EP1412686A1 - Kammer für eine gefriertrocknungseinrichtung - Google Patents
Kammer für eine gefriertrocknungseinrichtungInfo
- Publication number
- EP1412686A1 EP1412686A1 EP02791452A EP02791452A EP1412686A1 EP 1412686 A1 EP1412686 A1 EP 1412686A1 EP 02791452 A EP02791452 A EP 02791452A EP 02791452 A EP02791452 A EP 02791452A EP 1412686 A1 EP1412686 A1 EP 1412686A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- temperature
- plates
- freeze
- chamber according
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
Definitions
- the invention relates to a chamber for a freeze-drying device with temperature-adjustable shelves for containers in which the product to be freeze-dried is located.
- Freeze drying has become particularly popular in the pharmaceutical industry for the preservation of medicines, vaccines, etc.
- the chambers of modern freeze-drying facilities there is a plurality of shelves, on the shelves of which a variety of containers, vials or the like. (100,000 and more) finds space.
- the product usually dissolved in water, is filled into containers of this type.
- the liquid is frozen. This step usually already takes place in the chamber of the freeze-drying device by cooling the shelves appropriately deep (-40 ° C to -60 ° C).
- a chamber of the type mentioned at the outset is known from German Offenlegungsschrift 197 19 298. This document also explains a method for controlling the freeze drying process in the chamber.
- the drying process is essentially characterized by two drying phases. As long as there is crystallized (frozen) water in the product, this drying section is called the main or sublimation drying. If there is no more water in the form of ice, the remaining water is absorbed by the dry product and also more or less firmly bound. This water is removed during post-drying or desorption drying.
- certain chamber pressures and set temperatures An essential parameter is the ice temperature, which can be determined by measuring the pressure rise.
- Controlling the ice temperature in the sublimation area via the pressure presupposes that there is a uniform water vapor partial pressure in the chamber.
- This uniform pressure distribution is only possible to a limited extent in the area of the chamber walls and chamber doors or doors.
- the temperature of the product in the vial does not only depend on the shelf temperature; the temperature of the inner walls of the chamber also affects heat radiation.
- the water vapor emerging from the product has a temperature of -40 ° C
- this temperature increases on the setting plates e.g. to -20 ° C, while the water vapor near the walls e.g. Reached 20 ° C. Due to these temperature differences, pressure differences of more than 10% can occur.
- the desired requirement that there is a uniform water vapor partial pressure in the chamber is no longer met with sufficient accuracy; the ice temperature is no longer uniform. The result is a loss of product quality.
- the chamber with its door (s) can be used in production plants, especially if they need to be steam sterilized, have a mass of many tons. These masses would have to be cooled down to -40 ° C and often to -60 ° C during freezing, which either leads to an impermissibly long freezing time or to separate cooling systems that have to give up several times more cooling capacity than required for the shelves and the product is. Apart from these economic problems, it is technically difficult to mount the flanges on the chamber and the flange on the door, for example. -50 ° C to cool.
- the seals between the chamber and the door must remain functional at low temperatures and it is difficult to avoid condensation of the water vapor on these flanges.
- a conceivable insulation of the flanges against the water vapor condensation is technically not possible, since the chamber flange and door are housed in sterile rooms.
- the sterility requirements in a clean room preclude the use of insulating materials suitable for these low temperatures.
- the object of the present invention is to design a chamber for a freeze-drying device of the type mentioned at the outset without any particular technical effort in such a way that uniform temperature and water vapor pressure ratios are established during the freeze-drying process.
- this object is achieved in that an optical shield consisting of temperature-controlled components is provided between the shelves and the chamber inner surfaces. While the freeze-drying process is being carried out, the temperature-controlled components are set to the temperature that the setting plates also have.
- the chamber wall temperatures can no longer influence the temperature of the product in the vial. In the interior limited by the shielding components there are no longer measurable temperature and water vapor pressure differences. Further advantages and details of the invention will be explained with reference to an exemplary embodiment shown schematically in FIGS. 1 and 2. Show it
- FIG. 1 shows a vertical section through a chamber according to the invention
- Figure 2 shows a horizontal section through this chamber.
- the chamber is denoted by 1, the chamber wall by 2, its door by 3 (FIG. 2), the shelf plates located in chamber 1 by 4 and a vial depicted by way of example on the footprint of a shelf plate 4 by 5.
- the lower positioning plate 4 is supported on a stationary base plate 6.
- the remaining setting plates 4 can be moved up and down (double arrow 7) in such a way that their distance changes.
- a hydraulic drive pron rod 8
- the vials 5 are closed in a known manner with stoppers which have laterally ending passage channels for the water vapor and are placed on the vials 5 before the start of the freeze-drying process.
- the top plate 4 is attached to the plunger 9 of the piston rod 8.
- the setting plates 4 are part of a temperature control circuit 11 indicated by dashed lines.
- a brine flows through them, which, depending on requirements, is cooled in a heat exchanger 12 (connected to a refrigeration machine (not shown)) or heated with a heater 13.
- the controlled sequence of the freeze-drying process is served by a control 15 shown as a block, to which signals from a pressure sensor 16 arranged in the chamber are supplied as a control variable.
- the shelves are first cooled (freezing phase). During the Drying phases have temperatures above 0 ° C to accelerate the evaporation process.
- the chamber 1 is equipped with a connecting piece 21 to which a condenser 23 and a vacuum pump 24 are connected via a valve 22.
- the condenser 23 serves to accumulate the water vapor that is produced during the freeze-drying. Non-condensable gases are removed from the vacuum pump 24.
- the valve 22 is connected to the controller 15. It is temporarily closed in order to be able to determine the ice temperature with the help of pressure rise measurements.
- a shield is provided between the shelves and the inner surfaces of the chamber wall 2. It consists of several components 31 to 36, which enclose the setting plates 4 in such a way that there is no line of sight between the setting surfaces and the bottles 5 placed thereon on the one hand and the chamber inner wall surfaces on the other.
- the distances chosen between the components are dimensioned so large that the water vapor transport between the shelves and the connecting piece 21 can take place essentially unhindered. It is therefore expedient if the individual components overlap like a blind.
- the components 31 to 36 include the set of plates from all sides. Up and down, the upper and lower setting plate 4 form the desired, temperature-controlled privacy screen. If, for example, an upper positioning plate 4 is not present, one or more additional components must be present which provide the optical shielding towards the upper chamber wall.
- the components according to the invention result in an inner, optically sealed space 37 in which the setting plates 4 or setting surfaces for the vials 5 are located. Radiant heat emanating from the chamber inner wall surfaces can no longer influence the temperature and pressure conditions in room 37. During the course of the freeze-drying process, the desired pressures and temperatures in room 37 are set uniformly.
- the components 31, 32 have end sections bent at the top and bottom.
- An alternative to this is shown in FIG. 2.
- the components 31, 33 and 32, 33 each end with a gap that does not hinder the passage of steam in the area of the rear edges of the set of mounting plates.
- Further components 34, 35 preferably between the columns and the chamber wall 2,. assigned, whose width and length are selected so that there is no line of sight between the shelves and the chamber inner wall through the column.
- At 36 is a component of. Designated type of the invention, which is attached to the door 3 of the chamber 1 and is designed such that there is no line of sight between the shelves and the inner door surface. Bent sections 40 ensure the necessary overlap of the shielding components in the area of the front edges of the set of mounting plates.
- the shielding components are tempered. They are designed as relatively thin (less than 1 cm) double-walled plates and a heating / cooling medium (brine) flows through them.
- the plates expediently have the lowest possible heat capacity and are made of stainless steel.
- FIG. 1 shows a circuit 41 with a heat exchanger 42 and heating 43 which is independent of the temperature circuit 11 for the setting plates 4. All shielding components are part of this circuit 41.
- the component 36 fastened to the chamber door 3 is also supplied via flexible connecting lines 44 (FIG. 2).
- the control block 15 also serves to control the circuit 41.
- the figures also show that the pressure sensor 16 is located in the room 37.
- the pressure in this space 37 is decisive as the control variable.
- the pressure outside the space 37 is irrelevant for the controlled sequence of the freeze-drying process.
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Vending Machines For Individual Products (AREA)
- Physical Deposition Of Substances That Are Components Of Semiconductor Devices (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10136498A DE10136498A1 (de) | 2001-07-27 | 2001-07-27 | Kammer für eine Gefriertrocknungseinrichtung |
DE10136498 | 2001-07-27 | ||
PCT/EP2002/007828 WO2003012355A1 (de) | 2001-07-27 | 2002-07-15 | Kammer für eine gefriertrocknungseinrichtung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1412686A1 true EP1412686A1 (de) | 2004-04-28 |
EP1412686B1 EP1412686B1 (de) | 2007-03-21 |
EP1412686B8 EP1412686B8 (de) | 2007-05-09 |
Family
ID=7693223
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124001A Withdrawn EP1279913A1 (de) | 2001-07-27 | 2001-10-09 | Kammer für eine Gefriertrocknungseinrichtung |
EP02791452A Expired - Lifetime EP1412686B8 (de) | 2001-07-27 | 2002-07-15 | Kammer für eine gefriertrocknungseinrichtung |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01124001A Withdrawn EP1279913A1 (de) | 2001-07-27 | 2001-10-09 | Kammer für eine Gefriertrocknungseinrichtung |
Country Status (10)
Country | Link |
---|---|
US (1) | US6920701B2 (de) |
EP (2) | EP1279913A1 (de) |
JP (1) | JP3984591B2 (de) |
AT (1) | ATE357638T1 (de) |
AU (1) | AU2002333243B2 (de) |
DE (2) | DE10136498A1 (de) |
DK (1) | DK1412686T3 (de) |
ES (1) | ES2284957T3 (de) |
PT (1) | PT1412686E (de) |
WO (1) | WO2003012355A1 (de) |
Families Citing this family (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10218007A1 (de) | 2002-04-23 | 2003-11-06 | Bayer Ag | Gefriertrockenvorrichtung |
DE102004007526A1 (de) * | 2004-02-17 | 2005-09-01 | Oetjen, Georg-Wilhelm, Dr. | Verfahren und Einrichtung zur Gefriertrocknung von Produkten |
WO2008057001A1 (fr) * | 2006-11-07 | 2008-05-15 | Lev Kuzmich Kovalev | Dispositif de déshydratation à basse température de matériaux sous vide |
DE102007049278B4 (de) | 2007-10-12 | 2010-08-05 | Gea Lyophil Gmbh | Vorrichtungen zum Gefriertrocknen |
US8371039B2 (en) * | 2009-12-30 | 2013-02-12 | Baxter International Inc. | Thermal shielding to optimize lyophilization process for pre-filled syringes or vials |
US8966782B2 (en) * | 2010-09-28 | 2015-03-03 | Baxter International Inc. | Optimization of nucleation and crystallization for lyophilization using gap freezing |
US8689460B2 (en) | 2010-09-28 | 2014-04-08 | Baxter International Inc. | Optimization of nucleation and crystallization for lyophilization using gap freezing |
KR20150009982A (ko) | 2012-05-03 | 2015-01-27 | 쇼오트 아게 | 의료, 제약 또는 화장품 어플리케이션들을 위한 물질들을 저장하기 위한 컨테이너들을 처리하기 위한 방법 및 장치 |
US9180145B2 (en) * | 2012-10-12 | 2015-11-10 | Mimedx Group, Inc. | Compositions and methods for recruiting and localizing stem cells |
US10480855B2 (en) * | 2014-10-08 | 2019-11-19 | Robert M. Parker | Heated shelf for a freeze-drying system having a leading folded edge that does not catch on food being removed from the system |
EP3070425B1 (de) * | 2015-03-16 | 2018-08-15 | Martin Christ Gefriertrocknungsanlagen GmbH | Gefriertrockner mit einem sichtfenster |
CN105004144B (zh) * | 2015-07-17 | 2017-03-29 | 上海化工研究院 | 一种可变容积的迭加式真空干燥恒温箱 |
US10605527B2 (en) | 2015-09-22 | 2020-03-31 | Millrock Technology, Inc. | Apparatus and method for developing freeze drying protocols using small batches of product |
EP3392584B1 (de) * | 2017-04-21 | 2019-12-18 | GEA Lyophil GmbH | Gefriertrockner und verfahren zur induzierung von nukleierung in produkten |
US10451346B1 (en) * | 2019-03-31 | 2019-10-22 | Vinamit Usa Llc | Convection current freeze drying apparatus and method of operating the same |
US10966439B2 (en) * | 2019-01-27 | 2021-04-06 | Vinamit Usa Llc | Concentrated fruit juice powder and method for preparing the same using a non-linear screw press juicer and convection current freeze drying apparatus |
US10676797B1 (en) * | 2019-01-27 | 2020-06-09 | Vinamit Usa Llc | Concentrated sugarcane juice powder and method for preparing the same using the convection current freeze drying apparatus |
US10921058B2 (en) * | 2019-01-27 | 2021-02-16 | Vinamit Usa Llc | Fully automatic convection current vacuum freeze drying method |
JP7390176B2 (ja) * | 2019-12-06 | 2023-12-01 | 株式会社アルバック | 真空乾燥装置、真空乾燥装置における棚の温度調節方法 |
JP2021096030A (ja) * | 2019-12-17 | 2021-06-24 | 株式会社アルバック | 真空乾燥装置、真空乾燥装置における棚の温度調節方法 |
US11054185B1 (en) * | 2020-02-24 | 2021-07-06 | Lyophilization Technology, Inc. | Apparatus for lyophilization of products contained in product delivery units |
US11506455B2 (en) * | 2020-03-05 | 2022-11-22 | Green Mountain Mechanical Design, Inc. | Partial vacuum drying system and method |
CN116045606B (zh) * | 2023-01-13 | 2023-09-22 | 浙江毓昌生物技术有限公司 | 一种冷冻箱及操作方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3048928A (en) * | 1959-04-27 | 1962-08-14 | Raytheon Co | Freeze-drying apparatus |
NL144053C (nl) * | 1962-04-09 | 1975-04-15 | Hills Bros Coffee | Werkwijze en inrichting voor het continu drogen van bevroren, waterbevattende materiaaldeeltjes. |
US3311991A (en) * | 1965-04-20 | 1967-04-04 | Pillsbury Co | Drying apparatus and method |
US3762065A (en) * | 1971-04-12 | 1973-10-02 | Kamas Kvarnmaskiner Ab | Apparatus for drying materials |
WO1996022496A1 (en) * | 1995-01-20 | 1996-07-25 | Freezedry Specialties, Inc. | Freeze dryer |
GB9505523D0 (en) * | 1995-03-18 | 1995-05-03 | Wellcome Found | Lyophilization process |
FR2740108B1 (fr) * | 1995-08-22 | 1998-03-27 | Lab Francais Du Fractionnement | Emballage etanche pour sechage, notamment lyophilisation, et procede de sechage, notamment de lyophilisation, a l'aide d'un tel emballage |
AT1399U1 (de) * | 1995-11-29 | 1997-04-25 | Immuno Ag | Verfahren und einrichtung zum lyophilisieren |
DE19719398A1 (de) | 1997-05-07 | 1998-11-12 | Amsco Finn Aqua Gmbh | Verfahren zur Steuerung eines Gefriertrocknungsprozesses |
-
2001
- 2001-07-27 DE DE10136498A patent/DE10136498A1/de not_active Withdrawn
- 2001-10-09 EP EP01124001A patent/EP1279913A1/de not_active Withdrawn
-
2002
- 2002-07-15 DK DK02791452T patent/DK1412686T3/da active
- 2002-07-15 US US10/485,032 patent/US6920701B2/en not_active Expired - Fee Related
- 2002-07-15 EP EP02791452A patent/EP1412686B8/de not_active Expired - Lifetime
- 2002-07-15 ES ES02791452T patent/ES2284957T3/es not_active Expired - Lifetime
- 2002-07-15 DE DE50209781T patent/DE50209781D1/de not_active Expired - Lifetime
- 2002-07-15 AU AU2002333243A patent/AU2002333243B2/en not_active Ceased
- 2002-07-15 JP JP2003517508A patent/JP3984591B2/ja not_active Expired - Lifetime
- 2002-07-15 WO PCT/EP2002/007828 patent/WO2003012355A1/de active IP Right Grant
- 2002-07-15 AT AT02791452T patent/ATE357638T1/de not_active IP Right Cessation
- 2002-07-15 PT PT02791452T patent/PT1412686E/pt unknown
Non-Patent Citations (1)
Title |
---|
See references of WO03012355A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003012355A1 (de) | 2003-02-13 |
AU2002333243B2 (en) | 2007-05-24 |
EP1412686B1 (de) | 2007-03-21 |
ATE357638T1 (de) | 2007-04-15 |
US20040250441A1 (en) | 2004-12-16 |
EP1412686B8 (de) | 2007-05-09 |
DE10136498A1 (de) | 2003-02-06 |
DE50209781D1 (de) | 2007-05-03 |
PT1412686E (pt) | 2007-06-29 |
ES2284957T3 (es) | 2007-11-16 |
JP3984591B2 (ja) | 2007-10-03 |
DK1412686T3 (da) | 2007-07-30 |
EP1279913A1 (de) | 2003-01-29 |
US6920701B2 (en) | 2005-07-26 |
JP2004537025A (ja) | 2004-12-09 |
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