EP3403037A1 - Système permettant l'extraction automatique des gaz froids dans une armoire de surgélation fonctionnant avec un fluide cryogenique - Google Patents
Système permettant l'extraction automatique des gaz froids dans une armoire de surgélation fonctionnant avec un fluide cryogeniqueInfo
- Publication number
- EP3403037A1 EP3403037A1 EP17702424.7A EP17702424A EP3403037A1 EP 3403037 A1 EP3403037 A1 EP 3403037A1 EP 17702424 A EP17702424 A EP 17702424A EP 3403037 A1 EP3403037 A1 EP 3403037A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cabinet
- extraction
- enclosure
- cryogenic fluid
- extraction tube
- 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
- 238000000605 extraction Methods 0.000 title claims abstract description 43
- 239000012530 fluid Substances 0.000 title claims abstract description 9
- 239000007789 gas Substances 0.000 title abstract description 23
- 238000007710 freezing Methods 0.000 claims abstract description 11
- 230000008014 freezing Effects 0.000 claims abstract description 11
- 239000012809 cooling fluid Substances 0.000 claims abstract description 4
- 235000013305 food Nutrition 0.000 claims abstract description 4
- 238000009834 vaporization Methods 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000007788 liquid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 206010002660 Anoxia Diseases 0.000 description 1
- 241000976983 Anoxia Species 0.000 description 1
- 206010021143 Hypoxia Diseases 0.000 description 1
- 230000007953 anoxia Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000035987 intoxication Effects 0.000 description 1
- 231100000566 intoxication Toxicity 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/042—Air treating means within refrigerated spaces
- F25D17/045—Air flow control arrangements
-
- 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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/005—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces in cold rooms
-
- 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
- F25D3/102—Stationary cabinets
-
- 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
- F25D3/12—Devices using other cold materials; Devices using cold-storage bodies using solidified gases, e.g. carbon-dioxide snow
- F25D3/122—Stationary cabinets
Definitions
- the present invention relates to the field of cabinets used for deep freezing or storage of food products, medical or biological, using a cryogenic gas as a cooling fluid, and it is particularly interested in the gas extraction system equipping such cabinets and that is an important element.
- the first solution is to install a system of permanent heating of the joints so as to avoid that they go down too low in temperature and that they lose their elastic properties.
- the joints then remain flexible and watertight longer than when they are subjected to low temperatures.
- the leakage problem is then delayed without being removed, which can sometimes be appropriate.
- this technique has a significant cost.
- the second solution is to install an active extraction (fan in the extraction tube, see above), which will create a vacuum inside the cryogenic chamber.
- an active extraction fan in the extraction tube, see above
- the freezer then leaves no gas out in the production room and the small air inlet in the device does not disturb the freezing process to the extent that this air intake remains at a limited level.
- an active extraction is installed.
- the latter consists of a fan installed in the tube extraction, a power supply and a control system that triggers its operation when necessary. All this set has a significant cost in the total cost of the freezer installation and when possible, an installation without active extraction will always be preferred by the production site.
- the present invention seeks to provide a technical solution which aims to overcome the problem of door seals cryogenic cabinets at a negligible cost.
- the proposed solution comprises a flap (flap whose cost is negligible), located at the entrance of the extraction tube in the freezer cabinet, flap extending inwardly of the cabinet, and whose shape, the position and orientation can take advantage of the turbulence created by the fans.
- a flap flap whose cost is negligible
- flap flap whose cost is negligible
- the turbulence created is partially deflected by the flap towards the extraction tube, thus pushing the gases towards the outside of the enclosure and thus creating a vacuum inside the freezing chamber.
- This panel will be chosen according to the type of fans used in the cabinet and their direction (clockwise or counterclockwise) of operation.
- this component must be studied to disturb as little as possible the freezing process of the cabinet (studied for example by modeling or simply by actual cabinet tests), especially to verify that the component provides the desired effect which is to create a depression inside the cabinet, that the shutter does not disturb too much the circulation of the air in the cell and that it does not degrade the heat transfer coefficient in the freezer cabinet.
- the attached figures illustrate four embodiments of these components, depending on whether the extraction is located at the bottom or top of the freezer cabinet and that the fans turn clockwise or counterclockwise.
- FIG. 3 illustrates an hourly operating situation of the fans, and where the extraction is located at the top of the freezer cabinet.
- the flap positioned at the inlet of the extraction tube towards the inside of the freezing cabinet (view of the middle), at least part of the turbulence rushes into the tube inlet. extraction (right view).
- the shutter here has a truncated cylinder shape.
- FIG. 4 appended illustrates a counterclockwise operation situation of the fans, and where the extraction is located again at the top of the the freezer cabinet.
- the shutter positioned at the inlet of the extraction tube towards the inside of the deep-freeze cabinet (in the middle view), at least part of the turbulence rushes into the tube inlet. extraction (right view).
- the shutter here has a form of "bent tube”.
- the invention relates to a cabinet used for freezing or storing food products, medical or biological, using a cryogenic fluid as a cooling fluid, cabinet type:
- extraction system comprising an extraction tube connected to a wall of the cabinet and connecting the speaker to the outside;
- the shutter whose shape, the position and orientation allow to divert to the extraction tube all or part of the turbulence created by said convection fan or fans.
- the vacuum created in the enclosure is adjustable by changing the speed of the fans and can go up to 200Pa (2mbar).
- This device performs an action comparable to that of an active extractor (fan installed in the extraction pipe) as practiced according to the prior art, but without active fan and its associated costs (the cost of the component implemented here is simply derisory).
- This system is suitable for freezer cabinets operating with liquid nitrogen or liquid CO 2 . It will prove particularly useful for CO 2 applications because in this case, even small gas leaks often have a strong impact in the production floor and are rarely tolerable.
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)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1650248A FR3046668B1 (fr) | 2016-01-13 | 2016-01-13 | Systeme permettant l'extraction automatique des gaz froids dans une armoire de surgelation fonctionnant avec un fluide cryogenique |
PCT/FR2017/050050 WO2017121951A1 (fr) | 2016-01-13 | 2017-01-10 | Système permettant l'extraction automatique des gaz froids dans une armoire de surgélation fonctionnant avec un fluide cryogenique |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3403037A1 true EP3403037A1 (fr) | 2018-11-21 |
EP3403037B1 EP3403037B1 (fr) | 2023-10-18 |
Family
ID=55806530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17702424.7A Active EP3403037B1 (fr) | 2016-01-13 | 2017-01-10 | Système permettant l'extraction automatique des gaz froids dans une armoire de surgélation fonctionnant avec un fluide cryogenique |
Country Status (6)
Country | Link |
---|---|
US (1) | US20190017738A1 (fr) |
EP (1) | EP3403037B1 (fr) |
ES (1) | ES2965038T3 (fr) |
FR (1) | FR3046668B1 (fr) |
PT (1) | PT3403037T (fr) |
WO (1) | WO2017121951A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1654343A (en) * | 1924-11-24 | 1927-12-27 | Charles A Moore | Precooling structure |
US1832874A (en) * | 1930-03-19 | 1931-11-24 | Charles A Moore | Air conditioning device for cold storage rooms |
US4344291A (en) * | 1980-04-28 | 1982-08-17 | Liquid Carbonic Corporation | Cryogenic cabinet freezer |
JPH0112150Y2 (fr) * | 1985-11-06 | 1989-04-10 | ||
FR2979697B1 (fr) * | 2011-09-07 | 2013-09-27 | Air Liquide | Systeme d'amelioration de l'equilibrage des gaz froids dans un tunnel de surgelation par la mise en oeuvre de zones tampon et de volets interieurs |
-
2016
- 2016-01-13 FR FR1650248A patent/FR3046668B1/fr active Active
-
2017
- 2017-01-10 WO PCT/FR2017/050050 patent/WO2017121951A1/fr active Application Filing
- 2017-01-10 US US16/069,572 patent/US20190017738A1/en not_active Abandoned
- 2017-01-10 ES ES17702424T patent/ES2965038T3/es active Active
- 2017-01-10 PT PT177024247T patent/PT3403037T/pt unknown
- 2017-01-10 EP EP17702424.7A patent/EP3403037B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
ES2965038T3 (es) | 2024-04-10 |
WO2017121951A1 (fr) | 2017-07-20 |
FR3046668B1 (fr) | 2018-02-16 |
EP3403037B1 (fr) | 2023-10-18 |
PT3403037T (pt) | 2023-12-07 |
FR3046668A1 (fr) | 2017-07-14 |
US20190017738A1 (en) | 2019-01-17 |
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