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
  • 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 invention relates to the field of transportation of perishable foodstuffs in isothermal containers, where the maintenance of the cold chain is provided by solid phase carbon dioxide ("dry ice").
• Such isothermal containers commonly include a cryogenic compartment disposed in the upper part of the container, above the compartment where are placed the products to be kept at controlled temperature.
• the cryogenic compartment is materialized (by rails, a bottom wall, etc.) or not according to the case.
• this upper compartment receives a reservoir intended to contain a refrigerant, such as carbon dioxide in the solid phase, the sublimation of which releases cold gases compensating the heat input through the joints between the container and its door or to through the insulation of the container.
• a refrigerant such as carbon dioxide in the solid phase
• cryogenic compartment in which the cryogenic mass is stored, is provided with means (typically in the form of grids) making it possible to retain the loaded carbon dioxide snow while allowing the gas to pass through, and so organize the fact that during the loading of the fluid reservoir, one proceeds to the recovery of gas in the ambience of the premises using an extractor.
• EP-631 096 illustrates this state of the art.
• cryogenic compartment exchange cold (cold) with products that through the cold horizontal wall that separates the two compartments, which is quite insufficient;
• One of the objectives of the present invention is then to propose a new reservoir or receptacle of dry ice, which certainly makes it possible to recover the gases resulting from the injection of liquid CO 2 and to route them outside the premises without modifying the environment. but also a reservoir that is autonomous that is to say that can adapt to any type of insulated container on the market, in standard version, and whose autonomy allows even the filling of the tank outside the container and the loading subsequent tank in the container.
• cryogenic tank able to contain a cryogenic mass and to be mounted in the cryogenic compartment of an isothermal storage container. and / or transporting perishable food products
• the tank being provided with means for connecting a source of carbon dioxide in the liquid phase and means of separation retaining the carbon dioxide snow but allowing the gas to pass, and characterized in that it includes:
• a carbon dioxide snow tray of substantially parallelepiped shape, provided on the one hand with injection means adapted to cooperate with an injector connected to a source of liquid CO 2 and allow the injection of dry ice in the tank, and on the other hand whose upper face has a perforation zone capable of allowing the evacuation of the gas generated inside the tray;
• a lid made integral with the upper face of the holding tank so as to leave between the upper face and the lid a space for the accumulation of the generated gas
• the lid also leaves a space to allow, apart from the outward evacuation phases of the generated gases, the passage of the gases generated from the tray to the product storage compartment.
• the reservoir comprises a heat shield made of a thermally insulating material, preferentially removable, and able to be installed under the tray to protect the food stored in the container from radiation.
• the injection means are adapted to cooperate with an injector equipped with a horizontal-cylindrical cylindrical outlet nozzle, extending towards the inside of the tank, adapted to direct the injection of dry ice substantially tangentially to a side wall of the tray so as to create a vortex in the tray.
• the tank according to the invention is adaptable to all types of container, and the term "cryogenic compartment” must be understood to mean a space traditionally located in the upper part of the container, this space being or not materialized (by rails, a lower wall etc.).
• FIG. 1 is a partial schematic representation of a tank according to the invention.
• FIG. 2 is a partial schematic representation of a tank according to the invention for viewing one of the injection modes using a cylindrical shaped outlet nozzle with a horizontal axis, extending towards the inside of the tank , adapted to create a vortex structure;
• FIG. 2 is a partial schematic representation of a tank according to the invention for visualizing one of the injection modes using an outlet nozzle 6 of cylindrical shape with a horizontal axis, extending towards the inside of the tank , and which is adapted to create a vortex structure 7. It has been found in practice that such a nozzle shape produces snow which is stored in a geometric Vortex motion by allowing nearly 90% of the volume of the receptacle to be occupied.
• Figure 3 is a partial schematic sectional representation of a container equipped with a tank according to the invention, shown open door to view the assembly of the tank in the upper part of the container.
• the tank is self-contained and adaptable to all types of isothermal containers, it can be slid in horizontal slides provided in the walls of the cryogenic compartment of the container, or fixed by any other mode according to the request of the end user.
• the tank here is not “sealed", it allows the escape of gases: when filling via the suction system that is branch on the front side, and in stable operation (food preservation) by the fact that the lid leaves a space not only above the upper face of the tray (which is provided with the mesh surface) but also in the front, to allow the gas, in operation, closed door, to reach the product storage compartment and perform its function of conservation / cooling products.
• the tank is autonomous and adaptable to all types of insulated containers.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Thermal Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Filling Or Discharging Of Gas Storage Vessels (AREA)
• Packages (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

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Cited By (4)

Citations (5)

Family Cites Families (4)

• 2005
  • 2005-09-28 FR FR0552939A patent/FR2891354B1/fr active Active
• 2006
  • 2006-09-07 WO PCT/FR2006/050849 patent/WO2007036656A1/fr active Application Filing
  • 2006-09-07 ES ES06820252.2T patent/ES2568242T3/es active Active
  • 2006-09-07 EP EP06820252.2A patent/EP1934537B1/fr active Active
  • 2006-09-07 DK DK06820252.2T patent/DK1934537T3/en active

Patent Citations (5)

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