EP1048911A1 - Procédé pour dégrivrer et sécher des installations frigorifiques - Google Patents

Procédé pour dégrivrer et sécher des installations frigorifiques Download PDF

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Publication number
EP1048911A1
EP1048911A1 EP00107590A EP00107590A EP1048911A1 EP 1048911 A1 EP1048911 A1 EP 1048911A1 EP 00107590 A EP00107590 A EP 00107590A EP 00107590 A EP00107590 A EP 00107590A EP 1048911 A1 EP1048911 A1 EP 1048911A1
Authority
EP
European Patent Office
Prior art keywords
refrigeration system
gas
drying
thawing
gas mixture
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
EP00107590A
Other languages
German (de)
English (en)
Other versions
EP1048911B1 (fr
Inventor
Volker Dipl.-Ing. Kamm
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 Gas AG
Linde Technische Gase 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 Linde Gas AG, Linde Technische Gase GmbH filed Critical Linde Gas AG
Publication of EP1048911A1 publication Critical patent/EP1048911A1/fr
Application granted granted Critical
Publication of EP1048911B1 publication Critical patent/EP1048911B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • 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 invention relates to a method for thawing and drying a refrigeration system, such as for example a freezer, especially a spiral freezer.
  • the known defrosting methods such as those using open doors or the intake of cold water can be realized, however - at least partially - not inconsiderable disadvantages. For example, become a freezer thawed warm water, this can destroy the insulation in the medium term as well as various parts, such as the connection of two materials with different expansion coefficients.
  • Drying freezers that have a conveyor such as this is the case with the so-called spiral freezers, before (restarting) it makes sense or necessary, otherwise there will be ice on the transport system when driving cold could form, which in turn creates major problems with the funding mechanism can result.
  • the object of the present invention is a method for thawing and drying a refrigeration system, such as a freezer, by means of which the mentioned disadvantages can be avoided.
  • the defrost duration should as well as the drying time are reduced; next to all hygienic Requirements are met.
  • nitrogen is preferably used as the warm gas and / or gas mixture and / or a nitrogen-rich stream is used.
  • the temperature of the used Gas and / or gas mixture is at least 100 ° C.
  • the amount of heat introduced can be gentle, controlled and hygienic Defrosting and drying of the refrigeration system can be realized.
  • the purity of the gas and / or gas mixture used can be the proportion of in the freezer introduced foreign components, such as microorganisms, are minimized.
  • Warm nitrogen can also absorb a lot of moisture. This is especially when drying conveyor systems, such as the belt one Spiral freezer, an advantage. After flushing the refrigeration system or those Areas of the refrigeration system that need to be dried leave the nitrogen Refrigeration system again and takes the moisture with it.
  • the advantages over that previous drying processes "leave doors open" are obvious because neither new dirt or new microorganisms can get into the refrigeration system.
  • heated or heated ambient air is also suitable as a defrost and Dry gas. Under certain circumstances, it may make sense that the ambient air in front the supply to the refrigeration system to be defrosted for cleaning - for example one Adsorption and / or filtering process - is subjected.
  • the method according to the invention for thawing and drying a refrigeration system enables a shortening of the defrosting and drying time and thus one longer operating time of the respective refrigeration system; beyond that it brings Hygienic improvements.
  • Liquid nitrogen is removed from a liquid nitrogen tank 1 via line 2 and supplied to an evaporator 3.
  • the vaporized and thus gaseous nitrogen is fed from the evaporator 3 via line 4 to a valve 5. Subsequently the gaseous nitrogen passes through a line 6 into a nozzle 7, through which it enters the Freezer 10 - a spiral freezer is shown in the figure - is introduced.
  • nozzle 7 For the sake of clarity, only one nozzle 7 is shown in the figure; it is however, it goes without saying that a large number of nozzles are provided in practice can. These are preferably so-called flat nozzles for conveyor belt drying educated. If a transport system is provided within the freezer 10, it is expedient if the nozzles are aimed at this. It is important to ensure, that the materials used within the freezer in the immediate flow area of the warm gas can withstand the set gas temperatures.
  • a steam or gas heater 8 which is the Heating the gaseous nitrogen to the desired defrost temperature.
  • a controllable electric heater for example, is a controllable electric heater.
  • this is also conceivable for any other possibility of heating the Allows gas and / or gas mixture to the desired temperature.
  • the temperature of the Cooling system supplied warm gas and / or gas mixture by means of adjustable electric heater is controlled.
  • Gas (mixed) current should preferably be provided with a temperature sensor 9 become.
  • the defrost and drying gas or, of course, the nitrogen is produced in any other desired manner become.
  • nitrogen there are cryogenic, adsorptive and / or Membrane separation processes conceivable. It is also available in a storage container possible.

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)
  • Drying Of Solid Materials (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
EP00107590A 1999-04-30 2000-04-07 Procédé pour dégrivrer et sécher des installations frigorifiques Expired - Lifetime EP1048911B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19919935A DE19919935A1 (de) 1999-04-30 1999-04-30 Verfahren zum Auftauen und Trocknen von Kälteanlagen
DE19919935 1999-04-30

Publications (2)

Publication Number Publication Date
EP1048911A1 true EP1048911A1 (fr) 2000-11-02
EP1048911B1 EP1048911B1 (fr) 2003-06-18

Family

ID=7906569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00107590A Expired - Lifetime EP1048911B1 (fr) 1999-04-30 2000-04-07 Procédé pour dégrivrer et sécher des installations frigorifiques

Country Status (4)

Country Link
EP (1) EP1048911B1 (fr)
AT (1) ATE243308T1 (fr)
DE (2) DE19919935A1 (fr)
PL (1) PL194383B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210111566A (ko) * 2020-03-03 2021-09-13 (주)발맥스기술 액화천연가스 충전시설의 냉매 재활용 시스템 및 재활용 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007994A1 (fr) * 1989-11-29 1991-06-13 Frigoscandia Food Process Systems Ab Procede empechant la croissance bacterienne dans une installation de traitement d'aliments et installation de mise en ×uvre du procede
GB2249534A (en) * 1990-09-06 1992-05-13 Leek Brian Cleaning apparatus for endless conveyors.
US5349828A (en) * 1993-09-17 1994-09-27 The Boc Group, Inc. Conveyor belt cleaning apparatus for food freezing

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3830078A (en) * 1970-03-24 1974-08-20 Us Air Force Anti-frost apparatus
US4072488A (en) * 1976-12-10 1978-02-07 Kysor Industrial Corporation Air defrost reach-in refrigerated display cabinet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007994A1 (fr) * 1989-11-29 1991-06-13 Frigoscandia Food Process Systems Ab Procede empechant la croissance bacterienne dans une installation de traitement d'aliments et installation de mise en ×uvre du procede
GB2249534A (en) * 1990-09-06 1992-05-13 Leek Brian Cleaning apparatus for endless conveyors.
US5349828A (en) * 1993-09-17 1994-09-27 The Boc Group, Inc. Conveyor belt cleaning apparatus for food freezing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210111566A (ko) * 2020-03-03 2021-09-13 (주)발맥스기술 액화천연가스 충전시설의 냉매 재활용 시스템 및 재활용 방법

Also Published As

Publication number Publication date
ATE243308T1 (de) 2003-07-15
PL339423A1 (en) 2000-11-06
DE50002573D1 (de) 2003-07-24
PL194383B1 (pl) 2007-05-31
DE19919935A1 (de) 2000-11-02
EP1048911B1 (fr) 2003-06-18

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