EP1450119A1 - Appareil de climatisation et méthode de dégivrage d'un échangeur de chaleur d'un appareil de climatisation - Google Patents

Appareil de climatisation et méthode de dégivrage d'un échangeur de chaleur d'un appareil de climatisation Download PDF

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Publication number
EP1450119A1
EP1450119A1 EP03023393A EP03023393A EP1450119A1 EP 1450119 A1 EP1450119 A1 EP 1450119A1 EP 03023393 A EP03023393 A EP 03023393A EP 03023393 A EP03023393 A EP 03023393A EP 1450119 A1 EP1450119 A1 EP 1450119A1
Authority
EP
European Patent Office
Prior art keywords
gas
air conditioning
space
conditioning device
connection opening
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.)
Withdrawn
Application number
EP03023393A
Other languages
German (de)
English (en)
Inventor
Achim Melching
Dieter Bidlingmaier
Olaf Brömsen
Jürgen Schneider
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.)
Thermo Electron LED GmbH
Original Assignee
Kendro Laboratory Products 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 Kendro Laboratory Products GmbH filed Critical Kendro Laboratory Products GmbH
Publication of EP1450119A1 publication Critical patent/EP1450119A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F25D17/042—Air treating means within refrigerated spaces
    • F25D17/047—Pressure equalising devices

Definitions

  • the invention relates to a climate control device comprising a usable space and one with the same via at least one connection opening communicating unit space, in which a heat exchanger is arranged.
  • the invention further relates to a method for Operation of the air conditioner.
  • a climate device is understood to mean a device which allows a certain climate to be created in a usable space. It will Climate mainly due to the temperature, the humidity and the composition of it located gas determined. Especially in the field of life sciences and medicine often objects are stored for a certain time under given climatic conditions become. Open shells, closed containers, so-called Understand microtiter plates and similar containers for holding samples.
  • Air conditioning devices are generally known from the prior art. So the reveals DD-PS 141706 a test chamber for simulating climate parameters.
  • the test chamber points a usable space and an outer space in which a heat exchanger is arranged.
  • the Gas in the usable space is passed through an intake opening into the outer space and flows around the heat exchanger and is returned to the usable space via an inlet opening.
  • the usable space is tempered to temperatures below freezing icing occurs when operating a climate device as an inevitable problem of the gas-flow heat exchanger.
  • the heat exchanger must therefore be defrosted regularly become.
  • defrosting heat exchangers such as hot gas defrosting and defrosting using an electrical defrost heater. Independent of The defrosting process leads to the conversion of ice into liquid and over the vapor pressure of the liquid eventually to form water vapor. The phase transition from liquid to gaseous water is associated with a relatively large increase in volume. As a result, there is a significant increase in moisture during defrosting of the gas surrounding the defrosting heat exchanger.
  • the gas exchange between the room in which the heat exchanger is arranged, and the usable space is the gas that is strongly moistened by the defrosting process into the usable area transported. If the usable room temperature is below freezing point, the moisture from the defrosting process as a layer of frost or ice on the one in the usable space located objects, the storage device holding the objects and any existing transport system.
  • the invention is therefore based on the object of specifying a climate control device and a method of the type mentioned at the outset, which prevent frost and ice formation in the useful space caused by the defrosting process.
  • the task for a climate device described at the outset becomes thereby solved that at the at least one connection opening between usable and unit space a locking device is arranged with which the gas exchange between the useful space and the unit space can optionally be prevented.
  • the blocking device prevents the heat exchanger from defrosting humidified gas from the unit room can get into the usable room.
  • frost and ice form at usable room temperatures below freezing in the usable space, especially on the stored objects, excluded. Can too the objects do not freeze to the storage device holding them, causing even after repeated defrosting of the heat exchanger makes it easy to remove the objects from the Storage device is possible. Furthermore, the formation of a layer of frost or ice on an automated transport system possibly present in the usable space is effectively prevented.
  • the device according to the invention prevents at a usable room temperature an undesirable increase in the relative humidity above the freezing point Usable space, the so-called rewetting. As a result, it is not possible that in the utility room stored objects can be damaged or even destroyed by an increase in moisture.
  • the locking device is a device for Formation of a gas curtain across the connection opening. Because the connection opening (s) will be covered with a gas curtain over its entire cross-section This prevents gas from being able to pass from the unit space into the usable space.
  • This Locking device has no moving mechanical parts and still prevents reliable gas exchange between the unit and usable space.
  • the gas curtain is expediently provided with at least one gas outlet opening, preferably several Gas outlet openings.
  • the at least one gas outlet opening can in principle be located anywhere in the area of the connection opening as long as the place of attachment and opening size ensure that the opening cross section of the connection opening is complete is covered by the gas flow.
  • a slot nozzle for example, can be used as the gas outlet opening serve.
  • several small nozzles can be used to cover the opening cross section be used.
  • the gas outlet openings can be both inside and outside the connection opening be arranged or both.
  • connection openings outside the connection opening in the usable space in the area adjacent to the end of the usable space of the connection opening such that the outflow openings of the gas outlet openings point in the direction of the unit space.
  • the gas flow then flows through the connection opening from the inner towards the outer end.
  • the length of the connection opening is usually determined by the thickness of the wall that separates the usable space from the unit space. However, it is also possible to extend the connection opening beyond the thickness of the side walls and to let the connection opening walls protrude into the interior of the usable space or, preferably, into the unit space.
  • a covering the cross section of the connection opening can be particularly reliably Achieve a gas curtain if multiple gas vents are used to build the gas curtain become.
  • gas outlet openings can be on opposite sides lie opposite the connection opening or on all of its sides.
  • the number of gas discharge openings depends on the size of the connection opening and should in any case be sufficient to ensure a gas flow that prevents the ingress of Prevents air from the engine room into the connection opening. It can be useful be to arrange several rows of gas discharge openings in the connection opening. A high number of gas discharge openings per area can be achieved, for example, by staggered arrangement of the gas discharge openings can be achieved.
  • gas outlet openings in the side walls of the connection opening you can also one or more gas lines with gas outlet openings in the line walls in the connection opening be relocated.
  • one or more gas lines with in the openings made straight, meandering or spiral in the connection opening be misplaced.
  • connection opening When a large number of gas discharge openings are made in the walls of the connection opening it can be useful for an even and simple supply of the gas, the connection opening at least in the areas in which the gas outlet openings are present are surrounded with a chamber that is filled with the gas and from where the gas then into the gas discharge openings connected to the gas collection chamber arrives. There is only a single gas supply line that opens into the gas collection chamber necessary.
  • gas outlet openings in the connection opening can at least one gas outlet opening adjacent to the connecting opening be provided to an input of the connection opening.
  • the possibility of attachment on the usable space side has already been mentioned. However, the attachment on the Physical space side.
  • gas discharge openings can be provided on both sides, in whole or in part around the connection opening.
  • an arrangement of several Rows of gas vents on top of each other to the side of the opening can be useful to get one to create a sufficiently thick gas curtain.
  • a gas pipe can also be installed in the pipe wall introduced openings, for example, spirally around the connection opening be wrapped.
  • the gas outlet openings on the outside in front of the connection opening should be oriented that gas does not flow exactly parallel to the opening cross-section of the connection opening, but something is directed away from the connection opening.
  • any gas can be used as a gas with regard to that present in the useful space of the climatic cabinet Atmosphere suitable gas can be used.
  • suitable gas can be used.
  • Gases and / or inert gases are used, for example dried air, nitrogen or carbon dioxide.
  • Nitrogen is currently preferred. This has the advantage that the in Laboratories usually existing nitrogen lines can be used, if necessary using a reducing valve that sets the pressure to an appropriate pre-pressure reduced by, for example, 1 bar.
  • the locking device is a mechanical lock.
  • This can for example be a flap and in particular an automatically closing flap, which, for example, is spring-loaded is up to a predetermined pressure difference between the usable space and the aggregate space To block the connection opening.
  • a slide is possible as a mechanical closure. The slide should not only be a linearly movable closure, but also a slider rotatable about a pivot axis.
  • the slide is attached to the usable space side of the connection opening and can be actuated with a transport system arranged in the usable area. If a transport system already present in the usable space for transporting objects is also used to actuate the lock, no additional actuation system is required for the lock, and external intervention by operating personnel is unnecessary.
  • the mechanical lock can also be operated manually, by a motor drive or electromagnetically.
  • the heat transfer properties of the closure should be reduced as much as possible.
  • the closure can be heat-insulated or heated or consist of a material with low thermal conductivity.
  • the climate device according to the invention is preferably designed such that it can be operated as automatically as possible.
  • there is a control device which can be used, among other things, to control the locking device in such a way that its commissioning is linked to the operating state of the heat exchanger and / or the temperature in the unit space.
  • a suction device such as a Suction fan can be set in motion, the humid air from the unit room into the outside environment promotes the climate device and thus leads to dehumidification in the unit room contributes.
  • the suction fan can, for example, in the area of the pressure compensation opening Air conditioning device can be arranged.
  • the invention relates to a method for operating the above described air conditioning device such that the control device in the locking device Operation continues and simultaneously with the activation of the locking device or after its activation interrupts the operation of the heat exchanger.
  • the The locking device is put out of operation again when the heat exchanger is in operation again is taken.
  • the operation of the locking device after the Operation of the heat exchanger not interrupted.
  • the gas supply is running even when the heat exchanger is switched on, i.e. in the regular operation of the air conditioning device, further. As a result, supplied gas also accumulates in the usable space.
  • the one arranged in the aggregate space can be used Fan can be switched on. But it is also possible to defrost the heat exchanger, i.e. with the fan switched off to carry out the gas displacement. With Deactivation of the locking device is advantageously the fan for receiving the Air conditioning mode switched on again.
  • Fig. 1 shows a climate device 1, which, apart from the configuration in the area of Connection openings 5 in a separating a usable space 2 from an aggregate space 3 Wall 14, essentially corresponds to the prior art.
  • a heat exchanger 4 is arranged in the unit space 3. With one in the engine room 3 located fan 13, the gas atmosphere located inside the air conditioning device 1 through the unit space 3 via the connection openings 5 and the useful space 2 circulated.
  • a heatable serves to compensate for excess or negative pressure in the device 1 Pressure equalization opening 12.
  • the circulated gas masses can be unhindered during normal climate control through the connection openings 5 from the utility room 2 into the unit room 3 and back stream.
  • the fan 13 When the heat exchanger 4 is turned off for defrosting, the fan 13 also turned off and the locking device 6 activated.
  • the locking device 6 is arranged in the region of both connection openings 5. She consists two each extending essentially over the entire width of the connection openings 5 Gas lines 9 running along two opposite sides of the connection openings 5 are arranged. If the blocking device 6 is activated, flows out of the gas lines 9 a gas 7 'with a fixed gas pressure. To the whole cross section of the To obtain the respective connection opening 5 covering gas curtain 7 are over the entire Length (that is, perpendicular to the plane of the drawing) of each gas line 9 a plurality of gas outlet openings 8 available. For each gas line 9 there are two rows facing the unit space 3 Gas outlet openings 8, from which gas 7 'obliquely outwards away from the gas lines flows. As a result, a gas curtain 7 is built up transversely to the connection opening 5 Penetration of moist gas located in the unit space 3 into the connection openings 5 prevented.
  • the pressure compensation opening 12 is heatable to ensure that it is cold from flowing through it and damp gas does not freeze.
  • the gas pressure of the outflowing gas 7 'and the number of gas outlet openings 8 not only the thickness of the gas curtain 7 is determined, but also the volume flow to gas 7 ′ which emerges from the unit space 3 through the pressure compensation opening 12 is discharged to the outside.
  • the locking device 6 can additionally be used to influence the atmosphere in the usable space 2 become.
  • gas 7 ' also penetrates usable space 2 and displaces existing gas there.
  • the gas volume exchanged to increase, the supply of gas 7 ' can be extended beyond the time of defrosting and take place continuously, for example. With a sufficiently strong and long gas supply a complete exchange of the atmosphere in the usable space can thus be achieved by gas 7 '.
  • connection hole 5 is a plan view of a connection hole 5 from the side of the engine room 3 forth. Apart from the training in the area of this connection opening 5, the remaining climate device, not shown in the figure, that of FIG. 1.
  • gas lines 9 are the gas lines in the 2 attached outside of the connection openings 5. On the website the wall 14, which faces the unit space 3, two gas lines 9 run along opposite ones Sides of each of the connection openings 5.
  • the gas flow out of the gas exhaust ports 8 is somewhat directed away from the entrance of the connection opening 5 and runs obliquely into the unit space 3 in. Penetration can occur due to the flow of the gas 7 ′ from the connection opening 5 of humid air from the engine room 3 can be prevented even more reliably.
  • connection opening 5 of a further exemplary embodiment an air conditioning device according to the invention, which again except for the deviations described basically the air conditioning devices shown in the figures described above equivalent.
  • the view shows the end of the connection opening 5 on the aggregate space side.
  • the gas curtain covering the cross section of the connection opening 5 is here through gas outlet openings 8 generated, which are arranged inside the connection opening 5. in the The area of the left side wall 5a is evenly distributed over its surface 5 rows of 5 Gas outlet openings available.
  • These gas outlet openings 8 go through the side wall 5a and open into a surrounding the connection opening 5 and through the dotted Line illustrates gas collection chamber 17, which supplies gas via a gas connection becomes.
  • This gas collection chamber 17 is used to build up a gas pre-pressure and the uniform Distribution of the gas.
  • connection openings 5 each by a locking device 6 'in the form of a mechanical closure locked.
  • the mechanical closure is a slide 10, which has a handle element 11 having.
  • the slider 10 can be displaced by a pushing force which acts on the grip element 11 are, whereby the connection opening 5 is covered or released. in the shown case, the shift takes place in the right-left direction in the paper plane.
  • alternative is also a rotation of the respective slide around an opposite of the handle element Possible axis of rotation.
  • the slide 10 is shifted here with one arranged in the useful space 2
  • Transport system 15 for objects stored in the usable space as for example from DE 10024581 A1 is known.
  • the transport system 15 arranged in the usable space thus serves both to operate the mechanical lock as well as to transport the objects within the useful space 2.
  • the blade 16 presses the Transport system 15 by applying a pushing force to the handle element 11 the slider 10 towards the center of the useful space. This opens the connection opening 5.
  • the slider 10 can be heat-insulating or heatable so that it does not get cold from the Unit room 3 transferred to usable space 2.
  • FIG. 5 shows a variant corresponding to FIG. 4, in which, however, flaps 18 and 19 are provided as closures of the connecting openings 5 instead of the slide. These flaps can also be heat-insulating or heatable.
  • the flaps are shown in the closed state, i.e. in the state that they assume during a defrosting process.
  • the flaps 18, 19 are opened by pivoting about a holding device attached in the region of the edges 20.
  • the flaps 18, 19 are opened by the air flow caused by the fan 13.
  • the flap 18 for the air flowing from the utility space 2 to the unit space 3 is located (indicated by the arrows) on the side of the unit space, while the flap 19 for air which flows from the unit space 3 into the unit space 2 is on the side of the usable space. If the fan 13 is switched off, the flaps 18, 19 close automatically. This can be achieved, for example, by spring elements which are not shown in the drawing. If the heat exchanger 4 and the fan 13 are switched off to defrost, no further measures are necessary to close the flaps 18 and 19 and thus prevent the ingress of moist and cold air into the usable space.

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  • 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)
  • Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
  • Air-Flow Control Members (AREA)
  • Air Conditioning Control Device (AREA)
EP03023393A 2003-02-01 2003-10-16 Appareil de climatisation et méthode de dégivrage d'un échangeur de chaleur d'un appareil de climatisation Withdrawn EP1450119A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10304011A DE10304011A1 (de) 2003-02-01 2003-02-01 Klimavorrichtung und Verfahren zum Abtauen eines Wärmeaustauschers einer Klimavorrichtung
DE10304011 2003-02-01

Publications (1)

Publication Number Publication Date
EP1450119A1 true EP1450119A1 (fr) 2004-08-25

Family

ID=32667952

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03023393A Withdrawn EP1450119A1 (fr) 2003-02-01 2003-10-16 Appareil de climatisation et méthode de dégivrage d'un échangeur de chaleur d'un appareil de climatisation

Country Status (3)

Country Link
US (2) US20040216478A1 (fr)
EP (1) EP1450119A1 (fr)
DE (1) DE10304011A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110173794A (zh) * 2019-05-27 2019-08-27 广东美的制冷设备有限公司 空调器及其控制方法和装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1972874B1 (fr) * 2007-03-20 2019-02-13 Liconic Ag Stockage de substances automatisé
DE102010000956B4 (de) * 2010-01-15 2014-05-28 Thermofin Gmbh Wärmeübertrageranordnung
US8759084B2 (en) 2010-01-22 2014-06-24 Michael J. Nichols Self-sterilizing automated incubator
JP2019035509A (ja) * 2017-08-10 2019-03-07 ホシザキ株式会社 冷却貯蔵庫

Citations (7)

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Publication number Priority date Publication date Assignee Title
DE2650686A1 (de) * 1976-11-05 1978-05-11 Heraeus Voetsch Gmbh Pruefschrank bzw. -kammer
DD141706A1 (de) * 1979-03-30 1980-05-14 Lothar Goldschalt Pruefkammer zur simulation von klimaparametern
DE3108678A1 (de) * 1981-03-07 1983-01-20 Glatt Maschinen- Und Apparatebau Ag, Pratteln Reinraumkabine
US4572283A (en) * 1984-08-31 1986-02-25 Wehr Corporation Environmental test chamber
US4979431A (en) * 1988-11-08 1990-12-25 Mitsui O. S. K. Lines, Ltd. Gaseous flow construction of box member for refrigerated transportion and box member for refrigerated transportation using the same
US5867994A (en) * 1997-09-19 1999-02-09 Kopko; William L. Dual-service evaporator system for refrigerators
US6146267A (en) * 1997-03-03 2000-11-14 U.N.I.R. Ultra Propre-Nutrition Industrie-Recherche Device for separating two zones with different environment

Family Cites Families (5)

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DE3113055A1 (de) * 1981-04-01 1982-10-21 Koenig & Bauer AG, 8700 Würzburg "sammeldruck-rotationsmaschinendruckwerk fuer wertpapierdruck"
JPS61257311A (ja) * 1984-08-21 1986-11-14 Nissan Motor Co Ltd 車両用空調装置
US5156015A (en) * 1990-12-20 1992-10-20 Samsung Electronics Co., Ltd. Method and apparatus for circulating cold air for an indirect-cooling type refrigerator
US5375428A (en) * 1992-08-14 1994-12-27 Whirlpool Corporation Control algorithm for dual temperature evaporator system
JP3399243B2 (ja) * 1996-08-08 2003-04-21 三菱電機株式会社 冷凍冷蔵庫

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2650686A1 (de) * 1976-11-05 1978-05-11 Heraeus Voetsch Gmbh Pruefschrank bzw. -kammer
DD141706A1 (de) * 1979-03-30 1980-05-14 Lothar Goldschalt Pruefkammer zur simulation von klimaparametern
DE3108678A1 (de) * 1981-03-07 1983-01-20 Glatt Maschinen- Und Apparatebau Ag, Pratteln Reinraumkabine
US4572283A (en) * 1984-08-31 1986-02-25 Wehr Corporation Environmental test chamber
US4979431A (en) * 1988-11-08 1990-12-25 Mitsui O. S. K. Lines, Ltd. Gaseous flow construction of box member for refrigerated transportion and box member for refrigerated transportation using the same
US6146267A (en) * 1997-03-03 2000-11-14 U.N.I.R. Ultra Propre-Nutrition Industrie-Recherche Device for separating two zones with different environment
US5867994A (en) * 1997-09-19 1999-02-09 Kopko; William L. Dual-service evaporator system for refrigerators

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110173794A (zh) * 2019-05-27 2019-08-27 广东美的制冷设备有限公司 空调器及其控制方法和装置

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US20040216478A1 (en) 2004-11-04
DE10304011A1 (de) 2004-08-05
US20060070389A1 (en) 2006-04-06

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