DK179084B1

DK179084B1 - A roof window system comprising a ventilation assembly and method of operating such a ventilation assembly

Info

Publication number: DK179084B1
Application number: DKPA201370147A
Authority: DK
Inventors: Per Jacobsen; Brent Møller; Kaj Isaksen; Artur Slupinski
Original assignee: Vkr Holding As
Priority date: 2013-03-12
Filing date: 2013-03-12
Publication date: 2017-10-16
Also published as: ES2730625T3; DK2784240T3; EP2784240A2; PL2784240T3; DK201370147A; EP2784240A3; EP2784240B1

Abstract

The roof window (1) has a frame (2) defining a frame plane, and a sash (3). The roof window (1) forms part of a roof window system further comprising a ventilation assembly (100). The ventilation assembly (100) is adapted to be connected to a ventilation device of the roof window (1).

Description

A roof window system comprising a ventilation assembly and method of operating such a ventilation assembly

The present invention relates to a roof window system comprising a roof window having at least one frame defining a frame plane and including a pane, the roof window further comprising a ventilation device connected to a frame member and adapted for providing ventilation of a building in which the roof window is mounted, and a ventilation assembly comprising at least one ventilation unit including a ventilator, the at least one ventilation unit being adapted to be connected to the ventilation device of the roof window. The invention furthermore relates to a method of operating the ventilation assembly in the roof window.

One of the primary functions in a window, besides admitting light, is to allow stale, warm, or otherwise used or spent air inside the building to exit and allowing fresh air from the exterior to enter the building in which the window is installed. This presupposes that the window is openable. Over time, the provision of ventilation in windows, also in situations in which the window is not open, either because it is a fixed window, or simply is not open, has become more or less standard equipment. This is the result of, among other things, increased focus on improving indoor climatic conditions and the microclimate in buildings. One example of a roof window providing a ventilating aperture is the well-known VELUX® with a ventilation flap, which in pivot-hung windows also fulfils the double function of operating the window. In such a pivot-hung window, the ventilation flap thus has three positions, viz. a first and closed position, in which the window is closed and no ventilation is provided, a second position, in which the ventilation flap allows passage of air to and from the building, and a third position, in which the window may be operated. Other examples of ventilation devices are shown in for instance DK176947B1.

Natural ventilation provided by such a ventilation device has a number of advantages. Among others, it is free of charge and noise-less. However, in certain fields of applications, for instance mechanical ventilation may be desirable.

Examples of prior art roof window systems, including roof windows and ventilation assemblies, are shown in for instance Applicant’s European patents EP0458725B1 and EP0372597B1, and in published Danish patent application DK200001472A.

Other examples are shown in documents DE102004037563A1, DE202004020630U1, DE19811469A1 and DE2906729U1.

Although many of the above-mentioned prior art roof window systems, roof windows and ventilation assemblies provide well-functioning solutions, they also require that the roof window is built to receive such a ventilation assembly, typically by designing special parts and/or requiring further investment in the installation of auxiliary parts and installation equipment. Thus, severe limitations as to retro-fitting existing windows exist.

It is therefore an object of the present invention to provide a roof window system, which provides for increased flexibility and ease of installation and use.

It is a further object to provide a roof window system which makes it possible to reduce the overall energy consumption of the building.

It is a still further object to provide a roof window system, in which operation of the ventilation assembly is facilitated.

In a first aspect, these and further objects are achieved with a roof window system of the kind mentioned in the introduction, in which the ventilation assembly comprises a housing having predefined dimensions and accommodating said ventilation unit or units, and that each ventilation unit includes a set of flow channels, and a set of transition channels having a first connecting end connected, in a mounted condition, to the set of flow channels and a second connecting end connected, in the mounted condition, to the ventilation device of the roof window.

Thereby a roof window system is provided, with which the flexibility and ease of installation aimed at are achieved.

In a second aspect, a method of operating the ventilation assembly is provided.

Further presently preferred embodiments and further advantages will be apparent from the following detailed description and the appended dependent claims.

The invention will be described in more detail below by means of a non-limiting example of an embodiment and with reference to the schematic drawing, in which

Fig. 1 shows a perspective view of a roof window system according to the invention mounted in a roof;

Fig. 2 shows a partial plan view of an embodiment of a roof window system comprising a roof window and a ventilation assembly according to the invention, with some parts removed, seen from above or outside;

Fig. 3 shows a plan view of a detail of the ventilation assembly of the embodiment shown in Fig. 2;

Fig. 4 shows a partial plan view of details of the roof window and ventilation assembly of the embodiment shown in Fig. 2;

Fig. 5 shows a partial perspective view, on a larger scale, of the details shown in Fig. 4;

Fig. 6 shows a partial plan view, on a larger scale, of the details shown in Fig. 4;

Fig. 7 shows a partial perspective view, on a still larger scale, of the details shown in Figs 4, 5 and 6;

Figs 8 and 9 show perspective views of details of the ventilation assembly in the embodiment shown in Figs 2 to 7, seen from the side of the roof window;

Figs 10 and 11 show plan views, seen from below;

Fig. 12 shows a perspective view of one of the details of Figs 8 to 11, seen from the side facing away from the roof window;

Fig. 13 shows a perspective view of the detail of Fig. 12, seen from the side facing the roof window;

Fig. 14 shows a schematic cross-sectional view of the roof window system in an embodiment of the invention; and

Figs 15 and 16 shows schematic perspective views of a detail of the ventilation assembly in an embodiment of the invention, in two different operational conditions.

Referring first to Figs 1,14 and 15-16 showing the overall appearance and principles underlying a roof window system in an embodiment of the invention, the roof window system comprises a roof window 1 and a ventilation assembly generally designated 100.

The roof window 1 comprises at least one frame, in the embodiment shown and described two frames, of which one frame 2 is a stationary frame and an openable sash 3 encasing a pane 4. The frame 2 is, in a manner known perse, substantially rectangular and has a top member, and further a bottom member and two side members, not shown in detail, and the sash 3 has a top member, and further a bottom member and two side members, not shown in detail.

The frame 2 is adapted to be built into a roof structure of virtually any kind, typically comprising a number of rafters and battens, and further non-shown details such as vapour barrier collars etc., below a roofing material 200, here in the form of tiles.

In the embodiment shown, the window is centre-hung in that the sash 3 is connected to the frame 2 by a pivot hinge (not shown) provided between side members of the frame 2 and sash 3, respectively, to be openable by tilting the sash 3 of the window 1 about a pivot hinge axis defined by the pivot hinge. The pivot hinge comprises two parts, namely a sash part and a frame part. The hinges used are preferably of the type described in the applicant's earlier patent applications W09928581 and GB1028251, where a curved member and a tap on one hinge part travels in a curved guide track in the other during opening and closing of the window. The radius of curvature entails that when using such hinges, the hinge axis lies at a small distance above the actual hinge parts and as the sash frame is turned first the curved member and then the tap comes out of the track. In combination this provides a pattern of movement which allows easy operation of a centre-hung window and allows the sash frame to be turned substantially entirely around.

As used in this description, a closed position of the roof window 1 means a position in which the frame plane and the sash plane coincide, that is form an angle of 0 degrees with each other. Similarly an open position of the roof window 1 as used herein generally means a position in which the sash 3 is tilted about the pivot hinge axis such that the frame plane and the sash plane no longer coincide. Notwithstanding the centre-hung roof window described, the window according to the invention may in other embodiments be top-hung, with or without an intermediate frame structure, have the hinge axis somewhere between the top and the centre, be side-hung or for that matter even be bottom-hung, or fixed, i.e. not openable.

The sash 3 and frame 2 of the window according to the invention may be made of wooden members or members made of cast or extruded polyurethane (PUR).

In the installed position, the frame 2 and sash 3 are protected, in a manner known perse, by cover elements, of which a cladding is generally designated 50, a bottom flashing member 60 and a top flashing member 70 (cf. Fig. 14). Towards the interior, a suitable finishing may be provided, for instance comprising a lining 80.

The roof window 1 has a ventilation device, which in the embodiment shown comprises a ventilation flap 40, which is connected to the top member of the sash 3 via a hinge connection 41 and which furthermore comprises a handle 42. The ventilation flap 40 is an elongate element, which is connected to the top sash member by means of the hinge connection 41 and furthermore to a lock not shown by means of another hinge connection adapted to enable the ventilation flap 40 to be placed in at least two, and preferably at least three, different positions including a closed and at least one open position. To this end the lock may for instance be a spring biased locking mechanism. Two locks may be provided, or only one lock or for that matter more than two locks may also be provided. As described in Applicant’s international application No. PCT/DK2012/050371 (not yet published), a top sash module may be provided in the sash top member.

Operating the handle 42 rotates the ventilation flap 40 from an open position to a closed position and vice versa. One or more intermediate positions, in which the ventilation flap 40 may be temporarily locked, may be defined between the open and closed position. In the embodiment shown and described, the sash 3 is pivotally connected to the frame 2, and the ventilation flap 40 is adapted to assume three position, viz. a first or closed position, in which the roof window 1 is closed and no ventilation is provided, a second and ventilating position, in which the roof window 1 is still closed but a ventilation aperture is provided to allow air passage, and a third and entirely open position, in which the sash 3 is able to pivot relative to the frame 2 to open the window. Activation of the ventilation assembly 100 thus takes place simply by operating the handle 42 of the ventilation flap 40, which in the embodiment shown forms part of a ventilation device of the window 1. In other windows, for instance a top-hung roof window, the ventilation flap 40 may be able to assume only two position, viz. a closed position and an open, ventilating position, whereas operation of the sash takes place in other ways, for instance by a handle or other operating means located at the bottom member of the sash.

The roof window 1 of the invention forms part of a roof window system, which in addition to the roof window 1 comprises a ventilation assembly generally designated 100. In the embodiment shown, the ventilation assembly 100 is positioned substantially in the plane of the frame 2 and the sash 3 of the roof window 1, above the top member of the window frame 2 as seen in the inclination of the roof.

Details of an embodiment of the ventilation assembly 100 will now be described in further detail with particular reference to Figs 2 to 13.

The ventilation assembly 100 comprises a housing 150 having predefined dimensions and accommodating two ventilation units 110,120. Each ventilation unit includes a set of flow channels 1511,1512,1521,1522, and a set of transition channels 1611 (only shown in respect of one element) having a first connecting end for connection to the set of flow channels and a second connecting end adapted to be connected to the ventilation device of the roof window.

The ventilation assembly 100 comprises a housing 150 having predefined dimensions, namely a predefined width, a predefined length and predefined height. The housing 150 is divided in the height direction into a bottom part 1501 and a top part 1502. In the length direction, the housing 150 is divided into a left-hand part and a right-hand part, which in the embodiment shown are integral with each other. Each of the left-hand and right-hand parts accommodates a respective ventilation unit 110 and 120. As indicated in Fig. 5, each ventilation unit 110 and 120 has a respective ventilator 130,140, which in turn is provided with a power supply and activation means (not shown).

In the preferred embodiment, the predefined dimensions of the housing 150 including the predefined width, length and height, are chosen such that the width does not exceed or at most corresponds to the width of the window, and the height does not exceed or at most corresponds to the height of the window. Furthermore, the housing 150 of the ventilation assembly 100 is located substantially in the plane of the frame and sash. This makes it possible to provide a ventilation assembly which is inconspicuous and easy to install, as the same aperture in the roof may be utilised, for instance simply by removing one or more rows of tile above the window. No penetration of the underlying vapour barrier collar is necessary, just as the provision of cover members is made easy. Consequently, flashing members fitting the roof window 1 may be provided, just with an extra length as compared to the flashing fitting the window itself to accommodate the ventilation assembly 100 as well. In a corresponding manner, the top flashing member 70 may simply be transferred and reused from the top of the roof window 1 to the top of the ventilation assembly 100. The top casing of the roof window 1 is simply removed and replaced by the lower-most portion of a cover part of the ventilation assembly 100, or be provided with extension pieces to be coupled to the cover members of the frame. The provision of such cover parts is evident to a person skilled in the art.

The set of flow channels 1511,1512,1521,1522 is formed by channel parts in the respective bottom and top parts 1501,1502 together with the ventilation units (110,120) in a mounted condition. A recess 1510 (cf. Fig. 3, showing the recess 1510 in the top part 1502) is formed in the housing 150 to accommodate the ventilation units 110,120.

The lower-most (seen in the direction of the inclination of the roof when the roof window system is installed) flow channels 1511,1521 of the set of flow channels are adapted to be connected to a set of transition channels 1611, respectively, having a first connecting end for connection to the set of flow channels and a second connecting end adapted to be connected to the ventilation device of the roof window.

The sets of transition channels 1611 are formed in a respective transition element 161,162, which in the embodiment shown is provided as a separate element from the remaining parts of the ventilation assembly 100, which provides for a particularly easy installation. The transition elements 161, 162 may for instance be made from a plastic material or other insulating material to avoid the formation of cold bridges.

The set of transition channels 1611 in one transition element 161 comprises three apertures at the first connecting end for connection to the set of flow channels 1511, and two apertures at the second connecting end adapted to be connected to the ventilation device of the roof window 1. As shown most clearly in Fig. 13, the apertures at the second connecting end are provided with inclined or arched plates 1612. The presence of three apertures at the first connecting end in the embodiment shown allows for accommodation of parts of the window, such as the lock case (typically in the case of wide windows having two lock cases) or positioning means in the form of barrel bolts.

In the embodiment shown in Figs 1 to 13, the ventilation takes place via openings in the frame 2 of the roof window 1. However, it is also possible to provide the ventilation to flow channels above the frame 2, and/or via the sash 3.

Referring again to Figs 14, 15 and 16, a preferred embodiment of the invention will be described in more detail. In this embodiment, the ventilation assembly 100 comprises two ventilation units 110, 120, and each ventilation unit comprises a heat exchange device in the form of a regenerator. Reference in that regard is made to documents WO 2012/025122 A1 and WO 2012/155913 A1.

The flow direction is switched at intervals, either in response to a preset pattern or to predefined values measured for instance by sensors. In order to make the switch, each ventilator 130, 140 is pivotally journalled in the ventilation unit 110, 120 to switch the flow direction in the respective set of flow channels 1511, 1512 and 1521, 1522. In addition to securing that the temperature in the individual ventilation units is utilized to a maximum, the switch entails that the pressure inside the room is kept substantially constant, without creating either an overpressure or an underpressure. The switch in the flow direction of the respective ventilators may be controlled in such a way that the ventilators blow in opposite directions, but it is also conceivable to let the ventilators blow in the same direction to increase the flow. A cycle of 30 seconds in each direction is typical, but other intervals may apply. The control may also be performed manually.

Once the roof window system including the roof window 1 and the ventilation assembly 100 is mounted, the ventilation assembly 100 may be operated to perform the desired ventilation. This is carried out by the following steps: providing the ventilation assembly with activation means, connecting the ventilation unit or units to the ventilation device of the roof window, and activating the ventilation assembly by operating the ventilation device. In the preferred embodiment, the step of activating the ventilation assembly is carried out by bringing the ventilation flap 40 from a first to a second position, and de-activated by bringing the ventilation flap 40 from the second to the first position. Preferably from the second to the first or to a third position, in case the roof window 1 is a centre-hung or pivot window, of which the ventilation flap 40 also fulfils the function of an operator.

In the cases, in which the ventilation assembly comprises two ventilation units, and wherein each ventilation unit comprises a heat exchange device, preferably a regenerator, and the ventilator is pivotally journalled in the ventilation unit, the flow direction in the set of flow channels is switched by pivoting the ventilator. A set-up with a two-part ventilator is also conceivable. The journaling of the ventilator or ventilators has the supplemental advantage that the not-shown cylinder of the ventilator(s) acts as a damper, thus allowing to close-off the ventilation aperture.

The power supply may be provided as 230 V household supply or in other ways. The ventilators 130, 140 are advantageously chosen to provide a flow rate in the range of 10 to 30 m3/h to provide air for a room with a volume of 20 to 60 m3. Test results on commercially available ventilators having such a capacity typically have a sound pressure level (Lpa) of 32 to 42 dB.

The heat exchange in the regenerators shown in Figs 15 and 16 indicate one situation in Fig. 15: The flow of outgoing warm air in one ventilation unit 110, which heats the regenerator of that ventilation unit such that cooled air exits the ventilation unit 110. In the other ventilation unit 120, cool air from the outside passes through the regenerator of ventilation unit 120 and is heated and enters the interior as warm air. This provides for a heat recovery rate of up to 90%. In Fig. 16, the flow direction has been switched, and cool air entering the now heated regenerator of ventilation unit 110 is heated and enters the interior as warm air, whereas warm air from the interior passes through the regenerator of ventilation unit 120 and is cooled down during the passage and exits to the exterior as cool air.

The ventilation assembly 100 may furthermore comprise a Hall element for registering the position of the ventilation flap. This provides for the possibility of obtaining operation without physical contact of the parts involved. In an embodiment, which presupposes that the ventilation flap 40 is provided with a lock case with a striking plate in a manner known per se, a Hall element is connected to the striking plate. This provides for easy mounting of the ventilation assembly. Thus, the necessary wiring to power and control the ventilation assembly is guided through well-established parts of the window. No penetration of the underroof is necessary. Other elements may be present for indicating a light or other marking in the transition channels, for instance blue for cold air and red for warm air, or the like.

In a not-shown embodiment, the ventilation device comprises a pushbutton ventilation device as disclosed in DK176947B1. The activation and deactivation of the ventilation assembly could also be built-into the ventilation device also in this embodiment.

Alternatively, the ventilation flap may be electrically or pneumatically operated, possibly controlled by remote control means.

In addition to blowing warm (or cold) air into the room, heating (or cooling) of other locations is also conceivable.

It should be noted that the above description of preferred embodiments serves only as an example, and that a person skilled in the art will know that numerous variations are possible without deviating from the scope of the claims.

Claims

1. Ovenlysvinduesystem, som omfatter: et ovenlysvindue (1), som har mindst en karm (2, 3), der afgrænser et karmplan og indbefatter en rude (4), hvor ovenlysvinduet (1) endvidere omfatter en ventilationsindretning, som er forbundet med et karmelement og indrettet til at tilvejebringe ventilation af en bygning, i hvilken ovenlysvinduet er monteret, og en ventilationsanordning (1 00), som omfatter mindst en ventilationsenhed (110, 1 20), som indbefatter en ventilator (130, 140), hvor den mindst ene ventilationsenhed er indrettet til at blive forbundet til ventilationsindretningen af ovenlysvinduet, kendetegnet ved, at ventilationsanordningen (100) omfatter et hus (150) med foruddefinerede dimensioner, og som huser ventilationsenheden eller enhederne (110, 120), og at hver ventilationsenhed indbefatter et sæt strømningskanaler, og et sæt af overgangskanaler (1611), der har en første forbindelsesende, som er forbundet i en monteret tilstand til sættet af strømningskanaler og en anden forbindelsesende, som er forbundet i den monterede tilstand til ventilationsanordningen af ovenlysvinduet (1).A skylight window system comprising: a skylight window (1) having at least one frame (2, 3) defining a frame plane and including a window (4), the skylight window (1) further comprising a ventilation device associated with a frame member and arranged to provide ventilation of a building in which the skylight window is mounted, and a ventilation device (1 00) comprising at least one ventilation unit (110, 1 20) including a fan (130, 140), at least one ventilation unit is arranged to be connected to the ventilation device of the skylight window, characterized in that the ventilation device (100) comprises a housing (150) of predefined dimensions and housing the ventilation unit or units (110, 120) and each ventilation unit includes a a set of flow channels, and a set of transition channels (1611) having a first connecting end connected in a mounted state to the set of flow channels and a duct n connection end connected in the mounted state to the ventilation device of the skylight window (1).

2. Ovenlysvinduesystem ifølge krav 1, hvor de foruddefinerede dimensioner af huset (150) indbefatter en foruddefineret bredde, en foruddefineret længde og en foruddefineret højde, og hvor huset (150) er opdelt i højderetningen i en bunddel (1501) og en topdel (1502), og hvor sættet af strømningskanaler (151 1, 1512, 1521, 1522) er dannet af kanaldele i de respektive bund- og topdele (1501, 1502) sammen med ventilationsenhederne (110, 120) i en monteret tilstand.A skylight window system according to claim 1, wherein the predefined dimensions of the housing (150) include a predefined width, a predefined length and a predefined height, and the housing (150) is divided in the height direction into a bottom part (1501) and a top part (1502 ), and wherein the set of flow ducts (151 1, 1512, 1521, 1522) is formed by duct portions in the respective bottom and top portions (1501, 1502) together with the ventilation units (110, 120) in a mounted state.

3. Ovenlysvinduesystem ifølge krav 1 eller 2, hvor de foruddefinerede dimensioner af huset (150) indbefatter en foruddefineret bredde, en foruddefineret længde og en foruddefineret højde, og hvor huset (150) er opdelt i bredderetningen i en venstre del og en højre del, hvor hver venstre og højre del omfatter en respektiv en af to ventilationsenheder (110, 120), hvor de venstre og højre dele er fortrinsvis integreret med hinanden.A skylight window system according to claim 1 or 2, wherein the predefined dimensions of the housing (150) include a predefined width, a predefined length and a predefined height, and the housing (150) is divided in the width direction into a left portion and a right portion. wherein each left and right portions comprise a respective one of two ventilation units (110, 120), the left and right portions being preferably integrated with each other.

4. Ovenlysvinduesystem ifølge et hvilket som helst af de foregående krav, hvor sættet af overgangskanaler (1611) er dannet i et overgangselement (161, 1 62), fortrinsvis separat fra de resterende dele af ventilationsanordningen (1 00).A skylight window system according to any one of the preceding claims, wherein the set of transition ducts (1611) is formed in a transition element (161, 1 62), preferably separately from the remaining parts of the ventilation device (1 00).

5. Ovenlysvinduesystem ifølge krav 4, hvor sættet af overgangskanaler (1611) omfatter tre åbninger ved den første forbindelsesende til forbindelse til sættet af strømningskanaler (1511, 1512, 1521, 1522), og to åbninger ved den anden forbindelsesende, der er indrettet til at blive forbundet til ventilationsindretningen (40) af ovenlysvinduet (1), hvor åbningerne ved den anden forbindelsesende er fortrinsvis forsynet med skrå eller buede plader.A skylight window system according to claim 4, wherein the set of transition channels (1611) comprises three openings at the first connecting end for connection to the set of flow channels (1511, 1512, 1521, 1522), and two openings at the second connecting end adapted to be connected to the ventilation device (40) of the skylight window (1), the openings at the other connecting end being preferably provided with inclined or curved plates.

6. Ovenlysvinduesystem ifølge et hvilket som helst af de foregående krav, hvor ventilationsanordningen omfatter to ventilationsenheder, og hvor hver ventilationsenhed omfatter en varmevekslingsindretning, fortrinsvis en regenerator.A skylight window system according to any one of the preceding claims, wherein the ventilation device comprises two ventilation units and each ventilation unit comprises a heat exchange device, preferably a regenerator.

7. Ovenlysvinduesystem ifølge krav 6, hvor ventilatoren (130, 140) er drejeligt lejret i ventilationsenheden for at skifte strømningsretningen i sættet af strømningskanaler (1511, 1512, 1521, 1522).A skylight window system according to claim 6, wherein the fan (130, 140) is pivotally mounted in the ventilation unit to change the flow direction in the set of flow ducts (1511, 1512, 1521, 1522).

8. Ovenlysvinduesystem ifølge et hvilket som helst af de foregående krav, hvor de foruddefinerede dimensioner af huset (150) indbefatter en foruddefineret bredde, en forud-defineret længde og en foruddefineret højde, og de vælges således, at bredden ikke overskrider eller højst svarer til vinduets bredde, og at højden ikke overstiger eller højst svarer til vinduets højde.A skylight window system according to any one of the preceding claims, wherein the predefined dimensions of the housing (150) include a predefined width, a predefined length and a predefined height, and are chosen such that the width does not exceed or at most does not correspond to the width of the window and that the height does not exceed or at most does not correspond to the height of the window.

9. Ovenlysvinduesystem ifølge krav 8, hvor karmen (2) omfatter et topelement, et bundelement og to sideelementer, der definerer et rammeplan, og hvor rammen (3) omfatter et topelement, et bundelement og to sideelementer, der definerer et rammeplan, hvor rammen (3) har en åbning til ruden (4), og hvor huset (150) af ventilationsanordningen er placeret i det væsentlige i planen af karmen og rammen.A skylight window system according to claim 8, wherein the frame (2) comprises a top element, a bottom element and two side elements defining a frame plane, and wherein the frame (3) comprises a top element, a bottom element and two side elements defining a frame plane, wherein the frame (3) has an opening for the pane (4) and wherein the housing (150) of the ventilation device is located substantially in the plane of the frame and frame.

10. Ovenlysvinduesystem ifølge et hvilket som helst af de foregående krav, hvor ventilationsindretningen indbefatter en ventilationsklap (40) med mindst to driftspositioner, fortrinsvis med tre driftspositioner.A skylight window system according to any one of the preceding claims, wherein the ventilation device includes a ventilation flap (40) having at least two operating positions, preferably with three operating positions.

11. Ovenlysvinduesystem ifølge krav 10, hvor ventilationsanordningen indbefatter aktiveringsmidler, som er indrettet til at blive aktiveret ved at betjene ventilationsindretningen således, at ventilationsanordningen aktiveres ved at bringe ventilationsklappen (40) fra en første til en anden position, og blive deaktiveret ved at bringe ventilationsklappen (40) fra den anden til den første position, fortrinsvis fra den anden til den første eller til en tredje position.A skylight window system according to claim 10, wherein the ventilating device includes activating means adapted to be actuated by operating the ventilating device such that the ventilating device is activated by bringing the ventilation flap (40) from a first to a second position and being deactivated by bringing the ventilation flap (40) from the second to the first position, preferably from the second to the first or to a third position.

2. Ovenlysvinduesystem ifølge krav 1 0 eller 11, hvor ventilationsklappen (40) er forsynet med et låsehus med en låseblik, og hvor et Hall-element er forbundet med låseblikken.A skylight window system according to claim 10 or 11, wherein the ventilation flap (40) is provided with a lock housing with a locking can and wherein a Hall element is connected to the locking can.

13. Fremgangsmåde til betjening af en ventilationsanordning af ovenlysvinduesyste-met ifølge krav 1, som omfatter trinene at: tilvejebringe ventilationsanordningen med aktiveringsmidler, tilslutte ventilationsenheden eller enhederne til ventilationsindretningen af ovenlysvinduet, og aktivere ventilationsanordningen ved at betjene ventilationsindretningen.A method of operating a ventilation device of the skylight window system according to claim 1, comprising the steps of: providing the ventilation device with activating means, connecting the ventilation unit or units to the ventilation device of the skylight window, and activating the ventilation device by operating the ventilation device.

14. Fremgangsmåde ifølge krav 13, hvor ventilationsindretningen af ovenlysvinduet indbefatter en ventilationsklap, og hvor trinnet af aktiveringen af ventilationsanordningen udføres ved at bringe ventilationsklappen (40) fra en første til en anden position, og deaktiveringen ved at bringe ventilationsklappen (40) fra den anden til den første position, fortrinsvis fra den anden til den første eller til en tredje position.A method according to claim 13, wherein the ventilation device of the skylight window includes a ventilation flap and wherein the step of activating the ventilation device is performed by bringing the ventilation flap (40) from a first to a second position and the deactivation by bringing the ventilation flap (40) from the second one. to the first position, preferably from the second to the first or to a third position.

15. Fremgangsmåde ifølge krav 13 eller 14, hvor ventilationsanordningen omfatter to ventilationsenheder, og hvor hver ventilationsenhed omfatter en varmevekslingsindretning, fortrinsvis en regenerator.The method of claim 13 or 14, wherein the ventilation device comprises two ventilation units and each ventilation unit comprises a heat exchange device, preferably a regenerator.

16. Fremgangsmåde ifølge krav 15, hvor hver ventilator er drejeligt lejret i ventilationsenheden, og hvor strømningsretningen i sættet af strømningskanaler skiftes ved at dreje ventilatoren.The method of claim 15, wherein each fan is pivotally mounted in the ventilation unit and wherein the flow direction in the set of flow channels is changed by rotating the fan.