FR2694801A3 - Ventilation device for bringing air into an enclosed space, such as a living room or an office. - Google Patents

Abstract

The ventilation device comprises an attached structure (1) for a cavity formed through a wall surrounding said space, this structure defining an indirect passage in which the air flow (a) is caused to change direction.

Description

The present invention relates to a ventilation device to allow

  air intake in an enclosed space, for example a living room or an office The ventilation device will normally be passive, i.e. it will not include a fan.

  turbine erector or equivalent.

  Both building practice and current legislation insist that if a room or other enclosed space includes a combustion heater, including a gas or solid or liquid fuel heater or boiler, the space must be properly ventilated A combustion heater not only burns fuel but

  also oxygen from the air and, if a sufficient amount

  fresh air is not supplied, then the appliance will tend to use the oxygen available in the room In addition, if the air supply to the appliance is not adequate, harmful combustion products , even possibly toxic, can get into

the room.

  Current practice is to form a hole in an external wall and to provide, on the external face of the hole, a hollow brick or equivalent and, on the internal face, a ventilation grille.

  added, generally in prefabricated plastic

  quée, connects the hollow brick and the grid by constituting

  a coating for the cavity thus formed.

  Such a ventilation device can allow an appropriate draft but ensures a visible passage which can constitute a subject of concern. The installation of an internal screen tends to reduce the flow of air and can

  be easily blocked by dust or the like.

  In addition, it is contrary to the regulations in force.

cheerfully.

  According to the present invention, the structure

  scope defines an indirect passage in which the

  air is caused to change direction In a

  embodiment, the structure includes baffles

  teurs which initially direct the air flow forward, that is to say in the direction of the inlet, then in the opposite direction and finally again towards

  the front to create a large flow passage

  neral in S The air flow is not appreciably reduced, it is simply caused to change direction and the disadvantages stated above are greatly avoided. This general S-shaped flow path

  can conveniently be obtained, in a form of realization

  sation, by manufacturing the covering in two similar suitable parts, each having an internal L-shaped deflector and formed to come into contact with one another in order to define the passage of the

as described below.

  In an alternative embodiment, the deflec-

  lengths spread longitudinally mounted alternately

  upwards and downwards define the indirect air passage This embodiment can conveniently be produced from suitable parts

  united around a horizontal line.

  Various other features of the invention

  appear moreover from the detailed description which

follows.

  Embodiments of the subject matter of the

  are shown, by way of non-limiting examples.

mitatives, to the accompanying drawings.

  Figs 1 and 1 A are exploded views of a

  ventilation device conforming to a first reaction

reading of the invention.

  Fig 2 is a view of the ventilation device

  tion of fig 1 mounted in a wall.

  Figs 3 and 4 are schematic views

trating air circulation.

  Fig 5 is a schematic view of a second embodiment. Referring first to fig 1 of

  drawings, we see that the ventilation device illus-

  tré comprises an envelope 1 having a hollow brick-shaped member 2 mounted at the outer end and, at the inner end, a sliding extension 3 of

  telescopically and terminated by an internal grid 4.

  Hollow brick 2 is made from ma-

  molded plastic, in a honeycomb structure

  beille, and comprises several passages passing through it The grid 4 can be of any suitable shape, for example

  example with crossed horizontal slats (not shown

  presented). The casing 1 comprises two identical molded plastic parts 1a (FIG. 1A) and 1b, which are slidably connected together in the manner shown with one of the parts reversed with respect to the other to define together, with the hollow brick 2, the extension 3 and the grid 4, the indirect air passage according to the present invention Each

  part 1a, 1b is constituted by a dry sleeve

  tion rectangular right with an internal wing 5 in L constituting a deflector and extending over its entire width Each wing 5 comprises a first part 6

  arranged vertically, up or down, se-

  lon the case, and a horizontal part 7 with a par-

  inclined or chamfered tie 8 of connection The ho-

  rizontale 7 projects forward to come in

  sliding contact with the other party For ob-

  hold that, each part la, lb has reasons

  nures 9 in which the portions will be placed 10

  of the part 7 of the wing 5 which extend laterally.

  Each sleeve has a half rim II provided with

  towards the grooves 9 A vane of stiffening ver-

  ticale 12 extends from the part 7 towards the wall of the sleeve During the mutual connection, as shown in fig 1, the half-flanges 11 cooperate to create a complete flange which prevents the passage of water vapor, l condensate flowing in the cavity between the wall sections Part 3 which slides telescopically has vertical cutouts

  positioning 13 to engage with the wall ex-

  dull grooves 9 and ribs 15 of the face of

  under part 1 b of envelope 1.

  The hollow brick 2 is mounted in a shallow sleeve provided at one end of the part la of

  the casing 1, the sleeve being defined by a flange

  cut 16 The grid 4 is fixed to a flange 17 provided at

one end of the extension 3.

  The cooperation of the deflector wings 5 defines

  an S-shaped air passage allowing an uninterrupted air flow

  direct in the direction of the arrows (a).

  Fig 2 shows a ventilation device in place The simulated hollow brick 2 is embedded in the

  bricks B of an external wall while the length ef-

  fective ventilation device is adjusted by a telescopic sliding extension 3 which is in turn mounted in the blocks C of the inner wall, the

  traditional type cavity being created between the bri-

  ques B and blocks C. Figs 3 and 4 illustrate an air flow

during a smoke test.

  Fig 3 shows the air and smoke passing forwards and inwards from the outside under the effect of a natural draft from the hollow brick 2 the effect of a natural draft from the hollow brick 2 through the indirect passage in S towards the grid 4 and in the room The direction of the flow is illustrated by the arrows (a) No heater is in operation inside the room and the flow is slow with turbulence Air and smoke can be considered as blown

  by external ambient conditions and, if

  tuation shown in fig 3, there is little internal draft. It will also be noted that the wings 5

  deflectors prevent you from seeing through the

ventilation.

  When a heater is on

  tion inside the room, the situation in fig 4 takes place with internal suction and flow of air and smoke according to the arrows (b) The turbulence is substantially eliminated and an air flow of

  ventilation develops effectively.

  According to a development of the invention, the box

  external tier of the ventilation device may have a circular cross section so as to be inserted

  in a cavity formed by a so-called core bore, that is

  i.e. a hole made in a wall with a cylindrical drill bit having a front cutting edge which, during its insertion and subsequent removal, withdraws a cylindrical core delimiting an air passage Such a core hole constitutes a convenient way to train

  a passage through a masonry wall.

  Apart from the external cylindrical housing, the

  positive ventilation according to this embodiment can be as described with reference to FIGS. 1 and 2, the ventilation device preferably being made in

two parts.

  Fig 5 of the drawing, however, shows a va-

  Riant embodiment in which a cylindrical ventilation device 21 intended to be introduced into a cylindrical cavity formed by a core bore comprises three sectors 22, 23, 24 extruded at 120 and connected to each other to form the cylinder. The air flows in the direction of the arrows (a) forward

  through a first sector 22, towards the rear through

  towards a second adjacent sector 23 and finally again forwards through a third sector 24,

  1 O.1 to define the passage of the internal air flow

  direct that was discussed above.

  To achieve this, at the far end of the ventilation device in the direction of flow

  of air, the walls of sectors 22 and 23 which meet

  trent are cut in 25, while at the near end, the end parts of sectors 23 and 24 which meet are cut in 26 The parts

  end sectors are closed.

  With a cylindrical ventilation device housing mounted in a cavity formed by a bore

  with core, the hollow brick and the grid will be,

  corresponding, disc-shaped, or present

  will have disc-shaped parts.

Claims (5)

  1 Ventilation device for bringing air into an enclosed space comprising an attached structure for a cavity formed through a wall surrounding said space, characterized in that said structure (1) defines an indirect passage in which   the air flow is caused to change direction.   2 Ventilation device as claimed   cation 1, characterized in that the structure (1) comprises   takes deflectors (5) which direct the air flow initially towards the front then in opposite direction and finally forward again.   3 Ventilation device according to one of   claims 1 or 2, characterized in that the structure   ture (1) is formed of two similar parts (la, lb), each having an L-shaped wing (5) and formed to come into contact with each other in order to   define the indirect flow passage.   4 Ventilation device according to one of the   vendications 1 to 3, characterized in that the air flow is turbulent and slow when an appliance   heating placed inside the confined space does not work   does not work, but is regular to ensure ventilation   effective when the appliance is in operation.   5 Ventilation device according to one of   claims 1 or 2, characterized in that it is   cylindrical construction (21) to adapt in a case   hole formed by a core bore and having three extruded sectors (22, 23, 24) corresponding to each other   with each other to form the cylinder.