EP2557909A1 - Electronic system including a stationary structure comprising a housing for protecting electronic equipment and a mobile structure relative to the stationary structure, the mobile structure comprising an opening for sucking in air - Google Patents

Electronic system including a stationary structure comprising a housing for protecting electronic equipment and a mobile structure relative to the stationary structure, the mobile structure comprising an opening for sucking in air Download PDF

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Publication number
EP2557909A1
EP2557909A1 EP12172199A EP12172199A EP2557909A1 EP 2557909 A1 EP2557909 A1 EP 2557909A1 EP 12172199 A EP12172199 A EP 12172199A EP 12172199 A EP12172199 A EP 12172199A EP 2557909 A1 EP2557909 A1 EP 2557909A1
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EP
European Patent Office
Prior art keywords
fixed structure
housing
mobile
air
electronic equipment
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.)
Withdrawn
Application number
EP12172199A
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German (de)
French (fr)
Inventor
Christophe Vedel
Olivier Dez
Nicolas Berbier
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Thales SA
Original Assignee
Thales SA
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Filing date
Publication date
Application filed by Thales SA filed Critical Thales SA
Publication of EP2557909A1 publication Critical patent/EP2557909A1/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/04—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/02—Arrangements for de-icing; Arrangements for drying-out ; Arrangements for cooling; Arrangements for preventing corrosion

Definitions

  • the invention particularly relates to a radar comprising a rotating antenna, wherein the mobile structure comprises the rotating antenna.
  • Rotating antenna radar comprising a fixed structure comprising a vertical median axis, and a structure movable in rotation about the vertical axis relative to the fixed structure.
  • the fixed structure includes a hermetically sealed housing and electronic equipment disposed within the housing.
  • the fixed structure comprises means for rotating the mobile structure, said drive means being arranged inside the housing.
  • the mobile structure comprises the rotating antenna.
  • the housing is made of a thermally conductive material.
  • the cooling of the electronic equipment arranged inside the housing is obtained, on the one hand, by thermal conduction of the interior of the housing to the outside via the thermally conductive wall of the housing, the temperature being higher inside the housing than outside, and secondly, by thermal convection due to the movement of air in contact with the outer surface of the housing.
  • the object of the invention is therefore to provide an electronic system for improving the cooling of electronic equipment disposed within the fixed structure.
  • the subject of the invention is an electronic system of the aforementioned type, characterized in that the mobile structure comprises at least one opening forming means of suctioning air from the outside of the envelope towards the inside. of the envelope when the mobile structure is moving relative to the fixed structure, to cool the electronic equipment.
  • the invention also relates to a radar, as an electronic system as defined above, comprising a rotating antenna, wherein the mobile structure comprises the rotating antenna.
  • an electronic system 10 such as a rotating antenna radar, comprises a fixed structure 12 and a movable structure 14 able to move relative to the fixed structure.
  • the movement of the movable structure 14 with respect to the fixed structure 12 is a rotational movement. More specifically, the mobile structure 14 is rotatable about a vertical median axis Z of the fixed structure (arrow R).
  • the rotational speed of the movable structure 14 with respect to the fixed structure 12 is less than one revolution per second, and is, for example, equal to two radians per second.
  • the fixed structure 12 comprises a protective envelope 16 and electronic equipment, not shown, arranged inside the protective envelope 16.
  • the fixed structure 12 also comprises a housing 18, visible on the figure 2 , arranged inside the protective envelope 16, the electronic equipment being themselves arranged inside the housing 18.
  • the fixed structure 12 comprises an upper opening 20 forming an air inlet and at least one orifice 22 of air outlet, visible on the figure 1 , as well as means 24 for guiding air between the upper opening 20 and the outlet orifice 22, as shown in FIG. figure 2 .
  • the fixed structure 12 comprises, for example, four outlet orifices 22.
  • the mobile structure 14 comprises according to the invention at least one opening 26 forming means of suction of the air from the outside of the envelope 16 towards the inside of the envelope, when the mobile structure 14 is in motion by to the fixed structure. 12.
  • the mobile structure 14 has a plurality of suction openings 26.
  • the mobile structure 14 comprises a fairing 28 forming a closure means of the upper opening 20 of the fixed structure.
  • the mobile structure 14 comprises a blade 30 for each suction opening 26, as shown in FIG. figure 1 .
  • the mobile structure 14 also comprises a rotating antenna 31 known per se.
  • the protective casing 16 comprises flat lateral walls 32 and curved lateral walls 33, with a spacing between a successive flat wall 32 and a curved wall 33, in order to form an outlet orifice 22 corresponding between the successive walls 32, 33 .
  • the protective casing 16 is intended to protect the casing 18 from external climatic conditions, such as spray, sand, or other winds.
  • the protective casing 16 has a reduced thickness, lower than that of the casing 18.
  • the protective envelope 16 is, for example, made of composite material.
  • the protective casing 16 is made of plastic, or from flanks of shaped sheet metal according to the desired profile.
  • the housing 18 is hermetically sealed to provide additional protection for electronic equipment disposed within the housing.
  • the housing 18 is particularly airtight so as not to allow air to enter the interior of the housing.
  • the casing 18 is in the form of a cylinder with two diametrically opposite lateral plane faces and has a side wall 34, an upper wall 36 and a bottom wall 38.
  • the side wall 34 has the two diametrically opposite planar faces.
  • the walls 34, 36, 38 of the housing have a thickness greater than that of the protective envelope 16, the housing 18 ensuring the structural maintenance of the electronic system.
  • the upper opening 20 is formed by the upper edge of the side walls 32, 33 of the protective envelope.
  • the upper opening 20 is, for example, arranged in a substantially horizontal plane P, visible on the figure 2 .
  • the outlet orifices 22 are essentially arranged in the lower part of the fixed structure 12, away from the upper opening 20.
  • each outlet orifice 22 is in the form of a gap arranged between a flat wall 32 and a curved wall 33 respectively of the protective envelope.
  • the air outlet orifices 22 are in the form of vents, for example arranged in the lower part of two diametrically opposed flat walls 32 of the protective envelope.
  • the air outlet orifices 22 are in the form of through holes formed in the curved walls 33 and / or in the flat walls 32, preferably in their lower part.
  • the guide means 24 are adapted to guide the air received through the upper opening 20 from the suction openings to the air outlet orifices 22.
  • the guide means 24 comprise the outer surface of the housing 18 and the inner surface of the protective envelope 16, the latter being opposite each other.
  • Each suction opening 26 is arranged in the fairing 28 of the mobile structure.
  • the suction openings 26 are, for example, angularly distributed around the vertical median axis Z.
  • the suction openings 26 have dimensions such that the air flow generated inside the envelope 16 causes a lowering of the temperature at least 10 ° Celsius for a rotational speed of the mobile structure 14 less than one turn per second.
  • the fairing 28 is arranged in the lower part of the mobile structure 14.
  • the fairing 28 comprises a circular ring 40, in which are arranged the suction openings 26 and the vanes 30.
  • Each blade 30 has, in addition to the suction openings 26, dimensions such that the air flow generated inside the casing 16 causes the temperature to be lowered by at least 10 ° Celsius at a speed of rotation of the mobile structure 14 less than one turn per second.
  • Each blade 30 is oriented forwardly with respect to the direction of rotation (arrow R) of the movable structure 14 relative to the fixed structure 12, as shown in FIG. figure 1 .
  • the blades 30 are then also called action blades, the ventilation due to the blades 30 and resulting from the rotational movement of the movable structure 14 being an action ventilation.
  • the blades 30 are, for example, made of composite material. Alternatively, the blades 30 are made of plastic, or from flanks of sheet metal.
  • the side walls 32, 33 are substantially vertical.
  • the flat 32 and curved walls 33 are, for example, alternated along the periphery of the envelope 16 around the vertical axis Z.
  • Each plane wall 32 is offset laterally with respect to the two adjacent curved walls 33 so as to form a corresponding outlet orifice 22 which is compatible with the necessary air flow rate.
  • the value of the necessary air flow rate is greater than or equal to 50 m 3 per hour, preferably equal to 55 m 3 per hour.
  • the offset between the plane wall 32 and the two adjacent curved walls 33 is greater in the lower part of the envelope 16 than in the upper part.
  • the area of the outlet orifice 22 is mainly in the lower part of the envelope, so that the air outlet is essentially disposed away from the upper opening 20, to promote the convection of air along the case 18.
  • the air is then guided by the guiding means 24 from the upper opening 20 to the air outlet orifices 22 of the fixed structure, between the housing 18 and the protective envelope 16 (arrow F2), and more precisely along the housing 18.
  • the air is finally expelled through the outlets 22 (arrow F3).
  • the suction means and the guide means generate, during the movement of the mobile structure 14 relative to the fixed structure 12, a forced convection of air along the housing 18 enclosing the electronic equipment, which allows to improve the thermal cooling of these electronic equipment.
  • the protective envelope 16 protects the housing 18 from the solar radiation, and also limits the thermal heating of said housing 18.
  • the electronic system 10 makes it possible to benefit from forced convection of air, in the absence of an additional fan disposed inside the casing, the suction means and the guiding means forming themselves a fan.
  • This thermal cooling solution for electronic equipment is therefore particularly economical, since it benefits from the movement of the mobile structure relative to the fixed structure, this movement being moreover essential for the operation of the electronic system.
  • the electronic system 10 according to the invention does not require the addition of additional means of movement training.
  • the thermal cooling due to the forced convection through the suction openings 26 is particularly effective, since the temperature inside the casing 16 is decreased by at least 10 ° C. for a rotation speed of the moving structure. 14 relative to the fixed structure less than one revolution per second, for example equal to two radians per second.
  • the electronic system 10 makes it possible to improve the thermal cooling of the electronic equipment arranged inside the protective envelope, while not entailing additional cost.

Abstract

The system has a fixed structure including electronic equipment that is positioned inside a protective casing (16). A mobile structure moves relative to the fixed structure. An aperture forming unit of the mobile structure is utilized for suction of air from the outside of the casing toward the inside of the casing when the mobile structure moves relative to the fixed structure to cool the equipment. A fairing forming unit of the mobile structure obturates an upper aperture of the fixed structure. A suction aperture is made in the fairing of the mobile structure.

Description

La présente invention concerne un système électronique du type comprenant:

  • une structure fixe comportant une enveloppe de protection et des équipements électroniques disposés à l'intérieur de l'enveloppe de protection, et
  • une structure mobile, propre à effectuer un mouvement par rapport à la structure fixe.
The present invention relates to an electronic system of the type comprising:
  • a fixed structure comprising a protective envelope and electronic equipment arranged inside the protective envelope, and
  • a movable structure capable of moving relative to the fixed structure.

L'invention concerne notamment un radar comprenant une antenne tournante, dans lequel la structure mobile comporte l'antenne tournante.The invention particularly relates to a radar comprising a rotating antenna, wherein the mobile structure comprises the rotating antenna.

On connaît un radar à antenne tournante comprenant une structure fixe comportant un axe médian vertical, et une structure mobile en rotation autour de l'axe vertical par rapport à la structure fixe. La structure fixe comporte un boîtier fermé hermétiquement et des équipements électroniques disposés à l'intérieur du boîtier. La structure fixe comporte des moyens d'entraînement en rotation de la structure mobile, lesdits moyens d'entraînement étant agencés à l'intérieur du boîtier. La structure mobile comporte l'antenne tournante. Le boîtier est réalisé en un matériau thermiquement conducteur.Rotating antenna radar is known comprising a fixed structure comprising a vertical median axis, and a structure movable in rotation about the vertical axis relative to the fixed structure. The fixed structure includes a hermetically sealed housing and electronic equipment disposed within the housing. The fixed structure comprises means for rotating the mobile structure, said drive means being arranged inside the housing. The mobile structure comprises the rotating antenna. The housing is made of a thermally conductive material.

Lors du fonctionnement du radar, le refroidissement des équipements électroniques disposés à l'intérieur du boîtier est obtenu, d'une part, par conduction thermique de l'intérieur du boîtier vers l'extérieur via la paroi thermiquement conductrice du boîtier, la température étant plus élevée à l'intérieur du boîtier qu'à l'extérieur, et d'autre part, par convection thermique due au mouvement de l'air en contact avec la surface extérieure du boîtier.During the operation of the radar, the cooling of the electronic equipment arranged inside the housing is obtained, on the one hand, by thermal conduction of the interior of the housing to the outside via the thermally conductive wall of the housing, the temperature being higher inside the housing than outside, and secondly, by thermal convection due to the movement of air in contact with the outer surface of the housing.

Toutefois, un tel système électronique ne permet pas un refroidissement thermique suffisant des équipements électroniques dont la température augmente progressivement durant le fonctionnement du système. Un tel échauffement est susceptible de limiter la durée de vie des équipements électroniques, voire d'entraîner leur défaillance.However, such an electronic system does not allow sufficient thermal cooling of electronic equipment whose temperature increases gradually during the operation of the system. Such heating is likely to limit the life of electronic equipment or even to cause their failure.

Le but de l'invention est donc de proposer un système électronique permettant d'améliorer le refroidissement des équipements électroniques disposés à l'intérieur de la structure fixe.The object of the invention is therefore to provide an electronic system for improving the cooling of electronic equipment disposed within the fixed structure.

A cet effet, l'invention a pour objet un système électronique du type précité, caractérisé en ce que la structure mobile comporte au moins une ouverture formant moyen d'aspiration de l'air depuis l'extérieur de l'enveloppe vers l'intérieur de l'enveloppe lorsque la structure mobile est en mouvement par rapport à la structure fixe, afin de refroidir les équipements électroniques.To this end, the subject of the invention is an electronic system of the aforementioned type, characterized in that the mobile structure comprises at least one opening forming means of suctioning air from the outside of the envelope towards the inside. of the envelope when the mobile structure is moving relative to the fixed structure, to cool the electronic equipment.

Suivant d'autres modes de réalisation, le système électronique comprend une ou plusieurs des caractéristiques suivantes prise(s) isolément ou suivant toutes les combinaisons techniquement possibles :

  • le mouvement de la structure mobile par rapport à la structure fixe est un mouvement de rotation,
  • la structure mobile comporte une pluralité d'ouvertures formant moyens d'aspiration de l'air,
  • la structure fixe comporte une ouverture supérieure, et la structure mobile comporte un carénage formant moyen d'obturation de l'ouverture supérieure, et la ou chaque ouverture d'aspiration est agencée dans le carénage de la structure mobile,
  • la structure fixe comporte un boitier à l'intérieur duquel les équipements électroniques sont disposés, le boitier étant agencé à l'intérieur de l'enveloppe de protection, et la structure fixe comporte des moyens de guidage de l'air reçu des moyens d'aspiration entre le boitier et l'enveloppe de protection,
  • le boitier est fermé hermétiquement,
  • la structure fixe comporte en outre au moins un orifice de sortie de l'air aspiré par les moyens d'aspiration,
  • la structure mobile comporte une aube pour la ou chaque ouverture d'aspiration, et
  • la ou chaque aube est orientée vers l'avant vis-à-vis du sens de rotation de la structure mobile par rapport à la structure fixe.
According to other embodiments, the electronic system comprises one or more of the following characteristics taken individually or in any technically possible combination:
  • the movement of the mobile structure relative to the fixed structure is a rotational movement,
  • the mobile structure comprises a plurality of openings forming air suction means,
  • the fixed structure comprises an upper opening, and the movable structure comprises a fairing forming a closure means of the upper opening, and the or each suction opening is arranged in the fairing of the movable structure,
  • the fixed structure comprises a housing inside which the electronic equipment is arranged, the housing being arranged inside the protective envelope, and the fixed structure comprises means for guiding the air received from the means of suction between the housing and the protective envelope,
  • the case is hermetically closed,
  • the fixed structure further comprises at least one air outlet port sucked by the suction means,
  • the mobile structure comprises a blade for the or each suction opening, and
  • the or each blade is oriented forwardly with respect to the direction of rotation of the movable structure relative to the fixed structure.

L'invention a également pour objet un radar, en tant que système électronique tel que défini ci-dessus, comprenant une antenne tournante, dans lequel la structure mobile comporte l'antenne tournante.The invention also relates to a radar, as an electronic system as defined above, comprising a rotating antenna, wherein the mobile structure comprises the rotating antenna.

Ces caractéristiques et avantages de l'invention apparaîtront à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple, et faite en référence aux dessins annexés, sur lesquels :

  • la figure 1 est une vue en perspective d'un radar selon l'invention, et
  • la figure 2 est une vue en coupe selon le plan II de la figure 1.
These features and advantages of the invention will appear on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which:
  • the figure 1 is a perspective view of a radar according to the invention, and
  • the figure 2 is a sectional view according to plan II of the figure 1 .

Sur la figure 1, un système électronique 10, tel qu'un radar à antenne tournante, comprend une structure fixe 12 et une structure mobile 14 propre à effectuer un mouvement par rapport à la structure fixe.On the figure 1 , an electronic system 10, such as a rotating antenna radar, comprises a fixed structure 12 and a movable structure 14 able to move relative to the fixed structure.

Dans l'exemple de réalisation de la figure 1, le mouvement de la structure mobile 14 par rapport à la structure fixe 12 est un mouvement de rotation. Plus précisément, la structure mobile 14 est mobile en rotation autour d'un axe médian vertical Z de la structure fixe (flèche R).In the exemplary embodiment of the figure 1 the movement of the movable structure 14 with respect to the fixed structure 12 is a rotational movement. More specifically, the mobile structure 14 is rotatable about a vertical median axis Z of the fixed structure (arrow R).

La vitesse de rotation de la structure mobile 14 par rapport à la structure fixe 12 est inférieure à un tour par seconde, et est, par exemple, égale à deux radians par seconde.The rotational speed of the movable structure 14 with respect to the fixed structure 12 is less than one revolution per second, and is, for example, equal to two radians per second.

La structure fixe 12 comporte une enveloppe de protection 16 et des équipements électroniques, non représentés, disposés à l'intérieur de l'enveloppe de protection 16. Dans l'exemple de réalisation des figures 1 et 2, la structure fixe 12 comporte également un boîtier 18, visible sur la figure 2, agencé à l'intérieur de l'enveloppe de protection 16, les équipements électroniques étant eux-mêmes disposés à l'intérieur du boîtier 18.The fixed structure 12 comprises a protective envelope 16 and electronic equipment, not shown, arranged inside the protective envelope 16. In the exemplary embodiment of FIGS. figures 1 and 2 , the fixed structure 12 also comprises a housing 18, visible on the figure 2 , arranged inside the protective envelope 16, the electronic equipment being themselves arranged inside the housing 18.

La structure fixe 12 comporte une ouverture supérieure 20 formant entrée d'air et au moins un orifice 22 de sortie d'air, visibles sur la figure 1, ainsi que des moyens 24 de guidage de l'air entre l'ouverture supérieure 20 et l'orifice de sortie 22, comme représenté sur la figure 2.The fixed structure 12 comprises an upper opening 20 forming an air inlet and at least one orifice 22 of air outlet, visible on the figure 1 , as well as means 24 for guiding air between the upper opening 20 and the outlet orifice 22, as shown in FIG. figure 2 .

La structure fixe 12 comporte, par exemple, quatre orifices de sortie 22.The fixed structure 12 comprises, for example, four outlet orifices 22.

La structure mobile 14 comporte selon l'invention au moins une ouverture 26 formant moyen d'aspiration de l'air depuis l'extérieur de l'enveloppe 16 vers l'intérieur de l'enveloppe, lorsque la structure mobile 14 est en mouvement par rapport à la structure fixe 12. Dans l'exemple de réalisation des figures 1 et 2, la structure mobile 14 comporte une pluralité d'ouvertures d'aspiration 26.The mobile structure 14 comprises according to the invention at least one opening 26 forming means of suction of the air from the outside of the envelope 16 towards the inside of the envelope, when the mobile structure 14 is in motion by to the fixed structure. 12. In the exemplary embodiment of the figures 1 and 2 the mobile structure 14 has a plurality of suction openings 26.

La structure mobile 14 comporte un carénage 28 formant moyen d'obturation de l'ouverture supérieure 20 de la structure fixe.The mobile structure 14 comprises a fairing 28 forming a closure means of the upper opening 20 of the fixed structure.

En complément, la structure mobile 14 comporte une aube 30 pour chaque ouverture d'aspiration 26, comme représenté sur la figure 1.In addition, the mobile structure 14 comprises a blade 30 for each suction opening 26, as shown in FIG. figure 1 .

Dans l'exemple de réalisation des figures 1 et 2 où le système électronique 10 est un radar à antenne tournante, la structure mobile 14 comporte également une antenne tournante 31 connue en soi.In the exemplary embodiment of figures 1 and 2 where the electronic system 10 is a rotating antenna radar, the mobile structure 14 also comprises a rotating antenna 31 known per se.

L'enveloppe de protection 16 comporte des parois latérales planes 32 et des parois latérales incurvées 33, avec un espacement entre une paroi plane 32 et une paroi incurvée 33 successives, afin de former un orifice de sortie 22 correspondant entre les parois 32, 33 successives.The protective casing 16 comprises flat lateral walls 32 and curved lateral walls 33, with a spacing between a successive flat wall 32 and a curved wall 33, in order to form an outlet orifice 22 corresponding between the successive walls 32, 33 .

L'enveloppe de protection 16 est destinée à protéger le boîtier 18 des conditions climatiques extérieures, telles que des embruns, des vents de sable, ou autres.The protective casing 16 is intended to protect the casing 18 from external climatic conditions, such as spray, sand, or other winds.

L'enveloppe de protection 16 présente une épaisseur réduite, inférieure à celle du boîtier 18.The protective casing 16 has a reduced thickness, lower than that of the casing 18.

L'enveloppe de protection 16 est, par exemple, réalisée en matière composite. En variante, l'enveloppe de protection 16 est réalisée en matière plastique, ou encore à partir de flancs de tôle mis en forme selon le profil souhaité. Le boîtier 18 est fermé hermétiquement afin d'assurer une protection supplémentaire des équipements électroniques disposés à l'intérieur du boîtier. Le boîtier 18 est notamment hermétique à l'air afin de ne pas laisser entrer d'air à l'intérieur du boîtier.The protective envelope 16 is, for example, made of composite material. Alternatively, the protective casing 16 is made of plastic, or from flanks of shaped sheet metal according to the desired profile. The housing 18 is hermetically sealed to provide additional protection for electronic equipment disposed within the housing. The housing 18 is particularly airtight so as not to allow air to enter the interior of the housing.

Le boîtier 18 est en forme d'un cylindre avec deux faces planes latérales diamétralement opposées et comporte une paroi latérale 34, une paroi supérieure 36 et une paroi inférieure 38. La paroi latérale 34 comporte les deux faces planes diamétralement opposées. Les parois 34, 36, 38 du boîtier présentent une épaisseur supérieure à celle de l'enveloppe de protection 16, le boîtier 18 assurant le maintien structurel du système électronique.The casing 18 is in the form of a cylinder with two diametrically opposite lateral plane faces and has a side wall 34, an upper wall 36 and a bottom wall 38. The side wall 34 has the two diametrically opposite planar faces. The walls 34, 36, 38 of the housing have a thickness greater than that of the protective envelope 16, the housing 18 ensuring the structural maintenance of the electronic system.

L'ouverture supérieure 20 est formée par le bord supérieur des parois latérales 32, 33 de l'enveloppe de protection. L'ouverture supérieure 20 est, par exemple, disposée dans un plan sensiblement horizontal P, visible sur la figure 2.The upper opening 20 is formed by the upper edge of the side walls 32, 33 of the protective envelope. The upper opening 20 is, for example, arranged in a substantially horizontal plane P, visible on the figure 2 .

Les orifices de sortie 22 sont essentiellement disposés en partie inférieure de la structure fixe 12, à l'écart de l'ouverture supérieure 20.The outlet orifices 22 are essentially arranged in the lower part of the fixed structure 12, away from the upper opening 20.

Dans l'exemple de réalisation des figures 1 et 2, chaque orifice de sortie 22 est en forme d'un interstice agencé entre une paroi plane 32 et une paroi incurvée 33 respectives de l'enveloppe de protection.In the exemplary embodiment of figures 1 and 2 , each outlet orifice 22 is in the form of a gap arranged between a flat wall 32 and a curved wall 33 respectively of the protective envelope.

En variante ou en complément, les orifices de sortie d'air 22 sont en forme d'ouïes d'aération, par exemple agencées en partie inférieure de deux parois planes 32 diamétralement opposées de l'enveloppe de protection.Alternatively or additionally, the air outlet orifices 22 are in the form of vents, for example arranged in the lower part of two diametrically opposed flat walls 32 of the protective envelope.

En variante ou en complément, les orifices de sortie d'air 22 sont en forme de trous traversants ménagés dans les parois incurvées 33 et/ou dans les parois planes 32, de préférence dans leur partie inférieure.Alternatively or in addition, the air outlet orifices 22 are in the form of through holes formed in the curved walls 33 and / or in the flat walls 32, preferably in their lower part.

Les moyens de guidage 24 sont propres à guider l'air reçu à travers l'ouverture supérieure 20 depuis les ouvertures d'aspiration, jusqu'aux orifices de sortie d'air 22. Les moyens de guidage 24 comportent la surface extérieure du boîtier 18 et la surface intérieure de l'enveloppe de protection 16, celles-ci étant en regard l'une de l'autre.The guide means 24 are adapted to guide the air received through the upper opening 20 from the suction openings to the air outlet orifices 22. The guide means 24 comprise the outer surface of the housing 18 and the inner surface of the protective envelope 16, the latter being opposite each other.

Chaque ouverture d'aspiration 26 est agencée dans le carénage 28 de la structure mobile.Each suction opening 26 is arranged in the fairing 28 of the mobile structure.

Les ouvertures d'aspiration 26 sont, par exemple, angulairement réparties autour de l'axe médian vertical Z.The suction openings 26 are, for example, angularly distributed around the vertical median axis Z.

Les ouvertures d'aspiration 26 présentent des dimensions telles que la circulation d'air générée à l'intérieur de l'enveloppe 16 engendre un abaissement de la température d'au moins 10° Celsius pour une vitesse de rotation de la structure mobile 14 inférieure à un tour par seconde.The suction openings 26 have dimensions such that the air flow generated inside the envelope 16 causes a lowering of the temperature at least 10 ° Celsius for a rotational speed of the mobile structure 14 less than one turn per second.

Le carénage 28 est disposé en partie inférieure de la structure mobile 14. Le carénage 28 comporte une couronne circulaire 40, dans laquelle sont agencées les ouvertures d'aspiration 26 et les aubes 30.The fairing 28 is arranged in the lower part of the mobile structure 14. The fairing 28 comprises a circular ring 40, in which are arranged the suction openings 26 and the vanes 30.

Chaque aube 30 présente, en complément des ouvertures d'aspiration 26, des dimensions telles que la circulation d'air générée à l'intérieur de l'enveloppe 16 entraîne un abaissement de la température d'au moins 10 ° Celsius pour une vitesse de rotation de la structure mobile 14 inférieure à un tour par seconde.Each blade 30 has, in addition to the suction openings 26, dimensions such that the air flow generated inside the casing 16 causes the temperature to be lowered by at least 10 ° Celsius at a speed of rotation of the mobile structure 14 less than one turn per second.

Chaque aube 30 est orientée vers l'avant vis-à-vis du sens de rotation (flèche R) de la structure mobile 14 par rapport à la structure fixe 12, comme représenté sur la figure 1. Les aubes 30 sont alors également appelées aubes à action, la ventilation due aux aubes 30 et résultant du mouvement de rotation de la structure mobile 14 étant une ventilation à action.Each blade 30 is oriented forwardly with respect to the direction of rotation (arrow R) of the movable structure 14 relative to the fixed structure 12, as shown in FIG. figure 1 . The blades 30 are then also called action blades, the ventilation due to the blades 30 and resulting from the rotational movement of the movable structure 14 being an action ventilation.

Les aubes 30 sont, par exemple, réalisées en matière composite. En variante, les aubes 30 sont réalisées en matière plastique, ou encore à partir de flancs de tôle.The blades 30 are, for example, made of composite material. Alternatively, the blades 30 are made of plastic, or from flanks of sheet metal.

Les parois latérales 32, 33 sont sensiblement verticales. Les parois planes 32 et incurvées 33 sont, par exemple, alternées le long de la périphérie de l'enveloppe 16 autour de l'axe vertical Z.The side walls 32, 33 are substantially vertical. The flat 32 and curved walls 33 are, for example, alternated along the periphery of the envelope 16 around the vertical axis Z.

Chaque paroi plane 32 est décalée latéralement par rapport aux deux parois incurvées 33 voisines, afin de former un orifice de sortie 22 correspondant compatible du débit de circulation d'air nécessaire. La valeur du débit de circulation d'air nécessaire est supérieure ou égale à 50 m3 par heure, de préférence égale à 55 m3 par heure.Each plane wall 32 is offset laterally with respect to the two adjacent curved walls 33 so as to form a corresponding outlet orifice 22 which is compatible with the necessary air flow rate. The value of the necessary air flow rate is greater than or equal to 50 m 3 per hour, preferably equal to 55 m 3 per hour.

Le décalage entre la paroi plane 32 et les deux parois incurvées 33 voisines est plus important en partie inférieure de l'enveloppe 16 qu'en partie supérieure. Autrement dit, l'aire de l'orifice de sortie 22 est majoritairement en partie inférieure de l'enveloppe, afin que la sortie d'air soit essentiellement disposée à l'écart de l'ouverture supérieure 20, pour favoriser la convection d'air le long du boitier 18.The offset between the plane wall 32 and the two adjacent curved walls 33 is greater in the lower part of the envelope 16 than in the upper part. In other words, the area of the outlet orifice 22 is mainly in the lower part of the envelope, so that the air outlet is essentially disposed away from the upper opening 20, to promote the convection of air along the case 18.

Ainsi, lorsque le système électronique 10 selon l'invention est en fonctionnement et que la structure mobile 14 est en mouvement, par exemple en rotation, par rapport à la structure fixe 12, l'air est aspiré via les ouvertures d'aspiration 26 et les aubes 30 depuis l'extérieur de l'enveloppe 16 vers l'intérieur de celle-ci (flèche F1).Thus, when the electronic system 10 according to the invention is in operation and the mobile structure 14 is in motion, for example in rotation, with respect to the fixed structure 12, the air is sucked via the suction openings 26 and the blades 30 from the outside of the casing 16 towards the inside thereof (arrow F1).

L'air est alors guidé par les moyens de guidage 24 depuis l'ouverture supérieure 20 jusqu'aux orifices de sortie d'air 22 de la structure fixe, entre le boîtier 18 et l'enveloppe de protection 16 (flèche F2), et plus précisément le long du boîtier 18. L'air est enfin expulsé à travers les orifices de sortie 22 (flèche F3).The air is then guided by the guiding means 24 from the upper opening 20 to the air outlet orifices 22 of the fixed structure, between the housing 18 and the protective envelope 16 (arrow F2), and more precisely along the housing 18. The air is finally expelled through the outlets 22 (arrow F3).

Autrement dit, les moyens d'aspiration et les moyens de guidage engendrent, lors du mouvement de la structure mobile 14 par rapport à la structure fixe 12, une convection forcée d'air le long du boîtier 18 renfermant les équipements électroniques, ce qui permet d'améliorer le refroidissement thermique de ces équipements électroniques.In other words, the suction means and the guide means generate, during the movement of the mobile structure 14 relative to the fixed structure 12, a forced convection of air along the housing 18 enclosing the electronic equipment, which allows to improve the thermal cooling of these electronic equipment.

En outre, l'enveloppe de protection 16 protège le boîtier 18 du rayonnement solaire, et limite également l'échauffement thermique dudit boîtier 18.In addition, the protective envelope 16 protects the housing 18 from the solar radiation, and also limits the thermal heating of said housing 18.

Le système électronique 10 selon l'invention permet de bénéficier d'une convection forcée d'air, en l'absence d'un ventilateur additionnel disposé à l'intérieur de l'enveloppe, les moyens d'aspiration et les moyens de guidage formant eux-mêmes un ventilateur.The electronic system 10 according to the invention makes it possible to benefit from forced convection of air, in the absence of an additional fan disposed inside the casing, the suction means and the guiding means forming themselves a fan.

Cette solution de refroidissement thermique des équipements électroniques est donc particulièrement économique, puisqu'elle bénéficie du mouvement de la structure mobile par rapport à la structure fixe, ce mouvement étant par ailleurs indispensable au fonctionnement du système électronique. Le système électronique 10 selon l'invention ne nécessite pas l'ajout de moyens supplémentaires d'entraînement en mouvement.This thermal cooling solution for electronic equipment is therefore particularly economical, since it benefits from the movement of the mobile structure relative to the fixed structure, this movement being moreover essential for the operation of the electronic system. The electronic system 10 according to the invention does not require the addition of additional means of movement training.

Le refroidissement thermique dû à la convection forcée de par les ouvertures d'aspiration 26 est particulièrement efficace, puisque la température à l'intérieur de l'enveloppe 16 est diminuée d'au moins 10° Celsius pour une vitesse de rotation de la structure mobile 14 par rapport à la structure fixe inférieure à un tour par seconde, par exemple égale à deux radians par seconde.The thermal cooling due to the forced convection through the suction openings 26 is particularly effective, since the temperature inside the casing 16 is decreased by at least 10 ° C. for a rotation speed of the moving structure. 14 relative to the fixed structure less than one revolution per second, for example equal to two radians per second.

On conçoit ainsi que le système électronique 10 selon l'invention permet d'améliorer le refroidissement thermique des équipements électroniques disposés à l'intérieur de l'enveloppe de protection, tout en n'entraînant pas de surcoût.It is thus conceivable that the electronic system 10 according to the invention makes it possible to improve the thermal cooling of the electronic equipment arranged inside the protective envelope, while not entailing additional cost.

Claims (9)

Système électronique (10) du type comprenant : - une structure fixe (12) comportant une enveloppe de protection (16) et des équipements électroniques disposés à l'intérieur de l'enveloppe de protection (16), - une structure mobile (14), propre à effectuer un mouvement par rapport à la structure fixe (12), la structure mobile (14) comportant au moins une ouverture (26) formant moyen d'aspiration de l'air depuis l'extérieur de l'enveloppe (16) vers l'intérieur de l'enveloppe (16) lorsque la structure mobile (14) est en mouvement par rapport à la structure fixe (12), afin de refroidir les équipements électroniques,
caractérisé en ce que la structure fixe (12) comporte une ouverture supérieure (20), et la structure mobile (14) comporte un carénage (28) formant moyen d'obturation de l'ouverture supérieure (20), et en ce que la ou chaque ouverture d'aspiration (26) est agencée dans le carénage (28) de la structure mobile. Electronic system (10) of the type comprising: a fixed structure (12) comprising a protective envelope (16) and electronic equipment arranged inside the protective envelope (16), - A movable structure (14), adapted to perform a movement relative to the fixed structure (12), the movable structure (14) having at least one opening (26) forming air suction means from outside from the envelope (16) towards the interior of the envelope (16) when the mobile structure (14) is moving relative to the fixed structure (12), in order to cool the electronic equipment,
characterized in that the fixed structure (12) has an upper opening (20), and the movable structure (14) has a fairing (28) forming a closure means for the upper opening (20), and in that the or each suction opening (26) is arranged in the fairing (28) of the movable structure. Système (10) selon la revendication 1, dans lequel le mouvement de la structure mobile (14) par rapport à la structure fixe (12) est un mouvement de rotation (R).System (10) according to claim 1, wherein the movement of the movable structure (14) relative to the fixed structure (12) is a rotational movement (R). Système (10) selon la revendication 1 ou 2, dans lequel la structure mobile (14) comporte une pluralité d'ouvertures (26) formant moyens d'aspiration de l'air.System (10) according to claim 1 or 2, wherein the movable structure (14) comprises a plurality of openings (26) forming air suction means. Système (10) selon l'une quelconque des revendications précédentes, dans lequel la structure fixe (12) comporte un boitier (18) à l'intérieur duquel les équipements électroniques sont disposés, le boitier (18) étant agencé à l'intérieur de l'enveloppe de protection (16), et la structure fixe (12) comporte des moyens (24) de guidage de l'air reçu des moyens d'aspiration entre le boitier (18) et l'enveloppe de protection (16).System (10) according to any one of the preceding claims, wherein the fixed structure (12) comprises a housing (18) inside which the electronic equipment is arranged, the housing (18) being arranged inside of the protective envelope (16), and the fixed structure (12) comprises means (24) for guiding air received from the suction means between the housing (18) and the protective envelope (16). Système (10) selon la revendication 4, dans lequel le boitier (18) est fermé hermétiquement.System (10) according to claim 4, wherein the housing (18) is hermetically sealed. Système (10) selon l'une quelconque des revendications précédentes, dans lequel la structure fixe (12) comporte en outre au moins un orifice (22) de sortie de l'air aspiré par les moyens d'aspiration.System (10) according to any one of the preceding claims, wherein the fixed structure (12) further comprises at least one orifice (22) for extracting air sucked by the suction means. Système (10) selon l'une quelconque des revendications précédentes, dans lequel la structure mobile (10) comporte une aube (30) pour la ou chaque ouverture d'aspiration (26).System (10) according to any one of the preceding claims, wherein the movable structure (10) comprises a blade (30) for the or each suction opening (26). Système (10) selon les revendications 2 et 7 prises ensemble, dans lequel la ou chaque aube (30) est orientée vers l'avant vis-à-vis du sens de rotation (R) de la structure mobile (14) par rapport à la structure fixe (12).System (10) according to claims 2 and 7 taken together, wherein the or each blade (30) is oriented forwardly with respect to the direction of rotation (R) of the movable structure (14) relative to the fixed structure (12). Radar du type comportant un système électronique (10) selon l'une quelconque des revendications précédentes, ledit système électronique (10) comprenant une antenne tournante (31), la structure mobile (14) dudit système électronique (10) comportant l'antenne tournante (31).A radar of the type having an electronic system (10) as claimed in any one of the preceding claims, said electronic system (10) comprising a rotating antenna (31), the mobile structure (14) of said electronic system (10) including the rotating antenna (31).
EP12172199A 2011-06-17 2012-06-15 Electronic system including a stationary structure comprising a housing for protecting electronic equipment and a mobile structure relative to the stationary structure, the mobile structure comprising an opening for sucking in air Withdrawn EP2557909A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1101874A FR2976764B1 (en) 2011-06-17 2011-06-17 ELECTRONIC SYSTEM COMPRISING A FIXED STRUCTURE COMPRISING A PROTECTION ENVELOPE FOR ELECTRONIC EQUIPMENT AND A MOBILE STRUCTURE WITH RESPECT TO THE FIXED STRUCTURE, THE MOBILE STRUCTURE COMPRISING AN AIR SUCTION OPENING.

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EP (1) EP2557909A1 (en)
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FR2976764A1 (en) 2012-12-21
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JP2013004983A (en) 2013-01-07
US20120320525A1 (en) 2012-12-20

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