WO1989008807A1 - Process and device for defrosting the evaporator of a cooling unit - Google Patents
Process and device for defrosting the evaporator of a cooling unit Download PDFInfo
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- WO1989008807A1 WO1989008807A1 PCT/EP1989/000216 EP8900216W WO8908807A1 WO 1989008807 A1 WO1989008807 A1 WO 1989008807A1 EP 8900216 W EP8900216 W EP 8900216W WO 8908807 A1 WO8908807 A1 WO 8908807A1
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- Prior art keywords
- evaporator
- refrigerant
- tubes
- pipes
- heated
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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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
-
- 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
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
Definitions
- the invention relates to a method for defrosting ice or frost on the surfaces of an evaporator of a cooling unit and the like.
- the invention has for its object to provide a method and an apparatus of the type specified in such a way that considerable energy can be saved during the defrosting process.
- FIG. 1 is a perspective view of an evaporator, a first embodiment
- Fig. 4 is a schematic longitudinal section through a heating tube according to Fig. 3, and
- Fig. 5 shows schematically the defrost heater according to Fig. 3 and 4 in the refrigerant circuit.
- Fig. 1 generally 1 denotes an evaporator with fins 2 lying approximately parallel to one another, pipelines 3 for the refrigerant leading through the fin stack in a manner known per se.
- a plurality of tubes 4 are guided through the plate pack and protrude on the front side 5 of the plate pack.
- the tubes 4 lie with a slight slope in the plate pack, so that the section of the tubes 4 protruding on the front side 5 is lower than their end on the rear side labeled 6.
- a heating cartridge 7 is attached to the free ends of the tubes 4.
- the opposite, higher ends of the tubes 4 can each be closed or at least partially connected to one another.
- the heating cartridges 7 are switched on, the liquid refrigerant being evaporated in the above, lower-lying sections of the tubes 4 and the warm refrigerant vapor essentially being deposited only on the cold areas provided with ice and thus heating them up.
- the condensed refrigerant runs back into the protruding section of the pipes 4 on the front side 5.
- the tubes 4 are distributed over the cross-sectional area or front side 5 of the evaporator in such a way that this defrost heating in the form of those partially filled with refrigerant Pipes 4 all evaporator surfaces can be heated.
- the tubes 4, which are guided through the fin package with a slight slope, are connected at the lower end to a common refrigerant container 8, in which a heater 9, indicated by dashed lines, is arranged.
- a heater 9 indicated by dashed lines
- the higher, opposite ends of the tubes 4 can be closed on the rear side 6 of the plate pack or at least partially connected to one another. The operation of this defrost heater is carried out in the same way as that of FIG. 1.
- FIG. 3 shows a modified embodiment in which two tubes 10 run on the underside along the plate pack over its longitudinal dimension, one of which is shown schematically in FIG. 4 in a longitudinal section.
- the tube 10 forms a container for the refrigerant, a rod-shaped heater 11 or a heating device with a rod-shaped housing being arranged approximately concentrically in the tube 10, the connections for the heater not being shown.
- the two pipes 10 can be arranged at an incline, the two lower ends being connected to one another via a distributor pipe 12, while the higher ends on the opposite side of the plate pack can be closed or connected to one another.
- the heating tubes 10, which lie in the refrigerant circuit of the refrigerant flowing through the evaporator during normal operation, can also be arranged horizontally.
- the two tubes 10 provided with a heater on the underside of the evaporator are arranged on or in a condensate tray, not shown, so that these two tubes also serve as a heater for the condensate.
- FIG. 5 shows schematically the embodiment of FIGS. 3 and 4 in connection with an electronically controlled expansion valve 15 and a solenoid valve 16.
- Expansion valve 15 lies in the refrigerant line 3 leading to the evaporator 1, which extends in the form of pipe coils through the plate pack, as shown schematically in FIG. 5, whereupon this pipe coil 3.
- the solenoid valve 16 is arranged.
- FIG. 3 shows, only the pipe coils 3 arranged in the lower region of the plate pack are connected to the distributor 12 via the pipes 13, as is also shown schematically in FIG. 5.
- the heater 11 switched off in the tubes 10, the refrigerant flowing in via the pipeline evaporating in the evaporator 1, cooling the evaporator fins 2 in a manner known per se and flowing out again via the line 17.
- the line 17 is shut off via the solenoid valve 16 and liquid refrigerant is controlled in via the electronic expansion valve 15.
- the coils 3 are injected so that it collects in the heated pipes 10 while the pipes lying above them Pipe coils 3 are free of liquid refrigerant.
- the tubes 10 are heated so that refrigerant vapor can rise through the coils 3 and be deposited on the cold areas of the evaporator in order to specifically target them heat.
- the pipes 4 like the coils 3 according to FIG. 3, are in good thermal contact with the fins 2 of the evaporator, so that the cold that is generated by ice on the fins 2 is on the pipes 4 is transmitted.
- the heating device which is arranged inside the refrigerant container according to FIGS. 2 and 4 can also be provided outside.
- the electronically controlled expansion valve 15 After the electronically controlled expansion valve 15 has injected liquid refrigerant for the operation of the defrost heater, blocks the expansion valve 15 the refrigerant line, so that the refrigerant evaporated in the heated tubes 10 can condense within the evaporator.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
Description
Verfahren und Vorricht ung zum Abtauen Defrosting method and apparatus
von Eis an einem Verdampfer eines Kühl¬of ice on an evaporator of a refrigerator
aggregatsaggregates
Die Erfindung betrifft ein Verfahren zum Abtauen von Eis oder Reif an den Oberflächen eines Verdampfers eines Kühlaggregats und dergleichen.The invention relates to a method for defrosting ice or frost on the surfaces of an evaporator of a cooling unit and the like.
Es ist bekannt, zum Abtauen von Eis, das sich nach einer gewissen Betriebszeit eines Kühlaggregats auf den Verdampferoberflächen bildet, Heizschlangen zwischen den Lamellen des Verdampfers vorzusehen, die über ihre Längsabmessung mehr oder weniger gleichmäßig beheizt werden. Bildet sich beispielsweise nur auf einem Teil der Verdampferoberfläche Eis und wird ein Abtausignal von einem Eismelder oder von einer Abtauschaltuhr abgegeben, so wird die gesamte Verdampferoberfläche durch diese bekannte Abtauheizung beheizt, obwohl nur der mit Eis behaftete Flächenteil beheizt werden müßte. Auf diese Weise wird mit. der bekannten Abtauheizung Energie vergeudet, insbesondere wenn man auch berücksichtigt, daß nach Abschalten der Abtauheizung die dann relativ hohe Temperatur am Verdampfer wieder auf den Sollwert der Kühltemperatur abgebaut werden muß.For defrosting ice, which forms after a certain operating time of a cooling unit on the evaporator surfaces, it is known to provide heating coils between the fins of the evaporator, which are heated more or less uniformly over their longitudinal dimension. If, for example, ice forms only on a part of the evaporator surface and a defrost signal is emitted by an ice detector or by an exchange timer, the entire evaporator surface is heated by this known defrost heater, although only the surface part covered with ice would have to be heated. This way, with. the well-known defrost heater Energy wasted, especially if one also takes into account that after the defrost heater is switched off, the then relatively high temperature on the evaporator must be reduced again to the setpoint of the cooling temperature.
Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung der eingangs angegebenen Art so auszubilden, daß beim Abtauvorgang erheblich an Energie eingespart werden kann.The invention has for its object to provide a method and an apparatus of the type specified in such a way that considerable energy can be saved during the defrosting process.
Diese Aufgabe wird durch die Merkmale im Kennzeichen des Anspruchs 1 sowie durch die Merkmale im Kennzeichen des Anspruchs 2 gelöst. Durch Beheizen eines flüssigen Kältemittels wird dieses verdampft, wobei der Kältemitteldampf je nach Art des verwendeten Kältemittels eine bestimmte Temperatur im Plusbereich von beispielsweise 50° C hat. Der Kältemitteldampf hat ferner die Eigenschaft, daß er an den Stellen kondensiert, welche die niedrigste Temperatur aufweisen. In einem nur teilweise vereisten Verdampfer weisen jene Flächen die niedrigste Temperatur auf, an denen sich Eis gebildet hat. Dementsprechend kondensiert der warme Kältemitteldampf nur an diesen Stellen und heizt diese dadurch auf, so daß einzelne vereiste Stellen gezielt abgetaut werden und dadurch erheblich an Energie eingespart werden kann. Vorteilhafte Ausgestaltungen der Erfindung sind in der nachfolgenden Beschreibung und in den weiteren Ansprüchen angegeben.This object is achieved by the features in the characterizing part of claim 1 and by the features in the characterizing part of claim 2. By heating a liquid refrigerant, this is evaporated, the refrigerant vapor depending on the type of refrigerant used having a certain temperature in the plus range of, for example, 50 ° C. The refrigerant vapor also has the property of condensing at the lowest temperature locations. In an evaporator that is only partially iced up, those surfaces have the lowest temperature at which ice has formed. Accordingly, the warm refrigerant vapor only condenses at these points and heats them up, so that individual iced-up points are deliberately defrosted and thus considerable energy savings can be made. Advantageous embodiments of the invention are specified in the following description and in the further claims.
Beispielsweise Ausführungsformen der Erfindung werden nachfolgend anhand der Zeichnung näher erläutert. Es zeigenFor example, embodiments of the invention are explained in more detail below with reference to the drawing. Show it
Fig. 1 in einer perspektivischen Darstellung eines Verdampfers eine erste Ausführungsform,1 is a perspective view of an evaporator, a first embodiment,
Fig. 2 in einer Ansieht entsprechend Fig. 1 eine zweite Ausführungsform,2 in a view corresponding to FIG. 1, a second embodiment,
Fig. 3 in gleicher Darstellung eine dritte Ausführungsform,3 shows a third embodiment in the same representation,
Fig. 4 einen schematischen Längsschni.tt durch ein Heizrohr nach Fig. 3, undFig. 4 is a schematic longitudinal section through a heating tube according to Fig. 3, and
Fig. 5 schematisch die Abtauheizung nach Fig. 3 und 4 im Kältemittelkreislauf.Fig. 5 shows schematically the defrost heater according to Fig. 3 and 4 in the refrigerant circuit.
In Fig. 1 ist allgemein mit 1 ein Verdampfer mit etwa parallel zueinander liegenden Lamellen 2 bezeichnet, wobei durch das Lamellenpaket in an sich bekannter Weise Rohrleitungen 3 für das Kältemittel führen. Zur Ausbildung einer Abtauheizung sind bei dem Ausführungsbeispiel, nach Fig. 1 mehrere Rohre 4 durch das Lamellenpaket geführt, die auf der Vorderseite 5 des Lamellenpaketes vorstehen. Die Rohre 4 liegen mit einer geringen Steigung in dem Lamellenpaket, so daß der auf der Vorderseite 5 vorstehende Abschnitt der Rohre 4 tiefer liegt als deren Ende auf der mit 6 bezeichneten Rückseite. In den einzelnen Rohren 4 befindet Kältemittel, das sich aufgrund der Steigung der Rohre 4 in flüssigem Zustand .auf dem auf der Vorderseite 5 vorstehenden Abschnitt dieser Rohre sammelt. An den freien Enden der Rohre 4 ist jeweils eine Heizpatrone 7 angebracht. Die gegenüberliegenden, höher liegenden Enden der Rohre 4 können jeweils verschlossen oder auch zumindest teilweise miteinander verbunden sein.In Fig. 1, generally 1 denotes an evaporator with fins 2 lying approximately parallel to one another, pipelines 3 for the refrigerant leading through the fin stack in a manner known per se. To form a defrost heater, in the exemplary embodiment, according to FIG. 1, a plurality of tubes 4 are guided through the plate pack and protrude on the front side 5 of the plate pack. The tubes 4 lie with a slight slope in the plate pack, so that the section of the tubes 4 protruding on the front side 5 is lower than their end on the rear side labeled 6. In the individual tubes 4 there is refrigerant which, due to the slope of the tubes 4, collects in a liquid state on the section of these tubes protruding from the front side 5. A heating cartridge 7 is attached to the free ends of the tubes 4. The opposite, higher ends of the tubes 4 can each be closed or at least partially connected to one another.
Sobald ein Abtausignal abgegeben wird, werden die Heizpatronen 7 eingeschaltet, wobei das flüssige Kältemittel in den vorstehenden, tiefer liegenden Abschnitten der Rohre 4 verdampft wird und sich der warme Kältemitteldampf im wesentlichen nur an den mit Eis versehenen, kalten Bereichen niederschlägt und damit diese aufheizt. Das kondensierte Kältemittel läuft zurück in den vorstehenden Abschnitt der Rohre 4 auf der Vorderseite 5.As soon as a defrost signal is emitted, the heating cartridges 7 are switched on, the liquid refrigerant being evaporated in the above, lower-lying sections of the tubes 4 and the warm refrigerant vapor essentially being deposited only on the cold areas provided with ice and thus heating them up. The condensed refrigerant runs back into the protruding section of the pipes 4 on the front side 5.
Die Rohre 4 sind derart über die Querschnittsflache bzw. Vorderseite 5 des Verdampfers verteilt, daß durch diese Abtauheizung in Form der mit Kältemittel teilweise gefüllten Rohre 4 alle Verdampferoberflachen beheizt werden können.The tubes 4 are distributed over the cross-sectional area or front side 5 of the evaporator in such a way that this defrost heating in the form of those partially filled with refrigerant Pipes 4 all evaporator surfaces can be heated.
Bei der Ausführungsforra nach Fig. 2 sind die mit einer geringen Steigung durch das Lamellenpaket geführten Rohre 4 am tiefer liegenden Ende mit einem gemeinsamen Kältemittelbehälter 8 verbunden, in dem eine durch gestrichelte Linien angedeutete Heizung 9 angeordnet ist. Die höher liegenden, gegenüberliegenden Enden der Rohre 4 können auf der Rückseite 6 des Lamellenpakets geschlossen ausgebildet oder zumindest teilweise miteinander verbunden sein. Der Betrieb dieser Abtauheizung erfolgt in der gleichen Weise wie der nach Fig. 1.In the embodiment according to FIG. 2, the tubes 4, which are guided through the fin package with a slight slope, are connected at the lower end to a common refrigerant container 8, in which a heater 9, indicated by dashed lines, is arranged. The higher, opposite ends of the tubes 4 can be closed on the rear side 6 of the plate pack or at least partially connected to one another. The operation of this defrost heater is carried out in the same way as that of FIG. 1.
Fig. 3 zeigt eine abgewandelte Ausführungsform, bei der auf der Unterseite längs des Lamellenpakets über dessen Längsabmessung zwei Rohre 10 verlaufen, von denen eines in Fig. 4 schematisch in einem Längsschnitt dargestellt ist. Das Rohr 10 bildet einen Behälter für das Kältemittel, wobei etwa konzentrisch in dem Rohr 10 eine stabförmige Heizung 11 bzw. eine Heizeinrichtung mit einem stabförmigen Gehäuse angeordnet ist, wobei die Anschlüsse für die Heizung nicht dargestellt sind. Die beiden Rohre 10 körnen geneigt angeordnet sein, wobei die beiden tiefer liegenden Enden über ein Verteilerrohr 12 miteinander verbunden sind, während die höher liegenden Enden auf der gegenüberliegenden Seite des Lamellenpakets geschlossen ausgebildet oder miteinander verbunden seinlkönnen. Die Heizrohre 10, die in dem Kältemittelkreislauf des während des normalen Betriebs durch den Verdampfer strömenden Kältemittels liegen, können auch waagerecht angeordnet sein. In Fig. 3 sind die in Fig. 5 schematisch angedeuteten Anschlüsse an den Kältemittelkreislauf nicht wiedergegeben. Von dem Verteilerrohr 12 führen einzelne Rohre 13 zu den durch den Verdampfer führenden Rohrschlangen 3 , durch die während des Kältebetriebs des Verdampfers Kältemittel strömt.FIG. 3 shows a modified embodiment in which two tubes 10 run on the underside along the plate pack over its longitudinal dimension, one of which is shown schematically in FIG. 4 in a longitudinal section. The tube 10 forms a container for the refrigerant, a rod-shaped heater 11 or a heating device with a rod-shaped housing being arranged approximately concentrically in the tube 10, the connections for the heater not being shown. The two pipes 10 can be arranged at an incline, the two lower ends being connected to one another via a distributor pipe 12, while the higher ends on the opposite side of the plate pack can be closed or connected to one another. The heating tubes 10, which lie in the refrigerant circuit of the refrigerant flowing through the evaporator during normal operation, can also be arranged horizontally. The connections to the refrigerant circuit which are indicated schematically in FIG. 5 are not shown in FIG. 3. From the distributor pipe 12, individual pipes 13 lead to the coils 3 leading through the evaporator, through which refrigerant flows during the cooling operation of the evaporator.
Die beiden mit einer Heizung versehenen Rohre 10 auf der Unterseite des Verdampfers sind an oder in einer nicht dargestellten Tauwasserschale angeordnet, so daß diese beiden Rohre zugleich als Wannenheizung für das Tauwasser dienen.The two tubes 10 provided with a heater on the underside of the evaporator are arranged on or in a condensate tray, not shown, so that these two tubes also serve as a heater for the condensate.
Fig. 5 zeigt schematisch das Ausführungsbeispiel nach Fig. 3 und 4 in Verbindung mit einem elektronisch gesteuerten Expansionsventil 15 und einem Magnetventil 16. DasFig. 5 shows schematically the embodiment of FIGS. 3 and 4 in connection with an electronically controlled expansion valve 15 and a solenoid valve 16. Das
Expansionsventil 15 liegt in der zum Verdampfer 1 führenden Kältemittelleitung 3 , die sich in Form von Rohrschlangen durch das Lamellenpaket erstreckt, wie schematisch in Fig. 5 wiedergegeben, worauf diese Rohrschlange 3. über den in Fig. 3 wiedergegebenen Verteiler 12 in die beheizten Rohre 10 münden, deren gegenüberliegende Enden in die vom Verdampfer wegführende Kältemittelleitung 17 münden, in der das Magnetventil 16 angeordnet ist.Expansion valve 15 lies in the refrigerant line 3 leading to the evaporator 1, which extends in the form of pipe coils through the plate pack, as shown schematically in FIG. 5, whereupon this pipe coil 3. Via the distributor 12 shown in FIG. 3 into the heated pipes 10 open, whose opposite ends open into the refrigerant line 17 leading away from the evaporator, in which the solenoid valve 16 is arranged.
Wie Fig. 3 zeigt, sind lediglich die im unteren Bereich des Lamellenpakets angeordneten Rohrschlangen 3 über die Rohrleitungen 13 mit dem Verteiler 12 verbunden, wie dies schematisch auch in Fig. 5 dargestellt ist. Während des normalen Betriebs des Kühlaggregats ist die Heizung 11 in den Rohren 10 ausgeschaltet, wobei das über die Rohrleitung zuströmende Kältemittel im Verdampfer 1 verdampft, in an sich bekannter Weise die Verdampferlamellen 2 abkühlt und über die Leitung 17 wieder abströmt. Sobald ein Signal für den Betrieb der Abtauheizung abgegeben ist, wird über das Magnetventil 16 die Leitung 17 abgesperrt und über das elektronische Expansionsventil 15 flüssiges Kältemittel gesteuert in. die Rohrschlangen 3 eingespritzt, so daß es sich in den beheizten Rohren 10 sammelt, während die darüberliegenden Rohrschlangen 3 frei von flüssigem Kältemittel sind. Nachdem auf diese Weise der für die Abtauheizung erforderliche Vorrat an flüssigem Kältemittel in den beheizten Rohren 10 vorhanden ist, werden die Rohre 10 beheizt, so daß Kältemitteldampf durch die Rohrschlangen 3 aufsteigen und sich an den kalten Bereichen des Verdampfers niederschlagen kann, um gezielt diese zu beheizen.As FIG. 3 shows, only the pipe coils 3 arranged in the lower region of the plate pack are connected to the distributor 12 via the pipes 13, as is also shown schematically in FIG. 5. During normal operation of the cooling unit, the heater 11 switched off in the tubes 10, the refrigerant flowing in via the pipeline evaporating in the evaporator 1, cooling the evaporator fins 2 in a manner known per se and flowing out again via the line 17. As soon as a signal for the operation of the defrost heater is issued, the line 17 is shut off via the solenoid valve 16 and liquid refrigerant is controlled in via the electronic expansion valve 15. The coils 3 are injected so that it collects in the heated pipes 10 while the pipes lying above them Pipe coils 3 are free of liquid refrigerant. After the supply of liquid refrigerant required for the defrost heating is present in the heated tubes 10, the tubes 10 are heated so that refrigerant vapor can rise through the coils 3 and be deposited on the cold areas of the evaporator in order to specifically target them heat.
Bei der Ausführungsform nach den Fig. 1 und 2 stehen die Rohre 4 wie die Rohrschlangen 3 nach Fig. 3 in gutem Wärmeleitkontakt mit den Lamellen 2 des Verdampfers, damit die Kälte, die durch Eis auf den Lamellen 2 erzeugt wird, auf die Rohre 4 übertragen wird.In the embodiment according to FIGS. 1 and 2, the pipes 4, like the coils 3 according to FIG. 3, are in good thermal contact with the fins 2 of the evaporator, so that the cold that is generated by ice on the fins 2 is on the pipes 4 is transmitted.
Die Heizeinrichtung, die nach Fig. 2 und 4 innerhalb des Kältemittelbehälters angeordnet ist, kann auch außerhalb vorgesehen werden.The heating device which is arranged inside the refrigerant container according to FIGS. 2 and 4 can also be provided outside.
Nachdem das elektronisch gesteuerte Expansionsventil 15 flüssiges Kältemittel für den Betrieb der Abtauheizung eingespritzt hat, sperrt das Expansionsventil 15 die Kältemittelleitung ab, so daß das in den beheizten Rohren 10 verdampfte Kältemittel innerhalb des Verdampfers kondensieren kann.After the electronically controlled expansion valve 15 has injected liquid refrigerant for the operation of the defrost heater, blocks the expansion valve 15 the refrigerant line, so that the refrigerant evaporated in the heated tubes 10 can condense within the evaporator.
Anstelle der beiden dargestellten Rohre 10 kann auch nur ein Rohr 10 oder mehrere beheizte Rohre vorgesehen werden. Instead of the two pipes 10 shown, only one pipe 10 or more heated pipes can be provided.
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3808230.6 | 1988-03-11 | ||
| DE19883808230 DE3808230A1 (en) | 1988-03-11 | 1988-03-11 | METHOD AND DEVICE FOR DEFROSTING ICE ON AN EVAPORATOR OF A COOLING UNIT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1989008807A1 true WO1989008807A1 (en) | 1989-09-21 |
Family
ID=6349524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1989/000216 Ceased WO1989008807A1 (en) | 1988-03-11 | 1989-03-03 | Process and device for defrosting the evaporator of a cooling unit |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE3808230A1 (en) |
| WO (1) | WO1989008807A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2708092A1 (en) * | 1993-07-21 | 1995-01-27 | Frigotecnica Ind Chiaven | Device for defrosting, particularly for defrosting eutectic plates, on refrigerated vehicles. |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100431348B1 (en) * | 2002-03-20 | 2004-05-12 | 삼성전자주식회사 | refrigerator |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2487662A (en) * | 1946-06-04 | 1949-11-08 | Westinghouse Electric Corp | Defrosting device for refrigeration apparatus |
| US2526032A (en) * | 1948-10-11 | 1950-10-17 | Francis L La Porte | Defrosting method and apparatus for refrigeration systems |
| US2553657A (en) * | 1947-03-06 | 1951-05-22 | Francis L La Porte | Refrigerator defrosting method and apparatus |
| US2554848A (en) * | 1948-02-06 | 1951-05-29 | Tenney Engineering Inc | Method and apparatus for automatically defrosting evaporators |
| DE820143C (en) * | 1946-02-05 | 1951-11-08 | Westinghouse Electric Corp | Chiller |
| US2685780A (en) * | 1951-09-27 | 1954-08-10 | Philco Corp | Refrigerating system with defrosting circuit |
| US2746270A (en) * | 1952-07-08 | 1956-05-22 | Gen Electric | Defrosting arrangements for refrigerating systems |
| US2902835A (en) * | 1955-09-09 | 1959-09-08 | Bohn Aluminium & Brass Corp | Refrigeration defrosting system |
| US2987601A (en) * | 1959-08-19 | 1961-06-06 | Glenco Refrigeration Co | Defroster |
-
1988
- 1988-03-11 DE DE19883808230 patent/DE3808230A1/en not_active Withdrawn
-
1989
- 1989-03-03 WO PCT/EP1989/000216 patent/WO1989008807A1/en not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE820143C (en) * | 1946-02-05 | 1951-11-08 | Westinghouse Electric Corp | Chiller |
| US2487662A (en) * | 1946-06-04 | 1949-11-08 | Westinghouse Electric Corp | Defrosting device for refrigeration apparatus |
| US2553657A (en) * | 1947-03-06 | 1951-05-22 | Francis L La Porte | Refrigerator defrosting method and apparatus |
| US2554848A (en) * | 1948-02-06 | 1951-05-29 | Tenney Engineering Inc | Method and apparatus for automatically defrosting evaporators |
| US2526032A (en) * | 1948-10-11 | 1950-10-17 | Francis L La Porte | Defrosting method and apparatus for refrigeration systems |
| US2685780A (en) * | 1951-09-27 | 1954-08-10 | Philco Corp | Refrigerating system with defrosting circuit |
| US2746270A (en) * | 1952-07-08 | 1956-05-22 | Gen Electric | Defrosting arrangements for refrigerating systems |
| US2902835A (en) * | 1955-09-09 | 1959-09-08 | Bohn Aluminium & Brass Corp | Refrigeration defrosting system |
| US2987601A (en) * | 1959-08-19 | 1961-06-06 | Glenco Refrigeration Co | Defroster |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2708092A1 (en) * | 1993-07-21 | 1995-01-27 | Frigotecnica Ind Chiaven | Device for defrosting, particularly for defrosting eutectic plates, on refrigerated vehicles. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3808230A1 (en) | 1989-09-21 |
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