WO2007012636A1 - Dispositif et procede de refroidissement de la surface d'objets - Google Patents

Dispositif et procede de refroidissement de la surface d'objets Download PDF

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Publication number
WO2007012636A1
WO2007012636A1 PCT/EP2006/064608 EP2006064608W WO2007012636A1 WO 2007012636 A1 WO2007012636 A1 WO 2007012636A1 EP 2006064608 W EP2006064608 W EP 2006064608W WO 2007012636 A1 WO2007012636 A1 WO 2007012636A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon dioxide
snow
diffuser
product
gas
Prior art date
Application number
PCT/EP2006/064608
Other languages
German (de)
English (en)
Inventor
Peter De Cneudt
Original Assignee
Messer Group Gmbh
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 Messer Group Gmbh filed Critical Messer Group Gmbh
Priority to EP06777943A priority Critical patent/EP1910753A1/fr
Publication of WO2007012636A1 publication Critical patent/WO2007012636A1/fr

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
    • 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

Definitions

  • the invention relates to a device for surface cooling of objects, in particular for the surface cooling of food or pharmaceutical products, with a connectable to a carbon dioxide expansion nozzle and with a working with the expansion nozzle snow horn for applying carbon dioxide snow on a product.
  • the invention further relates to a method for surface cooling of articles.
  • cooling tunnels are used for cooling foods in which the packaged food during a period of several hours through a cold atmosphere, for example - 2O 0 C to - 30 ° C are performed. It is also known that the surface of the product is supplied with a strong stream of cold gas or carbon dioxide particles from a snow tube ("crust-freezing").
  • the object of the invention is therefore to provide a device for rapid cooling of objects, in particular food or pharmaceutical products with carbon dioxide particles, which allows a uniform product cooling.
  • This object is achieved in a device of the type mentioned by a diffuser to reduce the flow velocity of the generated at the expansion device stream of carbon dioxide gas and carbon dioxide snow.
  • any object is understood by the flow rate of the stream of carbon dioxide gas and carbon dioxide snow can be reduced.
  • the diffuser may be fluidly downstream of the snow tube and / or directly downstream of the expansion nozzle. While due to the high flow rate in conventional snow horns a highly turbulent gas flow occurs at the mouth of the snow horn, which leads to an uneven distribution of carbon dioxide snow on the product, falls in the inventive device of the entrained in the gas stream carbon dioxide snow very evenly on the product. Thus, the distribution of carbon dioxide on the product can be very well controlled and adapted to the requirements.
  • the diffuser is in the form of a cylindrical or conical tube and has a gas-permeable wall.
  • the wall is preferably provided with openings which are dimensioned so that carbon dioxide gas, but no carbon dioxide snow, can escape through the wall openings. The mass flow of carbon dioxide gas is thus reduced and the flow rate of the carbon dioxide snow is reduced.
  • the cross-sectional opening of the diffuser is adapted to the surface to be snowed with carbon dioxide snow. In this way, a particularly economical use of the device according to the invention is achieved.
  • the object of the invention is also achieved by a method having the features mentioned in claim 4.
  • the flow rate of the stream of carbon dioxide gas and carbon dioxide snow after it exits the snow tube is reduced in a diffuser.
  • the flow rate is reduced such that the carbon dioxide snow falls at the outlet of the diffuser substantially only under the action of gravity on the product to be cooled.
  • FIG. 1 shows schematically a device according to the invention for surface cooling of objects.
  • the device 1 for surface cooling of objects, in particular of food or medicaments comprises a snow horn 2, in the upper region of which a relaxation nozzle 3 is mounted.
  • the expansion nozzle 3 is connected via a feed line 4 to a source 5 for liquid carbon dioxide, for example a stationary tank or a compressed gas cylinder.
  • the supply of liquid carbon dioxide can be regulated by means of a valve 6 which is in communication with a control unit 7.
  • the snow horn 2 which is preferably made of stainless steel, has, starting from the expansion nozzle 3, a conically widening section 8 and a cylindrical front section 9 which ends in an outlet opening 10.
  • a diffuser 1 1 is arranged before the mouth opening 10 of the snow horn 2, a diffuser 1 1 is arranged.
  • the diffuser 1 1 is formed as a cylindrical tube extending on the one hand adjoins the mouth opening 10 of the snow horn 2 and on the other hand terminates in an outflow opening 13.
  • the diffuser 1 1 has a gas-permeable wall 12.
  • the gas permeability of the wall 12 is effected for example by a wire mesh or a perforation.
  • the wall 12 is made of stainless steel or another, in the cold embrittling material.
  • the outflow opening 13 has a cross-sectional area which is adapted to the area to be snow-covered, that is to say a product 15 or the packaging of a product.
  • the length of the diffuser 1 1 is dimensioned such that on the one hand, the cooling result is not affected by a freezing of the gas-permeable openings in the wall 12 due to the cold of the guided through the diffuser 1 1 cold gas flow and on the other hand, the flow velocity of the diffuser 1 1 passed gas stream, as described in more detail below, is sufficiently reduced.
  • the size of the reduction of the flow velocity in the diffuser 11 depends on the respective task and can be influenced by the geometry of the diffuser 1 1 and by the structure of the porous wall targeted.
  • liquid cooling dioxide from the source 5 is supplied via the supply line 4 and relaxed at the expansion nozzle 3, where it passes partly into the gaseous, partly in the solid state.
  • the result is a strong flow of carbon dioxide gas and carbon dioxide snow, which flows at high flow rate through the mouth opening 10 of the snow horn 2 in the diffuser 11.
  • a portion of the carbon dioxide gas flows through the openings of the gas-permeable wall 12 from. This reduces the flow velocity of the residual flow remaining in the diffuser.
  • the flow velocity is greatly reduced, for example in such a way that the carbon dioxide snow falls substantially only due to gravity down on the products to be cooled 15.
  • the products 15 to be cooled are moved on a treadmill 16, which is driven by a motor 17, in the direction indicated by an arrow.
  • a motor 17 which is driven by a motor 17, in the direction indicated by an arrow.
  • the snow horn 2 is movably received on a horizontal arm, not shown here and can not by means of one here shown motor perpendicular to the direction of movement of the products 15 are moved. Both motors are also in data communication with the control unit 7, so that the movements of the treadmill 16 and the snow horn 2 can be coordinated with the supply of carbon dioxide. In this way it is possible to snow a plurality of adjacent rows of products 15 very precisely with the desired amount of carbon dioxide snow.
  • the device 1 enables targeted and uniform snowmaking of the products 15 with carbon dioxide snow. Compared to conventional snowmaking snowmaking, the device 1 operates very efficiently and leads to a much more uniform cooling of the product surface.
  • the device according to the invention is suitable for surface cooling of a large number of products from different fields, such as food for humans and animals, pharmaceuticals, biological, in particular microbiological, or chemical products.

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)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

Selon un procédé classique de refroidissement de surface, on utilise un cornet de projection de neige qui est relié à une buse de détente destinée à la détendre du dioxyde de carbone liquide. Lors de la détente du dioxyde de carbone liquide, il se forme un fort courant de gaz de dioxyde de carbone mélangé à de la neige de dioxyde de carbone, ce courant étant projeté par le cornet de neige sur le produit à refroidir. La neige de dioxyde de carbone reste en partie sur le produit. Ce procédé a l'inconvénient que les turbulences, générées lors de la projection du courant, empêchent une application uniforme de la neige de dioxyde de carbone sur le produit. Pour y remédier, l'invention préconise de monter, en aval du cornet à neige, un diffuseur qui réduise la vitesse d'écoulement du courant composé de gaz de dioxyde de carbone et de neige de dioxyde de carbone jusqu'à une certaine valeur pour laquelle la neige de dioxyde de carbone tombe uniformément sur le produit. Quant au diffuseur, il s'agit par exemple d'un tuyau équipé de parois perméables au gaz et de géométrie cylindrique ou conique. L'utilisation du dispositif selon l'invention permet de supprimer efficacement l'apparition de turbulences.
PCT/EP2006/064608 2005-07-27 2006-07-25 Dispositif et procede de refroidissement de la surface d'objets WO2007012636A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06777943A EP1910753A1 (fr) 2005-07-27 2006-07-25 Dispositif et procede de refroidissement de la surface d'objets

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510035041 DE102005035041A1 (de) 2005-07-27 2005-07-27 Vorrichtung und Verfahren zur Oberflächenkühlung von Gegenständen
DE102005035041.0 2005-07-27

Publications (1)

Publication Number Publication Date
WO2007012636A1 true WO2007012636A1 (fr) 2007-02-01

Family

ID=37074144

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2006/064608 WO2007012636A1 (fr) 2005-07-27 2006-07-25 Dispositif et procede de refroidissement de la surface d'objets

Country Status (3)

Country Link
EP (1) EP1910753A1 (fr)
DE (1) DE102005035041A1 (fr)
WO (1) WO2007012636A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108885043A (zh) * 2016-03-26 2018-11-23 梅塞尔法国股份公司 用于计量二氧化碳雪的设备
DE102021002056A1 (de) 2021-04-20 2022-10-20 Messer Se & Co. Kgaa Vorrichtung zum Dosieren von Kohlendioxidschnee

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016003800A1 (de) * 2016-03-26 2017-09-28 Messer France S.A.S. Vorrichtung zum Dosieren von Kohlendioxidschnee

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421753A (en) * 1942-02-18 1947-06-10 American Optical Corp Means for unblocking lenses
US3254506A (en) * 1964-03-02 1966-06-07 Johnson Co Gordon Carbon dioxide freezing apparatus and method
US4652287A (en) * 1984-08-23 1987-03-24 The Boc Group, Inc. Apparatus for forming solid carbon dioxide
JPH06257938A (ja) * 1993-03-02 1994-09-16 Nippon Sanso Kk スノー状ドライアイスの製造器
JPH06257937A (ja) * 1993-03-02 1994-09-16 Nippon Sanso Kk スノー状ドライアイスの製造器
GB2281775A (en) * 1993-09-09 1995-03-15 Mg Gas Products Ltd Food cooling system using carbon dioxide snow
DE19852185A1 (de) * 1998-08-04 2000-02-10 Mg Chorzow Spolka Z O O Trockenschneekanone
JP3166958B2 (ja) * 1994-02-07 2001-05-14 昭和炭酸株式会社 スノードライの充填方法およびスノードライの充填装置
JP2003201109A (ja) * 2001-12-28 2003-07-15 Kakubayashi Shoji Kk ドライアイス生成方法と装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2253193A1 (en) * 1973-12-03 1975-06-27 Air Liquide Refrigeration of prods partic food prods - using carbon dioxide snow
DE3833753A1 (de) * 1988-03-31 1989-08-03 Edwin Schmidt Verfahren und vorrichtungen zum tiefkuehlen von kohlendioxidgasfoermig und stickstoff-gasfoermig aus druckbehaeltern, beziehungsweise luft aus druckflaschen oder -erzeugern und deren tiefkalte anwendung
DE19716844C1 (de) * 1997-04-22 1998-12-10 Gct Gase Und Cryo Technik Gmbh Vorrichtung zur Erzeugung von Kohlensäureschnee
DE10045869A1 (de) * 2000-09-14 2002-03-28 Tv Kohlensaeure Technik & Vert Vorrichtung und Verfahren zur Erzeugung von Kohlendioxidschnee

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2421753A (en) * 1942-02-18 1947-06-10 American Optical Corp Means for unblocking lenses
US3254506A (en) * 1964-03-02 1966-06-07 Johnson Co Gordon Carbon dioxide freezing apparatus and method
US4652287A (en) * 1984-08-23 1987-03-24 The Boc Group, Inc. Apparatus for forming solid carbon dioxide
JPH06257938A (ja) * 1993-03-02 1994-09-16 Nippon Sanso Kk スノー状ドライアイスの製造器
JPH06257937A (ja) * 1993-03-02 1994-09-16 Nippon Sanso Kk スノー状ドライアイスの製造器
GB2281775A (en) * 1993-09-09 1995-03-15 Mg Gas Products Ltd Food cooling system using carbon dioxide snow
JP3166958B2 (ja) * 1994-02-07 2001-05-14 昭和炭酸株式会社 スノードライの充填方法およびスノードライの充填装置
DE19852185A1 (de) * 1998-08-04 2000-02-10 Mg Chorzow Spolka Z O O Trockenschneekanone
JP2003201109A (ja) * 2001-12-28 2003-07-15 Kakubayashi Shoji Kk ドライアイス生成方法と装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108885043A (zh) * 2016-03-26 2018-11-23 梅塞尔法国股份公司 用于计量二氧化碳雪的设备
CN108885043B (zh) * 2016-03-26 2020-09-29 梅塞尔法国股份公司 用于计量二氧化碳雪的设备
DE102021002056A1 (de) 2021-04-20 2022-10-20 Messer Se & Co. Kgaa Vorrichtung zum Dosieren von Kohlendioxidschnee
EP4086543A1 (fr) 2021-04-20 2022-11-09 Messer SE & Co. KGaA Dispositif de dosage de neige carbonique
DE102021002056B4 (de) 2021-04-20 2023-02-23 Messer Se & Co. Kgaa Vorrichtung zum Dosieren von Kohlendioxidschnee

Also Published As

Publication number Publication date
DE102005035041A1 (de) 2007-02-01
EP1910753A1 (fr) 2008-04-16

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