EP3343140A1 - Appareil de refroidissement ou/de congélation de produits - Google Patents

Appareil de refroidissement ou/de congélation de produits Download PDF

Info

Publication number: EP3343140A1
Authority: EP; European Patent Office
Prior art keywords: belt; housing; flow; zone; freezer
Prior art date: 2016-12-28
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

Application number

EP17173701.8A

Other languages

German (de)

English (en)

Other versions

EP3343140B1 (fr

Inventor

Michael D. Newman

Stephen A. Mccormick

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Linde GmbH

Original Assignee

Linde GmbH

Priority date (The priority date 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 date listed.)

2016-12-28

Filing date

2017-05-31

Publication date

2018-07-04

2017-05-31 Application filed by Linde GmbH filed Critical Linde GmbH

2018-07-04 Publication of EP3343140A1 publication Critical patent/EP3343140A1/fr

2022-03-02 Application granted granted Critical

2022-03-02 Publication of EP3343140B1 publication Critical patent/EP3343140B1/fr

Status Not-in-force legal-status Critical Current

2037-05-31 Anticipated expiration legal-status Critical

Links

230000008014 freezing Effects 0.000 title description 2
238000007710 freezing Methods 0.000 title description 2
238000000034 method Methods 0.000 claims abstract description 22
239000012530 fluid Substances 0.000 claims abstract description 10
238000004891 communication Methods 0.000 claims abstract description 3
235000013305 food Nutrition 0.000 claims description 5
238000010276 construction Methods 0.000 claims description 3
230000001419 dependent effect Effects 0.000 description 2
238000012986 modification Methods 0.000 description 2
230000004048 modification Effects 0.000 description 2
238000005243 fluidization Methods 0.000 description 1

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
- 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
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- 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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/06—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation
- F25D2317/063—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass with forced air circulation with air guides
- 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
- F25D2500/00—Problems to be solved
- F25D2500/02—Geometry problems

Definitions

the present invention relates an apparatus for chilling and/or freezing at least one product, in particular at least one food product; more particularly, the present invention relates to a cryogenic freezer apparatus; even more particularly, the present invention relates to a fluidized bed freezer.
the present invention further relates a corresponding method.
Known cryogenic fluidized bed freezers utilize blowers to pressurize a bed of the freezer, and to provide gas flow to drive heat transfer from the product to the gas.
the known blowers are offset to a side of the fluidized bed zone of the freezer.
blowers force the gas downward, where the gas impacts and is driven across the floor of the freezer whereupon the gas then impacts a sidewall of the freezer to then be turned upward and through the fluid bed belt transporting the product.
baffles are positioned below the bed, but this baffle placement causes pressure drop in the freezer and therefore, more power is required to drive the blowers to maintain acceptable heat transfer rates.
fluidization velocity is limited to no more than approximately 1000 feet per minute (being approximately 5.08 meter per second) in order to prevent and at least minimize product carry-over into the blower zone when peak velocities are used.
an object of the present invention is to overcome the limitations and problems that earlier apparatus and methods have experienced.
a cryogenic fluidized bed freezer with gas flow path namely a cryogenic freezer apparatus embodiment which includes a housing; a fluidized bed belt movable within the housing; a shroud positioned within the housing for providing a zone above the belt, the shroud angled outward from the belt within the housing; and a least one blower positioned within the housing in fluid communication with the zone and centrally located above the zone and the shroud.
Another advantageous embodiment of the apparatus may include the belt comprising a first width within the housing, and the zone may comprise a second width within the housing greater than the first width.
Another expedient embodiment of the apparatus may include the second width being twice as wide as the first width.
Another favoured embodiment of the apparatus may include the shroud angled outward fifteen degrees from the belt.
Another preferred embodiment of the apparatus may further include a divider, in particular a belt divider, positioned below the belt for guiding gas flow to the belt.
a divider in particular a belt divider
Another advantageous embodiment of the apparatus may include the housing comprising an inner surface having a construction which may direct gas flow within the housing to an underside of the belt.
a method embodiment of moving cryogenic gas to a fluidized bed belt in a freezer which includes shrouding a zone within the freezer having a first pressure above the belt; positioning at least one blower centrally located above the zone and the belt; directing a flow of cryogenic gas from the at least one blower to an underside of the belt at a second pressure greater than the first pressure; and moving the flow of cryogenic gas through the belt into the zone.
Another expedient embodiment of the method may further include reducing a velocity of the flow upon the flow entering into the zone from the belt.
Another favoured embodiment of the method may further include comprising angling outward the flow upon entry into the zone for the reducing of the velocity of the flow.
Another preferred embodiment of the method further may include directing the flow of cryogenic gas with an interior surface of the freezer toward the underside of the belt.
Another advantageous embodiment of the method further may include dividing the flow of the cryogenic gas at the underside of the belt before moving the flow through the belt.
Another expedient embodiment of the method may include the moving the flow of the cryogenic gas through the belt being at a substantially constant velocity throughout a length and width of the belt.
the apparatus according to the present invention as well as the method according to the present invention may be used to chill and/or to freeze at least one product, in particular at least one food product.
FIG. 1 An improved flow pattern can be seen in the attached schematic of FIG. 1 for the present cryogenic fluidized bed freezer apparatus embodiment 10 that will provide a more even and uniform gas flow and velocity to the bed by placing the blowers centered and directly above the fluid bed zone.
Such an arrangement provides higher fluid bed velocities in the bed by doubling cross-sectional area above the fluid bed zone and therefore, reducing by one half a velocity in the zone which will prevent product carry-over, prevent lower pressure drop throughout the system and thereby reduce specific blower power and improving system efficiency.
the cryogenic fluidized bed freezer 10 of the present embodiments includes a housing 12, a fluidized bed belt 14 with a width BW, and a shroud 16 attached above the belt 14 that angles outward 17 at fifteen degrees on both sides of the belt 14 to a width of 2 x BW in order to provide a zone 18 above the belt 14 wherein a velocity of one-half that of the velocity through the fluidized bed belt 14 in order to prevent carry-over of a product, in particular of a food product, into the blower area.
Blowers 20 are mounted centrally above the fluidized bed shroud 16, so that half of the flow generated is sent to each side of the fluidized bed providing a substantially constant velocity throughout the bed length and width.
An inner surface 13 of the housing 12 also directs the gas flow 22 to an underside 24 of the belt 14.
a belt divider 26 and gas flow guide 28 are mounted below the fluid bed belt 14 to provide uniform and constant gas flow and velocity across the fluid bed zone.

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)

EP17173701.8A 2016-12-28 2017-05-31 Appareil de refroidissement ou/de congélation de produits Not-in-force EP3343140B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US201662439537P	2016-12-28	2016-12-28

Publications (2)

Publication Number	Publication Date
EP3343140A1 true EP3343140A1 (fr)	2018-07-04
EP3343140B1 EP3343140B1 (fr)	2022-03-02

Family

ID=58873738

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP17173701.8A Not-in-force EP3343140B1 (fr)	2016-12-28	2017-05-31	Appareil de refroidissement ou/de congélation de produits

Country Status (2)

Country	Link
EP (1)	EP3343140B1 (fr)
WO (1)	WO2018125688A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1515509A (en) *	1975-07-24	1978-06-28	Jowitt R	Quick freezing of foods
EP2269474A2 (fr) *	2009-07-01	2011-01-05	Linde Aktiengesellschaft	Procédé et appareil pour congélation ultrasonique
FR2979421A1 (fr) *	2011-08-30	2013-03-01	Air Liquide	Procede et dispositif de refroidissement cryogenique de produits dans un tunnel

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4229947A (en) *	1979-08-06	1980-10-28	Air Products And Chemicals, Inc.	Cryogenic freezer
US5444985A (en) *	1994-05-13	1995-08-29	Liquid Carbonic Corporation	Cryogenic tunnel freezer
US20100319365A1 (en) *	2007-11-27	2010-12-23	Newman Michael D	Cross flow tunnel freezer system
US9644883B2 (en) *	2012-10-04	2017-05-09	GEA Refrigeration Canada, Inc	Fluidized bed conveyor belt freezer system
US8904811B2 (en) *	2012-11-15	2014-12-09	Linde Aktiengesellschaft	Baffle controlled oscillating flow freezer

2017
- 2017-05-31 EP EP17173701.8A patent/EP3343140B1/fr not_active Not-in-force
- 2017-12-20 WO PCT/US2017/067476 patent/WO2018125688A1/fr not_active Ceased

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
GB1515509A (en) *	1975-07-24	1978-06-28	Jowitt R	Quick freezing of foods
EP2269474A2 (fr) *	2009-07-01	2011-01-05	Linde Aktiengesellschaft	Procédé et appareil pour congélation ultrasonique
FR2979421A1 (fr) *	2011-08-30	2013-03-01	Air Liquide	Procede et dispositif de refroidissement cryogenique de produits dans un tunnel

Also Published As

Publication number	Publication date
WO2018125688A1 (fr)	2018-07-05
EP3343140B1 (fr)	2022-03-02

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US7827818B2 (en)	2010-11-09	Conveyor belt having rotating drive shaft
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