WO1998049505A1 - Method and apparatus for surface freezing - Google Patents
Method and apparatus for surface freezing Download PDFInfo
- Publication number
- WO1998049505A1 WO1998049505A1 PCT/SE1998/000735 SE9800735W WO9849505A1 WO 1998049505 A1 WO1998049505 A1 WO 1998049505A1 SE 9800735 W SE9800735 W SE 9800735W WO 9849505 A1 WO9849505 A1 WO 9849505A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- foraminous
- conveyor belt
- belt
- jets
- cold air
- Prior art date
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
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/361—Freezing; Subsequent thawing; Cooling the materials being transported through or in the apparatus, with or without shaping, e.g. in form of powder, granules, or flakes
- A23L3/362—Freezing; Subsequent thawing; Cooling the materials being transported through or in the apparatus, with or without shaping, e.g. in form of powder, granules, or flakes with packages or with shaping in form of blocks or portions
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/36—Freezing; Subsequent thawing; Cooling
- A23L3/37—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals
- A23L3/375—Freezing; Subsequent thawing; Cooling with addition of or treatment with chemicals with direct contact between the food and the chemical, e.g. liquid nitrogen, at cryogenic temperature
-
- 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
- F25D25/00—Charging, supporting, and discharging the articles to be cooled
- F25D25/04—Charging, supporting, and discharging the articles to be cooled by conveyors
Definitions
- the present invention relates to a method and an apparatus for freezing a surface layer of a food product.
- the products can easily mould to the base, on which they are frozen. This is disadvantageous if the base has a shape that differs from the one that is desirable for the product in its final frozen form. There is also a risk that the products freeze onto the base, which results on the one hand in the product being defec- tive and, on the other hand, in residues of the product remaining on the base and needing to be removed before the base can be used again.
- the object of the present invention is to provide a method of freezing a surface layer of a food product in an energy-effective manner and while ensuring that the surface layer over the major part of the lower surface of the product is frozen.
- the food product is thus placed on a non-foraminous conveyor belt and cold air in the form of jets is blown towards the underside of the conveyor belt.
- This results in very efficient cooling of the non-foraminous conveyor belt from the underside thereof, thereby achieving rapid freezing of a layer closest to the lower surface of the product, said lower surface abutting directly against the upper side of the non-foraminous conveyor belt.
- the non-foraminous conveyor belt comprises a non-foraminous foil strip support- ed by a foraminous supporting belt.
- the cold jets When the cold jets are blown towards the underside of the this conveyor belt, they pass through the foraminous supporting belt and press the foil strip into intimate contact with a major part of the underside of the food product, even if this surface is somewhat uneven. Excellent heat transmission is thus achieved, and the bottom layer of the food product can rapidly be transferred to a frozen state.
- the conveyor belt comprises a single belt of metal or some other material hav- ing good thermal conductivity, such that also in this case excellent heat transmission can be achieved and the bottom layer of the food product thus can be quickly transferred to a frozen state.
- the cold air is blown in the form of jets towards the underside of the non-foraminous conveyor belt in a stationary area, which extends over the width of the non-foraminous conveyor belt, while at the same time the non-foraminous conveyor belt is successively moved past the stationary area.
- a superposed, non-foraminous cover belt which is positioned on top of and in contact with the food product on the non-foraminous conveyor belt and which is moved in parallel therewith. Also in this case, cold air is blown in the form of jets towards the upper side of the superposed cover belt. As a result, the entire surface layer, or a great part thereof, of the food product can be frozen effectively, i.e. with good heat transmission and in a short time.
- An apparatus for carrying out the inventive method comprises a non-foraminous conveyor belt and a plurality of stationary nozzles for blowing cold air in the form of jets towards the underside of the non-foraminous conveyor belt in an area which extends over the width of the non- foraminous conveyor belt.
- the non-foraminous con- veyor belt comprises a non-foraminous foil strip supported by a foraminous supporting belt.
- the non-foraminous conveyor belt can consist of a single non-foraminous belt of metal or some other material with good thermal conductivity.
- the apparatus also comprises a superposed, non-foraminous cover belt, which is arranged above the non-foraminous conveyor belt to cover a food product positioned on said conveyor belt, and a plurality of additional stationary nozzles for blowing cold air in the form of jets towards the upper side of the superposed, non-foraminous cover belt.
- the superposed cover belt preferably is a non-foraminous foil strip, but it can also consist of a belt of metal or some other material with good thermal conducti- vity.
- the drawing illustrates a freezer 1 with a feed opening 2 and a discharge opening 3.
- the freezer 1 can be of the type using a foraminous conveyor belt 4, which moves the food products that are to be frozen along a helical path from the feed opening 2 to the discharge opening 3 while cold air is forced to flow round the food products, such that they are completely frozen when reaching the discharge opening 3 of the freezer 1.
- An apparatus 5 according to the invention is in this case used as a prefreezer for producing at least a frozen bottom layer on food products 6 before they are placed on the foraminous conveyor belt 4 of the freezer 1.
- the apparatus 5 comprises a foraminous supporting belt 5 which travels in an endless path over two deflecting rollers 8 and 9.
- a storage roll 10 contains a foil strip 11, which from the storage roll 10 is extended over an upper run 12 for the supporting belt 7 to a receiving roll 13.
- a plurality of stationary nozzles 14 are arranged under the supporting belt 7 in the upper run 12 thereof.
- the nozzles 14 are distributed in an area which extends over essentially the entire width of the supporting belt 7, said width being essentially the same as or greater than the width of the foil strip 11.
- the nozzles 14 constitute outlets from a duct 15 which in turn is supplied with cold air at high pressure by means of a fan 16, such that the nozzles 14 eject jets, i.e. streams of air at such a speed that the layer of air closest to the foil strip 11 is broken, which considerably improves the heat transmission.
- a second foil strip 19 can be passed essentially parallel with the supporting belt 7 and the foil strip 11 from a storage roll 20 to a receiving roll 21.
- the second foil strip 19 can be made to follow a path which connects to the top faces of the food products 6 conveyed on the foil strip 11 and the supporting belt 7 along the upper run 12.
- the foil strip 19 is also pressed down towards the top face of the food products 6 by means of jets of cold air, which are directed by the nozzles 24 towards the upper side of the second foil strip 19.
- nozzles 24 constitute outlets from a duct 25, which can be connected to the outlet side of the fan 16 or to the outlet side of a correspondingly arranged fan, such that the jets of cold air from the nozzles 24 press the second foil strip 19 into good contact with at least an essential part of the top faces of the products 6 and, thus, rapidly freeze the surface layer closest to the foil strip 19.
- the supporting belt 7 and the foil strip 11 constitute a non-foraminous conveyor belt, which supports the food products 6 and towards the underside of which in the upper run 12 the jets of cold air are blown from the nozzles 14.
- a non- foraminous belt of metal or some other material could replace the belt 7 and the strip 11 and on its own con- stitute the non-foraminous conveyor belt.
- the foil strip 19 forms in the same manner a non-foraminous cover belt, which in an alternative embodiment could be a belt of metal or some other material having good thermal conductivity.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Freezing, Cooling And Drying Of Foods (AREA)
- Confectionery (AREA)
- Belt Conveyors (AREA)
- Chain Conveyers (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54688098A JP2001527633A (en) | 1997-04-25 | 1998-04-23 | Surface refrigeration method and apparatus |
EP98920774A EP0977970A1 (en) | 1997-04-25 | 1998-04-23 | Method and apparatus for surface freezing |
AU73538/98A AU728000B2 (en) | 1997-04-25 | 1998-04-23 | Method and apparatus for surface freezing |
CA002288909A CA2288909C (en) | 1997-04-25 | 1998-04-23 | Method and apparatus for surface freezing |
US09/422,966 US6148618A (en) | 1997-04-25 | 1999-10-22 | Method and apparatus for surface freezing |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9701550-7 | 1997-04-25 | ||
SE9701550A SE506959C2 (en) | 1997-04-25 | 1997-04-25 | Methods and apparatus for surface freezing |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/422,966 Continuation US6148618A (en) | 1997-04-25 | 1999-10-22 | Method and apparatus for surface freezing |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998049505A1 true WO1998049505A1 (en) | 1998-11-05 |
Family
ID=20406716
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1998/000735 WO1998049505A1 (en) | 1997-04-25 | 1998-04-23 | Method and apparatus for surface freezing |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0977970A1 (en) |
JP (1) | JP2001527633A (en) |
CN (1) | CN1140754C (en) |
AU (1) | AU728000B2 (en) |
CA (1) | CA2288909C (en) |
SE (1) | SE506959C2 (en) |
WO (1) | WO1998049505A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001004554A1 (en) * | 1999-07-07 | 2001-01-18 | Roger Dew | Quick-freeze tunnel for food products with non-continuous driving film |
EP0986966A3 (en) * | 1998-08-10 | 2001-02-14 | Praxair Technology, Inc. | Impingement cooler |
FR2808080A1 (en) * | 2000-04-25 | 2001-10-26 | Paul Tondeux | Device for continuous deep freezing of beef burgers, etc. on conveyor has casing at evaporator outlet directing cold air from evaporator onto conveyor |
US6334330B2 (en) | 1999-07-26 | 2002-01-01 | Praxair, Inc. | Impingement cooler |
US6557367B1 (en) | 2002-03-28 | 2003-05-06 | Praxair Technology, Inc. | Impingement cooler with improved coolant recycle |
EP1330959A3 (en) * | 1999-01-20 | 2003-09-03 | Frigoscandia Equipment Aktiebolag | Apparatus for gas treatment of products |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2762969B3 (en) * | 1997-05-07 | 1999-06-25 | Roger Dew | CONTINUOUS FREEZING ENCLOSURE WITH SUPERIMPOSED REFRIGERATED TABLES |
JP2003061633A (en) * | 2001-08-30 | 2003-03-04 | Ip:Kk | Food freezer |
CN1295471C (en) * | 2005-01-28 | 2007-01-17 | 南通冷冻设备有限公司 | Freezing device |
CN100453935C (en) * | 2007-06-27 | 2009-01-21 | 浙江海洋学院 | Revolving drum type quick-freeze device |
WO2012001798A1 (en) * | 2010-06-30 | 2012-01-05 | 株式会社前川製作所 | Cold air injection mechanism |
EP2955466B1 (en) | 2014-06-13 | 2020-02-12 | John Bean Technologies AB | Temperature treatment apparatus and method for solidifying portions of fluid |
CN107821910A (en) * | 2017-12-01 | 2018-03-23 | 上海海洋大学 | A kind of elongate strip funnel-form fluidic nozzle configurations |
CN107763942A (en) * | 2017-12-01 | 2018-03-06 | 上海海洋大学 | A kind of impact type quick freezing machine Circular Jet nozzle arrangements |
CN109140861A (en) * | 2018-08-06 | 2019-01-04 | 湖州日晨生态农业开发有限公司 | A kind of fresh-water fishes quick-freezing plant |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1595552A (en) * | 1977-02-18 | 1981-08-12 | Frigoscandia Contracting Ab | Methods for the heat treatment of products and apparatus for carrying out the method |
GB2141813A (en) * | 1983-05-21 | 1985-01-03 | Star Refrigeration | Cooling apparatus |
US5543167A (en) * | 1995-01-05 | 1996-08-06 | Fujitetsumo Co., Ltd. | Cooked rice freezing method and apparatus |
US5551251A (en) * | 1995-02-08 | 1996-09-03 | York Food Systems | Impingement freezer |
-
1997
- 1997-04-25 SE SE9701550A patent/SE506959C2/en unknown
-
1998
- 1998-04-23 CN CNB988054841A patent/CN1140754C/en not_active Expired - Fee Related
- 1998-04-23 WO PCT/SE1998/000735 patent/WO1998049505A1/en not_active Application Discontinuation
- 1998-04-23 JP JP54688098A patent/JP2001527633A/en not_active Ceased
- 1998-04-23 AU AU73538/98A patent/AU728000B2/en not_active Ceased
- 1998-04-23 CA CA002288909A patent/CA2288909C/en not_active Expired - Fee Related
- 1998-04-23 EP EP98920774A patent/EP0977970A1/en not_active Ceased
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1595552A (en) * | 1977-02-18 | 1981-08-12 | Frigoscandia Contracting Ab | Methods for the heat treatment of products and apparatus for carrying out the method |
GB2141813A (en) * | 1983-05-21 | 1985-01-03 | Star Refrigeration | Cooling apparatus |
US5543167A (en) * | 1995-01-05 | 1996-08-06 | Fujitetsumo Co., Ltd. | Cooked rice freezing method and apparatus |
US5551251A (en) * | 1995-02-08 | 1996-09-03 | York Food Systems | Impingement freezer |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0986966A3 (en) * | 1998-08-10 | 2001-02-14 | Praxair Technology, Inc. | Impingement cooler |
EP1330959A3 (en) * | 1999-01-20 | 2003-09-03 | Frigoscandia Equipment Aktiebolag | Apparatus for gas treatment of products |
USRE42510E1 (en) | 1999-01-20 | 2011-07-05 | John Bean Technologies Ab | Apparatus for gas treatment of products |
WO2001004554A1 (en) * | 1999-07-07 | 2001-01-18 | Roger Dew | Quick-freeze tunnel for food products with non-continuous driving film |
US6334330B2 (en) | 1999-07-26 | 2002-01-01 | Praxair, Inc. | Impingement cooler |
FR2808080A1 (en) * | 2000-04-25 | 2001-10-26 | Paul Tondeux | Device for continuous deep freezing of beef burgers, etc. on conveyor has casing at evaporator outlet directing cold air from evaporator onto conveyor |
WO2001081843A1 (en) * | 2000-04-25 | 2001-11-01 | Paul Tondeux | Device for optimising continuous deep-freezing of bulk products, individually, installation equipped with same and use thereof |
US6557367B1 (en) | 2002-03-28 | 2003-05-06 | Praxair Technology, Inc. | Impingement cooler with improved coolant recycle |
Also Published As
Publication number | Publication date |
---|---|
EP0977970A1 (en) | 2000-02-09 |
CN1140754C (en) | 2004-03-03 |
CA2288909A1 (en) | 1998-11-05 |
AU7353898A (en) | 1998-11-24 |
CN1257573A (en) | 2000-06-21 |
SE9701550D0 (en) | 1997-04-25 |
AU728000B2 (en) | 2001-01-04 |
SE9701550L (en) | 1998-03-09 |
CA2288909C (en) | 2007-01-23 |
JP2001527633A (en) | 2001-12-25 |
SE506959C2 (en) | 1998-03-09 |
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