WO2005106360A1 - Refrigeration device with condensed water evaporation system - Google Patents

Refrigeration device with condensed water evaporation system Download PDF

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Publication number
WO2005106360A1
WO2005106360A1 PCT/EP2005/051955 EP2005051955W WO2005106360A1 WO 2005106360 A1 WO2005106360 A1 WO 2005106360A1 EP 2005051955 W EP2005051955 W EP 2005051955W WO 2005106360 A1 WO2005106360 A1 WO 2005106360A1
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WO
WIPO (PCT)
Prior art keywords
storage volume
condensed water
evaporation tray
refrigerating appliance
evaporator
Prior art date
Application number
PCT/EP2005/051955
Other languages
German (de)
French (fr)
Inventor
Wolfgang Nuiding
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 BSH Bosch und Siemens Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Priority to EP05743140A priority Critical patent/EP1745251A1/en
Publication of WO2005106360A1 publication Critical patent/WO2005106360A1/en

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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
    • F25D21/14—Collecting or removing condensed and defrost water; Drip trays
    • 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
    • F25D17/062—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 in household refrigerators
    • 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
    • F25D21/08—Removing frost by electric heating
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/141—Removal by evaporation
    • F25D2321/1411—Removal by evaporation using compressor heat
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/144—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans
    • F25D2321/1442—Collecting condense or defrost water; Removing condense or defrost water characterised by the construction of drip water collection pans outside a refrigerator
    • 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
    • F25D2321/00—Details or arrangements for defrosting; Preventing frosting; Removing condensed or defrost water, not provided for in other groups of this subclass
    • F25D2321/14—Collecting condense or defrost water; Removing condense or defrost water
    • F25D2321/145—Collecting condense or defrost water; Removing condense or defrost water characterised by multiple collecting pans

Definitions

  • the present invention relates to a refrigeration device with an evaporation system for removing condensation, which accumulates on the evaporator during operation of the refrigeration device.
  • a drainage channel or tray under the evaporator in the body of such a refrigerator which collects condensate flowing out of the evaporator, and which is connected via a hole in the body of the refrigerator to an outside evaporation tray into which the condensate drain and can evaporate in it.
  • the evaporation tray is usually mounted on a compressor of the refrigeration device in order to use the waste heat generated during the operation of the compressor to heat the condensate in the evaporation tray and thus accelerate its evaporation.
  • Another problem that occurs in particular with self-defrosting freezers is that condensate from the evaporator only occurs at large intervals when it is defrosted, but then in large quantities.
  • An evaporation tray that is able to absorb these quantities with certainty must be generous in size; however, the larger the evaporation tray and the amount of water contained therein, the less the heating of the water that can be achieved with the waste heat of the compressor, and the lower the effectiveness of the evaporation tray.
  • the inflow of the defrost water into the evaporation bowl is limited in quantity and evened out.
  • the condensation of the evaporation tray in small amounts, for. B. supplied dropwise. This can ensure that the evaporation tray always contains only a small amount of water, which warms up effectively and evaporates quickly due to the limited heat output available at the location of the evaporation tray.
  • the drainage channel and / or the evaporation tray serves as a storage volume for the back-up defrost water.
  • the drain channel serves as a storage volume
  • the drain channel is designed as a pipe, at least in the backflow area.
  • a chamber can be integrated into the pipeline to expand the storage volume.
  • the volume resistance can be formed by a simple bottleneck such as a capillary.
  • the evaporator is assigned a defrost heater, then is the defrosting of the defrost heater, expressed as defrosted water amount per unit time, a multiple expediently the throughput of the bottleneck, so that the defrosting heater of " ⁇ on the throughput of the bottleneck addition quantity of water supplied to accumulates in the storage volume.
  • the volume resistance can also include a blocking member, which allows the inflow of water from the storage volume into the evaporation tray to be completely prevented if necessary.
  • the evaporation tray is preferably divided into a plurality of basins, which differ in terms of the heating power received per unit area of their base area. As a result, the water in the basin that receives the highest heating output per unit area reaches a higher temperature than in the case of an undivided evaporation tray, which improves the efficiency of the evaporation.
  • the drain channel preferably opens into the basin, which receives the highest heating output per unit area, so that this basin is primarily supplied with condensed water.
  • the channel comprises a pipeline between the evaporator and the evaporation tray
  • the storage volume can be realized as a chamber arranged in the pipeline. Another option is to integrate the storage volume into the evaporation tray itself.
  • FIG. 1 shows a schematic section through a refrigerator according to the invention
  • FIG. 2 shows an enlarged detail of the refrigeration device from FIG. 1;
  • FIG. 3 shows a perspective view of an evaporation tray and a conduit for condensation water opening therein;
  • FIG. 4 is a perspective view of an alternative embodiment of an evaporation tray.
  • the refrigeration device shown schematically in section in FIG. 1 comprises a heat-insulating housing with a body 1 and a door 2 articulated thereon, which enclose an interior 3.
  • a chamber 6 is divided, in which a plate-shaped evaporator 5 is arranged.
  • the chamber 6 communicates with the interior 3 via openings 7 in the rear wall.
  • a refrigerant circuit extends from a high-pressure outlet of a compressor 8 via a condenser 9 attached to the outside of the rear of the body 1 and the evaporator 5 to a suction connection of the compressor 8.
  • the compressor 8 is in a recess 10 near the floor on the rear of the body 1 housed below the evaporator 5.
  • a (not shown) fan at one of the openings 7 drives an air exchange between the interior 3 and the chamber 6, with air humidity from the interior 3 being deposited on the evaporator 5.
  • the refrigerator is a refrigerator, depending on the temperature set for the interior 3, the temperature of the evaporator 5 is always positive, or at least it reaches positive values between two operating phases of the compressor 8, so that the moisture precipitating on the evaporator 5 is continuous can flow away or at least can flow away at least during a stationary phase of the compressor 8, between two operating phases, so that no larger amounts of moisture collect on the evaporator 5.
  • the temperature of the evaporator 5 usually remains below 0 ° C. even during a standstill phase of the compressor 8, so that the evaporator 5 gradually over the course of many successive standstill and operating phases of the compressor icy.
  • a heater (not shown) is arranged on the evaporator 5, which allows the evaporator to be heated to temperatures above 0 ° C. and the condensate to drain while the compressor 8 is stationary.
  • the condensed water collects in one as in the other case in a trough 11 at the bottom of the chamber 6, from the lowest point of which a pipe 12 extends.
  • This Pipeline leads through the insulation layer of the body 1 through to a chamber 13 forming a storage volume for the condensed water and, through a capillary 14 extending from the bottom of the chamber 13, into an evaporation bowl 15 which is mounted on the compressor 8 in close thermal contact with the latter ,
  • the pipe 12 leading from the trough 11 to the chamber 13 has an inner diameter of several millimeters, so that water drops can flow down the inner wall of the pipe 12 without being overwhelmed by capillary forces spread the entire cross-section of the pipeline. Air which is displaced from the chamber 13 by the condensate flowing down can leave it via the pipeline 12.
  • the diameter of the pipeline 12 can also be made smaller, provided that it remains large enough to allow the water to flow out of the channel 11 at the rate at which it runs from the evaporator 5 into the channel.
  • the free cross section of the capillary 14 extending from the bottom of the chamber 13 is substantially smaller than that of the pipeline 12, so that the water can only get from the chamber 13 into the evaporation tray 15 located thereunder in the form of individual drops.
  • the purpose of the bottleneck formed by the capillary 14 is to even out the inflow of condensed water into the evaporation tray 15.
  • FIG 3 shows a perspective view of a special embodiment of the evaporation tray 15 and of the channel opening into it.
  • the section of the channel shown in the figure between the storage volume or the chamber 13 and the evaporation tray 15 is designed here as a pipeline 16 with a shut-off valve 17.
  • the shut-off valve 17 is automatically opened and closed by a control circuit, not shown.
  • the control circuit can open the valve, for example, in the course of a period of a predetermined duration for an adjustable period of time; very low mean flow rates from the storage volume 13 to the evaporation tray 15 can be achieved with little effort.
  • the evaporation tray 15 of FIG. 3 is divided into a plurality of basins 18 to 23 by web-shaped partitions, the basin 18 bounded by the lowest partitions being located at the highest point of the bottom of the evaporation tray 15. This point corresponds to the apex of the compressor 8 engaging into the evaporation tray from below and is exposed to the strongest heat flow from the compressor under all basins per unit of its base area.
  • the basins communicate with each other through flat cutouts 24 on the upper edges of the partition walls, so that whenever one basin is filled to overflow, the next one is flooded through such a cutout 24.
  • the condensed water first arrives from the pipeline 16 into the basin 18, where it can reach a comparatively high temperature and accordingly evaporates quickly.
  • FIG. 4 shows an evaporation tray 25 according to a modified embodiment of the invention.
  • This evaporation tray is characterized by an additional basin 26, the bottom of which is higher than the evaporation basin 18 to 23 corresponding to the embodiment from FIG. 3.
  • the pipeline 12 emanating from the condensate collecting channel 11 opens directly, without an intermediate storage volume and without a bottleneck, into the basin 26, which here takes on the function of a storage volume.
  • a bottleneck between the storage volume of the basin 26 and the first evaporation basin 18 is here formed by a capillary tube 27, which is simply plugged onto an edge of the basin 26 and of which a first end, not shown in the figure, is located in the basin 26 nearby the bottom and the other of which are above the evaporation basin 18 at a lower level than the bottom of the basin 26. If condensate flows through the pipeline 12 into the basin 26, it rises by capillary action in the tube 27 to above the upper edge of the basin 26 and finally reaches the basin 18 dropwise by siphon action, where it evaporates rapidly or when the basin 18 is full, flows into one of the following pools to evaporate.

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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)
  • Removal Of Water From Condensation And Defrosting (AREA)

Abstract

The invention relates to a refrigerator device, comprising an evaporator (5) and a drain channel (12, 13, 14), for the removal of condensed water from the evaporator (5) and introduction of the condensed water to an evaporation basin (15). A storage volume (13) for condensed water is arranged in the drain channel (12, 13, 14) and, upstream of the storage volume (13), a flow resistance (14) is embodied to back the condensed water up in the storage volume (13).

Description

Beschreibung Kältegerät mit Kondenswasserverdunstungssystem Description of refrigerator with condensate evaporation system
[001] Die vorliegende Erfindung betrifft ein Kältegerät mit einem Verdunstungssystem zur Beseitigung von Kondenswasser, das sich während des Betriebs des Kältegeräts an dessen Verdampfer ansammelt.The present invention relates to a refrigeration device with an evaporation system for removing condensation, which accumulates on the evaporator during operation of the refrigeration device.
[002] Herkömmlicherweise befindet sich unter dem Verdampfer im Korpus eines solchen Kältegeräts eine Ablaufrinne oder -schale, die vom Verdampfer abfließendes Kondenswasser auffängt, und die über eine Bohrung im Korpus des Kältegerätes mit einer außerhalb angebrachten Verdunstungsschale verbunden ist, in die das Kondenswasser ablaufen und darin verdunsten kann. Die Verdunstungsschale ist üblicherweise auf einem Verdichter des Kältegerätes montiert, um mit der im Betrieb des Verdichters erzeugten Abwärme das Kondenswasser in der Verdunstungsschale zu erwärmen und so dessen Verdunstung zu beschleunigen.Conventionally, there is a drainage channel or tray under the evaporator in the body of such a refrigerator, which collects condensate flowing out of the evaporator, and which is connected via a hole in the body of the refrigerator to an outside evaporation tray into which the condensate drain and can evaporate in it. The evaporation tray is usually mounted on a compressor of the refrigeration device in order to use the waste heat generated during the operation of the compressor to heat the condensate in the evaporation tray and thus accelerate its evaporation.
[003] In den letzten Jahren sind erhebliche Anstrengungen unternommen worden, den Energieverbrauch der Kältegeräte durch wirksamere Isolation und Optimierung der Effizienz ihrer Kältemaschine zu verbessern. Dies hat dazu geführt, dass bei modernen Kältegeräten der Anteil der Verdichterlaufzeit an der Gesamtbetriebszeit des Kältegeräts sowie die Abwärmeleistung des Verdichters während seiner Laufzeit geringer geworden sind. Die zum Erwärmen des Kondenswassers zur Verfügung stehende Abwärme ist daher bei modernen Kältegeräten knapper als bei älteren Geräten. Wenn jedoch ein Mangel an Abwärme dazu führt, dass das Wasser in der Verdunstungsschale langsamer verdunstet, als es vom Verdampfer nachläuft, läuft die Verdunstungsschale schließlich über, so dass Wasser austritt, das zu Schäden im Gerät und in dessen Umgebung führen kann. Eine zusätzliche Wärmeenergiequelle zum Fördern der Verdunstung bereitzustellen, ist nicht erwünscht, da dies den spezifischen Energieverbrauch des Gerätes vergrößern würde. Es werden daher Lösungen benötigt, die es erlauben, die Effektivität der Verdunstungsschale zu verbessern, ohne hierfür zusätzliche Energie aufzuwenden.In recent years, considerable efforts have been made to improve the energy consumption of the refrigeration devices through more effective insulation and optimization of the efficiency of their refrigeration machine. This has led to the fact that the proportion of the compressor running time in the total operating time of the cooling device and the waste heat output of the compressor have decreased during its running time in modern refrigeration devices. The waste heat available to heat the condensed water is therefore scarcer in modern refrigeration devices than in older devices. However, if a lack of waste heat causes the water in the evaporation pan to evaporate more slowly than it runs from the evaporator, the evaporation pan eventually overflows, causing water to escape, which can damage the device and its surroundings. Providing an additional source of thermal energy to promote evaporation is not desirable as this would increase the specific energy consumption of the device. Solutions are therefore needed which make it possible to improve the effectiveness of the evaporation tray without using additional energy.
[004] Ein weiteres Problem, das insbesondere bei selbstabtauenden Gefriergeräten auftritt, ist, dass Kondenswasser vom Verdampfer nur in großen Zeitabständen anfällt, wenn dieser abgetaut wird, dann aber in großen Mengen. Eine Verdunstungsschale, die in der Lage ist, diese Mengen mit Sicherheit aufzunehmen, muss großzügig bemessen sein; je größer jedoch die Verdunstungsschale und die darin enthaltene Wassermenge ist, um so geringer ist die Erwärmung des Wassers, die mit der Abwärme des Verdichters erreichbar ist, und um so geringer ist folglich die Effektivität der Verdunstungsschale.Another problem that occurs in particular with self-defrosting freezers is that condensate from the evaporator only occurs at large intervals when it is defrosted, but then in large quantities. An evaporation tray that is able to absorb these quantities with certainty must be generous in size; however, the larger the evaporation tray and the amount of water contained therein, the less the heating of the water that can be achieved with the waste heat of the compressor, and the lower the effectiveness of the evaporation tray.
[005] Es besteht daher die Aufgabe ein Kältegerät vorzuschlagen, das durch einfache technische Maßnahmen in der Lage ist, auch beim Anfall größerer Mengen von Kondenswasser dieses effizient zu erwärmen und zu verdunsten.It is therefore the task of proposing a refrigerator that is simple technical measures is able to efficiently heat and evaporate condensate even when large amounts of condensate are produced.
[006] Diese Aufgaben werden gelöst durch ein Kältegerät mit den Merkmalen des Anspruchs 1.[006] These objects are achieved by a refrigeration device with the features of claim 1.
[007] Dadurch, dass in dem vom Verdampfer zur Verdunstungsschale führenden Ablaufkanal ein Durchgangswiderstand zum Rückstauen von Abtauwasser gebildet ist, wird der Zulauf des Abtauwassers in die Verdunstungsschale mengenmäßig begrenzt und vergleichmäßigt. Idealerweise wird das Kondenswasser der Verdunstungsschale in kleinen Mengen z. B. tröpfchenweise zugeführt. Dadurch kann sichergestellt werden, dass in der Verdunstungsschale stets nur eine kleine Wassermenge enthalten ist, die sich durch die begrenzte zur Verfügung stehende Wärmeleistung am Ort der Verdunstungsschale wirksam erwärmt und zügig verdunstet. Der Ablaufkanal und/oder die Verdunstungsschale dient als Speichervolumen für das zurückgestaute Abtauwasser. Für den Fall, dass der Ablaufkanal als Speichervolumen dient, ist der Ablaufkanal zumindest im Rückstaubereich als Rohrleitung ausgebildet. In die Rohrleitung kann zur Erweiterung des Speichervolumens eine Kammer integriert sein.Characterized in that in the discharge channel leading from the evaporator to the evaporation bowl a volume resistance for backing up defrost water is formed, the inflow of the defrost water into the evaporation bowl is limited in quantity and evened out. Ideally, the condensation of the evaporation tray in small amounts, for. B. supplied dropwise. This can ensure that the evaporation tray always contains only a small amount of water, which warms up effectively and evaporates quickly due to the limited heat output available at the location of the evaporation tray. The drainage channel and / or the evaporation tray serves as a storage volume for the back-up defrost water. In the event that the drain channel serves as a storage volume, the drain channel is designed as a pipe, at least in the backflow area. A chamber can be integrated into the pipeline to expand the storage volume.
[008] Der Durchgangswiderstand kann durch einen einfachen Engpass wie etwa eine Kapillarleitung gebildet sein.The volume resistance can be formed by a simple bottleneck such as a capillary.
[009] Wenn dem Verdampfer eine Abtauheizung zugeordnet ist, dann beträgt die Abtauleistung der Abtauheizung, ausgedrückt als abgetaute Wassermenge pro Zeiteinheit, zweckmäßigerweise ein Mehrfaches des Durchsatzes des Engpasses, so dass die von "■ der Abtauheizung über den Durchsatz des Engpasses hinaus gelieferte Wassermenge sich in dem Speichervolumen sammelt.[009] If the evaporator is assigned a defrost heater, then is the defrosting of the defrost heater, expressed as defrosted water amount per unit time, a multiple expediently the throughput of the bottleneck, so that the defrosting heater of "■ on the throughput of the bottleneck addition quantity of water supplied to accumulates in the storage volume.
[010] Der Durchgangswiderstand kann auch ein Sperrglied umfassen, das es erlaubt, den Zufluss von Wasser vom Speichervolumen in die Verdunstungsschale im Bedarfsfalle vollständig zu unterbinden.The volume resistance can also include a blocking member, which allows the inflow of water from the storage volume into the evaporation tray to be completely prevented if necessary.
[011] Vorzugsweise ist die Verdunstungsschale in eine Mehrzahl von Becken unterteilt, die sich hinsichtlich der pro Flächeneinheit ihrer Grundfläche empfangenen Heizleistung unterscheiden. Dadurch erreicht das Wasser in demjenigen Becken, das die höchste Heizleistung pro Flächeneinheit empfängt, eine höhere Temperatur als im Falle einer nicht unterteilten Verdunstungsschale, was die Effizienz der Verdunstung verbessert. Vorzugsweise mündet der Ablaufkanal in das Becken, das die höchste Heizleistung pro Flächeneinheit empfängt, so dass dieses Becken vorrangig mit Kondenswasser versorgt wird.[011] The evaporation tray is preferably divided into a plurality of basins, which differ in terms of the heating power received per unit area of their base area. As a result, the water in the basin that receives the highest heating output per unit area reaches a higher temperature than in the case of an undivided evaporation tray, which improves the efficiency of the evaporation. The drain channel preferably opens into the basin, which receives the highest heating output per unit area, so that this basin is primarily supplied with condensed water.
[012] Wenn der Kanal eine Rohrleitung zwischen dem Verdampfer und der Verdunstungsschale umfasst, so kann das Speichervolumen als eine in der Rohrleitung angeordnete Kammer realisiert sein. Eine andere Möglichkeit ist, das Speichervolumen in die Verdunstungsschale selbst zu integrieren. [013] Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen mit Bezug auf die beigefügten Figuren. Es zeigen:If the channel comprises a pipeline between the evaporator and the evaporation tray, the storage volume can be realized as a chamber arranged in the pipeline. Another option is to integrate the storage volume into the evaporation tray itself. Further features and advantages of the invention will become apparent from the following description of exemplary embodiments with reference to the accompanying figures. Show it:
[014] Fig. 1 einen schematischen Schnitt durch ein erfmdungsgemäßes Kältegerät;[014] FIG. 1 shows a schematic section through a refrigerator according to the invention;
[015] Fig. 2 ein vergrößertes Detail des Kältegeräts aus Fig. 1;[015] FIG. 2 shows an enlarged detail of the refrigeration device from FIG. 1;
[016] Fig. 3 eine perspektivische Ansicht einer Verdunstungsschale und eines darin mündenden Kanals für Kondenswasser; und3 shows a perspective view of an evaporation tray and a conduit for condensation water opening therein; and
[017] Fig. 4 eine perspektivische Ansicht einer alternativen Ausgestaltung einer Verdunstungsschale.4 is a perspective view of an alternative embodiment of an evaporation tray.
[018] Das in Fig. 1 schematisch im Schnitt gezeigte Kältegerät umfasst einen wärmeisolierendes Gehäuse mit einem Korpus 1 und einer daran angelenkten Tür 2, die einen Innenraum 3 umschließen. An der Rückseite des durch eine Mehrzahl von Fachböden 4 in Fächer unterteilten Innenraums 3 ist eine Kammer 6 abgeteilt, in der ein plat- tenförmiger Verdampfer 5 angeordnet ist. Die Kammer 6 kommuniziert mit dem Innenraum 3 über Öffnungen 7 der Rückwand. Ein Kältemittelkreislauf erstreckt sich von einem Hochdruckausgang eines Verdichters 8 über einen außen an der Rückseite des Korpus 1 angebrachten Verflüssiger 9 und den Verdampfer 5 zu einem Saug- anschluss des Verdichters 8. Der Verdichter 8 ist in einer bodennahen Nische 10 an der Rückseite des Korpus 1 unterhalb des Verdampfers 5 untergebracht.The refrigeration device shown schematically in section in FIG. 1 comprises a heat-insulating housing with a body 1 and a door 2 articulated thereon, which enclose an interior 3. At the rear of the interior 3, which is divided into compartments by a plurality of shelves 4, a chamber 6 is divided, in which a plate-shaped evaporator 5 is arranged. The chamber 6 communicates with the interior 3 via openings 7 in the rear wall. A refrigerant circuit extends from a high-pressure outlet of a compressor 8 via a condenser 9 attached to the outside of the rear of the body 1 and the evaporator 5 to a suction connection of the compressor 8. The compressor 8 is in a recess 10 near the floor on the rear of the body 1 housed below the evaporator 5.
[019] Ein (nicht dargestellter) Ventilator an einer der Öffnungen 7 treibt einen Luftaustausch zwischen dem Innenraum 3 und der Kammer 6 an, wobei sich Luftfeuchtigkeit aus dem Innenraum 3 am Verdampfer 5 niederschlägt. Wenn es sich bei dem Kältegerät um einen Kühlschrank handelt, so ist je nach eingestellter Temperatur des Innenraums 3 die Temperatur des Verdampfers 5 ständig positiv oder zumindest erreicht sie zwischen zwei Betriebsphasen des Verdichters 8 positive Werte, so dass die sich am Verdampfer 5 niederschlagende Feuchtigkeit kontinuierlich abfließen kann oder doch zumindest während einer Standphase des Verdichters 8, zwischen zwei Betriebsphasen, im Wesentlichen abfließen kann, so dass sich keine größeren Feuchtigkeitsmengen am Verdampfer 5 sammeln.A (not shown) fan at one of the openings 7 drives an air exchange between the interior 3 and the chamber 6, with air humidity from the interior 3 being deposited on the evaporator 5. If the refrigerator is a refrigerator, depending on the temperature set for the interior 3, the temperature of the evaporator 5 is always positive, or at least it reaches positive values between two operating phases of the compressor 8, so that the moisture precipitating on the evaporator 5 is continuous can flow away or at least can flow away at least during a stationary phase of the compressor 8, between two operating phases, so that no larger amounts of moisture collect on the evaporator 5.
[020] Wenn es sich bei dem Kältegerät um ein Gefriergerät handelt, so bleibt die Temperatur des Verdampfers 5 auch während einer Standphase des Verdichters 8 normalerweise unter 0°C, so dass im Laufe vieler aufeinanderfolgender Stand- und Betriebsphasen des Verdichters der Verdampfer 5 allmählich vereist. In diesem Fall ist am Verdampfer 5 eine (nicht dargestellte) Heizung angeordnet, die es erlaubt, während einer Standphase des Verdichters 8 den Verdampfer auf Temperaturen über 0°C zu erwärmen und das Kondenswasser zum Ablaufen zu bringen.If the refrigerator is a freezer, the temperature of the evaporator 5 usually remains below 0 ° C. even during a standstill phase of the compressor 8, so that the evaporator 5 gradually over the course of many successive standstill and operating phases of the compressor icy. In this case, a heater (not shown) is arranged on the evaporator 5, which allows the evaporator to be heated to temperatures above 0 ° C. and the condensate to drain while the compressor 8 is stationary.
[021] Das Kondenswasser sammelt sich im einen wie im anderen Falle in einer Rinne 11 am Boden der Kammer 6, von deren tiefstem Punkt eine Rohrleitung 12 ausgeht. Diese Rohrleitung führt durch die Isolationsschicht des Korpus 1 hindurch zu einer ein Speichervolumen für das Kondenswasser bildenden Kammer 13 und, durch eine vom boden der Kammer 13 ausgehende Kapillare 14, in eine Verdunstungsschale 15, die auf dem Verdichter 8 in engem thermischen Kontakt mit diesem montiert ist.The condensed water collects in one as in the other case in a trough 11 at the bottom of the chamber 6, from the lowest point of which a pipe 12 extends. This Pipeline leads through the insulation layer of the body 1 through to a chamber 13 forming a storage volume for the condensed water and, through a capillary 14 extending from the bottom of the chamber 13, into an evaporation bowl 15 which is mounted on the compressor 8 in close thermal contact with the latter ,
[022] Wie die vergrößerte Darstellung der Fig. 2 deutlich macht, hat die von der Rinne 11 zur Kammer 13 führende Rohrleitung 12 einen Innendurchmesser von mehreren Millimetern, so dass Wassertropfen an der Innenwand der Rohrleitung 12 herabfließen können, ohne sich durch Kapillarkräfte über den ganzen Querschnitt der Rohrleitung auszubreiten. Luft, die vom herabfließenden Kondenswasser aus der Kammer 13 verdrängt wird, kann diese über die Rohrleitung 12 verlassen.As the enlarged representation of FIG. 2 clearly shows, the pipe 12 leading from the trough 11 to the chamber 13 has an inner diameter of several millimeters, so that water drops can flow down the inner wall of the pipe 12 without being overwhelmed by capillary forces spread the entire cross-section of the pipeline. Air which is displaced from the chamber 13 by the condensate flowing down can leave it via the pipeline 12.
[023] Wenn auf andere Weise für eine Entlüftung der Kammer 13 gesorgt ist, kann der Durchmesser der Rohrleitung 12 auch kleiner gemacht werden, sofern er groß genug bleibt, um ein Abfließen des Wassers aus der Rinne 11 mit der Rate zu ermöglichen, mit der es vom Verdampfer 5 in die Rinne läuft.If ventilation of the chamber 13 is provided in another way, the diameter of the pipeline 12 can also be made smaller, provided that it remains large enough to allow the water to flow out of the channel 11 at the rate at which it runs from the evaporator 5 into the channel.
[024] Der freie Querschnitt der vom Boden der Kammer 13 ausgehenden Kapillare 14 ist wesentlich kleiner als der der Rohrleitung 12, so dass das Wasser nur in Form einzelner Tropfen von der Kammer 13 in die darunter befindliche Verdunstungsschale 15 gelangen kann. Zweck des durch die Kapillare 14 gebildeten Engpasses ist, den Zufluss von Kondenswasser in die Verdunstungsschale 15 zu vergleichmäßigen. D.h., im Falle eines Kühlgerätes, bei dem die Zuflussrate jeweils im Takt der Betriebs- und Standphasen des Verdichters 8 schwankt, sollte sie einerseits groß genug sein, damit das im Laufe einer Betriebsphase des Verdichters zugeflossene Kondenswasser im Laufe dieser Betriebsphase und der darauf folgenden Standphase vollständig wieder abfließt, andererseits möglichst klein, um den Zustrom des Kondenswassers in die Verdunstungsschale 15 zeitlich so gleichmäßig wie möglich zu verteilen.The free cross section of the capillary 14 extending from the bottom of the chamber 13 is substantially smaller than that of the pipeline 12, so that the water can only get from the chamber 13 into the evaporation tray 15 located thereunder in the form of individual drops. The purpose of the bottleneck formed by the capillary 14 is to even out the inflow of condensed water into the evaporation tray 15. In other words, in the case of a cooling device in which the inflow rate fluctuates in time with the operating and stationary phases of the compressor 8, it should be large enough so that the condensed water that has flowed in during an operating phase of the compressor during this operating phase and the subsequent stationary phase drains completely again, on the other hand as small as possible in order to distribute the inflow of the condensed water into the evaporation tray 15 as evenly as possible over time.
[025] Fig. 3 zeigt eine perspektivische Ansicht einer besonderen Ausgestaltung der Verdunstungsschale 15 und des in sie mündenden Kanals. Der in der Figur dargestellte Abschnitt des Kanals zwischen dem Speichervolumen bzw. der Kammer 13 und der Verdunstungsschale 15 ist hier als eine Rohrleitung 16 mit Absperrventil 17 ausgebildet. Das Absperrventil 17 wird von einer nicht dargestellten Steuerschaltung automatisch geöffnet und geschlossen. Die Steuerschaltung kann das Ventil beispielsweise im Laufe einer Periode von vorgegebener Dauer für jeweils eine einstellbare Zeitspanne öffnen; so sind sehr niedrige mittlere Durchflussraten von dem Speichervolumen 13 zur Verdunstungsschale 15 mit geringem Aufwand realisierbar.3 shows a perspective view of a special embodiment of the evaporation tray 15 and of the channel opening into it. The section of the channel shown in the figure between the storage volume or the chamber 13 and the evaporation tray 15 is designed here as a pipeline 16 with a shut-off valve 17. The shut-off valve 17 is automatically opened and closed by a control circuit, not shown. The control circuit can open the valve, for example, in the course of a period of a predetermined duration for an adjustable period of time; very low mean flow rates from the storage volume 13 to the evaporation tray 15 can be achieved with little effort.
[026] Denkbar wäre auch, einen Wasserstandssensor an der Verdunstungsschale 15 anzubringen, anhand von dessen Messergebnissen die Steuerschaltung das Absperrventil 17 jeweils dann öffnet, wenn ein vorgegebener Mindestwasserstand in der Verdunstungsschale 15 unterschritten ist, und es wieder schließt, sobald ein höherer, zweiter Wasserstand überschritten ist.It would also be conceivable to attach a water level sensor to the evaporation tray 15, based on the measurement results of which the control circuit opens the shut-off valve 17 whenever a predetermined minimum water level in the evaporation tray 15 is undershot and closes again as soon as a higher, second one Water level is exceeded.
[027] Die Verdunstungsschale 15 der Fig. 3 ist durch stegförmige Zwischenwände in eine Mehrzahl von Becken 18 bis 23 unterteilt, wobei sich das von den niedrigsten Zwischenwänden begrenzte Becken 18 am höchsten Punkt des Bodens der Verdunstungsschale 15 befindet. Dieser Punkt entspricht dem Scheitel des von unten in die Verdunstungsschale eingreifenden Verdichters 8 und ist pro Einheit seiner Grundfläche dem stärksten Wärmefluss vom Verdichter unter allen Becken ausgesetzt. Die Becken kommunizieren untereinander jeweils durch flache Ausschnitte 24 an den Oberkanten der Zwischenwände, so dass immer dann, wenn ein Becken bis zum Überlaufen gefüllt ist, durch einen solchen Ausschnitt 24 das nächste geflutet wird.The evaporation tray 15 of FIG. 3 is divided into a plurality of basins 18 to 23 by web-shaped partitions, the basin 18 bounded by the lowest partitions being located at the highest point of the bottom of the evaporation tray 15. This point corresponds to the apex of the compressor 8 engaging into the evaporation tray from below and is exposed to the strongest heat flow from the compressor under all basins per unit of its base area. The basins communicate with each other through flat cutouts 24 on the upper edges of the partition walls, so that whenever one basin is filled to overflow, the next one is flooded through such a cutout 24.
[028] Das Kondenswasser gelangt aus der Rohrleitung 16 zunächst in das Becken 18, wo es eine vergleichsweise hohe Temperatur erreichen kann und dementsprechend schnell verdunstet.The condensed water first arrives from the pipeline 16 into the basin 18, where it can reach a comparatively high temperature and accordingly evaporates quickly.
[029] Wenn der Zufluss von Kondenswasser zum Becken 18 zeitweilig dessen Verdunstungsleistung überschreitet, strömt Wasser in das Nachbarbecken 19, und, wenn dieses voll ist, in eines der darauffolgenden Becken 20 bis 23 über. Wenn der Zustrom nachlässt, verdunstet wiederum das Wasser im Becken 18 am effektivsten, so dass dieses Becken bald wieder in der Lage ist, weiteres Wasser aufzunehmen.If the inflow of condensed water to the pool 18 temporarily exceeds its evaporation capacity, water flows into the neighboring pool 19 and, when it is full, into one of the subsequent pools 20 to 23. When the inflow subsides, the water in the basin 18 evaporates again most effectively, so that this basin will soon be able to absorb more water.
[030] Fig. 4 zeigt eine Verdunstungsschale 25 gemäß einer abgewandelten Ausgestaltung der Erfindung. Diese Verdunstungsschale zeichnet sich durch ein zusätzliches Becken 26 aus, dessen Boden höher liegt als die der Ausgestaltung aus Fig. 3 entsprechenden Verdunstungsbecken 18 bis 23. Die von der das Kondenswasser sammelnden Rinne 11 ausgehende Rohrleitung 12 mündet direkt, ohne zwischengeschaltetes Speichervolumen und ohne Engpass, in das Becken 26, das hier die Funktion eines Speichervolumens übernimmt. Ein Engpass zwischen dem Speichervolumen des Beckens 26 und dem ersten Verdunstungsbecken 18 ist hier durch ein Kapillarrohr 27 gebildet, das einfach auf einen Rand des Beckens 26 aufgesteckt ist und von dem ein erstes, in der Figur nicht sichtbares Ende sich im Becken 26 in der Nähe von dessen Boden und das andere sich über dem Verdunstungsbecken 18 auf einem tieferen Niveau als der Boden des Beckens 26 befindet. Wenn durch die Rohrleitung 12 Kondenswasser in das Becken 26 fließt, so steigt es durch Kapillarwirkung in dem Rohr 27 bis über die Oberkante des Beckens 26 an und gelangt schließlich durch Siphonwirkung tropfenweise in das Becken 18, wo es zügig verdunstet oder, wenn das Becken 18 voll ist, in eines der nachfolgenden Becken weiterfließt, um dort zu verdunsten. 4 shows an evaporation tray 25 according to a modified embodiment of the invention. This evaporation tray is characterized by an additional basin 26, the bottom of which is higher than the evaporation basin 18 to 23 corresponding to the embodiment from FIG. 3. The pipeline 12 emanating from the condensate collecting channel 11 opens directly, without an intermediate storage volume and without a bottleneck, into the basin 26, which here takes on the function of a storage volume. A bottleneck between the storage volume of the basin 26 and the first evaporation basin 18 is here formed by a capillary tube 27, which is simply plugged onto an edge of the basin 26 and of which a first end, not shown in the figure, is located in the basin 26 nearby the bottom and the other of which are above the evaporation basin 18 at a lower level than the bottom of the basin 26. If condensate flows through the pipeline 12 into the basin 26, it rises by capillary action in the tube 27 to above the upper edge of the basin 26 and finally reaches the basin 18 dropwise by siphon action, where it evaporates rapidly or when the basin 18 is full, flows into one of the following pools to evaporate.

Claims

Ansprüche Expectations
[001] Kältegerät mit einem Verdampfer (5), einem Ablaufkanal (12, 13, 14; 12, 13, 16, 17; 12, 26, 27) zum Abführen von Kondenswasser von dem Verdampfer (5) und Zuführen des Kondenswassers zu einer Verdunstungsschale (15, 25), dadurch gekennzeichnet, dass in dem Ablaufkanal (12, 13, 14; 12, 13, 16, 17; 12, 26, 27) ein Speichervolumen (13, 26) für Kondenswasser und stromabwärts von dem Speichervolumen (13, 26) ein Durchgangswiderstand (14, 17, 27) zum Rückstauen von Kondenswasser in das Speichervolumen (13, 26) gebildet ist.Refrigeration device with an evaporator (5), an outlet channel (12, 13, 14; 12, 13, 16, 17; 12, 26, 27) for removing condensed water from the evaporator (5) and supplying the condensed water to one Evaporation tray (15, 25), characterized in that in the outlet channel (12, 13, 14; 12, 13, 16, 17; 12, 26, 27) a storage volume (13, 26) for condensed water and downstream of the storage volume ( 13, 26) a volume resistance (14, 17, 27) for backing up condensed water into the storage volume (13, 26) is formed.
[002] Kältegerät nach Anspruch 1, dadurch gekennzeichnet, dass dem Verdampfer (5) eine Abtauheizung zugeordnet ist.Refrigerating appliance according to claim 1, characterized in that the evaporator (5) is assigned a defrost heater.
[003] Kältegerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Durchgangswiderstand einen Engpass (14, 27) umfasst.[003] Refrigeration device according to claim 1 or 2, characterized in that the volume resistance comprises a bottleneck (14, 27).
[004] Kältegerät nach Anspruch 2 und Anspruch 3, dadurch gekennzeichnet, dass die Abtauleistung der Abtauheizung, ausgedrückt als abgetaute Wassermenge pro Zeiteinheit, ein Mehrfaches des Durchsatzes des Engpasses ist.Refrigerating appliance according to claim 2 and claim 3, characterized in that the defrosting power of the defrost heater, expressed as the amount of defrosted water per unit of time, is a multiple of the throughput of the bottleneck.
[005] Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Durchgangswiderstand ein Sperrglied (17) umfasst.[005] Refrigerating appliance according to one of the preceding claims, characterized in that the volume resistance comprises a blocking element (17).
[006] Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Durchgangswiderstand durch ein Kapillarrohr gebildet ist.[006] Refrigerating appliance according to one of the preceding claims, characterized in that the volume resistance is formed by a capillary tube.
[007] Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verdunstungsschale (15, 25) durch einen Verdichter (8) des Kältegeräts erwärmt ist.[007] Refrigeration device according to one of the preceding claims, characterized in that the evaporation tray (15, 25) is heated by a compressor (8) of the refrigeration device.
[008] Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Verdunstungsschale (15) in eine Mehrzahl von Becken (18, 19, 20, 21, 22, 23) unterteilt ist, die sich hinsichtlich der pro Flächeneinheit ihrer Grundfläche empfangenen Heizleistung unterscheiden.Refrigerating appliance according to one of the preceding claims, characterized in that the evaporation tray (15) is divided into a plurality of basins (18, 19, 20, 21, 22, 23), which are in terms of the heating power received per unit area of their base area differ.
[009] Kältegerät nach Anspruch 8, dadurch gekennzeichnet, dass der Ablaufkanal in demjenigen Becken (18) der Verdunstungsschale (15) mündet, das die höchste Heizleistung pro Flächeneinheit empfängt.Refrigerating appliance according to claim 8, characterized in that the drain channel opens into that basin (18) of the evaporation tray (15) which receives the highest heating power per unit area.
[010] Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Kanal eine Rohrleitung (12, 14) umfasst und das Speichervolumen durch die Rohrleitung (12, 14) gebildet ist.Refrigerating appliance according to one of the preceding claims, characterized in that the channel comprises a pipeline (12, 14) and the storage volume is formed by the pipeline (12, 14).
[011] Kältegerät nach Anspruch 10, dadurch gekennzeichnet, dass die Rohrleitung (12, 14) eine Kammer (13) aufweist, durch die das Speichervolumen erweitert ist.[011] Refrigeration device according to claim 10, characterized in that the pipeline (12, 14) has a chamber (13) through which the storage volume is expanded.
[012] Kältegerät nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass das Speichervolumen (26) in die Verdunstungsschale (25) integriert ist. [012] Refrigerating appliance according to one of claims 1 to 9, characterized in that the storage volume (26) is integrated in the evaporation tray (25).
PCT/EP2005/051955 2004-05-04 2005-04-29 Refrigeration device with condensed water evaporation system WO2005106360A1 (en)

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US20120036874A1 (en) * 2010-08-12 2012-02-16 Jianwu Li Active cooling of a compressor in an appliance
US8534083B2 (en) 2010-08-12 2013-09-17 General Electric Company Evaporative cooling condenser for household appliance
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CN102322718B (en) * 2011-06-10 2015-05-20 海信（山东）冰箱有限公司 Detection device and method of defrosting device for refrigerator
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CN102317719B (en) * 2009-02-13 2014-08-20 Bsh博世和西门子家用电器有限公司 Refrigerator with internal evaporator
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CN104720443A (en) * 2015-03-19 2015-06-24 苏州市小伙伴电器有限公司 Food refrigeration display cabinet capable of preventing water storage tank from water overflowing

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RU2382297C2 (en) 2010-02-20
EP1745251A1 (en) 2007-01-24

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