EP2183532A1 - Dispositif de surgelation cryogenique de produits utilisant un tapis convoyeur poreux - Google Patents
Dispositif de surgelation cryogenique de produits utilisant un tapis convoyeur poreuxInfo
- Publication number
- EP2183532A1 EP2183532A1 EP08827133A EP08827133A EP2183532A1 EP 2183532 A1 EP2183532 A1 EP 2183532A1 EP 08827133 A EP08827133 A EP 08827133A EP 08827133 A EP08827133 A EP 08827133A EP 2183532 A1 EP2183532 A1 EP 2183532A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- band
- bath
- carpet
- products
- drum
- 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
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
- F25D3/10—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 cryogenic product freezing device. It is well known that certain food products are very difficult to freeze and it is then necessary to use freezer equipment whose main qualities must be:
- Freezing which must be as effective for the lower surface of the product as for its upper surface. - The process must not mark the underside of the products. the products must not stick to the surface on which they are laid.
- the equipment should allow only the surface of the product not the heart to be frozen (and thus achieve what is known in this industry as "crusting”).
- the pore size of the conveyor belt is such that cryogenic liquid can be retained therein, so as to ensure total or partial freezing of the article by thermal transfer between the article and the cryogenic liquid retained in the invention. porous support.
- the polyester mat on which the products to be crusted are placed must convey the products correctly through the freezer and in particular, it must imperatively ensure a regular passage time in the freezer and in the nitrogen bath.
- regular passage time is meant a constant passage time (ie substantially constant) during a production phase, or during a day, regardless of the product being processed, the treated batch etc.
- the second condition for the success of the operation is a regular immersion in the bath of liquid nitrogen, all the products being immersed in a substantially constant height of liquid nitrogen.
- the bath of liquid nitrogen must have a substantially constant height and the conveyor must pass flat in this bath, at a substantially constant distance from the surface bath.
- the deformation of the conveyor belt in the nitrogen immersion tank the carpet does not remain perfectly flat in the bath because bubbles of nitrogen gas form under the carpet and make it swell in its central part while the edges stay in place at the bottom of the tank.
- the tension of the band also tends to lift the carpet at its center while the edges remain in place at the bottom of the bath.
- this system certainly divides the production into several channels but when the tank is filled with liquid nitrogen, under the carpet, bubbles of nitrogen gas are formed and create a sufficient pressure to deform the carpet and form two small bumps, one on each side of the "ski".
- the present invention proposes a technical solution to the previous problems where it aims to establish a constant carpet speed and a regular nitrogen bath above the carpet at each point of the tray. adopting a totally different strategy from those used according to the prior art:
- the tension of the band is set to a value as low as possible so as not to create a problem in the bath.
- the band will slide on its drive drum (which is considered classically as a disadvantage).
- rollers come to press the band against the drum. They increase the angle and the force of contact between the drum and the carpet. Locally, on the drum, the adhesion force is thus considerably increased without deforming the carpet in the bath since the tension of the band remains low in the rest of the machine. Thus, the passage time is totally controlled and stable.
- the present invention adopts a lower tension but locally plate on the drum carpet with rollers, and the overall desired tension for the carpet is obtained by moving the drums away from each other.
- the present invention tends little conveyor, so the system is relatively “soft”, it passes therefore inside the bath without difficulties, and we compensate this by pressing the carpet on a single drum (the one equipped with the engine) to through pebbles (eg a free wheel that presses and follows the movement ..).
- a space is arranged between the carpet and the bottom of the tray. This space allows the gas bubbles to escape through the inlet and outlet sides of the carpet in the system, without creating overpressure under the band and therefore without lifting.
- the band remains in place, well flat at a fixed distance from the surface of the liquid nitrogen bath.
- the carpet does not pass on the BACKGROUND of the tray, it goes "in height", a few mm or cm above the bottom of the tray
- the depth of the bath and the intensity of the cryogenic treatment are controlled: the depth of the bath is constant for all the products, it can be adjusted easily according to the needs.
- the size of this type of machine can be increased and the production capacity is no longer limited by technical problems.
- the quality of freezing is constant and the process parameters can be adjusted at best to optimize the process and reduce its cost.
- the present invention relates to a device for the freezing of articles, comprising a porous belt conveyor held in place in the device by drums, as well as means for impregnating cryogenic liquid with said belt of the conveyor, the impregnation of the band being wholly or partially by immersion of the band in a bath of cryogenic liquid, and characterized in that it comprises means for plating the band on one of said drums.
- said plating means are constituted by a system of rollers integral with a freewheel capable of pressing / pressing the band on said drum and following the movement of this drum.
- a space is arranged between the conveyor and the bottom of the container containing said bath, this space being adapted to allow gas bubbles that would form under the conveyor within the bath to escape in whole or in part by the "input” and “output” sides of the device conveyor, without creating overpressure under the conveyor.
- Said conveyor is advantageously made of a porous material which is a synthetic or natural polymer fabric, woven or nonwoven, and preferably polyester.
- FIGS. 1 and 2 respectively illustrate (in longitudinal and transverse views) the structure of a freezer with polyester carpet and nitrogen bath according to the prior art, and according to the present invention (implementing a roller system and a space between the carpet and bottom of the liquid nitrogen tank).
- FIG. 1 (1a and 1b) shows schematically the main constituent elements of a polyester carpet and nitrogen bath freezer according to the prior art, as described in the introductory part of the present application.
- the device comprises rollers for pressurizing the belt of the conveyor on the drive drum (drum on the left in the figure, equipped with the motor), the rollers forming part of a freewheel pressing the conveyor belt on said drum and able to follow the movement of this drum.
- the junction arrives on the drum in a space between two bars. In this case, the junction can pass smoothly between the drum and the rollers; The junction arrives on the drum just at a bar (junction on the bar). In this case, it can not pass and the drum begins to slide on the tape (the drum continues to rotate but the tape remains stationary). When the drum has slipped slightly, the junction is found in a space between two bars and can then pass. This small very temporary slip does not interfere with the proper functioning of the device and this improvement thus allows a continuous advance of the band even when the junction passes between the drum and the rollers.
- an active guidance system for the strip in which a sensor detects the position of the strip. For example, when the belt is positioned too far right, the angle of the motor drum at the output of the machine is automatically changed via a jack, which results in a repositioning further left of the band. Conversely, when the band is positioned too far to the left, the angle of the motor drum at the output of the machine is automatically modified via a jack. This has as a consequence a repositioning more right of the band.
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)
- Treatment Of Fiber Materials (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Belt Conveyors (AREA)
- Drying Of Solid Materials (AREA)
- Structure Of Belt Conveyors (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL08827133T PL2183532T3 (pl) | 2007-07-30 | 2008-07-07 | Urządzenie do głębokiego zamrażania kriogenicznego produktów, wykorzystujące porowaty przenośnik taśmowy |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0756805A FR2919715B1 (fr) | 2007-07-30 | 2007-07-30 | Dispositif de surgelation cryogenique de produits utilisant un tapis convoyeur poreux |
| PCT/FR2008/051255 WO2009019361A1 (fr) | 2007-07-30 | 2008-07-07 | Dispositif de surgelation cryogenique de produits utilisant un tapis convoyeur poreux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2183532A1 true EP2183532A1 (fr) | 2010-05-12 |
| EP2183532B1 EP2183532B1 (fr) | 2011-01-26 |
Family
ID=39149396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP08827133A Active EP2183532B1 (fr) | 2007-07-30 | 2008-07-07 | Dispositif de surgelation cryogenique de produits utilisant un tapis convoyeur poreux |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP2183532B1 (fr) |
| JP (1) | JP2010535323A (fr) |
| CN (1) | CN101765751B (fr) |
| AT (1) | ATE497135T1 (fr) |
| DE (1) | DE602008004786D1 (fr) |
| DK (1) | DK2183532T3 (fr) |
| ES (1) | ES2360274T3 (fr) |
| FR (1) | FR2919715B1 (fr) |
| PL (1) | PL2183532T3 (fr) |
| WO (1) | WO2009019361A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2964836A1 (fr) * | 2010-09-20 | 2012-03-23 | Saint Jean | Appareil de refroidissement d'un produit, en vue de sa solidification, et son procede de mise en œuvre |
| JP6078227B2 (ja) * | 2011-10-17 | 2017-02-08 | 大陽日酸株式会社 | 急速凍結装置及び急速凍結方法 |
| PL3358280T3 (pl) | 2017-02-02 | 2020-11-30 | L'air Liquide, Société Anonyme pour l'Étude et l'Exploitation des Procédés Georges Claude | Sposób i urządzenie do kriogenicznego zamrażania produktów |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6217576A (ja) * | 1985-07-16 | 1987-01-26 | 株式会社 福伸鉄工 | 無限軌道付冷凍機 |
| FR2686403B1 (fr) * | 1992-01-21 | 2001-02-09 | Air Liquide | Procede et dispositif de congelation. |
| JP2607147Y2 (ja) * | 1993-09-10 | 2001-04-16 | アンリツ株式会社 | 金属検出機のコンベア駆動装置 |
| JPH09303926A (ja) * | 1996-05-08 | 1997-11-28 | Nippon Sanso Kk | 低温液化ガス浸漬式凍結装置 |
| US5921091A (en) * | 1996-10-09 | 1999-07-13 | American Air Liquide, Incorporated | Liquid air food freezer and method |
| DE19840037B4 (de) * | 1998-09-02 | 2016-12-08 | Air Liquide Deutschland Gmbh | Verfahren und Vorrichtung zum Gefrieren von Gefriergut |
| JP3848578B2 (ja) * | 2002-01-30 | 2006-11-22 | マルヤス機械株式会社 | ベルトコンベア |
| FR2882810B1 (fr) * | 2005-03-02 | 2007-04-27 | Air Liquide | Generateur de glacons de produits liquides ou pateux |
-
2007
- 2007-07-30 FR FR0756805A patent/FR2919715B1/fr not_active Expired - Fee Related
-
2008
- 2008-07-07 ES ES08827133T patent/ES2360274T3/es active Active
- 2008-07-07 AT AT08827133T patent/ATE497135T1/de active
- 2008-07-07 DK DK08827133.3T patent/DK2183532T3/da active
- 2008-07-07 PL PL08827133T patent/PL2183532T3/pl unknown
- 2008-07-07 JP JP2010518714A patent/JP2010535323A/ja active Pending
- 2008-07-07 CN CN2008801010408A patent/CN101765751B/zh not_active Expired - Fee Related
- 2008-07-07 EP EP08827133A patent/EP2183532B1/fr active Active
- 2008-07-07 WO PCT/FR2008/051255 patent/WO2009019361A1/fr not_active Ceased
- 2008-07-07 DE DE602008004786T patent/DE602008004786D1/de active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009019361A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE602008004786D1 (de) | 2011-03-10 |
| ATE497135T1 (de) | 2011-02-15 |
| PL2183532T3 (pl) | 2011-06-30 |
| CN101765751B (zh) | 2012-07-11 |
| WO2009019361A1 (fr) | 2009-02-12 |
| FR2919715B1 (fr) | 2009-10-02 |
| CN101765751A (zh) | 2010-06-30 |
| FR2919715A1 (fr) | 2009-02-06 |
| JP2010535323A (ja) | 2010-11-18 |
| EP2183532B1 (fr) | 2011-01-26 |
| ES2360274T3 (es) | 2011-06-02 |
| DK2183532T3 (da) | 2011-05-16 |
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