EP1184633A1 - Tunnel cryogénique de réfrigération de produits, notamment alimentaires - Google Patents
Tunnel cryogénique de réfrigération de produits, notamment alimentaires Download PDFInfo
- 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- Withdrawn
Links
Images
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)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
- le ventilateur comporte des pales radiales dont l'axe de rotation est sensiblement perpendiculaire à la direction longitudinale d'avancement du tapis et parallèle à ce dernier.
- le ventilateur comporte deux à six pales.
- le tunnel comprend des moyens d'inversion du sens de rotation du ventilateur.
- le tunnel comprend des moyens de variation de la vitesse de rotation du ventilateur.
- le tunnel comprend au moins deux ventilateurs tels que définis, disposés en des emplacements longitudinalement espacés du tunnel.
- chaque ventilateur est disposé au voisinage d'une extrémité du tunnel.
Claims (6)
- Tunnel cryogénique de réfrigération de produits, notamment alimentaires, comprenant un tapis horizontal convoyeur (1) des produits, ainsi que des moyens pour souffler un gaz froid sur ceux-ci et pour limiter la sortie du gaz froid du tunnel et/ou l'entrée de gaz extérieur dans le tunnel, caractérisé en ce qu'il comprend au moins un ventilateur (2), disposé au dessus du tapis convoyeur, muni de pales, radiales (3), s'étendant transversalement par rapport au tapis sur sensiblement toute la largeur de ce dernier, pales dont l'axe de rotation (XX) est sensiblement perpendiculaire à la direction longitudinale d'avancement du tapis (1) et parallèle à ce dernier.
- Tunnel selon la revendication 1, caractérisé en ce que le ventilateur (2) comporte deux à six pales.
- Tunnel selon la revendication 1 ou 2, caractérisé en ce qu'il comprend des moyens d'inversion du sens de rotation du ventilateur (2).
- Tunnel selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend des moyens de variation de la vitesse de rotation du ventilateur (2).
- Tunnel selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend au moins deux ventilateurs (2) tels que définis, disposés en des emplacements longitudinalement espacés du tunnel.
- Tunnel selon l'une quelconque des revendications précédentes, caractérisé en ce que chaque ventilateur est disposé au voisinage d'une extrémité du tunnel.
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 (fr) | 2002-03-06 |
Family
ID=8853901
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01402227A Withdrawn EP1184633A1 (fr) | 2000-09-01 | 2001-08-27 | Tunnel cryogénique de réfrigération de produits, notamment alimentaires |
Country Status (4)
Country | Link |
---|---|
US (1) | US6553781B2 (fr) |
EP (1) | EP1184633A1 (fr) |
CA (1) | CA2356335A1 (fr) |
FR (1) | FR2813661B1 (fr) |
Families Citing this family (2)
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)
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 (fr) * | 1981-02-24 | 1982-09-01 | Stichting Ontwikkeling Koeltechniek | Bâtiment d'entreposage frigorifique |
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 (fr) * | 1998-10-30 | 2000-05-11 | Daewoo Electronics Co., Ltd. | Generateur de rideau d'air pour refrigerateur |
Family Cites Families (3)
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 |
-
2000
- 2000-09-01 FR FR0011189A patent/FR2813661B1/fr not_active Expired - Fee Related
-
2001
- 2001-08-27 EP EP01402227A patent/EP1184633A1/fr not_active Withdrawn
- 2001-08-29 CA CA002356335A patent/CA2356335A1/fr not_active Abandoned
- 2001-08-30 US US09/941,605 patent/US6553781B2/en not_active Expired - Fee Related
Patent Citations (8)
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 (fr) * | 1981-02-24 | 1982-09-01 | Stichting Ontwikkeling Koeltechniek | Bâtiment d'entreposage frigorifique |
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 (fr) * | 1998-10-30 | 2000-05-11 | Daewoo Electronics Co., Ltd. | Generateur de rideau d'air pour refrigerateur |
Also Published As
Publication number | Publication date |
---|---|
FR2813661B1 (fr) | 2002-12-13 |
US20020029582A1 (en) | 2002-03-14 |
FR2813661A1 (fr) | 2002-03-08 |
US6553781B2 (en) | 2003-04-29 |
CA2356335A1 (fr) | 2002-03-01 |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: L'AIR LIQUIDE, S.A. A DIRECTOIRE ET CONSEIL DE SUR |
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Effective date: 20020906 |
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Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
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18W | Application withdrawn |
Effective date: 20031020 |