EP0250318A1 - Kälteverfahren und -tunnel - Google Patents

Kälteverfahren und -tunnel Download PDF

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Publication number
EP0250318A1
EP0250318A1 EP87401357A EP87401357A EP0250318A1 EP 0250318 A1 EP0250318 A1 EP 0250318A1 EP 87401357 A EP87401357 A EP 87401357A EP 87401357 A EP87401357 A EP 87401357A EP 0250318 A1 EP0250318 A1 EP 0250318A1
Authority
EP
European Patent Office
Prior art keywords
tunnel
compartment
gases
liquid
hand
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
EP87401357A
Other languages
English (en)
French (fr)
Other versions
EP0250318B1 (de
Inventor
Jean Compagnon
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 Te Puteaux Frankrijk
Original Assignee
Carboxyque Francaise SA
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 Carboxyque Francaise SA filed Critical Carboxyque Francaise SA
Priority to AT87401357T priority Critical patent/ATE94632T1/de
Publication of EP0250318A1 publication Critical patent/EP0250318A1/de
Application granted granted Critical
Publication of EP0250318B1 publication Critical patent/EP0250318B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25D3/11—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air with conveyors carrying articles to be cooled through the cooling space

Definitions

  • the present invention relates to a process and a tunnel for cooling a product by means of a cryogenic liquid.
  • product is meant either an object of great length such as a pipe, or a succession of objects of small dimensions.
  • the invention relates firstly to a method of cooling a product by injecting a cryogenic liquid into a tunnel transversely traversed by said product, of the type in which the tunnel is divided into two compartments which communicate with each other at the ends of the tunnel , the product is passed through a first compartment, the cryogenic liquid is injected into the second compartment, and a forced circulation of the gases resulting from the vaporization of the liquid is created between the two compartments by passing these gases from a compartment to the other on the one hand at the two ends of the tunnel, on the other hand at an intermediate location of the length of the tunnel, in particular at the mid-length thereof.
  • the invention applies in particular to the following cases: - modification of the mechanical properties of a product, for example hardening of rubber hoses with a view to installing an external metal braid, hardening of sheets or rods of rubber or plastic to obtain a clean cut , hardening of extruded products such as confectionery or cheese, etc ... - acceleration of the cooling of products to avoid their storage and to allow a continuous manufacturing, for example cooling of cookies out of oven for continuous packaging, sub-cooling of ice creams before hot coating, fast setting of jellies in cold cuts , etc ...
  • Document EP-A-24 159 describes a process of the type indicated above, in which a central fan passes the gases from the first compartment to the second, the gases returning to the first compartment through the ends of the tunnel.
  • the invention therefore aims to provide a method and an apparatus for cooling objects, which may be discrete or very long, quickly, continuously and at precise temperatures, with good thermal efficiency.
  • the invention relates to a process of the aforementioned type, characterized in that said forced circulation is ensured by blowing said gases from the second compartment to the first compartment at said intermediate location.
  • cryogenic liquid is injected from one end of the tunnel; - the injection of cryogenic liquid is regulated by measuring the temperature of the gases at a point in the tunnel where this liquid is entirely vaporized;
  • the invention also relates to a cooling tunnel for a product intended for the implementation of the process thus defined.
  • This tunnel of the type comprising a partition which divides it into two compartments communicating with each other on the one hand at the two ends of the tunnel, on the other hand in an intermediate location, in particular in the length of the tunnel, means for longitudinally moving the product to cool through a first compartment, means for injecting a cryogenic liquid opening into the other compartment, as well as circulation means for passing the gases resulting from the vaporization of the liquid from the second compartment to the first compartment on the one hand at both ends of the tunnel, on the other hand at said intermediate location, is characterized in that said circulation means are arranged to blow said gases from the second compartment to the first compartment at said intermediate location.
  • the tunnel shown in FIGS. 1 and 2 comprises a thermally insulated outer box 1 of generally very elongated parallelepiped shape and with a horizontal longitudinal axis.
  • This tunnel comprises in an end wall (on the right in FIG. 1) an inlet window 2 and, in the opposite end wall, an outlet window 3.
  • Each window is fitted with a flexible curtain (not shown) intended to minimize air entry into the tunnel.
  • a conveyor 4 constituted by an openwork endless belt, passes over two deflection pulleys 5, 6, one of which is driven, situated respectively a little upstream of the window 2 and a little downstream of the window 3.
  • the upper strand of this conveyor passes longitudinally through the box 1.
  • the tunnel is equipped with a horizontal partition 7.
  • This partition extends transversely over the entire width of the box and is connected to the walls side of it. By cons, in the longitudinal direction, it ends at a certain distance from the two end walls of the box.
  • the partition 7 consists of a double sheet, so as to have a significant thickness. At each end, this partition is profiled: its lower face is inclined upwards then rounded to connect to its upper face. About halfway along the length of the box, the partition 7 has a circular opening 8 defined by a ferrule. In this opening is arranged a propeller 9 of axial flow fan, suspended from a vertical axis 10 which crosses the ceiling of the box 1. On this ceiling is fixed an electric motor 11 for driving the axis 10. A deflector 12, consisting of a sheet metal arcuate longitudinally and extending laterally to the side walls of the box, is arranged under the propeller 9.
  • the partition 7 divides the interior space of the box 1 into two compartments: a first lower compartment 13 traversed longitudinally by the upper strand of the conveyor 4 and containing the deflector 12, and a second upper compartment 14, these two compartments communicating with each other on the one hand at each end of the tunnel, on the other hand through the opening 8.
  • a temperature probe 15 projects into the upper compartment 14, on the side of the outlet 3 of the tunnel, through the ceiling of the box.
  • a capillary tube 16 enters the same compartment 14 near the entrance 2 of the tunnel. This capillary crosses the ceiling of the box then curves to open horizontally in the compartment 14 in the direction of the axis 10 of the fan. To speed up the exchange of heat, the capillary 16 opens at the inlet of a longitudinally oriented venturi 17.
  • the upstream end of the capillary 16 is connected to a source 18 of liquid carbon dioxide at -20 ° C, 20 bars by a pipe 19 fitted with a solenoid valve 20.
  • the latter is controlled in whole or nothing by a temperature regulator-indicator 21 as a function of the information provided by the temperature probe 15.
  • the product to be cooled passes through the entire length of the tunnel on the upper strand of the conveyor 4, from the inlet 2 to the outlet 3 passing under the defector 12.
  • the propeller 9 is rotated, and liquid CO2 is expanded through the capillary 16 and forms at the outlet thereof, in the upper compartment 14, carbon dioxide snow which sublimes .
  • the dimensioning and the adjustment are such that the carbon dioxide snow sublimes before reaching the mid-length of the tunnel and being deposited on the walls of this one or on the partition 7.
  • there is no solid CO2 particle that is to say that the propeller 9 passes from compartment 14 to lower compartment 13 an exclusively gaseous flow.
  • This gas flow is deflected by the deflector 12 towards the two ends of the tunnel and, as all the supply of cold passes through the fan, the temperature of the gases sent in both directions into the compartment 13 is very uniform. At each end, the gases go back up into the compartment 14 to be recycled, this movement being favored by the profiling of the ends of the partition 7.
  • the probe 15 and the regulator 21 regulate the injection of liquid CO2 into the tunnel so as to maintain at a precise value the temperature of the gases circulating in the tunnel, this value being adjustable between 0 and -65 ° C, to within ⁇ 1 ° C.
  • the objects 22 are first subjected to a counter-current cooling, up to the deflector 12, then a co-current cooling.
  • This has the advantage of ensuring uniform cooling of the front and rear parts of the objects 22, in particular when the latter are relatively high.
  • a portion of the cold gases passes through the conveyor 4, which also ensures the cooling of the underside of these objects.
  • the cross section of the cold gases is reduced, and therefore the speed of circulation of these gases is increased, which promotes cooling efficiency.
  • cryogenic liquid other than CO2 may be used, for example liquid nitrogen, to ensure the supply of cold into the tunnel.

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)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Manufacturing And Processing Devices For Dough (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
EP87401357A 1986-06-18 1987-06-17 Kälteverfahren und -tunnel Expired - Lifetime EP0250318B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87401357T ATE94632T1 (de) 1986-06-18 1987-06-17 Kaelteverfahren und -tunnel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8608774 1986-06-18
FR8608774A FR2600406B1 (fr) 1986-06-18 1986-06-18 Procede et tunnel de refroidissement

Publications (2)

Publication Number Publication Date
EP0250318A1 true EP0250318A1 (de) 1987-12-23
EP0250318B1 EP0250318B1 (de) 1993-09-15

Family

ID=9336435

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87401357A Expired - Lifetime EP0250318B1 (de) 1986-06-18 1987-06-17 Kälteverfahren und -tunnel

Country Status (8)

Country Link
US (1) US4757691A (de)
EP (1) EP0250318B1 (de)
AT (1) ATE94632T1 (de)
AU (1) AU588199B2 (de)
CA (1) CA1298714C (de)
DE (1) DE3787406T2 (de)
ES (1) ES2043677T3 (de)
FR (1) FR2600406B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8535122B2 (en) 2009-06-10 2013-09-17 Foodmate B.V. Method and apparatus for automatic meat processing
EP2733447A1 (de) * 2012-11-15 2014-05-21 Linde Aktiengesellschaft Gefriertruhe mit oszillierendem Fluss
CN112639365A (zh) * 2018-09-03 2021-04-09 大金工业株式会社 换气控制装置以及换气系统

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2600406B1 (fr) * 1986-06-18 1988-08-05 Air Liquide Procede et tunnel de refroidissement
FR2620804B1 (fr) * 1987-09-21 1990-02-16 Air Liquide Procede de refroidissement en continu d'un produit extrude et installation pour sa mise en oeuvre
US4912943A (en) * 1988-12-14 1990-04-03 Liquid Air Corporation Method and apparatus for enhancing production capacity and flexibility of a multi-tier refrigeration tunnel
US4955209A (en) * 1989-11-01 1990-09-11 Cryo-Chem Inc. Cryogenic bath freezer with pivoted conveyor belt
US4947654A (en) * 1989-11-30 1990-08-14 Liquid Carbonic Corporation Liquid cryogen freezer with improved vapor balance control
CA2100486A1 (en) * 1992-07-13 1994-01-14 Paul Antoine Coffre Freezing tunnel
US5444985A (en) * 1994-05-13 1995-08-29 Liquid Carbonic Corporation Cryogenic tunnel freezer
US5577392A (en) * 1995-01-17 1996-11-26 Liquid Carbonic Corporation Cryogenic chiller with vortical flow
ZA962924B (en) * 1995-05-24 1996-10-25 Pillsbury Co System for producing a filled rolled dough product
US5606861A (en) * 1995-06-07 1997-03-04 Air Liquide America Corporation Crossflow cryogenic freezer and method of use
US5921091A (en) * 1996-10-09 1999-07-13 American Air Liquide, Incorporated Liquid air food freezer and method
US5765381A (en) * 1997-03-04 1998-06-16 Air Liquide America Corporation Multitier crossflow cryogenic freezer and method of use
DE19917778C1 (de) * 1999-04-20 2000-09-21 Sollich Kg Verfahren und Vorrichtung zum Kühlen von Warenstücken, insbesondere von mit Schokolademasse überzogenen Süßwaren
US6363730B1 (en) * 2000-03-15 2002-04-02 The Conair Group, Inc. Method and apparatus for cryogenic cooling
US6389828B1 (en) * 2000-03-15 2002-05-21 Michael R. Thomas Cryogenic cooling chamber apparatus and method
US6311509B1 (en) 2000-12-22 2001-11-06 Premark Feg L.L.C. Chiller with automatic probe detection and filtered temperature display
US6550259B2 (en) 2000-12-22 2003-04-22 Premark Feg L.L.C. Chiller control system
US8333087B2 (en) 2007-08-13 2012-12-18 Linde, Inc. Cross-flow spiral heat transfer system
US20100319365A1 (en) * 2007-11-27 2010-12-23 Newman Michael D Cross flow tunnel freezer system
PL2241202T3 (pl) * 2009-04-15 2013-07-31 Messer Group Gmbh Urządzenie i sposób chłodzenia lub zamrażania produktów wydłużonych
US20160265835A1 (en) * 2015-03-09 2016-09-15 John Brothers Cryogenic freezer
EP3333521A1 (de) * 2016-12-06 2018-06-13 Linde Aktiengesellschaft Vorrichtung und verfahren zur verringerung der temperatur von produkten
JP6963248B2 (ja) * 2017-02-15 2021-11-05 株式会社クールテクノス 食品冷却装置
CN111972478B (zh) * 2020-09-01 2023-01-24 极速(广东)冷链设备有限公司 一种家禽隧道式速冻机

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL103387B (de) * 1941-10-28 1946-02-15
FR1575286A (de) * 1968-07-31 1969-07-18
GB1283073A (en) * 1969-05-22 1972-07-26 George Meagher Improvements in or relating to cooling tunnels
EP0024159A2 (de) * 1979-08-06 1981-02-25 Air Products And Chemicals, Inc. Tiefgefrieranlage

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1086833B (de) * 1958-03-12 1960-08-11 Hoechst Ag Verfahren zur Herstellung von wasserunloeslichen Azofarbstoffen
US3345828A (en) * 1965-06-11 1967-10-10 Air Prod & Chem Parallel flow cryogenic freezer
US3403527A (en) * 1967-06-01 1968-10-01 Air Prod & Chem Transverse-parallel flow cryogenic freezer
US3600901A (en) * 1969-03-17 1971-08-24 Integral Process Syst Inc Gas balance control in flash freezing systems
US3892104A (en) * 1973-09-20 1975-07-01 David J Klee Cryogenic freezer with variable speed gas control system
SE8206627L (sv) * 1982-11-22 1984-05-23 Sture Astrom Frystunnel
FR2600406B1 (fr) * 1986-06-18 1988-08-05 Air Liquide Procede et tunnel de refroidissement

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL103387B (de) * 1941-10-28 1946-02-15
FR1575286A (de) * 1968-07-31 1969-07-18
GB1283073A (en) * 1969-05-22 1972-07-26 George Meagher Improvements in or relating to cooling tunnels
EP0024159A2 (de) * 1979-08-06 1981-02-25 Air Products And Chemicals, Inc. Tiefgefrieranlage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8535122B2 (en) 2009-06-10 2013-09-17 Foodmate B.V. Method and apparatus for automatic meat processing
EP2733447A1 (de) * 2012-11-15 2014-05-21 Linde Aktiengesellschaft Gefriertruhe mit oszillierendem Fluss
CN112639365A (zh) * 2018-09-03 2021-04-09 大金工业株式会社 换气控制装置以及换气系统
CN112639365B (zh) * 2018-09-03 2023-08-01 大金工业株式会社 换气控制装置以及换气系统

Also Published As

Publication number Publication date
EP0250318B1 (de) 1993-09-15
DE3787406T2 (de) 1994-01-13
CA1298714C (fr) 1992-04-14
FR2600406B1 (fr) 1988-08-05
ES2043677T3 (es) 1994-01-01
US4757691A (en) 1988-07-19
DE3787406D1 (de) 1993-10-21
AU7442487A (en) 1987-12-24
AU588199B2 (en) 1989-09-07
FR2600406A1 (fr) 1987-12-24
ATE94632T1 (de) 1993-10-15

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