US3914953A - Cryogenic fragmentation freezer - Google Patents

Cryogenic fragmentation freezer Download PDF

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Publication number
US3914953A
US3914953A US465799A US46579974A US3914953A US 3914953 A US3914953 A US 3914953A US 465799 A US465799 A US 465799A US 46579974 A US46579974 A US 46579974A US 3914953 A US3914953 A US 3914953A
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United States
Prior art keywords
tunnel
articles
gas
freezer
refrigerant
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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.)
Expired - Lifetime
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US465799A
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English (en)
Inventor
Keith A Miller
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Air Products and Chemicals Inc
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Air Products and Chemicals Inc
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Filing date
Publication date
Application filed by Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
Priority to US465799A priority Critical patent/US3914953A/en
Priority to CA215,077A priority patent/CA1007877A/en
Priority to JP14243274A priority patent/JPS5312699B2/ja
Priority to DE19742459946 priority patent/DE2459946A1/de
Priority to AT1025174A priority patent/AT333320B/de
Priority to GB1977/75A priority patent/GB1495024A/en
Priority to NL7501015A priority patent/NL7501015A/xx
Priority to FR7512669A priority patent/FR2269689B1/fr
Priority to BE155859A priority patent/BE828484A/fr
Application granted granted Critical
Publication of US3914953A publication Critical patent/US3914953A/en
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C19/00—Other disintegrating devices or methods
    • B02C19/18—Use of auxiliary physical effects, e.g. ultrasonics, irradiation, for disintegrating
    • B02C19/186—Use of cold or heat for disintegrating
    • 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 substantially reduces the loss of cold refrigerant gas from the ends of the tunnel by the use of particular types of gas curtains; establishes an effectively controlled net flow of the cold gas in contact with the articles to be embrittled using variable direction fans; provides one or more internal gas curtains which divide the tunnel into distinct temperature zones, as well as, vaporizing the cryogenic liquid which may become trapped in the bottom of the freezer; and provides a novel structural form of the tunnel capable of withstanding the size and weight of the large articles while also providing a highly effective insulation system which can be readily removed for access to the tunnel interior.
  • FIG. I is a top vie of the tunnel
  • FIG. 2 is a side elevational view. partly in Crosssection, showing the essential components of the k m brittlement tunnel in simplified form:
  • FIG. 3 is an enlarged cross-sectional view of the Iun nel taken along view line 33 of FIG. 2;
  • FIG. 4 is a cross-sectional view taken along vie line 4-4 of FIG. 2 showing certain details of the inlet end of the tunnel;
  • FIG. 5 is an enlarged. fragmentary view taken along view line 5-5 of FIG. 4;
  • FIG. 6 is an enlarged. fragmentary view taken along view line 6-6 of FIG. 2;
  • FIG. 7 is a fragmentary, side elevational view taken along view line 77 of FIG. 6;
  • FIG. 8 is a fragmentary perspective view showing the construction details of the conveyor belt.
  • the embrittlement freezer generally indicated by numeral 10 is formed by a rigid framework of fiberglass I-beams ll which are connected to the base 12 and extend upwardly with their top portions secured by transverse angle members 13.
  • the l-beams ll carry angle brackets 14 which support upper and lower pairs of L-shaped conveyor support rails 15 which may be provided with suitable low friction coatings or strips 15' to reduce the friction of the long and heavy reaches of conveyor belt 16.
  • the conveyor belt 16 is preferably of the type known as an apron conveyor having a plurality of Vshaped plates 17 forming "pans" the sides of which are closed by apron plates 18.
  • the V-shapcd pans are hinged together and the conveyor belt includes chain links 19 which ride on the low friction strips 15.
  • the chain links engage the sprocket of a conventional motordrive assembly 20 located at the product outlet end of the freezer shown at the right-hand portion of FIGS. 1 and 2.
  • the tunnel housing is preferably formed of a plurality of modular, tongueand-groove panels each of which comprises two metal walls separated by four inches of urethane foam insulation.
  • the panels forming the bottom wall 21 are supported by cross-beams 22, while the panels forming the side walls 23 are removably secured to the bottom wall 21 and the top wall 24 by suitable locking mechanisms such as those more fully disclosed in U.S. Pat. No. 3,353,314.
  • the insulated tunnel housing does not carry any of the weight of the conveyor or the articles, and the side walls may be partially or completely removed in which event the top wall 24 rests on cross members 13.
  • a cryogenic liquid such as liquid nitrogen, or liquid carbon dioxide, or other cryogenic refrigerant having a normal boiling point below minus l00F.
  • a cryogenic liquid such as liquid nitrogen, or liquid carbon dioxide, or other cryogenic refrigerant having a normal boiling point below minus l00F.
  • the latent heat of the cryogenic liquid refrigerant is immediately utilized in cooling the articles such that the liquid is vaporized and becomes a cold gaseous refrigerant having a temperature equal to its normal boiling point or sublimation temperature, which is minus 320F. for liquid nitrogen and minus 109F. for liquid carbon dioxide, respectively.
  • a plurality of recirculation fan assemblies 30 are provided along the length of the tunnel in both the precooling zone, ahead of the spray zone, and in the postspray zone. While only three of such fan assemblies are illustrated in FIGS. 1 and 2, it will be understood that many more may be provided in actual practice and, since each recirculation fan assembly is identical, only one assembly will be described in detail.
  • the axial-flow fan blades 31 are driven by shafts 32 connected to motors 33 through speed reduction pulley-belt drives 34.
  • Each of the fans is surrounded by an adjustable position shroud ring 36 supported by four rods 38 having threaded lower ends to which the shroud rings are connected by adjusting nuts.
  • the angular position of the shroud rings may be varied from the horizontal plane to give the recirculating gas a forward component of velocity toward the inlet end of the freezer and thereby control the desired degree of net forward movement of the gas.
  • the preferred embodiment of the invention employs an air curtain assembly 40 as most clearly shown in FIGS. 1 and 2.
  • This assembly includes a pair of motor-driven centrifugal air blowers 42 which draw in ambient air and discharge the air through intermediate ducts 44 into a plenum chamber 46 which has a slot extending across the width of the bottom of the plenum chamber so as to direct a high velocity curtain of air downwardly across the exit opening of the tunnel as shown by flow arrow A.
  • An effective gas curtain is also provided at the front or loading end of the freezer as illustrated in FIGS. 1, 2, 4 and 5. While the air curtain previously described operates on the principle of discharging a high velocity stream from a plenum chamber, hereinafter described as a positive gas curtain, the gas curtain provided at the inlet end of the freezer does not discharge a high velocity gas stream across the opening, but rather, operates on a suction principle and will be subsequently described as a negative gas curtain
  • This negative gas curtain is created by a suction plenum chamber generally indicated by numeral 50 which is generally in the form of an inverted U-shaped chamber having an upper chamber portion and a pair of side chamber portions 52.
  • Plenum chamber 50 is formed of sheet metal and is entirely enclosed except for a pair of ports 53 and an inverted U-shaped suction slot generally indicated by numeral 54 which includes a horizontal portion 55 and a pair of side portions 56 with intervening webs of sheet metal to provide structural strength.
  • the suction slot 54 may be in the form of a plurality of circular or elongated apertures which collectively function as a single, U-shaped slot.
  • the inlet tunnel opening is surrounded on three sides by the suction slot 54 of the suction chamber 50.
  • Ports 53 of the suction chamber are connected by suitable ducts through heaters 57 to the inlets of a pair of motor-driven centrifugal blowers 58.
  • blowers 58 create a strong negative pressure in plenum chamber surrounding the tunnel inlet which creates a high velocity curtain of ambient air, indicated by flow arrow B, and refrigerant gas, indicated by flow arrow C, which flows through suction slot 54 into the plenum chamber 50, through ports 53, heaters 57 and blowers 58 to atmospheric discharge.
  • the negative pressure created at the product inlet end of the freezer assists in drawing the cold refrigerant gas forwardly from the spray zone in which it is generated in countercurrent heat exchange with the articles on the conveyor belt.
  • the suction slot 54 may be varied in width so as to vary the net flow of the cold gas toward the product inlet zone, while still maintaining an effective seal against the entrance of warm ambient air into the inlet end of the tunnel.
  • the adjustment of the suction slot 54 may be achieved in various ways, but is shown in FIG. 5 as comprising a slidable damper 59 which is slot-bolted, or otherwise secured, to the plenum chamber so as to be slidable and cover more or less of the width of the suction slot.
  • the slot may be in the form of a plurality of apertures, and it will be apparent that separate dampers may be used to individually control the flow through horizontal slot portion and that through the side slot portions 56.
  • heaters 57 are provided so that the mixture of air and refrigerant gas is maintained below the frost point such that frost does not clog blowers 58.
  • the heaters 57 may take any one of a number of forms such as electrical resistance coils surrounding the duct between plenum chamber 50 and blowers 58.
  • any other convenient source of heat may be utilized such as warm air, or warm water, circulated in indirect heat exchange with the mixture of air and refrigerant gas.
  • the plenum chamber 50 can be designed of a sufficient size so as to permit a degree of frost buildup without interfering with the flow of the gas mixture.
  • the present invention further includes the provision of auxiliary.
  • the heaters may take any number of forms, but are schematically illustrated as comprising electrical resistance coils in the side portions 52 and the upper portion 51 of the plenum chamber.
  • FIG. 60A shows the utilization of two such zone gas curtain assemblies generically indicated by numerals 60A and 608. Since the construction of both assemblies is substantially identical, the same numerals indicate corresponding components, and only one assembly will be described in detail.
  • a centrifugal blower 61 is mounted adjacent the top of the tunnel and is driven through a speed reduction unit compris ing a pulley and belt drive 62 connected to a motor 63.
  • the center intake of the blower is connected to a transversely extending duct 64 having pairs of ports 65 and 66.
  • Ports 66 communicate directly with the interior portion of the tunnel, while ports 65 communicate with ducts 67 which extend downwardly on opposite sides of the conveyor belt in the spaces between the l-beams 11.
  • Ports 65 and 66 are provided with closure plates 65' and 66', respectively, which may be manually operated by movement of rods 68 so as to open or close either of the ports of each pair.
  • cold refrigerant gas may be withdrawn from the upper portion of the tunnel, as shown by flow arrows D, and/or from the lower portions of the tunnel between and below the reaches of the conveyor as shown by flow arrows E and F in FIG. 7.
  • blower 61 is connected through a short coupling conduit 70, which may be a flexible hose, to a discharge duct 72 having a downwardly directed nozzle or slot 73 which extends across the full width of the freezer so as to direct a downward curtain of high velocity refrigerant gas as shown by flow arrows G.
  • Duct 72 is preferably supported from the cover 24 by a pivoted or hinged connector 74 and the angle of zone gas curtain G can be varied from the vertical direction by adjusting rod 75 so as to have a small forward or rearward component of velocity.
  • the internal zone gas curtain assemblies not only provide gas curtains which establish distinct temperature zones within the freezer so as to increase the rate of heat transfer, but also, they promote the circulation of gas below the solid conveyor belt so as to vaporize any cryogenic liquid in the bottom portions of the tunnel and efficiently utilize the refrigeration value of such otherwise trapped refrigerant in the high velocity gas contact with the articles on the conveyor belt.
  • the gas curtain G. of assembly 60A cooperates with the positive air curtain A so as to provide a short intermediate zone which acts as a dead space of substantially stationary gas having a temperature substantially colder than that of the ambient air, but warmer than that in the spray zone.
  • the combination of the two gas curtains and the dead space provide a highly efficient gas seal at the outlet end of the tunnel which prevents the very cold and dense gas from the spray zone from exiting the outlet end of the tunnel with substantial loss of thermal efficiency.
  • the zone gas curtains enable a slight positive, above atmospheric, pressure of cold refrigerant gas to be maintained in the tunnel so that air is excluded and the tunnel is completely filled with only the cold gaseous refrigerant.
  • the zone gas curtain of assembly 60A is preferably directed downwardly at a right angle to the conveyor belt so as to form a vertical gas curtain parallel with that of positive air curtain A
  • the zone gas curtain of assembly 608 is preferably adjusted by rod so as to have a forward component of velocity toward the inlet end ofthe freezer.
  • a cryogenic embrittlement freezer for cooling articles to their embrittlement temperature comprising an elongated, open-ended tunnel having insulated top. bottom and side walls, conveyor means extending through said tunnel for conveying articles to be embrittled from the open inlet end to the open outlet end, means for contacting said articles with a cryogenic liquid refrigerant and vaporizing a majority of said liquid refrigerant into a cold refrigerant gas, a plurality of fans mounted above said conveyor for recirculating said refrigerant gas in contact with the articles to be embrittled in a plurality of high velocity recirculation zones, means forming an air curtain at the outlet end of the tunnel for preventing the entrance of ambient air and the exit of cold refrigerant gas, means forming a suction plenum chamber at the inlet end of the freezer having an inverted U shaped suction slot surrounding the upper and side portions of said inlet, and blower means having a suction inlet connected to said plenum chamber for producing a negative gas curtain at the inlet of the tunnel
  • embrittlement freezer as claimed in claim 1 including heater means upstream of said blower means for preventing the formation of frost in said blower means.
  • embrittlement freezer as claimed in claim 2 including additional heater means in said suction plenum for preventing frost therein.
  • embrittlement freezer as claimed in claim 1 further including at least one internal gas curtain assembly for producing a gas curtain within said freezer
  • said gas curtain assembly including a blower having an inlet in communication with the interior of the tunnel to draw refrigerant gas into said blower. and discharge plenum means connected to the outlet of said blower for discharging a curtain of gaseous refrigerant perpendicular to the direction of movement of said conveyor means.
  • embrittlement freezer as claimed in claim 4 wherein said internal gas curtain assembly is positioned between said spray zone and said tunnel outlet for de fining a distinct zone of substantially stationary gas between said air curtain and said internal gas curtain.
  • embrittlement freezer as claimed in claim 4 wherein said internal gas curtain assembly is positioned between said spray zone and the tunnel inlet for defining at least two distinct zones of gas recirculation of substantially different temperatures.
  • a cryogenic scrap freezer for cooling articles to their embrittlement temperature comprising an elongated, open-ended tunnel having insulated top, bottom and side walls, a substantially solid apron conveyor belt extending through said tunnel for conveying articles from the inlet end to the outlet end, spray header means for spraying said articles with a cryogenic liquid refrigerant and vaporizing the major portion of said liquid refrigerant into a cold refrigerant gas by contact with the articles to be embrittled, a plurality of fans mounted above said apron conveyor for recirculating said refrigerant gas in contact with said articles in a plurality of high velocity recirculation zones, said conveyor belt including a plurality of hinged V-shaped pan sections for collecting excess liquid refrigerant not vaporized in said spray zone and vaporizing it between the spray zone and the outlet of the tunnel thereby providing liquid refrigerant for post-spray cooling of the articles.
  • a cryogenic embrittlement freezer for cooling articles to their embrittlement temperature comprising: a framework of l-beams, a plurality of modular insulated panels removably supported by said framework forming an elongated insulated tunnel housing, a conveyor belt supported by said framework, spray header means for spraying said articles to be embrittled with a cryogenic liquid refrigerant and vaporizing the major portion of said liquid refrigerant into a cold refrigerant gas, a plurality of fans mounted above said conveyor for recirculating said refrigerant gas in contact with said articles in a plurality of high velocity recirculation zones, said fans having axial flow fan blades, shroud rings surrounding said axial flow fan blades, and adjustment means for varying the angular position of said shroud rings from the horizontal plane so as to produce a forward component of velocity of the recirculating gas toward the inlet end of the tunnel.
  • the embrittlement freezer as claimed in claim 8 further including at least one internal gas curtain assembly for producing a gas curtain within said freezer, said gas curtain assembly including a blower having an inlet in communication with the interior of the tunnel to draw refrigerant gas into said blower, and discharge plenum means connected to the outlet of said blower for discharging a curtain of gaseous refrigerant perpendicular to the direction of movement of said conveyor means.
  • a cryogenic embrittlement tunnel for cooling articles to their embrittlement temperature comprising an elongated, open-ended tunnel having insulated top, bottom and side walls, a substantially solid conveyor belt extending through said tunnel for conveying articles from the inlet end to the outlet end, spray header means for spraying said articles with a cryogenic liquid refrigerant and vaporizing the major portion of said liquid refrigerant into a cold refrigerant gas by contact with the articles to be embrittled, a plurality of fans mounted above said conveyor for recirculating said refrigerant gas in contact with said articles in a plurality of high velocity recirculation zones, said conveyor belt including a plurality of hinged pan sections for collecting excess liquid refrigerant not vaporized in said spray zone and vaporizing it between the spray zone and the outlet of the tunnel thereby providing liquid refrigerant for post-spray cooling of the articles, and at least one internal gas curtain assembly, said assembly including blower means having a discharge above said solid conveyor and duct means having one end connected to the inlet of said
  • said internal gas curtain assembly further includes an adjustable position discharge duct, and means for adjusting the angle of the gas curtain discharged from said duct so as to have a forward component of velocity for promoting and controlling the net forward flow of refrigerant gas from the spray zone to the tunnel inlet.

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  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Disintegrating Or Milling (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
US465799A 1974-05-01 1974-05-01 Cryogenic fragmentation freezer Expired - Lifetime US3914953A (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
US465799A US3914953A (en) 1974-05-01 1974-05-01 Cryogenic fragmentation freezer
CA215,077A CA1007877A (en) 1974-05-01 1974-12-02 Cryogenic fragmentation freezer
JP14243274A JPS5312699B2 (fr) 1974-05-01 1974-12-11
DE19742459946 DE2459946A1 (de) 1974-05-01 1974-12-18 Vorrichtung zum versproeden von gegenstaenden
AT1025174A AT333320B (de) 1974-05-01 1974-12-20 Vorrichtung zum versproden von gegenstanden
GB1977/75A GB1495024A (en) 1974-05-01 1975-01-16 Cryogenic fragmentation freezer
NL7501015A NL7501015A (nl) 1974-05-01 1975-01-29 Cryogenische verbrokkelingsbevriezer.
FR7512669A FR2269689B1 (fr) 1974-05-01 1975-04-23
BE155859A BE828484A (fr) 1974-05-01 1975-04-28 Refrigerateur cryogenique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US465799A US3914953A (en) 1974-05-01 1974-05-01 Cryogenic fragmentation freezer

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US3914953A true US3914953A (en) 1975-10-28

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US465799A Expired - Lifetime US3914953A (en) 1974-05-01 1974-05-01 Cryogenic fragmentation freezer

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Country Link
US (1) US3914953A (fr)
JP (1) JPS5312699B2 (fr)
AT (1) AT333320B (fr)
BE (1) BE828484A (fr)
CA (1) CA1007877A (fr)
DE (1) DE2459946A1 (fr)
FR (1) FR2269689B1 (fr)
GB (1) GB1495024A (fr)
NL (1) NL7501015A (fr)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175396A (en) * 1978-05-19 1979-11-27 Air Products And Chemicals, Inc. Cryogenic embrittlement freezer with gas lock
US4316580A (en) * 1979-07-13 1982-02-23 Sontek Industries, Inc. Apparatus for fragmenting fluid fuel to enhance exothermic reactions
US4347983A (en) * 1979-01-19 1982-09-07 Sontek Industries, Inc. Hyperbolic frequency modulation related to aero/hydrodynamic flow systems
EP0135106A2 (fr) * 1983-08-09 1985-03-27 Air Products And Chemicals, Inc. Procédé pour frigorifier des produits se servissant du contact avec le liquide frigorique et installation frigorifique
US4584849A (en) * 1985-01-17 1986-04-29 Cloudy & Britton, Inc. Food freezing tunnel
FR2595130A1 (fr) * 1985-11-13 1987-09-04 Serap Dev Enceinte susceptible de resister a d'importantes differences de temperature entre sa partie interne et sa partie externe, notamment tunnel de congelation
US5444985A (en) * 1994-05-13 1995-08-29 Liquid Carbonic Corporation Cryogenic tunnel freezer
US5456085A (en) * 1994-03-07 1995-10-10 Popp; James L. Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
US5577392A (en) * 1995-01-17 1996-11-26 Liquid Carbonic Corporation Cryogenic chiller with vortical flow
US5606860A (en) * 1994-03-07 1997-03-04 Popp; James L. Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
US5887750A (en) * 1994-03-07 1999-03-30 James L. Popp Commodity container
EP0964213A3 (fr) * 1998-06-08 2000-04-19 Praxair Technology, Inc. Procédé et dispositif pour retenir un fluide frigorigène dans une enceinte frigorifique
EP1184633A1 (fr) * 2000-09-01 2002-03-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tunnel cryogénique de réfrigération de produits, notamment alimentaires
US6477845B1 (en) * 1999-02-03 2002-11-12 Ruben Larsson Apparatus for air treatment and transportation of a material
US20100139293A1 (en) * 2008-06-19 2010-06-10 Yamil Adiv Maccise Sade Ultrafast food freezing equipment by direct contact with dosed liquid nitrogen
US20100162732A1 (en) * 2008-12-30 2010-07-01 Linde, Inc. Cooling or Freezing Apparatus Using High Heat Transfer Nozzle
FR2950683A1 (fr) * 2009-09-25 2011-04-01 Cims Installation de refroidissement de produits comprenant un tunnel au travers duquel les produits sont amenes a defiler, un rideau d'air froid etant genere en entree du tunnel
WO2019036574A1 (fr) * 2017-08-18 2019-02-21 Linde Aktiengesellschaft Congélateur d'aliments avec évacuation interne
CN113415644A (zh) * 2021-06-08 2021-09-21 东台市良友机械有限公司 一种带破碎功能的给料机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56117065A (en) * 1980-02-16 1981-09-14 Hoshino Hiroshi Rapid cooling device
DE4318566A1 (de) * 1993-06-04 1994-12-08 Lentjes Kraftwerkstechnik Verfahren zur Verwertung organische Bestandteile enthaltender Abfallstoffe durch autotherme Vergasung

Citations (5)

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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
US3434301A (en) * 1968-02-09 1969-03-25 Union Carbide Corp Food product cryogenic freezing system
US3455120A (en) * 1966-09-08 1969-07-15 Chemetron Corp Cryogenic conveyor freezer
US3472570A (en) * 1967-02-14 1969-10-14 Bramlett Mfg Corp Modular insulated freezer tunnel and construction method
US3533245A (en) * 1968-11-14 1970-10-13 Harold L Komberec Gas lock for openings in pressurized chambers

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
US3455120A (en) * 1966-09-08 1969-07-15 Chemetron Corp Cryogenic conveyor freezer
US3472570A (en) * 1967-02-14 1969-10-14 Bramlett Mfg Corp Modular insulated freezer tunnel and construction method
US3434301A (en) * 1968-02-09 1969-03-25 Union Carbide Corp Food product cryogenic freezing system
US3533245A (en) * 1968-11-14 1970-10-13 Harold L Komberec Gas lock for openings in pressurized chambers

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4175396A (en) * 1978-05-19 1979-11-27 Air Products And Chemicals, Inc. Cryogenic embrittlement freezer with gas lock
EP0005926A2 (fr) * 1978-05-19 1979-12-12 Air Products And Chemicals, Inc. Réfrigérateur cryogénique et procédé pour sa mise en oeuvre
EP0005926A3 (en) * 1978-05-19 1980-01-09 Air Products And Chemicals, Inc. Cryogenic freezer and method of operating the same
US4347983A (en) * 1979-01-19 1982-09-07 Sontek Industries, Inc. Hyperbolic frequency modulation related to aero/hydrodynamic flow systems
US4316580A (en) * 1979-07-13 1982-02-23 Sontek Industries, Inc. Apparatus for fragmenting fluid fuel to enhance exothermic reactions
EP0135106A2 (fr) * 1983-08-09 1985-03-27 Air Products And Chemicals, Inc. Procédé pour frigorifier des produits se servissant du contact avec le liquide frigorique et installation frigorifique
EP0135106A3 (en) * 1983-08-09 1985-11-13 Air Products And Chemicals, Inc. Dual flow cryogenic freezer
US4584849A (en) * 1985-01-17 1986-04-29 Cloudy & Britton, Inc. Food freezing tunnel
FR2595130A1 (fr) * 1985-11-13 1987-09-04 Serap Dev Enceinte susceptible de resister a d'importantes differences de temperature entre sa partie interne et sa partie externe, notamment tunnel de congelation
US5887750A (en) * 1994-03-07 1999-03-30 James L. Popp Commodity container
US5456085A (en) * 1994-03-07 1995-10-10 Popp; James L. Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
US5606860A (en) * 1994-03-07 1997-03-04 Popp; James L. Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
US5761912A (en) * 1994-03-07 1998-06-09 Popp; James L. Process and apparatus for cryogenically cleaning residue from containers and reducing the bulk volume thereof
US6145323A (en) * 1994-03-07 2000-11-14 James L. Popp Process and apparatus for cryogenically cleaning residue from containers
US5444985A (en) * 1994-05-13 1995-08-29 Liquid Carbonic Corporation Cryogenic tunnel freezer
US5577392A (en) * 1995-01-17 1996-11-26 Liquid Carbonic Corporation Cryogenic chiller with vortical flow
EP0964213A3 (fr) * 1998-06-08 2000-04-19 Praxair Technology, Inc. Procédé et dispositif pour retenir un fluide frigorigène dans une enceinte frigorifique
US6477845B1 (en) * 1999-02-03 2002-11-12 Ruben Larsson Apparatus for air treatment and transportation of a material
FR2813661A1 (fr) * 2000-09-01 2002-03-08 Air Liquide Tunnel cryogenique de refrigeration de produits, notamment alimentaires
EP1184633A1 (fr) * 2000-09-01 2002-03-06 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Tunnel cryogénique de réfrigération de produits, notamment alimentaires
US6553781B2 (en) 2000-09-01 2003-04-29 L'air Liquide Societe Anonyme A Directoire Et Conseil De Surveillance Pour L'etude Et L'exploitation Des Procedes Georges Claude Cryogenic tunnel for chilling products, especially food products
US20100139293A1 (en) * 2008-06-19 2010-06-10 Yamil Adiv Maccise Sade Ultrafast food freezing equipment by direct contact with dosed liquid nitrogen
US20100162732A1 (en) * 2008-12-30 2010-07-01 Linde, Inc. Cooling or Freezing Apparatus Using High Heat Transfer Nozzle
US7992393B2 (en) * 2008-12-30 2011-08-09 Linde Aktiengesellschaft Cooling or freezing apparatus using high heat transfer nozzle
FR2950683A1 (fr) * 2009-09-25 2011-04-01 Cims Installation de refroidissement de produits comprenant un tunnel au travers duquel les produits sont amenes a defiler, un rideau d'air froid etant genere en entree du tunnel
EP2312243A1 (fr) * 2009-09-25 2011-04-20 C.I.M.S. Installation de refroidissement de produits comprenant un tunnel au travers duquel les produits sont amenés à défiler, un rideau d'air froid étant généré en entrée de tunnel
WO2019036574A1 (fr) * 2017-08-18 2019-02-21 Linde Aktiengesellschaft Congélateur d'aliments avec évacuation interne
CN113415644A (zh) * 2021-06-08 2021-09-21 东台市良友机械有限公司 一种带破碎功能的给料机

Also Published As

Publication number Publication date
AT333320B (de) 1976-11-10
ATA1025174A (de) 1976-03-15
JPS50141753A (fr) 1975-11-14
BE828484A (fr) 1975-08-18
DE2459946A1 (de) 1975-11-13
JPS5312699B2 (fr) 1978-05-02
FR2269689A1 (fr) 1975-11-28
NL7501015A (nl) 1975-11-04
FR2269689B1 (fr) 1977-11-25
GB1495024A (en) 1977-12-14
CA1007877A (en) 1977-04-05

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