EP2283285A2 - Tunnel de refroidissement et procédé d'utilisation de celui-ci - Google Patents

Tunnel de refroidissement et procédé d'utilisation de celui-ci

Info

Publication number
EP2283285A2
EP2283285A2 EP09734359A EP09734359A EP2283285A2 EP 2283285 A2 EP2283285 A2 EP 2283285A2 EP 09734359 A EP09734359 A EP 09734359A EP 09734359 A EP09734359 A EP 09734359A EP 2283285 A2 EP2283285 A2 EP 2283285A2
Authority
EP
European Patent Office
Prior art keywords
cooling
conveyor
section
objects
cooling tunnel
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
Application number
EP09734359A
Other languages
German (de)
English (en)
Other versions
EP2283285B1 (fr
Inventor
Stefan Hummrich
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.)
airinotec GmbH
Original Assignee
airinotec 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.)
Filing date
Publication date
Application filed by airinotec GmbH filed Critical airinotec GmbH
Priority to PL09734359T priority Critical patent/PL2283285T3/pl
Publication of EP2283285A2 publication Critical patent/EP2283285A2/fr
Application granted granted Critical
Publication of EP2283285B1 publication Critical patent/EP2283285B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F25D25/00—Charging, supporting, and discharging the articles to be cooled
    • F25D25/04—Charging, supporting, and discharging the articles to be cooled by conveyors
    • 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
    • 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
    • F25D2317/065—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 characterised by the air return
    • F25D2317/0655—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 characterised by the air return through the top
    • 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
    • F25D2317/066—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 characterised by the air supply
    • F25D2317/0664—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 characterised by the air supply from the side

Definitions

  • the invention relates to a cooling tunnel, comprising an introducer sluice for introducing objects to be cooled, a discharge sluice for discharging objects, a plurality of successive treatment positions for applying the objects to be cooled with a cooling medium, in particular cooling air, and a conveyor for transporting the cooling articles from the introducer sheath to the exit sheath, the conveyer passing through the individual treatment positions. Furthermore, the invention relates to a method for operating a cooling tunnel.
  • Cooling tunnels of the aforementioned type are known from US 2,474,069 A and DE 100 17 408 Al.
  • the objects to be cooled for example milk products stacked on pallets, are conveyed continuously from the treatment position to the treatment position in the known cooling tunnels by means of a conveyor and are cooled by lateral injection of cooling air.
  • EP 1 455 151 B1 proposes a discontinuous cooling tunnel.
  • the individual treatment positions branch off from a main funding path.
  • Each object is transported with the conveyor before the respective treatment position and stored there. After sufficient cooling of the article this is returned to the conveyor and transported on.
  • each article can be treated according to its individual cooling time and then discharged with the conveyor from the cooling area.
  • such a configuration is complicated because a corresponding transport mechanism is required for each branch from the main conveying path to a treatment position.
  • a relatively large footprint is required because the main conveyor to reach the individual treatment positions must always be kept free.
  • the invention has the object to provide a cooling tunnel that allows for variable target cooling times a high throughput.
  • the cooling tunnel according to claim 1 is characterized in particular in that the conveying device has a first section passing through several treatment positions and extending from the introducer sheath to a reversal position, a second portion passing through a plurality of treatment positions extending from the reversing position to the discharge gate, and a return portion disposed in front of the discharge gate connecting an outgoing side portion of the second portion to an insertion side portion of the first portion to selectively discharge or advance items cool.
  • the conveyor allows with the first and second sections and the return section a circulation for the objects to be cooled, with the return section in front of the discharge lock a switch is provided, which makes it possible to coincideschleusen sufficiently cooled items, but not enough cooled items to continue to cool ,
  • the conveyor can be controlled so that a feed is only made if it is necessary for discharging finished-cooled objects or to change the treatment position.
  • the first and second sections of the conveyor are arranged side by side in a common treatment room, wherein Ausström Schle are for supplying cooling medium to the individual treatment positions on opposite side walls of the treatment room.
  • Ausström Symposiume are for supplying cooling medium to the individual treatment positions on opposite side walls of the treatment room.
  • an air outlet between the first and second sections of the conveyor, whereby a good air flow to the objects to be cooled and thus a high cooling effect is achieved.
  • the second section of the conveying device can connect directly to the first section of the conveying device at the reversing position, it being possible for means to be provided in order to maintain the original orientation of the objects to be cooled.
  • a transfer device for transferring objects from the first section of the conveyor to the second section of the conveyor is arranged at the reversing position, whereby a parallel arrangement of the first and second sections is made possible with a small distance. The footprint of the cooling tunnel remains so low.
  • first portion and the second portion of the conveyor may have separately drivable portions, wherein at the end of each portion of the first portion, a transfer device for transferring objects to the second portion is arranged.
  • a transfer device for transferring objects to the second portion is arranged at the end of each portion of the first portion.
  • Separately controllable outflow regions for supplying cooling medium are preferably assigned to the subregions. This allows the cooling tunnel to be adapted to varying throughput quantities. For example, with low throughputs Partial areas are switched off and accordingly energy is saved. This is further promoted by arranging the sections in separate treatment rooms, which are separated from each other by bulkheads. Furthermore, it is possible to realize different cooling processes by means of an air technology separate for the subregions.
  • the first section of the conveyor at least in a subsequent to the introducer sheath portion for each treatment position on an individually controllable single-user drive.
  • the objects to be cooled can be dammed up in this area.
  • a further promotion takes place only if necessary. This can reduce the number of product movements.
  • the energy efficiency can thus be optimized in particular in the case of a cooling tunnel consisting of several partial areas with low throughput quantities by superfluous partial areas being switched off by concentrating on the one or more partial areas.
  • the cooling tunnel according to the invention preferably further comprises a control device for controlling the individual sections of the conveyor as well as possibly existing section sections.
  • the control device is configured such that a time account for the required target cooling time is assigned to each item introduced. Based on the cooling time account and the operation of the conveyor, the position of each item can be determined. If it is determined in the control device that an object is located in front of the return section, it is checked whether its cooling time account has expired. If this is the case, the object in question is ejected by operating the second section. Otherwise, the article is transferred to the first section of the conveyor by operation of the return section. As a result, a fully automatic operation of the cooling tunnel can be realized.
  • control device In the presence of a plurality of reversing positions can be further determined via the control device, whether for a particular object of the conveying path should be abbreviated.
  • the control device transmits a corresponding signal to the relevant transfer device.
  • a decision logic suitable for this purpose is stored, with which it is checked whether the object is to be transferred to the second section or to stay in the first section.
  • the invention further provides a method for operating a cooling tunnel according to claim 12, which is particularly suitable for the operation of the above-described cooling tunnel.
  • the method according to the invention relates to a cooling tunnel with a circulation conveyor running through successive treatment positions, as well as an introducer sheath and a discharge sheath.
  • objects with different desired cooling times are subsequently transferred to the circulation conveyor via the introducer sheath.
  • Each item is assigned a time account with a target cooling time, on which the accumulated dwell time in the cooling tunnel is recorded. If an item reaches a position in front of the exit lock, the cooling time account is used to decide whether the item is to be dispensed through the exit lock or remains on the circulating conveyor. Expires the target cooling time while staying in the cooling tunnel, an execution of the subject matter is caused, with possibly upstream objects for which the target cooling time has not expired, are passed by the exit lock.
  • the dwell times for different feed directions of cooling medium are recorded separately on the cooling time account. As a result, a more uniform cooling can be achieved.
  • the method according to the invention can be modified in such a way that it is decided on the basis of the cooling time account of several objects whether an article passes through the abbreviation branch or not.
  • articles with a shorter target cooling time can be passed through the cooling tunnel more quickly, while at least a portion of the articles with higher residual cooling times need not be moved or at least less frequently.
  • FIG. 1a is a schematic view of a first exemplary embodiment of a cooling tunnel according to the invention
  • FIG. 1 b shows a schematic view of a second exemplary embodiment of a cooling tunnel according to the invention
  • FIG. 2 shows a schematic view of a third exemplary embodiment of a modified cooling tunnel with a plurality of partial regions
  • FIG. 3 shows a view from above of the conveying device of a cooling tunnel according to FIG. 2,
  • FIG. 4 shows a sectional view transversely to the conveying direction of a first and a second section of the conveying device of the cooling tunnel according to FIG. 3, and in FIG.
  • Figure 5 is a representation of the sequence of the method according to the invention.
  • cooling tunnel 1 for cooling objects 10 such as dairy products and the like by means of a cooling medium.
  • the articles 10 are stacked on pallets 11, which are flowed at different treatment positions within the cooling tunnel 1 with cooling air.
  • the cooling tunnel 10 shown in FIG. 1a has a treatment space 20 separated from the outside environment. Within the treatment room 20 are several consecutive treatment positions 21.1 to 21.8, in which the on the pallets 11 stacked objects 10 are transported by means of a conveyor 30 before. At the treatment positions 21.1 to 21.8 are outflow areas 22.1 to 22.8 for applying the objects to be cooled 10 with cooling medium.
  • an introducer sluice 23 to be cooled objects are introduced into the treatment chamber 20 and passed to the conveyor 30. Furthermore, a discharge lock 24 is provided, via which the articles 10 are led out of the cooling tunnel 1 after treatment with cooling medium.
  • the conveyor 30 is arranged such that it passes through the successive treatment positions 21.1 to 21.8, whereby in the embodiment shown in Figure 1, each object to be cooled 10 passes through all treatment positions 21.1 to 21.8. However, this does not automatically mean that each article 10 to be cooled must remain at each treatment position 21.1 to 21.8 for an equal time interval. Rather, the feed of the conveyor 30 can be adjusted flexibly, so that different residence times result for the objects 10 at individual treatment positions, as will be explained in more detail below.
  • the conveyor 30 has first section 31 and a second section 32, which are delimited by a reversing position 33 against each other. Each section passes through multiple treatment positions 21.1 to 21.4 and 21.5 to 21.8. While the first section 31 extends from the introducer sheath 23 to the reversing position 33, the second section 32 extends from the reversing position 33 to the discharge lock 24. Both sections are arranged parallel to each other in the illustrated embodiment, but have opposite conveying directions, so that the Introductory lock 23 and the exit lock 24 are adjacent. In the variant shown in FIG. 1 b, the introducer sheath 23 and the discharge sheath 24 are arranged at opposite ends of the cooling tunnel 1.
  • the conveyor 30 has a return section 34. This is arranged immediately in front of the discharge lock 24 and after the last treatment position 21.8 of the second section 32 and, if required, allows a transfer of articles 10 from the second section 32 to the first section 31. As a result, articles 10 can optionally be discharged or further cooled.
  • the section can be designed, for example, as a driven roller conveyor with raisable and lowerable rollers, so that, depending on its position, an object transported on the second section 32 is picked up and branched off to the first section 31 or transported on to the discharge lock 24.
  • a transfer device 35 for transferring articles 10 from the first section 31 of the conveyor to the second section 32 of the conveyor is arranged.
  • the transfer device 35 can be configured as a roller conveyor with rollers driven transversely to the sections 31 and 32. Converted articles 10 or pallets 11 with them thus retain their original orientation when transferred from the first section 31 to the second section 32.
  • the outflow regions 21.1 to 21.4 assigned to the first section 31 and the outflow regions 21.5 to 21.8 assigned to the second section 32 are arranged in each case on opposite side walls 25 and 26 of the treatment space 20 parallel to the two sections 31 and 32 of the conveyor 30, the articles become 10 flows during transport through the treatment chamber 20 from opposite sides with cooling medium. As a result, the cooling behavior is made uniform.
  • the arrangement of an air outlet 27 between the first and second sections 31 and 32 of the conveyor 30 allows a good flow of product pallets arranged on the pallets 11.
  • the base unit A shown in Figure 1 with an import lock 23, an export lock 24 and a reversing position 33 and a return section 34 having conveyor 30 can be supplemented by further units B and C, as shown in Figure 2 by way of example.
  • Each of the further units B and C in turn comprises a conveyor 30 which has at least one reversing position with a transfer device 35B, 35C for transferring articles from the first section 3 IB, 3 IC to the second section 32B, 32C.
  • a return section may optionally be additionally provided on the further units, permitting a transfer from the second section 32B, 32C to the first section 3 IB, 3 IC.
  • all the shifters 35A, 35B may be bi-directional, that is, one to and fro between the first and second sections 3A, IB, and 32A. 32B enable.
  • the onflow regions 22A, 22B, 22C can be operated and / or controlled individually at the treatment positions of the units A, B and C. Bulkheads 28 between the individual units A, B and C permit individual operation in the correspondingly formed chambers or treatment rooms of the units, including a temporary shutdown of one or both further chambers B and C.
  • FIG 2 shows a total of three units A, B and C. However, their number can be chosen larger or smaller. In particular, the other units B and C can be constructed in the same way. By adding further units, the maximum flow rate of the cooling tunnel 1 can be increased.
  • a base unit A with an introducer sluice 23 and a discharge sluice 24 can also be provided at both ends of the cooling tunnel 1.
  • Figure 3 shows a view of the conveyor 30 in a plan view, wherein for reasons of illustration, only a base unit A and a further unit B are shown. The first section 31 of the conveyor is divided according to the division of the cooling tunnel 1 in the units A and B in separately drivable sections 31A and 3 IB.
  • the partial area 31A has an individually activatable single-user drive 36.1 to 36.x, so that the objects 10 can be transported individually forward in a region directly adjoining the introducer sheath 23 and the return section 34.
  • a chain conveyor with a central drive 37 is provided in section 3 IB.
  • a chain conveyor with a central drive 38 or 39 is used in each case.
  • a chain conveyor with a central drive it is also possible for a chain conveyor with a central drive to be provided in the partial area 31A instead of the single-space drives 36.1 to 36.x, as in the other partial areas.
  • Figure 4 shows a section through the cooling tunnel 1 transverse to the transport direction of the first and second sections 31 and 32 to illustrate the provision and circulation of the cooling medium.
  • the cooling medium is provided via lateral onflow regions 22.
  • the pressure supply can be centralized or decentralized.
  • Each unit A, B and C preferably has its own pressure supply device 40.
  • a single pressure supply device 40 may be provided with a central pressure generator for all units A, B and C.
  • Each pressure supply device 40 comprises one or more fans 41, via which or the air is sucked out of the treatment space 20 and conducted via one or more coolers 42 into pressure chambers 43.
  • the pressure chambers 43 each supply a plurality of treatment positions 21.1. to 21.x via nozzle plates 44 with a defined air flow for cooling the objects located there 10.
  • articles 10 can be processed with greatly different desired cooling times, wherein a high throughput is achieved due to the high system flexibility, while deviations from the target cooling times remain low.
  • objects 10 with high set cooling times reduce the throughput of objects 10 with low set cooling times, when both are to be cooled at least with the set cooling time.
  • the cooling tunnel 1 can be operated fully automatically by means of a control device, wherein objects 10 with different desired cooling times can be introduced into the treatment space 20 via the introduction sluice 23 in any order and at any desired time.
  • control device allows individual control of the individual sections 31, 32, 34 and 35 of the conveyor 30 and optionally existing section sections 3 IA, 3 IB, 3 IC, 32A, 32B and 32C.
  • the feed of the supplied articles 10 is adjusted to one another by activation of the individual sections of the conveyor in order to realize the desired set cooling times while avoiding noticeable excesses. If it is determined in the controller for an item 10 that its cooling time account expires, then the position of the item 10 is determined based on the cooling time account and the intermediate actuation of the conveyor 30 and transported by actuation of the relevant sections of the conveyor 30 in the direction of the discharge lock 24 ,
  • the article 10 in question is preceded by further articles 10 having a higher residual cooling time.
  • it is checked on detection of an object 10 before the return section 34, if its cooling time account has expired. If this is the case, the object in question 10 is discharged by actuation of the second section 32. Otherwise, the object 10 in question is transferred to the first section 31 of the conveyor 30 by actuation of the return section 34, so that it can be further cooled.
  • the operation there conversion means 35 is involved in the control that, for example, when detecting an object 10 before or at one by means of in the Control device is checked whether the object 10 is to transfer to the second section 32 or stay in the first section 31.
  • a transfer device 35 which is not the furthest from the introducer 23 transfer device 35C, the delivery path for an object 10 can be abbreviated individually. As a result, for example, objects with higher residual cooling times can be overtaken, so that for these the delivery route remains short and unnecessary circulation is not caused.
  • the control device causes actuation of the relevant sections 31, 35 and 32 in order to transport the objects mentioned in the direction of the discharge lock 24.
  • the object 10.1 can remain at its treatment position.
  • the object 10.3 must be transported in each case so that the subsequent object 10.2 with a shorter residual cooling time does not remain unnecessarily long in the cooling tunnel 1.
  • a chain conveyor is used in section 31 instead of single-station conveyors, the object 10.1 is taken along at least up to the reversing position 33. Of course, you can also transport all objects 10.1 to 10.4 as a block to the return section 34.

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)
  • Tunnel Furnaces (AREA)
  • Pallets (AREA)

Abstract

L'invention concerne un tunnel de refroidissement comportant un sas d'entrée (23) pour l'introduction d'objets à refroidir, de préférence empilés sur des palettes, un sas de sortie (24) pour l'extraction des objets, une pluralité de positions de traitement consécutives (21.1 à 21.x) pour appliquer un fluide de refroidissement, de préférence de l'air de refroidissement, sur les objets à refroidir, et un dispositif de transport (30) pour transporter les objets à refroidir du sas d'entrée (23) vers le sas de sortie (24), le dispositif de transport (30) traversant les positions de traitement individuelles (21.1 à 21.x). Le dispositif de transport (30) comporte une première partie (31) traversant plusieurs positions de traitement, s'étendant du sas d'entrée (23) vers une position de retour (33), une deuxième partie (32) traversant plusieurs positions de traitement, s'étendant de la position de retour (33) vers le sas de sortie (24), et une partie de recyclage (34) disposée en amont du sas de sortie (24) et connectant une zone côté sortie de la deuxième partie (32) à une zone côté entrée de la première partie (31) afin d'extraire des objets ou de les soumettre à un refroidissement ultérieur, de manière sélective. Le tunnel de refroidissement ainsi obtenu offre une capacité élevée associée à des durées de refroidissement variables et un respect de celles-ci dans une gamme de tolérances stricte. L'invention concerne également un procédé d'utilisation d'un tunnel de refroidissement ou d'un système de refroidissement de palettes.
EP09734359A 2008-04-21 2009-04-21 Tunnel de refroidissement et procédé d'utilisation de celui-ci Active EP2283285B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL09734359T PL2283285T3 (pl) 2008-04-21 2009-04-21 Tunel chłodniczy i sposób jego działania

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008019903A DE102008019903A1 (de) 2008-04-21 2008-04-21 Kühltunnel und Verfahren zum Betrieb eines solchen
PCT/EP2009/054722 WO2009130206A2 (fr) 2008-04-21 2009-04-21 Tunnel de refroidissement et procédé d'utilisation de celui-ci

Publications (2)

Publication Number Publication Date
EP2283285A2 true EP2283285A2 (fr) 2011-02-16
EP2283285B1 EP2283285B1 (fr) 2012-09-26

Family

ID=41078727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09734359A Active EP2283285B1 (fr) 2008-04-21 2009-04-21 Tunnel de refroidissement et procédé d'utilisation de celui-ci

Country Status (5)

Country Link
US (1) US8549866B2 (fr)
EP (1) EP2283285B1 (fr)
DE (1) DE102008019903A1 (fr)
PL (1) PL2283285T3 (fr)
WO (1) WO2009130206A2 (fr)

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Also Published As

Publication number Publication date
PL2283285T3 (pl) 2013-02-28
WO2009130206A3 (fr) 2010-05-27
DE102008019903A1 (de) 2009-10-22
WO2009130206A2 (fr) 2009-10-29
EP2283285B1 (fr) 2012-09-26
US20110030393A1 (en) 2011-02-10
US8549866B2 (en) 2013-10-08

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