EP1866582A1 - Congelateur par injection - Google Patents

Congelateur par injection

Info

Publication number
EP1866582A1
EP1866582A1 EP06706098A EP06706098A EP1866582A1 EP 1866582 A1 EP1866582 A1 EP 1866582A1 EP 06706098 A EP06706098 A EP 06706098A EP 06706098 A EP06706098 A EP 06706098A EP 1866582 A1 EP1866582 A1 EP 1866582A1
Authority
EP
European Patent Office
Prior art keywords
gas
conveyor belt
pressure chamber
impingement
perforated
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Withdrawn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
EP06706098A
Other languages
German (de)
English (en)
Inventor
Erik Benned Petersen
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.)
Marel Salmon AS
Original Assignee
Carnitech AS
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 Carnitech AS filed Critical Carnitech AS
Publication of EP1866582A1 publication Critical patent/EP1866582A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • 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
    • F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
    • F25D2400/30—Quick freezing

Definitions

  • the present invention relates to an impingement freezer comprising an outer housing having side walls, ceiling and floor, where the outer housing comprises gas condition means, preferably for cooling gas and encloses a high-pressure chamber formed by one or more ventilators for circulating the gas, and side panels and a perforated plate, where the high-pressure chamber is positioned so that the perforated plate is facing a conveyor belt for transporting products allowing the gas to be impinged through the perforated plate onto the conveyor belt, which is arranged in a zone between the perfo- rated plate and a plate member, and where the side walls and the side panels provide a return access channel for the circulated gas and that the zone is provided with at least one open side, which is open towards the return access channel.
  • gas condition means preferably for cooling gas and encloses a high-pressure chamber formed by one or more ventilators for circulating the gas, and side panels and a perforated plate
  • the high-pressure chamber is positioned so that the perforated plate is facing a conveyor belt
  • Impingement freezers are provided to quickly freeze products. By the use of impingement freezers products are placed on a conveyor belt running either below or above a perforated plate where through cooled gas is impinged onto the products causing the products to freeze or cool down.
  • US 4,584,849 describes a food freezing tunnel where the conveyor belt is positioned above a high pressure chamber and the products are impinged from below.
  • the conveyor belt is arranged inside a tunnel and the gas returns to a return access channel through an overhead structure.
  • EP-Bl-1143814 describes an apparatus for gas treatment of products where the conveyor belt is positioned below a high pressure chamber, and the products are impinged from above and below.
  • the conveyor belt is arranged inside a tunnel, and the gas returns to a return access channel through end openings of channels in the bottom construction.
  • the drawback of the aforementioned apparatus is that the conveyor belt is arranged inside a tunnel, which provides high pressure resistance because the gas cannot easily escape the tunnel, and furthermore the impingement of gas causes high pressure on the conveyor belt. Both decreases the efficiency of the impingement freezer, because the ventilator must be dimensioned to overcome the pressure resistance and the conveyor must be dimensioned to overcome the impingement pressure. As a result the im- pingement freezer as described has a large energy consumption and low capacity.
  • an impingement freezer as described in claim 1 and wherein an impingement freezer comprises an outer housing having side walls, ceiling and floor, where the outer housing comprises gas condition means, preferably for cooling gas and encloses a high-pressure chamber formed by one or more ventilators for circulating the gas, and side panels and a perforated plate, where the high-pressure chamber is positioned so that the perforated plate is facing a conveyor belt for transporting products allowing the gas to be impinged through the perforated plate onto the conveyor belt, which is arranged in a zone between the perforated plate and a plate member, and where the side walls and the side panels provide a return access channel for the circulated gas and that the zone is provided with at least one open side, which is open towards the return access channel.
  • the impingement freezer comprises an outer housing having side walls, ceiling and floor, whereby a preferably gas tight room is provided, which is necessary for efficient circulation of the gas.
  • the floor can be a part of the floor in the room wherein the impingement freezer is positioned or can be a separate floor, hence it is possible to position the impingement freezer on e.g. a landing, a deck or on supports or as a hanging unit.
  • the outer housing comprises gas condition means, preferably for cooling gas, which gas is used for freezing or cooling products.
  • gas condition means can be e.g. an evaporator, a heat exchanger, pizo-electrical elements, cooling fins or the like.
  • the gas condition means are arranged inside the outer housing so that the circulated gas passes through it at least once whenever the circulated gas is impinged onto the product. Hence the gas condition means are arranged in or at the end of the return access channel.
  • the gas can be air, nitrogen, carbon oxide or the like.
  • the only parameter is that the product is able to cope with the gas and does not become contaminated by the gas.
  • the outer housing encloses a high-pressure chamber formed by one or more ventilators, side panels and a perforated plate.
  • the ventilators cause a positive pressure in the high-pressure chamber thus causing the gas to be circulated inside the impingement freezer.
  • the high-pressure chamber is positioned so that the perforated plate is facing a conveyor belt for transporting products allowing the gas to be impinged through the perforated plate onto the conveyor belt.
  • the conveyor belt is arranged in a zone between the perforated plate and a plate member and extends through the length of the outer housing, e.g. with a first end part outside the outer housing for placing products on the conveyor belt and with a second end part outside the outer housing allowing the removal of the treated products.
  • the conveyor belt is very open such that the gas may easily pass through the conveyor belt.
  • the side walls of the outer housing and the side panels of the high-pressure chamber provide a return access channel for the circulated gas on at least one side of the conveyor belt.
  • the circulated gas is returned into the high-pressure chamber after having passed the gas condition means.
  • the zone is provided with at least one open side, which is open towards the return access channel.
  • the impinged circulated gas is able to quickly exit the zone through the return access channel, and it is possible to circulate more gas around each product on the conveyor belt thus increasing the impingement effect.
  • One advantage is that the side, which is open towards the return access channel, reduces the back-pressure in the zone containing the conveyor belt, thus it is possible for the ventilators to circulate the necessary amount of gas with reduced energy consumption.
  • One further advantage is that a part of the circulated gas flows on the plate member in a direction perpendicular to the direction of the conveyor belt, hence helping to treat the products.
  • the high-pressure chamber is positioned above the conveyor belt, and the plate member is part of a bottom construction positioned below the conveyor belt.
  • an access for the circulated gas is provided from the high-pressure chamber to the bottom construction.
  • This construction is preferred as the products typically are positioned on the upper side of the conveyor belt, and the main impingement occurs from above through the perforated plate, where the circulated gas is in direct contact with the products, and the secondary impingement occurs from below through the plate member, where the circu- lated gas bypasses, the conveyor belt to get in contact with the products.
  • the plate member is provided with perforated channels and non-perforated channels, which are arranged preferably perpendicular to the travelling direction of the conveyor belt, and where the perforated channels have at least one access for gas from the high-pressure chamber.
  • the construction of the plate member with perforated channels and adjacent non- perforated channels allows the circulated gas to circulate through the perforated channels and impinge the products on the conveyer belt and then to escape through the non-perforated channels to the return access channel.
  • the non-perforated channels ensure that a large part of the circulated gas having impinged the products on the conveyor belt and which contains absorbed heat, is led directly into the return access channel without defrosting the products lying near the outer side of the conveyor belt.
  • the plate member is replaceable, and the non- perforated channels constitute between 20-70% of the plate member.
  • the perforated channels are formed with at least one inclined bottom part. The inclined bottom part causes the channel to have a height increasing from the point of gas access towards the return access channel. Hence, the back-pressure in the perforated channels decreases throughout the length of the perforated channels, and the circulating gas has a uniform flow from the perforated channels of the plate member into the adjacently arranged non-perforated channels whatever position along the channels.
  • the impingement freezer is built with multiple conveyor belts, where the high-pressure chamber extends above a number of the conveyer belts, and where the access for gas from the high-pressure chamber to the bottom construction is arranged between the conveyer belts.
  • the impingement freezer is built having two conveyor belts arranged sym- metrically inside the outer housing so that the access for gas from the high-pressure chamber to the bottom construction is arranged in the centerline of the outer housing and between the two conveyer belts.
  • the circulated gas is led through the gas condition means into the high-pressure chamber and causes impingement on each conveyor belt from above through the perforated plate and from below through the plate member of the bottom construction.
  • the gas on both sides of the impingement freezer leaves the zone containing a conveyor belt through the channels in the plate member and the open side into the return access channel.
  • the high- pressure chamber is provided with side panels, which can be opened wholly or partly.
  • the perforated plate is pivotally hinged. Hence, it is possible to get access to the conveyor belt from above.
  • the outer _ _ housing ib piuvidcu wii ⁇ rsi ⁇ e ' bornlsTj which can be opened ⁇ whollvior partly.
  • part of the side wall can be formed of a transparent material, hence it is possible to inspect the conveyor belt during the impingement process, without entering the outer housing.
  • the impingement freezer according to the present invention can be used for freezing for example fish, meat, cookies, dough, vegetables or the like.
  • the impingement freezer is applicable for cooling liquid in e.g. bottles.
  • gas condition means like e.g. a heater, heating grills, heat exchanger or the like.
  • Fig. 1 shows a cross/side view of an impingement freezer according to the present invention
  • Fig. 2 shows a cross/end view of an impingement freezer according to the present invention.
  • Fig. 1 shows an impingement freezer 1 comprising an outer housing 2 having side walls 3, ceiling 4 and floor 5.
  • the outer housing 2 comprises gas condition means 6 for cooling air and encloses a high-pressure chamber 7 formed by one or more ventilators 8 for circulating the gas, side panels 9 and a perforated plate 10.
  • the high-pressiiire chamber 7 is positioned above the conveyor belt 11 so that the perforated plate 1 ⁇ is facing the conveyor belt 11 allowing the gas to be impinged through the perforated plate 10 onto the conveyor belt 11, which is arranged in a zone (not shown) between the perforated plate 10 and a. plate member 12 . .
  • the plate member 12 is part of a bottom construction 13 positioned below the con- veypr belt 11 and the plate member 12 is provided with perforated channels 14 and lion-perforated channels 15, which are arranged preferably perpendicular to the travelling direction of the conveyor belt 11.
  • the conveyor 'belt 11 has a first end part 16 outside the outer housing 2 for placing the products (not shown) on the conveyor belt 11 and a second end part 17 outside the outer housing 2 allowing the removal of the treated products (not shown).
  • Fig. 2 shows the impingement freezer 1 comprising an outer housing 2 having side walls 3, ceiling 4 and floor 5.
  • the outer housing 2 comprises gas condition means 6 for cooling air and encloses a high-pressure chamber 7 formed by ventilator 8 for circulating the gas, side panels 9 and a perforated plate 10.
  • the side walls 3 and the side panels 9 provides a return access channel 18 for the circulated gas.
  • the gas condition means 6 are arranged at the end of the return access channel 18, thus causing the circulated gas to pass through before entering the high pressure chamber 7.
  • the perforated plate 10 is pivotally hinged allowing access into the zone 19 from above.
  • the conveyor belt 11 is arranged in the zone 19 between the perforated plate 10 and a plate member 12, and the zone 19 is provided with at least one open side 20, which is open towards the return access channel 18.
  • the perforated channels 14 are provided with one access 21 for gas from the high- pressure chamber 7, and the perforated channels 14 are formed with inclined bottom part 22, hence causing uniform distribution of the circulated gas.

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)
  • Devices That Are Associated With Refrigeration Equipment (AREA)

Abstract

La présente invention se rapporte à un congélateur par injection (1) comprenant un boîtier extérieur (2) comportant des parois latérales (3), un plafond (4) et un plancher (4), où le boîtier extérieur (2) comprend un moyen de conditionnement de gaz (6), de préférence pour refroidir le gaz et entoure une chambre à haute pression (7) formée par un ou plusieurs ventilateurs (8) destinés à faire circuler le gaz, des panneaux latéraux (9) et une plaque perforée (10), où la chambre à haute pression (7) est positionné de telle sorte que la plaque perforée (10) fasse face à une courroie de convoyeur (11) destinée à transporter des produits en permettant au gaz d'être injecté au travers de la plaque perforée (10) sur la courroie de convoyeur (11) qui est disposée dans une zone (19) entre la plaque perforée (10) et un élément de plaque (12) et où les parois latérales (3) et les panneaux latéraux (9) fournissent un canal d'accès de retour (18) pour le gaz mis en circulation, la zone (19) étant munie d'au moins un côté ouvert (20) qui est ouvert vers le canal d'accès de retour (18).
EP06706098A 2005-03-04 2006-03-02 Congelateur par injection Withdrawn EP1866582A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK200500335A DK200500335A (da) 2005-03-04 2005-03-04 Impingement fryser
PCT/DK2006/000127 WO2006092145A1 (fr) 2005-03-04 2006-03-02 Congelateur par injection

Publications (1)

Publication Number Publication Date
EP1866582A1 true EP1866582A1 (fr) 2007-12-19

Family

ID=36250811

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06706098A Withdrawn EP1866582A1 (fr) 2005-03-04 2006-03-02 Congelateur par injection

Country Status (6)

Country Link
US (1) US20080163640A1 (fr)
EP (1) EP1866582A1 (fr)
CA (1) CA2599700A1 (fr)
DK (1) DK200500335A (fr)
NO (1) NO20074503L (fr)
WO (1) WO2006092145A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100068357A1 (en) * 2006-03-28 2010-03-18 Cargill, Incorporated Pork Systems and Methods
RU2468315C2 (ru) * 2007-07-25 2012-11-27 Марел Фризинг энд Темприча Дивижн Устройство для газовой термообработки
US20100104708A1 (en) * 2008-10-23 2010-04-29 Rc Obert Food product stabilizer system
US9739520B2 (en) 2011-11-10 2017-08-22 John Bean Technologies Corporation Combined impingement/plate freezer
GB2545758A (en) * 2015-12-22 2017-06-28 Linde Ag Apparatus for generation of pulsed flow for impingement hoods
EP3502595A1 (fr) * 2017-12-19 2019-06-26 Air Liquide Deutschland GmbH Appareil et procédé de refroidissement de produits
CN114506631A (zh) * 2022-03-30 2022-05-17 江苏新联达制带科技有限公司 一种带有挡边的耐高温输送带

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
FR975566A (fr) * 1942-02-21 1951-03-07 Anciens Ets Brissonneau & Lotz Perfectionnements aux appareils de chauffage ou de refroidissement des produits alimentaires
US3813895A (en) * 1972-09-28 1974-06-04 Air Prod & Chem Food freezing apparatus
JP3373897B2 (ja) * 1992-07-13 2003-02-04 大阪酸素工業株式会社 トンネル形冷凍チャンバ
US5408921A (en) * 1992-12-31 1995-04-25 Frigoscandia Equipment Aktiebolag Apparatus for gas treatment of products
US5551251A (en) * 1995-02-08 1996-09-03 York Food Systems Impingement freezer
SE515811C2 (sv) * 1999-01-20 2001-10-15 Frigoscandia Equipment Ab Apparat för gasbehandling av produkter innefattande en högtryckskammare
US6334330B2 (en) * 1999-07-26 2002-01-01 Praxair, Inc. Impingement cooler
US7008658B2 (en) * 2002-05-29 2006-03-07 The Boc Group, Inc. Apparatus and method for providing treatment to a continuous supply of food product by impingement
AU2003268111B2 (en) * 2002-08-20 2009-03-05 Linde Gas North America Llc Flow enhanced tunnel freezer

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006092145A1 *

Also Published As

Publication number Publication date
US20080163640A1 (en) 2008-07-10
DK200500335A (da) 2006-09-05
NO20074503L (no) 2007-09-05
WO2006092145A1 (fr) 2006-09-08
CA2599700A1 (fr) 2006-09-08

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