EP3465030A1 - Cryogenic device with compact exchanger - Google Patents

Cryogenic device with compact exchanger

Info

Publication number
EP3465030A1
EP3465030A1 EP17735183.0A EP17735183A EP3465030A1 EP 3465030 A1 EP3465030 A1 EP 3465030A1 EP 17735183 A EP17735183 A EP 17735183A EP 3465030 A1 EP3465030 A1 EP 3465030A1
Authority
EP
European Patent Office
Prior art keywords
pellets
capillary
cold
generating device
mandrel
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
EP17735183.0A
Other languages
German (de)
French (fr)
Other versions
EP3465030B1 (en
Inventor
Jean-Christophe TERME
Ahmad Sultan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lynred SAS
Original Assignee
Societe Francaise de Detecteurs Infrarouges SOFRADIR SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Societe Francaise de Detecteurs Infrarouges SOFRADIR SAS filed Critical Societe Francaise de Detecteurs Infrarouges SOFRADIR SAS
Priority to SI201730180T priority Critical patent/SI3465030T1/en
Publication of EP3465030A1 publication Critical patent/EP3465030A1/en
Application granted granted Critical
Publication of EP3465030B1 publication Critical patent/EP3465030B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/37—Capillary tubes
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/04—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being spirally coiled
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/003—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by using permeable mass, perforated or porous materials
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/02—Gas cycle refrigeration machines using the Joule-Thompson effect
    • F25B2309/022—Gas cycle refrigeration machines using the Joule-Thompson effect characterised by the expansion element
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • F25B2341/062—Capillary expansion valves
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/05—Compression system with heat exchange between particular parts of the system
    • F25B2400/052—Compression system with heat exchange between particular parts of the system between the capillary tube and another part of the refrigeration cycle
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange

Definitions

  • the invention lies in the general field of cold machines, and more particularly in cold generating devices intended to allow the operation of certain types of detectors, and more particularly infra-red detectors of the type cooled, also called quantum infra-red detectors. It is more particularly devices of the type in question implementing as a source of cold, the principle of relaxation called "Joule-Thomson".
  • the devices of the prior art implement a Hampson-type countercurrent exchanger, in which the high-pressure fluid circulates in a capillary surrounding a cylindrical sleeve or mandrel, closed off by an insulating foam.
  • the heat exchange occurs at the periphery of the sleeve, at which the low-pressure fluid flows counter-currently.
  • the invention is aimed at a device of the type in question which makes it possible at the same time to increase the efficiency of such a device, in particular by reducing the TMF, that is to say the cooling time of the installation. without altering the size of the existing devices or conversely, at constant TMF, to reduce the size of such devices.
  • the invention proposes a cold generating device implementing the "Joule-Thomson" expansion principle, comprising an exchanger in which a fluid under high pressure and under low pressure flows in countercurrent.
  • the heat exchanger consists of the stack of pellets made of porous material, and in particular sintered, constituting a cylindrical mandrel, in contact with which is wound a capillary in which the high pressure fluid circulates, the low fluid pressure circulating against the current inside the porous mandrel thus formed.
  • a porous thermal insulating fabric typically made of glass fibers.
  • the invention basically consists in replacing the mandrel and fins of the prior art with a stack of sintered and porous material, favoring the heat exchange of the low-pressure fluid with the high-pressure fluid circulating in the capillary. peripheral in contact with said material.
  • This optimization of the exchange results from the nature of the material constituting the mandrel, and also makes it possible to dispense with the fins optimizing the heat exchange of the prior art, and consequently, makes it possible to optimize the concentration of turns of the capillary in which circulates the high pressure fluid, and consequently allows to optimize the compactness of the cold generating device.
  • thermally insulating grids typically made of glass fiber
  • axial conduction is reduced and corollary optimizes the operation of the cold generator device .
  • the pellets are made from sintered silver or sintered copper.
  • the capillary is meanwhile made of metal typically copper, stainless steel or even cupronickel alloy.
  • the turns of the capillary are not in contact with each other.
  • a thermally insulating wire typically made of glass fiber and acting as a spacer, is coiled with the said capillary.
  • Such a wire provides different functions:
  • Figure 1 is a diagram illustrating the principle of relaxation "Joule-Thomson" implemented at the level of the cold generator device.
  • Figure 2 is a schematic representation of the device of the invention.
  • Figure 3 is a view similar to Figure 2 illustrating the respective circuit of the high pressure fluid and low pressure;
  • FIG. 4 is a schematic representation of a cryostat
  • FIG. 5 is a schematic representation in partial sagittal section of one of the portions of the cryostat of FIG. 4.
  • FIG. 1 therefore shows the operating diagram of a device implementing the "Joule-Thomson" trigger.
  • This diagram shows the source of high pressure fluid HP, this fluid can be a typically argon gas, nitrogen or air, and the return of said fluid after expansion.
  • the double coil (1) shows the countercurrent heat exchanger between the high pressure fluid emanating from the high pressure source HP and the low pressure fluid after expansion at the evaporator (2).
  • an expansion valve (3) being mounted before the evaporator.
  • the assembly is integrated within a vacuum chamber (4).
  • FIG. 2 shows the heart of the exchanger according to the invention.
  • This is constituted by the stack of pellets (5), made of porous material, and in particular sintered silver base.
  • Silver is indeed a very good thermal conductor and is also easy to sinter.
  • copper instead of silver.
  • the porosity of these pellets is close to 100 nanometers.
  • the orifices generated by the sintering of the pellets have a typical diameter of 100 nanometers.
  • pellets (5) are for example assembled to each other by means of fixing rods (6) emanating from the high-pressure connector (7) and provided with nuts (8) at their lower base. .
  • the pellets can be glued together.
  • these pellets (5) are separated from each other by a spacer or grid (9), made of a non-conductive porous material, typically consisting of a fiberglass woven fabric.
  • spacers have a typical thickness of 0.3 millimeters. The implementation of such spacers tends to oppose any axial thermal conduction, optimizing the heat exchange surface between the two streams, respectively low pressure and high pressure.
  • the assembly thus constituted by the pellets and the spacers constitutes a cylindrical mandrel, in contact with which is wound a capillary (10), in which flows the high pressure fluid.
  • This capillary is for example made of copper, stainless steel or a cupro-nickel alloy. It typically has an outer diameter of 0.5 millimeters and an inner diameter of 0.3 millimeters.
  • the low pressure fluid passes through them and cools them.
  • the pellets cool the high pressure fluid that circulates in the capillary. In fact, a good thermal contact is necessary between the capillary and the pellets.
  • the pellets (5) are produced using a mold shaped according to the desired shape of said pellets.
  • the silver powder is poured into the mold, and the temperature of the mold is raised to a temperature below the melting temperature of the silver, in order to obtain a simple sintering without causing the melting of the powder.
  • the thermal insulating elements (9) After completion of the pellets, their stacking is carried out by intercalating the thermal insulating elements (9), the latter having an external diameter less than or equal to that of the pellets (5), so that they can not come into contact with the capillary (10).
  • pellets and the spacers are threaded onto the holding rods (6), for example threaded, and locked by means of the nuts (8).
  • a mandrel is therefore de facto constituted.
  • the capillary for example made of cupro-nickel alloy undergoes treatment consisting of a silver deposit, for example by electrolysis, if the pellets are made of silver sintered. This deposit is intended to promote subsequent contact with the pellets (5), especially when proceeding to the fixing of said capillary by welding or solder.
  • the assembly is placed in an oven to generate the soldering phenomenon.
  • thermal conductive binder for example consisting of a type of "solgel” type of glue film loaded with metal powder, whitewashed in the capillary / pellet area.
  • the device of the invention is intended to be integrated in a cylindrical well of a cryostat, as shown in FIG. 4.
  • a cryostat As shown in FIG. 4.
  • Such a cryostat (11) is traditionally maintained under empty. It receives within the enclosure that defines an infrared detector (12), positioned vertically above a window (13) transparent to the radiation to be detected.
  • an infrared detector (12) positioned vertically above a window (13) transparent to the radiation to be detected.
  • it comprises two wells (14), within which are inserted in each of them a device according to the invention, in order to generate the cold necessary for the operation of said detector.
  • FIG. 5 shows a schematic view in partial sagittal section of one of the wells (14) provided with the device of the invention.
  • the wire (15) is thus wound along the mandrel and then fixed at its two ends, typically by gluing.
  • this wire avoids any thermal bridge between the turns on the one hand, and between the turns and the well (14).
  • the consecutive turns of the capillary (10) are therefore thermally isolated from each other.
  • the turns of the capillary (10) are thermally isolated from the well (14).
  • the presence of the wire (15) provides a seal of the device relative to said well, forcing the low pressure fluid to pass through the pellets (5), and therefore contributing to optimize the efficiency of the device of the invention.
  • the operating temperature of the latter is typically between 77K and 250K.
  • the pressure of the high pressure fluid is typically between a few tens to a few hundred bars.
  • the device according to the invention makes it possible to considerably increase the heat exchange area in comparison with the devices of the prior art, of the type comprising a finned capillary, typically 1000 times with constant bulk. It is therefore readily apparent that the efficiency of such a cold machine is itself increased, or that the size of such a cold machine can be significantly reduced, while maintaining the same performance as the devices of the invention. prior art. These results are particularly significant in the context of cooled infrared detectors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

The invention relates to a cold-generating device that uses the "Joule-Thomson" expansion principle. It comprises a heat exchanger inside which a high-pressure and a low-pressure fluid circulate in countercurrent. The heat exchanger consists of a stack of pellets (5) made of a porous material, particularly sintered material, forming a cylindrical mandrel at the periphery of which, and in contact with which, a capillary (10) is wound inside which the high-pressure fluid circulates, wherein the low-pressure fluid circulates in countercurrent inside the porous mandrel formed in this way.

Description

DISPOSITIF CRYOGENIQUE A ECHANGEUR COMPACT  CRYOGENIC DEVICE WITH COMPACT EXCHANGER
DOMAINE DE L'INVENTION L'invention se situe dans le domaine général des machines à froid, et plus particulièrement dans les dispositifs de génération de froid destinés à permettre le fonctionnement de certains types de détecteurs, et plus particulièrement des détecteurs infra-rouges du type refroidi, également dénommés détecteurs infra-rouges quantiques. Elle vise plus particulièrement des dispositifs du type en question mettant en œuvre comme source de froid, le principe de la détente dite « Joule-Thomson ».  FIELD OF THE INVENTION The invention lies in the general field of cold machines, and more particularly in cold generating devices intended to allow the operation of certain types of detectors, and more particularly infra-red detectors of the type cooled, also called quantum infra-red detectors. It is more particularly devices of the type in question implementing as a source of cold, the principle of relaxation called "Joule-Thomson".
ETAT ANTERIEUR DE LA TECHNIQUE Dans le cadre particulier des détecteurs infra-rouges, on souhaite pour une raison évidente d'encombrement, limiter le volume de la source cryogénique. De fait, les machines cryogéniques miniatures utilisent fréquemment le principe de détente de « Joule-Thomson », permettant ainsi de disposer d'une puissance cryogénique importante, et par conséquent d'un refroidissement rapide, notamment de détecteurs infra-rouges ou de composés électroniques nécessitant pour leur fonctionnement de fonctionner à des températures particulièrement basses. PRIOR ART In the particular context of infra-red detectors, it is desired for obvious reasons of space, to limit the volume of the cryogenic source. In fact, miniature cryogenic machines frequently use the "Joule-Thomson" relaxation principle, thus making it possible to have a large cryogenic power, and therefore a rapid cooling, in particular of infrared detectors or electronic compounds. requiring for their operation to operate at particularly low temperatures.
Il est connu que la performance de telles machines cryogéniques dépend de l'efficacité de l'échange thermique qui intervient entre le fluide haute pression et le fluide basse pression avant que la détente du fluide n'intervienne. L'efficacité de l'échange thermique est donc primordiale. It is known that the performance of such cryogenic machines depends on the efficiency of the heat exchange that occurs between the high pressure fluid and the low pressure fluid before the expansion of the fluid intervenes. The efficiency of heat exchange is therefore essential.
A cet effet, les dispositifs de l'art antérieur mettent en œuvre un échangeur à contre- courant du type Hampson, dans lequel le fluide haute pression circule dans un capillaire entourant un manchon ou mandrin cylindrique, obturé par une mousse isolante. L'échange thermique intervient à la périphérie du manchon, au niveau duquel circule à contre-courant le fluide basse pression. For this purpose, the devices of the prior art implement a Hampson-type countercurrent exchanger, in which the high-pressure fluid circulates in a capillary surrounding a cylindrical sleeve or mandrel, closed off by an insulating foam. The heat exchange occurs at the periphery of the sleeve, at which the low-pressure fluid flows counter-currently.
Afin d'optimiser cet échange thermique, on a proposé d'augmenter la surface d'échanges entre le fluide haute pression et le fluide basse pression, en munissant le capillaire d'ailettes radiales. Si certes, la surface d'échange thermique s'en trouve augmentée, en revanche, la présence des ailettes, en raison de leur épaisseur, augmente l'écartement entre deux spires consécutives, et partant diminue le nombre de spires du capillaire pour une longueur donnée du mandrin, neutralisant à tout le moins partiellement l'optimisation recherchée de l'échange. Dans le même but, il a également été proposé d'accroître la longueur de l'échangeur, et plus particulièrement la longueur du capillaire. On se heurte alors à la problématique de l'encombrement dudit échangeur, et donc de la machine à froid. In order to optimize this heat exchange, it has been proposed to increase the exchange surface between the high-pressure fluid and the low-pressure fluid, by providing the capillary with radial fins. While the heat exchange surface is increased, the presence of the fins, because of their thickness, increases. the spacing between two consecutive turns, and therefore decreases the number of turns of the capillary for a given length of the mandrel, neutralizing at least partially the desired optimization of the exchange. For the same purpose, it has also been proposed to increase the length of the exchanger, and more particularly the length of the capillary. One then comes up against the problem of congestion of said exchanger, and therefore the cold machine.
On a également proposé de réduire la conduction axiale dans l'échangeur, inhérente à la mise en œuvre du mandrin, et source de perte et d'efficacité. It has also been proposed to reduce the axial conduction in the exchanger, inherent to the implementation of the chuck, and a source of loss and efficiency.
L'invention vise un dispositif du type en question permettant tout à la fois d'augmenter l'efficacité d'un tel dispositif, notamment en réduisant le TMF, c'est-à-dire le temps de mise en froid de l'installation, sans altérer l'encombrement des dispositifs existants ou au contraire, à TMF constant, à diminuer l'encombrement de tels dispositifs. The invention is aimed at a device of the type in question which makes it possible at the same time to increase the efficiency of such a device, in particular by reducing the TMF, that is to say the cooling time of the installation. without altering the size of the existing devices or conversely, at constant TMF, to reduce the size of such devices.
EXPOSE DE L'INVENTION SUMMARY OF THE INVENTION
A cet effet, l'invention propose un dispositif de génération de froid mettant en œuvre le principe de la détente de « Joule-Thomson », comprenant un échangeur au sein duquel circule à contre-courant un fluide sous haute pression et sous basse pression. For this purpose, the invention proposes a cold generating device implementing the "Joule-Thomson" expansion principle, comprising an exchanger in which a fluid under high pressure and under low pressure flows in countercurrent.
Selon l'invention, l'échangeur thermique est constitué de l'empilement de pastilles réalisées en matériau poreux, et notamment fritté, constituant un mandrin cylindrique, au contact duquel est enroulé un capillaire au sein duquel circule le fluide haute pression, le fluide basse pression circulant à contre-courant à l'intérieur du mandrin poreux ainsi constitué. According to the invention, the heat exchanger consists of the stack of pellets made of porous material, and in particular sintered, constituting a cylindrical mandrel, in contact with which is wound a capillary in which the high pressure fluid circulates, the low fluid pressure circulating against the current inside the porous mandrel thus formed.
En outre, on intercale entre chacune des pastilles réalisées en matériau fritté, un tissu poreux isolant thermique, typiquement réalisé en fibres de verre. In addition, there is interposed between each of the pellets made of sintered material, a porous thermal insulating fabric, typically made of glass fibers.
En d'autres termes, l'invention consiste fondamentalement à remplacer le mandrin et les ailettes de l'art antérieur par un empilement de matériau fritté et poreux, favorisant l'échange thermique du fluide basse pression avec le fluide haute pression circulant dans le capillaire périphérique en contact avec ledit matériau. Cette optimisation de l'échange résulte de la nature du matériau constitutif du mandrin, et permet en outre de s'affranchir des ailettes optimisant l'échange thermique de l'art antérieur, et par voie de conséquence, permet d'optimiser la concentration en spires du capillaire au sein duquel circule le fluide haute pression, et par voie de conséquence permet d'optimiser la compacité du dispositif générateur de froid. In other words, the invention basically consists in replacing the mandrel and fins of the prior art with a stack of sintered and porous material, favoring the heat exchange of the low-pressure fluid with the high-pressure fluid circulating in the capillary. peripheral in contact with said material. This optimization of the exchange results from the nature of the material constituting the mandrel, and also makes it possible to dispense with the fins optimizing the heat exchange of the prior art, and consequently, makes it possible to optimize the concentration of turns of the capillary in which circulates the high pressure fluid, and consequently allows to optimize the compactness of the cold generating device.
De plus, en raison de l'intercalation entre les pastilles de matériau fritté de grilles isolantes thermiquement, typiquement réalisées en fibres de verre, donc non conducteur de la chaleur, on réduit la conduction axiale et corolairement on optimise le fonctionnement du dispositif générateur de froid. In addition, because of the intercalation between the pellets of sintered material thermally insulating grids, typically made of glass fiber, so non-heat conductor, axial conduction is reduced and corollary optimizes the operation of the cold generator device .
Avantageusement, les pastilles sont réalisées à base de fritté d'argent ou de fritté de cuivre. Le capillaire est quant à lui réalisé en métal typiquement en cuivre, en acier inoxydable, voire en alliage cupronickel. Advantageously, the pellets are made from sintered silver or sintered copper. The capillary is meanwhile made of metal typically copper, stainless steel or even cupronickel alloy.
Selon une caractéristique avantageuse de l'invention, les spires du capillaire ne sont pas en contact l'une avec l'autre. A cet effet, on enroule concomitamment avec ledit capillaire, un fil isolant thermiquement, typiquement réalisé en fibre de verre et faisant fonction d'espaceur. Un tel fil assure différentes fonctions : According to an advantageous characteristic of the invention, the turns of the capillary are not in contact with each other. For this purpose, a thermally insulating wire, typically made of glass fiber and acting as a spacer, is coiled with the said capillary. Such a wire provides different functions:
■ isoler thermiquement deux spires consécutives du capillaire ; ■ thermally insulate two consecutive turns of the capillary;
■ isoler thermiquement lesdites spires du tube extérne ou puits dans lequel le dispositif de l'invention est susceptible d'être introduit ; ■ thermally insulate said turns of the outer tube or well in which the device of the invention is likely to be introduced;
■ assurer une étanchéité du dispositif de l'invention avec un tel tube externe ou puits, contraignant le fluide basse pression à passer au travers des pastilles en matériau fritté, induisant une optimisation du rendement. ■ seal the device of the invention with such an outer tube or well, forcing the low pressure fluid to pass through the pellets sintered material, inducing an optimization of the yield.
BREVE DESCRIPTION DES FIGURES BRIEF DESCRIPTION OF THE FIGURES
La manière de réaliser l'invention et les avantages qui en découlent, ressortiront mieux de la description qui suit, donnée à titre indicatif et non limitatif à l'appui des figures annexées. The manner of carrying out the invention and the advantages which result therefrom will emerge more clearly from the description which follows, given by way of indication and not by way of limitation, in support of the appended figures.
la figure 1 est un schéma illustrant le principe de la détente « Joule-Thomson » mise en œuvre au niveau du dispositif générateur de froid.  Figure 1 is a diagram illustrating the principle of relaxation "Joule-Thomson" implemented at the level of the cold generator device.
la figure 2 est une représentation schématique du dispositif de l'invention. la figure 3 est une vue analogue à la figure 2 illustrant le circuit respectif du fluide haute pression et basse pression ; Figure 2 is a schematic representation of the device of the invention. Figure 3 is a view similar to Figure 2 illustrating the respective circuit of the high pressure fluid and low pressure;
la figure 4 est une représentation schématique d'un cryostat ;  Figure 4 is a schematic representation of a cryostat;
la figure 5 est une représentation schématique en section sagittale partielle de l'une des partie du cryostat de la figure 4.  FIG. 5 is a schematic representation in partial sagittal section of one of the portions of the cryostat of FIG. 4.
DESCRIPTION DETAILLEE DE L'INVENTION DETAILED DESCRIPTION OF THE INVENTION
On a donc représenté en relation avec la figure 1 le schéma de fonctionnement d'un dispositif mettant en œuvre la détente de « Joule-Thomson ». Ce schéma fait apparaître la source de fluide haute pression HP, ce fluide pouvant être un gaz typiquement argon, azote ou air, et le retour dudit fluide après détente. FIG. 1 therefore shows the operating diagram of a device implementing the "Joule-Thomson" trigger. This diagram shows the source of high pressure fluid HP, this fluid can be a typically argon gas, nitrogen or air, and the return of said fluid after expansion.
On a représenté par le double serpentin (1), l'échangeur thermique à contre-courant entre le fluide haute pression émanant de la source haute pression HP, et le fluide basse pression, après détente au niveau de l'évaporateur (2), une valve de détente (3) étant montée avant l'évaporateur. L'ensemble est intégré au sein d'une enceinte à vide (4). The double coil (1) shows the countercurrent heat exchanger between the high pressure fluid emanating from the high pressure source HP and the low pressure fluid after expansion at the evaporator (2). an expansion valve (3) being mounted before the evaporator. The assembly is integrated within a vacuum chamber (4).
On a représenté au sein de la figure 2 le cœur de l'échangeur conforme à l'invention. Celui-ci est constitué par l'empilement de pastilles (5), réalisées en matériau poreux, et notamment en fritté à base d'argent. L'argent est en effet un très bon conducteur thermique et en outre s'avère facile à fritter. On pourrait également envisager d'utiliser du cuivre en remplacement de l'argent. Typiquement, la porosité de ces pastilles est voisine de 100 nanomètres. En d'autres termes, les orifices générés par le frittage des pastilles présentent un diamètre typique de 100 nanomètres. FIG. 2 shows the heart of the exchanger according to the invention. This is constituted by the stack of pellets (5), made of porous material, and in particular sintered silver base. Silver is indeed a very good thermal conductor and is also easy to sinter. One could also consider using copper instead of silver. Typically, the porosity of these pellets is close to 100 nanometers. In other words, the orifices generated by the sintering of the pellets have a typical diameter of 100 nanometers.
Ces pastilles (5), de forme globalement cylindrique, sont par exemple assemblées les unes aux autres au moyen de tiges de fixation (6), émanant du connecteur haute pression (7), et munies d'écrous (8) à leur base inférieure. Alternativement, les pastilles peuvent être collées entre elles. Selon l'invention, ces pastilles (5) sont séparées les unes des autres par un intercalaire ou grille (9), réalisé en un matériau poreux non conducteur, typiquement constitué d'un tissé en fibres de verre. Ces intercalaires présentent une épaisseur typique de 0,3 millimètre. La mise en œuvre de tels intercalaires tend à s'opposer à toute conduction thermique axiale, optimisant la surface d'échange thermique entre les deux flux, respectivement basse pression et haute pression. These pellets (5), of generally cylindrical shape, are for example assembled to each other by means of fixing rods (6) emanating from the high-pressure connector (7) and provided with nuts (8) at their lower base. . Alternatively, the pellets can be glued together. According to the invention, these pellets (5) are separated from each other by a spacer or grid (9), made of a non-conductive porous material, typically consisting of a fiberglass woven fabric. These spacers have a typical thickness of 0.3 millimeters. The implementation of such spacers tends to oppose any axial thermal conduction, optimizing the heat exchange surface between the two streams, respectively low pressure and high pressure.
L'ensemble ainsi constitué par les pastilles et les intercalaires constitue un mandrin cylindrique, an contact duquel est enroulé un capillaire (10), au sein duquel circule le fluide haute pression. Ce capillaire est par exemple réalisé en cuivre, en acier inoxydable ou en un alliage cupro-nickel. Il présente typiquement un diamètre externe de 0,5 millimètre et un diamètre interne de 0,3 millimètre. The assembly thus constituted by the pellets and the spacers constitutes a cylindrical mandrel, in contact with which is wound a capillary (10), in which flows the high pressure fluid. This capillary is for example made of copper, stainless steel or a cupro-nickel alloy. It typically has an outer diameter of 0.5 millimeters and an inner diameter of 0.3 millimeters.
En raison du caractère poreux des pastilles (5), le fluide basse pression les traverse et les refroidit. A leur tour, eu égard au fait de leur caractère bon conducteur thermique, les pastilles refroidissent le fluide haute pression qui circule dans le capillaire. De fait, un bon contact thermique est nécessaire entre le capillaire et les pastilles. Due to the porous nature of the pellets (5), the low pressure fluid passes through them and cools them. In turn, because of their good thermal conductivity, the pellets cool the high pressure fluid that circulates in the capillary. In fact, a good thermal contact is necessary between the capillary and the pellets.
La réalisation d'un tel dispositif peut être effectuée de la manière suivante. The realization of such a device can be performed in the following manner.
En premier lieu, on réalise les pastilles (5) à l'aide d'un moule conformé en fonction de la forme souhaitée desdites pastilles. La poudre d'argent est versée dans le moule, et on élève la température du moule à une température inférieure à la température de fusion de l'argent, afin d'obtenir un simple frittage sans engendrer la fusion de la poudre. In the first place, the pellets (5) are produced using a mold shaped according to the desired shape of said pellets. The silver powder is poured into the mold, and the temperature of the mold is raised to a temperature below the melting temperature of the silver, in order to obtain a simple sintering without causing the melting of the powder.
Après réalisation des pastilles, on procède à leur empilement en intercalant les éléments isolant thermiques (9), ces derniers présentant un diamètre externe inférieur ou égal à celui des pastilles (5), de telle sorte qu'ils ne puissent entrer en contact avec le capillaire (10). After completion of the pellets, their stacking is carried out by intercalating the thermal insulating elements (9), the latter having an external diameter less than or equal to that of the pellets (5), so that they can not come into contact with the capillary (10).
Ces pastilles et les intercalaires sont enfilés sur les tiges de maintien (6), par exemple filetées, et bloqués au moyen des écrous (8). Un mandrin est donc de facto constitué. Le capillaire, par exemple réalisé en alliage cupro-nickel subit un traitement constitué par un dépôt d'argent, par exemple par électrolyse, si les pastilles sont réalisées en fritté d'argent. Ce dépôt a pour vocation de favoriser le contact ultérieur avec les pastilles (5), notamment lorsque l'on procède à la fixation dudit capillaire par soudure ou par brasure. Ainsi, après enroulement du capillaire (10) autour du mandrin, l'ensemble est placé dans un four pour engendrer le phénomène de brasure. These pellets and the spacers are threaded onto the holding rods (6), for example threaded, and locked by means of the nuts (8). A mandrel is therefore de facto constituted. The capillary, for example made of cupro-nickel alloy undergoes treatment consisting of a silver deposit, for example by electrolysis, if the pellets are made of silver sintered. This deposit is intended to promote subsequent contact with the pellets (5), especially when proceeding to the fixing of said capillary by welding or solder. Thus, after winding the capillary (10) around the mandrel, the assembly is placed in an oven to generate the soldering phenomenon.
Alternativement, il peut être envisagé de consolider l'ensemble ainsi constitué par un liant conducteur thermique, par exemple constitué d'un film de colle type « solgel » chargée en poudre métallique, badigeonné dans la zone capillaire/pastille. Alternatively, it may be envisaged to consolidate the assembly thus constituted by a thermal conductive binder, for example consisting of a type of "solgel" type of glue film loaded with metal powder, whitewashed in the capillary / pellet area.
Selon une caractéristique avantageuse de l'invention, on cherche à éviter tout contact entre les spires consécutives du capillaire, afin d'éviter tout pont thermique entre elles. A cet effet, il convient de rappeler que le dispositif de l'invention a vocation à être intégré dans un puits cylindrique d'un cryostat, tel qu'illustré au sein de la figure 4. Un tel cryostat (11) est traditionnellement maintenu sous vide. Il reçoit au sein de l'enceinte qu'il définit un détecteur infra rouge (12), positionné à l'aplomb d'une fenêtre (13) transparente au rayonnement à détecter. Enfin, il comporte deux puits (14), au sein desquels sont insérés dans chacun d'eux un dispositif conforme à l'invention, afin de générer le froid nécessaire au fonctionnement dudit détecteur. According to an advantageous characteristic of the invention, it is sought to avoid any contact between the consecutive turns of the capillary, in order to avoid any thermal bridge between them. For this purpose, it should be recalled that the device of the invention is intended to be integrated in a cylindrical well of a cryostat, as shown in FIG. 4. Such a cryostat (11) is traditionally maintained under empty. It receives within the enclosure that defines an infrared detector (12), positioned vertically above a window (13) transparent to the radiation to be detected. Finally, it comprises two wells (14), within which are inserted in each of them a device according to the invention, in order to generate the cold necessary for the operation of said detector.
On a représenté au sein de la figure 5, une vue schématique en section sagittale partielle de l'un des puits (14) muni du dispositif de l'invention. FIG. 5 shows a schematic view in partial sagittal section of one of the wells (14) provided with the device of the invention.
Ainsi, afin de forcer le fluide basse pression, et notamment le gaz basse pression à traverser les pastilles poreuses (5), on positionne un fil (15) réalisé en matériau isolant, par exemple réalisé en fibres de verre ou en fibres de polyester tel que commercialisées sous la marque déposée terylène®, venant prendre appui entre deux spires consécutives du capillaire (10), c'est-à-dire dans l'intervalle séparant lesdites spires, et contre la paroi interne (16) du puits cylindrique (14). Le fil (15) est ainsi enroulé le long du mandrin, puis fixé à ses deux extrémités, typiquement par collage. Thus, in order to force the low-pressure fluid, and in particular the low-pressure gas, to pass through the porous pellets (5), a wire (15) made of insulating material, for example made of glass fibers or of polyester fibers such as sold under the trademark terylene®, coming to bear between two consecutive turns of the capillary (10), that is to say in the interval separating said turns, and against the inner wall (16) of the cylindrical well (14). ). The wire (15) is thus wound along the mandrel and then fixed at its two ends, typically by gluing.
Ainsi, avec la mise en place de ce fil (15), on s'affranchit de tout pont thermique entre les spires d'une part, et entre les spires et le puits (14). Les spires consécutives du capillaire (10) sont donc isolées thermiquement les unes des autres. En outre, les spires du capillaire (10) sont isolées thermiquement du puits (14). Thus, with the introduction of this wire (15), it avoids any thermal bridge between the turns on the one hand, and between the turns and the well (14). The consecutive turns of the capillary (10) are therefore thermally isolated from each other. In addition, the turns of the capillary (10) are thermally isolated from the well (14).
Enfin, la présence du fil (15) confère une étanchéité du dispositif par rapport audit puits, contraignant le fluide basse pression à traverser les pastilles (5), et contribuant dès lors à optimiser le rendement du dispositif de l'invention. Finally, the presence of the wire (15) provides a seal of the device relative to said well, forcing the low pressure fluid to pass through the pellets (5), and therefore contributing to optimize the efficiency of the device of the invention.
Dans le cas particulier de la mise en œuvre du dispositif de l'invention à un détecteur infrarouge, la température de fonctionnement de ce dernier est comprise typiquement entre 77K et 250K. In the particular case of the implementation of the device of the invention to an infrared detector, the operating temperature of the latter is typically between 77K and 250K.
La pression du fluide haute pression est typiquement comprise entre quelques dizaines à quelques centaines de bars. The pressure of the high pressure fluid is typically between a few tens to a few hundred bars.
Le dispositif conforme à l'invention permet d'augmenter considérablement la surface d'échange thermique en comparaison avec les dispositifs de l'art antérieur, du type comprenant un capillaire à ailettes, typiquement de 1000 fois à encombrement constant. On conçoit dès lors aisément que l'efficacité d'une telle machine à froid est elle-même augmentée, ou que l'encombrement d'une telle machine à froid peut être signifïcativement réduit, tout en conservant les mêmes performances que les dispositifs de l'art antérieur. Ces résultats sont particulièrement appréciables dans le cadre des détecteurs infrarouges refroidis. The device according to the invention makes it possible to considerably increase the heat exchange area in comparison with the devices of the prior art, of the type comprising a finned capillary, typically 1000 times with constant bulk. It is therefore readily apparent that the efficiency of such a cold machine is itself increased, or that the size of such a cold machine can be significantly reduced, while maintaining the same performance as the devices of the invention. prior art. These results are particularly significant in the context of cooled infrared detectors.

Claims

REVENDICATIONS
Dispositif de génération de froid mettant en œuvre le principe de la détente de « Joule-Thomson », comprenant un échangeur thermique (1) au sein duquel circule à contre-courant un fluide sous haute pression et sous basse pression, caractérisé : Cold generating device implementing the "Joule-Thomson" expansion principle, comprising a heat exchanger (1) in which a fluid under high pressure and under low pressure flows in countercurrent, characterized:
■ en ce que Γ échangeur thermique est constitué de l'empilement de pastilles (5) réalisées en matériau poreux, et notamment fritté, constituant un mandrin cylindrique, à la périphérie et en contact duquel est enroulé un capillaire (10) au sein duquel circule le fluide haute pression, le fluide basse pression circulant à contre-courant à l'intérieur du mandrin poreux ainsi constitué ; ■ in that Γ heat exchanger consists of the stack of pellets (5) made of porous material, in particular sintered, forming a cylindrical mandrel, on the periphery and in contact with which is wound a capillary (10) in which circulates the high-pressure fluid, the low-pressure fluid circulating countercurrently within the porous mandrel thus formed;
■ et en ce qu'entre chacune des pastilles (5) est intercalé un élément poreux isolant thermique (9). ■ and in that between each of the pads (5) is interposed a porous thermal insulation member (9).
Dispositif de génération de froid selon la revendication 1, caractérisé en ce que l'élément poreux isolant thermique (9) est constitué d'un tissu, notamment réalisé en fibres de verre. Cold generating device according to claim 1, characterized in that the porous thermal insulating element (9) consists of a fabric, in particular made of glass fibers.
Dispositif de génération de froid selon l'une des revendications 1 et 2, caractérisé en ce que les pastilles (5) sont de forme cylindrique, en ce que les éléments intercalaires isolant thermique (9) sont de forme circulaire, et en ce que le diamètre des éléments intercalaires (9) est inférieur ou égal au diamètre externe des pastilles (5). Cold generating device according to one of claims 1 and 2, characterized in that the pellets (5) are of cylindrical shape, in that the thermal insulating spacer elements (9) are circular in shape, and in that the diameter of the intermediate elements (9) is less than or equal to the external diameter of the pellets (5).
Dispositif de génération de froid selon l'une des revendications 1 à 3, caractérisé en ce que les pastilles (5) sont réalisées à base de fritté d'argent ou de cuivre. Cold generating device according to one of claims 1 to 3, characterized in that the pellets (5) are made from sintered silver or copper.
Dispositif de génération de froid selon l'une des revendications 1 à 4, caractérisé en ce que le capillaire (10) est réalisé en métal, notamment en cuivre, en acier inoxydable, ou en alliage cupronickel. Cold generating device according to one of claims 1 to 4, characterized in that the capillary (10) is made of metal, in particular copper, stainless steel, or cupronickel alloy.
Dispositif de génération de froid selon la revendication 5, caractérisé en ce que le capillaire (10) reçoit un dépôt d'argent, fonction de la nature du matériau constitutif des pastilles (5), avant son enroulement sur le mandrin constitué par l'empilement des pastilles (5). 7. Dispositif de génération de froid selon l'une des revendications 1 à 6, caractérisé en ce que les spires définies par l'enroulement du capillaire (10) autour du mandrin constitué par l'empilement des pastilles (5) ne sont pas en contact les unes des autres. Cold generating device according to claim 5, characterized in that the capillary (10) receives a silver deposit, which is a function of the nature of the constituent material of the pellets (5), before it is wound on the mandrel formed by the stack pellets (5). 7. Device for generating cold according to one of claims 1 to 6, characterized in that the turns defined by the winding of the capillary (10) around the mandrel constituted by the stack of pellets (5) are not in contact each other.
8. Dispositif de génération de froid selon la revendication 7, caractérisé en ce qu'un fil isolant thermique (15) est enroulé sur les intervalles séparant les spires, ledit fil étant notamment réalisé à base de fibres de verre. 8. Device for generating cold according to claim 7, characterized in that a thermal insulating wire (15) is wound on the intervals between the turns, said wire being in particular made of glass fibers.
EP17735183.0A 2016-06-06 2017-06-02 Cryogenic device with compact exchanger Active EP3465030B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201730180T SI3465030T1 (en) 2016-06-06 2017-06-02 Cryogenic device with compact exchanger

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1655128A FR3052245B1 (en) 2016-06-06 2016-06-06 CRYOGENIC DEVICE WITH COMPACT EXCHANGER
PCT/FR2017/051390 WO2017212148A1 (en) 2016-06-06 2017-06-02 Cryogenic device with compact exchanger

Publications (2)

Publication Number Publication Date
EP3465030A1 true EP3465030A1 (en) 2019-04-10
EP3465030B1 EP3465030B1 (en) 2020-01-29

Family

ID=57233543

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17735183.0A Active EP3465030B1 (en) 2016-06-06 2017-06-02 Cryogenic device with compact exchanger

Country Status (8)

Country Link
US (1) US20190120529A1 (en)
EP (1) EP3465030B1 (en)
KR (1) KR102260700B1 (en)
CN (1) CN109073293B (en)
FR (1) FR3052245B1 (en)
IL (1) IL262395B (en)
SI (1) SI3465030T1 (en)
WO (1) WO2017212148A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111912132A (en) * 2020-06-05 2020-11-10 中国空间技术研究院 Joule-Thomson refrigerating device and preparation method thereof
CN114087810B (en) * 2021-11-16 2022-08-05 西安交通大学 Throttling refrigerator
CN114754507A (en) * 2022-03-11 2022-07-15 上海铂钺制冷科技有限公司 Composite low-temperature negative-pressure dividing wall type heat exchanger for extremely-low-temperature region refrigerator

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB945223A (en) * 1961-09-22 1963-12-23 Atomic Energy Authority Uk Improvements in or relating to refrigerators
FR2477406A1 (en) * 1980-03-06 1981-09-11 Commissariat Energie Atomique Surgical cryoprobe for destroying diseased cell tissue esp. cancer - can fit inside endoscope for internal surgery
SU903667A1 (en) * 1980-05-12 1982-02-07 Предприятие П/Я М-5727 Microcooler
JPH0684852B2 (en) * 1986-01-20 1994-10-26 株式会社東芝 Cryogenic refrigerator
US4781033A (en) * 1987-07-16 1988-11-01 Apd Cryogenics Heat exchanger for a fast cooldown cryostat
JP3674791B2 (en) * 1994-07-14 2005-07-20 アイシン精機株式会社 Cooling system
US20010030040A1 (en) * 1999-12-23 2001-10-18 Jia Hua Xiao Miniature cryogenic heat exchanger
WO2003081145A1 (en) * 2002-03-22 2003-10-02 Sumitomo Heavy Industries, Ltd. Cryogenic temperature cool storage device and refrigerator
US7160291B2 (en) * 2003-06-25 2007-01-09 Endocare, Inc. Detachable cryosurgical probe
JP2005342280A (en) * 2004-06-04 2005-12-15 Mie Kagaku Kogyo Kk Warming bag body
BR112012004757A2 (en) * 2009-09-02 2018-03-13 Invensor Gmbh feeding and surface distribution of a refrigerant to a heat exchanger in sorption machines.
CN103423911B (en) * 2012-06-25 2015-10-28 上海理工大学 Refrigerator
CN103615823B (en) * 2013-12-09 2015-11-25 武汉高芯科技有限公司 A kind of can the Stirling-throttling composite refrigerator of fast-refrigerating
US20170146268A1 (en) * 2015-11-24 2017-05-25 General Electric Company Water Chiller Apparatus

Also Published As

Publication number Publication date
IL262395A (en) 2018-12-31
KR20190015202A (en) 2019-02-13
FR3052245B1 (en) 2019-06-14
US20190120529A1 (en) 2019-04-25
IL262395B (en) 2020-10-29
KR102260700B1 (en) 2021-06-03
EP3465030B1 (en) 2020-01-29
FR3052245A1 (en) 2017-12-08
WO2017212148A1 (en) 2017-12-14
SI3465030T1 (en) 2020-03-31
CN109073293A (en) 2018-12-21
CN109073293B (en) 2020-07-03

Similar Documents

Publication Publication Date Title
EP3465030B1 (en) Cryogenic device with compact exchanger
EP2181301B1 (en) Thermal regulation passive device with fluid micro loop and capillary pumping
FR2560421A1 (en) Cooling device for superconducting windings
EP2179240A1 (en) Passive device with fluid micro loop and capillary pumping
CH620289A5 (en)
CA2155401C (en) Superconducting electrical connection
CH618817A5 (en)
EP3671065A1 (en) Cooling device comprising a paramagnetic garnet ceramic
CA2055809C (en) Process for refrigerating a busway for very low temperature electrical material and device for carrying such
EP0325873B1 (en) Liquefied gas transfer line having at least one vapour derivation
EP0449736B1 (en) Thermal buckler
EP2038978B1 (en) Electric feedthrough structure for superconductor element
EP0258093B1 (en) Joule-thomson cooler and cryostat provided with this cooler
FR2622427A1 (en) Compact nuclear magnetic resonance imaging apparatus
FR2972890A1 (en) INDUCTIVE SYSTEM THAT CAN SERVE COLD CUP
EP0520374B1 (en) Structure for conducting electric current to an installation working at a very low temperature
FR2925760A1 (en) COOLING AN X-RAY GENERATING TUBE
FR3119675A1 (en) ELECTROMAGNETIC RADIATION DETECTION SYSTEM AND COOLING METHOD
EP0537073A1 (en) Current lead for cryogenic use and for a cryogenic device
FR2621439A1 (en) Resonant cavity, coupling device, particle acclerator and travelling-wave tube including such cavities
FR2622372A1 (en) ELECTRIC MACHINE ROTOR WITH SUPERCONDUCTING EXCITATION WINDING
FR2627898A1 (en) HF high powder electron tube with fluid flow cooling - has envelope covering anode and containing cooling fluid which is directed by projection of internal wall over anode surface
WO2009102184A1 (en) Electrical superconductor system
FR2632760A1 (en) INTERNAL SHELL OF A FAST NEUTRAL NUCLEAR REACTOR COMPRISING A THERMAL PROTECTION DEVICE
FR2756090A1 (en) GRID DEVICE FOR EXTERNAL COOLING OF CONTAINERS FOR RADIOACTIVE MATERIALS

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20181024

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20191002

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LYNRED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1228786

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200215

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602017011258

Country of ref document: DE

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200429

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200621

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200430

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200429

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200529

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602017011258

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1228786

Country of ref document: AT

Kind code of ref document: T

Effective date: 20200129

REG Reference to a national code

Ref country code: DE

Ref legal event code: R079

Ref document number: 602017011258

Country of ref document: DE

Free format text: PREVIOUS MAIN CLASS: F25B0041060000

Ipc: F25B0041300000

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20201030

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200602

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20200630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200602

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20200129

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20230525

Year of fee payment: 7

Ref country code: FR

Payment date: 20230627

Year of fee payment: 7

Ref country code: DE

Payment date: 20230613

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SI

Payment date: 20230522

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230620

Year of fee payment: 7