EP1184633A1 - Tiefkühltunnel zur Produktkühlung insbesondere von Lebensmittelprodukten - Google Patents

Tiefkühltunnel zur Produktkühlung insbesondere von Lebensmittelprodukten Download PDF

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Publication number
EP1184633A1
EP1184633A1 EP01402227A EP01402227A EP1184633A1 EP 1184633 A1 EP1184633 A1 EP 1184633A1 EP 01402227 A EP01402227 A EP 01402227A EP 01402227 A EP01402227 A EP 01402227A EP 1184633 A1 EP1184633 A1 EP 1184633A1
Authority
EP
European Patent Office
Prior art keywords
tunnel
fan
products
rotation
blades
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.)
Withdrawn
Application number
EP01402227A
Other languages
English (en)
French (fr)
Inventor
Robert Taylor
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude, LAir Liquide SA a Directoire et Conseil de Surveillance pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1184633A1 publication Critical patent/EP1184633A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F25D13/00—Stationary devices, e.g. cold-rooms
    • F25D13/06—Stationary devices, e.g. cold-rooms with conveyors carrying articles to be cooled through the cooling space
    • F25D13/067—Stationary devices, e.g. cold-rooms with conveyors carrying articles to be cooled through the cooling space with circulation of gaseous cooling fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F9/00—Use of air currents for screening, e.g. air curtains

Definitions

  • the present invention relates to a cryogenic tunnel of refrigeration of products, in particular food.
  • Tunnels of this type generally include a carpet horizontal product conveyor and means for blowing gas cold on them and to limit the exit of cold gas from the tunnel and / or the entry outside gas in the tunnel.
  • centrifugal blowers have the disadvantage of tend to move light products on the conveyor belt. In addition, they produce fluxes localized and are difficult to clean.
  • the invention aims to equip the cryogenic tunnel with means for controlling the circulation of cold gas not having these disadvantages.
  • the cryogenic tunnel comprises at minus a fan, arranged above the carpet, the blades of which extend transversely to the mat over substantially the entire width of this latest.
  • the fan has two to six radial blades whose axis of rotation is substantially perpendicular to the longitudinal direction of advancement of the belt and parallel to the latter.
  • the fan is equipped with a small number of blades, but which extend almost across the width of the mat, and rotates at a speed adapted so as not to dissipate excessive energy on the products moving.
  • the cold gas is thus gently displaced over the entire carpet surface, with no area of strong suction or strong blowing which could cause unwanted swirls of hot or cold gas, or cause product movement on the carpet.
  • This fan creates an increased heat transfer zone thanks to the action of its fins and effectively opposes the exit of cold gas from the tunnel.
  • the single figure is a schematic perspective view of a fan placed above a conveyor belt in a cryogenic tunnel according to the invention.
  • the cryogenic tunnel partially shown in the drawing is intended for the refrigeration of products, in particular food, not represented.
  • This tunnel includes a horizontal conveyor belt 1 supporting products to be refrigerated, driven in a manner known per se by means not shown.
  • the tunnel includes two fans 2, only one of which has been shown in the drawing, arranged above the conveyor belt 1 at longitudinally spaced suitable locations, for example at opposite ends of the tunnel.
  • Each fan 2 extends transversely over substantially the entire width of the mat 1, and comprises a small number of blades or radial fins 3, namely four in the example shown. This number may vary, preferably being between two and six.
  • the axis of rotation XX of the blades 3 of the fan 2 is substantially perpendicular to the longitudinal direction F of advancement of the carpet 1 and parallel to the latter.
  • the longitudinal advancement direction F of carpet 1 being oriented to the left in the appended figure, each fan 2 rotates around the XX axis clockwise, i.e. it blows cold gas on the products placed on the belt 1 in their direction F of advancement, or co-current.
  • each fan 2 is suitably adjusted, for example by means of a variable speed drive, so that it does not generate too much energy, in particular to avoid to move light products on the belt 1.
  • This speed of rotation is adjusted so that the corresponding blowing energy is very significantly lower than that of the centrifugal blowers used in the prior art.
  • each fan 2 can be reversed.
  • the downstream fan can blow co-current while the upstream fan 2 is rotated in the opposite direction to help keep the tunnel free of any unwanted air introduction during periods of low production.
  • the speed of rotation of fans 2 can be regulated automatically, for example by means of a system temperature control at the exit of the tunnel.
  • Fans 2 can be arranged inside covers suitably mounted in the tunnel; it is also possible to conform in hollow cylindrical sector, in particular in half-cylinder, the part upper of the thermally insulating tunnel to partially house the fans including their upper half.
  • the corresponding section of the tunnel can be a thermal expansion-contraction joint.

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)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
EP01402227A 2000-09-01 2001-08-27 Tiefkühltunnel zur Produktkühlung insbesondere von Lebensmittelprodukten Withdrawn EP1184633A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0011189 2000-09-01
FR0011189A FR2813661B1 (fr) 2000-09-01 2000-09-01 Tunnel cryogenique de refrigeration de produits, notamment alimentaires

Publications (1)

Publication Number Publication Date
EP1184633A1 true EP1184633A1 (de) 2002-03-06

Family

ID=8853901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01402227A Withdrawn EP1184633A1 (de) 2000-09-01 2001-08-27 Tiefkühltunnel zur Produktkühlung insbesondere von Lebensmittelprodukten

Country Status (4)

Country Link
US (1) US6553781B2 (de)
EP (1) EP1184633A1 (de)
CA (1) CA2356335A1 (de)
FR (1) FR2813661B1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2837563B1 (fr) * 2002-03-21 2004-10-22 Air Liquide Procede et dispositif de conduite d'un tunnel cryogenique, tunnel cryogenique associe
US8439910B2 (en) * 2010-01-22 2013-05-14 Megadyne Medical Products Inc. Electrosurgical electrode with electric field concentrating flash edge

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302423A (en) * 1965-01-12 1967-02-07 Elmwood Products Inc Method and apparatus for freezing perishable material
US3533245A (en) * 1968-11-14 1970-10-13 Harold L Komberec Gas lock for openings in pressurized chambers
US3914953A (en) * 1974-05-01 1975-10-28 Air Prod & Chem Cryogenic fragmentation freezer
EP0058782A1 (de) * 1981-02-24 1982-09-01 Stichting Ontwikkeling Koeltechniek Tiefkühlgebäude
GB2168588A (en) * 1984-12-21 1986-06-25 Imp Group Plc Profiled tobacco layers
US4947654A (en) * 1989-11-30 1990-08-14 Liquid Carbonic Corporation Liquid cryogen freezer with improved vapor balance control
US5968578A (en) * 1997-12-08 1999-10-19 Knisely; Charles W. Baking system and method using oscillating baffles for heat transfer enhancement
WO2000026586A1 (en) * 1998-10-30 2000-05-11 Daewoo Electronics Co., Ltd. Air curtain generator for refrigerator

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353719A (en) * 1992-12-09 1994-10-11 Eshleman Roger D Apparatus and method for controlled processing of materials
US5567151A (en) * 1994-10-21 1996-10-22 Senju Metal Industry Company Limited Reflow furnaces with hot air blow type heaters
US5956228A (en) * 1997-09-22 1999-09-21 National Railroad Passenger Corporation Electrical equipment case

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3302423A (en) * 1965-01-12 1967-02-07 Elmwood Products Inc Method and apparatus for freezing perishable material
US3533245A (en) * 1968-11-14 1970-10-13 Harold L Komberec Gas lock for openings in pressurized chambers
US3914953A (en) * 1974-05-01 1975-10-28 Air Prod & Chem Cryogenic fragmentation freezer
EP0058782A1 (de) * 1981-02-24 1982-09-01 Stichting Ontwikkeling Koeltechniek Tiefkühlgebäude
GB2168588A (en) * 1984-12-21 1986-06-25 Imp Group Plc Profiled tobacco layers
US4947654A (en) * 1989-11-30 1990-08-14 Liquid Carbonic Corporation Liquid cryogen freezer with improved vapor balance control
US5968578A (en) * 1997-12-08 1999-10-19 Knisely; Charles W. Baking system and method using oscillating baffles for heat transfer enhancement
WO2000026586A1 (en) * 1998-10-30 2000-05-11 Daewoo Electronics Co., Ltd. Air curtain generator for refrigerator

Also Published As

Publication number Publication date
CA2356335A1 (fr) 2002-03-01
FR2813661B1 (fr) 2002-12-13
US6553781B2 (en) 2003-04-29
US20020029582A1 (en) 2002-03-14
FR2813661A1 (fr) 2002-03-08

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