EP2880385A1 - Refrigerator having an evaporation tray - Google Patents

Refrigerator having an evaporation tray

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Publication number
EP2880385A1
EP2880385A1 EP13737271.0A EP13737271A EP2880385A1 EP 2880385 A1 EP2880385 A1 EP 2880385A1 EP 13737271 A EP13737271 A EP 13737271A EP 2880385 A1 EP2880385 A1 EP 2880385A1
Authority
EP
European Patent Office
Prior art keywords
control unit
compressor motor
rotation
evaporation tray
storage chamber
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP13737271.0A
Other languages
German (de)
French (fr)
Other versions
EP2880385B1 (en
Inventor
Achim Paulduro
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP2880385A1 publication Critical patent/EP2880385A1/en
Application granted granted Critical
Publication of EP2880385B1 publication Critical patent/EP2880385B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/025—Motor control arrangements
    • 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

Definitions

  • the present invention relates to a refrigeration appliance, in particular a household refrigeration appliance such as a refrigerator or freezer, with an evaporation tray for evaporating condensate derived from a storage chamber of the device and a compressor through the waste heat, the evaporation tray is heated.
  • a refrigeration appliance in particular a household refrigeration appliance such as a refrigerator or freezer, with an evaporation tray for evaporating condensate derived from a storage chamber of the device and a compressor through the waste heat, the evaporation tray is heated.
  • Water level in the evaporation tray is critically high, are switched to the less efficient mode, in order to generate more waste heat and to evaporate the water in the evaporation tray faster.
  • a prerequisite for operation of the compressor even in the less efficient mode is that the storage chamber of the refrigeration appliance actually has cooling requirements. If you were to run the compressor without cooling the storage chamber, only to have enough heat to evaporate the condensation available, this would be highly energy-efficient, since only a portion of the electrical power absorbed by the compressor is actually converted into waste heat to evaporate the dew
  • cooling the storage chamber below a desired storage temperature brings no benefit or even cause frost damage to the refrigerated goods in the worst case.
  • Object of the present invention is to provide a refrigeration device with evaporation tray, in which, if necessary, at any time to provide heat to promote evaporation in the evaporation tray, without having its own
  • Heating device is required.
  • Compressor motor provides suitable current, and a Walker Häsmodus is switchable, in which it provides an unsuitable for driving the rotation current, i. a current that flows though the compressor motor and there releases Joule heat, but does not drive rotation.
  • such an unsuitable current for driving a rotation may be a direct current to which a single winding of the compressor motor is applied.
  • thermal load is distributed to different windings of the compressor motor.
  • the control unit comprises an inverter.
  • the compressor motor may comprise, in a conventional manner, at least three terminals which supply different windings of the compressor motor and are to be energized in a first order in order to drive a rotation of the compressor motor in a working direction.
  • the control circuit can then be set up in the
  • Heating mode to energize the terminals in a different order from the first order.
  • the windings of the compressor motor are so with the
  • Terminals are connected to generate a magnetic field with a first rotational direction rotating when energizing the terminals in the first order, and the armature of the motor starts to rotate by trying to align itself in the rotating field.
  • the second order may then be suitably chosen such that a magnetic field rotating with an alternating sense of rotation or an oscillating magnetic field is generated.
  • the armature tries to align itself in such a magnetic field, here the constant change of the field direction prevents the armature from being accelerated and a rotation starting up.
  • the control unit should be set up appropriately, the heat demand of
  • control unit To estimate the heat demand, the control unit with a at the
  • Humidity sensor With the aid of the measured values of such a sensor, the amount of moisture contained in the air of the storage chamber can be estimated, which in the near future will reach the evaporation tray as condensate.
  • the control unit can also be connected to a door opening sensor to estimate when and to what extent fresh and moist ambient air enters the storage chamber.
  • Fig. 1 is a schematic section through a household refrigerator, to which the present invention is applicable;
  • FIG. 2 is a schematic circuit diagram of an inverter used in the refrigerator of FIG. 1; FIG. and
  • Fig. 3 shows the timing of the inverter in the
  • Compressor motor of the refrigerator applied switching states Compressor motor of the refrigerator applied switching states.
  • the household refrigerating appliance shown in Fig. 1, here a refrigerator has in a usual way a heat-insulating housing with a body 1 and a lying outside the cutting plane of the figure door, which limits a storage chamber 3 together with the body 1.
  • the storage chamber 3 is here by a on its rear wall 2 between a
  • Nofrost freezer as this, at least in a defrosting phase of its evaporator, also releases condensation.
  • the base extends through the
  • Condensation water which precipitates at the area of the inner container cooled by the evaporator 4 and flows downwards, traps.
  • a pipeline 8 leads from the lowest point of the gutter 7 through the insulating foam layer through to an evaporation tray 9, which in a machine room 5 on a housing of a
  • Compressor 6 is mounted to be heated by waste heat of the compressor, in particular its drive motor.
  • a corresponding pipeline could emanate from the bottom of a chamber receiving the evaporator.
  • the compressor 6 is common in the art and therefore not specifically in a figure
  • a pressure connection of the compressor 6 in a row one e.g. Condenser mounted outside on the rear wall 2, a throttle and the evaporator 4 are connected.
  • An outlet of the evaporator 4 is in turn connected to a suction port of the compressor 6.
  • An electronic control unit 10 comprises a microprocessor or microcontroller which is connected to a temperature sensor 11 arranged on the storage chamber 3 in order to control the operation of the compressor 6 on the basis of the temperature of the storage chamber 3.
  • the control unit 10 is also adapted to estimate the amount of heat needed by the evaporation tray 9 to evaporate the condensation water flowing in it fast enough so that the evaporation tray 9 does not overflow.
  • a water level sensor 12 e.g. a float switch in the
  • Evaporation tray 9 may be arranged, and the control unit 10 detects a
  • Numerous other approaches for assessing the heat demand are conceivable, even those that do not require immediate measurement of the water level in the evaporation tray 9.
  • a temperature sensor may be provided which detects a heating resulting from the operation of the compressor 6. From the rate of warming can affect the amount of water in the
  • Evaporation tray 9 are closed.
  • Storage chamber 3 may be provided.
  • a temperature sensor arranged on the evaporator 4, the
  • Speed can be measured, with which cools when turning on the compressor 6, the evaporator 4, and from this, the control unit 10 can infer the rate at which precipitates moisture on the evaporator 4, which later in the
  • FIG. 2 shows a block diagram of the control unit 10 and the motor 13 of the compressor 6 which it controls.
  • a microprocessor 14 controls six switches SU 1, SV 1, SW 1, SU 2, SV 2, SW 2 of an inverter 15, of which the switches SU 1, SV 1 , SW1 are arranged between a positive supply potential (+) and a terminal or phase U, V or W of the motor 13, and the switches SU2, SV2, SW2 each between one of these three terminals or phases and a negative supply potential (-) arranged are.
  • the switches may, in a manner known per se, be IGBTs with a freewheeling diode or MOSFETs connected in parallel.
  • the microprocessor 14 can with the above-mentioned, with the sensors 1 1, 12th be connected microprocessor identical, or it may be a second, responsible only for the sequence control of the motor 13 microprocessor. In the latter case, the two microprocessors will usually be mounted separately from each other, one in the vicinity of a user interface whose inputs it processes, the other 14 adjacent to the motor 13 controlled by it.
  • Three stator windings 16 of the motor 13 are arranged here in a star connection between the phases U, V, W. It will be obvious to a person skilled in the art that a triangular circuit is also suitable, or that the number of phases and windings can also be greater than three.
  • the microprocessor 14 periodically generates various switching states over time t, here six, designated by a, b, f in FIG.
  • FIG. 3 shows, for each of the switching states a to f, the state of the switches of the converter 15 and the resulting voltages at the connection terminals U, V, W of the motor 13.
  • the switches SU1, SW1 are closed.
  • the switches SU2, SW2, SV1 are open and the switch SV2 is pulsed open and closed.
  • Terminals U, V and V, W of the motor 13, and the resulting magnetic fields of the stator windings 16 are superimposed to a space vector u a .
  • the switches SV2, SW2 are open, SU2, SV1, SW1 are closed and SU1 is pulse-width-modulated; accordingly, current flows through the terminals U; V and U, W, resulting in a space vector u, which is opposite to u a by 60 ° in
  • the frequency with which the states a to f follow each other must be adapted to the rotational frequency of the armature. It may for example be controlled by means of a Hall sensor 17, which is arranged on the motor 13 and is exposed to the field of its rotating armature, or a sensorless
  • control unit 10 can energize the connection terminals U, V, W of the motor 13 in the heating operating mode.
  • One possibility is, for example, one of the switching states a to f over the entire duration of the heating operating mode
  • a second possibility is to energize the connection terminals U, V, W so that an oscillating space vector is obtained instead of a rotating space vector. This is possible, for example, by periodically switching between the states a and d. If the switching frequency between the two states is high, then the duration of, for example, the state a is not sufficient to bring the rotor into a stable equilibrium position corresponding to the space vector u a , and any rotation of the rotor that has already begun is immediately decelerated again in state d, so that the rotor trembles at most slightly, but no rotation gets going. If the switching frequency is so low that a stable equilibrium position is reached in state a, then this corresponds to
  • the distribution of the heating power to the stator windings 16 in this embodiment is the same as in the first considered case in which the switching state a is maintained throughout the heating operation. However, since the armature is not rotated, it is possible here and there to occasionally switch from pair of states a, d to another pair such as b, e or c, f so as to distribute the heating power more uniformly to the windings. According to a third embodiment, three also change in the heating mode

Abstract

A refrigerator, in particular a domestic refrigerator, comprises at least a storage chamber (3), an evaporation tray (9) for evaporating condensation water which drains from the storage chamber (3), a compressor motor (13) which is arranged in thermal contact with the evaporation tray (9), and a control unit (10) which can be switched over between a driving operating mode, in which it supplies a current which is suitable for driving a rotation of the compressor motor (13), and a heating operating mode, in which it supplies a current which is not suitable for driving the rotation.

Description

Kältegerät mit Verdunstungsschale  Refrigeration unit with evaporation tray
Die vorliegende Erfindung betrifft ein Kältegerät, insbesondere ein Haushaltskältegerät wie etwa einen Kühl- oder Gefrierschrank, mit einer Verdunstungsschale zum Verdunsten von aus einer Lagerkammer des Geräts abgeleitetem Tauwasser und einem Verdichter, durch dessen Abwärme die Verdunstungsschale beheizbar ist. The present invention relates to a refrigeration appliance, in particular a household refrigeration appliance such as a refrigerator or freezer, with an evaporation tray for evaporating condensate derived from a storage chamber of the device and a compressor through the waste heat, the evaporation tray is heated.
Verbesserungen der Isolation und der Kälteerzeugung führen an modernen Kältegeräten dazu, dass das Verhältnis von anfallendem Tauwasser zur am Verdichter verfügbaren Abwärme immer ungünstiger wird. Wenn der Verdichter nicht genügend Abwärme liefert, um das Tauwasser zu verdunsten, besteht die Gefahr, dass die Verdunstungsschale überläuft und auslaufendes Wasser zu Schäden im Kältegerät oder dessen Umgebung führt. Um eine ausreichende Verdunstung gewährleisten zu können, wurde z.B. in DE 102 08 558 A1 vorgeschlagen, an der Verdunstungsschale eine elektrische Heizeinrichtung und einen Wasserstandssensor anzubringen, der bei Überschreitung eines Improvements in insulation and cooling on modern refrigeration appliances mean that the ratio of accumulating condensate to waste heat available at the compressor is becoming increasingly unfavorable. If the compressor does not provide enough heat to evaporate the condensation, there is a risk that the evaporation tray overflows and leaking water can cause damage to the refrigerator or its environment. In order to ensure sufficient evaporation, e.g. in DE 102 08 558 A1 proposes to attach to the evaporation tray an electric heater and a water level sensor, the exceeding of a
Grenzwasserstandes die Heizeinrichtung einschaltet. Eine solche Heizeinrichtung muss einerseits zwar in engem thermischen Kontakt mit dem Wasser in der Limit water level, the heater turns on. Such a heater must on the one hand in close thermal contact with the water in the
Verdunstungsschale stehen, andererseits aber muss sie vor unmittelbarem Kontakt mit dem Wasser dauerhaft sicher geschützt angebracht und kontaktiert sein, was die On the other hand, it must be permanently protected against direct contact with the water and kept in contact, which is the
Fertigungskosten eines damit ausgestatteten Kältegeräts erhöht. Increased manufacturing costs of a refrigeration device equipped with it.
In der nicht vorveröffentlichten deutschen Patentanmeldung 10201 1085153.4, eingereicht am 25.10.201 1 , ist ein Kältegerät mit Verdunstungsschale und einem drehzahlgeregelten Verdichter beschrieben. Der Verdichter ist zwischen zwei Betriebsmodi umschaltbar, die sich in ihrer Drehzahl und infolgedessen auch in der Effizienz der Kälteerzeugung unterscheiden. Während bei niedrigem Wasserstand in der Verdunstungsschale der Verdichter im hoch effizienten Betriebsmodus arbeiten sollte, kann er, wenn der In the non-prepublished German patent application 10201 1085153.4, filed on 25.10.201 1, a refrigerator with evaporation tray and a variable speed compressor is described. The compressor can be switched between two operating modes, which differ in their speed and consequently also in the efficiency of refrigeration. While at low water level in the evaporating tray the compressor should operate in highly efficient operating mode, if the compressor is operating at high efficiency
Wasserstand in der Verdunstungsschale kritisch hoch ist, in den minder effizienten Modus umgeschaltet werden, um auf diese Weise mehr Abwärme zu erzeugen und das Wasser in der Verdunstungsschale schneller zu verdunsten. Voraussetzung für einen Betrieb des Verdichters auch im minder effizienten Modus ist jedoch, dass die Lagerkammer des Kältegeräts tatsächlich Kühlbedarf hat. Würde man den Verdichter auch ohne Kühlbedarf der Lagerkammer betreiben, nur um genügend Wärme zum Verdunsten des Tauwassers zur Verfügung zu haben, so wäre dies energetisch hoch ineffizient, da nur ein Teil der vom Verdichter aufgenommenen elektrischen Leistung tatsächlich in Abwärme zum Verdunsten des Tauwassers umgewandelt wird, eine Kühlung der Lagerkammer unter eine Soll-Lagertemperatur jedoch keinen Nutzen bringt oder im schlimmsten Fall sogar Frostschäden am Kühlgut hervorrufen kann. Water level in the evaporation tray is critically high, are switched to the less efficient mode, in order to generate more waste heat and to evaporate the water in the evaporation tray faster. However, a prerequisite for operation of the compressor even in the less efficient mode is that the storage chamber of the refrigeration appliance actually has cooling requirements. If you were to run the compressor without cooling the storage chamber, only to have enough heat to evaporate the condensation available, this would be highly energy-efficient, since only a portion of the electrical power absorbed by the compressor is actually converted into waste heat to evaporate the dew However, cooling the storage chamber below a desired storage temperature brings no benefit or even cause frost damage to the refrigerated goods in the worst case.
Aufgabe der vorliegenden Erfindung ist, ein Kältegerät mit Verdunstungsschale zu schaffen, bei dem bei Bedarf zu jeder Zeit Wärme zum Fördern der Verdunstung in der Verdunstungsschale bereitgestellt werden kann, ohne dass hierfür eine eigene Object of the present invention is to provide a refrigeration device with evaporation tray, in which, if necessary, at any time to provide heat to promote evaporation in the evaporation tray, without having its own
Heizvorrichtung erforderlich ist. Heating device is required.
Die Aufgabe wird gelöst, indem bei einem Kältegerät, insbesondere einem The problem is solved by a refrigeration device, in particular a
Haushaltskältegerät, mit wenigstens einer Lagerkammer, einer Verdunstungsschale zum Verdunsten von aus der Lagerkammer abgeleitetem Tauwasser, einem in thermischem Kontakt mit der Verdunstungsschale angeordneten Verdichtermotor und einer Domestic refrigerating appliance, with at least one storage chamber, an evaporation tray for the evaporation of condensate discharged from the storage chamber, a compressor motor arranged in thermal contact with the evaporation tray, and a
Steuereinheit zum Versorgen des Verdichtermotors mit Strom die Steuereinheit zwischen einem Antriebsmodus, in dem sie einen zum Antreiben einer Drehung des A control unit for supplying the compressor motor with power, the control unit between a drive mode in which one for driving a rotation of the
Verdichtermotors geeigneten Strom liefert, und einem Heizbetriebsmodus umschaltbar ist, in dem sie einen zum Antreiben der Drehung ungeeigneten Strom liefert, d.h. einen Strom, der zwar durch den Verdichtermotor fließt und dort joulesche Wärme freisetzt, dabei aber keine Drehung antreibt. Compressor motor provides suitable current, and a Heizbetriebsmodus is switchable, in which it provides an unsuitable for driving the rotation current, i. a current that flows though the compressor motor and there releases Joule heat, but does not drive rotation.
Im einfachsten Fall kann ein solcher zum Antreiben einer Drehung ungeeigneter Strom ein Gleichstrom sein, mit dem eine einzelne Wicklung des Verdichtermotors beaufschlagt wird. In the simplest case, such an unsuitable current for driving a rotation may be a direct current to which a single winding of the compressor motor is applied.
Bevorzugt sind allerdings Ausgestaltungen, bei denen sich die thermische Belastung auf verschiedene Wicklungen des Verdichtermotors verteilt. Eine solche Verteilung ist insbesondere dann auf einfache Weise realisierbar, wenn die Steuereinheit einen Umrichter umfasst. However, embodiments are preferred in which the thermal load is distributed to different windings of the compressor motor. Such a distribution can be realized in a simple manner, in particular, if the control unit comprises an inverter.
Der Verdichtermotor kann in an sich üblicher Weise wenigstens drei Anschlussklemmen aufweisen, die verschiedene Wicklungen des Verdichtermotors versorgen und in einer ersten Reihenfolge zu bestromen sind, um eine Drehung des Verdichtermotors in einer Arbeitsrichtung anzutreiben. Die Steuerschaltung kann dann eingerichtet sein, im The compressor motor may comprise, in a conventional manner, at least three terminals which supply different windings of the compressor motor and are to be energized in a first order in order to drive a rotation of the compressor motor in a working direction. The control circuit can then be set up in the
Heizbetriebsmodus die Anschlussklemmen in einer von der ersten Reihenfolge abweichenden zweiten Reihenfolge zu bestromen. Herkömmlicherweise sind die Wicklungen des Verdichtermotors so mit den Heating mode to energize the terminals in a different order from the first order. Conventionally, the windings of the compressor motor are so with the
Anschlussklemmen verbunden, dass sie beim Bestromen der Anschlussklemmen in der ersten Reihenfolge ein mit einem ersten Drehsinn rotierendes Magnetfeld erzeugen, und der Anker des Motors kommt ins Rotieren, indem er sich in dem rotierenden Feld auszurichten versucht. Die zweite Reihenfolge kann dann zweckmäßigerweise so gewählt sein, dass ein mit wechselndem Drehsinn rotierendes Magnetfeld oder ein oszillierendes Magnetfeld erzeugt wird. Zwar versucht der Anker auch in einem solchen Magnetfeld, sich auszurichten, doch verhindert hier der ständige Wechsel der Feldrichtung, dass der Anker beschleunigt wird und eine Drehung in Gang kommt. Die Steuereinheit sollte zweckmäßigerweise eingerichtet sein, den Wärmebedarf der Terminals are connected to generate a magnetic field with a first rotational direction rotating when energizing the terminals in the first order, and the armature of the motor starts to rotate by trying to align itself in the rotating field. The second order may then be suitably chosen such that a magnetic field rotating with an alternating sense of rotation or an oscillating magnetic field is generated. Although the armature tries to align itself in such a magnetic field, here the constant change of the field direction prevents the armature from being accelerated and a rotation starting up. The control unit should be set up appropriately, the heat demand of
Verdunstungsschale abzuschätzen und anhand des geschätzten Wärmebedarfs zwischen Antriebsbetriebsmodus und Heizbetriebsmodus zu wählen. Estimate Evaporative Tray and choose between drive operating mode and heating mode based on the estimated heat demand.
Um den Wärmebedarf abzuschätzen kann die Steuereinheit mit einem an der To estimate the heat demand, the control unit with a at the
Verdunstungsschale angeordneten Wasserstandssensor verbunden sein. Evaporating shell arranged water level sensor to be connected.
Es kommen aber auch indirekte Methoden zur Bestimmung des Wärmebedarfs in But there are also indirect methods for determining the heat demand in
Betracht, wie etwa mit Hilfe eines in der Lagerkammer angeordneten Consider, such as with the help of a arranged in the storage chamber
Feuchtigkeitssensors. Mit Hilfe der Messwerte eines solchen Sensors kann die in der Luft der Lagerkammer enthaltene Feuchtigkeitsmenge abgeschätzt werden, die in näherer Zukunft als Kondenswasser in die Verdunstungsschale gelangen wird. Zweckmäßigerweise kann die Steuereinheit auch noch mit einem Türöffnungssensor verbunden sein, um abzuschätzen, wann und in welchem Umfang frische und feuchte Umgebungsluft in die Lagerkammer gelangt. Humidity sensor. With the aid of the measured values of such a sensor, the amount of moisture contained in the air of the storage chamber can be estimated, which in the near future will reach the evaporation tray as condensate. Conveniently, the control unit can also be connected to a door opening sensor to estimate when and to what extent fresh and moist ambient air enters the storage chamber.
Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren. Aus dieser Beschreibung und den Figuren gehen auch Merkmale der Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures. From this description and the figures are also features of the
Ausführungsbeispiele hervor, die nicht in den Ansprüchen erwähnt sind. Solche Merkmale können auch in anderen als den hier spezifisch offenbarten Kombinationen auftreten. Die Tatsache, dass mehrere solche Merkmale in einem gleichen Satz oder in einer anderen Art von Textzusammenhang miteinander erwähnt sind, rechtfertigt daher nicht den Schluss, dass sie nur in der spezifisch offenbarten Kombination auftreten können; Embodiments, which are not mentioned in the claims. Such features may also occur in combinations other than those specifically disclosed herein. Therefore, the fact that several such features are mentioned in the same sentence or in a different type of textual context does not justify the conclusion that they can occur only in the specific combination disclosed;
stattdessen ist grundsätzlich davon auszugehen, dass von mehreren solchen Merkmalen auch einzelne weggelassen oder abgewandelt werden können, sofern dies die instead, it must be assumed that, of several such characteristics, it is also possible to omit or modify individual ones, provided that this is the case
Funktionsfähigkeit der Erfindung nicht in Frage stellt. Es zeigen: Functionality of the invention is not in question. Show it:
Fig. 1 einen schematischen Schnitt durch ein Haushaltskältegerät, an dem die vorliegende Erfindung anwendbar ist; Fig. 1 is a schematic section through a household refrigerator, to which the present invention is applicable;
Fig. 2 ein schematisches Schaltbild eines in dem Kältegerät der Fig. 1 verwendeten Umrichters; und FIG. 2 is a schematic circuit diagram of an inverter used in the refrigerator of FIG. 1; FIG. and
Fig. 3 den zeitlichen Ablauf der von dem Umrichter im Fig. 3 shows the timing of the inverter in the
Antriebsbetriebsmodus zyklisch wiederkehrend an den  Drive operating mode cyclically recurring to the
Verdichtermotor des Kältegeräts angelegten Schaltzustände.  Compressor motor of the refrigerator applied switching states.
Das in Fig. 1 gezeigte Haushaltskältegerät, hier ein Kühlschrank hat in fachüblicher Weise ein wärmeisolierendes Gehäuse mit einem Korpus 1 und eine außerhalb der Schnittebene der Figur liegende Tür, die zusammen mit dem Korpus 1 eine Lagerkammer 3 begrenzt. Die Lagerkammer 3 ist hier durch einen an ihrer Rückwand 2 zwischen einem The household refrigerating appliance shown in Fig. 1, here a refrigerator has in a usual way a heat-insulating housing with a body 1 and a lying outside the cutting plane of the figure door, which limits a storage chamber 3 together with the body 1. The storage chamber 3 is here by a on its rear wall 2 between a
Innenbehälter des Korpus 1 und einer diesen umgebenden isolierenden Inner container of the body 1 and an insulating surrounding it
Schaumstoffschicht angeordneten Coldwall-Verdampfer 4 gekühlt, doch dürfte für den Fachmann unmittelbar einsichtig sein, dass die im Folgenden erläuterten Besonderheiten der Erfindung auch in Verbindung mit beliebigen anderen Typen von Verdampfern, insbesondere einem Nofrost-Verdampfer, anwendbar sind. Denkbar ist auch die Foam layer arranged Coldwall evaporator 4 cooled, but it should be immediately obvious to the skilled person that the features of the invention explained below also in conjunction with any other types of evaporators, in particular a Nofrost evaporator, are applicable. It is also conceivable
Anwendung auf ein Nofrost-Gefriergerät, da dieses, zumindest in einer Abtauphase seines Verdampfers, ebenfalls Tauwasser abgibt. Application to a Nofrost freezer, as this, at least in a defrosting phase of its evaporator, also releases condensation.
Beim hier betrachteten Coldwall-Kältegerät erstreckt sich am Fuße der durch den In the case of the Coldwall refrigeration device considered here, the base extends through the
Verdampfer 4 gekühlten Rückwand der Lagerkammer 3 eine Auffangrinne 7, die Evaporator 4 cooled rear wall of the storage chamber 3 a collecting channel 7, the
Tauwasser, das sich an dem vom Verdampfer 4 gekühlten Bereich des Innenbehälters niederschlägt und daran abwärts fließt, auffängt. Eine Rohrleitung 8 führt vom tiefsten Punkt der Auffangrinne 7 durch die isolierende Schaumstoffschicht hindurch zu einer Verdunstungsschale 9, die in einem Maschinenraum 5 auf einem Gehäuse eines  Condensation water, which precipitates at the area of the inner container cooled by the evaporator 4 and flows downwards, traps. A pipeline 8 leads from the lowest point of the gutter 7 through the insulating foam layer through to an evaporation tray 9, which in a machine room 5 on a housing of a
Verdichters 6 montiert ist, um durch Abwärme des Verdichters, insbesondere seines Antriebsmotors, beheizt zu werden. Compressor 6 is mounted to be heated by waste heat of the compressor, in particular its drive motor.
Bei einem Nofrost-Kältegerät könnte eine entsprechende Rohrleitung vom Boden einer den Verdampfer aufnehmenden Kammer ausgehen. In a Nofrost refrigeration appliance, a corresponding pipeline could emanate from the bottom of a chamber receiving the evaporator.
Der Verdichter 6 ist in fachüblicher und deshalb hier nicht eigens in einer Figur The compressor 6 is common in the art and therefore not specifically in a figure
dargestellter Weise Teil eines Kältemittelkreises, in dem an einen Druckanschluss des Verdichters 6 hintereinander ein z.B. außen an der Rückwand 2 montierter Verflüssiger, eine Drossel und der Verdampfer 4 angeschlossen sind. Ein Ausgang des Verdampfers 4 ist wiederum mit einem Sauganschluss des Verdichters 6 verbunden. part of a refrigerant circuit in which a pressure connection of the compressor 6 in a row, one e.g. Condenser mounted outside on the rear wall 2, a throttle and the evaporator 4 are connected. An outlet of the evaporator 4 is in turn connected to a suction port of the compressor 6.
Eine elektronische Steuereinheit 10 umfasst einen Mikroprozessor oder Mikrocontroller, der mit einem an der Lagerkammer 3 angeordneten Temperatursensor 1 1 verbunden ist, um den Betrieb des Verdichters 6 anhand der Temperatur der Lagerkammer 3 zu steuern. Die Steuereinheit 10 ist außerdem eingerichtet, um die Wärmemenge abzuschätzen, die die Verdunstungsschale 9 benötigt, um das ihr zufließende Tauwasser schnell genug zu verdampfen, damit die Verdunstungsschale 9 nicht überläuft. Im einfachsten Fall kann hierfür ein Wasserstandssensor 12, z.B. ein Schwimmerschalter, in der An electronic control unit 10 comprises a microprocessor or microcontroller which is connected to a temperature sensor 11 arranged on the storage chamber 3 in order to control the operation of the compressor 6 on the basis of the temperature of the storage chamber 3. The control unit 10 is also adapted to estimate the amount of heat needed by the evaporation tray 9 to evaporate the condensation water flowing in it fast enough so that the evaporation tray 9 does not overflow. In the simplest case, a water level sensor 12, e.g. a float switch in the
Verdunstungsschale 9 angeordnet sein, und die Steuereinheit 10 erkennt einen Evaporation tray 9 may be arranged, and the control unit 10 detects a
Wärmebedarf der Verdunstungsschale 9, wenn der Wasserstandssensor 12 das Wasser in der Schale 9 berührt, bzw. keinen Wärmebedarf, wenn der Wasserspiegel unterhalb des Wasserstandssensors 12 liegt. Zahlreiche andere Ansätze zur Beurteilung des Wärmebedarfs sind denkbar, auch solche, die keine unmittelbare Messung des Wasserstandes in der Verdunstungsschale 9 fordern. So kann z.B. am Boden der Verdunstungsschale 9 ein Temperatursensor vorgesehen sein, der eine aus dem Betrieb des Verdichters 6 resultierende Erwärmung erfasst. Aus der Geschwindigkeit der Erwärmung kann auf die Menge des Wassers in der Heat requirement of the evaporation tray 9 when the water level sensor 12 touches the water in the shell 9, or no heat demand when the water level is below the water level sensor 12. Numerous other approaches for assessing the heat demand are conceivable, even those that do not require immediate measurement of the water level in the evaporation tray 9. For example, at the bottom of the evaporation tray 9, a temperature sensor may be provided which detects a heating resulting from the operation of the compressor 6. From the rate of warming can affect the amount of water in the
Verdunstungsschale 9 geschlossen werden. Evaporation tray 9 are closed.
Andere alternative Ansätze zur Beurteilung des Wärmebedarfs können z.B. auf der Abschätzung des Feuchtigkeitseintrags in die Lagerkammer 3 basieren, etwa indem, etwa mittels eines von der Tür betätigten Schalters, die Zahl und eventuell die Dauer von Türöffnungen erfasst und daraus die in die Lagerkammer 3 eingedrungene Menge an Luftfeuchtigkeit abgeschätzt wird, die im Laufe der Zeit die Verdunstungsschale 9 erreichen wird. Ergänzend kann hierfür noch ein Luftfeuchtigkeitssensor an der Other alternative approaches to assessing heat demand may be e.g. are based on the estimation of the moisture input into the storage chamber 3, such as by, for example by means of a door-operated switch, the number and possibly the duration of door openings detected and from this the amount entered into the storage chamber 3 amount of humidity is estimated in the course of Time will reach the evaporation tray 9. In addition, this can be a humidity sensor on the
Lagerkammer 3 vorgesehen sein. Mittels eines am Verdampfer 4 angeordneten Temperatursensors kann die Storage chamber 3 may be provided. By means of a temperature sensor arranged on the evaporator 4, the
Geschwindigkeit gemessen werden, mit der sich beim Einschalten des Verdichters 6 der Verdampfer 4 abkühlt, und daraus kann die Steuereinheit 10 auf die Rate rückschließen, mit der sich Feuchtigkeit am Verdampfer 4 niederschlägt, die später in der  Speed can be measured, with which cools when turning on the compressor 6, the evaporator 4, and from this, the control unit 10 can infer the rate at which precipitates moisture on the evaporator 4, which later in the
Verdunstungsschale 9 landen wird. Evaporative shell 9 will land.
Im Falle eines Gefriergeräts erlaubt auch die Erfassung der beim Abtauen eingesetzten Menge an Wärmeenergie eine Abschätzung der dadurch aufgetauten und in die In the case of a freezer also allows the detection of the amount of heat energy used in defrosting an estimated thawed by this and in the
Verdunstungsschale 9 fließenden Wassermenge. Eine solche Erfassung kann Evaporation tray 9 flowing amount of water. Such a capture can
insbesondere auf einer Messung der Dauer des Abtauvorgangs basieren. in particular based on a measurement of the duration of the defrosting process.
Fig. 2 zeigt ein Blockschaltbild der Steuereinheit 10 und des von ihr angesteuerten Motors 13 des Verdichters 6. Ein Mikroprozessor 14 steuert sechs Schalter SU 1 , SV1 , SW1 , SU2, SV2, SW2 eines Umrichters 15, von denen jeweils die Schalter SU1 , SV1 , SW1 zwischen einem positiven Versorgungspotential (+) und einer Anschlussklemme oder Phase U, V bzw. W des Motors 13 angeordnet sind, und die Schalter SU2, SV2, SW2 jeweils zwischen einer dieser drei Anschlussklemmen oder Phasen und einem negativen Versorgungspotential (-) angeordnet sind. Bei den Schaltern kann es sich in an sich bekannter Weise um IGBTs mit einer parallel geschalteten Freilaufdiode oder MOSFETs handeln. Der Mikroprozessor 14 kann mit dem oben erwähnten, mit den Sensoren 1 1 , 12 verbundenen Mikroprozessor identisch sein, oder es kann sich um einen zweiten, nur für die Sequenzsteuerung des Motors 13 zuständigen Mikroprozessor handeln. In letzterem Falle werden die beiden Mikroprozessoren meist örtlich voneinander getrennt montiert sein, einer in der Nähe einer Benutzerschnittstelle, deren Eingaben er verarbeitet, der andere 14 benachbart zum von ihm gesteuerten Motor 13. FIG. 2 shows a block diagram of the control unit 10 and the motor 13 of the compressor 6 which it controls. A microprocessor 14 controls six switches SU 1, SV 1, SW 1, SU 2, SV 2, SW 2 of an inverter 15, of which the switches SU 1, SV 1 , SW1 are arranged between a positive supply potential (+) and a terminal or phase U, V or W of the motor 13, and the switches SU2, SV2, SW2 each between one of these three terminals or phases and a negative supply potential (-) arranged are. The switches may, in a manner known per se, be IGBTs with a freewheeling diode or MOSFETs connected in parallel. The microprocessor 14 can with the above-mentioned, with the sensors 1 1, 12th be connected microprocessor identical, or it may be a second, responsible only for the sequence control of the motor 13 microprocessor. In the latter case, the two microprocessors will usually be mounted separately from each other, one in the vicinity of a user interface whose inputs it processes, the other 14 adjacent to the motor 13 controlled by it.
Drei Ständerwicklungen 16 des Motors 13 sind hier in einer Sternschaltung zwischen den Phasen U, V, W angeordnet. Für den Fachmann dürfte auf der Hand liegen, dass eine Dreiecksschaltung ebenfalls in Betracht kommt, bzw. dass die Zahl der Phasen und Wicklungen auch größer als drei sein kann. Three stator windings 16 of the motor 13 are arranged here in a star connection between the phases U, V, W. It will be obvious to a person skilled in the art that a triangular circuit is also suitable, or that the number of phases and windings can also be greater than three.
Im Antriebsbetriebsmodus erzeugt der Mikroprozessor 14 im Laufe der Zeit t zyklisch wiederkehrend verschiedene Schaltzustände, hier sechs Stück, die in Fig. 3 mit a, b, f bezeichnet sind. Fig. 3 zeigt für jeden der Schaltzustände a bis f den Zustand der Schalter des Umrichters 15 sowie die daraus resultierenden Spannungen an den Anschlussklemmen U, V, W des Motors 13. Im Zustand a sind die Schalter SU1 , SW1 geschlossen. Die Schalter SU2, SW2, SV1 sind offen und der Schalter SV2 wird gepulst geöffnet und geschlossen. In the drive mode of operation, the microprocessor 14 periodically generates various switching states over time t, here six, designated by a, b, f in FIG. FIG. 3 shows, for each of the switching states a to f, the state of the switches of the converter 15 and the resulting voltages at the connection terminals U, V, W of the motor 13. In the state a, the switches SU1, SW1 are closed. The switches SU2, SW2, SV1 are open and the switch SV2 is pulsed open and closed.
Entsprechend dem Tastverhältnis des Schalters SV2 fließt Strom durch die According to the duty cycle of the switch SV2 current flows through the
Anschlussklemmen U, V bzw. V, W des Motors 13, und die resultierenden Magnetfelder der Ständerwicklungen 16 überlagern sich zu einem Raumzeiger ua. Im nachfolgenden Schaltzustand b sind die Schalter SV2, SW2 offen, SU2, SV1 , SW1 sind geschlossen und SU1 ist pulsbreitenmoduliert; entsprechend fließt Strom durch die Anschlussklemmen U; V und U, W, und es resultiert ein Raumzeiger u , der gegenüber ua um 60° im Terminals U, V and V, W of the motor 13, and the resulting magnetic fields of the stator windings 16 are superimposed to a space vector u a . In the following switching state b, the switches SV2, SW2 are open, SU2, SV1, SW1 are closed and SU1 is pulse-width-modulated; accordingly, current flows through the terminals U; V and U, W, resulting in a space vector u, which is opposite to u a by 60 ° in
Gegenuhrzeigersinn gedreht ist. Die Zustände geschlossen, offen, pulsbreitenmoduliert der Schalter für die Zustände c, d, e, f, sowie die daraus resultierenden Stromverteilungen in den Ständerwicklungen 16 und Raumzeiger können aus Fig. 3 abgelesen werden und brauchen hier nicht im Detail erläutert zu werden. Wesentlich ist, dass die Counterclockwise is turned. The states closed, open, pulse width modulated the switch for the states c, d, e, f, as well as the resulting current distributions in the stator windings 16 and room pointer can be read from Fig. 3 and need not be explained in detail here. It is essential that the
Aufeinanderfolge der Zustände a, b, f, a eine kontinuierliche Raumzeigerdrehung von 360° ergibt. Sequence of states a, b, f, a results in a continuous space-hand rotation of 360 °.
Um den Anker des Motors 13 wirksam anzutreiben, muss die Frequenz, mit der die Zustände a bis f aufeinander folgen, an die Drehfrequenz des Ankers angepasst sein. Sie kann z.B. gesteuert sein mit Hilfe eines Hallsensors 17, der am Motor 13 angeordnet und dem Feld von dessen rotierendem Anker ausgesetzt ist, oder einer sensorlosen In order to effectively drive the armature of the motor 13, the frequency with which the states a to f follow each other must be adapted to the rotational frequency of the armature. It may for example be controlled by means of a Hall sensor 17, which is arranged on the motor 13 and is exposed to the field of its rotating armature, or a sensorless
Lageerkennung. Situational awareness.
Es gibt verschiedene Möglichkeiten, wie die Steuereinheit 10 die Anschlussklemmen U, V, W des Motors 13 im Heizbetriebsmodus bestromen kann. Eine Möglichkeit ist z.B., einen der Schaltzustände a bis f über die gesamte Dauer des Heizbetriebsmodus There are various ways in which the control unit 10 can energize the connection terminals U, V, W of the motor 13 in the heating operating mode. One possibility is, for example, one of the switching states a to f over the entire duration of the heating operating mode
beizubehalten. Wie man leicht sieht, ist z.B. im Zustand a die Stromstärke auf der maintain. As one easily sees, e.g. in the state a the amperage on the
Klemme V doppelt so hoch wie an den Klemmen U, W, und dementsprechend ist auch die Wärmeentwicklung ungleichmäßig auf die Ständerwicklungen 16 verteilt. Daher muss in diesem Falle das Tastverhältnis so begrenzt sein, dass eine Überhitzung auch der am stärksten beanspruchten Ständerwicklung 16 ausgeschlossen ist. Terminal V twice as high as at the terminals U, W, and accordingly, the heat development is distributed unevenly on the stator windings 16. Therefore, in this case, the duty cycle must be limited so that overheating of the most stressed stator winding 16 is excluded.
Eine zweite Möglichkeit ist, die Anschlussklemmen U, V, W so zu bestromen, dass anstelle eines rotierenden Raumzeigers ein oszillierender Raumzeiger erhalten wird. Dies ist z.B. möglich durch periodisches Umschalten zwischen den Zuständen a und d. Wenn die Umschaltfrequenz zwischen den zwei Zuständen hoch ist, dann genügt die Dauer z.B. des Zustands a nicht, um den Rotor in eine den Raumzeiger ua entsprechende stabile Gleichgewichtsstellung zu bringen, und eine eventuell begonnene Drehung des Rotors wird in Zustand d sofort wieder abgebremst, so dass der Rotor allenfalls geringfügig zittert, aber keine Drehung in Gang kommt. Ist die Umschaltfrequenz so niedrig, dass im Zustand a eine stabile Gleichgewichtsstellung erreicht wird, dann entspricht diese imA second possibility is to energize the connection terminals U, V, W so that an oscillating space vector is obtained instead of a rotating space vector. This is possible, for example, by periodically switching between the states a and d. If the switching frequency between the two states is high, then the duration of, for example, the state a is not sufficient to bring the rotor into a stable equilibrium position corresponding to the space vector u a , and any rotation of the rotor that has already begun is immediately decelerated again in state d, so that the rotor trembles at most slightly, but no rotation gets going. If the switching frequency is so low that a stable equilibrium position is reached in state a, then this corresponds to
Zustand d einem labilen Gleichgewicht, so dass wiederum keine Drehung in Gang kommt. Condition d an unstable balance, so that again no rotation gets going.
Die Verteilung der Heizleistung auf die Ständerwicklungen 16 ist bei dieser Ausgestaltung dieselbe wie in dem zuerst betrachteten Fall, in dem der Schaltzustand a während des gesamten Heizbetriebs beibehalten wird. Da der Anker nicht in Drehung versetzt wird, besteht hier jedoch die Möglichkeit, gelegentlich vom Zustandspaar a, d auf ein anderes Paar wie etwa b, e oder c, f umzuschalten, um so die Heizleistung gleichmäßiger auf die Wicklungen zu verteilen. Einer dritten Ausgestaltung zufolge wechseln sich im Heizbetriebsmodus drei auch imThe distribution of the heating power to the stator windings 16 in this embodiment is the same as in the first considered case in which the switching state a is maintained throughout the heating operation. However, since the armature is not rotated, it is possible here and there to occasionally switch from pair of states a, d to another pair such as b, e or c, f so as to distribute the heating power more uniformly to the windings. According to a third embodiment, three also change in the heating mode
Arbeitsbetriebsmodus aufeinanderfolgende Schaltzustände zyklisch ab, z.B. die Zustände a, b, c. Wie man anhand von Fig. 3 leicht nachvollziehen kann, führt in jedem dieser drei Zustände eine andere der drei Anschlussklemmen U, V, W die doppelte Stromstärke, so dass die Heizleistung sich gleichmäßig auf alle Ständerwicklungen 16 verteilt. Der Raumzeiger führt, wenn die Zustände a, b, c aufeinanderfolgen zwar eine Drehung um 120° aus, doch wenn auf den Zustand c wieder a folgt, resultiert daraus wiederum ein abbremsendes Drehmoment auf den Anker, so dass keine Drehung in Gang kommt. Der Motor 13 erzeugt somit ausschließlich Wärme, ohne mechanische Arbeit zu leisten. Daher kann das Wasser in der Verdunstungsschale 9 zügig verdampft werden, auch und vor allem dann, wenn die Lagerkammer 3 keinen Kältebedarf hat. Arbeitsbetriebsmodus successive switching states cyclically, for example, the states a, b, c. As can easily be understood from FIG. 3, in each of these three states, another one of the three terminals U, V, W has twice the current, so that the heating power is evenly distributed to all the stator windings 16. Of the Space pointer performs, if the states a, b, c successive turn by 120 °, but when the state c again followed by a, this in turn results in a decelerating torque on the armature, so that no rotation is initiated. The motor 13 thus generates heat only without performing mechanical work. Therefore, the water in the evaporation tray 9 can be evaporated quickly, even and especially when the storage chamber 3 has no refrigeration demand.
Es liegt auf der Hand, dass es je nach Bauart des Elektromotors 13 unterschiedliche Wege geben kann, um seine Wicklungen so zu bestromen, dass zwar Wärme erzeugt wird, im zeitlichen Mittel aber kein Drehmoment auf den Anker wirkt. So ist es bei einem Motor mit einer geraden Zahl von Wicklungen die Wicklungen im Allgemeinen paarweise parallel ausgerichtet. Wenn die zwei Wicklungen eines solchen Paars gegensinnig bestromt werden, heben sich ihre Magnetfelder gegenseitig auf und treiben keine It is obvious that there may be 13 different ways depending on the design of the electric motor to energize its windings so that, although heat is generated in time but no torque acts on the anchor. Thus, in a motor with an even number of windings, the windings are generally aligned in pairs in parallel. If the two windings of such a pair are energized in opposite directions, their magnetic fields cancel each other and drive none
Drehung an. Um eine hohe Heizleistung zu erzielen, können mehrere Paare gleichzeitig bestromt werden. Turn on. To achieve a high heat output, several pairs can be energized simultaneously.
BEZUGSZEICHEN REFERENCE NUMBERS
Korpus corpus
Rückwand  rear wall
Lagerkammer  storage chamber
Verdampfer  Evaporator
Maschinenraum  engine room
Verdichter  compressor
Auffangrinne  collecting channel
Rohrleitung  pipeline
Verdunstungsschale  evaporation tray
Steuereinheit  control unit
Temperatursensor  temperature sensor
Wasserstandssensor  Water level sensor
Motor  engine
Mikroprozessor  microprocessor
Umrichter  inverter
Statorwicklung  stator
Hallsensor  Hall sensor

Claims

PATENTANSPRÜCHE
1. Kältegerät, insbesondere Haushaltskältegerät, mit wenigstens einer Lagerkammer (3), einer Verdunstungsschale (9) zum Verdunsten von aus der Lagerkammer (3) abgeleitetem Tauwasser, einem in thermischem Kontakt mit der 1. Refrigerating appliance, in particular domestic refrigeration appliance, with at least one storage chamber (3), an evaporation tray (9) for evaporating from the storage chamber (3) derived condensate, one in thermal contact with the
Verdunstungsschale (9) angeordneten Verdichtermotor (13) und einer  Evaporating tray (9) arranged compressor motor (13) and a
Steuereinheit (10) zum Versorgen des Verdichtermotors (13) mit Strom, dadurch gekennzeichnet, dass die Steuereinheit (10) zwischen einem  Control unit (10) for supplying the compressor motor (13) with power, characterized in that the control unit (10) between a
Antriebsbetriebsmodus, in dem sie einem zum Antreiben einer Drehung des Verdichtermotors (13) geeigneten Strom liefert, und einem Heizbetriebsmodus umschaltbar ist, in dem sie einen zum Antreiben der Drehung ungeeigneten Strom liefert.  A driving operation mode in which it supplies a current suitable for driving rotation of the compressor motor (13), and a heating operation mode in which it supplies a current unsuitable for driving the rotation.
2. Kältegerät nach Anspruch 1 , dadurch gekennzeichnet, dass die Steuereinheit (10) einen Umrichter (15) umfasst. 2. Refrigerating appliance according to claim 1, characterized in that the control unit (10) comprises an inverter (15).
3. Kältegerät nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der 3. Refrigerating appliance according to claim 1 or 2, characterized in that the
Verdichtermotor (13) wenigstens drei Anschlussklemmen (U, V, W) aufweist, die in einer ersten Reihenfolge zu bestromen sind, um eine Drehung des  Compressor motor (13) has at least three terminals (U, V, W) to be energized in a first order to a rotation of the
Verdichtermotors (13) in einer Arbeitsrichtung anzutreiben, und dass die  To drive the compressor motor (13) in one direction, and that the
Steuereinheit (10) eingerichtet ist, im Heizbetriebsmodus die Anschlussklemmen (U, V, W) in einer von der ersten Reihenfolge abweichenden zweiten Reihenfolge zu bestromen.  Control unit (10) is arranged to energize the connection terminals (U, V, W) in a second sequence that deviates from the first order in the heating operating mode.
4. Kältegerät nach Anspruch 3, dadurch gekennzeichnet, dass Wicklungen (16) des Verdichtermotors (13) so mit den Anschlussklemmen (U, V, W) verbunden sind, dass sie beim Bestromen der Anschlussklemmen (U, V, W) in der ersten 4. Refrigerating appliance according to claim 3, characterized in that windings (16) of the compressor motor (13) are so connected to the terminals (U, V, W) that when energizing the terminals (U, V, W) in the first
Reihenfolge ein mit einem ersten Drehsinn rotierendes Magnetfeld erzeugen, und dass die zweite Reihenfolge so gewählt ist, dass ein mit wechselndem Drehsinn rotierendes Magnetfeld oder ein oszillierendes Magnetfeld erzeugt wird.  Sequence generate a rotating with a first direction of rotation magnetic field, and that the second order is chosen so that a rotating magnetic field with alternating sense or an oscillating magnetic field is generated.
5. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Steuereinheit (10) eingerichtet ist, den Wärmebedarf der Verdunstungsschale (9) abzuschätzen und anhand des geschätzten 5. Refrigerating appliance according to one of the preceding claims, characterized in that the control unit (10) is arranged, the heat demand of Evaporation bowl (9) and estimate the estimated
Wärmebedarfs zwischen Antriebsbetriebsmodus und Heizbetriebsmodus zu wählen.  Heat demand between drive mode and heating mode.
6. Kältegerät nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Steuereinheit (10) mit einem an der Verdunstungsschale (9) 6. Refrigerating appliance according to one of the preceding claims, characterized in that the control unit (10) with a on the evaporation tray (9)
angeordneten Wasserstandssensor (12) verbunden ist.  arranged water level sensor (12) is connected.
EP13737271.0A 2012-07-31 2013-07-17 Refrigerator having an evaporation tray Active EP2880385B1 (en)

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Also Published As

Publication number Publication date
EP2880385B1 (en) 2018-08-15
WO2014019850A1 (en) 2014-02-06
DE102012213468A1 (en) 2014-02-06
CN104508409B (en) 2016-09-07
CN104508409A (en) 2015-04-08

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