FR3109170A1 - Bay unit assembly with integrated ventilation system - Google Patents

Abstract

The block-bay assembly comprises a fixed frame 12, a sash 14, a roller shutter box 16, and a ventilation system 18 fixed to the fixed frame 12 and comprising a casing 36 and a ventilation group 38 supported by the casing . The ventilation unit 38 comprises at least one fan and a drive motor for said fan. The casing 36 is provided with at least one air inlet opening 54 and a rear wall 44 of said casing is provided with at least one air outlet opening 56. At least one through opening 58 is provided in the thickness of a lower crosspiece 24 of the fixed frame. The part of the rear wall 44 of the housing of the ventilation system, which is provided with said air outlet opening 56, extends at least partly through said opening 58 of the lower crosspiece 24 of the fixed frame. Figure for abstract: Fig 9

Description

Block-bay assembly with integrated ventilation system

The present invention relates to a block-bay assembly intended to equip an opening of a building, in particular of a collective building or a detached house.

Conventionally, a block-window assembly comprises a fixed frame intended to be mounted in an opening of the building, a sash movably mounted on the fixed frame, and a roller shutter box surmounting the fixed frame and equipped with a roller shutter apron intended to be unrolled and rolled up.

Such a block-window assembly has the advantage of being able to be installed in a single block on site and therefore requires no more time to install than a single opening.

The present invention aims to further improve the design of a block-bay assembly.

The invention relates to a block-window assembly intended to equip an opening of a building comprising a fixed frame, a sash mounted movably on the fixed frame between a closed position and a plurality of open positions, and a shutter box roller surmounting at least partly the fixed frame, fixed to the fixed frame and equipped with a roller shutter apron intended to be unrolled outside of said fixed frame.

According to a general characteristic, the block-bay assembly further comprises a ventilation system fixed to the fixed frame and comprising a casing and a ventilation unit supported by the casing. The ventilation unit comprises at least one fan and a drive motor for said fan.

The housing of the ventilation system is provided with at least one air inlet opening, and a rear wall of said housing is provided with at least one air outlet opening.

According to another general characteristic, at least one through opening is formed in the thickness of a lower crosspiece of the fixed frame.

According to a first design, the part of the rear wall of the housing of the ventilation system, which is provided with said air outlet opening, extends at least partly through said opening of the lower crosspiece of the fixed frame.

According to a second alternative design, this part of the rear wall of the casing provided with said air outlet opening faces said opening of the lower crosspiece of the fixed frame.

According to a third design, it is possible to combine the arrangements of the first and second designs for this part of the rear wall of the casing.

Thanks to the invention, there is a block-bay assembly comprising an integrated ventilation system which does not require, during installation, additional assembly operations compared to a conventional block-bay assembly.

With the block-window assembly of the invention, it is possible to ventilate and cool the room inside the building whose opening is equipped with this assembly while the roller shutter apron conceals the opening, in particular in summer and at night when the indoor temperature is higher than the outdoor temperature, by bringing outside air inside.

In one embodiment, a lower wall of the housing of the ventilation system is located vertically above the lower end of the lower crosspiece of the fixed frame, said lower wall being provided with said air inlet opening.

Thus, said air inlet opening is protected against rainwater which cannot penetrate inside the casing.

Preferably, the ventilation system is fixed to the lower crosspiece of the fixed frame.

In this case, the ventilation system can be suspended on the lower transom of the fixed frame. In combination, the housing of the ventilation system can be fitted with foot(s) resting on a window sill.

The ventilation system housing can be attached to the lower crosspiece of the fixed frame. The casing can be fixed against the lower crosspiece of the fixed frame.

As indicated above, the ventilation system is preferably fixed to the lower crosspiece of the fixed frame. Alternatively, the ventilation system could be attached to the vertical uprights of the fixed frame.

When the part of the rear wall of the housing of the ventilation system which is provided with said opening is arranged according to the first design indicated above, it is possible to provide for this or these air outlet opening(s) to be flush ( nt) with an inner wall of the lower crosspiece of the fixed frame which is equipped with a seal against which the sash rests in its closed position.

With such an arrangement, the air flow at the outlet of the casing is not disturbed by the fixed frame, and in particular by the air gap delimited between the inner wall and the outer wall of the lower crosspiece of the fixed frame. Alternatively, it remains however possible to provide that said air outlet opening is located between these inner and outer walls of the lower crosspiece, or even offset on the inner side with respect to the inner wall.

When the part of the rear wall of the housing of the ventilation system which is provided with said opening is arranged according to the second design indicated above, this part of the rear wall can come into contact with or at a short distance from the lower crosspiece of the frame. rear frame, more precisely from the outer wall of the crosspiece.

The ventilation system may further comprise a cover covering the casing. In a preferred embodiment, the cover extends transversely from one vertical upright to the other vertical upright of the fixed frame. Alternatively, it remains possible to provide a cover having a reduced transverse dimension.

Preferably, the roller shutter apron bears against the cover of the ventilation system in its lowered closed position.

Advantageously, the cover of the ventilation system closes off the casing. Thus, the number of parts of the ventilation system is reduced, which reduces the cost and the overall weight. As a variant, however, it is still possible to provide a cover specific to the casing which is itself covered by the cover.

The cover of the ventilation system can be fixed to the casing, in particular by snap-fastening. Alternatively or in combination, the cover can be fixed on the fixed frame, in particular on the lower crosspiece of the fixed frame.

The cover can be equipped, at each transverse end, with a flange fixed to the fixed frame, in particular on the lower crosspiece of the fixed frame.

The ventilation system may include a removable grille and/or a removable filter covering said air intake opening of the crankcase.

In one embodiment, the ventilation system comprises a manually actuated control button to actuate the drive motor of the ventilation unit, at least one sensor capable of detecting an opening of the opening, and a control unit capable , in the presence of an activation signal from the manually actuated control button, in delivering a control signal for the operation of the drive motor only in the presence of a signal from the sensor representative of the open position of the sash .

Thus, the control unit is able to render inoperative, when the sash is not in its open position, the manual actuation of the control button to prevent the starting of the drive motor of the ventilation unit.

In one embodiment, the rear wall of the housing of the ventilation system is equipped with said sensor. The sensor can for example be a photoelectric sensor, for example an infrared sensor.

The ventilation system can also comprise at least a first temperature sensor able to detect the temperature inside the building, and at least a second temperature sensor able to detect the temperature outside the building, the unit of control being capable, in the presence of an activation signal of the manually actuated control button, of delivering a control signal for the operation of the drive motor only in the presence of a signal from the sensor representative of the open position of the sash and when the outside temperature is lower than the inside temperature.

Alternatively or in combination, the ventilation system may further comprise at least one sensor capable of detecting the lowered closing position of the roller shutter apron, the control unit being capable, in the presence of an activation signal of the button manually actuated control device, to deliver a control signal for the operation of the drive motor only in the presence of a signal from the sensor representative of the open position of the sash and in the presence of a signal from the sensor representative of the lowered closing position of the roller shutter curtain. The sensor capable of detecting the lowered closing position of the roller shutter apron can for example be a pressure sensor mounted on the hood. Alternatively, this sensor can be a magnetic sensor allowing detection of the closed position of the roller shutter apron thanks to the presence of a magnet placed on the apron.

Preferably, the control unit of the ventilation system is the unit ensuring the control of the drive motor of the ventilation unit.

Alternatively, the ventilation unit may include its own electronic control unit for this control, said control signal emitted by the electronic control unit being delivered to the electronic control unit. In this case, the electronic control unit is separate from the control unit. These two units can be coupled or interconnected by a connection or data link, for example of the wired or radio type, or even via a communication bus.

The present invention will be better understood on studying the detailed description of an embodiment, taken by way of non-limiting example and illustrated in the accompanying drawings, in which:

is a front view of a block-bay assembly according to an exemplary embodiment of the invention,

is a perspective view of the block-bay assembly of Figure 1,

is a perspective view of the block-window assembly of Figure 1 in a lowered position of a roller shutter apron of said assembly,

is a perspective view of the block-bay assembly of FIG. 1 in which a ventilation system of said assembly has not been shown,

is a detail view of Figure 4,

is a perspective view of the block-bay assembly of FIG. 1 in which a cover of the ventilation system has not been shown,

is an exploded perspective view of the ventilation system of the block-bay assembly of Figure 1,

is a perspective view of the ventilation system of the block-bay assembly of Figure 1,

is a sectional view along the axis IX-IX of Figure 1,

is a perspective view of the block-bay assembly of Figure 1,

And

is a detail view of figure 10.

Figures 1 and 2 show a block-bay assembly, referenced 10 as a whole, which is intended to be mounted in an opening provided through a vertical wall of a building.

In the following description, the "transverse" and "vertical" directions are defined with reference to the orthonormal reference shown in Figure 2 which includes:

- a transverse X and horizontal axis,

- a vertical axis Y, orthogonal to the transverse axis X and directed from bottom to top, and

- a Z axis, orthogonal to the transverse and vertical axes X, Y and directed from the inside to the outside of the building.

The block-bay assembly 10 comprises a fixed frame 12 intended to be mounted in the opening of the building, an opening 14 mounted on the fixed frame 12, and a roller shutter box 16 surmounting the fixed frame. The fixed frame 12, the opening 14 and the box 16 can for example be made of PVC or aluminum, or even of any other suitable material.

As described in more detail below, the block-bay assembly 10 further includes a ventilation system 18 integrated into said assembly. The block-bay assembly 10 forms a unitary assembly.

In a manner known per se, the fixed frame 12 comprises two vertical side uprights 20 (only one being visible in the figures), an upper crosspiece 22 and a lower crosspiece 24 (FIGS. 4 and 6) which are assembled together to form a frame. rigid.

The sash 14 makes it possible to close/open the opening delimited by the fixed frame 12. The sash 14 is movably mounted on the fixed frame 12 between a closed position visible in FIGS. 1 to 4 and 6, and a plurality of positions opening. The opening 14 opens on the interior side of the building. In the illustrated embodiment, the opening 14 is made in the form of a window with two leaves mounted to rotate. As a variant, it is possible to provide other designs of the sash 14, for example a single-leaf window, or even a sliding sash.

The shutter box 16 is fixed to the fixed frame and overcomes it. The box 16 is fixed to the upper crosspiece 22 of the fixed frame. The box 16 is equipped with a roller shutter apron 26 (FIG. 3) intended to be unrolled outside the fixed frame 12 to conceal the opening 14 and rolled up inside the box, and with a winding means / unwinding integrated inside said box. The rotation of the winding/unwinding means can be controlled manually or by an electric motor.

To guide the up and down movements of the roller shutter apron 26, the block-window assembly 10 comprises vertical side slides 28, 30 each fixed to one of the side uprights 20 of the fixed frame.

In the illustrated embodiment, the block-window assembly 10 also comprises a window sill or sill 32 fixed to the lower crosspiece 24 of the fixed frame. The transverse size of the support 32 is equal to that of the lower crosspiece 24. Alternatively, the block-window assembly 10 may not be equipped with this window support 32.

The ventilation system 18 is fixed on the lower crosspiece 24 of the fixed frame. The ventilation system 18 is attached to the exterior side of the building. The ventilation system 18 is held above the window sill 32. A vertical space 34 (Figure 9) is provided between the window sill 32 and the ventilation system 18.

As illustrated more clearly in Figures 6 to 8, the ventilation system 18 comprises a casing 36, a ventilation unit 38 supported by the casing, and a protective cover 40. The casing 36 and the protective cover 40 can for example be made of PVC or aluminum, or even of any other suitable material.

The casing 36 is fixed to the lower crosspiece 24 of the fixed frame on the exterior side of the building. The housing 36 comprises a horizontal bottom wall 42 extending transversely, and a rear wall 44 vertical extending transversely. The rear wall 42 extends vertically upwards a rear edge of the lower wall 42. The lower wall 42 vertically delimits the casing 36 on the lower side. The casing 36 also comprises two side flanges 46 which delimit the casing in the transverse direction. The flanges 46 are fixed on the lower 42 and rear 44 walls.

Each flange 46 is equipped with a lug 48 for fixing the casing 34 to the lower crosspiece 24 of the fixed frame. Screws (not shown), which are introduced from the inside, pass through the lower crosspiece 24 and are each screwed onto one of the lugs 48. Thus, the casing 36 is fixed here on the lower crosspiece 24 of the fixed frame by screwing. Alternatively, the screws could be introduced from the outside. Alternatively, it could be possible to provide other means of fixing the casing 36 to the lower crosspiece 24 of the fixed frame, for example by snap-fastening, by gluing or even by heat-sealing.

The casing 36 delimits an open space inside which the ventilation unit 38 is mounted. In the embodiment illustrated, the casing 36 is open. Alternatively, the casing 36 could be closed and delimit a closed space.

The ventilation unit 38 is fixed to the bottom wall 42 of the casing. The ventilation group 38 comprises an outer casing 50 and a fan (not visible) provided with fins. The fan comprises a shaft extending transversely and provided at its periphery with the vanes. The fins can also extend in the transverse direction.

The ventilation unit 38 also includes an electric motor 52 for driving the fan shaft in rotation. In the illustrated embodiment, the motor 52 is located outside the housing 50. Alternatively, the motor 52 could be located inside the housing.

As will be described in more detail later, the ventilation system 18 also includes an electronic control unit 53 allowing the activation of the motor 52 of the ventilation unit. The control unit 53 can take the form of a printed circuit board. The control unit 53 is fixed to the casing 36, here on one of the flanges 46.

The bottom wall 42 of the housing includes a plurality of air inlet openings 54 and the rear wall 44 includes a plurality of air outlet openings 56. The air inlet openings 54 are oriented on the exterior side of the building and the air outlet openings 56 are oriented on the interior side of the building.

The fan of the ventilation unit 38, driven by the motor 52 in a suitable direction of rotation, is capable of generating a flow of air drawn into the casing 36 through the openings 54 and blown out of the casing through the openings 56. The casing 50 provides air guidance between the air inlet openings 54 and the air outlet openings 56.

As indicated above, the ventilation system 18 is maintained above the window sill 32. The lower wall 42 of the housing 36 is located vertically above the window sill 32, and therefore the lower end of the lower crosspiece 24 of the fixed frame, to leave an air passage and allow the flow of air to be sucked in through the openings 54. The vertical space 34 (FIG. 9) is provided between the window sill 32 and the bottom wall 42 of the casing. The openings 54 are oriented vertically on the side of the support 32.

As illustrated in Figures 4, 5 and 9, a through opening 58 is formed in the thickness of the lower crosspiece 24 of the fixed frame. In a manner known per se, the lower crosspiece 24 comprises two vertical walls 24a, 24b spaced apart. One of the two vertical walls of the lower crosspiece 24 is oriented on the interior side of the building while the other vertical wall is oriented on the exterior side of the building. The opening 58 passes through the two vertical walls 24a interior and 24b exterior of the lower crosspiece 24. The vertical wall 24a interior is equipped with a seal 59 against which the opening 14 presses in its closed position.

The rear wall 44 of the casing is mounted in abutment against the lower crosspiece 24 of the fixed frame. More specifically, the rear wall 44 is mounted in abutment against the outer vertical wall 24b of the lower crosspiece.

As is particularly visible in Figure 8, in the illustrated embodiment, the rear wall 44 of the housing has a stepped shape. The rear wall 44 is provided with a base part bearing against the vertical outer wall 24b of the lower crosspiece 24, and with a projecting part extending rearwardly from the base part and provided with the openings 54 air inlet.

The projecting part of the rear wall 44 of the casing extends inside and through the through opening 58 of the lower crosspiece 24. In the illustrated embodiment, this projecting part of the rear wall 44 is dimensioned so that the air outlet openings 56 are flush with the inner wall of the lower crosspiece 24 on the inner side as can be seen in FIG. the rear wall 44.

The housing outlet openings 56 are through. The openings 56 are arranged on the rear wall 44 so as to face the casing 50 of the ventilation unit, here over the entire transverse length thereof. In the illustrated embodiment, the outlet openings 56 are formed on a grid (not referenced) which is fixed to the rear wall 44 of the casing. As a variant, the openings 56 can be formed directly in the thickness of the rear wall 44. In the example illustrated, the rear wall 44 of the casing is provided with a plurality of openings 56 for the air outlet. The number, shape and/or arrangement of the openings 56 may be different from that illustrated in the figures. Alternatively, it is also possible for the rear wall 44 of the casing to be provided with a single air outlet opening 56 which is preferably of large size in this case.

The air inlet openings 54 are formed in the thickness of the lower wall 42 of the casing. The air inlet openings 54 are through. Similarly to the openings 56, the openings 54 are arranged on the lower wall 42 so as to face the casing 50 of the ventilation unit, here over the entire transverse length thereof. In the illustrated embodiment, the bottom wall 42 of the casing is provided with a plurality of openings 54 for air intake. The number, shape and/or arrangement of the openings 54 may be different from that illustrated in the figures. Alternatively, it is also possible for the bottom wall 42 of the casing to be provided with a single air inlet opening 54 which is preferably of large size in this case. In the example illustrated, the inlet openings 54 are formed directly in the thickness of the lower wall 42 of the casing. Alternatively, similarly to the openings 56, the opening or openings 54 can be provided on a grid attached to the lower wall 42.

The cover 40 of the ventilation system covers the casing 36. As can be seen in FIGS. 1 to 3, the cover 40 extends transversely from one side upright 20 to the other of the fixed frame. The lower ends of the guide rails 28, 30 of the roller shutter apron 26 bear against the hood 40. In its lowered closed position, the roller shutter apron 26 also bears against the hood 40.

Cover 40 covers cover 36. Given the open design of cover 36, cover 40 also closes cover 36. Referring again to Figures 7 and 9, cover 40 has a transverse front edge 40a which is flush with the lower wall 42 of the casing, and an opposite rear rear edge 40b which is flush with the upper end of the rear wall 44 of the casing and bears against the outer vertical wall 24b of the lower crosspiece. The cover 40 envelops the casing 36.

The cover 40 is equipped, at each transverse end, with a flange 60 to achieve its fixing on the lower crosspiece 24 of the fixed frame on the outside of the building. The cover 40 is fixed on the flanges 60 by snap-fastening. For this purpose, notches (not referenced) are provided on the flanges 60.

Each flange 60 is equipped with a lug 62 for fixing the cover 40 to the lower crosspiece 24 of the fixed frame. Screws (not shown), which are introduced from the inside, pass through the lower crosspiece 24 and are each screwed onto one of the tabs 62. Thus, the cover 40 is fixed here on the lower crosspiece 24 of the fixed frame by screwing. Alternatively, the screws could be introduced from the outside. Alternatively, it could be possible to provide other means of fixing the cover 40 to the lower crosspiece 24 of the fixed frame, for example by snap-fastening, by gluing or even by heat-sealing.

In the illustrated embodiment, the cover 40 is also fixed on the flanges 46 of the housing by snap-fastening. For this purpose, notches (not referenced) are provided on the flanges 46.

In the illustrated embodiment, an empty space is provided between each flange 60 of the cover and the flange 46 of the housing which is opposite considering the transverse direction. It is possible to provide foam blocks, or any other suitable material, to fill these empty spaces.

The ventilation system 18 further comprises a sensor 64 (FIG. 11) for detecting an open position or a closed position of the opening 14. The sensor 64 is mounted on the rear wall 44 of the casing, here in the vicinity of the outlet openings 56 of air. The sensor 64 can for example be an infrared sensor. The sensor 64 is connected to the control unit 53 of the ventilation system, for example via a communication bus. The signals emitted by the sensor 66 and transmitted to the control unit 53 are representative of the open or closed position of the opening 14.

The ventilation system 18 also includes an on/off button 66 to control the operation of the motor 52 of the ventilation unit. The button 66 can for example be a push button. In the illustrated embodiment, the button 66 is mounted on the rear wall 44 of the casing, here in the vicinity of the sensor 64.

The control unit 53 also receives as input an activation signal representative of a manual control command to start the motor 52. An electrical contact, for example a bistable electrical relay, is associated with the button 66 and delivers a activation signal (a logical state "1") to the corresponding input of the control unit 53 when the user actuates this button 66. This activation signal is transmitted to the control unit 53 by the through a connection.

The control unit 53 is capable, in the presence of an activation signal of the button 66, of delivering a control signal for the operation of the motor 52 only in the presence of a signal from the sensor 64 representative of the open position of the opening 14. For example, the control unit 53 comprises a control circuit and an AND logic gate, a first input of which is subject to the signals from the sensor 64 and a second input is subject to the signals from the button 66, and one output of which is connected to the control circuit.

When the opening 14 is in its open position and the user controls the switching on of the ventilation unit 38 via the button 66, the corresponding inputs of the AND gate are each at the logic state “1”. The output of the AND gate is therefore also at the logic state "1" and the control circuit of the control unit 53 issues a control signal for starting the motor 52.

As indicated above, in the illustrated embodiment, the button 66 is mounted on the rear wall 44 of the housing. Therefore, the actuation of the button 66 is possible only when the opening 14 is open.

Alternatively, it is conceivable to provide a remote mounting of the button 66, for example on a remote control. In this case, if the opening 14 is in its closed position and the user controls the starting of the ventilation unit 38 via the button 66 of the remote control, only the entry of the AND gate corresponding to the activation of this button is in the logic state “1”, the input of the AND gate corresponding to the position of the opening 14 being in the logic state “0”. The output of the AND gate is thus at the logic state "0" and the control circuit of the control unit 53 does not emit any control signal in the direction of the motor 52.

When the roller shutter apron 26 is in its lowered closed position, if the sash 14 is open and the user presses the button 66, the ventilation unit 38 generates a flow of air coming from the outside and penetrating inside, under the effect of the fan, through the casing 36 via the inlet openings 54 and the outlet openings 56, the incoming air flow passing between the lower wall 42 of the casing and the support 32 window.

Such interior movement of air can be particularly useful for cooling occupants inside, for example during hot summer periods and at night, when the temperature outside is lower than the temperature felt inside. inside.

To supply electrical energy to the drive motor 52 of the ventilation system, the electric cable of the roller shutter can be used.

In an embodiment where the ventilation unit 38 is reversible, an air flow could be created between the outlet openings 56 and the inlet openings 54, so as to extract air from the interior space towards the outside.

As indicated above, in the embodiment illustrated, the part of the rear wall 44 of the housing of the ventilation system which is provided with the air inlet openings 54 extends through the through opening 58 of the lower crosspiece 24 of the fixed frame. As a variant, it is possible to provide other configurations of the rear wall 44 of the casing. For example, the part of the rear wall 44 of the housing of the ventilation system which is provided with the air inlet openings 54 can come opposite the through opening 58 of the lower crosspiece 24 but without extending to the inside of it.

Claims (15)

Block-bay assembly intended to equip an opening of a building comprising:
- a fixed frame (12),
- an opening (14) movably mounted on the fixed frame between a closed position and a plurality of open positions, and
- a roller shutter box (16) at least partially overcoming the fixed frame, fixed to the fixed frame and equipped with a roller shutter apron (26), characterized in that it further comprises:
- a ventilation system (18) fixed to the fixed frame (12) and comprising a housing (36) and a ventilation unit (38) supported by the housing, the ventilation unit (38) comprising at least one fan and a drive motor (52) of said fan, the casing (36) being provided with at least one air inlet opening (54) and a rear wall (44) of said casing being provided with at least one air outlet (56),
- at least one through opening (58) being formed in the thickness of a lower crosspiece (24) of the fixed frame,
- the rear wall portion (44) of the housing of the ventilation system, which is provided with said air outlet opening (56), extending at least partly through said opening (58) of the crosspiece (24 ) lower frame, and / or coming opposite said opening (58). A bay assembly according to claim 1, wherein a bottom wall (42) of the ventilation system housing is located vertically above the lower end of the lower cross member (24) of the fixed frame, said bottom wall (42 ) being provided with said air inlet opening (54). Block-bay assembly according to Claim 1 or 2, in which the ventilation system (18) is fixed to the lower crosspiece (24) of the fixed frame. A bay unit according to claim 3, wherein the ventilation system (18) is suspended on the lower crosspiece (24) of the fixed frame. Block-bay assembly according to Claim 3 or 4, in which the housing (36) of the ventilation system is fixed to the lower crosspiece (24) of the fixed frame. A bay assembly according to any preceding claim, wherein said air outlet opening (54) of the rear wall (44) of the housing of the ventilation system is flush with an interior wall (24a) of the lower rail of the fixed frame which is equipped with a seal (59) against which the leaf (14) presses in its closed position. A bay assembly according to any preceding claim, wherein the ventilation system (18) further comprises a cover (40) covering the housing (36) and extending transversely from a vertical post (20) to the other vertical upright (20) of the fixed frame. Block-window assembly according to Claim 7, in which the shutter apron (26) bears against the cover (40) of the ventilation system in its lowered closed position. Block-bay assembly according to Claim 7 or 8, in which the cover (40) of the ventilation system closes off the casing (36). A bay assembly according to any one of claims 7 to 9, wherein the cover (40) of the ventilation system is fixed to the housing (36). Block-bay assembly according to any one of Claims 7 to 10, in which the cover (40) of the ventilation system is fixed to the fixed frame (12), in particular on the lower crosspiece (24) of the fixed frame. Block-bay assembly according to claim 11, in which the cover (40) of the ventilation system is equipped, at each transverse end, with a flange (60) fixed to the fixed frame (12), in particular to the crosspiece (24 ) bottom of the fixed frame. A bay assembly as claimed in any preceding claim, wherein the ventilation system (18) includes a manually actuated control knob (66) for operating the ventilation unit drive motor (52), at least a sensor (64) capable of detecting an opening of the leaf (14), and a control unit (53) capable, in the presence of an activation signal of the manually actuated control button (66), of delivering a control signal for the operation of the drive motor (52) only in the presence of a signal from the sensor (64) representative of the open position of the opening (14). A bay assembly according to claim 13, wherein the rear wall (44) of the ventilation system housing is equipped with said sensor (64). Block-bay assembly according to claim 13 or 14, in which the ventilation system (18) further comprises at least a first temperature sensor adapted to detect the temperature inside the building, and at least a second temperature sensor capable of detecting the temperature outside the building, the control unit (53) being capable, in the presence of an activation signal of the manually actuated control button (66), of delivering a control signal for the operation of the drive motor (52) only in the presence of a signal from the sensor (64) representative of the open position of the opening (14) and when the outside temperature is lower than the inside temperature.