EP2963360A1 - Joule-thomson cooler and photodetector apparatus comprising such a device - Google Patents

Joule-thomson cooler and photodetector apparatus comprising such a device Download PDF

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Publication number
EP2963360A1
EP2963360A1 EP15172364.0A EP15172364A EP2963360A1 EP 2963360 A1 EP2963360 A1 EP 2963360A1 EP 15172364 A EP15172364 A EP 15172364A EP 2963360 A1 EP2963360 A1 EP 2963360A1
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EP
European Patent Office
Prior art keywords
tube
wire
gas
wound
turns
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.)
Granted
Application number
EP15172364.0A
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German (de)
French (fr)
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EP2963360B1 (en
Inventor
Dominique Chazot
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Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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Publication of EP2963360A1 publication Critical patent/EP2963360A1/en
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Publication of EP2963360B1 publication Critical patent/EP2963360B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/66—Devices for determining or controlling patterns ; Programme-control arrangements
    • D04B15/68—Devices for determining or controlling patterns ; Programme-control arrangements characterised by the knitting instruments used
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/02—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point using Joule-Thompson effect; using vortex effect
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/004—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being air

Definitions

  • the present invention relates to a Joule-Thomson chiller device and a photo-detection apparatus comprising such a device.
  • the invention more particularly relates to a Joule-Thomson chiller device comprising a housing (housing a location to be cooled, a helically wound tube around a central cylindrical axis, the tube being intended to carry pressurized gas between a first end connected to a source of gas under pressure and a second end connected to an expansion orifice in the vicinity of the location to be cooled, the tube being disposed in a cooling chamber having an upstream end connected to the expansion orifice and an end downstream connected to a gas outlet, the cooling chamber defining a path for the expanded gas during which the expanded gas is heat exchanged with the tube to give him cold.
  • the invention particularly relates to Joule-Thomson coolers of the type comprising a low-pressure expanded gas circuit and a high-pressure gas circuit arranged in the low-pressure gas circuit and having an expansion orifice.
  • Joule-Thomson coolers of this type are described in particular in the documents EP338920A1 or FR2782785A1 .
  • the invention particularly relates to chillers for obtaining very quickly low temperatures of between 80 and 200K approximately and used for example for cooling infrared detectors.
  • one solution is to provide the tube finned exchangers.
  • An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.
  • the device according to the invention which moreover conforms to the generic definition given in the preamble above, is essentially characterized in that the tube is also wound on itself along its length in a helicoidal manner. forming turns, that is to say that the tube is helically wound on itself by forming turns which are helically wound in series about the cylindrical axis, and that a wire is housed inside the coils of the coiled tube, said wire extending along the tube helically around the central axis to create turbulence in the expanded gas flow in heat exchange with the tube.
  • the invention also relates to a photo-detection apparatus comprising a detector element mounted on a support cooled by a Joule-Thomson cooling device in which the Joule-Thomson cooling device complies with any of the above characteristics or above. after.
  • the invention may also relate to any alternative device or method comprising any combination of the above or below features.
  • the figure 4 illustrates an example Joule-Thomson chiller device 1 comprising a housing 2 housing a location 5 to be cooled.
  • the device conventionally comprises a tube 3 wound helically around a cylindrical central axis 8 forming a support.
  • the wound tube 3 for example made of stainless steel, is intended to convey gas under pressure between a first end 113 connected to a source of gas under pressure and a second end connected to an expansion orifice 4 in the vicinity of the location 5 to cool.
  • the gas under pressure may comprise one of: air, nitrogen, argon at a pressure of between 150 and 700 bar, in particular argon at 480 bar.
  • the expansion orifice 4 may in particular have a structure in accordance with that described in the document FR2833073A1 .
  • the tube 3 is disposed in a cooling chamber 6 having an upstream end connected to the expansion orifice 4 and a downstream end connected to an outlet 7 of gas.
  • the cooling chamber 6 forms a path for the expanded gas during which the expanded gas is countercurrently heat exchanged with the tube 3 to give it cold.
  • the tube 3 is also wound on itself along its length in a helical manner by forming turns 13. That is to say that the tube 3 is wound on itself in a helical manner forming turns 13 which are wound in series helically around the cylindrical axis 8. This forms a double winding.
  • the high pressure tube 3 can be wound with turns 13 contiguous or not on a mandrel support of small diameter (then removed at the end of winding). This assembly can then be wound on the cylindrical support shaft 8 which will constitute the exchanger of the cooler 1 (cf. Figures 2 and 3 ).
  • a wire 9 is housed inside the turns 13 of the wound tube 3.
  • the wire 9 extends along the tube 3 helically around the central axis 8 to create turbulence in the expanded gas flow in heat exchange with the tube 3.
  • This arrangement achieves the required heat exchange performance required without the need to provide fins or equivalent system at the tube 3.
  • This solution makes it possible to have a sufficiently large length of tube in a small space and therefore a maximum of exchange surface area between the cold gas and the hot gas at high pressure.
  • the cooling chamber 6 is delimited preferably by two concentric cylindrical walls respectively belonging to the housing 2 and the central axis 8.
  • This turbulence can be advantageously increased by inserting at least one winding channeling the flow of low pressure cold gas into the winding of the tube 3.
  • the device may comprise a first cord wound helically around the central axis 8.
  • the first cord is placed in the space between the central axis 8 and the adjacent sets of turns 13 of the tube 3.
  • This first bead 10, bearing against the cylindrical axis 8 and adjacent turns 13, forms barriers or baffles for the expanded gas in its path in the cooling chamber 6 and thus promote its turbulent flow through the inside turns 13.
  • the device may comprise a second cord wound helically around the wound tube 3.
  • the second cord is placed in the space between the casing 2 and the adjacent sets of turns 13 of the tube 3.
  • This second cord 11 bearing on the wall of the casing 2 and the adjacent turns, forms barriers or baffles for the gas in its path in the expansion chamber 6 and thus promote its turbulent flow through the interior of the turns 13.
  • the first 10 and second 11 cords thus form internal and external baffles in a direction transverse to the winding of the tube 3 on the axis 8.
  • the first 10 and the second cord 11 may comprise at least one of: a braided rope, a plastic wire, nylon, polyester.
  • the wire 9 and the cords 10, 11 may each be made of polyester having a diameter of 0.6 mm.
  • these elements (wire 9, cords 10, 11 have a diameter of between 0.2 and 1 mm (or more depending on the diameter of turns 13).
  • the diameters of the wires or cords 9, 10, 11 may depend on the outer interface diameter of the Joule Thomson cooler.
  • the diameter of the wire 9 may be variable along its length to reduce or increase the low pressure loss. Of course, this diameter of the wire 9 can not exceed the diameter of the mandrel support which was used to wind the tube 3 in turns 13 (otherwise it would generate difficulties to insert the wire into the turns).
  • the first bead 10 (or wire) preferably has a diameter sufficient to fill the space created between the central axis 8 and the turns 13 (this space will be a function of the diameter of the turns 13).
  • the second bead 11 (or wire) preferably has a diameter sufficient to seal between the turns 13 and the outer wall of the housing 2 (here also the diameter of the wire 11 may be a function of the diameter of the turns 13).
  • These elements 9, 10, 11 are preferably made of a weakly thermal conductor material (plastics, fabrics, ...) to avoid thermal bridges.
  • This system can also be applied to flat heat exchangers or other forms.
  • the device can be used for cooling infrared detectors.
  • the location 5 to be cooled comprises a sensor and belongs to a photo-detection device for example.
  • the device makes it possible to overcome the finned exchanger or other structures while achieving the required performance.
  • the outer surface of the tube 3 may be smooth.
  • the device reduces manufacturing costs (reduction of assembly time, does not require complex tools).
  • the device exploits the characteristics of materials and shapes to achieve the best performance.
  • the structure of the device reduces the fragility of the product (handling) compared to known systems.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Dispositif refroidisseur Joule-Thomson (1) comprenant un boîtier (2) abritant un emplacement (5) à refroidir, un tube (3) enroulé de façon hélicoïdale autour d'un axe (8) central cylindrique, le tube (3) étant destiné à transporter du gaz sous pression entre une première extrémité (113) reliée à une source de gaz sous pression et une seconde extrémité reliée à un orifice de détente (4) au voisinage de l'emplacement (5) à refroidir, le tube (3) étant disposé dans une chambre (6) de refroidissement ayant une extrémité amont reliée à l'orifice (4) de détente et une extrémité aval reliée à une sortie (7) de gaz, la chambre (6) de refroidissement délimitant un trajet pour le gaz détendu durant lequel le gaz détendu est mis en échange thermique avec le tube (3) pour lui céder des frigories, caractérisé en ce que tube (3) est enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires (13), c'est-à-dire que le tube (3) est enroulé sur lui-même de façon hélicoïdale en formant des spires (13) qui sont enroulées en série de façon hélicoïdale autour de l'axe (8) cylindrique, et en ce qu'un fil (9) est logé à l'intérieur des spires (13) du tube (3) enroulé, ledit fil (9) s'étendant le long du tube (3) de façon hélicoïdal autour de l'axe (8) central pour créer des turbulence dans le flux de gaz détendu en échange thermique avec le tube (3).Joule-Thomson cooling device (1) comprising a housing (2) housing a location (5) to be cooled, a tube (3) wound helically around a cylindrical central axis (8), the tube (3) being intended transporting gas under pressure between a first end (113) connected to a source of pressurized gas and a second end connected to an expansion orifice (4) in the vicinity of the location (5) to be cooled, the tube (3) ) being arranged in a cooling chamber (6) having an upstream end connected to the expansion orifice (4) and a downstream end connected to an outlet (7) of gas, the cooling chamber (6) delimiting a path for the expanded gas during which the expanded gas is heat-exchanged with the tube (3) to give it cold, characterized in that the tube (3) is also wound on itself along its length helically forming turns (13), i.e. the tube (3) is helically wound on itself by forming turns (13) which are wound in series helically around the cylindrical axis (8), and that a wire (9) is housed inside. coils (13) of the coiled tube (3), said wire (9) extending along the tube (3) helically around the central axis (8) to create turbulence in the expanded gas flow. heat exchange with the tube (3).

Description

La présente invention concerne un dispositif refroidisseur Joule-Thomson ainsi qu'un appareil de photo-détection comprenant un tel dispositif.The present invention relates to a Joule-Thomson chiller device and a photo-detection apparatus comprising such a device.

L'invention concerne plus particulièrement un dispositif refroidisseur Joule-Thomson comprenant un boîtier( abritant un emplacement à refroidir, un tube enroulé de façon hélicoïdale autour d'un axe central cylindrique, le tube étant destiné à transporter du gaz sous pression entre une première extrémité reliée à une source de gaz sous pression et une seconde extrémité reliée à un orifice de détente au voisinage de l'emplacement à refroidir, le tube étant disposé dans une chambre de refroidissement ayant une extrémité amont reliée à l'orifice de détente et une extrémité aval reliée à une sortie de gaz, la chambre de refroidissement délimitant un trajet pour le gaz détendu durant lequel le gaz détendu est mis en échange thermique avec le tube pour lui céder des frigories.The invention more particularly relates to a Joule-Thomson chiller device comprising a housing (housing a location to be cooled, a helically wound tube around a central cylindrical axis, the tube being intended to carry pressurized gas between a first end connected to a source of gas under pressure and a second end connected to an expansion orifice in the vicinity of the location to be cooled, the tube being disposed in a cooling chamber having an upstream end connected to the expansion orifice and an end downstream connected to a gas outlet, the cooling chamber defining a path for the expanded gas during which the expanded gas is heat exchanged with the tube to give him cold.

L'invention concerne notamment les refroidisseurs Joule-Thomson du type comprenant un circuit de gaz détendu basse pression et un circuit de gaz haute pression disposé dans le circuit de gaz basse pression et ayant un orifice de détente.The invention particularly relates to Joule-Thomson coolers of the type comprising a low-pressure expanded gas circuit and a high-pressure gas circuit arranged in the low-pressure gas circuit and having an expansion orifice.

Des refroidisseurs Joule-Thomson de ce type sont décrits notamment dans les documents EP338920A1 ou FR2782785A1 .Joule-Thomson coolers of this type are described in particular in the documents EP338920A1 or FR2782785A1 .

L'invention concerne notamment les refroidisseurs destinés à obtenir très rapidement des températures basses comprises entre 80 et 200K environ et utilises par exemple pour refroidir des détecteurs infrarouges.The invention particularly relates to chillers for obtaining very quickly low temperatures of between 80 and 200K approximately and used for example for cooling infrared detectors.

Pour améliorer l'échange thermique entre le gaz froid détendu et le tube véhiculant le gaz à haute pression à contre-courant, une solution consiste à pourvoir le tube d'échangeurs à ailettes.To improve the heat exchange between the expanded cold gas and the tube carrying the gas at high pressure against the current, one solution is to provide the tube finned exchangers.

Cette solution présente cependant plusieurs inconvénients. La fabrication d'une telle structure nécessite ainsi des opérations de brasage suivi d'un nettoyage chimique. De plus, une telle structure nécessite une grande rigueur dimensionnelle et est très fragile lors de sa manipulation ou manutention. Le coût de fabrication d'un tel dispositif est donc relativement important.This solution, however, has several disadvantages. The manufacture of such a structure thus requires brazing operations followed by chemical cleaning. In addition, such a structure requires great dimensional rigor and is very fragile during handling or handling. The manufacturing cost of such a device is therefore relatively important.

Pour atteindre les performances requises d'échange de chaleur d'autres solutions ont été envisagée comme par exemple des échangeurs de chaleur à billes ou à tubes. Ces solutions présentent cependant d'autres inconvénients de coût et de difficulté de fabrication.To achieve the required heat exchange performance other solutions have been envisaged such as heat exchangers for example. beads or tubes. These solutions, however, have other disadvantages of cost and difficulty of manufacture.

Un but de la présente invention est de pallier tout ou partie des inconvénients de l'art antérieur relevés ci-dessus.An object of the present invention is to overcome all or part of the disadvantages of the prior art noted above.

A cette fin, le dispositif selon l'invention, par ailleurs conforme à la définition générique qu'en donne le préambule ci-dessus, est essentiellement caractérisé en ce que le tube est enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires, c'est-à-dire que le tube est enroulé sur lui-même de façon hélicoïdale en formant des spires qui sont enroulées en série de façon hélicoïdale autour de l'axe cylindrique, et en ce qu'un fil est logé à l'intérieur des spires du tube enroulé, ledit fil s'étendant le long du tube de façon hélicoïdal autour de l'axe central pour créer des turbulence dans le flux de gaz détendu en échange thermique avec le tube.To this end, the device according to the invention, which moreover conforms to the generic definition given in the preamble above, is essentially characterized in that the tube is also wound on itself along its length in a helicoidal manner. forming turns, that is to say that the tube is helically wound on itself by forming turns which are helically wound in series about the cylindrical axis, and that a wire is housed inside the coils of the coiled tube, said wire extending along the tube helically around the central axis to create turbulence in the expanded gas flow in heat exchange with the tube.

Par ailleurs, des modes de réalisation de l'invention peuvent comporter l'une ou plusieurs des caractéristiques suivantes :

  • la chambre de refroidissement est délimitée par deux parois cylindriques concentriques,
  • la chambre de refroidissement est délimitée par le boîtier et l'axe central cylindrique,
  • le dispositif comporte un premier cordon enroulé de façon hélicoïdale autour de l'axe central ledit premier cordon étant placé dans l'espace situé entre l'axe central et les ensembles de spires adjacentes du tube, pour former des barrières ou chicanes pour le gaz détendu sur son trajet dans la chambre de refroidissement et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires,
  • le premier cordon est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polyester, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester,
  • le dispositif comporte un second cordon enroulé de façon hélicoïdale autour du tube enroulé, ledit second cordon étant placé dans l'espace situé entre le boîtier et les ensembles de spires adjacentes du tube, pour former des barrières ou chicanes pour le gaz sur son trajet dans la chambre de détente et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires,
  • le gaz détendu s'écoule dans la chambre de refroidissement selon une direction générale perpendiculaire au spires, c'est-à-dire, perpendiculairement à la section transversale du fil,
  • la chambre de refroidissement s'étend parallèlement à l'axe central cylindrique de sorte que le gaz progresse dans cette chambre selon une direction générale parallèle à l'axe central et rencontre plusieurs fois sur son trajet le fil pour obliger plusieurs fois le gaz à contourner le fil,
  • l'axe d'enroulement en série des spires (et du fil) est parallèle à l'axe central cylindrique,
  • les plans contenant l'axe d'enroulement en série des spires et du fil coupent le fil transversalement à plusieurs endroits dans la chambre de refroidissement,
  • l'axe longitudinal du fil est perpendiculaire à l'axe central cylindrique et/ou la direction générale d'écoulement du gaz détendu,
  • le second cordon est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester,
  • le dispositif comprend un ou plusieurs fils,
  • le fil est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester,
  • le dispositif comporte deux tubes enroulés de façon hélicoïdale autour de l'axe central cylindrique, chaque tube étant enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires, les deux tubes formant deux circuits de transport de gaz disposés en parallèle entre une première extrémité respective reliée à une source de gaz sous pression et une seconde extrémité respective reliée à un orifice de détente au voisinage de l'emplacement à refroidir, les deux tubes étant enroulés de façon alternés autour de l'axe cylindrique le long de ce dernier,
Furthermore, embodiments of the invention may include one or more of the following features:
  • the cooling chamber is delimited by two concentric cylindrical walls,
  • the cooling chamber is delimited by the housing and the central cylindrical axis,
  • the device comprises a first cord wound helically around the central axis, said first cord being placed in the space between the central axis and the adjacent sets of turns of the tube, to form barriers or baffles for the expanded gas on its way in the cooling chamber and thus promote its turbulent flow through the inside of the turns,
  • the first cord is composed of at least one of: a braided cord, a plastic wire, nylon, a polyester yarn, a polytetrafluoroethylene (PTFE) yarn, a cotton yarn, a polyester yarn,
  • the device comprises a second cord wound helically around the wound tube, said second bead being placed in the space between the housing and the adjacent sets of turns of the tube, to form gates or baffles for the gas on its path in the relaxation chamber and thus promote its turbulent flow through the inside of the turns,
  • the expanded gas flows into the cooling chamber in a general direction perpendicular to the turns, that is, perpendicular to the cross-section of the wire,
  • the cooling chamber extends parallel to the central cylindrical axis so that the gas progresses in this chamber in a general direction parallel to the central axis and meets several times in its path the wire to force several times the gas to bypass thread,
  • the winding axis in series of the turns (and the wire) is parallel to the central cylindrical axis,
  • the planes containing the winding axis in series of the turns and the wire cut the wire transversely at several places in the cooling chamber,
  • the longitudinal axis of the wire is perpendicular to the central cylindrical axis and / or the general flow direction of the expanded gas,
  • the second cord is composed of at least one of: a braided cord, a plastic wire, nylon, a polytetrafluoroethylene (PTFE) yarn, a cotton yarn, a polyester yarn,
  • the device comprises one or more wires,
  • the yarn is composed of at least one of: a braided rope, a plastic wire, nylon, a polytetrafluoroethylene (PTFE) yarn, a cotton yarn, a polyester yarn,
  • the device comprises two tubes wound helically around the central cylindrical axis, each tube being wound on itself along its length helically so as to form turns, the two tubes forming two gas transport circuits arranged in parallel between a respective first end connected to a source of pressurized gas and a respective second end connected to an expansion orifice in the vicinity of the location to be cooled, the two tubes being wound alternately about the cylindrical axis along this last,

L'invention concerne également un appareil de photo-détection comprenant un élément détecteur monté sur un support refroidi par un dispositif refroidisseur Joule-Thomson dans lequel le dispositif refroidisseur Joule-Thomson est conforme à l'une quelconque des caractéristiques ci-dessus ou ci-après.The invention also relates to a photo-detection apparatus comprising a detector element mounted on a support cooled by a Joule-Thomson cooling device in which the Joule-Thomson cooling device complies with any of the above characteristics or above. after.

L'invention peut concerner également tout dispositif ou procédé alternatif comprenant toute combinaison des caractéristiques ci-dessus ou ci-dessous.The invention may also relate to any alternative device or method comprising any combination of the above or below features.

D'autres particularités et avantages apparaîtront à la lecture de la description ci-après, faite en référence aux figures dans lesquelles :

  • la figure 1 représente une vue en perspective, schématique et partielle, illustrant une partie d'un dispositif de refroidissement selon un exemple de réalisation de l'invention,
  • la figure 2 représente une vue de côté, schématique et partielle, illustrant un détail du dispositif de refroidissement de la figure 1 illustrant l'enroulement du tube véhiculant le gaz,
  • la figure 3 représente une vue de face, schématique et partielle, illustrant un détail de l'agencement de la figure 2
  • la figure 4 représente une vue en coupe longitudinale, schématique et partielle, d'un exemple de réalisation du dispositif de refroidissement selon l'invention.
Other particularities and advantages will appear on reading the following description, made with reference to the figures in which:
  • the figure 1 is a perspective view, schematic and partial, illustrating a portion of a cooling device according to an exemplary embodiment of the invention,
  • the figure 2 represents a side view, schematic and partial, illustrating a detail of the cooling device of the figure 1 illustrating the winding of the tube conveying the gas,
  • the figure 3 represents a front view, schematic and partial, illustrating a detail of the arrangement of the figure 2
  • the figure 4 is a longitudinal sectional view, schematic and partial, of an embodiment of the cooling device according to the invention.

La figure 4 illustre un exemple de dispositif refroidisseur Joule-Thomson 1 comprenant un boîtier 2 abritant un emplacement 5 à refroidir. Le dispositif comporte classiquement un tube 3 enroulé de façon hélicoïdale autour d'un axe 8 central cylindrique formant support.The figure 4 illustrates an example Joule-Thomson chiller device 1 comprising a housing 2 housing a location 5 to be cooled. The device conventionally comprises a tube 3 wound helically around a cylindrical central axis 8 forming a support.

Le tube 3 enroulé, par exemple en acier inoxydable, est destiné à transporter du gaz sous pression entre une première extrémité 113 reliée à une source de gaz sous pression et une seconde extrémité reliée à un orifice de détente 4 au voisinage de l'emplacement 5 à refroidir. Par exemple le gaz sous pression peut comprendre l'un parmi : de l'air, de l'azote, de l'argon à une pression compris entre 150 et 700 bar, notamment de l'argon à 480bar.The wound tube 3, for example made of stainless steel, is intended to convey gas under pressure between a first end 113 connected to a source of gas under pressure and a second end connected to an expansion orifice 4 in the vicinity of the location 5 to cool. For example, the gas under pressure may comprise one of: air, nitrogen, argon at a pressure of between 150 and 700 bar, in particular argon at 480 bar.

L'orifice 4 de détente peut notamment avoir une structure conforme à celle décrite dans le document FR2833073A1 .The expansion orifice 4 may in particular have a structure in accordance with that described in the document FR2833073A1 .

Le tube 3 est disposé dans une chambre 6 de refroidissement ayant une extrémité amont reliée à l'orifice 4 de détente et une extrémité aval reliée à une sortie 7 de gaz.The tube 3 is disposed in a cooling chamber 6 having an upstream end connected to the expansion orifice 4 and a downstream end connected to an outlet 7 of gas.

La chambre 6 de refroidissement forme un trajet pour le gaz détendu durant lequel le gaz détendu est mis en échange thermique à contre-courant avec le tube 3 pour lui céder des frigories.The cooling chamber 6 forms a path for the expanded gas during which the expanded gas is countercurrently heat exchanged with the tube 3 to give it cold.

Selon une particularité avantageuse, le tube 3 est enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires 13. C'est-à-dire que le tube 3 est enroulé sur lui-même de façon hélicoïdale en formant des spires 13 qui sont enroulées en série de façon hélicoïdale autour de l'axe 8 cylindrique. Ceci forme un double enroulement.According to an advantageous feature, the tube 3 is also wound on itself along its length in a helical manner by forming turns 13. That is to say that the tube 3 is wound on itself in a helical manner forming turns 13 which are wound in series helically around the cylindrical axis 8. This forms a double winding.

Dans un premier temps, le tube 3 haute pression peut être bobiné avec des spires 13 jointives ou non sur un support mandrin de faible diamètre (ensuite retiré en fin de bobinage). Cet ensemble peut ensuite être bobiné sur l'axe 8 support cylindrique qui constituera l'échangeur du refroidisseur 1 (cf. figures 2 et 3).At first, the high pressure tube 3 can be wound with turns 13 contiguous or not on a mandrel support of small diameter (then removed at the end of winding). This assembly can then be wound on the cylindrical support shaft 8 which will constitute the exchanger of the cooler 1 (cf. Figures 2 and 3 ).

Il est possible de bobiner un seul tube 3 ou plusieurs tubes en parallèles. Plusieurs tubes hélicoïdaux peuvent ainsi être enroulés alternativement sur le support 8.It is possible to wind a single tube 3 or more tubes in parallel. Several helical tubes can thus be wound alternately on the support 8.

De plus, un fil 9 est logé à l'intérieur des spires 13 du tube 3 enroulé. Le fil 9 s'étend le long du tube 3 de façon hélicoïdal autour de l'axe 8 central pour créer des turbulences dans le flux de gaz détendu en échange thermique avec le tube 3.In addition, a wire 9 is housed inside the turns 13 of the wound tube 3. The wire 9 extends along the tube 3 helically around the central axis 8 to create turbulence in the expanded gas flow in heat exchange with the tube 3.

Cet agencement permet d'atteindre les performances requises d'échange de chaleur requise sans nécessité de prévoir des ailettes ou un système équivalent au niveau du tube 3.This arrangement achieves the required heat exchange performance required without the need to provide fins or equivalent system at the tube 3.

Cette solution permet d'avoir une longueur de tube suffisamment importante dans un faible encombrement et donc un maximum de surface d'échange entre le gaz froid et le gaz chaud à haute pression.This solution makes it possible to have a sufficiently large length of tube in a small space and therefore a maximum of exchange surface area between the cold gas and the hot gas at high pressure.

Comme illustré à la figure 4, la chambre 6 de refroidissement est délimitée de préférence par deux parois cylindriques concentriques appartenant respectivement par le boîtier 2 et l'axe 8 central.As illustrated in figure 4 , the cooling chamber 6 is delimited preferably by two concentric cylindrical walls respectively belonging to the housing 2 and the central axis 8.

Cette géométrie oblige le gaz à basse pression circulant à contre courant du gaz à haute pression à être dans un régime d'écoulement très turbulent autour du tube 3.This geometry forces the low-pressure gas circulating against the current of the high-pressure gas to be in a very turbulent flow regime around the tube 3.

Cette turbulence peut être avantageusement augmentée en insérant au moins un bobinage canalisant la circulation du gaz froid basse pression dans l'enroulement du tube 3.This turbulence can be advantageously increased by inserting at least one winding channeling the flow of low pressure cold gas into the winding of the tube 3.

A cet effet, le dispositif peut comporter un premier 10 cordon enroulé de façon hélicoïdale autour de l'axe 8 central. Le premier 10 cordon est placé dans l'espace situé entre l'axe 8 central et les ensembles de spires 13 adjacentes du tube 3. Ce premier cordon 10, en appui contre l'axe 8 cylindrique et les spires 13 adjacentes, forme des barrières ou chicanes pour le gaz détendu sur son trajet dans la chambre 6 de refroidissement et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires 13.For this purpose, the device may comprise a first cord wound helically around the central axis 8. The first cord is placed in the space between the central axis 8 and the adjacent sets of turns 13 of the tube 3. This first bead 10, bearing against the cylindrical axis 8 and adjacent turns 13, forms barriers or baffles for the expanded gas in its path in the cooling chamber 6 and thus promote its turbulent flow through the inside turns 13.

De même, le dispositif peut comporter un second 11 cordon enroulé de façon hélicoïdale autour du tube 3 enroulé. Le second 11 cordon est placé dans l'espace situé entre le boîtier 2 et les ensembles de spires 13 adjacentes du tube 3. Ce second cordon 11, en appui sur la paroi du boîtier 2 et les spires adjacentes, forme des barrières ou chicanes pour le gaz sur son trajet dans la chambre 6 de détente et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires 13.Similarly, the device may comprise a second cord wound helically around the wound tube 3. The second cord is placed in the space between the casing 2 and the adjacent sets of turns 13 of the tube 3. This second cord 11, bearing on the wall of the casing 2 and the adjacent turns, forms barriers or baffles for the gas in its path in the expansion chamber 6 and thus promote its turbulent flow through the interior of the turns 13.

Les premier 10 et second 11 cordons forment donc des chicanes intérieures et extérieures selon une direction transversale à l'enroulement du tube 3 sur l'axe 8.The first 10 and second 11 cords thus form internal and external baffles in a direction transverse to the winding of the tube 3 on the axis 8.

Tout comme le fil 9 intérieur aux spires 13, le premier 10 et le second 11 cordon peut comprendre au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, du polyester. Par exemple le fil 9 et les cordons 10, 11 peuvent être constitués chacun de polyester ayant un diamètre de 0,6mm.Like the inner wire 13 to the turns 13, the first 10 and the second cord 11 may comprise at least one of: a braided rope, a plastic wire, nylon, polyester. For example, the wire 9 and the cords 10, 11 may each be made of polyester having a diameter of 0.6 mm.

De préférence, ces éléments (fil 9, cordons 10, 11 ont un diamètre compris entre et 0,2 et 1 mm (ou plus selon le diamètre de spires 13).Preferably, these elements (wire 9, cords 10, 11 have a diameter of between 0.2 and 1 mm (or more depending on the diameter of turns 13).

Les diamètres des fils ou cordons 9, 10, 11 peuvent dépendre du diamètre extérieur d'interface du refroidisseur Joule Thomson.The diameters of the wires or cords 9, 10, 11 may depend on the outer interface diameter of the Joule Thomson cooler.

Le diamètre du fil 9 peut être variable sur sa longueur pour diminuer ou augmenter la perte de charge basse pression. Bien entendu, ce diamètre du fil 9 ne peut dépasser le diamètre du support de mandrin qui a servi à bobiner le tube 3 en spires 13 (sinon cela générerait des difficultés pour insérer le fil dans les spires).The diameter of the wire 9 may be variable along its length to reduce or increase the low pressure loss. Of course, this diameter of the wire 9 can not exceed the diameter of the mandrel support which was used to wind the tube 3 in turns 13 (otherwise it would generate difficulties to insert the wire into the turns).

Le premier cordon 10 (ou fil) a de préférence un diamètre suffisant pour combler l'espace créé entre l'axe 8 central et les spires 13 (cet espace sera fonction du diamètre des spires 13).The first bead 10 (or wire) preferably has a diameter sufficient to fill the space created between the central axis 8 and the turns 13 (this space will be a function of the diameter of the turns 13).

Le second cordon 11 (ou fil) a de préférence un diamètre suffisant pour assurer l'étanchéité entre les spires 13 et la paroi externe du boitier 2 (ici également le diamètre du fil 11 peut être fonction du diamètre des spires 13).The second bead 11 (or wire) preferably has a diameter sufficient to seal between the turns 13 and the outer wall of the housing 2 (here also the diameter of the wire 11 may be a function of the diameter of the turns 13).

Ces éléments 9, 10, 11 sont de préférence constitué d'un matériau faiblement conducteur thermique (plastique, tissus, ...) pour éviter des ponts thermiques.These elements 9, 10, 11 are preferably made of a weakly thermal conductor material (plastics, fabrics, ...) to avoid thermal bridges.

Cet agencement favorise au maximum l'échange thermique.This arrangement promotes maximum heat exchange.

Ce système peut également s'appliquer à des échangeurs de type radiateur plat ou autres formes.This system can also be applied to flat heat exchangers or other forms.

Le dispositif peut être utilisé pour le refroidissement de détecteurs infrarouges. Dans ce cas, l'emplacement 5 à refroidir comprend un capteur et appartient à un dispositif de photo-détection par exemple.The device can be used for cooling infrared detectors. In this case, the location 5 to be cooled comprises a sensor and belongs to a photo-detection device for example.

Le dispositif permet de s'affranchir des structures d'échangeur à ailette ou autre tout en atteignant les performances requises. La surface externe du tube 3 peut être lisse.The device makes it possible to overcome the finned exchanger or other structures while achieving the required performance. The outer surface of the tube 3 may be smooth.

Le dispositif permet de réduire les coûts de fabrication (réduction des temps de montage, ne nécessite pas d'outillages complexes). Le dispositif exploite les caractéristiques des matériaux et des formes pour atteindre les meilleures performances. De plus, la structure du dispositif réduit la fragilité du produit (manutention) par rapport aux systèmes connus.The device reduces manufacturing costs (reduction of assembly time, does not require complex tools). The device exploits the characteristics of materials and shapes to achieve the best performance. In addition, the structure of the device reduces the fragility of the product (handling) compared to known systems.

Claims (13)

Dispositif refroidisseur Joule-Thomson (1) comprenant un boîtier (2) abritant un emplacement (5) à refroidir, un tube (3) enroulé de façon hélicoïdale autour d'un axe (8) central cylindrique, le tube (3) étant destiné à transporter du gaz sous pression entre une première extrémité (113) reliée à une source de gaz sous pression et une seconde extrémité reliée à un orifice de détente (4) au voisinage de l'emplacement (5) à refroidir, le tube (3) étant disposé dans une chambre (6) de refroidissement ayant une extrémité amont reliée à l'orifice (4) de détente et une extrémité aval reliée à une sortie (7) de gaz, la chambre (6) de refroidissement délimitant un trajet pour le gaz détendu durant lequel le gaz détendu est mis en échange thermique avec le tube (3) pour lui céder des frigories, caractérisé en ce que le tube (3) est enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires (13), c'est-à-dire que le tube (3) est enroulé sur lui-même de façon hélicoïdale en formant des spires (13) qui sont enroulées en série de façon hélicoïdale autour de l'axe (8) cylindrique, et en ce qu'un fil (9) est logé à l'intérieur des spires (13) du tube (3) enroulé, ledit fil (9) s'étendant le long du tube (3) de façon hélicoïdal autour de l'axe (8) central pour créer des turbulence dans le flux de gaz détendu en échange thermique avec le tube (3).Joule-Thomson cooling device (1) comprising a housing (2) housing a location (5) to be cooled, a tube (3) wound helically around a cylindrical central axis (8), the tube (3) being intended transporting gas under pressure between a first end (113) connected to a source of pressurized gas and a second end connected to an expansion orifice (4) in the vicinity of the location (5) to be cooled, the tube (3) ) being arranged in a cooling chamber (6) having an upstream end connected to the expansion orifice (4) and a downstream end connected to an outlet (7) of gas, the cooling chamber (6) delimiting a path for the expanded gas during which the expanded gas is heat-exchanged with the tube (3) to give it cold, characterized in that the tube (3) is wound on itself along its length in a helical manner, forming turns (13), that is to say that the tube (3) is helically wound on itself by forming turns (13) which are wound in series helically around the cylindrical axis (8), and that a wire (9) is housed at the inside of the coils (13) of the coiled tube (3), said wire (9) extending along the tube (3) helically around the central axis (8) to create turbulence in the flow of gas expanded in heat exchange with the tube (3). Dispositif selon la revendication 1, caractérisé en ce que la chambre (6) de refroidissement est délimitée par deux parois cylindriques concentriques.Device according to claim 1, characterized in that the cooling chamber (6) is delimited by two concentric cylindrical walls. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la chambre (6) de refroidissement est délimitée par le boîtier (2) et l'axe (8) central cylindrique.Device according to claim 1 or 2, characterized in that the cooling chamber (6) is delimited by the housing (2) and the cylindrical central axis (8). Dispositif selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'il comporte un premier (10) cordon enroulé de façon hélicoïdale autour de l'axe (8) central ledit premier (10) cordon étant placé dans l'espace situé entre l'axe (8) central et les ensembles de spires (13) adjacentes du tube 3, pour former des barrières ou chicanes pour le gaz détendu sur son trajet dans la chambre (6) de refroidissement et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires (13).Device according to any one of claims 1 to 3, characterized in that it comprises a first (10) cord wound helically around the central axis (8) said first (10) cord being placed in space located between the central axis (8) and the adjacent sets of turns (13) of the tube 3, to form barriers or baffles for the gas relaxed on its way into the cooling chamber (6) and thus promote its turbulent flow through the interior of the turns (13). Dispositif selon la revendication 4, caractérisé en ce que le premier (10) cordon est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polyester, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester.Device according to claim 4, characterized in that the first cord (10) is composed of at least one of: a braided rope, a plastic wire, nylon, a polyester thread, a polytetrafluoroethylene wire ( PTFE), cotton yarn, polyester yarn. Dispositif selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comporte un second (11) cordon enroulé de façon hélicoïdale autour du tube (3) enroulé, ledit second (11) cordon étant placé dans l'espace situé entre le boîtier (2) et les ensembles de spires (13) adjacentes du tube (3), pour former des barrières ou chicanes pour le gaz sur son trajet dans la chambre (6) de détente et ainsi favoriser son écoulement turbulent en passant par l'intérieur des spires (13).Device according to any one of claims 1 to 4, characterized in that it comprises a second (11) cord wound helically around the tube (3) wound, said second (11) cord being placed in the space located between the housing (2) and the adjacent sets of turns (13) of the tube (3), to form barriers or baffles for the gas in its path in the expansion chamber (6) and thus to promote its turbulent flow through the inside of the turns (13). Dispositif selon la revendication 6, caractérisé en ce que le second (11) cordon est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester.Device according to Claim 6, characterized in that the second (11) cord is composed of at least one of: a braided rope, a wire made of plastic material, nylon, a polytetrafluoroethylene (PTFE) wire, a wire cotton, a polyester yarn. Dispositif selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le fil (9) est composé d'au moins l'un parmi : une corde tressé, un fil en matériau plastique, du nylon, un fil en polytétrafluoroéthylène (PTFE), un fil de coton, un fil polyester.Device according to any one of claims 1 to 7, characterized in that the wire (9) is composed of at least one of: a braided rope, a wire made of plastic material, nylon, a polytetrafluoroethylene wire ( PTFE), cotton yarn, polyester yarn. Dispositif selon l'une quelconque des revendications 1 à 8, caractérisé en ce qu'il comporte deux tubes (3) enroulés de façon hélicoïdale autour de l'axe (8) central cylindrique, chaque tube (3) étant enroulé également sur lui-même sur sa longueur de façon hélicoïdale en formant des spires (13), les deux tubes (3) formant deux circuits de transport de gaz disposés en parallèle entre une première extrémité (113) respective reliée à une source de gaz sous pression et une seconde extrémité respective reliée à un orifice de détente (4) au voisinage de l'emplacement (5) à refroidir, les deux tubes (3) étant enroulés de façon alternés autour de l'axe (8) cylindrique le long de ce dernier.Device according to any one of Claims 1 to 8, characterized in that it comprises two tubes (3) helically wound around the cylindrical central axis (8), each tube (3) being wound on itself as well. same lengthwise helically forming turns (13), the two tubes (3) forming two gas transport circuits arranged in parallel between a respective first end (113) connected to a source of gas under pressure and a second respective end connected to an expansion orifice (4) in the vicinity of the location (5) to be cooled, the two tubes (3) being wound alternately around the axis (8) cylindrical along the latter. Dispositif selon l'une quelconque des revendications 1 à 9 caractérisé en ce que le gaz détendu s'écoule dans la chambre de refroidissement selon une direction générale perpendiculaire au spires, c'est-à-dire, perpendiculairement à la section transversale du fil.Device according to any one of Claims 1 to 9, characterized in that the expanded gas flows into the chamber of cooling in a general direction perpendicular to the turns, that is to say, perpendicular to the cross section of the wire. Dispositif selon l'une quelconque des revendications 1 à 10 caractérisé en ce que la chambre de refroidissement s'étend parallèlement à l'axe central cylindrique de sorte que le gaz progresse dans cette chambre selon une direction générale parallèle à l'axe central et rencontre plusieurs fois sur son trajet le fil pour obliger plusieurs fois le gaz à contourner le fil.Device according to any one of claims 1 to 10 characterized in that the cooling chamber extends parallel to the cylindrical central axis so that the gas progresses in this chamber in a general direction parallel to the central axis and meets several times on its way the wire to force several times the gas to circumvent the wire. Dispositif selon l'une quelconque des revendications 1 à 11 caractérisé en ce que l'axe d'enroulement en série des spires (et du fil) est parallèle à l'axe central cylindrique.Device according to any one of claims 1 to 11 characterized in that the winding axis in series turns (and wire) is parallel to the central cylindrical axis. Appareil de photo-détection comprenant un élément détecteur (5) monté sur un support refroidi par un dispositif (1) refroidisseur Joule-Thomson, caractérisé en ce que le dispositif (1) refroidisseur Joule-Thomson est conforme à l'une quelconque des revendications 1 à 12.Photo-detection apparatus comprising a detector element (5) mounted on a support cooled by a Joule-Thomson cooling device (1), characterized in that the Joule-Thomson cooling device (1) is in accordance with any one of the claims 1 to 12.
EP15172364.0A 2014-06-30 2015-06-16 Joule-thomson cooler and photodetector apparatus comprising such a device Active EP2963360B1 (en)

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FR1456164A FR3022991B1 (en) 2014-06-30 2014-06-30 JOULE-THOMSON COOLING DEVICE AND PHOTO-DETECTION APPARATUS COMPRISING SUCH A DEVICE

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3061769A1 (en) * 2017-01-10 2018-07-13 Safran Electronics & Defense JET THOMSON COOLED REFRIGERATED INFRARED DETECTION MODULE

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1232263A (en) * 1958-12-01 1960-10-06 Hughes Aircraft Co Gas liquefier
GB867760A (en) * 1959-02-17 1961-05-10 Standard Telephones Cables Ltd Joule-thompson effect gas cooling device
US2991633A (en) * 1958-03-17 1961-07-11 Itt Joule-thomson effect cooling system
EP0338920A2 (en) 1988-04-20 1989-10-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Joule-Thomson cooler with porous mass heat exchanger
FR2782785A1 (en) 1998-08-27 2000-03-03 Air Liquide JOULE-THOMSON COOLER
FR2833073A1 (en) 2001-12-05 2003-06-06 Air Liquide CRYOGENIC FLUID FLOW CONTROL SYSTEM AND JOULE-THOMSON COOLER COMPRISING SUCH A CONTROL SYSTEM

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2991633A (en) * 1958-03-17 1961-07-11 Itt Joule-thomson effect cooling system
FR1232263A (en) * 1958-12-01 1960-10-06 Hughes Aircraft Co Gas liquefier
GB867760A (en) * 1959-02-17 1961-05-10 Standard Telephones Cables Ltd Joule-thompson effect gas cooling device
EP0338920A2 (en) 1988-04-20 1989-10-25 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Joule-Thomson cooler with porous mass heat exchanger
FR2782785A1 (en) 1998-08-27 2000-03-03 Air Liquide JOULE-THOMSON COOLER
FR2833073A1 (en) 2001-12-05 2003-06-06 Air Liquide CRYOGENIC FLUID FLOW CONTROL SYSTEM AND JOULE-THOMSON COOLER COMPRISING SUCH A CONTROL SYSTEM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3061769A1 (en) * 2017-01-10 2018-07-13 Safran Electronics & Defense JET THOMSON COOLED REFRIGERATED INFRARED DETECTION MODULE

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FR3022991A1 (en) 2016-01-01
EP2963360B1 (en) 2017-12-27
FR3022991B1 (en) 2016-07-01
IL239592B (en) 2020-08-31

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