FR2669970A1 - DOUBLE FLOW VENTILATION UNIT, IN PARTICULAR FOR TECHNICAL COMPARTMENT. - Google Patents

Abstract

Such a ventilation unit according to the invention comprises two linear ventilation turbines (3 and 4) with double tangential flow, arranged in parallel on the same plane inside a flat casing (2), the height of which corresponds substantially to the diameter. turbines (3 and 4) and which comprises air inlet and outlet openings, formed longitudinally on its opposite faces. Application to ventilation devices.

Description

The present invention relates to a linear ventilation unit in particular

  for technical compartment. This involves, for example, ventilating control or operating circuit cabinets for computer equipment, or constituting a multiple linear support of electronic cards of the shelf type known under the name "RACK" Such cards are constituted by a printed circuit board on which components are arranged and soldered

  various electronics according to their application.

  In fact, the invention is aimed at any enclosed compartment, containing material likely to dissipate

calories.

  In such cabinets or technical compartments in general, a key problem lies precisely in the elimination of these calories harmful to the proper functioning of the components they contain and their life In addition, it should be noted that said components are not not uniformly exposed in the enclosure Indeed, by a phenomenon of convection of heat, the components located in the upper part will be more exposed to the elevations

  temperature than those located in the lower part.

  To remedy this, it is known to have in the chamber formed in the compartment a plurality of small individual fans dispersed

  at various places of said enclosure.

  Such a solution has, of course, the disadvantage of absorbing useful volume in the compartment proportional to the number of fans which are arranged there and which must be taken into account when designing the cabinet according to the equipment

operational to contain.

  In addition, it has been found that such a dispersion of the ventilation means, often controlled by the remaining spaces available according to technical requirements, does not allow to provide ventilation and mixing of calories.

in a uniform way.

  The present invention aims to overcome these disadvantages. For this purpose, it relates to a ventilation unit, in particular for technical compartment, characterized in that it comprises two tangential double flow ventilation turbines, arranged in parallel on the same plane inside a flat housing whose height substantially corresponds to the diameter of the turbines and which has openings for entry and exit of air, arranged longitudinally

on its opposite sides.

  Such a unit has not only the advantage of being compact but also of offering a higher ventilation power than the various small fans usually used but for

  reduced footprint and excellent logeability.

  Other features of the invention

  will emerge from the following description made

  with reference to the accompanying drawings, given by way of non-limiting example, in which: Figures 1 and 2 show in perspective general views of a ventilation unit according to the invention showing respectively its upper part and its lower part; Figures 3 and 4 are plan views respectively of the upper and lower parts of the ventilation unit according to Figures 1 and 2; Figure 5 is a cross-sectional view along the line V-V of Figure 3; FIG. 6 is a perspective view of a technical compartment in which is disposed a

  ventilation unit according to the invention.

  The unit of ventilation designated as a whole by the reference 1 comprises a flat casing 2, of generally parallelepipedal shape in which are housed two linear ventilation turbines said to

tangential flow 3 and 4.

  Ventilation turbines, known per se individually, are arranged in parallel on a

  same plane, side by side, inside the flat housing 2.

  The height H of the latter substantially corresponds to the diameter of the turbines 3 and 4. As a practical example, for a diameter of 30 mm, the height H of

casing 2 is 43 mm.

  In such a case, the casing has a width L of 119 mm and the turbines 3 and 4 housed inside are spaced symmetrically according to a

distance E 60 mm.

  As shown in FIG. 5, when the ventilation unit 1 is in use, the air inlet A in the casing 2 is made under the combined effect of the linear turbines 3 and 4 by a central longitudinal opening 5, provided on a lower face 6 of said casing 2 The lateral edges 7, 8 respectively constitute one of the ends of two tangential linear tangential deflectors 9, 10, arranged laterally in the casing 2 on either side of said central opening 5 and partially enclosing the linear turbines 3, 4 to direct the flow of air generated by each of them to two spaced air outlet mouths 11 and 12 in the form of rectangular longitudinal slots formed on an upper face 13 of the casing 2 The mouths 11 and 12 are parallel to each other Their respective external lateral edges 14 and constitute the other ends of the scrolls

tangential 9 and 10.

  The air flow A, introduced by the lower central opening S, is thus channeled by said volutes 9, 10 to the upper mouths 11, 12

  constituting individual outputs for each stream.

  The driving of the turbines 3, 4 of a ventilation unit thus constituted is effected by means of two electric motors 16, 17 connected by electric wires 18, 19 to a supply. The motors 16, 17 are of the same power and controlled in the same direction of rotation and form with the turbines 3, 4 of the self-propelling assemblies

independent and identical.

  They are arranged head to tail in the casing 2 in such a way as to obtain opposite and divergent relative rotational directions inside the casing 2 in order to channel, as described above, the common air inlet flow A towards the spaced outlet mouths 11, 12, via the deflectors

lateral linear 9, 10.

  The directions of rotation are materialized by

arrows.

  As shown in FIGS. 2 and 4, the electric motors 16, 17 of the linear turbines 3, 4 are arranged outside the casing 2, on two end walls 20, 21 of the latter, each of these walls being perpendicular both to the plane in which the turbines 3, 4 are located and to their axis

longitudinal.

  Each of the walls 20, 21 comprises a

  coupling and a bearing (not visible).

  The coupling is intended for one of the driving motors 16 or 17 of one of the turbines 3 or 4 and the opposite bearing is intended for the free end 22 or 23 of a support shaft of the other turbine 3 or 4, climb

in opposition to the first.

  The walls 20, 21 forming a bearing are made in two offset planes 24, 25 parallel to each other to form a reentrant shoulder 26, able to constitute a housing for each motor 16, 17 so that they fit into a volume

substantially parallelepipedic.

  Thus, as shown in FIGS. 1 and 3, the air outlet mouths 11, 12 made on the upper face 13 of the casing 2 are offset longitudinally with respect to each other to be located at the Plumbed turbines 3, 4 mounted head-to-tail

  and with regard only to these.

  In order to constitute a self-supporting frame, the housing 2 is extended at its ends by two transverse tabs 27, 28 perforated by fixing holes 29, 30, 31, 32 executed at their respective angles to allow its implementation on two parallel bars or slides 33, 34 of a compartment located in the lower part of a semi-closed enclosure. The mouths 11 and 12 of air outlet are bordered longitudinally, each on the opposite side to that of the upper limit of each volute, by a linear shape 35, 36 projecting downwards, for example in the manner of a gutter, intended to avoid

the turbulence of the air flow.

  As indicated according to the preferred application, the compartment is a cabinet 37 having a lower portion 38 in which is housed the ventilation unit according to the invention in an approximate central position This cabinet has superposed shelves such as 39 supporting drawers 40 or baskets 41 filled with cards such as 42 or 43 representing as many electronic circuits formed of active components dissipating calories that must be evacuated. The ventilation unit according to the invention

  represents the ideal solution for this type of set.

  It is understood that beyond the means described, various obvious modifications and variants

  simple are within the scope of the present invention.

Claims (6)

  1 ventilation unit (1), in particular for technical compartment, characterized in that it comprises two linear ventilation turbines (3 and 4) tangential double flow, arranged parallel on the same plane inside a flat housing (2) whose height (H) substantially corresponds to the diameter of the turbines (3 and 4) and which has openings for entry and exit of air, arranged longitudinally on its opposite sides.   2 ventilation unit according to claim 1, characterized in that the air inlet (A) in the housing (2) is effected under the conjugated effect of the linear turbines (3, 4), by a central longitudinal opening (5), formed on a lower face (6) of said housing (2) and whose lateral edges (7, 8) respectively constitute one of the ends of two tangential linear tangential deflectors (9, 10) disposed laterally in the casing (2), on either side of said central opening (5) and partially enveloping the linear turbines (3, 4), to direct the flow of air generated by each of them to two outlets of spaced air (11, 12) in the form of longitudinal slots formed on an upper face (13) of the casing (2) parallel to one another and whose respective outer lateral edges (14, 15) constitute the other ends of the deflectors linear tangential (9, 10).   3 ventilation unit according to claim 2, characterized in that the two linear ventilation turbines (3, 4) are driven by two electric motors (16, 17) of the same power and the same direction of rotation, to form two self-wind turbines -motors independent identical, arranged head to tail in the housing (2), for channeling the common inlet air flow (A) to the outlet mouths (11, 12) spaced through the intermediaries   Lateral tangential linear deflectors (9, 10).   Ventilation unit according to Claim 3, characterized in that the electric drive motors (16, 17) of the linear turbines (3, 4) are arranged outside the housing on two end walls (20, 21). ) thereof, each of these walls (20, 21) being perpendicular both to the plane in which the turbines (3, 4) are located and to their longitudinal axis, to form two bearings, one being intended for the said driving motor of one of the turbines (3, 4) and the other being intended for the free end (22, 23) of the other turbine mounted in opposition to the first.   Ventilation unit according to Claim 4, characterized in that each of the bearing walls (20, 21) is formed in two mutually parallel planes (24, 25) to form a retracting shoulder (26) of the casing (2). , adapted to allow the housing of each drive motor (16, 17) so that they fit into a substantially parallelepiped volume. 6 Ventilation unit according to one of the   preceding claims, characterized in that the   air outlet mouths (11, 12) formed on the upper face (13) of the housing (2) are offset longitudinally with respect to each other for   located vertically above the turbines (3, 4) mounted   spade. 7 Ventilation unit according to one of the   preceding claims, characterized in that the   upper face (13) of the housing (2) is extended at its ends by two transverse tabs (27, 28).   perforated to form a self-supporting carrier. 8 2669970   8 ventilation unit according to claim 7, characterized in that its fixing is provided by means of its frame resting by its transverse tabs (27, 28) on two parallel bars (33, 34) of a lower compartment d 'a   cabinet (37) containing electrical cards.