central region of the device is

  it to the roof base and comprises in the annular chamber 30 the exhaust air fan 25, and the lower region of the device comprises the lower heat exchanger 21 and the exhaust air 31 intake. The annular chamber of the upper heat exchanger, the fan housing

  exhaust air and the annular chamber of the heat exchanger

  lower level, as well as possibly entry and exit

  air intake, are arranged coaxially, they form

  seems to be the central part of the device which is

  the exhaust air along the arrows 32, 33,

  while the peripheral part surrounding this central part

  essentially, the annular chamber 30 with the two plate heat exchangers 20, 21 is essentially

crossed by the intake air.

  On the one hand, it can be seen from the overall concept of

  the device according to the invention, and, secondly, according to the mode of representation chosen, that the different elements

  of the device are connected together in a detachable and

  appeared in a set composed in the manner of a construction game.

  some of these elements being in the form of standard

  and can be sold and used in isolation. This assembly mode in which the whole assembly is formed of several parts allows, in addition, according to the circumstances and needs, to make variants composed in any way with the same elements. In the arrangement of Figure 3, all parts of the device are collected in a little together

  bulky, in a housing like a cube.

  The arrangement of FIGS. 4 and 5 has an air path along the arrows 101, with an auxiliary fan 102 for the exhaust air flow and an air path along the arrows 103 for the intake air flow. in addition, it comprises a heat recovery part designated by the general reference 104 and providing a heat exchange between the exhaust air stream 101 and the intake air stream 103. This heat recovery part comprises a heat exchange arrangement and an intake air tube 105, which passes through the lower part of the device with a central arrangement, passes through the roof base 106 and penetrates, through its lower end, into the room to be ventilated and deaerate 107, closed at the top by

the ceiling 108.

  The heat recovery portion 104 has a plurality of

  a plurality of prismatic heat exchanger assemblies, each constituting a separate body. In the embodiment of FIGS. 4 and 5, the heat recovery portion 104 comprises six heat exchanger assemblies 109a, 109b, 109c, 109d, 109e, 109f, themselves formed of two parts, the part

  thermal exchange itself 110 and a conductive part

  trice of air llla, lllb, lllc. The actual heat exchange part 110 has the shape of a cube and the whole of the arrangement 110, 111a, 111b, 111c has dimensions such that it can be handled easily: the heat exchangers can be easily dismantled and removed from the roof, they can then be transported to a suitable place to clean them, for example with compressed air or running water. The

  air-conductive part of each heat exchanger assembly

  3 is a trapezoidal contour in lateral elevation and FIG. 5 shows a rectangular contour in the plane. It can be seen from FIG. 4 that these three bodies llla, lllb, lllc are each open in the direction of admission or exhaust, hence the funnel or

  hood 112b 112b, the funnel or hood lllc 112c and the

  funnel or hood llla in 112a. On the opposite side and on both longitudinal sides, these funnel-shaped bodies or hoods are closed, the trapezium widening towards the open side. Of

  preferably, the heat exchanger assemblies of the device

  described above are of the type which operates on the principle of cross currents, they can be in the form of plate exchangers as in the examples of execution

  represented but also in the form of tube exchangers.

  The heat recovery portion further includes a central core 113 disposed at the center of the assembly of the device and at about the same height as the heat exchanger assemblies 109a-109f and which, as can be seen particularly in Figure 4, has a portion of the air path and is a carrier part. In the embodiment shown in Figures 4 and 5, as in the other variants shown, the heart, seen in plan has * a hexagonal outline but of course, it can also have another shape. The heart is arranged on the roof base 106

  (see Figure 1) on which it is placed.

  The heat exchanger assemblies 109a to 109f are

  detachably arranged on a carrier part of the device

  tif, in the examples-represented this carrier part is formed by the heart itself. Heat exchangers are

  arranged, on this carrier part or heart, in a diametrically

  opposite or star-shaped. For this purpose, in the embodiments shown, the heat exchanger assemblies are each placed flat, by one of their lateral faces, for example the lateral face 114a of FIG. 5, against an outer surface 114b. heart, corresponding to one of the sides of the hexagonal outline of the heart. The heat exchanger assemblies can each be detachably disposed on the core, by means of a quick coupling but of course, another connection can also be used. In addition, in the arrangement adopted, the bodies in the form of a funnel or hood llla, lllb, lllc are each added to the cube 110 of the corresponding heat exchange part, by a side 110a opposite the heart and by the sides facing the exhaust air outlet llOb and the inlet air inlet llOc, the core having, at each side facing the open sides of the funnel-shaped bodies, an air channel 112d , 112e connected to this side and communicate, on the opposite side, with

  the flow of the exhaust or intake air stream.

  As mentioned above, the same core or a core made in the same way, preferably coaxially connected to the intake air tube 105, passing through the roof base 106, and to the exhaust air head 115, can be deputy

  to a variable number of heat exchanger assemblies and -

  also with a different layout. In the embodiment of FIG. 6, the device comprises two sets

  heat exchanger 120, 121 contiguous, in a diametrical position

  opposite, with two lateral faces 120a and 120b of the core 122 with a hexagonal contour. In the arrangement of FIG. 7, there are three sets of heat exchangers 123, 124, 125 in the middle with hexagonal contour 126 by three lateral faces 123a, 124a, 125a situated at 120 from one another. the

  Figure 8 consists of four sets of samples

  Thermal generator 127, 128, 129, 130 arranged in groups of two -the group 127, 130 and the group 128, 129- and the two sets of exchanger of each group -so the sets 127 and 130 on one side and 128 , 129 on the other side- are attached to side faces 127a, 130a on one side, 128a, 129a on the other side, the hexagonal portion 131. Between the two groups of two 127, 130 and 128 129, a side face 131a, 131b of the heart is unoccupied on each side. In the case

  of six heat exchanger assemblies, the device is

  FIG. 5. It can be seen from FIG. 4 that the exhaust air stream first passes through the passage 116 of the roof base, which after having been deflected two

  900 times, it passes axially through the heat exchange part.

  corresponding 110 of the heat exchanger assembly, in the direction of the exhaust air head, along the arrow 10a and then, after being deflected again twice 900, it goes back to the outside in the axial direction along the arrow 101b, through the exhaust air head, while the intake air stream crosses radially along the arrow 103a the heat exchange portion 110 of

  the heat exchanger assembly and flows then, after deviation

  900, to the inlet air tube 105 to be introduced

then in the room to ventilate.

  In the embodiment of FIGS. 9 and 10, it is possible to increase doubling - the effect of the exchangers. For this purpose, the heat recovery portion 140 comprises two

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  groups 143, 144 of heat exchanger assemblies, connected in series in the direction of flow according to the arrows 141 and 142 and geometrically superimposed, which, as in the embodiments described above, may comprise, for example, two, three, four or six sets of heat exchanger. The corresponding sets of the two groups, for example the sets 143a of the group 143 and the set 144a of the group 144, are connected in series. The core 145 is two-staged, it has a double axial dimension corresponding to the height of two superimposed assemblies, as shown in FIG. 9. FIG. 10 shows an embodiment comprising,

  for each of the two groups 143, 144, four sets of

  heat changer 143a, 143b, 143c, 143d and 144a, 144b, 144c, 144d. The heart is indicated in 142; it has a height double that of the arrangement of Figure 4, for example the intake air opening 146 extends only over a portion of the height of the heart, it can be seen that this inlet opening of air intake-146 is this time provided on the heart and that in the example shown, it extends only half of the height of the heart but over its entire width. The heat exchanger assemblies connected in series are successively traversed by the exhaust air stream.

  axially, along the arrows 141a and 141b and furthermore, the exhaust air stream undergoes about the same deviations as in the arrangements described above. The intake air stream passes successively

  in the radial direction along the arrows 142a and 142b the

  series of heat exchangers 143a and 144a connected in series and the intake air stream, after leaving the first set of heat exchanger and before entering the second set of heat exchanger 144a, undergoes two deviations, for example in regions 142c and 142d. In this case, the openings of funnel-shaped bodies or hoods 147, 148 facing away from the intake air tube are rotated towards each other as indicated at 147a and 148a and

they are connected to each other.

  Figures 11 and 12 show another embodiment of the object of the invention wherein, if, for example, in hot weather, it is desired to cool the room, it does not pass

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  the intake air through the exchanger elements so that it does not borrow heat from the exhaust air. Here again,

  there are two sets of heat exchanger 150, 151 super-

  placed or connected in series, for example made and arranged relatively as shown in Figure 9, again, the heart 152 is in two stages, its height h is twice as large as in the variants of Figures 4 to 8, described above, the inlet air opening has the width b of the core,

  but its height is only half of that of the heart.

  This intake air opening 153 allows the air to enter the arrows 154 and then, without making the detour by the heat exchanger assemblies, it is brought directly to the exhaust opening 155 at the end of the tube. The exhaust air path, as in the embodiment of FIGS. 9 and 10, passes axially through the two sets of heat exchangers 150, 151 according to the arrows 15. switching elements such

  distributors or the like, not specially represented

  the intake air coming from the inlet opening before it arrives

  heat exchanger assemblies and introduce it directly

  in the intake air tube. In such a case, the air

  intake does not take heat from the exhaust air.

  is lying; it is naturally possible to apply again, for example in winter, the cross-flow process and to psser the intake air next to the exhaust air, by

  example as in the arrangement according to Figures 9 and 10.

  In the case where the intake air is brought directly to the outlet opening, it is possible to take the heat contained in the exhaust air and

  to dissipate in order to take advantage of it in another way.

Claims (17)

-R E V E N D I C AT IO N S-   1. Device in the form of an aerator for aeration   with heat input and the deaeration of premises, in particular   connecting premises in the form of a large-area room on the ground and / or high, comprising an air path equipped with a fan for the exhaust air stream and an air path for the current of intake air ', as well as a heat recovery part providing a heat exchange between the exhaust air stream and the intake air stream,   characterized by the fact that the recovery part   heat supply comprises, on the one hand, at least one tube or plate exchanger (1) traversed by one of the two air currents (6a, 6b) radially relative to the exhaust air fan ( 4) and by the other air stream in the direction   (5), or, for example, two heat exchangers   theirs connected in series, in which the current   intake air (6a, 6b) is, for example, introduced radially.   the intake air stream (7a, 7b) is, for example, withdrawn axially, while the exhaust air (9a, 7b,   9b) is driven outward axially through the sample.   thermal generator plates (1) and also axially out of the device, and, secondly, the fan (4), generating, for example, the axial air stream (5) and disposed between a roof base (2 ) for fixing the device to the roof (3) of the room and the inlet for the axial air stream (7a, 7b) coming from the atmosphere or the outlet for the axial air stream   (lla, llb) going to the atmosphere.   2. Device according to claim 1, characterized in that it comprises a fan (4), for example in the form of a radial fan, for conveying the exhaust air stream (5) is a fan (12), for example in the form of a radial fan, for conveying the intake air stream (7a, 7b) and that the two fans are arranged coaxially.   3. Device according to claim 2, characterized in that the roof base (2) disposed on the ceiling (3) of the local to   ventilate and deaerate is at about the center of   tif and carries, on its upper side opposite the ceiling, the   annular plate thermal generator (1) provided with radial inlets for intake air (6a), in turn bearing the opposite side   at the roof base the fan housing (4) with exhaust air   with the axially aligned outlets for the exhaust air (5) and the central part of which carries the axially directed outlet in the opposite direction to the exhaust air, intended for intake air and opens in an intake air conductive tube coaxially passing through the passage of the roof base (2) and penetrating at its lower end into the room to be ventilated and deaerated and which may, for example, carry at its lower end an air fan inlet (12) with its housing and / or communicate with channel elements for further guiding the intake air (8a, 8b) and / or communicating with a ceiling air heater which assumes the post-heating function and / or aspiring   freely exhaust air (9a, 9b) from the ceiling region.   4. Device according to claim 3, characterized   in that the exhaust air is sucked into a collector box   reader (16) below the ceiling (3a) of the room to be aerated or deaerated and is led from this box, by channels, to   passing through the roof base (2a) and leading to the exchange   annular heat generator with plates.   5. Device according to claim 1, characterized in that in which two heat exchangers plates (20, 21) are connected in series, characterized in that one of the heat exchangers (20) is above the ceiling (22) , between the roof base (23) and the intake air inlet (24), and the other heat exchanger is below the ceiling of the room (22) to ventilate and deaerate ,. and, preferably, the   exhaust fan is between the two   annular heat baths with plates, the intake air fan may be located above the heat exchanger   plates above or below the plate heat exchanger   laughing. 6. Device according to claim 5, characterized in that the heat exchanger (20) located above the ceiling (22) as well as the heat exchanger (21) located below   ceiling (22) are traversed radially by the exhaust air.   (26, 27) and axially by the intake air (28, 29), the exhaust air entering the lower exchanger and leaving the upper exchanger and the intake air entering the 'exchanger upper and outgoing the lower exchanger, while the intake air, on the way to the exchanger   greater than the lower exchanger, is in exchange   with the exhaust air passing through the exhaust air fan, for example by passing through   by an annular chamber (30) where is the housing of the exhaust air cleaner.   7. Device according to any one of the claims   5 and 6, characterized in that above the roof base (23)   mounted on the ceiling (22) of the room to be aerated and deaerated is   the upper heat exchanger (20) above which the intake air inlet (24) is located, in that the central region of the device is attached to the roof base (23) and comprises the exhaust air fan, and in that the lower region of the device comprises the heat exchanger   (21) and the intake air outlet (31), preferably   the annular chamber (30) of the upper heat exchanger, the exhaust air fan housing and   the annular chamber of the lower exchanger (21) and possibly   the inlet (24) and the outlet (31) of intake air being arranged coaxially with each other and forming the central part of the device, preferably traversed essentially by the exhaust air (32) while there peripheral part surrounding the central part is essentially covered by air admission (28).   8. Device according to any one of the claims   at 7, characterized in that all parts are joined together   in a set picked up, in a casing, in the manner of a cube.   9. Device according to any one of the claims   at 8, characterized in that the heat recovery portion (104) comprises a plurality of, for example two, three, four or six heat exchanger assemblies (109a-109f) each constituting a separate body, operating, for example, according to the principle of crossed currents, having a prismatic shape, for example the form of heat exchangers with   plates or tubes, diametrically opposed or arranged in   the, in that the heat recovery portion (104) comprises   further carries a core containing a portion of the air path and constituting a carrier portion, for example with a hexagonal contour, disposed at the center of the entire device and at the same height as the heat exchanger assemblies and to which the intake air tube (105), preferably coaxial, is connected downwards and that the heat exchanger assemblies are removably arranged on a carrier part of the device which may comprise, for example, the heart.   10. Device according to claim 9, characterized in that the heat exchanger assemblies (109a-109f) are each formed of the actual heat exchange portion (110) and an air conductive portion (llla). c), the heat exchange parts (110) themselves preferably having each the form of a cube, and the heat exchanger assemblies having dimensions such that they can be easily handled, while, for example , the   air-conducting part (11a-c) of each sample set   thermal generator (109a-109f) is formed of three bodies   funnel or hood shape with trapezoidal contour in elevation   side and rectangular outline in the plane, each opening in the direction of the inlet or the exhaust and   closed on the opposite side as well as on the longitudinal sides,   widening towards the open side, these bodies being annexed to the cube of the corresponding heat exchange part, each on the opposite side to the heart as well as on the sides turned towards   the exhaust air outlet and the intake air inlet.   11. Device according to claim 10, characterized in that the core (113) has, on each side facing the open sides of the funnel-shaped bodies, or fume hood, an air channel (112d, 112e) connected at this side and connected by its opposite side to the exhaust air or intake air path.   12. Device according to any one of the claims   9 to 11, characterized in that the core (113) is arranged on the roof base (106), for example placed on it and that the heat exchanger assemblies are each applied flat, by one of their side faces, all against a corresponding outer surface of the core, corresponding to one side of the hexagonal contour and are each arranged, preferably releasably, on the heart by means of a quick coupling.   13. Device according to any one of the claims   9 to 12, characterized in that, in the case of two heat exchanger assemblies, these are contiguous in a position diametrically opposed to two opposite lateral faces of the heart (113) with a hexagonal contour, whereas in the case of three sets of heat exchanger, they are contiguous to three lateral faces of the heart (113) with hexagonal contour, located at 120 from one another, or that in the case of four sets of heat exchanger arranged in groups of two, the two sets of each group of two are contiguous to neighboring lateral faces of the heart (113) with a hexagonal contour and between the two groups of two each remains an unoccupied lateral surface of the heart, or that finally, in the case of six sets of heat exchanger, these are contiguous each   at a lateral face of the heart (113) with a hexagonal contour.   14. Device according to any one of the claims   9 to 13, characterized in that the exhaust air stream (141) first passes through the passage of the roof base, which after having been twice deflected to 90 it passes axially through the part of the roof. corresponding heat exchange of the heat exchanger assembly, towards the exhaust air head, and then, after being deflected again   twice 90's, he goes outside again in direct   axially to the outside through the exhaust air head.   while the intake air stream (142) radially traverses the corresponding heat exchange portion of the   the heat exchanger assembly and flows then, after deviation   900, to the intake air tube for introduction into the duit in the room to air.   15. Device according to any one of the claims   1 to 4, characterized in that the heat recovery portion (140) has two groups of heat exchanger assemblies   (143, 144) connected in series in the direction of   flow and geometrically superimposed, including for example   each 2, 3, 4, or 6 of these sets, the sets of samples   of the thermal generator, corresponding in the two groups (143, 144), being connected in series and preferably being 19 2 4 7 155 9   traveled successively in the axial direction by the current   exhaust air (141), and in that the core (145)   an axial dimension corresponding to two stages.   Device according to claim 15, characterized in that the series-connected heat exchanger assemblies (150, 151) are successively traversed radially by the intake air stream (154), which, after having left the first set and before entering the second, is deflected twice 90, the openings of the funnel-shaped body or hood turned away from the intake air tube may, for example, be turned   to each other, and to be interconnected, and the opening   intake air inlet may be provided on the core (152) and extend only over a portion of   the height (h), for example on half the height only   but on the whole width (b).   17. Device according to any one of the claims   9-16, characterized in that the intake air (154) travels directly to the intake air outlet opening without detouring the heat exchanger assemblies (150, 151) by example by switching elements such as distributors, or the like, by means of which the intake air stream coming from the inlet opening is diverted before it enters the exchanger assemblies (150, 151) and is introduced directly into the intake air tube.