EP0341131A1 - Verfahren und Raum zur thermischen Behandlung mit einer Abkühlungsstufe - Google Patents

Verfahren und Raum zur thermischen Behandlung mit einer Abkühlungsstufe Download PDF

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Publication number
EP0341131A1
EP0341131A1 EP89401182A EP89401182A EP0341131A1 EP 0341131 A1 EP0341131 A1 EP 0341131A1 EP 89401182 A EP89401182 A EP 89401182A EP 89401182 A EP89401182 A EP 89401182A EP 0341131 A1 EP0341131 A1 EP 0341131A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
gas
treatment
gases
cooling phase
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
EP89401182A
Other languages
English (en)
French (fr)
Other versions
EP0341131B1 (de
Inventor
Claude Gibot
Jean-Pierre Peyremorte
Richard Sojka
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.)
NOUVELLE DES ETABLISSSEMENTS J LAGARDE Ste
Carboxyque Francaise SA
NOUVELLE des Ets J LAGARDE STE
Original Assignee
NOUVELLE DES ETABLISSSEMENTS J LAGARDE Ste
Carboxyque Francaise SA
NOUVELLE des Ets J LAGARDE STE
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 NOUVELLE DES ETABLISSSEMENTS J LAGARDE Ste, Carboxyque Francaise SA, NOUVELLE des Ets J LAGARDE STE filed Critical NOUVELLE DES ETABLISSSEMENTS J LAGARDE Ste
Publication of EP0341131A1 publication Critical patent/EP0341131A1/de
Application granted granted Critical
Publication of EP0341131B1 publication Critical patent/EP0341131B1/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
    • F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
    • F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
    • F25D3/102—Stationary cabinets

Definitions

  • the present invention relates to an enclosure for heat treatment as well as to a heat treatment method comprising a cooling phase using cryogenic fluid.
  • loads of numerous products or objects are treated by cooking and / or sterilization then cooling.
  • This treatment generally includes a hot step, sterilization or cooking followed by cooling.
  • the hot stage can be carried out with steam, which is very satisfactory in terms of processing speed and temperature uniformity within the products. Cooling is necessary for the subsequent handling of the objects in the case of sterilization or preservation. products in the case of food products.
  • Cooling for economic reasons (speed) or for reasons of quality of the cooked products (in the case of food products) must be carried out according to temperature profiles over time which are precise and restrictive for manufacturers.
  • the immersion technique allows more homogeneous cooling, but this process is limited to positive cooling on the order of + 10 ° C, and for treatment times on the order of 2 hours.
  • both immersion and the spraying of chilled water require storage of water conditioning at + 1 or 2 ° C, including cold groups (size and high cost, significant maintenance); they are incompatible with the cooling of unpackaged bulk products; and finally they require treatment of the water before use to obtain a bactericidal state (chlorination for example), the suitable bacteriological agent tending to degrade the material by physico-chemical attack (inter-granular corrosion).
  • the present invention provides a solution to the lack of temperature uniformity while maintaining efficient cooling kinetics whatever the load to be cooled (product in sealed packaging or product in bulk).
  • the temperature setpoint can be negative.
  • the method and the enclosures according to the invention can be implemented and used in the food industries, the pharmaceutical industries, in hospital pharmacy, in the chemical, plastics and composites industries, for the heat treatment of materials and in industry electronic.
  • the present invention relates to a heat treatment chamber for a load comprising at least one door, internal walls delimiting a treatment space and gas recirculation passages, means for circulating the gases in the treatment space and said passages, characterized in that said means for circulating the gases extract the gases from said space and send them into said passages and in that the enclosure is further provided with means for injecting fluid cryogenic and gas evacuation means.
  • the treatment can therefore according to the invention take place in a single enclosure, so that all of the treatment, even when it comprises a final phase of deep-freezing, can be carried out without manipulation of one enclosure in another enclosure, and without handling or movement of the load in the enclosure where the cooling is perfectly homogeneous.
  • the enclosures are generally cylindrical and heat-insulated, using steam as the heat transfer fluid and intended to treat products in cooking, pasteurization, sterilization, or any other type of heat treatment, followed by cooling.
  • enclosures are autoclaves, capable of working under pressure.
  • the present invention also relates to a method of treatment in an enclosure of a load of products and / or objects comprising a cooling phase, characterized in that to carry out the cooling phase, a flow of cryogenic gas is circulated to through the charge, a cryogenic fluid is injected into the flow of gas leaving the charge and the cooled gas is recirculated to make it pass through the charge again in the same direction.
  • Figure 1 shows a partial sectional view along A of an enclosure according to the invention and Figure 2 shows an axial sectional view along B.
  • Figure 3 shows the temperature versus time for different coolants.
  • the cylindrical enclosure 1 with heat-insulated walls capable of withstanding an overpressure comprises a door 2 .
  • a load 3 of products to be treated is placed in the treatment space 4 delimited by the walls 5.5 ′ of the enclosure 1 , the partitions 6.6 ′ , the door 2 and the truncated cone disposed at the end of the enclosure opposite door 2 .
  • the partitions 6,6 ′ and the cone 7 delimit passages 9,9 ′, 9 ⁇ .
  • the fan 8 is capable of sucking the gas flow out of the treatment space 4 by the cone 7 .
  • the opening 10 of the truncated cone 7 is opposite the fan 8 .
  • the wall of the enclosure 1 is crossed near the fan 8 by at least one pipe 11 for supplying cryogenic fluid provided inside the enclosure 1 with a spray nozzle 12 directing the sprayed fluid towards the fan blades 13 .
  • FIG. 1 Three nozzles are provided, as shown in FIG. 1 where a pipe 14 provided with a valve 15 makes it possible to distribute the cryogenic fluid coming from a reservoir not shown in three nozzles, but only one nozzle 12 is shown in detail. The number of nozzles depends on the capacity of the autoclave.
  • a gas discharge orifice 16 is also provided in the wall 5 of the enclosure.
  • the evacuation of gases is controlled by a valve 17 .
  • the nozzle 12 can be a nozzle for spraying carbon dioxide or liquid nitrogen.
  • the fan 8 When the fan 8 is operating, it circulates the gases as indicated in the figures by the arrows. The gas flow passes through the load 3 placed in the treatment space in the direction of the fan 8 which flows back towards the space 9 ⁇ . During this passage through the charge, it heats up giving its frigories. The cryogenic fluid injected by the nozzle (s) on the blades is refluxed with the gas heated in the space 9 ⁇ . In space 9 ⁇ , the mixture of gas and the cryogenic fluid supply recirculates through passages 9 and 9 ′ towards the opposite end of the autoclave, and crosses the load in the direction of the fan.
  • the method according to the invention can prohibit any contact between the gas and the load during the recirculation.
  • the pressure is regulated by the valve 17 closing the orifice 16 for the gas outlet.
  • the orifice 16 is placed as close as possible to the end of the load, and if possible after the load on the side of the fan.
  • the fan serves as a "flow or ventilated atmosphere + intake” mixer and delivers a homogeneous gas in temperature on its periphery.
  • the cryogenic fluid and the flow thus mix perfectly during their passage through the space 9 ⁇ and the passages 9 and 9 ′ before passing through the charge.
  • the arrangement of the nozzle in the treatment space 4 and not in the space 9 ⁇ has an advantage because the propeller shaft is protected, since it is located in an area not interested in ventilation.
  • the orientation of the nozzle and its positioning in the autoclave, preferably near the fan allow when the solenoid valve opens a total transformation of the liquid CO2 into the gaseous phase by delivering the maximum of frigories.
  • the nozzle directs the jet of CO2 towards the "reaction" propeller for ventilating the autoclave so as to almost instantaneously mix the supply of CO2 with the ventilated atmosphere.
  • the pressure in the autoclave can be regulated.
  • liquid nitrogen can be used.
  • the method according to the invention can be adapted to many types of treatment, both cooking and cooling of packaged foodstuffs or the sterilization and cooling of objects for the pharmaceutical industry and the treatment of blood products in bags. .
  • the temperature must drop from a cooking temperature of the order of 60 ° to 90 ° C, in less than two hours, to a temperature of 10 ° C at its core.
  • This profile can be respected with CO2 for example, as it appears on figure 3, in a sure way (3 ° C reached) and faster than with forced air (cooled on finned exchanger by fresh water in circulation ) or sprayed 2 ° C ice water.
  • An advantage of the process according to the invention appears when consumable products packaged under gas are cooked and then cooled. Indeed, it is then important that the pressure remains relatively constant during the entire treatment in the enclosure, especially for the appearance of the product.
  • the pressure profile is easily controllable when all the treatment is carried out under cold gas or even hot then cold.
  • the method according to the invention also comprises, or as a cold step, the freezing of the products.
  • CO2 in particular has an advantageous bacteriostatic effect compared to water or air.

Landscapes

  • 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)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
EP89401182A 1988-05-02 1989-04-26 Verfahren und Raum zur thermischen Behandlung mit einer Abkühlungsstufe Expired - Lifetime EP0341131B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805879A FR2630818B1 (fr) 1988-05-02 1988-05-02 Enceinte et procede de traitement thermique comportant une phase de refroidissement
FR8805879 1988-05-02

Publications (2)

Publication Number Publication Date
EP0341131A1 true EP0341131A1 (de) 1989-11-08
EP0341131B1 EP0341131B1 (de) 1993-09-29

Family

ID=9365908

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401182A Expired - Lifetime EP0341131B1 (de) 1988-05-02 1989-04-26 Verfahren und Raum zur thermischen Behandlung mit einer Abkühlungsstufe

Country Status (7)

Country Link
US (2) US4878353A (de)
EP (1) EP0341131B1 (de)
AU (1) AU632746B2 (de)
CA (1) CA1332111C (de)
DE (1) DE68909484T2 (de)
ES (1) ES2044162T3 (de)
FR (1) FR2630818B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5879732A (en) 1996-09-10 1999-03-09 Boc Group, Inc. Food processing method
JP3346716B2 (ja) * 1997-02-14 2002-11-18 東京エレクトロン株式会社 基板冷却方法および基板冷却装置
US7905154B2 (en) * 2004-11-29 2011-03-15 Jones Jr Arthur T Apparatus and method of contaminant detection for food industry
EP2193307B1 (de) * 2007-08-28 2014-04-23 Air Products and Chemicals, Inc. Vorrichtung und verfahren zur bereitstellung von kondensations- und frostfreien oberflächen auf kryogenen komponenten
US9587873B2 (en) * 2012-03-27 2017-03-07 Global Cooling, Inc. Energy efficient biological freezer with vial management system
CN106766514A (zh) * 2016-12-02 2017-05-31 青岛海尔股份有限公司 冷藏冷冻设备

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1588664A (de) * 1967-10-13 1970-04-17
FR2019050A1 (de) * 1968-09-27 1970-06-26 Universal Oil Prod Co
FR2462673A1 (fr) * 1979-08-03 1981-02-13 Carboxyque Francaise Enceinte de refrigeration
US4304293A (en) * 1979-06-18 1981-12-08 Helmholtz-Institut Fur Biomedizinische Technik Process and apparatus for freezing living cells
CA1128329A (en) * 1981-04-24 1982-07-27 Douglas Hurst Cryogenic treatment of materials
EP0069688A2 (de) * 1981-05-29 1983-01-12 Jean-Paul Keller Verfahren zur Tiefkühlung und zur Verpackung einzelner Produkte und Vorrichtung zur Durchführung dieses Verfahrens
FR2526927A1 (fr) * 1982-05-14 1983-11-18 Anhydride Carbonique Ind Cellule de surgelation et de refroidissement
EP0170580A1 (de) * 1984-07-12 1986-02-05 Carboxyque Francaise Verfahren und Vorrichtung zur Kühlung einer Produktladung
FR2593593A1 (fr) * 1986-01-28 1987-07-31 Carboxyque Francaise Procede et appareil pour realiser dans un objet mou une cavite cylindrique

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4399658A (en) * 1978-02-08 1983-08-23 Safeway Stores, Incorporated Refrigeration system with carbon dioxide injector
US4237700A (en) * 1979-04-20 1980-12-09 Airco, Inc. Methods and apparatus for providing refrigeration
FR2530004A1 (fr) * 1982-07-07 1984-01-13 Air Liquide Dispositif de congelation de produits biologiques conditionnes en tubes, ampoules ou paillettes
US4481782A (en) * 1983-01-25 1984-11-13 The Boc Group, Inc. Methods and apparatus for refrigerating products
US4475351A (en) * 1983-08-09 1984-10-09 Air Products And Chemicals, Inc. Dual-flow cryogenic freezer
US4644754A (en) * 1984-01-11 1987-02-24 Carboxyque Francaise Process and apparatus for cooling a charge of products
FR2558337B1 (fr) * 1984-01-19 1986-05-02 Air Liquide Dispositif de congelation de produits biologiques conditionnes en paillettes

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1588664A (de) * 1967-10-13 1970-04-17
FR2019050A1 (de) * 1968-09-27 1970-06-26 Universal Oil Prod Co
US4304293A (en) * 1979-06-18 1981-12-08 Helmholtz-Institut Fur Biomedizinische Technik Process and apparatus for freezing living cells
FR2462673A1 (fr) * 1979-08-03 1981-02-13 Carboxyque Francaise Enceinte de refrigeration
CA1128329A (en) * 1981-04-24 1982-07-27 Douglas Hurst Cryogenic treatment of materials
EP0069688A2 (de) * 1981-05-29 1983-01-12 Jean-Paul Keller Verfahren zur Tiefkühlung und zur Verpackung einzelner Produkte und Vorrichtung zur Durchführung dieses Verfahrens
FR2526927A1 (fr) * 1982-05-14 1983-11-18 Anhydride Carbonique Ind Cellule de surgelation et de refroidissement
EP0170580A1 (de) * 1984-07-12 1986-02-05 Carboxyque Francaise Verfahren und Vorrichtung zur Kühlung einer Produktladung
FR2593593A1 (fr) * 1986-01-28 1987-07-31 Carboxyque Francaise Procede et appareil pour realiser dans un objet mou une cavite cylindrique

Also Published As

Publication number Publication date
AU632746B2 (en) 1993-01-14
FR2630818A1 (fr) 1989-11-03
ES2044162T3 (es) 1994-01-01
FR2630818B1 (fr) 1990-09-14
CA1332111C (fr) 1994-09-27
DE68909484T2 (de) 1994-05-11
DE68909484D1 (de) 1993-11-04
EP0341131B1 (de) 1993-09-29
AU3388889A (en) 1989-11-02
USRE33852E (en) 1992-03-24
US4878353A (en) 1989-11-07

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