EP1959205B1 - Compact indoor unit for under-floor installation - Google Patents

Compact indoor unit for under-floor installation Download PDF

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Publication number
EP1959205B1
EP1959205B1 EP08001102.6A EP08001102A EP1959205B1 EP 1959205 B1 EP1959205 B1 EP 1959205B1 EP 08001102 A EP08001102 A EP 08001102A EP 1959205 B1 EP1959205 B1 EP 1959205B1
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EP
European Patent Office
Prior art keywords
air
housing
side wall
heat exchanger
ventilation device
Prior art date
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Active
Application number
EP08001102.6A
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German (de)
French (fr)
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EP1959205A2 (en
EP1959205A3 (en
Inventor
Ralf Dipl.-Ing. Wagner
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LTG AG
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LTG AG
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Publication of EP1959205A2 publication Critical patent/EP1959205A2/en
Publication of EP1959205A3 publication Critical patent/EP1959205A3/en
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Publication of EP1959205B1 publication Critical patent/EP1959205B1/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
    • F24F1/0053—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted at least partially below the floor; with air distribution below the floor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0025—Cross-flow or tangential fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/40—HVAC with raised floors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/12—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by creating turbulence, e.g. by stirring, by increasing the force of circulation

Definitions

  • the invention relates to an air-conditioning device, in particular recirculation device, with a housing in which a vortex generator provided with a cross-flow fan and a heat exchanger are arranged.
  • the subject of the invention is a Umluftfancoil.
  • the ventilation device or the Umbuchfancoil sucks by means of the cross-flow fan room air from a room, especially living room, office or the like.
  • the sucked air passes through a heat exchanger, which is tempered by means of hot or cold water, so that the sucked air is treated, then passes through the cross-flow fan and re-enters the room as a treated air flow.
  • a heat exchanger which is tempered by means of hot or cold water, so that the sucked air is treated, then passes through the cross-flow fan and re-enters the room as a treated air flow.
  • An air conditioning device of the type mentioned has a size substantially predetermined by the dimensions of the heat exchanger and the cross-flow fan. If the heat exchanger is arranged horizontally, then a relatively small overall height can be realized with a large overall depth predefined by the area of the heat exchanger. If the heat exchanger is installed edgewise, the result is a correspondingly large height, with a smaller overall depth.
  • the length of the ventilation device is determined essentially by the length of the heat exchanger and by the length of the impeller of the cross-flow fan and has for the respective installation position only minor importance, since appropriate dimensions can be specified and by row-shaped arrangement of several ventilation devices and correspondingly long zones of the room can be equipped.
  • the ventilation device is used as a base unit, ie within a hollow floor, the lowest possible height is required, with the result that a horizontally arranged heat exchanger results in a correspondingly large overall depth.
  • floor devices are arranged in the area of the facade of the room in the floor, wherein an air inlet opening and an air outlet opening are covered by means of a walk-in grid and the grid is flush with the floor.
  • the grid appears strongly and reduces the footprint in the room, since the grid is to be kept clear so as not to interfere with the air currents or even prevent.
  • Such a device is for example from the published patent application DE 20 2004 003 427 U1 known.
  • the invention is therefore an object of the invention to provide a ventilation device of the type mentioned, in which there is only a very small depth.
  • a ventilation device of the type mentioned, in which there is only a very small depth.
  • such a device preferably has only a low height and can therefore - if desired - be used as a floor installation device.
  • the heat exchanger is arranged in such an inclined position in the housing that it in particular for the formation of at least one air space with its cross-sectional contour on the inner sides of a ceiling wall and a side wall of the Housing rests and that the heat exchanger protrudes with its cross-sectional contour to almost a vortex former or to the vortex former, the heat exchanger - seen in the vertical direction - the cross-flow fan considerably, in particular approximately half overlaps.
  • the heat exchanger is therefore in an inclined position in the housing of the ventilation device, so it is neither lying nor standing upright arranged, but between these two positions.
  • the heat exchanger With its cross-sectional contour, it abuts at least on the inner sides of a ceiling wall, and a side wall and a bottom wall of the housing. If the heat exchanger has a rectangular cross-sectional contour, two corner edges of the heat exchanger touch the insides of the top wall and side wall. By the system, the interior of the housing is separated accordingly, so that an air space is formed, which is formed on the one hand by the heat exchanger and on the other hand by parts of the housing.
  • the cross flow fan Since the obliquely arranged heat exchanger furthermore projects with its cross-sectional contour almost to a vortex former of the cross flow fan or even touches it, it is extremely close to the cross flow fan, the cross flow fan surprisingly provides its size corresponding air flow capacity, so that the effectiveness of the cross flow fan is not limited.
  • a corner edge In the case of a heat exchanger which is rectangular in cross-section, a corner edge preferably extends almost to or even touches the vortex former.
  • the crossflow fan or its impeller overlaps significantly is so not only slightly marginal, but so much that about half or even slightly more than half of the circular cross-section structure of the impeller of the cross-flow fan is overlapped. The overlap can then go beyond half of the cross-section of the cross-flow fan, if the vortex generator is not centered, that is not arranged approximately at the height of the axis of rotation of the impeller, but offset.
  • the vortex former is formed at least for the most part or only by a substantially planar flat element, in particular a flat sheet metal.
  • This flat element or sheet metal preferably extends vertically or approximately vertically. Due to the small dimensions of the vortex generator - seen transversely to the flat element - is a correspondingly large receiving space for the obliquely arranged heat exchanger in this area available, so that it can be arranged accordingly close to the cross-flow fan.
  • the heat exchanger rests with its cross-sectional contour on the inside on a bottom wall of the housing. Accordingly, it extends between ceiling wall and bottom wall, touching these two walls. The distance from the ceiling wall and bottom wall therefore dictates the skew angle of the heat exchanger.
  • the housing has at least one air inlet opening and at least one air outlet opening on its ceiling wall or in the region of the ceiling wall. Since the ventilation device is preferably used as a floor installation device, these two air openings are on its ceiling wall and consequently in the floor space of the room.
  • the air inlet opening is a recirculation inlet opening and if the air outlet opening is a circulating air outlet opening, i.e. the ventilation device is a recirculation device which draws in room air, treats the temperature and then returns it to the room from which it has sucked in the air.
  • the arrangement can be made such that the heat exchanger limits the air inlet opening or the air outlet opening.
  • the vortex former limits the air inlet opening or the air outlet opening.
  • the heat exchanger may have a rectangular cross-sectional contour, so that it rests with its longitudinal edges against the insides of corresponding housing walls and also limits a corresponding air opening with such a longitudinal edge.
  • the housing In order to achieve the smallest possible housing depth, the housing is - seen in cross-section - not rectangular or square, but it increases seen from top to bottom. As a result, it is less deep at the top than at the bottom. However, since only the upper portion of the housing appears in the floor, Such a design is particularly narrow in terms of depth.
  • the ceiling wall of the housing adjoins an oblique side wall zone of the housing which shortens the housing depth at the top, with a longitudinal edge.
  • the side wall namely the mentioned side wall zone is formed obliquely.
  • a vertical side wall section of the side wall then preferably adjoins the lower longitudinal edge of the oblique side wall zone of the side wall. The entire side wall is thus formed in the upper region by the inclined side wall zone and the lower region by the vertical side wall portion.
  • the heat exchanger rests with its cross-sectional contour on the inside of the vertical side wall portion. At a distance from it, the oblique side wall zone, so that in this area a suction / air flow for the room air is available, that is, enters through the air inlet opening in this suction and can then from there over a large area to flow through the heat exchanger.
  • the depth of the ceiling wall of the housing has a dimension of about 20 cm, preferably 20.5 cm.
  • the housing height is chosen so that a floor installation is possible.
  • the ventilation device is thus designed as an underfloor device, in particular underfloor facade device.
  • underfloor façade unit indicates that the ventilation system is installed in the floor, close to the façade, ie in the window area of the room.
  • the housing height has a dimension of about 20 cm, preferably 18.5 cm, so that a trouble-free installation in a raised floor or in a correspondingly different construction of the floor is possible.
  • the cross-flow fan has an impeller, wherein the vortex generator is approximately centrally above the impeller, in particular approximately radially to the latter.
  • the vortex former is preferably designed as a planar flat element, in particular a flat sheet metal. It can be provided that the free end region of the flat element, which points in the direction of the impeller, viewed in cross section, is designed arcuate. As a result, the arc thus formed forms the smallest distance to the impeller, not the end edge of the flat element.
  • a development of the invention provides that the air inlet opening and the air outlet opening are covered by a common air grid. It is further provided that the side wall zone runs parallel or approximately parallel to an inlet surface and / or to an outlet surface of the heat exchanger. Thus, the bank angle of the heat exchanger is about the same size as the bank angle of the sidewall zone.
  • the FIG. 1 shows an air-technical device 1, which is designed as a recirculation device 2, in particular as Um povertyfancoil device 3.
  • the ventilation device 1 forms a floor unit 4, which in the floor of a room to be air-conditioned 5 ( FIG. 5 ) is used such that the top is flush with the floor of the room 5.
  • the ventilation device is preferably arranged along a facade of the room 5, that is to say in the window area or the like.
  • the ventilation device 1 has a housing 6, which has a top wall 7, one of the FIG. 1 not apparent bottom wall 8 has and four side walls 9, 10, 11 and 12 has.
  • the ceiling wall 7 is provided with an air grid 13.
  • the side walls 11 and 12 form end walls which extend vertically and are surmounted by the air grille 13 a bit far.
  • the vertically extending side wall 10 is slightly surmounted by the air grille 13.
  • the side wall 9 is composed of a sloping side wall zone 14 and a vertical side wall section 15.
  • the ceiling wall 7 adjoins with a longitudinal edge 16 at the oblique, the housing depth upwardly shortening side wall zone 14 and a lower longitudinal edge 17 of the sidewall zone 14 adjacent to the vertical side wall portion 15 at.
  • An upper longitudinal edge 18 of the sidewall zone 14 is slightly surmounted by the grille 13.
  • the installation of the ventilation device 1 is carried out with height-adjustable feet 19, which are arranged on Flanschstsammlung 20 in the region of the side walls 11 and 12. If the installation with the feet on a bare floor of the room 5, the ventilation device 1 can adjust by means of height adjustment such that the grille 13 with the floor, for example, stilted floor, the room 5 is aligned. Fastening tabs 21 allow a fixing of the ventilation device 1 in the desired position.
  • FIGS. 1 . 2 . 3 and 4 illustrate that the grille 13 extends over the entire top of the HVAC device 1, covering an air inlet opening 22 and an air outlet opening 23. Air inlet opening 22 and air outlet 23 extend over about three quarters of the extent of the device length I. In the remaining area of the drive motor of a housed inside the housing 6 cross-flow fan 24 and a water connection means for a located in the interior of the housing 6 heat exchanger 25 are arranged.
  • the heat exchanger 25 has a rectangular cross-sectional contour with the corner edges 27, 28, 29 and 30.
  • the heat exchanger 25 has an entry surface 31 and an exit surface 32.
  • the heat exchanger 25 is arranged in an inclined position in the housing 6, that he with its corner edge 17 against the inside 33 of the ceiling wall 7 and with its corner edge 28 against the inner side 34 of the side wall 9, namely the inner side 34 of the side wall portion 15 abuts, so that thereby an air space 35 is delimited in the interior of the housing 6, which serves the air supply to the heat exchanger 25.
  • the corner edge 29 of the heat exchanger 25 abuts against the inner side 36 of the bottom wall 8.
  • the inlet surface 31 of the heat exchanger 25 extends approximately parallel to the plane of the side wall zone 14.
  • the air inlet opening 22, which forms a recirculation inlet opening 37, extends between the longitudinal edge 16 and the corner edge 27.
  • the vortex former 38 is essentially formed by a planar flat element 39, in particular a flat sheet metal, wherein the flat element 39 extends approximately radially and, when viewed perpendicularly, to a rotational axis 40 of an impeller 41 of the crossflow fan 24 at the level of the rotational axis 40.
  • a free end edge 42 of the vortex generator 38 can lie in the plane of the flat element 39, as it is with a solid line from the FIG. 5 evident.
  • the vortex former 38 has an angled end zone, as indicated by dashed line 43 in FIG FIG. 5 is indicated.
  • the arrangement is made such that the corner edge 30 of the heat exchanger 25 extends almost to the vortex former 38.
  • the corner edge 30 touches the vortex former 38.
  • the heat exchanger 25 assumes the aforementioned inclined position in the housing 6, it overlaps - seen in the vertical direction - with its upper zone 44, the impeller 41 of the cross flow fan 24.
  • the arrangement is preferably made such that it overlaps the impeller 41 about halfway.
  • the height h of the housing 6 is only 18.5 cm.
  • the depth t of the housing 6 is in the region of the air grille 13 only 20.5 cm.
  • the depth T of the housing is 24.15 cm.
  • this larger housing depth T is in the floor of the room 5 with respect to the upper, narrower housing depth t, only the narrow housing depth t appears optically.
  • room air 45 of the room 5 is sucked through the recirculation inlet opening 37 into the air space 35 due to the suction effect of the crossflow fan 24 and passes through the heat exchanger 25, by means of a water cycle, not shown, either for heating the room air 45 or for cooling the room air 45 serves.
  • heat-treated room air 45 exits from the outlet surface 32 of the heat exchanger 25, passes through the impeller 41 of the cross-flow fan 24 and flows out of the air outlet 23 and thus back into the room 5 back.
  • the air outlet opening 23 is designed as Um Kunststoffauslassö réelle 46. It is bounded by the vortex former 38 and the side wall 10 and the corresponding side edge of the air grille 13.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Duct Arrangements (AREA)

Description

Die Erfindung betrifft eine lufttechnische Einrichtung, insbesondere Umlufteinrichtung, mit einem Gehäuse, in dem ein mit Wirbelbildner versehener Querstromventilator und ein Wärmetauscher angeordnet sind. Insbesondere handelt es sich beim Gegenstand der Erfindung um einen Umluftfancoil. Die lufttechnische Einrichtung beziehungsweise der Umluftfancoil saugt mittels des Querstromventilators Raumluft aus einem Raum, insbesondere Wohnraum, Büroraum oder dergleichen, an. Die angesaugte Luft passiert einen Wärmetauscher, der mittels heißem oder kaltem Wasser entsprechend temperiert ist, sodass die angesaugte Luft behandelt wird, durchsetzt dann den Querstromventilator und tritt wieder in den Raum als behandelter Luftstrom ein. Alternativ kann selbstverständlich auch derart vorgegangen werden, dass die angesaugte Raumluft zunächst den Querstromventilator passiert, dann den Wärmetauscher durchsetzt und dann wieder in den Raum eintritt.The invention relates to an air-conditioning device, in particular recirculation device, with a housing in which a vortex generator provided with a cross-flow fan and a heat exchanger are arranged. In particular, the subject of the invention is a Umluftfancoil. The ventilation device or the Umluftfancoil sucks by means of the cross-flow fan room air from a room, especially living room, office or the like. The sucked air passes through a heat exchanger, which is tempered by means of hot or cold water, so that the sucked air is treated, then passes through the cross-flow fan and re-enters the room as a treated air flow. Alternatively, it is of course also possible to proceed in such a way that the aspirated room air first passes through the cross-flow fan, then passes through the heat exchanger and then enters the room again.

Eine lufttechnische Einrichtung der eingangs genannten Art ist bekannt. Sie weist eine im Wesentlichen von den Abmessungen des Wärmetauschers und des Querstromventilators vorgegebene Größe auf. Wird der Wärmetauscher liegend angeordnet, so kann eine relativ geringe Bauhöhe bei einer durch die Fläche des Wärmetauschers im Wesentlichen vorgegebenen, großen Bautiefe realisiert werden. Wird der Wärmetauscher hochkant installiert, so ergibt sich eine entsprechend große Bauhöhe, bei einer kleineren Bautiefe. Die Länge der lufttechnischen Einrichtung wird im Wesentlichen durch die Länge des Wärmetauschers und durch die Länge des Laufrads des Querstromventilators bestimmt und weist für die jeweilige Einbauposition nur untergeordnete Bedeutung auf, da entsprechende Maße vorgebbar sind und durch reihenförmige Anordnung mehrerer lufttechnischer Einrichtungen auch entsprechend lange Zonen des Raumes ausstattbar sind. Soll die lufttechnische Einrichtung als Bodengerät, also innerhalb eines Hohlfußbodens, eingesetzt werden, so ist eine möglichst geringe Bauhöhe gefordert, mit der Folge, dass bei liegend angeordnetem Wärmetauscher eine entsprechend große Bautiefe resultiert. Vorzugsweise werden derartige Bodengeräte im Bereich der Fassade des Raumes im Fußboden angeordnet, wobei eine Lufteinlassöffnung und eine Luftauslassöffnung mittels eines begehbaren Gitters abgedeckt sind und das Gitter mit dem Fußboden fluchtet. Bei der erwähnten großen Bautiefe tritt das Gitter stark in Erscheinung und verkleinert die Stellfläche im Raum, da das Gitter freizuhalten ist, um die Luftströmungen nicht zu beeinträchtigen oder gar zu verhindern. Eine derartige Einrichtung ist beispielsweise aus der Offenlegungsschrift DE 20 2004 003 427 U1 bekannt.An air conditioning device of the type mentioned is known. It has a size substantially predetermined by the dimensions of the heat exchanger and the cross-flow fan. If the heat exchanger is arranged horizontally, then a relatively small overall height can be realized with a large overall depth predefined by the area of the heat exchanger. If the heat exchanger is installed edgewise, the result is a correspondingly large height, with a smaller overall depth. The length of the ventilation device is determined essentially by the length of the heat exchanger and by the length of the impeller of the cross-flow fan and has for the respective installation position only minor importance, since appropriate dimensions can be specified and by row-shaped arrangement of several ventilation devices and correspondingly long zones of the room can be equipped. If the ventilation device is used as a base unit, ie within a hollow floor, the lowest possible height is required, with the result that a horizontally arranged heat exchanger results in a correspondingly large overall depth. Preferably, such floor devices are arranged in the area of the facade of the room in the floor, wherein an air inlet opening and an air outlet opening are covered by means of a walk-in grid and the grid is flush with the floor. At the mentioned large depth, the grid appears strongly and reduces the footprint in the room, since the grid is to be kept clear so as not to interfere with the air currents or even prevent. Such a device is for example from the published patent application DE 20 2004 003 427 U1 known.

Der Erfindung liegt daher die Aufgabe zugrunde, eine lufttechnische Einrichtung der eingangs genannten Art zu schaffen, bei der nur eine sehr geringe Bautiefe vorliegt. Vorzugsweise hat ein derartiges Gerät gleichwohl nur eine geringe Bauhöhe und kann demzufolge - sofern erwünscht - als Fußbodeneinbaugerät verwendet werden.The invention is therefore an object of the invention to provide a ventilation device of the type mentioned, in which there is only a very small depth. However, such a device preferably has only a low height and can therefore - if desired - be used as a floor installation device.

Diese Aufgabe wird erfindungsgemäß durch eine als Unterflurgerät ausgebildete lufttechnische Einrichtung mit den Merkmalen von Anspruch 1 gelöst. Bevorzugte Ausführungsformen sind den Unteransprüchen zu entnehmen. Dabei ist der Wärmetauscher derart in Schräglage im Gehäuse angeordnet, dass er insbesondere zur Ausbildung von mindestens einem Luftraum mit seiner Querschnittskontur an den Innenseiten einer Deckenwand und einer Seitenwand des Gehäuses anliegt und dass der Wärmetauscher mit seiner Querschnittskontur bis nahezu an einen Wirbelbildner oder bis an den Wirbelbildner heranragt, wobei der Wärmetauscher - in vertikaler Richtung gesehen - den Querstromventilator erheblich, insbesondere etwa hälftig, überlappt. Der Wärmetauscher befindet sich demzufolge in Schräglage im Gehäuse der lufttechnischen Einrichtung, ist also weder liegend noch hochkant stehend angeordnet, sondern zwischen diesen beiden Positionen. Mit seiner Querschnittskontur stößt er zumindest an die Innenseiten einer Deckenwand, und einer Seitenwand und einer Bodenwand des Gehäuses an. Weist der Wärmetauscher eine rechteckige Querschnittskontur auf, so berühren zwei Eckkanten des Wärmetauschers die Innenseiten von Deckenwand und Seitenwand. Durch die Anlage wird der Innenraum des Gehäuses entsprechend separiert, sodass sich ein Luftraum ausbildet, der einerseits von dem Wärmetauscher und andererseits von Teilen des Gehäuses gebildet wird. Da der schräg angeordnete Wärmetauscher ferner mit seiner Querschnittskontur bis nahezu an einen Wirbelbildner des Querstromventilators heranragt oder ihn sogar berührt, liegt er extrem nahe am Querstromventilator, wobei der Querstromventilator überraschend dennoch eine seiner Baugröße entsprechende Luftförderleistung erbringt, sodass die Effektivität des Querstromventilators nicht eingeschränkt ist. Bei einem im Querschnitt rechteckigen Wärmetauscher reicht eine Eckkante vorzugsweise bis nahezu an den Wirbelbildner heran oder berührt diesen sogar. Durch die Schräglage des Wärmetauscher und die extrem nahe Zuordnung von Wärmetauscher und Wirbelbildner befindet sich das Laufrad des Querstromventilators - in vertikaler Richtung gesehen - in Überlappungsposition zum Wärmetauscher, wobei der Querstromventilator beziehungsweise sein Laufrad erheblich überlappt wird, also nicht nur leicht randseitig, sondern derart weitgehend, dass etwa die Hälfte oder auch etwas mehr als die Hälfte der im Querschnitt kreisförmigen Struktur des Laufrads des Querstromventilators überlappt ist. Die Überlappung kann dann über die Hälfte des Querschnitts des Querstromventilators hinaus gehen, wenn der Wirbelbildner nicht mittig, also nicht etwa auf Höhe der Drehachse des Laufrads angeordnet ist, sondern versetzt dazu. Die vorstehend erläuterte Konstruktion führt bei der lufttechnischen Einrichtung zu einer sehr geringen Bautiefe bei ebenfalls sehr geringer Bauhöhe, sodass ein Unterflureinsatz problemlos möglich ist und dennoch nur eine sehr schmale Luftgitterzone in Erscheinung tritt. Die Stellfläche des Raumes ist dementsprechend gegenüber den bekannten Ausführungsformen vergrößert. Dabei weist der Gegenstand der Erfindung gegenüber den bekannten Einrichtungen die gleiche Luftleistung sowie Kühlleistung beziehungsweise Heizleistung auf.This object is achieved by a trained as an underfloor ventilation device with the features of claim 1. Preferred embodiments are given in the dependent claims. In this case, the heat exchanger is arranged in such an inclined position in the housing that it in particular for the formation of at least one air space with its cross-sectional contour on the inner sides of a ceiling wall and a side wall of the Housing rests and that the heat exchanger protrudes with its cross-sectional contour to almost a vortex former or to the vortex former, the heat exchanger - seen in the vertical direction - the cross-flow fan considerably, in particular approximately half overlaps. The heat exchanger is therefore in an inclined position in the housing of the ventilation device, so it is neither lying nor standing upright arranged, but between these two positions. With its cross-sectional contour, it abuts at least on the inner sides of a ceiling wall, and a side wall and a bottom wall of the housing. If the heat exchanger has a rectangular cross-sectional contour, two corner edges of the heat exchanger touch the insides of the top wall and side wall. By the system, the interior of the housing is separated accordingly, so that an air space is formed, which is formed on the one hand by the heat exchanger and on the other hand by parts of the housing. Since the obliquely arranged heat exchanger furthermore projects with its cross-sectional contour almost to a vortex former of the cross flow fan or even touches it, it is extremely close to the cross flow fan, the cross flow fan surprisingly provides its size corresponding air flow capacity, so that the effectiveness of the cross flow fan is not limited. In the case of a heat exchanger which is rectangular in cross-section, a corner edge preferably extends almost to or even touches the vortex former. Due to the inclined position of the heat exchanger and the extremely close allocation of heat exchanger and vortex generator is the impeller of the cross flow fan - seen in the vertical direction - in overlapping position to the heat exchanger, the crossflow fan or its impeller overlaps significantly is so not only slightly marginal, but so much that about half or even slightly more than half of the circular cross-section structure of the impeller of the cross-flow fan is overlapped. The overlap can then go beyond half of the cross-section of the cross-flow fan, if the vortex generator is not centered, that is not arranged approximately at the height of the axis of rotation of the impeller, but offset. The construction described above leads to a very small overall depth in the ventilation system with very low overall height, so that an underfloor use is easily possible and yet only a very narrow air grid zone appears in appearance. The footprint of the room is therefore increased compared to the known embodiments. In this case, the object of the invention over the known devices, the same air flow and cooling capacity or heat output.

Nach einer Weiterbildung der Erfindung ist vorgesehen, dass der Wirbelbildner zumindest größtenteils oder nur von einem im Wesentlichen ebenen Flachelement, insbesondere ebenem Blech, gebildet ist. Dieses Flachelement oder Blech erstreckt sich vorzugsweise vertikal oder etwa vertikal. Aufgrund der geringen Abmessungen des Wirbelbildners - quer zum Flachelement gesehen - steht ein entsprechend großer Aufnahmeraum für den schräg angeordneten Wärmetauscher in diesem Bereich zur Verfügung, sodass er dementsprechend nahe zum Querstromventilator angeordnet werden kann.According to a development of the invention, it is provided that the vortex former is formed at least for the most part or only by a substantially planar flat element, in particular a flat sheet metal. This flat element or sheet metal preferably extends vertically or approximately vertically. Due to the small dimensions of the vortex generator - seen transversely to the flat element - is a correspondingly large receiving space for the obliquely arranged heat exchanger in this area available, so that it can be arranged accordingly close to the cross-flow fan.

Erfindungsgemäß ist vorgesehen, dass der Wärmetauscher mit seiner Querschnittskontur an der Innenseite an einer Bodenwand des Gehäuses anliegt. Dementsprechend erstreckt er sich zwischen Deckenwand und Bodenwand, wobei er diese beiden Wände berührt. Der Abstand von Deckenwand und Bodenwand gibt demzufolge den Schräglagewinkel des Wärmetauschers vor.According to the invention it is provided that the heat exchanger rests with its cross-sectional contour on the inside on a bottom wall of the housing. Accordingly, it extends between ceiling wall and bottom wall, touching these two walls. The distance from the ceiling wall and bottom wall therefore dictates the skew angle of the heat exchanger.

Ferner ist vorgesehen, dass das Gehäuse mindestens eine Lufteinlassöffnung und mindestens Luftauslassöffnung an seiner Deckenwand oder im Bereich der Deckenwand aufweist. Da die lufttechnische Einrichtung bevorzugt als Fußbodeneinbaugerät zum Einsatz kommt, liegen diese beiden Luftöffnungen an seiner Deckenwand und demzufolge im Bereich des Fußbodens des Raumes.Furthermore, it is provided that the housing has at least one air inlet opening and at least one air outlet opening on its ceiling wall or in the region of the ceiling wall. Since the ventilation device is preferably used as a floor installation device, these two air openings are on its ceiling wall and consequently in the floor space of the room.

Es ist vorteilhaft, wenn die Lufteinlassöffnung eine Umlufteinlassöffnung und wenn die Luftauslassöffnung eine Umluftauslassöffnung ist, d.h., die lufttechnische Einrichtung ist eine Umlufteinrichtung, die Raumluft ansaugt, Temperatur behandelt und dann wieder in den Raum zurückführt, aus dem sie die Luft angesaugt hat. Die Anordnung kann dabei derart getroffen sein, dass der Wärmetauscher die Lufteinlassöffnung oder die Luftauslassöffnung begrenzt. Ferner kann vorgesehen sein, dass der Wirbelbildner die Lufteinlassöffnung oder die Luftauslassöffnung begrenzt. Wie bereits erwähnt kann der Wärmetauscher eine rechteckige Querschnittskontur aufweisen, sodass er mit seinen Längskanten gegen die Innenseiten entsprechender Gehäusewände anliegt und mit einer derartigen Längskante auch eine entsprechende Luftöffnung begrenzt.It is advantageous if the air inlet opening is a recirculation inlet opening and if the air outlet opening is a circulating air outlet opening, i.e. the ventilation device is a recirculation device which draws in room air, treats the temperature and then returns it to the room from which it has sucked in the air. The arrangement can be made such that the heat exchanger limits the air inlet opening or the air outlet opening. Furthermore, it can be provided that the vortex former limits the air inlet opening or the air outlet opening. As already mentioned, the heat exchanger may have a rectangular cross-sectional contour, so that it rests with its longitudinal edges against the insides of corresponding housing walls and also limits a corresponding air opening with such a longitudinal edge.

Um eine möglichst geringe Gehäusetiefe zu bewirken, ist das Gehäuse - im Querschnitt gesehen - nicht rechteckig oder quadratisch gestaltet, sondern es vergrößert sich von oben nach unten gesehen. Oben ist es demzufolge weniger tief als weiter unten. Da jedoch nur der obere Bereich des Gehäuses im Fußboden in Erscheinung tritt, wirkt eine derartige Bauform besonders schmal in Bezug auf die Bautiefe.In order to achieve the smallest possible housing depth, the housing is - seen in cross-section - not rectangular or square, but it increases seen from top to bottom. As a result, it is less deep at the top than at the bottom. However, since only the upper portion of the housing appears in the floor, Such a design is particularly narrow in terms of depth.

Erfindungsgemäß ist vorgesehen, dass die Deckenwand des Gehäuses mit einer Längskante an eine schräge, die Gehäusebautiefe nach oben hin verkürzende Seitenwandzone des Gehäuses angrenzt. Dabei ist nur ein Bereich der Seitenwand, nämlich die erwähnte Seitenwandzone schräg stehend ausgebildet. An die untere Längskante der schrägen Seitenwandzone der Seitenwand schließt sich dann bevorzugt ein vertikaler Seitenwandabschnitt der Seitenwand an. Die gesamte Seitenwand ist demzufolge im oberen Bereich durch die schräg stehende Seitenwandzone und dem unteren Bereich durch den vertikal stehenden Seitenwandabschnitt gebildet.According to the invention, the ceiling wall of the housing adjoins an oblique side wall zone of the housing which shortens the housing depth at the top, with a longitudinal edge. In this case, only one region of the side wall, namely the mentioned side wall zone is formed obliquely. A vertical side wall section of the side wall then preferably adjoins the lower longitudinal edge of the oblique side wall zone of the side wall. The entire side wall is thus formed in the upper region by the inclined side wall zone and the lower region by the vertical side wall portion.

Erfindungsgemäß ist vorgesehen, dass der Wärmetauscher mit seiner Querschnittkontur an der Innenseite des vertikalen Seitenwandabschnitts anliegt. Mit Abstand zu ihm verläuft die schräge Seitenwandzone, sodass in diesem Bereich ein Ansaugraum/Luftstrom für die Raumluft zur Verfügung steht, d.h., diese tritt durch die Lufteinlassöffnung in diesen Ansaugraum ein und kann von dort aus dann großflächig den Wärmetauscher durchströmen.According to the invention it is provided that the heat exchanger rests with its cross-sectional contour on the inside of the vertical side wall portion. At a distance from it, the oblique side wall zone, so that in this area a suction / air flow for the room air is available, that is, enters through the air inlet opening in this suction and can then from there over a large area to flow through the heat exchanger.

Die Tiefe der Deckenwand des Gehäuses weist ein Maß von etwa 20 cm, vorzugsweise 20,5 cm auf. Die Gehäusehöhe ist derart gewählt, dass ein Fußbodeneinbau möglich ist. Die lufttechnische Einrichtung ist somit als Unterflurgerät, insbesondere Unterflur-Fassadengerät, ausgebildet. Der Begriff "Unterflur-Fassadengerät" deutet an, dass die lufttechnische Einrichtung im Fußboden eingebaut ist, und zwar in der Nähe der Fassade, also im Fensterbereich des Raumes.The depth of the ceiling wall of the housing has a dimension of about 20 cm, preferably 20.5 cm. The housing height is chosen so that a floor installation is possible. The ventilation device is thus designed as an underfloor device, in particular underfloor facade device. The term "underfloor façade unit" indicates that the ventilation system is installed in the floor, close to the façade, ie in the window area of the room.

Die Gehäusebauhöhe weist ein Maß von etwa 20 cm, vorzugsweise 18,5 cm, auf, sodass ein problemloser Einbau in einen aufgeständerten Fußboden oder in eine entsprechend andere Konstruktion des Fußbodens ermöglicht ist.The housing height has a dimension of about 20 cm, preferably 18.5 cm, so that a trouble-free installation in a raised floor or in a correspondingly different construction of the floor is possible.

Der Querstromventilator weist ein Laufrad auf, wobei der Wirbelbildner etwa mittig oberhalb des Laufrads, insbesondere etwa radial zu diesen, liegt. Wie erwähnt ist der Wirbelbildner bevorzugt als ebenes Flachelement, insbesondere ebenes Blech, ausgebildet. Es kann vorgesehen sein, dass der freie Endbereich des Flachelements, der in Richtung auf das Laufrad weist, im Querschnitt betrachtet, bogenförmig ausgestaltet ist. Hierdurch bildet der so gestaltete Bogen den geringsten Abstand zum Laufrad, nicht also die Endkante des Flachelements.The cross-flow fan has an impeller, wherein the vortex generator is approximately centrally above the impeller, in particular approximately radially to the latter. As mentioned, the vortex former is preferably designed as a planar flat element, in particular a flat sheet metal. It can be provided that the free end region of the flat element, which points in the direction of the impeller, viewed in cross section, is designed arcuate. As a result, the arc thus formed forms the smallest distance to the impeller, not the end edge of the flat element.

Eine Weiterbildung der Erfindung sieht vor, dass Lufteinlassöffnung und Luftauslassöffnung von einem gemeinsamen Luftgitter abgedeckt sind. Ferner ist vorgesehen, dass die Seitenwandzone parallel oder etwa parallel zu einer Eintrittsfläche und/oder zu einer Austrittsfläche des Wärmetauschers verläuft. Mithin weist der Schräglagenwinkel des Wärmetauschers etwa die gleiche Größe auf, wie der Schräglagenwinkel der Seitenwandzone.A development of the invention provides that the air inlet opening and the air outlet opening are covered by a common air grid. It is further provided that the side wall zone runs parallel or approximately parallel to an inlet surface and / or to an outlet surface of the heat exchanger. Thus, the bank angle of the heat exchanger is about the same size as the bank angle of the sidewall zone.

Die Zeichnungen veranschaulichen die Erfindung anhand eines Ausführungsbeispiels und zwar zeigt:

Figur 1
eine perspektivische Ansicht einer als Unterflurgerät ausgebildeten lufttechnischen Einrichtung,
Figur 2
eine Draufsicht auf die lufttechnische Einrichtung der Figur 1,
Figur 3
eine Seitenansicht der lufttechnischen Einrichtung der Figur 1,
Figur 4
eine Stirnansicht der lufttechnischen Einrichtung der Figur 1 und
Figur 5
eine Schnittansicht durch die lufttechnische Einrichtung gemäß der Pfeile V-V in Figur 3.
The drawings illustrate the invention with reference to an embodiment and shows:
FIG. 1
a perspective view of an underfloor device formed ventilation device,
FIG. 2
a plan view of the ventilation device of the FIG. 1 .
FIG. 3
a side view of the ventilation device of FIG. 1 .
FIG. 4
an end view of the ventilation device of the FIG. 1 and
FIG. 5
a sectional view through the ventilation device according to the arrows VV in FIG. 3 ,

Die Figur 1 zeigt eine lufttechnische Einrichtung 1, die als Umlufteinrichtung 2, insbesondere als Umluftfancoil-Gerät 3, ausgebildet ist. Die lufttechnische Einrichtung 1 bildet ein Bodengerät 4, das im Fußboden eines zu klimatisierenden Raumes 5 (Figur 5) derart eingesetzt wird, dass die Oberseite mit dem Fußboden des Raumes 5 fluchtet. Vorzugsweise wird die lufttechnische Einrichtung entlang einer Fassade des Raumes 5, also im Fensterbereich oder dergleichen, angeordnet.The FIG. 1 shows an air-technical device 1, which is designed as a recirculation device 2, in particular as Umluftfancoil device 3. The ventilation device 1 forms a floor unit 4, which in the floor of a room to be air-conditioned 5 ( FIG. 5 ) is used such that the top is flush with the floor of the room 5. The ventilation device is preferably arranged along a facade of the room 5, that is to say in the window area or the like.

Die lufttechnische Einrichtung 1 weist ein Gehäuse 6 auf, das eine Deckenwand 7, eine aus der Figur 1 nicht ersichtliche Bodenwand 8 hat sowie vier Seitenwände 9, 10, 11 und 12 besitzt. Die Deckenwand 7 ist mit einem Luftgitter 13 versehen. Die Seitenwände 11 und 12 bilden Stirnwände, die vertikal verlaufen und von dem Luftgitter 13 ein Stück weit überragt werden. Auch die vertikal verlaufende Seitenwand 10 wird von dem Luftgitter 13 etwas überragt. Die Seitenwand 9 setzt sich aus einer schräg verlaufenden Seitenwandzone 14 und einem vertikalen Seitenwandabschnitt 15 zusammen. Die Deckenwand 7 grenzt mit einer Längskante 16 an die schräge, die Gehäusebautiefe nach oben hin verkürzende Seitenwandzone 14 an und eine untere Längskante 17 der Seitenwandzone 14 grenzt an den vertikalen Seitenwandabschnitt 15 an. Eine obere Längskante 18 der Seitenwandzone 14 wird geringfügig von dem Luftgitter 13 überragt.The ventilation device 1 has a housing 6, which has a top wall 7, one of the FIG. 1 not apparent bottom wall 8 has and four side walls 9, 10, 11 and 12 has. The ceiling wall 7 is provided with an air grid 13. The side walls 11 and 12 form end walls which extend vertically and are surmounted by the air grille 13 a bit far. The vertically extending side wall 10 is slightly surmounted by the air grille 13. The side wall 9 is composed of a sloping side wall zone 14 and a vertical side wall section 15. The ceiling wall 7 adjoins with a longitudinal edge 16 at the oblique, the housing depth upwardly shortening side wall zone 14 and a lower longitudinal edge 17 of the sidewall zone 14 adjacent to the vertical side wall portion 15 at. An upper longitudinal edge 18 of the sidewall zone 14 is slightly surmounted by the grille 13.

Die Aufstellung der lufttechnischen Einrichtung 1 erfolgt mit höhenverstellbaren Füßen 19, die an Flanschstreifen 20 im Bereich der Seitenwände 11 und 12 angeordnet sind. Erfolgt die Aufstellung mit den Füßen auf einem Rohfußboden des Raumes 5, so kann die lufttechnische Einrichtung 1 mittels der Höhenverstellbarkeit derart justieren, dass das Luftgitter 13 mit dem Fußboden, beispielsweise aufgestelzten Fußboden, des Raumes 5 fluchtet. Befestigungslaschen 21 erlauben ein Festelegen der lufttechnischen Einrichtung 1 in gewünschter Position.The installation of the ventilation device 1 is carried out with height-adjustable feet 19, which are arranged on Flanschstreifen 20 in the region of the side walls 11 and 12. If the installation with the feet on a bare floor of the room 5, the ventilation device 1 can adjust by means of height adjustment such that the grille 13 with the floor, for example, stilted floor, the room 5 is aligned. Fastening tabs 21 allow a fixing of the ventilation device 1 in the desired position.

Die Figuren 1, 2, 3 und 4 verdeutlichen, dass sich das Luftgitter 13 über die gesamte Oberseite der lufttechnischen Einrichtung 1 erstreckt, wobei es eine Lufteinlassöffnung 22 und eine Luftauslassöffnung 23 abdeckt. Lufteinlassöffnung 22 und Luftauslassöffnung 23 erstrecken sich etwa über Dreiviertel des Maßes der Gerätelänge I. Im verbleibenden Bereich sind der Antriebsmotor eines sich im Innern des Gehäuses 6 untergebrachten Querstromventilators 24 und eine Wasseranschlusseinrichtung für einen sich im Innern des Gehäuses 6 befindlichen Wärmetauschers 25 angeordnet.The FIGS. 1 . 2 . 3 and 4 illustrate that the grille 13 extends over the entire top of the HVAC device 1, covering an air inlet opening 22 and an air outlet opening 23. Air inlet opening 22 and air outlet 23 extend over about three quarters of the extent of the device length I. In the remaining area of the drive motor of a housed inside the housing 6 cross-flow fan 24 and a water connection means for a located in the interior of the housing 6 heat exchanger 25 are arranged.

Gemäß Figur 5 weist der Wärmetauscher 25 eine rechteckige Querschnittskontur mit den Eckkanten 27, 28, 29 und 30 auf. Der Wärmetauscher 25 besitzt eine Eintrittsfläche 31 und eine Austrittsfläche 32.According to FIG. 5 the heat exchanger 25 has a rectangular cross-sectional contour with the corner edges 27, 28, 29 and 30. The heat exchanger 25 has an entry surface 31 and an exit surface 32.

Die Anordnung ist nun derart getroffen, dass der Wärmetauscher 25 derart in Schräglage im Gehäuse 6 angeordnet ist, dass er mit seiner Eckkante 17 gegen die Innenseite 33 der Deckenwand 7 und mit seiner Eckkante 28 gegen die Innenseite 34 der Seitenwand 9, nämlich der Innenseite 34 des Seitenwandabschnitts 15 stößt, sodass hierdurch im Innern des Gehäuses 6 ein Luftraum 35 abgegrenzt wird, der der Luftzuführung zum Wärmetauscher 25 dient. Hierauf wird nachstehend noch näher eingegangen. Die Eckkante 29 des Wärmetauschers 25 liegt gegen die Innenseite 36 der Bodenwand 8 an. Die Eintrittsfläche 31 des Wärmetauschers 25 verläuft etwa parallel zur Ebene der Seitenwandzone 14. Die Lufteinlassöffnung 22, die eine Umlufteinlassöffnung 37 bildet, erstreckt sich zwischen der Längskante 16 und der Eckkante 27.The arrangement is now made such that the heat exchanger 25 is arranged in an inclined position in the housing 6, that he with its corner edge 17 against the inside 33 of the ceiling wall 7 and with its corner edge 28 against the inner side 34 of the side wall 9, namely the inner side 34 of the side wall portion 15 abuts, so that thereby an air space 35 is delimited in the interior of the housing 6, which serves the air supply to the heat exchanger 25. This will be discussed in more detail below. The corner edge 29 of the heat exchanger 25 abuts against the inner side 36 of the bottom wall 8. The inlet surface 31 of the heat exchanger 25 extends approximately parallel to the plane of the side wall zone 14. The air inlet opening 22, which forms a recirculation inlet opening 37, extends between the longitudinal edge 16 and the corner edge 27.

An der Deckenwand 7 des Gehäuses 6 ist ein Wirbelbildner 38 des Querstromventilators 24 befestigt. Der Wirbelbildner 38 wird im Wesentlichen von einem ebenen Flachelement 39, insbesondere einem ebenen Blech, gebildet, wobei sich das Flachelement 39 zu einer Drehachse 40 eines Laufrads 41 des Querstromventilators 24 etwa radial und - senkrecht betrachtet - auf Höhe der Drehachse 40 erstreckt. Eine freie Endkante 42 des Wirbelbildners 38 kann in der Ebene des Flachelements 39 liegen, so wie dies mit durchgezogener Linie aus der Figur 5 hervorgeht. Alternativ kann vorgesehen sein, dass der Wirbelbildner 38 eine abgewinkelte Endzone aufweist, so wie dies mit gestrichelter Linie 43 in Figur 5 angedeutet ist.On the top wall 7 of the housing 6, a vortex generator 38 of the cross-flow fan 24 is attached. The vortex former 38 is essentially formed by a planar flat element 39, in particular a flat sheet metal, wherein the flat element 39 extends approximately radially and, when viewed perpendicularly, to a rotational axis 40 of an impeller 41 of the crossflow fan 24 at the level of the rotational axis 40. A free end edge 42 of the vortex generator 38 can lie in the plane of the flat element 39, as it is with a solid line from the FIG. 5 evident. Alternatively, it can be provided that the vortex former 38 has an angled end zone, as indicated by dashed line 43 in FIG FIG. 5 is indicated.

Die Anordnung ist von derart getroffen, dass sich die Eckkante 30 des Wärmetauschers 25 bis nahezu an den Wirbelbildner 38 heranerstreckt. Alternativ kann auch vorgesehen sein, dass die Eckkante 30 den Wirbelbildner 38 berührt. Hierdurch liegen Wärmetauscher 25 und Querstromventilator 24 - in horizontaler Richtung gesehen - sehr eng beieinander, d.h., es besteht entweder kein oder ein sehr geringer Abstand a zwischen Eckkante 30 und Wirbelbildner 38 sowie ein sehr kleiner Abstand b zwischen dem Laufrad 41 des Querstromventilators 24 und dem Wärmetauscher 25, insbesondere der Austrittsfläche 32 des Wärmetauschers 25. Dennoch hat sich herausgestellt, dass die Luftförderleistung, Heizleistung und Kühlleistung der lufttechnischen Einrichtung 1 nicht beeinträchtigt ist.The arrangement is made such that the corner edge 30 of the heat exchanger 25 extends almost to the vortex former 38. Alternatively, it can also be provided that the corner edge 30 touches the vortex former 38. As a result, are heat exchanger 25 and cross-flow fan 24 - seen in the horizontal direction - very close to each other, ie, there is either no or a very small distance a between corner edge 30 and vortex generator 38 and a very small distance b between the impeller 41 of the cross flow fan 24 and the heat exchanger 25, in particular the outlet surface 32 of the heat exchanger 25. Nevertheless, it has been found that the air flow rate, heating capacity and cooling capacity of the ventilation device 1 is not impaired.

Da der Wärmetauscher 25 die erwähnte Schräglage im Gehäuse 6 einnimmt, überlappt er - in vertikaler Richtung gesehen - mit seiner oberen Zone 44 das Laufrad 41 des Querstromventilators 24. Die Anordnung ist vorzugsweise derart getroffen, dass er das Laufrad 41 etwa bis zur Hälfte überlappt.Since the heat exchanger 25 assumes the aforementioned inclined position in the housing 6, it overlaps - seen in the vertical direction - with its upper zone 44, the impeller 41 of the cross flow fan 24. The arrangement is preferably made such that it overlaps the impeller 41 about halfway.

Aufgrund der vorstehend beschriebenen und aus den Figuren hervorgehenden Konstruktion ergibt sich eine lufttechnische Einrichtung 1, die durch extrem kleine Abmessungen gekennzeichnet ist. So beträgt die Höhe h des Gehäuses 6 nur 18,5 cm. Die Tiefe t des Gehäuses 6 beträgt im Bereich des Luftgitters 13 nur 20,5 cm. Im Bereich der Bodenwand 38 beträgt die Tiefe T des Gehäuses 24,15 cm. Da diese größere Gehäusetiefe T gegenüber der oberen, schmaleren Gehäusetiefe t jedoch im Fußboden des Raumes 5 liegt, tritt nur die schmale Gehäusetiefe t optisch in Erscheinung.Due to the above-described and resulting from the figures construction results in a ventilation device 1, which is characterized by extremely small dimensions. Thus, the height h of the housing 6 is only 18.5 cm. The depth t of the housing 6 is in the region of the air grille 13 only 20.5 cm. In the area of the bottom wall 38, the depth T of the housing is 24.15 cm. However, since this larger housing depth T is in the floor of the room 5 with respect to the upper, narrower housing depth t, only the narrow housing depth t appears optically.

Es ergibt sich folgende Funktion: Raumluft 45 des Raumes 5 wird durch die Umlufteinlassöffnung 37 in den Luftraum 35 aufgrund der Saugwirkung des Querstromventilators 24 angesaugt und durchsetzt den Wärmetauscher 25, der mittels eines nicht dargestellten Wasserkreislaufs entweder zum Aufheizen der Raumluft 45 oder zum Kühlen der Raumluft 45 dient. Entsprechend wärmebehandelte Raumluft 45 tritt aus der Austrittsfläche 32 des Wärmetauschers 25 aus, durchsetzt das Laufrad 41 des Querstromventilators 24 und strömt aus der Luftauslassöffnung 23 aus und damit wieder in den Raum 5 zurück. Insgesamt liegt daher ein Umluftbetrieb vor. Die Luftauslassöffnung 23 ist als Umluftauslassöffnung 46 ausgebildet. Sie wird von dem Wirbelbildner 38 und der Seitenwand 10 beziehungsweise die entsprechende Seitenkante des Luftgitters 13 begrenzt. This results in the following function: room air 45 of the room 5 is sucked through the recirculation inlet opening 37 into the air space 35 due to the suction effect of the crossflow fan 24 and passes through the heat exchanger 25, by means of a water cycle, not shown, either for heating the room air 45 or for cooling the room air 45 serves. Correspondingly heat-treated room air 45 exits from the outlet surface 32 of the heat exchanger 25, passes through the impeller 41 of the cross-flow fan 24 and flows out of the air outlet 23 and thus back into the room 5 back. Overall, therefore, there is a recirculation mode. The air outlet opening 23 is designed as Umluftauslassöffnung 46. It is bounded by the vortex former 38 and the side wall 10 and the corresponding side edge of the air grille 13.

Claims (9)

  1. A ventilation device (1), in particular an air recirculation device (2), configured as an underfloor unit, having a housing (6) in which a cross-flow fan (24) provided with a swirl diffuser (38) and a heat exchanger (25) are arranged, wherein the housing (6) has a ceiling wall (7), a bottom wall (8) as well as four side walls (9, 10, 11, 12), the ceiling wall (7) is provided with an air grid (13), three of the side walls (10, 11, 12) extend vertically and are surpassed by the air grid (13) by a small distance, the fourth side wall (9) is comprised of an inclined side wall zone (14) and a vertical side wall portion (15), the ceiling wall (7) borders with a longitudinal edge (16) the inclined side wall zone (14) that shortens the constructional depth of the housing in the upwards direction, a lower longitudinal edge (17) of the side wall zone (14) borders the vertical side wall portion (15), and an upper longitudinal edge (18) of the side wall zone (14) is slightly surpassed by the air grid (13), wherein the heat exchanger (25) is arranged in the housing (6) in such an inclined position that it abuts with its cross-section contour (26) against the inner sides (33, 34, 36) of the ceiling wall (7), the vertical side wall portion of the fourth side wall (9) and the bottom wall (8) of the housing (6), and almost reaches the swirl diffuser (38) or reaches the swirl diffuser (38) with its cross-section contour (26), wherein the side wall zone (14) extends in parallel or approximately in parallel with an entry surface (31) and/or with an exit surface (32) of the heat exchanger (25), and wherein, seen in the vertical direction, the heat exchanger (25) overlaps the cross-flow fan (24) approximately halfway, and the housing depth (t, T) of the housing (6) enlarges from the top towards the bottom, the depth (t) of the ceiling wall (7) has a measure of about 20 cm, preferably 20.5 cm, and the construction height (h) of the housing has a measure of about 20 cm, preferably 18.5 cm, and wherein the housing (6) has at least one air inlet opening (22) and at least one air outlet opening (23), each arranged in its ceiling wall (7).
  2. The ventilation device according to claim 1, characterised in that the swirl diffuser (38) consists at least in large parts or exclusively of an essentially planar flat element (39), in particular a planar metal sheet.
  3. The ventilation device according to any one of the preceding claims, characterised in that the air inlet opening (22) is an air recirculation inlet opening (37) and that the air outlet opening (23) is an air recirculation outlet opening (46).
  4. The ventilation device according to any one of the preceding claims, characterised in that the heat exchanger (25) delimits the air inlet opening (22) or the air outlet opening (23).
  5. The ventilation device according to any one of the preceding claims, characterised in that the swirl diffuser (38) delimits the air inlet opening (22) or the air outlet opening (23).
  6. The ventilation device according to any one of the preceding claims, characterised in that the heat exchanger (25) has a rectangular cross-section contour (26).
  7. The ventilation device according to any one of the preceding claims, characterised in that it is configured as an underfloor facade unit.
  8. The ventilation device according to any one of the preceding claims, characterised in that the cross-flow fan (25) has an impeller (41) and that the swirl diffuser (38) is situated approximately centrally above the impeller (41), in particular approximately radially with respect thereto.
  9. The ventilation device according to any one of the preceding claims, characterised in that the air inlet opening (22) and the air outlet opening (23) are covered by a common air grid (13).
EP08001102.6A 2007-02-17 2008-01-22 Compact indoor unit for under-floor installation Active EP1959205B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007007928A DE102007007928A1 (en) 2007-02-17 2007-02-17 Air conditioning device

Publications (3)

Publication Number Publication Date
EP1959205A2 EP1959205A2 (en) 2008-08-20
EP1959205A3 EP1959205A3 (en) 2010-11-17
EP1959205B1 true EP1959205B1 (en) 2018-05-02

Family

ID=39469443

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08001102.6A Active EP1959205B1 (en) 2007-02-17 2008-01-22 Compact indoor unit for under-floor installation

Country Status (2)

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EP (1) EP1959205B1 (en)
DE (1) DE102007007928A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009030114B4 (en) 2009-06-22 2011-03-31 Heiner Andersen air conditioning
DE102009053527B4 (en) 2009-11-18 2014-04-03 Heiner Andersen air conditioning

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2039564A5 (en) * 1969-04-09 1971-01-15 Bull General Electric
US4733543A (en) * 1986-12-05 1988-03-29 Enviromaster International Corporation Packaged air conditioner
JP2627301B2 (en) * 1988-04-11 1997-07-02 三洋電機株式会社 Heat exchange unit
JP2686105B2 (en) * 1988-09-05 1997-12-08 三洋電機株式会社 Heat exchange unit
DE202004003427U1 (en) * 2004-03-05 2004-05-13 Ltg Aktiengesellschaft Climate control device, includes heat exchanger connected via air transport device to outlet for air supplied to room
DE102004010738A1 (en) * 2004-03-05 2005-09-22 Ltg Aktiengesellschaft Air-conditioning device for heating, cooling and / or ventilating a room and corresponding method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP1959205A2 (en) 2008-08-20
DE102007007928A1 (en) 2008-08-21
EP1959205A3 (en) 2010-11-17

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