EP3348736B1 - Roof window system with a ventilation assembly with improved flow path and method of operating the ventilation assembly - Google Patents

Roof window system with a ventilation assembly with improved flow path and method of operating the ventilation assembly Download PDF

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Publication number
EP3348736B1
EP3348736B1 EP18151418.3A EP18151418A EP3348736B1 EP 3348736 B1 EP3348736 B1 EP 3348736B1 EP 18151418 A EP18151418 A EP 18151418A EP 3348736 B1 EP3348736 B1 EP 3348736B1
Authority
EP
European Patent Office
Prior art keywords
roof window
transition
ventilation
flow channel
window system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP18151418.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3348736A1 (en
Inventor
Per Jacobsen
Freddy Dam Thomsen
Rasmus Klercke Pedersen
Jacob Christian Molbo
René Borup-Jensen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
VKR Holding AS
Original Assignee
VKR Holding AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by VKR Holding AS filed Critical VKR Holding AS
Priority to PL18151418T priority Critical patent/PL3348736T3/pl
Priority to SI201830011T priority patent/SI3348736T1/sl
Publication of EP3348736A1 publication Critical patent/EP3348736A1/en
Application granted granted Critical
Publication of EP3348736B1 publication Critical patent/EP3348736B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E04D13/0325—Sky-lights; Domes; Ventilating sky-lights provided with ventilating means
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
    • E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
    • E04D13/03—Sky-lights; Domes; Ventilating sky-lights
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B7/00—Special arrangements or measures in connection with doors or windows
    • E06B7/02—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses
    • E06B7/10—Special arrangements or measures in connection with doors or windows for providing ventilation, e.g. through double windows; Arrangement of ventilation roses by special construction of the frame members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/18—Air-flow control members, e.g. louvres, grilles, flaps or guide plates specially adapted for insertion in flat panels, e.g. in door or window-pane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/02—Roof ventilation
    • F24F7/025—Roof ventilation with forced air circulation by means of a built-in ventilator

Definitions

  • the present invention relates to a roof window system comprising a roof window and a ventilation assembly.
  • the invention furthermore relates to a method of operating the ventilation assembly
  • a window besides admitting light, is to allow stale, warm, or otherwise used or spent air inside the building (so-called "room air”) to exit and allowing fresh air from the exterior (“outdoor air”) to enter the building in which the window is installed.
  • 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.
  • 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.
  • 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 , 20204020630U1 , DE19811469A1 and DE2906729U1 .
  • Another example of a prior art device is found in US 2002/164944 A1 .
  • 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.
  • the ventilation assembly takes in outdoor air via ventilation units having flow channels connected to the ventilation device of the roof window and, conversely, allows room air to be led to the exterior in the form of exhaust air through the ventilation assembly.
  • the ventilation units comprise a ventilator and a heat exchange device in the form of a regenerator.
  • the counterpart commercial product has proven to work well, and the roof window system alleviates the disadvantages of the earlier prior art to a great extent.
  • One document devising further improvements of the above EP application is found in DE utility model 20 2016 100 906 U1 .
  • a roof window system comprising all the features of claim 1, i.a. in which a transition portion of the flow path at the transition to the ventilation device of the roof window in at least one ventilation unit is divided by a splitter to form a pair of transition flow channel sections with a respective width dimension and in connection with one respective adjacent flow channel section with a predefined width dimension.
  • the flow performance of the ventilation assembly has surprisingly shown to improve significantly compared to the prior art design with a single but wider flow path.
  • the splitter has a curved triangular shape which diverges from one end at the adjacent flow channel section to the other end, at the transition to the ventilation device of the roof window. In this manner, an improved flow pattern is achieved in comparison to that of a straight flow path.
  • the air guided from the respective regenerator through the ventilator, via the flow channel section, is split at the apex of the triangular shape and into the ventilation device of the roof window, and by the provision of the curved flow path, an improved flow rate is achieved.
  • a drawback of a roof window ventilation assembly comprising a heat exchange device in the form of a regenerator occurs when the outdoor temperature extends in daily intervals both above and below an average, desired indoor temperature e.g. during summer seasons.
  • a heat regenerator can shift the time of the indoor maximum and minimum temperatures to inconvenient hours of the day. Typically, this will result in an elevated indoor temperature at inconvenient times, for instance in a bedroom which is preferred cool during evenings and nights.
  • a roof window system which provides for improved climate and temperature conditions.
  • a roof window system comprising all the features of claim 1, i.a. in which the ventilation assembly of the roof window system furthermore comprises a control unit to provide a by-pass function of the at least one regenerator.
  • the by-pass function can be automatically controlled by the roof window system based on a set comfortable indoor temperature and initiates when indoor temperature conditions will benefit from it such as when the outdoor temperature extends in daily intervals both above and below the indoor temperature. During such condition, when the outside temperature decreases below the inside temperature, the by-pass function will by-pass the regenerator and provide the indoor area with non-heat exchanged naturally tempered air resulting in a naturally conditioned area. As the outside temperature increases above the indoor temperature the by-pass function deactivates. Thereby a roof window system is provided, by which the indoor temperature during warm outdoor conditions is improved with simple means.
  • the window system with included by-pass function allows a desired room to naturally cool during cold hours of the day and the regenerator maintains a comfortable condition during the warm hours of the day, thereby resulting in a naturally conditioned room.
  • the benefits are achieved in a cost-friendly and power-saving means by the by-pass function by utilizing the outdoor temperature without opening the window.
  • the roof window system comprises a roof window 1' and a ventilation assembly generally designated 100' with a cover 151' having an aperture 152' for air intake and exhaust at each end and a housing to be described in further detail below.
  • the roof window system shown in Fig. 1 is as described in the above-mentioned DE utility model 20 2016 100 906 U1 .
  • Explicit reference is made to this document, in particular to Figs 5 and 6 , and the description associated thereto.
  • Elements of the embodiments of the invention having the same or analogous function are denoted by the same reference numerals as in the description of the prior art roof window system, without the ' mark.
  • the roof window 1' comprises at least one frame, here two frames, of which one frame 2' is a stationary frame and the other is an openable sash 3' encasing a pane 4'.
  • the frame 2' and sash 3' each is substantially rectangular and 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.
  • 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.
  • 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.
  • 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.
  • the window according to the innovation 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 roof window system also provides for optional ventilation in the closed position of the window.
  • the sash 3' and frame 2' of the window according to the innovation may be made of wooden members or members made of cast or extruded polyurethane (PUR).
  • PUR cast or extruded polyurethane
  • cover elements including a cladding and a flashing arrangement.
  • a suitable finishing may be provided, for instance comprising a lining panel.
  • the roof window 1' has a ventilation device as shown in Fig. 2 , comprising 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 a lock 43' by means of a link connection 44' 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.
  • a top sash module 50' is provided, for instance of the kind described in Applicant's international application with publication No.
  • WO 2013/050039 A1 allowing the passage of air when the ventilation flap is in the open position.
  • 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.
  • the sash 3' is pivotally connected to the frame 2', and the ventilation flap 40' is adapted to assume three position, viz.
  • 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.
  • FIG. 150 A left-hand and a right-hand ventilation unit (not indicated) are provided in the housing, each comprising two ventilators of which the two right-hand ventilators 132', 134' are shown.
  • Each ventilation unit comprises a heat-exchange device in the form of a regenerator of which the left-hand regenerator 171' is shown.
  • a set of flow channels is provided, of which flow channels 1502' and 1504' of the right-hand ventilation unit are indicated in Fig. 4 , and flow channel 1503' of the left-hand ventilation unit.
  • the ventilation assembly 100' furthermore comprises a divider element 182' including means for providing flow connection to a respective flow channel 1502', 1504', and is mounted to the housing 150' via a plate 192'.
  • Figs 5 to 7 a first embodiment of the roof window system of the present invention will be described.
  • Fig. 8 showing a transition element 162 in an embodiment of the invention
  • Fig. 9 indicating an overview of the main components of the roof window assembly including the roof window 1 with its ventilation device 40, and a ventilation assembly 100 including a housing 150 accommodating at least one ventilation unit, here two ventilation units 110; 120, each including at least one ventilator 131; 132 and at least one regenerator 171; 172.
  • Transition elements 162, 164 are present in the right-hand side and transition elements 161, 163 in the left-hand side at the transition to the ventilation device 40 of the roof window 1.
  • explicit reference is made to the above-mentioned DE utility model 20 2016 100 906 U1 .
  • a set of flow channel sections 1502 and 1504 is present as in the prior art housing 150', connected to the aperture 152 in the cover 151 of the ventilation assembly 100.
  • the respective flow channel section 1508' and 1507' of the prior art at a transition t to the ventilation device 40 of the roof window 1 is replaced by a transition portion of the flow path which is divided by a splitter 1521; 1522 to form a pair of transition flow channel sections 1507, 1509; 1508, 1510, respectively. It is possible to have an asymmetric configuration as well, with only one side being split.
  • the transition portion of the flow path in each ventilation unit 110; 120 is divided by a splitter 1521; 1522 such that the ventilation assembly 100 thereby comprises two pairs of transition flow channel sections 1507, 1509; 1508, 1510.
  • a splitter 1521; 1522 such that the ventilation assembly 100 thereby comprises two pairs of transition flow channel sections 1507, 1509; 1508, 1510.
  • transition flow channel sections 1507, 1509 of the left-hand ventilation unit 110 have respective width dimensions d1, d2.
  • the transition flow channel sections 1508, 1510 of the right-hand ventilation unit 120 are typically configured in a corresponding manner.
  • Each pair of transition flow channel sections are in connection with one respective adjacent flow channel section 1503; 1504, respectively.
  • the adjacent flow channel sections 1503; 1504 each has a predefined width dimension d0.
  • the flow channel sections 1502 and 1504 guide the air from the regenerator 172 through the ventilator 132 (and possibly further ventilators) of the right-hand ventilation unit 120 towards the transition elements 162, 164 on either side of the splitter 1522 in the transition flow channel sections 1508 and 1510, and further into the ventilation device 40 of the roof window 1.
  • the maximum width dimension ds of the splitter 1521 at the transition t is here smaller than the width dimension d1, d2 of each of the pair of transition flow channel sections 1507, 1509.
  • the combined width dimensions d1, d2 of the pair of transition flow channel sections 1507, 1509 substantially corresponds to the width dimension d0 of the adjacent flow channel section 1503.
  • each splitter 1521; 1522 is designed as a curved triangular shape which diverges from one end at the adjacent flow channel section 1503; 1504 to the other end, at the transition t to the ventilation device 40 of the roof window 1.
  • the air guided from the respective regenerator through the ventilator, via the flow channel section, is thus split at the apex of the triangular shape.
  • the splitter can have any design which divides the flow path and improves the flow pattern, such as, but not limited to; tubular or semi-circular shapes or a thin edged dividing wall.
  • the shape of each transition flow channel section 1507, 1509; 1508, 1510 is shown as curved, but variations may occur as well.
  • the invention is particularly advantageous in the case of wide roof windows, i.e. roof window systems in which the ventilation assembly 100 is provided with a large width w matching that of the roof window 1.
  • the ratio between the total width w of the housing 150 of the ventilation assembly 100 and the width dimension of the total width of the transition flow channel sections 1507, 1509; 1508, 1510 is in the range 1.5 to 2.5, more preferably 1.8 to 2.2. Even with this seemingly large ratio, it has proven possible to provide sufficient ventilation.
  • transition elements 161, 163; 162, 164 provided at the transition t between the ventilation assembly 100 and the ventilation device 40 of the roof window 1 are chosen in accordance with the specifications to the roof window system.
  • the transition element 162 has, as shown in Fig. 8 , a width dimension dt substantially corresponding to the respective width dimension d1, d2 of the respective transition flow channel section 1507, 1509; 1508, 1510. Further details of the transition element 162 are shown in Fig. 8 , including opening 1621 for the passage of air into and out of the room in which the roof window 1 of the roof window system is installed.
  • Arc-shaped section 1622 provides for appropriate guiding of the air, and furthermore, fastening means 1623 for safe retention of the transition element 162 are shown.
  • a control unit 200 is provided to allow the ventilation assembly 100 of the roof window system to by-pass the regenerator or regenerators 171; 172.
  • the control unit 200 it is possible to halt the regeneration of heat in the regenerators 171; 172 by a by-pass function.
  • the by-pass may be provided by an additional flow path circumventing the regenerators 171; 172 and directing the air directly to the ventilators 131, 132 as indicated by dashed lines in Fig. 9 , by not switching the flow direction of the ventilators as described in the above, or simply by stopping the operation of the regenerators and possibly also of the ventilators 131; 132.
  • the method of operating the ventilation assembly of the roof window system may be described as comprising the steps of:
  • the by-pass function may be automatically initiated and stopped based on a user-adjustable target maximum temperature and optionally time period, for instance by inputs to the operating panel.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Building Environments (AREA)
EP18151418.3A 2017-01-12 2018-01-12 Roof window system with a ventilation assembly with improved flow path and method of operating the ventilation assembly Active EP3348736B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL18151418T PL3348736T3 (pl) 2017-01-12 2018-01-12 Układ okna dachowego z zespołem wentylacyjnym o ulepszonej ścieżce przepływu i sposób sterowania działaniem zespołu wentylacyjnego
SI201830011T SI3348736T1 (sl) 2017-01-12 2018-01-12 Sistem strešnega okna s prezračevalnim sklopom z izboljšano smerjo pretoka in postopek za upravljanje prezračevalnega sklopa

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DKPA201770018A DK179652B1 (en) 2017-01-12 2017-01-12 Roof window system with a ventilation assembly with improved flow path and method of operating the ventilation assembly

Publications (2)

Publication Number Publication Date
EP3348736A1 EP3348736A1 (en) 2018-07-18
EP3348736B1 true EP3348736B1 (en) 2019-08-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18151418.3A Active EP3348736B1 (en) 2017-01-12 2018-01-12 Roof window system with a ventilation assembly with improved flow path and method of operating the ventilation assembly

Country Status (5)

Country Link
EP (1) EP3348736B1 (pl)
DK (2) DK179652B1 (pl)
ES (1) ES2749132T3 (pl)
PL (1) PL3348736T3 (pl)
SI (1) SI3348736T1 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK180977B1 (en) 2019-12-30 2022-08-29 Vkr Holding As A roof window system with a ventilation unit mounted adjacent to the roof window, a roof structure including a roof window system, a method of providing a roof window system and a method of retrofitting a roof window system
DK180879B1 (en) 2019-12-30 2022-06-13 Vkr Holding As A roof window system with a ventilation unit mounted adjacent to the roof window, and a method of providing ventilation for a building

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7231967B2 (en) * 1994-01-31 2007-06-19 Building Performance Equipment, Inc. Ventilator system and method
DK179084B1 (en) * 2013-03-12 2017-10-16 Vkr Holding As A roof window system comprising a ventilation assembly and method of operating such a ventilation assembly

Non-Patent Citations (1)

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

Also Published As

Publication number Publication date
EP3348736A1 (en) 2018-07-18
ES2749132T3 (es) 2020-03-19
PL3348736T3 (pl) 2020-03-31
DK201770018A1 (en) 2018-08-21
DK179652B1 (en) 2019-03-12
DK3348736T3 (da) 2019-11-18
SI3348736T1 (sl) 2019-12-31

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