EP0631096B2 - Trockeneisvorratsfach - Google Patents

Trockeneisvorratsfach Download PDF

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Publication number
EP0631096B2
EP0631096B2 EP94401392A EP94401392A EP0631096B2 EP 0631096 B2 EP0631096 B2 EP 0631096B2 EP 94401392 A EP94401392 A EP 94401392A EP 94401392 A EP94401392 A EP 94401392A EP 0631096 B2 EP0631096 B2 EP 0631096B2
Authority
EP
European Patent Office
Prior art keywords
tank
liquid
injector
upper wall
towards
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.)
Expired - Lifetime
Application number
EP94401392A
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English (en)
French (fr)
Other versions
EP0631096B1 (de
EP0631096A1 (de
Inventor
Claude Gibot
Philippe Bouguet
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.)
Carboxyque Francaise SA
Original Assignee
Carboxyque Francaise SA
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Publication date
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Application filed by Carboxyque Francaise SA filed Critical Carboxyque Francaise SA
Publication of EP0631096A1 publication Critical patent/EP0631096A1/de
Publication of EP0631096B1 publication Critical patent/EP0631096B1/de
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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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D29/00—Arrangement or mounting of control or safety devices
    • F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
    • F25D3/125—Movable containers

Definitions

  • the present invention relates to a carbon dioxide snow bin.
  • an insulated enclosure is generally used without carbon dioxide snow reserve and previously brought to the refrigerated storage temperature of the products before their storage in the enclosure and the shipment of the loaded enclosure, which requires that the transport time be reduced to a minimum.
  • Patent application FR-A-2534130 describes a means allowing the distribution of meals of the kind of those made up by an insulated trolley with a perforated container likely to contain dry ice.
  • US-A-3561266 relates to a method and an apparatus for refrigerating truck and truck rooms.
  • rail cars used to transport food requiring refrigeration; refrigeration being carried out at by means of a container mounted in said chamber and filled with a block of solid refrigerant.
  • Patent application FR-A-2604243 describes, for its part, a manufacturing process, using carbon dioxide liquid, a cold accumulating mass with a clean packaging.
  • the subject of the present invention is a storage tank and a reserve of dry ice according to the claim 1 and an insulated transportable enclosure provided with such a tank.
  • FIG 1 we recognize a transportable insulated container 1 for the transport of fresh products, as described in document EP-A-337 860 mentioned above. comprising a side access door omitted from the drawing to show the dry ice bin 2 suspended in the upper part of the interior chamber of the container forming a volume 3 of product loading.
  • the typically removable heat shield 4. extending at a distance from the inner face of the container 2 and separating the latter from the volume 3 for loading and storing fresh food products.
  • the tank 2 is mounted fixed in the container 1 and comprises. in the example shown, a front face provided with an access opening 5 for loading CO 2 from the tank. as we will see later.
  • the installation comprises, in a loading station, a tank 6 of liquid CO 2 at a pressure typically between 18 and 20 ⁇ 10 5 Pa and at a temperature of -20 ° C. maintained by a refrigeration unit 7. From the tank 6 leaves a liquid CO 2 supply pipe 8 provided with adequate winnowing, extended by a flexible hose 9 terminated by a distributor means 10 for introducing a flow of liquid CO 2 under pressure into the tank 2 via the opening 5.
  • the distributor means 10 in this case in the form of a pistol in the example shown, is suspended by an elastic suspension means 11 from an upper frame 12 secured to an articulated awning structure 13 provided with deployable lateral flaps 14 and intended for be positioned opposite the loading face of the container 1 to form a receptacle for confining the cold gases generated during the loading of the tank 2, which are evacuated to the outside of the work premises by an evacuation device tion 15 comprising a blower.
  • the suspension means 11 can be moved along the upper part of the frame 12 by a carriage 16 to allow the correct positioning of the gun 10 opposite the opening 5 of the loading of the tank 2.
  • the gun 10 typically comprises a manual closing / opening valve 17 and, upstream of this, a solenoid valve 18 connected to a control unit 19 mounted on the canopy 13.
  • the housing command 19 includes adjustable or pre-established time-delay means making it possible to select, according to different parameters, the opening times of the solenoid valve 18, therefore the quantities of liquid CO 2 injected into the tank 2 and, consequently, the quantities of carbon dioxide snow formed by sublimation in the tank.
  • This injection is typically carried out so that the liquid CO 2 jet undergoes at least one impact in the tank 2 so as to burst the jet and cause rapid production and accumulation of carbon dioxide snow in the tank.
  • FIG. 2 shows a curve showing the carbon dioxide snow formation regime in tank 2 as a function of the time of injection of liquid CO 2 in seconds.
  • the container 1 and its container 2 being initially at room temperature, the quantity of carbon dioxide snow formed within 10 seconds of injection cannot be reproducibly determined.
  • the points A to D of the curve represent jumps in the transformation rate of liquid / solid CO 2 as and when injected into the tank. At point A, the conversion rate is around 21%. It gradually increases to a value of around 35% up to point B, from which it remains substantially constant up to point C to increase again to a value slightly greater than 40% at point D to remain substantially constant beyond this point D. It is therefore found that an amount of 5 kg of carbon dioxide snow is generated in less than 20 seconds and that an injection time of 25 seconds is sufficient to generate a dry ice mass of 10 kg.
  • the flexibility of the method according to the invention makes it possible to easily modulate, depending on predetermined parameters, taking into account in particular the climatic conditions and the planned transport times, the amount of dry ice generated in the container, as well as adapting the amounts of dry ice the storage and transport of fresh food products, the temperature of which must be between 0 and 4 ° C, like frozen products, the temperature of which should not exceed -15 ° C.
  • the different injection times can be ored-established in the case 19 and selectable by fresh / frozen, winter / summer or week / weekend switches. These injection times can also be pre-programmed in memories of the housing 19 accessible by dialing codes on a keyboard or by introducing a smart card incorporating such programmable memories (SRAM or EEPROM).
  • SRAM programmable memories
  • FIG. 3 the temperature variations over time of a steak chopped in an enclosure have been represented. according to the invention (curve 2) and in an enclosure with simple prior cooling of the product and its container (curve 1).
  • the heat shield 4 is removably mounted suspended in the upper part of the container 1 for use in the conservation and transport of fresh products, this heat shield being dismantled in the configuration for the storage and transport of frozen products less sensitive to the proximity of the very cold surface formed by the underside of tank 2.
  • the tray 2 according to the invention is in the form of a housing closed parallelepiped made of metal sheets, typically stainless steel and comprising in particular a upper wall 20 and a front face 21 crossed, in the vicinity of a side wall 22, by a nozzle 50.
  • This nozzle 50 constitutes the extension projecting towards the outside of an injection ramp 23 extending into the housing along the side wall 22 and typically formed, on its side opposite to the wall 22, with a series of evenly distributed ejection orifices 24.
  • the ramp 23 supports an L-shaped deflector profile 25 extending parallel to the facing ramp orifices 24.
  • the upper wall 20 of the tank 3 has a central cutout covered with a grid 26 so to provide, on either side of the grid 26, a first solid zone 20A overhanging the injection rail assembly 23 / deflector 25 and a second symmetrical full zone 20B.
  • the orifices 24 are oriented so as to each eject a jet of liquid CO 2 towards the bottom wall of the tank 2, this jet being returned, by the deflector 25 placed under the orifices 24, towards the full veil part 20A of the upper wall 20 and from there towards the bottom of the housing under the second full veil part 20B, opposite the injection ramp 23, where it gradually accumulates, by sublimation , a mass of dry ice 27, the CO 2 vaporized during the constitution of this mass 27 escaping, as shown by the arrows dashed in FIG. 5, by the mesh 26 and spreading in the interior space 3 of the container 1 to cool the latter, before being evacuated by the hood 13.
  • the tank 2 also has fixing lugs 28 for its permanent mounting in the upper part of the interior volume 3, typically on vertical posts also used for mounting removable screen thermal 4 extending below the tank 2, at a distance from the latter, when the container 1 is used for the transport of fresh food products at a temperature between 0 and 4 ° C.
  • the distributor means 10 suspended from the gantry 12, is internally shaped to adapt by simply plugging in the end piece 50, this plugging being locked by an elastic lock 29 which can be actuated manually to unlock the gun and extract it from the nozzle 50.
  • the crankcase of the tap 17 is also coupled mechanically to the latch 29 so as to allow the valve to be opened only when the connector 10 is correctly plugged into the nozzle 50 and only allow plugging in when the tap is in the closed position.
  • the tray 2 has no front face, thus providing a wide access opening 5 for pairing with a distributor means 10, also suspended from the gantry 12 and comprising, here, a parallelepipedal injection box 30 comprising an open front face and two injection half-ramps 23A, 23B extending transversely in the housing 30, provided with ejection orifices 24 and connected, via the solenoid valve 18, to the supply hose 9.
  • a distributor means 10 also suspended from the gantry 12 and comprising, here, a parallelepipedal injection box 30 comprising an open front face and two injection half-ramps 23A, 23B extending transversely in the housing 30, provided with ejection orifices 24 and connected, via the solenoid valve 18, to the supply hose 9.
  • the ramps 23A, 23B are arranged in the bottom of the housing 30, at a distance of the open front face of the case, the edges of which are provided with angles 31 forming a housing for receiving the edges of the front face of tank 2 in a position of coupling of these two elements locked by a device coupling 32 constituted, in the example shown, by a lock movable in rotation and in translation carried by a side face of the housing 30 and cooperating with a shaped cut formed in a cylinder attached to the adjacent side face of tank 2.
  • the lock comprises an actuating handle which, in the locked position of the lock, actuates a contactor 33 mounted on the inside of the housing 30 and providing a validation signal to the block electronic control unit 19.
  • the housing 30 advantageously comprises, on its rear face, a handling handle 34.
  • the injectors 24 are angularly oriented towards the upper wall of the housing 30 so as to eject jets of liquid CO 2 under pressure from impacting this upper wall to return, by bursting, the jets of Liquid CO 2 towards the bottom of the tank 2 where the liquid CO 2 , relaxed in its path with ricochet, produces the carbon dioxide snow finely divided 27 gradually accumulating in the bottom of the tank 2, as in the embodiment Figures 4 and 5.
  • the injectors 24 can be oriented downward to impact a deflector returning the jets to the upper wall of the housing.
  • an end-of-cycle indicator lamp lights up on the block 19 and the operator can then come and unhook the box 30 from the tank 2.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Carbon And Carbon Compounds (AREA)

Claims (5)

  1. Zur Anordnung in einem isolierten Gehäuse (1) zur Konservierung von Waren bestimmtes Trockeneisvorratsfach, ausgebildet als geschlossener Kasten (2), umfassend eine mit mindestens einer Öffnung versehene obere Wand (20) und eine Vorderseite (21), die von einem mit mindestens einem in dem Fach angeordneten Injektor (23, 24) verbundenen und zur Verbindung des Injektors mit einer Leitung (9) zum Heranführen von unter Druck stehendem Flüssig-CO2 bestimmten Anschlußstutzen (50) durchgriffen wird, wobei das Fach im wesentlichen als Parallelepiped ausgebildet ist, der Injektor (23, 24) nahe an einer Seitenwand (22) des Fachs (2) angeordnet ist und mindestens eine zur Lenkung eines Flüssig-CO2-Strahls in Richtung des Fachinneren ausgerichtete Ausstoßöffnung aufweist, dadurch gekennzeichnet, daß das Fach ein mit dem Injektor (23, 24) verbundenes Ablenkmittel (25) umfaßt, wobei die Ausstoßöffnung so ausgerichtet ist, daß sie den Flüssig-CO2-Strahl auf das Ablenkmittel (25) lenkt, und daß die obere Wand einen ersten, undurchlässigen, den Injektorbereich (23, 24) abdeckenden Bereich (20A) umfaßt, wobei die Öffnung (24) gegen die untere Wand des Fachs gerichtet ist und das Ablenkmittel so angeordnet ist, daß der Flüssig-CO2-Strahl auf den ersten, undurchlässigen Bereich (20A) der oberen Wand (20) umgelenkt wird.
  2. Fach nach Anspruch 1, dadurch gekennzeichnet, daß die Öffnung (26) der oberen Wand (20) vergittert ist.
  3. Transportierbares, isoliertes Gehäuse mit einem in dem Gehäuse (1) dauerhaft befestigten Fach nach Anspruch 1 oder 2.
  4. Gehäuse nach Anspruch 3, gekennzeichnet durch eine zwischen dem Fach (2) und dem Innenraum zur Warenbeschickung (3) angeordnete, entfernbare, thermische Abschirmung (4).
  5. Gehäuse nach Anspruch 4, gekennzeichnet durch eine seitliche, verschließbare Öffnung als Zugang zum Innenraum und zum Fach (2).
EP94401392A 1993-06-23 1994-06-22 Trockeneisvorratsfach Expired - Lifetime EP0631096B2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR9307615 1993-06-23
FR9307615A FR2706990B1 (de) 1993-06-23 1993-06-23
US08/285,718 US5511379A (en) 1993-06-23 1994-08-04 Process for the preservation of products at low temperature in an insulated chamber, installation for practicing the process, insulated chamber and container for such a chamber
CA002129863A CA2129863A1 (fr) 1993-06-23 1994-08-10 Procede de conservation a basse temperature de produits dans une enceinte isolee, installation pour la mise en oeuvre du procede, enceinte isolee et bac pour une telle enceinte
CH02814/94A CH690458A5 (fr) 1993-06-23 1994-09-15 Procédé de conservation à basse température de produits dans une enceinte isolée, installation pour la mise en oeuvre du procédé, enceinte isolée et bac pour une telle enceinte.

Publications (3)

Publication Number Publication Date
EP0631096A1 EP0631096A1 (de) 1994-12-28
EP0631096B1 EP0631096B1 (de) 1997-07-16
EP0631096B2 true EP0631096B2 (de) 2001-02-07

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ID=27427162

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94401392A Expired - Lifetime EP0631096B2 (de) 1993-06-23 1994-06-22 Trockeneisvorratsfach

Country Status (7)

Country Link
US (2) US5511379A (de)
EP (1) EP0631096B2 (de)
CA (1) CA2129863A1 (de)
CH (1) CH690458A5 (de)
DE (1) DE69404231T3 (de)
ES (1) ES2106468T5 (de)
FR (1) FR2706990B1 (de)

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Publication number Priority date Publication date Assignee Title
EP2025249A1 (de) 2007-07-31 2009-02-18 Konings NV Verfahren zum Kühlen von Getränken

Also Published As

Publication number Publication date
EP0631096B1 (de) 1997-07-16
CH690458A5 (fr) 2000-09-15
ES2106468T5 (es) 2001-03-16
FR2706990A1 (de) 1994-12-30
CA2129863A1 (fr) 1996-02-11
DE69404231T3 (de) 2001-05-23
DE69404231T2 (de) 1997-12-18
ES2106468T3 (es) 1997-11-01
US5566553A (en) 1996-10-22
FR2706990B1 (de) 1995-08-04
US5511379A (en) 1996-04-30
DE69404231D1 (de) 1997-08-21
EP0631096A1 (de) 1994-12-28

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