EP1974088A1 - Domestic appliance for the care of washed articles - Google Patents

Domestic appliance for the care of washed articles

Info

Publication number
EP1974088A1
EP1974088A1 EP06830405A EP06830405A EP1974088A1 EP 1974088 A1 EP1974088 A1 EP 1974088A1 EP 06830405 A EP06830405 A EP 06830405A EP 06830405 A EP06830405 A EP 06830405A EP 1974088 A1 EP1974088 A1 EP 1974088A1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
process air
domestic appliance
additional heat
appliance according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06830405A
Other languages
German (de)
French (fr)
Other versions
EP1974088B1 (en
Inventor
Klaus Grunert
Kai Nitschmann
Günter Steffens
Andreas Stolze
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 Bosch und Siemens 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 Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Priority to PL06830405T priority Critical patent/PL1974088T3/en
Publication of EP1974088A1 publication Critical patent/EP1974088A1/en
Application granted granted Critical
Publication of EP1974088B1 publication Critical patent/EP1974088B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/22—Lint collecting arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a household appliance for the care of laundry items, which has a container for receiving laundry items.
  • the container is arranged in a process air supply of the domestic appliance, wherein process air flowing through the process air guide also flows through the container.
  • the domestic appliance comprises a first heat exchanger which is coupled to the process air guide and is designed for dehumidifying the process air emerging from the container.
  • process air ducting encompasses both a closed process air circulation system and an open process air ducting.
  • domestic appliance for the care of laundry items encompasses any such apparatus that is set up for drying laundry, wherein both an exhaust air dryer in which the Process air is passed in an open process air duct after contact with the laundry to the outside, as well as a circulating air dryer, in which the process air is guided in a closed process air cycle, are included.
  • the process air guide should in particular include all air ducts and components through which process air flows during operation.
  • EP 1 055 767 B1 discloses a domestic appliance designed as a household laundry dryer. This has a fan to produce within a guide a process air flow, which is brought in a drying room in contact with the laundry to be dried to absorb moisture. Also, the domestic appliance includes means for introducing and discharging a liquid into or out of a portion of the process air duct. Furthermore, the domestic appliance has a control which is designed such that in a cleaning phase when the fan is switched off, a section of the process air guide is separated by means of a closing device and flooded at least partially with a liquid for a certain period of time, which at the end of the cleaning phase flows out of the flooded Section of the process air duct is removed.
  • a heat exchanger may be arranged for condensing moisture contained in the process air, at which lint and impurities have settled, which are to be removed by the flooding.
  • a domestic appliance in the form of a tumble dryer is known, which is equipped with a compressor heat pump to reduce energy consumption.
  • a tumble dryer lint which dissipates the process air from the drying laundry, a particular problem is because the fine structures of the flowed through by the process air components, in particular the evaporator and the condenser, the heat pump particularly susceptible to clogging by fine lint, which can not be completely absorbed by a conventional lint filter are.
  • the household appliance according to the invention for the care of items of laundry has a container for receiving laundry items, in particular a drum, which in a
  • Process air duct is arranged.
  • the container is with the process air guide in such
  • the domestic appliance comprises a first heat exchanger which is coupled to the process air guide and designed for dehumidifying the process air emerging from the container.
  • a first heat exchanger which is coupled to the process air guide and designed for dehumidifying the process air emerging from the container.
  • An essential idea is that an additional heat exchanger for lint filtering is arranged in the process air duct. By this configuration is achieved in a reliable manner that fine lint can be filtered out in the process air flow through the additional heat exchanger and thus can no longer attach to the actual means for dehumidifying the exiting the container process air.
  • the additional heat exchanger cools the process air flowing through it slightly and causes condensation in the process air to a slight extent, but only as much as useful for binding fine lint, which entrains the process air and which in particular provided by a known, before the additional heat exchanger conventional lint filter can not be collected is required.
  • the additional heat exchanger is arranged in the direction of the process air flow in front of the means for dehumidifying the process air.
  • cooling elements of the working medium circuit of the domestic appliance are arranged adjacent to an outer side of the additional heat exchanger.
  • the additional heat exchanger is coupled directly to the working fluid circuit or arranged in this.
  • Such cooling elements do not penetrate this additional heat exchanger itself as a result of such external attachment or contact of the cooling elements with the additional heat exchanger.
  • the additional heat exchanger is arranged positively and / or non-positively on the cooling elements.
  • this enables effective cooling and, on the other hand, a mechanically stable connection.
  • the additional heat exchanger with a biasing device, which may be a spring element in particular, mechanically connected.
  • This biasing device is arranged and configured such that it presses the additional heat exchanger to the cooling elements.
  • a positionally stable arrangement of the additional heat exchanger in the process air duct is achieved and, moreover, good contact with the cooling elements is produced.
  • the additional heat exchanger can be removed in a low-cost manner and quickly from the household appliance and used again. A cleaning process is therefore possible with very little effort.
  • the positive connection always ensures sufficient contact after a replacement of the additional heat exchanger in the domestic appliance.
  • a lint filter is arranged in the direction of the process air flow upstream of the additional heat exchanger.
  • a relatively low cooling capacity suffices in order to achieve a low condensation of the moist process air from the drum filled with wet laundry between the exit from the drum and the entry into the first heat exchanger, but sufficient to catch the lint.
  • the additional heat exchanger is arranged and fastened such that it can be removed without the use of a tool from the domestic appliance. This allows uncomplicated removal and cleaning by an operator of the household appliance; an intervention of a specially trained and equipped with appropriate tool specialist in the context of a costly maintenance measure is no longer necessary.
  • the domestic appliance is designed as a tumble dryer.
  • the non-fixed obstruction of the additional heat exchanger Due to the non-fixed obstruction of the additional heat exchanger in the household appliance easy and uncomplicated removal of the additional heat exchanger from the domestic appliance and in particular from the working fluid circuit is possible. Nevertheless, in particular the positive and / or non-positive connection with the working fluid circuit allows a stable positioning.
  • the non-fixed obstruction of the additional heat exchanger has a significant advantage, since the additional heat exchanger must be rinsed at regular intervals by a liquid, especially water, and it is easy to remove and thus can be easily and easily cleaned.
  • Fig. 1 is a schematic representation of a tumble dryer
  • Fig. 2 is a sectional view of an additional heat exchanger of the tumble dryer.
  • FIG. 1 In a schematic block diagram representation in Fig. 1, the essential elements for present explanation of a domestic appliance 1 for the care of laundry items are shown.
  • the household appliance 1 for the care of items of laundry is designed as a tumble dryer 1.
  • the tumble dryer 1 is designed as a circulating air dryer and comprises a container 2 for receiving laundry items.
  • the container 2 is arranged in a process air duct 3, which is designed as a process air circuit 3 in the exemplary embodiment. In this case, the process air flowing in the process air circuit 3 also flows through the container 2.
  • the fed through the container 2 dry air or process air is before entering the drum or in the container 2 by a second heat exchanger 5, which serves as a condenser 5 for circulating in a working fluid circuit 4 working equipment, and as required by an additional not shown heater heated and after exiting the container 2 for condensation of moisture contained in the process air through a first heat exchanger 6, which serves as an evaporator 6 for circulating in the working fluid circuit 4 working means cooled.
  • the process air is driven by a blower 1 1 and flows in the direction of the arrows through the process air circuit 3. Within the container 2, the heated process air comes into contact with the laundry to be dried and absorbs moisture.
  • the working medium circuit 4 is thermally coupled to the process air circuit 3 via the condenser 5, the evaporator 6 and an additional heat exchanger 9 to be described below, which has the function of an additional evaporator 9.
  • the working fluid circuit 4 forms with the condenser 5, the evaporator 6, the additional heat exchanger 9 and a compressor 7 and a throttle 8, a heat pump 4, 5, 6, 7, 8, 9.
  • the condenser 5 is arranged downstream of the compressor 7 and thus arranged on the pressure side ,
  • the condenser 5 nach- and the evaporator 6 upstream throttle 8 in the working fluid circuit 4 causes a necessary for evaporation of the working fluid pressure gradient between the condenser 5 and the evaporator 6.
  • the additional heat exchanger 9 is arranged. It is designed for flow filtration and positioned in the direction of the process air flow upstream of the first heat exchanger 5 and the second heat exchanger 6.
  • FIG. 2 shows a sectional view showing the arrangement of the additional heat exchanger 9 in the process air circuit 3.
  • Cooling elements 13, 14, 15 and 16 are positioned on a first outer side 91 of the additional heat exchanger 9.
  • the first outer side 91 faces away from the flowing process air during operation.
  • the cooling elements 13 to 16 are parts of a laid as a meander and traversed by the working medium pipe section.
  • the additional heat exchanger is composed of a plurality of plates 90, which are stacked perpendicular to the plane of the drawing leaving gaps for the process air 3 flowing in the direction of the arrows.
  • Figure 2 shows such a plate 90.
  • the protruding on the plate 90 structures 93 form channels or guide means for the process air and enlarge the surfaces on which lint can accumulate.
  • the additional heat exchanger 9 is pressed against the cooling elements 13 to 16 by a spring element 12 bearing against the second outer side 92 opposite the first outer side 91 with the first outer side 91.
  • the spring element 12 is supported or fixed, for example, on an inner wall of a channel of the process air circuit 3 and generates a biasing force, which presses the additional heat exchanger 9 to the cooling elements 13 to 16.
  • the additional heat exchanger 9 is positively and non-positively connected to the cooling elements 13 to 16, whereby an effective thermal coupling is ensured.
  • the plates are made of aluminum or another good thermal conductive material.
  • the additional heat exchanger 9 is cooled by the working medium flowing through the cooling elements 13 to 16, so that it causes a small degree of condensation in the process air flowing past. Fine lint, which are bound by condensate thus formed at the additional heat exchanger 9, deposited on the plates 90 from.
  • the additional heat exchanger 9 is due to its just described design can be easily removed from the process air circuit 3 and thus can be easily cleaned to remove the deposited on the plates 90 fine lint.
  • the additional heat exchanger 9 thus prevents easy and reliable contamination of the following in the process air circuit 3 on him evaporator 6, which is structured relatively fine according to the prior art and thus relatively prone to contamination by fluff.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

The invention relates to a domestic appliance (1) for the care of washed articles, in particular a tumble drier (1). Said appliance comprises a container (2) for receiving the washed articles, a process air supply (3) that is connected to the container (2), allowing process air to flow through the container (2), and a first heat exchanger (6), which is coupled to the process air supply (3) and is designed to dehumidify the process air that exits the container (2). A supplementary heat exchanger (9), which acts as a fluff filter, is situated in the process air supply (3). The first heat exchanger (6) forms part of a heat pump (4, 5, 6, 7, 8, 9).

Description

Hausgerät zur Pflege von Wäschestücken Domestic appliance for the care of laundry items
Die Erfindung betrifft ein Hausgerät zur Pflege von Wäschestücken, welches einen Behälter zur Aufnahme von Wäschestücken aufweist. Der Behälter ist in einer Prozessluftfüh- rung des Hausgeräts angeordnet, wobei durch die Prozessluftführung strömende Prozessluft auch durch den Behälter strömt. Darüber hinaus umfasst das Hausgerät einen ersten Wärmetauscher, welcher mit der Prozessluftführung gekoppelt ist und zur Entfeuchtung der aus dem Behälter austretenden Prozessluft ausgebildet ist.The invention relates to a household appliance for the care of laundry items, which has a container for receiving laundry items. The container is arranged in a process air supply of the domestic appliance, wherein process air flowing through the process air guide also flows through the container. In addition, the domestic appliance comprises a first heat exchanger which is coupled to the process air guide and is designed for dehumidifying the process air emerging from the container.
Mit dem Begriff „Prozessluftführung" sind sowohl ein geschlossener Prozessluftkreislauf als auch eine offene Prozessluftführung umfasst. Mit dem Begriff „Hausgerät zur Pflege von Wäschestücken" ist jedes derartige Gerät umfasst, das zum Trocknen von Wäsche eingerichtet ist, wobei sowohl ein Ablufttrockner, bei dem die Prozessluft in einer offenen Prozessluftführung nach Berührung mit der Wäsche ins Freie geleitet wird, als auch ein Umlufttrockner, bei dem die Prozessluft in einem geschlossenen Prozessluftkreislauf geführt wird, umfasst sind. Die Prozessluftführung soll im Folgenden insbesondere alle Luftkanäle und Bauteile umfassen, durch die im Betrieb Prozessluft hindurchströmt.The term "process air ducting" encompasses both a closed process air circulation system and an open process air ducting.The term "domestic appliance for the care of laundry items" encompasses any such apparatus that is set up for drying laundry, wherein both an exhaust air dryer in which the Process air is passed in an open process air duct after contact with the laundry to the outside, as well as a circulating air dryer, in which the process air is guided in a closed process air cycle, are included. In the following, the process air guide should in particular include all air ducts and components through which process air flows during operation.
Aus der EP 1 055 767 B1 ist ein als Haushaltswäschetrockner ausgebildetes Hausgerät bekannt. Dieses weist ein Gebläse auf, um innerhalb einer Führung einen Prozessluftstrom zu erzeugen, der in einem Trockenraum in Berührung mit der zu trocknenden Wäsche zur Aufnahme von Feuchtigkeit gebracht wird. Auch umfasst das Hausgerät Einrichtungen zum Einleiten und zum Ableiten einer Flüssigkeit in einen oder aus einem Abschnitt der Prozessluftführung. Des Weiteren weist das Hausgerät eine Steuerung auf, die derart ausgebildet ist, dass in einer Reinigungsphase bei ausgeschaltetem Gebläse ein Abschnitt der Prozessluftführung mittels einer Verschließeinrichtung abgeteilt und zumindest teilweise für eine bestimmte Zeitdauer mit einer Flüssigkeit geflutet wird, die am Ende der Reinigungsphase aus dem gefluteten Abschnitt der Prozessluftführung entfernt wird. In dem zu flutenden Abschnitt kann ein Wärmetauscher zum Kondensieren von in der Prozessluft enthaltenen Feuchtigkeit angeordnet sein, an dem sich Flusen und Verunreinigungen abgesetzt haben, die durch das Fluten entfernt werden sollen. Aus der EP 0 467 188 B1 ist ein Hausgerät in Form eines Wäschetrockners bekannt, welches zur Reduzierung des Energieverbrauches mit einer Kompressor-Wärmepumpe ausgerüstet ist. In einem solchen Wäschetrockner stellen Flusen, die die Prozessluft von der trocknenden Wäschestücken abführt, ein besonderes Problem dar, da die feinen Strukturen der von der Prozessluft durchströmten Komponenten, insbesondere des Verdampfers und des Verflüssigers, der Wärmepumpe besonders anfällig für eine Verstopfung durch feine Flusen, die von einem herkömmlichen Flusenfilter nicht vollständig aufgefangen werden können, sind. Obwohl üblicherweise ein Flusenfilter vorgesehen ist, können im Betrieb durchaus noch kleine Partikel oder feine Flusen zu Komponenten der Wärmepumpe gelangen und sich dort absetzen. Zusätzlich zur laufenden Reinigung des Flusenfilters muss in der Praxis daher die Prozessluftführung in regelmäßigen Abständen gereinigt werden. Dies ist jedoch sehr aufwendig, da insbesondere die Wärmetauscher relativ fest in dem Hausgerät verbaut sind.EP 1 055 767 B1 discloses a domestic appliance designed as a household laundry dryer. This has a fan to produce within a guide a process air flow, which is brought in a drying room in contact with the laundry to be dried to absorb moisture. Also, the domestic appliance includes means for introducing and discharging a liquid into or out of a portion of the process air duct. Furthermore, the domestic appliance has a control which is designed such that in a cleaning phase when the fan is switched off, a section of the process air guide is separated by means of a closing device and flooded at least partially with a liquid for a certain period of time, which at the end of the cleaning phase flows out of the flooded Section of the process air duct is removed. In the section to be flooded, a heat exchanger may be arranged for condensing moisture contained in the process air, at which lint and impurities have settled, which are to be removed by the flooding. From EP 0 467 188 B1 a domestic appliance in the form of a tumble dryer is known, which is equipped with a compressor heat pump to reduce energy consumption. In such a tumble dryer lint, which dissipates the process air from the drying laundry, a particular problem is because the fine structures of the flowed through by the process air components, in particular the evaporator and the condenser, the heat pump particularly susceptible to clogging by fine lint, which can not be completely absorbed by a conventional lint filter are. Although a lint filter is usually provided, small particles or fine lint can still easily get to components of the heat pump during operation and settle there. In addition to the current cleaning of the lint filter, therefore, in practice, the process air supply must be cleaned at regular intervals. However, this is very expensive, since in particular the heat exchangers are relatively firmly installed in the household appliance.
Daher ist es Aufgabe der vorliegenden Erfindung, ein Hausgerät zur Pflege von Wäschestücken zu schaffen, bei dem das Anlagern von Flusen an Mitteln zur Entfeuchtung eines Prozessluftstroms reduziert werden kann.It is therefore an object of the present invention to provide a domestic appliance for the care of items of laundry, in which the attachment of lint to means for dehumidifying a process air flow can be reduced.
Diese Aufgabe wird durch ein Hausgerät, welches die Merkmale nach Patentanspruch 1 aufweist, gelöst.This object is achieved by a domestic appliance having the features of claim 1.
Das erfindungsgemäße Hausgerät zur Pflege von Wäschestücken weist einen Behälter zur Aufnahme von Wäschestücken, insbesondere eine Trommel, auf, welcher in einerThe household appliance according to the invention for the care of items of laundry has a container for receiving laundry items, in particular a drum, which in a
Prozessluftführung angeordnet ist. Der Behälter ist mit der Prozessluftführung derart inProcess air duct is arranged. The container is with the process air guide in such
Verbindung, dass die durch die Prozessluftführung strömende Prozessluft auch durch denConnection, that the process air flowing through the process air guide also by the
Behälter strömt. Darüber hinaus umfasst das Hausgerät einen ersten Wärmetauscher, welcher mit der Prozessluftführung gekoppelt und zur Entfeuchtung der aus dem Behälter austretenden Prozessluft ausgebildet ist. Ein wesentlicher Gedanke besteht darin, dass in der Prozessluftführung ein Zusatzwärmetauscher zur Flusenfilterung angeordnet ist. Durch diese Ausgestaltung wird in zuverlässiger Weise erreicht, dass feine Flusen in dem Prozessluftstrom durch den Zusatzwärmetauscher ausgefiltert werden und sich somit nicht mehr an den eigentlichen Mitteln zur Entfeuchtung der aus dem Behälter austretenden Prozessluft anlagern können. Der Zusatzwärmetauscher kühlt die durch ihn hindurch strömende Prozessluft geringfügig ab und bewirkt in geringem Maß Kondensation in der Prozessluft, jedoch zweckmäßig nur so viel, wie zum Binden feiner Flusen, welche die Prozessluft mitführt und welche insbesondere von einem an sich bekannten, vor dem Zusatzwärmetauscher vorgesehenen herkömmlichen Flusensieb nicht aufgefangen werden können, erforderlich ist.Container flows. In addition, the domestic appliance comprises a first heat exchanger which is coupled to the process air guide and designed for dehumidifying the process air emerging from the container. An essential idea is that an additional heat exchanger for lint filtering is arranged in the process air duct. By this configuration is achieved in a reliable manner that fine lint can be filtered out in the process air flow through the additional heat exchanger and thus can no longer attach to the actual means for dehumidifying the exiting the container process air. The additional heat exchanger cools the process air flowing through it slightly and causes condensation in the process air to a slight extent, but only as much as useful for binding fine lint, which entrains the process air and which in particular provided by a known, before the additional heat exchanger conventional lint filter can not be collected is required.
Vorzugsweise ist der Zusatzwärmetauscher in Richtung des Prozessluftstromes vor den Mitteln zur Entfeuchtung der Prozessluft angeordnet.Preferably, the additional heat exchanger is arranged in the direction of the process air flow in front of the means for dehumidifying the process air.
Vorzugsweise sind Kühlelemente des Arbeitsmittelkreislaufs des Hausgeräts an einer Außenseite des Zusatzwärmetauschers anliegend angeordnet. In einer derartigen Aus- gestaltung ist der Zusatzwärmetauscher direkt an den Arbeitsmittelkreislauf gekoppelt bzw. in diesem angeordnet. Durch eine derartige außenseitige Anlagerung bzw. Kontak- tierung der Kühlelemente mit dem Zusatzwärmetauscher durchdringen diese Kühlelemente nicht diesen Zusatzwärmetauscher selbst.Preferably, cooling elements of the working medium circuit of the domestic appliance are arranged adjacent to an outer side of the additional heat exchanger. In such an embodiment, the additional heat exchanger is coupled directly to the working fluid circuit or arranged in this. Such cooling elements do not penetrate this additional heat exchanger itself as a result of such external attachment or contact of the cooling elements with the additional heat exchanger.
Vorzugsweise ist der Zusatzwärmetauscher formschlüssig und/oder kraftschlüssig an den Kühlelementen angeordnet. Dies ermöglicht einerseits eine effektive Kühlung und andererseits eine mechanisch stabile Verbindung.Preferably, the additional heat exchanger is arranged positively and / or non-positively on the cooling elements. On the one hand, this enables effective cooling and, on the other hand, a mechanically stable connection.
Vorzugsweise ist der Zusatzwärmetauscher mit einer Vorspanneinrichtung, welche insbe- sondere ein Federelement sein kann, mechanisch verbunden. Diese Vorspanneinrichtung ist derart angeordnet und ausgebildet, dass sie den Zusatzwärmetauscher an die Kühlelemente andrückt. Dadurch wird eine positionsstabile Anordnung des Zusatzwärmetauschers in der Prozessluftführung erreicht und darüber hinaus eine gute Kontaktierung mit den Kühlelementen erzeugt. Somit kann der Zusatzwärmetauscher in aufwandsarmer Weise und schnell aus dem Hausgerät entnommen und wieder eingesetzt werden. Ein Reinigungsvorgang ist daher sehr aufwandsarm möglich. Die formschlüssige Verbindung sorgt darüber hinaus stets für einen ausreichenden Kontakt nach einem Wiedereinbau des Zusatzwärmetauschers in das Hausgerät. Vorzugsweise ist ein Flusensieb in Richtung des Prozessluftstromes vor dem Zusatzwärmetauscher angeordnet. Es reicht eine relativ geringe Kälteleistung aus, um zwischen dem Austritt aus der Trommel und dem Eintritt in den ersten Wärmetauscher eine geringe, zum Auffangen der Flusen aber ausreichende Kondensation der feuchten Prozessluft aus der mit feuchter Wäsche gefüllten Trommel zu erreichen.Preferably, the additional heat exchanger with a biasing device, which may be a spring element in particular, mechanically connected. This biasing device is arranged and configured such that it presses the additional heat exchanger to the cooling elements. As a result, a positionally stable arrangement of the additional heat exchanger in the process air duct is achieved and, moreover, good contact with the cooling elements is produced. Thus, the additional heat exchanger can be removed in a low-cost manner and quickly from the household appliance and used again. A cleaning process is therefore possible with very little effort. In addition, the positive connection always ensures sufficient contact after a replacement of the additional heat exchanger in the domestic appliance. Preferably, a lint filter is arranged in the direction of the process air flow upstream of the additional heat exchanger. A relatively low cooling capacity suffices in order to achieve a low condensation of the moist process air from the drum filled with wet laundry between the exit from the drum and the entry into the first heat exchanger, but sufficient to catch the lint.
Besonders bevorzugt ist der Zusatzwärmetauscher derart angeordnet und befestigt, dass er ohne Benutzung eines Werkzeuges aus dem Hausgerät entnehmbar ist. Dies ermöglicht eine unkomplizierte Entnahme und Reinigung durch eine Bedienperson des Hausge- rätes; eine Intervention einer besonders geschulten und mit passendem Werkzeug ausgestatteten Fachperson im Rahmen einer kostenträchtigen Wartungsmaßnahme ist nicht mehr erforderlich.Particularly preferably, the additional heat exchanger is arranged and fastened such that it can be removed without the use of a tool from the domestic appliance. This allows uncomplicated removal and cleaning by an operator of the household appliance; an intervention of a specially trained and equipped with appropriate tool specialist in the context of a costly maintenance measure is no longer necessary.
In bevorzugter Weise ist das Hausgerät als Wäschetrockner ausgebildet.Preferably, the domestic appliance is designed as a tumble dryer.
Durch die nicht feste Verbauung des Zusatzwärmetauschers in dem Hausgerät ist ein leichtes und unkompliziertes Entnehmen des Zusatzwärmetauschers aus dem Hausgerät und insbesondere aus dem Arbeitsmittelkreislauf möglich. Dennoch erlaubt insbesondere die form- und/oder kraftschlüssige Verbindung mit dem Arbeitsmittelkreislauf eine stabile Positionierung. Die nicht feste Verbauung des Zusatzwärmetauschers weist einen erheblichen Vorteil auf, da der Zusatzwärmetauscher in regelmäßigen Abständen durch eine Flüssigkeit, insbesondere Wasser, abgespült werden muss und dafür leicht zu entfernen ist und somit leicht und aufwandsarm gereinigt werden kann.Due to the non-fixed obstruction of the additional heat exchanger in the household appliance easy and uncomplicated removal of the additional heat exchanger from the domestic appliance and in particular from the working fluid circuit is possible. Nevertheless, in particular the positive and / or non-positive connection with the working fluid circuit allows a stable positioning. The non-fixed obstruction of the additional heat exchanger has a significant advantage, since the additional heat exchanger must be rinsed at regular intervals by a liquid, especially water, and it is easy to remove and thus can be easily and easily cleaned.
Ausführungsbeispiele der Erfindung werden nachfolgend anhand der schematischen Zeichnung näher erläutert. Darin zeigen:Embodiments of the invention will be explained in more detail with reference to the schematic drawing. Show:
Fig. 1 eine schematische Darstellung eines Wäschetrockners; undFig. 1 is a schematic representation of a tumble dryer; and
Fig. 2 eine Schnittdarstellung eines Zusatzwärmetauschers des Wäschetrockners.Fig. 2 is a sectional view of an additional heat exchanger of the tumble dryer.
In den Figuren werden gleiche oder funktionsgleiche Elemente mit den gleichen Bezugszeichen versehen. In einer schematischen Blockbilddarstellung in Fig. 1 sind die für vorliegende Erläuterung wesentlichen Elemente eines Hausgeräts 1 zur Pflege von Wäschestücken dargestellt. Das Hausgerät 1 zur Pflege von Wäschestücken ist als Wäschetrockner 1 ausgebildet. Der Wäschetrockner 1 ist als Umlufttrockner ausgebildet und umfasst einen Behälter 2 zur Aufnahme von Wäschestücken. Der Behälter 2 ist in einer Prozessluftführung 3, welche im Ausführungsbeispiel als Prozessluftkreislauf 3 ausgebildet ist, angeordnet. Dabei durchströmt die in dem Prozessluftkreislauf 3 strömende Prozessluft auch den Behälter 2.In the figures, identical or functionally identical elements are provided with the same reference numerals. In a schematic block diagram representation in Fig. 1, the essential elements for present explanation of a domestic appliance 1 for the care of laundry items are shown. The household appliance 1 for the care of items of laundry is designed as a tumble dryer 1. The tumble dryer 1 is designed as a circulating air dryer and comprises a container 2 for receiving laundry items. The container 2 is arranged in a process air duct 3, which is designed as a process air circuit 3 in the exemplary embodiment. In this case, the process air flowing in the process air circuit 3 also flows through the container 2.
Die durch den Behälter 2 geleitete Trockenluft bzw. Prozessluft wird vor dem Eintritt in die Trommel bzw. in den Behälter 2 durch einen zweiten Wärmetauscher 5, welcher als Verflüssiger 5 für ein in einem Arbeitsmittelkreislauf 4 umlaufendes Arbeitsmittel dient, und nach Bedarf durch eine zusätzliche, vorliegend nicht dargestellte Heizeinrichtung erhitzt und nach dem Austritt aus dem Behälter 2 zur Kondensation von in der Prozessluft enthaltener Feuchtigkeit durch einen ersten Wärmetauscher 6, welcher als Verdampfer 6 für das in dem Arbeitsmittelkreislauf 4 umlaufende Arbeitsmittel dient, abgekühlt. Die Prozessluft wird von einem Gebläse 1 1 angetrieben und strömt in Richtung der Pfeile durch den Prozessluftkreislauf 3. Innerhalb des Behälters 2 kommt die erhitzte Prozessluft mit der zu trocknenden Wäsche in Berührung und nimmt dabei Feuchtigkeit auf.The fed through the container 2 dry air or process air is before entering the drum or in the container 2 by a second heat exchanger 5, which serves as a condenser 5 for circulating in a working fluid circuit 4 working equipment, and as required by an additional not shown heater heated and after exiting the container 2 for condensation of moisture contained in the process air through a first heat exchanger 6, which serves as an evaporator 6 for circulating in the working fluid circuit 4 working means cooled. The process air is driven by a blower 1 1 and flows in the direction of the arrows through the process air circuit 3. Within the container 2, the heated process air comes into contact with the laundry to be dried and absorbs moisture.
Der Arbeitsmittelkreislauf 4 ist mit dem Prozessluftkreislauf 3 über den Verflüssiger 5, den Verdampfer 6 und einen nachfolgend zu beschreibenden Zusatzwärmetauscher 9, der die Funktion eines zusätzlichen Verdampfers 9 hat, thermisch gekoppelt. Der Arbeitsmittelkreislauf 4 bildet mit dem Verflüssiger 5, dem Verdampfer 6, dem Zusatzwärmetauscher 9 sowie einem Kompressor 7 und einer Drossel 8 eine Wärmepumpe 4, 5, 6, 7, 8, 9. Der Verflüssiger 5 ist dem Kompressor 7 nachgeordnet und somit druckseitig angeordnet. Die dem Verflüssiger 5 nach- und dem Verdampfer 6 vorgeordnete Drossel 8 in dem Arbeitsmittelkreislauf 4 bewirkt ein zur Verdampfung des Arbeitsmittels notwendiges Druckgefälle zwischen dem Verflüssiger 5 und dem Verdampfer 6. Im Verdampfer 6 wird so viel Wärme aus der Prozessluft entnommen, dass die darin enthaltene, in der Trommel 2 aufge- nommene Feuchtigkeit auskondensiert; das Kondensat wird durch eine an sich bekannte und in Figur 1 nicht dargestellte Einrichtung am Verdampfer 6 aus der Prozessluft extrahiert und abgeführt. In dem Prozessluftkreislauf 3 ist der Zusatzwärmetauscher 9 angeordnet. Er ist zur FIu- senfilterung ausgebildet und in Richtung des Prozessluftstromes vor dem ersten Wärmetauscher 5 und dem zweiten Wärmetauscher 6 positioniert. Er kühlt die durch ihn hindurch strömende Prozessluft geringfügig ab und bewirkt in geringem Maß Kondensation in der Prozessluft, jedoch nur so viel, wie zum Binden feiner Flusen, welche die Prozessluft aus der Trommel 2 mitführt und von einem an sich bekannten, im Prozessluftkreislauf 3 vor dem Zusatzwärmetauscher 9 vorgesehenen Flusensieb 10 nicht aufgefangen werden können, erforderlich ist.The working medium circuit 4 is thermally coupled to the process air circuit 3 via the condenser 5, the evaporator 6 and an additional heat exchanger 9 to be described below, which has the function of an additional evaporator 9. The working fluid circuit 4 forms with the condenser 5, the evaporator 6, the additional heat exchanger 9 and a compressor 7 and a throttle 8, a heat pump 4, 5, 6, 7, 8, 9. The condenser 5 is arranged downstream of the compressor 7 and thus arranged on the pressure side , The condenser 5 nach- and the evaporator 6 upstream throttle 8 in the working fluid circuit 4 causes a necessary for evaporation of the working fluid pressure gradient between the condenser 5 and the evaporator 6. In the evaporator 6 so much heat is removed from the process air that contained therein , in the drum 2 condensed moisture condenses out; the condensate is extracted and removed from the process air by means known per se and not shown in FIG. 1 at the evaporator 6. In the process air circuit 3, the additional heat exchanger 9 is arranged. It is designed for flow filtration and positioned in the direction of the process air flow upstream of the first heat exchanger 5 and the second heat exchanger 6. It cools the process air flowing through it slightly and causes condensation to a small degree in the process air, but only as much as for binding fine lint, which entrains the process air from the drum 2 and in the process air circuit 3 of a known per se the additional heat exchanger 9 provided lint filter 10 can not be collected is required.
In Figur 2 ist eine Schnittdarstellung gezeigt, welche die Anordnung des Zusatzwärmetau- schers 9 in dem Prozessluftkreislauf 3 zeigt. Kühlelemente 13, 14, 15 und 16 sind an einer ersten Außenseite 91 des Zusatzwärmetauschers 9 positioniert. Die erste Außenseite 91 ist im Betrieb von der strömenden Prozessluft abgewandt. Die Kühlelemente 13 bis 16 sind Teile eines als Mäander verlegten und vom Arbeitsmittel durchströmten Rohrstücks. Der Zusatzwärmetauscher ist aufgebaut aus einer Vielzahl von Platten 90, die senkrecht zur Zeichnungsebene unter Belassung von Zwischenräumen für die in Richtung der Pfeile strömende Prozessluft 3 aufeinander gestapelt sind. Figur 2 zeigt eine solche Platte 90. Die auf der Platte 90 hervortretenden Strukturen 93 bilden Kanäle oder Führungseinrichtungen für die Prozessluft und vergrößern die Oberflächen, auf denen sich Flusen anlagern können. Der Zusatzwärmetauscher 9 wird durch ein an einer der ersten Außenseite 91 gegenüber liegenden zweiten Außenseite 92 anliegendes Federelement 12 mit der ersten Außenseite 91 an die Kühlelemente 13 bis 16 angedrückt. Das Federelement 12 ist beispielsweise an einer Innenwand eines Kanals des Prozessluftkreislaufes 3 abgestützt oder befestigt und erzeugt eine Vorspannkraft, welche den Zusatzwärmetauscher 9 an die Kühlelemente 13 bis 16 andrückt. Der Zusatzwärmetauscher 9 ist mit den Kühlelementen 13 bis 16 formschlüssig und kraftschlüssig verbunden, wodurch eine effektive thermische Kopplung gewährleistet ist. Die Platten bestehen aus Aluminium oder einem anderen gut wärmeleitfähigen Material.FIG. 2 shows a sectional view showing the arrangement of the additional heat exchanger 9 in the process air circuit 3. Cooling elements 13, 14, 15 and 16 are positioned on a first outer side 91 of the additional heat exchanger 9. The first outer side 91 faces away from the flowing process air during operation. The cooling elements 13 to 16 are parts of a laid as a meander and traversed by the working medium pipe section. The additional heat exchanger is composed of a plurality of plates 90, which are stacked perpendicular to the plane of the drawing leaving gaps for the process air 3 flowing in the direction of the arrows. Figure 2 shows such a plate 90. The protruding on the plate 90 structures 93 form channels or guide means for the process air and enlarge the surfaces on which lint can accumulate. The additional heat exchanger 9 is pressed against the cooling elements 13 to 16 by a spring element 12 bearing against the second outer side 92 opposite the first outer side 91 with the first outer side 91. The spring element 12 is supported or fixed, for example, on an inner wall of a channel of the process air circuit 3 and generates a biasing force, which presses the additional heat exchanger 9 to the cooling elements 13 to 16. The additional heat exchanger 9 is positively and non-positively connected to the cooling elements 13 to 16, whereby an effective thermal coupling is ensured. The plates are made of aluminum or another good thermal conductive material.
Im Betrieb des Wäschetrockners 1 wird der Zusatzwärmetauscher 9 durch das die Kühl- elemente 13 bis 16 durchströmende Arbeitsmittel gekühlt, so dass er ein geringes Maß von Kondensation in der vorbeiströmenden Prozessluft bewirkt. Feine Flusen, die durch solchermaßen am Zusatzwärmetauscher 9 gebildetes Kondensat gebunden werden, lagern sich auf den Platten 90 ab. Der Zusatzwärmetauscher 9 ist aufgrund seiner soeben beschriebenen Gestaltung einfach aus dem Prozessluftkreislauf 3 entnehmbar und kann somit einfach gereinigt werden, um die auf den Platten 90 abgelagerten feinen Flusen zu entfernen. Der Zusatzwärmetauscher 9 verhindert somit einfach und zuverlässig eine Verunreinigung des im Prozessluftkreislauf 3 auf ihn folgenden Verdampfers 6, welcher entsprechend dem Stand der Technik relativ fein strukturiert und somit relativ anfällig für eine Verunreinigung durch Flusen ist. Es kommt hinzu, dass es kaum erwartbar ist, dass ein Verdampfer 6 in einem Wäschetrockner 1 durch eine Person, die den Wäschetrockner 1 gewöhnlich bedient, gereinigt wird. Vielmehr ist solches eine Aufgabe für eine Person, die zur Wartung und Reparatur eines solchen Wäschetrockners 1 ausgebildet ist, und zu erledigen im Rahmen eines Kundendienstes. Der vorliegend beschriebene Wäschetrock- ner 1 mit Zusatzwärmetauscher 9 hingegen vermeidet die Notwendigkeit zur Inanspruchnahme eines Kundendienstes für die Reinigung des Gerätes von feinen Flusen, indem der Zusatzwärmetauscher 9 ohne Benutzung eines Werkzeuges, gleichermaßen wie das FIu- senfilter 10 gemäß bekannter Praxis, entnehmbar ist. During operation of the tumble dryer 1, the additional heat exchanger 9 is cooled by the working medium flowing through the cooling elements 13 to 16, so that it causes a small degree of condensation in the process air flowing past. Fine lint, which are bound by condensate thus formed at the additional heat exchanger 9, deposited on the plates 90 from. The additional heat exchanger 9 is due to its just described design can be easily removed from the process air circuit 3 and thus can be easily cleaned to remove the deposited on the plates 90 fine lint. The additional heat exchanger 9 thus prevents easy and reliable contamination of the following in the process air circuit 3 on him evaporator 6, which is structured relatively fine according to the prior art and thus relatively prone to contamination by fluff. In addition, it is hardly expected that an evaporator 6 in a clothes dryer 1 will be cleaned by a person who usually operates the clothes dryer 1. Rather, such is a task for a person who is trained for the maintenance and repair of such a clothes dryer 1, and to do within a customer service. By contrast, the tumble dryer 1 with additional heat exchanger 9 described here avoids the need for customer service for cleaning the device of fine lint by removing the additional heat exchanger 9 without using a tool, in the same way as the flow filter 10 according to known practice.

Claims

Patentansprüche claims
1. Hausgerät zur Pflege von Wäschestücken, mit einem Behälter (2) zur Aufnahme von Wäschestücken, einer Prozessluftführung (3), welche mit dem Behälter (2) verbunden ist, wobei Prozessluft durch den Behälter (2) strömt, und mit einem ersten Wärmetauscher (6), welcher mit der Prozessluftführung (3) gekoppelt ist und zur Entfeuchtung der aus dem Behälter (2) austretenden Prozessluft ausgebildet ist, dadurch gekennzeichnet, dass in der Prozessluftführung (3) ein Zusatzwärmetauscher (9) zur Flusenfilterung angeordnet ist.A domestic appliance for the care of laundry items, comprising a container (2) for receiving laundry items, a process air duct (3) which is connected to the container (2), process air flowing through the container (2), and a first heat exchanger (6), which is coupled to the process air guide (3) and designed for dehumidifying the emerging from the container (2) process air, characterized in that in the process air guide (3) an additional heat exchanger (9) is arranged for lint filtering.
2. Hausgerät nach Anspruch 1 , bei dem der Zusatzwärmetauscher (9) in Richtung des Prozessluftstromes vor dem ersten Wärmetauscher (6) angeordnet ist.2. Domestic appliance according to claim 1, wherein the additional heat exchanger (9) in the direction of the process air flow upstream of the first heat exchanger (6) is arranged.
3. Hausgerät nach einem der vorigen Ansprüche, welches eine Wärmepumpe (4, 5, 6, 7, 8, 9) mit einem Arbeitsmittelkreislauf (4) aufweist, in welcher Wärmepumpe3. Domestic appliance according to one of the preceding claims, which has a heat pump (4, 5, 6, 7, 8, 9) with a working medium circuit (4), in which heat pump
(4, 5, 6, 7, 8) der erste Wärmetauscher (6) einen Verdampfer (6) bildet.(4, 5, 6, 7, 8), the first heat exchanger (6) forms an evaporator (6).
4. Hausgerät nach Anspruch 3, bei dem die Wärmepumpe einen Verflüssiger (5) aufweist, welcher als zweiter Wärmetauscher (5) zur Erwärmung der Prozessluft in der Prozessluftführung (3) angeordnet ist.4. Domestic appliance according to claim 3, wherein the heat pump has a condenser (5) which is arranged as a second heat exchanger (5) for heating the process air in the process air duct (3).
5. Hausgerät nach einem der Ansprüche 3 und 4, bei dem der Zusatzwärmetauscher (9) mit einer Funktion als zusätzlicher Verdampfer (9) an den Arbeitsmittelkreislauf (4) angebunden ist.5. Domestic appliance according to one of claims 3 and 4, wherein the additional heat exchanger (9) is connected with a function as an additional evaporator (9) to the working medium circuit (4).
6. Hausgerät nach Anspruch 5, bei dem der Zusatzwärmetauscher in dem Arbeitsmittelkreislauf (4) in Reihe zu dem Verdampfer (6) geschaltet ist.6. Domestic appliance according to claim 5, wherein the additional heat exchanger in the working fluid circuit (4) in series with the evaporator (6) is connected.
7. Hausgerät nach einem der Ansprüche 4 bis 6, bei dem Kühlelemente (13 bis 16) des Arbeitsmittelkreislaufs (4) an einer Außenseite (91 ) des Zusatzwärmetauschers (9) anliegen. 7. Domestic appliance according to one of claims 4 to 6, wherein the cooling elements (13 to 16) of the working medium circuit (4) on an outer side (91) of the additional heat exchanger (9).
8. Hausgerät nach Anspruch 7, bei dem Zusatzwärmetauscher (9) form- und/oder kraftschlüssig an den Kühlelementen (13 bis 16) anliegt.8. Domestic appliance according to claim 7, wherein the additional heat exchanger (9) positive and / or non-positively applied to the cooling elements (13 to 16).
9. Hausgerät nach einem der Ansprüche 7 und 8, bei dem der Zusatzwärmetauscher (9) mit einer Vorspanneinrichtung (1 1 ), insbesondere ein Federelement (11 ), me- chanisch verbunden ist, welche den Zusatzwärmetauscher (9) an die Kühlelemente (13 bis 16) andrückt.9. Domestic appliance according to one of claims 7 and 8, wherein the additional heat exchanger (9) with a biasing means (1 1), in particular a spring element (11), is mechanically connected, which the additional heat exchanger (9) to the cooling elements (13 to 16).
10. Hausgerät nach einem der vorigen Ansprüche, bei dem ein Flusensieb (10) in Richtung des Prozessluftstromes vor dem Zusatzwärmetauscher (9) angeordnet ist.10. Domestic appliance according to one of the preceding claims, wherein a lint filter (10) in the direction of the process air flow in front of the additional heat exchanger (9) is arranged.
1 1. Hausgerät nach einem der vorigen Ansprüche, bei dem der Zusatzwärmetauscher (9) ohne Benutzung eines Werkzeuges entnehmbar ist.1 1. Domestic appliance according to one of the preceding claims, wherein the additional heat exchanger (9) can be removed without the use of a tool.
12. Hausgerät nach einem der vorhergehenden Ansprüche, welches als Wäschetrockner (1 ) ausgebildet ist. 12. Domestic appliance according to one of the preceding claims, which is designed as a tumble dryer (1).
EP06830405.4A 2005-12-29 2006-12-06 Domestic appliance for the care of washed articles Not-in-force EP1974088B1 (en)

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DE102005062940A DE102005062940A1 (en) 2005-12-29 2005-12-29 A method for drying washing has a heat pump by which circulated air through the washing chamber is dried and heated and an additional heat pump evaporator is arranged to predry the circulated air stream
PCT/EP2006/069359 WO2007077084A1 (en) 2005-12-29 2006-12-06 Domestic appliance for the care of washed articles

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US20090223077A1 (en) 2009-09-10
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US7866057B2 (en) 2011-01-11

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