DE20118788U1 - radiator - Google Patents

Description

-1 - KEIL&SCHAAFHAUSEN

patent attorneys

radiator

The invention relates to an air heating/air conditioning unit for private or commercial spaces. Such devices serve to combine heating or cooling and ventilation.

According to the aim of the present invention, this air heating/air conditioning unit should take up little space and therefore be able to be installed in many places, preferably even in a building wall. Furthermore, its function should be reliable, have an attractive appearance and a low noise level, and meet the high requirements for heating, cooling, ventilation and air conditioning with a good level of performance. In a special embodiment, preheating of fresh air passed through the unit should not impair the efficiency of the heat exchanger.

This object is achieved according to the invention with an air heating/air conditioning unit which has a small depth of, for example, only a few centimeters, such as not significantly more than about 6 cm, and in which room air and/or, if applicable,

preheated fresh air supplied under pressure can be introduced into a housing via preferably low-noise nozzles in such a way that fresh air and/or room air in the predetermined ratio of room air : fresh air, e.g.

2:1, through the housing under heating or cooling at a

16 November 2001 P 49 G 7

-2- Kel&Schaafhausen

PATENT ATTORNEYS

heat exchanger element and the air mixture is released upwards from the housing into the room to be heated or cooled.

This means that the invented air heating/air conditioning unit has only small dimensions in terms of depth and can be installed even where there is little space. The compact, flat design also contributes to very favorable air flow conditions, which leads to a defined proportionate mixing of fresh air and room air in front of the heat exchanger element.

As explained in more detail below, the ratio between room air and fresh air can be specified for each device. Good efficiency can be achieved by releasing the heated or cooled air mixture upwards into the room to be heated. The compact design also allows the air used for room air conditioning to be heated or cooled quickly due to the relatively large heat transfer surface of the heat exchanger element. For example, finned tubes through which a heat exchange medium flows, or electric heating rods, can serve as heat exchangers. Since the heat exchanger element designed as a finned tube can be connected to a small-volume circulation system, the risk of leaks is relatively low.

In a further development of the inventive concept, the inlet and outlet for the heat exchange medium of the heat exchanger element are arranged on the same side of the housing - right or left. This makes the assembly of the heat exchanger element very easy. Water or cooling water heated by solar technology, exhaust gases from a burner, etc. can be used as the heat exchange medium.

November 16, 2001 P 4&Thethgr; G7

- 3 - KEIL&SCHAAFHAUSEN

patent attorneys

In addition, in the heat exchanger element, the heat exchange medium can first be introduced into an inner longitudinal pipe by means of a double connection fitting and then returned from there into an outer longitudinal pipe surrounding it, so that a favorable countercurrent principle is created.
5

The air flow is further optimized if a front panel of the housing below the heat exchange element in the area of nozzles has a row of lower, e.g. vertical, inlet slots for sucking in the room air to be heated or cooled and above them a row of upper vertical outlet slots for heated or cooled air, whereby the ratio of the effective length of the upper outlet slots to the effective length of the lower inlet slots can represent a measure of the proportion of room air that is absorbed into the air mixture due to the flow of fresh air introduced under pressure.

While the heat exchanger element can be fixed in the housing at one end, as already mentioned, via a double connection fitting, in a further embodiment of the invention it is preferably clamped in the housing of the air heating/air conditioning unit at least on the other side, e.g. by means of plastic clips, in a detachable and vibration-free manner and is thus also easy to replace.

A further optional feature of the present invention is that the nozzles are combined in a preferably replaceable nozzle strip, e.g. made of plastic, which extends in the longitudinal direction of the housing. The air outlet openings of the nozzles are connected to one another, e.g. by a longitudinal air channel in the nozzle strip. In this way, not only is the production of the nozzles cheaper, but their installation is also made easier while they function reliably and the air flow is evenly distributed over the length of the air heating/air conditioning unit.

1ft Mnimm her 5001 P 49 G 7

- 4 - WEIL&SCHAAFEIAUSEN

patent attorneys

It is advantageous if the nozzle strips can be inserted interchangeably into the longitudinal slots of the partition wall.

According to a further embodiment of the invention, the housing has a lower air inlet chamber for pressurized, possibly preheated, fresh air and an upper air outlet chamber for the mixture of fresh air and room air, in the dividing wall of which the nozzles are arranged, preferably directed towards the heat exchanger element. This results in very favorable flow conditions in connection with the desired heat exchange. The mixing of fresh air and sucked-in room air takes place in a mixing chamber area of the air outlet chamber in front of the heat exchanger element.

The partition wall is preferably provided in the area of the lower vertical inlet slots of the front panel, whereby the aforementioned ratio of room air to fresh air can be adjusted depending on the height of the partition wall relative to the lower vertical inlet slots of the front panel.

In a simple flat design, the housing is formed, for example, by a flat housing shell and the front panel already mentioned.

Due to the aforementioned interchangeability of individual elements, the respective air heating/air conditioning unit can be easily adapted to local conditions.

In a further embodiment of the invention, the fresh air is guided back and forth through, for example, meander-like baffles in the air inlet chamber, preferably in the longitudinal direction of the housing, and the room air is sucked in through the lower inlet slots of the front panel distributed over the length of the housing due to the fresh air flowing out of the nozzles.

16 November 2001 P 49 G 7

-5- KmL&SCHAAFHAUSEN

PATENT ATTORNEYS

This ensures a uniform and noiseless air outlet from the nozzles and a good mixing of the air flows.

Particularly good results are achieved when the conditions specified in claim 12 are met.

The invention also relates to another air heating/air conditioning unit of low depth, which can be a further development of the previously described air heating/air conditioning unit, but can also be an independent device. In this case, preheated fresh air is led from a first air inlet chamber via preferably low-noise nozzles into a mixing chamber and room air is thereby sucked via lower, preferably vertical air inlet slots in the front panel into a second air inlet chamber and from there via a heat exchanger element into the mixing chamber; the air mixture thus produced is released from the mixing chamber via upper, preferably vertical outlet slots in the front panel into the room to be heated or cooled. In this case, only the sucked-in room air is led through the heat exchanger.

Such a device is, for example, a maximum of 6 mm deep, has a height of less than 300 mm, a low noise level of < 30 dBA and a low pressure loss of < 20-30 Pa.

In such an air heating/air conditioning device, the heat exchanger element is preferably arranged between a lower second air inlet chamber and an upper mixing chamber. In this way, the air flow within the device occurs essentially from bottom to top.

To further improve the efficiency, the nozzles leading into the mixing chamber can be provided with a flat, narrow channel with

16 November 2001 P 49 G 7

-6- KHL&SCHAAFHAUSEN

patent attorneys

the first air inlet chamber, wherein the channel is formed either between a wall delimiting the mixing chamber and the housing rear wall or between the heat exchanger element and the housing rear wall, depending on whether the first air inlet chamber is arranged above or below the heat exchanger element.

The flow pattern is particularly improved when the nozzles pointing in the direction of the air flow of the room air from the inlet slots to the outlet slots are arranged at the lower or upper end of the flat, narrow channel. This creates a particularly low noise level while avoiding a Helmholtz resonator effect, which occurs with injector nozzles that are arranged on the circumference of a pressure chamber, such as the first air inlet chamber.

The nozzles pointing in the direction of the air flow of the room air from the inlet slots to the outlet slots are preferably arranged at the lower or upper end of the flat, narrow duct.

The air heating/air conditioning unit can be designed to be as flat as possible with a good effective cross-section if the mixing chamber is separated from the first air inlet chamber or a remaining part of the housing interior by a wall containing the nozzles, which runs obliquely from the nozzles arranged at their lower end to the upper end of the upper outlet slots.

The conditions set out in claim 18 have proven particularly useful.

A further embodiment of the air heating/air conditioning units described above is characterized by the fact that the first air inlet chamber for the possibly preheated fresh air is separated from the mixing chamber preferably located below

Wnwpmhpr 7001 P 49 G 7

-7- COOLING&SHEEP HOUSES

patent attorneys

is separated by an approximately horizontal wall containing the nozzles, that the heat exchanger is inclined to the front panel to form a second air inlet chamber for the room air, preferably tapering downwards, and that the nozzles are arranged in the area of the smallest distance between the heat exchanger element and the rear wall of the mixing chamber. In this case, a heat exchanger element with a relatively large effective cross-section can be used without the depth of the device exceeding a predetermined value of approximately 6 cm.

In this embodiment, the geometric parameters specified in claim 20 have proven particularly useful. This achieves an optimal intake rate for the room air.

Of course, instead of the slots specified, entry and/or exit openings of a different shape can also be used in the front panel.

Furthermore, instead of or in addition to the air outlet slot(s), an air-permeable textile material can be provided, with the help of which different permeabilities can be achieved.
20

In order to give a certain direction to the air flow exiting the device, the air-permeable textile material can be partially covered or supported by an air-impermeable layer.

Further aims, features, advantages and possible applications of the present invention will become apparent from the following description of embodiments with reference to the drawing. All described and/or illustrated features form the subject matter of the invention on their own or in any combination, regardless of their summary in individual claims or their reference back to them.

16 November 2001 P 49 G 7

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-8th-

Keil&Schaafhausm PATENT ATTORNEYS

Show it:

Fig. 1 an air heating/air conditioning unit incorporating the invention in

front view,

Fig. 2 the air heating/air conditioning unit of Fig. 1 in side view,

Fig. 3 the air heating/air conditioning unit according to Fig. 1 in oblique view at

front panel removed,

Fig. 4 the detail IV in Fig. 3,

Fig. 5 the detail V in Fig. 3,

Fig. 6 the shell-like housing of an inventive air heat/

Air conditioning unit with the front panel removed,

Fig. 7 the shell-like housing according to Fig. 6 in side view,

Fig. 8 the housing of Fig. 6 in oblique view,

Fig. 9 shows a nozzle bar designed according to the invention in side view,

Fig. 10 the nozzle bar of Fig. 9 in plan view,

Fig. 11 the nozzle bar of Fig. 9, slightly reduced, in oblique view,

Fig. 12 the detail XII in Fig. 9,

16 November 2001

P 49 G 7

- 9 - KEIL&SCHAAFHAUSEN

patent attorneys

Fig. 13a shows schematically in vertical section another embodiment of an air heating/air conditioning device according to the invention,

Fig. 13b is an enlarged detail of the air conditioning unit according to Fig. 13a seen from the side,

Fig. 14a shows schematically in vertical section a further embodiment of a
and 14b of the air heating/air conditioning device according to the invention, the illustration in Fig. 14a with reference numerals and the illustration in Fig. 14b with the preferably to be observed dimensions

is provided,

Fig. 15a similar representations as in Fig. 14a and 14b for a still
and 15b further embodiment of an inventive

Air heating/air conditioning unit,

Fig. 16a in vertical section a still further air heating/air conditioning device embodying the invention, and

Fig. 16b is an enlarged view of the upper part of the

Air conditioning unit according to Fig. 16a.

The air heating/air conditioning unit 1 shown in Fig. 1 is designed as a shallow element. This means that air flows through a flat housing 3, which is brought to the required temperature by a heat exchanger element 4 in order to heat or cool the room in which the air heating/air conditioning unit 1 is mounted, for example, by means of tabs 20 on a building wall.

-IR Mnuemhw 50D1 P 49 G 7

-10- Kel&Schaafhausen

PATENT ATTORNEYS

A compact design with a small depth that ensures optimal air flow is achieved by the housing 3 being formed from a relatively flat housing shell 13 and a substantially flat front panel 8. The depth of the housing shell 13 is only a few centimeters, i.e., for example, not significantly more than about 6 cm. The interior of the housing is divided by a partition wall 16 into a lower air inlet chamber 14 for fresh air supplied under pressure, possibly preheated, and an upper air outlet chamber 15 located above it.

In the partition wall 16, as can be seen in particular in Fig. 8, several longitudinal slots 17 are provided which are aligned with one another and into which nozzles 2 in the form of nozzle strips 12 are interchangeably inserted as shown in Fig. 3. The design of the nozzle strips 12 and the nozzles 2 can be seen in particular in Figs. 9 to 12. The nozzle strips 12 consist, for example, of plastic, with the respective air outlet channels 21, which are in flow connection with one another via a common longitudinal channel 22, gradually tapering in the flow direction in such a way that practically noiseless air flow is possible. The nozzles 2 in the form of the nozzle strips 12 are aligned as shown in Fig. 3 with a heat exchanger element 4 arranged in the upper air outlet chamber 15. Fresh air, which enters the air inlet chamber 14 via an elongated air inlet 18 located in the bottom of the lower air inlet chamber 14, is thus fed directly to the heat exchanger element 4 via the nozzles 2 and passes through the heat exchanger element 4 extending over the length of the housing 3, where the heat absorption or release takes place evenly over its entire length.

The heat exchanger element 4 located in the upper air outlet chamber 15 is held on its one (left) side, e.g. by means of clips 11 made of plastic, as can be seen in particular from Fig. 4, while on its

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-11-

Keil&Schaafhausen

PATENT ATTORNEYS

opposite (right) side is supported on the partition wall 16 via a double connection fitting 7 for the heat exchange medium.

The heat exchange medium passes through a connecting piece 19 to the inlet 5 in the partition wall 16 and from there into the double connection fitting 7, as can be seen in Fig. 5. This branch of the double connection fitting 7 opens into an inner pipe of the heat exchanger element 4, which forms a flow line and which, at its opposite end, i.e. adjacent to the clip holder 11, merges into an outer return pipe surrounding the inner pipe, to which the other branch of the double connection fitting 7 is connected. The latter branch then opens into the outlet 6 in the partition wall 16. As can be seen, inlet 5 and outlet 6 for the heat exchange medium are provided on one and the same side of the housing (right), which brings considerable advantages in terms of connection, but also in terms of the heat exchanger function.

Due to the directed, uniform discharge of fresh air from the nozzles 2 over practically the entire length of the air heating/air conditioning unit 1, room air is entrained by the fresh air through the vertical inlet slots 9, which are open in the upper area at least. With the help of different opening cross sections of the nozzles 2 and opening cross sections of the slots 9, 10, the ratio of room air:fresh air can be determined separately for each individual air heating/air conditioning unit. Subsequent changes are also easy to make, since both the nozzle strips 12 can be easily exchanged for others with different flow cross sections and the position of the partition wall 16, which, as can easily be seen from Fig. 1, determines the free opening cross section of the vertical lower inlet slots 9, can be changed in terms of its height, since it is formed from a section of a sheet metal part which is positioned interchangeably on the bottom of the housing tray 13.

16 November 2001

P 49 G 7

-12- KEL&SCHAAFHAUSEN

patent attorneys

The heated or cooled mixture of fresh air and room air can then exit upwards via the row of upper vertical slots 10 into the room to be heated or cooled.
5

The number, width and height of the slots 9, 10 can also be changed if necessary by simply replacing the front panel 8.

It is also possible to supplement the invented air heating/air conditioning unit 1 with a humidifier and/or air filter for air conditioning purposes.

The air heating/air conditioning unit 1 shown in Fig. 13a has a housing 3, within which the heat exchanger element 4 is arranged approximately halfway up and extends over its entire depth. Preheated fresh air, if necessary, is introduced into the lower area of the air inlet chamber 14; the fresh air flows through nozzles 2 in the horizontal partition wall 16 in the direction of the heat exchanger element 4. In this way, the fresh air sucks in room air from the lower inlet openings 9, whereupon the mixture of fresh air and room air passes through the heat exchanger element 4. The heated air mixture passes into the air outlet chamber 15 and from there through upper outlet openings 10 in the front panel 8 into the room to be heated or cooled. Fig. 13b shows the parameters which should be particularly selected when designing the air heating/air conditioning unit 1. Here, g is the outlet diameter of the nozzles 2 in the partition wall 16, u is the distance between the outlet nozzles 2 and the fins of the heat exchanger element 4, s is the distance between the nozzles 2 in the partition wall 16 and t is the distance between the fins of the heat exchanger element 4.

16 November 2001 P 49 G 7

-13- KEIL&SCHAAFHAUSEN

patent attorneys

In the air heating/air conditioning unit 1 according to Fig. 14a and 14b, the possibly preheated fresh air is guided from a first air inlet chamber 23 via low-noise nozzles 2 in a mixing chamber 24 in such a way that room air is sucked via lower vertical air inlet slots 9 of the front panel 8 into a second air inlet chamber 25 and from there via a heat exchanger element 4 into the mixing chamber 24. The air mixture passes from the mixing chamber 24 via upper vertical outlet slots of the front panel 8 into the room to be heated or cooled. The heat exchanger element 4 is therefore connected between a lower second air inlet chamber 25 and an upper mixing chamber 24, so that only the room air is heated in the heat exchanger element 4. The mixing with the possibly preheated fresh air only takes place after the heat exchanger element 4. The nozzles 2 opening into the mixing chamber 24 are connected to the first air inlet chamber 23, to which the fresh air is supplied under pressure, via a flat, narrow channel 26 between an inclined partition wall 29, which accommodates the nozzles 2 in its lower area. The wall 29 runs diagonally from the nozzles 2 arranged at its lower end near the housing rear wall 30 to the upper end of the upper outlet slots 10 in the front panel 8. This causes the mixing chamber 24 to taper in the direction of flow, which promotes the air outlet. The nozzles 2 pointing in the direction of the air flow of the room air from the inlet slots 9 to the outlet slots 10 are arranged at the lower end of the flat, narrow channel 26. The parameters that receive special attention are included in Fig. 14b. Here, w1 is the air velocity in the flat narrow channel 26, w2 is the air velocity in the nozzles 2, b is the width of the heat exchanger element 4, c is the effective length of the inclined wall 29 behind the nozzles 2, d is the length of the closed part of the front plate 8 between the heat exchanger outlet 28 and the lower end of the outlet slots 10, and e is the length of the vertical air outlet slots 10.

·

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·

-14- KEIL&SCHAAFHAUSEN

patent attorneys

The air heating/air conditioning unit 1 according to Fig. 15a and 15b differs from that shown in Fig. 14a and 14b essentially in that the first air inlet chamber 23, into which the possibly preheated fresh air is fed under pressure, is arranged below the heat exchanger element 4. Due to this, the flat, narrow channel 26 is now located between the rear wall 30 of the housing 3 and the heat exchanger element 4. The inclined wall 29, on the other hand, lies directly against the rear wall 30 in the area of the nozzles 2.

The air heating/air conditioning unit 1 according to Fig. 16a and 16b is characterized in that the fresh air is introduced into a first air inlet chamber 23 located at the top. The mixing chamber 24 located below is separated by a horizontal wall 32 having the nozzles 2. The heat exchanger element 4 is inclined below the wall 32 in such a way that, on the one hand, the nozzles 2 are arranged where the heat exchanger element 4 has the smallest distance f from the rear wall 30 and, on the other hand, a downwardly tapering second air inlet chamber 25 is designed as a suction chamber in front of the heat exchanger element 4 for receiving the room air. The air mixture produced from possibly preheated fresh air and room air heated in the heat exchanger element 4 leaves the housing 3 via lower outlet openings of the front panel 8 below the heat exchanger element 4. In this embodiment, the front panel as a whole is provided with evenly distributed air inlet and outlet openings. The type of design allows the escaping air to be given a specific direction, in the case shown diagonally downwards. The parameters shown, which should be adhered to, are the following: A1 the cross-sectional area of the first air inlet chamber 23, A2 the outlet area of the nozzles 2, f the smallest distance of the inclined heat exchanger element 4 from the rear wall 30 of the mixing chamber 24, g the outlet diameter of the nozzles 2, h the largest distance of the inclined heat exchanger element 4

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-15- KHL&SCHAAFHAUSEN

patent attorneys

from the front panel 8, and i is the length of the heat exchanger element 4. Due to the inclination of the heat exchanger element 4, a high efficiency can be achieved with a small device depth.

When in connection with the described embodiments and in the rest of the description and the patent claims reference is made to "above" or "below", it is obvious to the average person skilled in the art that the air heating/air conditioning units in question can also be set up or hung upside down, so that the corresponding terms are reversed.

16 November 2001 P 49 G 7

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-16 - KHL&SCHAAFHAUSEN

patent attorneys

List of reference symbols

1 air heating/air conditioning unit

2 nozzles

3 Housing

4 Heat exchanger element

5 Entrance

6 Outlet

7 Double connection fitting 8 Front panel

9 lower entry slots

10 upper exit slots

11 clips

12 Nozzle bar

13 Housing shell

14 Air inlet chamber (pressure chamber)

15 Air outlet chamber

16 Partition wall

17 Longitudinal slots 18 Air inlet

19 Connector

20 mounting tabs

21 Air outlet duct

22 Longitudinal channel

23 first air inlet chamber (pressure chamber)

24 Mixing chamber

25 second air inlet chamber (suction chamber)

26 Channel

27 Heat exchanger inlet 28 Heat exchanger outlet

1R Niwemhfir 2001 P 49 G

■··"= 1 1 .:V:

-17- Keil&Schaafhausen

PATENT ATTORNEYS

29 sloping wall

30 Rear wall

31 remaining part of the building interior

32 horizontal wall
5

7ΩΩ1 P 49 G 7

Claims (22)

1. Air heating/air conditioning unit ( 1 ) of low depth, in which room air and/or possibly preheated fresh air can be introduced into a housing ( 3 ) via preferably low-noise nozzles ( 2 ) in such a way that the fresh air and/or the room air in a predetermined room air:fresh air ratio of e.g. 2:1 is passed through the housing ( 3 ) past a heat exchanger element ( 4 ) while being heated or cooled and the air mixture is released upwards from the housing ( 3 ) into the room to be heated or cooled. 2. Air heating/air conditioning unit according to claim 1, characterized in that the inlet ( 5 ) and outlet ( 6 ) for the heat exchange medium of the heat exchanger element ( 4 ) are arranged on the same side of the housing. 3. Air heating/air conditioning unit according to claim 1 or 2, characterized in that in the heat exchanger element ( 4 ) the heat exchange medium is first introduced into an inner longitudinal pipe by means of a double connection fitting ( 7 ) and then returned in an outer longitudinal pipe surrounding this. 4. Air heating/air conditioning unit according to one of claims 1 to 3, characterized in that a front panel ( 8 ) of the housing ( 3 ) has a row of lower, e.g. vertical, inlet slots ( 9 ) and a row of upper, e.g. vertical, outlet slots ( 10 ). 5. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the heat exchanger element ( 4 ) is releasably clamped into the housing ( 3 ) on at least one side, e.g. by means of clips ( 11 ) made of plastic. 6. Air heating/air conditioning device according to one of the preceding claims, characterized in that the nozzles ( 2 ) are combined in nozzle strips ( 12 ) extending in the longitudinal direction of the housing ( 3 ), preferably exchangeable, e.g. made of plastic. 7. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the housing ( 3 ) has a lower air inlet chamber ( 14 ) and an upper air outlet chamber ( 15 ), in the partition wall ( 16 ) of which the nozzles ( 2 ), preferably directed towards the heat exchanger element ( 4 ), e.g. in the form of the replaceable nozzle strips ( 12 ), are arranged. 8. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the nozzle strips ( 12 ) can be interchangeably inserted into longitudinal slots ( 17 ) of the partition wall ( 16 ). 9. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the partition wall ( 16 ) is provided in the region of the lower vertical inlet slots ( 9 ) of the front panel ( 8 ). 10. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the housing ( 3 ) is formed by a flat housing shell ( 13 ) and the preferably replaceable front panel ( 8 ). 11. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the fresh air is guided back and forth, for example by meander-like baffles in the air inlet chamber ( 14 ), preferably in the longitudinal direction, and the room air is sucked in through the lower inlet slots ( 9 ) of the front panel ( 8 ) distributed over the length of the housing ( 3 ). 12. Air heating/air conditioning unit according to one of the preceding claims, characterized in that the following conditions are met:

2 < s/g < 5

7 < u/g < 14

0.6 < t/g < 1.2,

if
s is the distance between the nozzles 2 ,
g is the outlet diameter of the nozzles 2 ,
u is the distance between the nozzles 2 and the heat exchange element 4 , and
t the distance between the heat exchanger fins
are. 13. Air heating/air conditioning unit ( 1 ) of low depth, e.g. according to one of claims 1 to 12, in which possibly preheated fresh air is led from a first air inlet chamber ( 23 ) via preferably low-noise nozzles ( 2 ) into a mixing chamber ( 34 ) and thereby room air is sucked via possibly lower, preferably vertical air inlet slots ( 9 ) of the front panel ( 8 ) into a second air inlet chamber ( 25 ) and from there via a heat exchange element ( 4 ) into a mixing chamber ( 24 ) and the air mixture is released from the mixing chamber ( 24 ) via possibly upper, preferably vertical outlet slots ( 10 ) of the front panel ( 8 ) into the room to be heated or cooled ( Fig. 14a to 15b). 14. Air heating/air conditioning unit ( 1 ) according to claim 13, characterized in that the heat exchanger element ( 4 ) is arranged between a lower second air inlet chamber ( 25 ) and an upper mixing chamber ( 24 ). 15. Air heating/air conditioning unit ( 1 ) according to claim 13 or 14, characterized in that the nozzles ( 2 ) opening into the mixing chamber ( 24 ) are connected to the first air inlet chamber ( 23 ) via a flat, narrow channel ( 26 ), the channel ( 26 ) being formed either between a wall ( 29 ) delimiting the mixing chamber ( 24 ) and the housing rear wall ( 30 ) or between the heat exchanger element ( 4 ) and the housing rear wall ( 30 ). 16. Air heating/air conditioning unit ( 1 ) according to claim 15, characterized in that the nozzles ( 2 ) pointing in the direction of the air flow of the room air from the inlet slots ( 9 ) to the outlet slots ( 10 ) are arranged at the lower and upper ends of the flat, narrow channel ( 26 ). 17. Air heating/air conditioning device according to one of claims 13 to 15, characterized in that the mixing chamber ( 24 ) is separated from the first air inlet chamber ( 23 ) or a remaining part of the housing interior ( 31 ) by a wall ( 29 ) containing the nozzles ( 2 ) which runs obliquely from the nozzles ( 2 ) arranged at their lower end to the upper end of the upper outlet slots ( 10 ). 18. Air heating/air conditioning unit ( 1 ) according to one of claims 13 to 17, characterized in that the following conditions are met:

0.2 < w1/w2 < 0.5

2.5 < c/b < 4

1.5 < d/b < 2.5

1.2 < e/b < 1.8

if
w1 is the air velocity in the flat narrow channel ( 26 ),
w2 is the air velocity in the nozzles ( 2 ),
b is the width of the heat exchanger element ( 4 ),
c is the effective length of the wall ( 29 ),
d is the length of the closed part of the front plate ( 8 ) between the heat exchanger outlet ( 28 ) and the lower end of the outlet slots ( 10 ), and
e is the length of the vertical air outlet slots ( 10 )
are. 19. Air heating/air conditioning unit ( 1 ) according to one of claims 13 to 18, characterized in that the first air inlet chamber ( 23 ) for the possibly preheated fresh air is separated from the mixing chamber ( 24 ) preferably located underneath by an approximately horizontal wall ( 29 ) having the nozzles ( 2 ), that the heat exchanger ( 4 ) is inclined to the front panel ( 8 ) to form a second air inlet chamber ( 25 ) for the room air, which preferably tapers downwards, and that the nozzles ( 2 ) are arranged in the region of the smallest distance (f) of the heat exchanger element ( 4 ) from the rear wall ( 30 ) of the mixing chamber ( 24 ) ( Fig. 16a and 16b). 20. Air heating/air conditioning unit ( 1 ) according to claim 19, characterized in that the following conditions are met:

A1 > 3 × A2

5 < f/g < 8

0.15 < h/i,

if
A1 is the cross-sectional area of the first air inlet chamber ( 23 ),
A2 is the exit area of the nozzle ( 2 ),
f the smallest distance of the inclined heat exchanger element ( 4 ) from the rear wall ( 30 ) of the mixing chamber ( 24 ),
g is the outlet diameter of the nozzles ( 2 ),
h is the greatest distance of the inclined heat exchanger element ( 4 ) from the front plate ( 8 ), and
i is the length of the heat exchanger element ( 4 )
are. 21. Air heating/air conditioning unit ( 1 ) according to one of the preceding claims, characterized in that an air-permeable textile material is provided instead of or in addition to the air outlet slots ( 10 ). 22. Air heating/air conditioning unit ( 1 ) according to claim 21, characterized in that the air-permeable textile material is partially covered or supported by an air-impermeable layer.