US20190017738A1 - System allowing automatic extraction of cold gases in a freezer cabinet operating with a cryogenic fluid - Google Patents
System allowing automatic extraction of cold gases in a freezer cabinet operating with a cryogenic fluid Download PDFInfo
- Publication number
- US20190017738A1 US20190017738A1 US16/069,572 US201716069572A US2019017738A1 US 20190017738 A1 US20190017738 A1 US 20190017738A1 US 201716069572 A US201716069572 A US 201716069572A US 2019017738 A1 US2019017738 A1 US 2019017738A1
- Authority
- US
- United States
- Prior art keywords
- cabinet
- flap
- enclosure
- deep
- freezing
- 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.)
- Abandoned
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
- 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 storing food, medical or biological products, using a cryogenic fluid as cooling liquid, and relates more particularly to the gas extraction system which is fitted to such cabinets and which is an important element.
- the cabinet when the cabinet is in operation, it is cooled by injection of a cryogenic fluid such as liquid nitrogen or liquid CO 2 into the closed enclosure of the device, and this fluid is the cold source and its transition from the liquid state to the gaseous state is associated with expansion of the gas.
- a cryogenic fluid such as liquid nitrogen or liquid CO 2
- This liquefied gas vaporizes in the enclosure and must subsequently be evacuated from the machine to outside the production facility.
- the gases are made to flow actively.
- active extraction (fan, turbine, etc.) is installed on the tube and serves to draw the gases to the outside.
- active extraction is installed.
- This extraction consists of a fan installed in the extraction tube, an electricity supply and a control system which triggers operation when necessary.
- This whole assembly has a considerable cost in the total cost of the deep-freezing installation and, where possible, an installation without active extraction will always be preferred by the production site.
- the present invention has the object of proposing a technical solution which aims to dispense with the problem of the door seals of cryogenic cabinets, at negligible cost.
- the invention proposes using the fans that are in any case present in deep-freezing cabinets (the primary function of these fans is to agitate the air in the cabinet and thus contribute to the thermal exchange that occurs therein) such that they continue to perform this primary function but such that they also perform a function of active extraction of the gases to the outside.
- the proposed solution comprises a flap (the cost of this flap being negligible) which is located at the inlet of the extraction tube in the deep-freezing cabinet, this flap extending toward the interior of the cabinet and the shape, position and orientation of the flap making it possible to take advantage of the turbulence created by the fans.
- a flap the cost of this flap being negligible
- the turbulence created is redirected in part by the flap toward the extraction tube, thus pushing the gases toward the outside of the enclosure and thus creating a reduced pressure inside the deep-freezing enclosure.
- this flap will be chosen depending on the type of fan used in the cabinet and their direction (clockwise or counterclockwise) of operation.
- this flap must be studied so as to present minimum disruption to the deep-freezing process of the cabinet (studied for example by modelling or simply by testing on a real cabinet), in particular in order to verify that the flap provides the desired effect, which is to establish a reduced pressure within the cabinet, that the flap does not excessively disrupt the flow of air in the cell, and that it does not impair the coefficient of thermal transfer in the deep-freezing cabinet.
- the appended figures show four exemplary embodiments of these flaps, depending on whether the extraction is located at the bottom or at the top of the deep-freezing cabinet, and depending on whether the fans rotate in the clockwise or counterclockwise direction.
- FIG. 1 shows (in the left-hand view, extraction tube not equipped with a flap) that the turbulence created by the fans passes in front of the inlet to the extraction tube (located in the lower portion of the cabinet) whereas, with the aid of the flap positioned at the inlet to the extraction tube towards the interior of the deep-freezing cabinet (middle view), at least part of the turbulence enters the inlet of the extraction tube (right-hand view).
- the flap is in the form of a “folder” or “scoop”.
- FIG. 2 shows (in the left-hand view, extraction tube not equipped with a flap) that, here too, the turbulence created by the fans passes in front of the inlet to the extraction tube and, with the aid of the flap positioned at the inlet to the extraction tube towards the interior of the deep-freezing cabinet (middle view), at least part of the turbulence enters the inlet of the extraction tube (right-hand view).
- the flap is in the form of a “folder” or “scoop”.
- FIG. 3 shows a situation of clockwise operation of the fans, and in which the extraction is located at the top of the deep-freezing cabinet.
- the flap positioned at the inlet to the extraction tube towards the interior of the deep-freezing cabinet (middle view), at least part of the turbulence enters the inlet of the extraction tube (right-hand view).
- the flap is in the form of a truncated cylinder.
- FIG. 4 shows a situation of counterclockwise operation of the fans, and in which the extraction is again located at the top of the deep-freezing cabinet.
- the flap positioned at the inlet to the extraction tube towards the interior of the deep-freezing cabinet (middle view), at least part of the turbulence enters the inlet of the extraction tube (right-hand view).
- the flap is in the form of an “elbow tube”.
- the invention relates to a cabinet used for deep-freezing or storing food, medical or biological products, using a cryogenic fluid as cooling liquid, said cabinet being of the type that is:
- a flap located on said wall, at the point where the extraction tube enters the cabinet, and extending into the cabinet, the shape, position and orientation of said flap making it possible to divert, toward the extraction tube, all or part of the turbulence created by the or said convection fans.
- “Comprising” in a claim is an open transitional term which means the subsequently identified claim elements are a nonexclusive listing i.e. anything else may be additionally included and remain within the scope of “comprising.” “Comprising” is defined herein as necessarily encompassing the more limited transitional terms “consisting essentially of” and “consisting of”; “comprising” may therefore be replaced by “consisting essentially of” or “consisting of” and remain within the expressly defined scope of “comprising”.
- Providing in a claim is defined to mean furnishing, supplying, making available, or preparing something. The step may be performed by any actor in the absence of express language in the claim to the contrary.
- Optional or optionally means that the subsequently described event or circumstances may or may not occur.
- the description includes instances where the event or circumstance occurs and instances where it does not occur.
- Ranges may be expressed herein as from about one particular value, and/or to about another particular value. When such a range is expressed, it is to be understood that another embodiment is from the one particular value and/or to the other particular value, along with all combinations within said range.
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)
Applications Claiming Priority (3)
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 |
FR1650248 | 2016-01-13 | ||
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 (1)
Publication Number | Publication Date |
---|---|
US20190017738A1 true US20190017738A1 (en) | 2019-01-17 |
Family
ID=55806530
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US16/069,572 Abandoned US20190017738A1 (en) | 2016-01-13 | 2017-01-10 | System allowing automatic extraction of cold gases in a freezer cabinet operating with a cryogenic fluid |
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 ES ES17702424T patent/ES2965038T3/es active Active
- 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 PT PT177024247T patent/PT3403037T/pt unknown
- 2017-01-10 EP EP17702424.7A patent/EP3403037B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
PT3403037T (pt) | 2023-12-07 |
FR3046668B1 (fr) | 2018-02-16 |
FR3046668A1 (fr) | 2017-07-14 |
EP3403037A1 (fr) | 2018-11-21 |
ES2965038T3 (es) | 2024-04-10 |
EP3403037B1 (fr) | 2023-10-18 |
WO2017121951A1 (fr) | 2017-07-20 |
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