EP2468949B1 - Clothes drier with temperature-controlled auxiliary heat exchanger - Google Patents

Clothes drier with temperature-controlled auxiliary heat exchanger Download PDF

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Publication number
EP2468949B1
EP2468949B1 EP11009967.8A EP11009967A EP2468949B1 EP 2468949 B1 EP2468949 B1 EP 2468949B1 EP 11009967 A EP11009967 A EP 11009967A EP 2468949 B1 EP2468949 B1 EP 2468949B1
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EP
European Patent Office
Prior art keywords
heat exchanger
processing air
additional heat
temperature
blower
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EP11009967.8A
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German (de)
French (fr)
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EP2468949A3 (en
EP2468949A2 (en
Inventor
Roland Gerig
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V-Zug AG
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V-Zug AG
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Priority to SI201130940A priority Critical patent/SI2468949T1/en
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    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/08—Control circuits or arrangements thereof
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/28—Air properties
    • D06F2103/36—Flow or velocity
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/50—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to heat pumps, e.g. pressure or flow rate
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/16—Air properties
    • D06F2105/24—Flow or velocity
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/30—Blowers
    • 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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/20—Parameters relating to constructional components, e.g. door sensors

Definitions

  • the invention relates to a clothes dryer with heat pump and additional heat exchanger and a method for its operation.
  • a clothes dryer with heat pump usually comprises a drum for receiving the laundry to be dried, which is arranged in a process air circuit.
  • heated process air is passed through the drum, then it is cooled to remove water, reheated and returned to the drum.
  • a heat pump cycle is provided, in which a medium through a condenser, a throttle body (expansion valve), an evaporator and a compressor is fed back to the condenser.
  • the process air is heated with the condenser and cooled with the evaporator.
  • EP 1 983 095 a clothes dryer is described, in the heat pump cycle an additional heat exchanger is arranged to extract heat to the system.
  • the operation of the additional heat exchanger is controlled by a temperature in the heat pump cycle.
  • DE 102008040853 describes in Fig. 3 a clothes dryer with two additional heat exchangers, of which one cools the process air cycle, the other the heat pump cycle.
  • the signal is used to control a fan for cooling the additional heat exchanger.
  • At least one temperature sensor is arranged in the heat pump cycle.
  • the dryer on a control with which a heat-extractable from the additional heat exchanger the process air circulation heat output is dependent on the signal of the temperature sensor controllable.
  • the invention is based on the idea that the arrangement of the additional heat exchanger in the process air circuit is advantageous, since in this way in the additional heat exchanger of the process air heat and moisture can be withdrawn simultaneously, which improves the drying effect.
  • the additional heat exchanger is now, although it is arranged in the process air circuit, not controlled by a temperature in the process air circuit. Rather, it is controlled by a temperature in the heat pump cycle. This takes into account the fact that, in the event of overheating of the system, first the heat pump cycle is damaged, so that a higher level of safety is achieved in the solution according to the invention.
  • the invention also relates to a method for a corresponding operation of the heat exchanger
  • FIG. 1 shows a block diagram of the most important components of the tumble dryer.
  • the tumble dryer after Fig. 1 has a drum 1 for receiving the laundry to be dried. It is provided a process air cycle (which in Fig. 1 shown by solid lines), in which heated process air passed through the drum 1, then cooled and then reheated and fed back into the drum 1.
  • an optional additional electrical heating (starting heating) 9 may be provided, which allows the process air to be supplied with heat in a targeted manner, for example when starting the appliance, or it can be used to control the temperature level generally raise in the process air circuit.
  • a blower 10 serves to pump over the process air.
  • a heat pump cycle is provided (the path of the pumped by the heat pump cycle medium in Fig. 1 shown with dotted lines).
  • the medium is conveyed by a compressor 2 to a condenser 3, then via a throttle body 5, for example in the form of capillaries or an expansion valve, to an evaporator 6 and then back to the compressor 2.
  • the evaporator 6 serves to cool the process air and In this way, water is withdrawn while the condenser 3 serves to reheat the process air so that it can absorb new water.
  • an additional heat exchanger 4 is provided in the process air cycle. As mentioned above, it serves to extract heat from the process air cycle. Preferably, it is arranged between the drum 1 and the evaporator 6, since it can extract water there from the air at the same time.
  • the additional heat exchanger 4 is an air-to-air heat exchanger, which is traversed on the one hand by the process air and on the other hand by ambient air, wherein the process air and the ambient air are preferably spatially separated and can not mix.
  • a fan 7 with which the ambient air is passed through the additional heat exchanger 4 in order to cool it.
  • the extracted from the additional heat exchanger 4 the process air circulation heat output is determined by the speed of the blower 7.
  • This speed is determined by a controller 8 of the device, depending on at least one temperature in the heat pump cycle.
  • a temperature sensor 11 is arranged in the heat pump cycle.
  • the controller is designed to the speed of the fan 7 depending on the signal of the temperature sensor 11, for example by the fan 7 is operated at a higher power when the temperature rises.
  • the fan can be turned on only when the temperature exceeds a predetermined threshold.
  • the speed of the fan 7 is increased by the controller 8 with increasing temperature continuously or at least in several steps.
  • the temperature-dependent control of the fan 7 allows, e.g. When starting the tumble dryer to supply the process air circuit very quickly energy, so that the process temperature is reached quickly, but then in normal operation overheating of the heat pump cycle is prevented.
  • the temperature of the running medium in the heat pump cycle is determined where this temperature corresponds approximately to the condensation temperature of the medium. This is the case between capacitor 3 and throttle member 5, or the output side of the capacitor 3 or the input side of the throttle body. 5
  • the present invention can be used independently of the medium used in the heat pump cycle, for example in a heat pump cycle with R134a or in one with CO 2 .
  • the table shows the amount of cooling air as a percentage of the volume flow of the delivered air volume relative to the maximum amount of air that can be conveyed by the fan 7.
  • the above table is to be understood as an example. Depending on the maximum delivery rate of the fan 7, depending on the medium in the heat pump cycle as well as on other device parameters, other values may be used in particular.
  • the gradation may also be coarser or finer, or a continuous dependence between flow rate and temperature may be used. A multi-stage dependency or a continuous dependency allows a finer control of energy extraction than a "binary" on-off control.
  • step changes are preferably not made arbitrarily fast, but e.g. at most once a minute.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft einen Wäschetrockner mit Wärmepumpe und Zusatzwärmetauscher sowie ein Verfahren zu dessen Betrieb.The invention relates to a clothes dryer with heat pump and additional heat exchanger and a method for its operation.

Hintergrundbackground

Ein Wäschetrockner mit Wärmepumpe umfasst in der Regel eine Trommel zur Aufnahme der zu trocknenden Wäsche, die in einem Prozessluftkreislauf angeordnet ist. Im Prozessluftkreislauf wird erwärmte Prozessluft durch die Trommel geführt, dann wird sie zum Wasserentzug abgekühlt, wieder aufgeheizt und in die Trommel zurückgeführt. Weiter ist ein Wärmepumpenkreislauf vorgesehen, in welchem ein Medium durch einen Kondensator, ein Drosselorgan (Expansionsventil), einen Verdampfer und einen Kompressor zurück zum Kondensator geführt wird. Mit dem Kondensator wird die Prozessluft erwärmt und mit dem Verdampfer abgekühlt.A clothes dryer with heat pump usually comprises a drum for receiving the laundry to be dried, which is arranged in a process air circuit. In the process air circulation heated process air is passed through the drum, then it is cooled to remove water, reheated and returned to the drum. Further, a heat pump cycle is provided, in which a medium through a condenser, a throttle body (expansion valve), an evaporator and a compressor is fed back to the condenser. The process air is heated with the condenser and cooled with the evaporator.

In CH 699 018 wird ein Wäschetrockner beschrieben, in dessen Prozessluftkreislauf ein Zusatzwärmetauscher angeordnet ist, um dem System Wärme zu entziehen. Der Betrieb des Zusatzwärmetauschers wird über die Temperatur der Prozessluft gesteuert.In CH 699 018 a clothes dryer is described, in the process air circuit, an additional heat exchanger is arranged to extract heat to the system. The operation of the additional heat exchanger is controlled by the temperature of the process air.

In EP 1 983 095 wird ein Wäschetrockner beschrieben, in dessen Wärmepumpenkreislauf ein Zusatzwärmetauscher angeordnet ist, um dem System Wärme zu entziehen. Der Betrieb des Zusatzwärmetauschers wird über eine Temperatur im Wärmepumpenkreislauf gesteuert.In EP 1 983 095 a clothes dryer is described, in the heat pump cycle an additional heat exchanger is arranged to extract heat to the system. The operation of the additional heat exchanger is controlled by a temperature in the heat pump cycle.

DE 102008040853 beschreibt in Fig. 3 einen Wäschetrockner mit zwei Zusatzwärmetauschern, von denen der eine den Prozessluftkreislauf kühlt, der andere den Wärmepumpenkreislauf. Im Wärmepumpenkreislauf sind Temperatursensoren vorgesehen, deren Signal benutzt wird, um ein Gebläse zum Kühlen der Zusatzwärmetauscher zu steuern. DE 102008040853 describes in Fig. 3 a clothes dryer with two additional heat exchangers, of which one cools the process air cycle, the other the heat pump cycle. In the heat pump cycle temperature sensors are provided, the signal is used to control a fan for cooling the additional heat exchanger.

In beiden Fällen kann mit dem Zusatzwärmetauscher eine Überhitzung des Systems vermieden werden.In both cases, with the additional heat exchanger overheating of the system can be avoided.

Darstellung der ErfindungPresentation of the invention

Es stellt sich die Aufgabe, einen Wäschetrockner bzw. ein Verfahren zu dessen Betrieb bereitzustellen, welcher bzw. welches eine gute Effizienz mit hoher Betriebssicherheit verbindet.It has as its object to provide a tumble dryer or a method for its operation, which or which combines good efficiency with high reliability.

Diese Aufgabe wird vom Gegenstand der unabhängigen Ansprüche erfüllt.This object is achieved by the subject matter of the independent claims.

Demgemäss ist im Wärmepumpenkreislauf mindestens ein Temperatursensor angeordnet. Weiter weist der Wäschetrockner eine Steuerung auf, mit der eine vom Zusatzwärmetauscher dem Prozessluftkreislauf entziehbare Wärmeleistung abhängig vom Signal des Temperatursensors steuerbar ist.Accordingly, at least one temperature sensor is arranged in the heat pump cycle. Next, the dryer on a control with which a heat-extractable from the additional heat exchanger the process air circulation heat output is dependent on the signal of the temperature sensor controllable.

Der Erfindung liegt die Idee zugrunde, dass die Anordnung des Zusatzwärmetauschers im Prozessluftkreislauf von Vorteil ist, da auf diese Weise im Zusatzwärmetauscher der Prozessluft gleichzeitig Wärme und auch Feuchtigkeit entzogen werden kann, was die Trockenwirkung verbessert. Andererseits wird nun der Zusatzwärmetauscher aber, obwohl er im Prozessluftkreislauf angeordnet ist, nicht von einer Temperatur im Prozessluftkreislauf gesteuert. Vielmehr wird er von einer Temperatur im Wärmepumpenkreislauf gesteuert. Dies trägt dem Umstand Rechnung, dass bei einer Überhitzung des Systems zuerst der Wärmepumpenkreislauf Schaden nimmt, so dass in der erfindungsgemässen Lösung eine höhere Sicherheit erreicht wird.The invention is based on the idea that the arrangement of the additional heat exchanger in the process air circuit is advantageous, since in this way in the additional heat exchanger of the process air heat and moisture can be withdrawn simultaneously, which improves the drying effect. On the other hand, however, the additional heat exchanger is now, although it is arranged in the process air circuit, not controlled by a temperature in the process air circuit. Rather, it is controlled by a temperature in the heat pump cycle. This takes into account the fact that, in the event of overheating of the system, first the heat pump cycle is damaged, so that a higher level of safety is achieved in the solution according to the invention.

Demgegenüber wird bei bekannten Lösungen, die den Zusatzwärmetauscher im Prozessluftkreislauf anordnen, dessen Leistung durch eine Temperatur des Prozessluftkreislaufs gesteuert. Eine Temperatur, die bei bekannten Lösungen im Wärmepumpenkreislauf gemessen wird, dient andererseits nur zur Steuerung eines Zusatzwärmetauschers im Wärmepumpenkreislauf. Bei der erfindungsgemässen Lösung ist der Zusatzwärmetauscher im Prozessluftkreislauf angeordnet, doch wird er dennoch über eine Temperatur des Wärmepumpenkreislaufs gesteuert, was in der oben erwähnten Weise gleichzeitig zu höherer Effizienz und Sicherheit führt.In contrast, in known solutions which arrange the additional heat exchanger in the process air cycle, its performance is controlled by a temperature of the process air cycle. A temperature which is measured in known solutions in the heat pump cycle, on the other hand only serves to control an additional heat exchanger in the heat pump cycle. In the solution according to the invention, the additional heat exchanger is arranged in the process air circuit, but it is still controlled by a temperature of the heat pump cycle, which simultaneously leads to higher efficiency and safety in the manner mentioned above.

Die Erfindung betrifft auch ein Verfahren zu einem entsprechenden Betrieb des Wärmetauschers,The invention also relates to a method for a corresponding operation of the heat exchanger,

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Ausgestaltungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und aus der nun folgenden Beschreibung anhand der Figur. Diese zeigt ein Blockdiagramm der wichtigsten Komponenten des Wäschetrockners.Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIG. This shows a block diagram of the most important components of the tumble dryer.

Wege zur Ausführung der ErfindungWays to carry out the invention

Der Wäschetrockner nach Fig. 1 besitzt eine Trommel 1 zur Aufnahme der zu trocknenden Wäsche. Es ist ein Prozessluftkreislauf vorgesehen (welcher in Fig. 1 mit durchgezogenen Linien dargestellt ist), in welchem erwärmte Prozessluft durch die Trommel 1 geleitet, sodann abgekühlt und danach wieder aufgeheizt und zurück in die Trommel 1 geführt wird.The tumble dryer after Fig. 1 has a drum 1 for receiving the laundry to be dried. It is provided a process air cycle (which in Fig. 1 shown by solid lines), in which heated process air passed through the drum 1, then cooled and then reheated and fed back into the drum 1.

Im Prozessluftkreislauf, insbesondere vor der Trommel 1, kann eine optionale elektrische Zusatzheizung (Startheizung) 9 vorgesehen sein, welche es erlaubt, der Prozessluft gezielt Wärme zuzuführen, z.B. beim Starten des Geräts, oder sie kann verwendet werden, um das Temperaturniveau im Prozessluftkreislauf allgemein anzuheben. Ein Gebläse 10 dient zum Umpumpen der Prozessluft.In the process air cycle, in particular in front of the drum 1, an optional additional electrical heating (starting heating) 9 may be provided, which allows the process air to be supplied with heat in a targeted manner, for example when starting the appliance, or it can be used to control the temperature level generally raise in the process air circuit. A blower 10 serves to pump over the process air.

Weiter ist ein Wärmepumpenkreislauf vorgesehen (wobei der Pfad des vom Wärmepumpenkreislauf geförderten Mediums in Fig. 1 mit gepunkteten Linien dargestellt ist). Das Medium wird von einem Kompressor 2 zu einem Kondensator 3 gefördert, dann über ein Drosselorgan 5, z.B. in Form einer Kapillaren oder eines Expansionsventils, zu einem Verdampfer 6 und dann wieder zurück zum Kompressor 2. Der Verdampfer 6 dient dazu, die Prozessluft abzukühlen und ihr auf diese Weise Wasser zu entziehen, während der Kondensator 3 dazu dient, die Prozessluft wieder zu erwärmen, so dass sie neues Wasser aufnehmen kann.Further, a heat pump cycle is provided (the path of the pumped by the heat pump cycle medium in Fig. 1 shown with dotted lines). The medium is conveyed by a compressor 2 to a condenser 3, then via a throttle body 5, for example in the form of capillaries or an expansion valve, to an evaporator 6 and then back to the compressor 2. The evaporator 6 serves to cool the process air and In this way, water is withdrawn while the condenser 3 serves to reheat the process air so that it can absorb new water.

Wie aus Fig. 1 weiter ersichtlich, ist im Prozessluftkreislauf ein Zusatzwärmetauscher 4 vorgesehen. Wie eingangs erwähnt, dient er dazu, dem Prozessluftkreislauf Wärme zu entziehen. Vorzugsweise ist er zwischen der Trommel 1 und dem Verdampfer 6 angeordnet, da er dort der Luft gleichzeitig auch Wasser entziehen kann.How out Fig. 1 further apparent, an additional heat exchanger 4 is provided in the process air cycle. As mentioned above, it serves to extract heat from the process air cycle. Preferably, it is arranged between the drum 1 and the evaporator 6, since it can extract water there from the air at the same time.

Der Zusatzwärmetauscher 4 ist ein Luft-Luft-Wärmetauscher, der einerseits von der Prozessluft und andererseits von Umgebungsluft durchströmt wird, wobei die Prozessluft und die Umgebungsluft vorzugsweise örtlich getrennt sind und sich nicht vermischen können. Es ist weiter ein Gebläse 7 vorgesehen, mit welchem die Umgebungsluft durch den Zusatzwärmetauscher 4 geführt wird, um diesen zu kühlen.The additional heat exchanger 4 is an air-to-air heat exchanger, which is traversed on the one hand by the process air and on the other hand by ambient air, wherein the process air and the ambient air are preferably spatially separated and can not mix. There is further provided a fan 7, with which the ambient air is passed through the additional heat exchanger 4 in order to cool it.

Die vom Zusatzwärmetauscher 4 dem Prozessluftkreislauf entzogene Wärmeleistung wird über die Drehzahl des Gebläses 7 festgelegt. Diese Drehzahl wird von einer Steuerung 8 des Geräts bestimmt, und zwar abhängig von mindestens einer Temperatur im Wärmepumpenkreislauf. Hierzu ist im Wärmepumpenkreislauf ein Temperatursensor 11 angeordnet. Die Steuerung ist dazu ausgestaltet, die Drehzahl des Gebläses 7 abhängig vom Signal des Temperatursensors 11 zu steuern, z.B. indem das Gebläse 7 mit grösserer Leistung betrieben wird, wenn die Temperatur ansteigt. Beispielsweise kann das Gebläse erst dann eingeschaltet werden, wenn die Temperatur einen vorgegebenen Schwellwert überschreitet. Vorzugsweise wird jedoch die Drehzahl des Gebläses 7 von der Steuerung 8 bei zunehmender Temperatur kontinuierlich oder zumindest in mehreren Schritten erhöht.The extracted from the additional heat exchanger 4 the process air circulation heat output is determined by the speed of the blower 7. This speed is determined by a controller 8 of the device, depending on at least one temperature in the heat pump cycle. For this purpose, a temperature sensor 11 is arranged in the heat pump cycle. The controller is designed to the speed of the fan 7 depending on the signal of the temperature sensor 11, for example by the fan 7 is operated at a higher power when the temperature rises. For example, the fan can be turned on only when the temperature exceeds a predetermined threshold. Preferably, however, the speed of the fan 7 is increased by the controller 8 with increasing temperature continuously or at least in several steps.

Die temperaturabhängige Ansteuerung des Gebläses 7 erlaubt es, z.B. beim Anfahren des Wäschetrockners dem Prozessluftkreislauf sehr schnell Energie zuzuführen, so dass die Prozesstemperatur rasch erreicht wird, wonach aber im Normalbetrieb ein Überhitzen des Wärmepumpenkreislaufs verhindert wird.The temperature-dependent control of the fan 7 allows, e.g. When starting the tumble dryer to supply the process air circuit very quickly energy, so that the process temperature is reached quickly, but then in normal operation overheating of the heat pump cycle is prevented.

Vorzugsweise wird die Temperatur des im Wärmepumpenkreislauf laufenden Mediums dort ermittelt, wo diese Temperatur ungefähr der Kondensationstemperatur des Mediums entspricht. Dies ist zwischen Kondensator 3 und Drosselorgan 5 der Fall, oder ausgangsseitig des Kondensators 3 oder eingangsseitig des Drosselorgans 5.Preferably, the temperature of the running medium in the heat pump cycle is determined where this temperature corresponds approximately to the condensation temperature of the medium. This is the case between capacitor 3 and throttle member 5, or the output side of the capacitor 3 or the input side of the throttle body. 5

Die vorliegende Erfindung kann unabhängig von dem im Wärmepumpenkreislauf eingesetzten Medium eingesetzt werden, z.B. bei einem Wärmepumpenkreislauf mit R134a oder bei einem solchen mit CO2.The present invention can be used independently of the medium used in the heat pump cycle, for example in a heat pump cycle with R134a or in one with CO 2 .

Die folgende Tabelle zeigt, im Sinne eines Beispiels, die Kühlluftmenge bzw. relative Förderleistung des Gebläses abhängig von der Temperatur T1 beim Temperatursensor 11, und zwar für eine Wärmepumpe mit dem Medium R134a: Temperatur T1 Kühlluftmenge 64 - 65°C 51% 65 - 66°C 72% 66 - 67°C 85% 67 - 68°C 93% 68 - 69°C 100% Ab einer Referenztemperatur T0 = 64 °C wird die Leistung des Gebläses 7 also erhöht. Für tiefere Temperaturen kann das Gebläse 7 abgeschaltet sein, oder es kann mit geringer Leistung betrieben werden. In der Tabelle ist die Kühlluftmenge in Prozent des Volumenstroms der geförderten Luftmenge relativ zur maximal vom Gebläse 7 förderbaren Luftmenge angegeben.The following table shows, in the sense of an example, the amount of cooling air or relative delivery of the blower depending on the temperature T1 at the temperature sensor 11, for a heat pump with the medium R134a: Temperature T1 Quantity of cooling air 64 - 65 ° C 51% 65 - 66 ° C 72% 66 - 67 ° C 85% 67 - 68 ° C 93% 68 - 69 ° C 100% From a reference temperature T0 = 64 ° C, the power of the fan 7 is thus increased. For lower temperatures, the blower 7 may be turned off, or it may be operated at low power. The table shows the amount of cooling air as a percentage of the volume flow of the delivered air volume relative to the maximum amount of air that can be conveyed by the fan 7.

Die obige Tabelle ist als Beispiel zu verstehen. Insbesondere können je nach maximaler Förderleistung des Gebläses 7, je nach Medium im Wärmepumpenkreislauf sowie abhängig von anderen Geräteparametern auch andere Werte verwendet werden. Die Abstufung kann auch gröber oder feiner sein, oder es kann eine kontinuierliche Abhängigkeit zwischen Förderleistung und Temperatur verwendet werden. Eine Abhängigkeit in mehreren Stufen oder eine kontinuierliche Abhängigkeit erlaubt eine feinere Regelung der Energieentnahme als eine "binäre" Ein-Aus-Regelung.The above table is to be understood as an example. Depending on the maximum delivery rate of the fan 7, depending on the medium in the heat pump cycle as well as on other device parameters, other values may be used in particular. The gradation may also be coarser or finer, or a continuous dependence between flow rate and temperature may be used. A multi-stage dependency or a continuous dependency allows a finer control of energy extraction than a "binary" on-off control.

Sinkt die Temperatur T1, so wird auch die Kühlluftmenge reduziert. Um ein zu schnelles Schalten zu vermeiden, erfolgen Stufenwechsel vorzugsweise jedoch nicht beliebig schnell, sondern z.B. höchstens einmal pro Minute.If the temperature T1 decreases, the amount of cooling air is also reduced. However, in order to avoid too fast switching, step changes are preferably not made arbitrarily fast, but e.g. at most once a minute.

Denkbar ist auch, die Leistung des Gebläses 7 abhängig von weiteren Temperaturen zu steuern, z.B. wie in Fig. 6 von EP 1 884 586 illustriert.It is also conceivable to control the power of the blower 7 as a function of further temperatures, for example as shown in FIG EP 1 884 586 illustrated.

Während in der vorliegenden Anmeldung bevorzugte Ausführungen der Erfindung beschrieben sind, ist klar darauf hinzuweisen, dass die Erfindung nicht auf diese beschränkt ist und in auch anderer Weise innerhalb des Umfangs der folgenden Ansprüche ausgeführt werden kann.While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited to these and may be practiced otherwise within the scope of the following claims.

Claims (5)

  1. Laundry dryer with
    a drum (1) for receiving laundry to be dried,
    a processing air circuit for feeding heated up processing air through said drum (1), for cooling the processing air in order to extract water and for heating up the processing air again,
    a heat pump circuit for feeding a fluid through a condenser (3), an expansion member (5), an evaporator (6) and a compressor (2) back to the condenser (3), where the condenser (3) heats up the processing air and the evaporator (6) cools down the processing air,
    a blower (7),
    wherein an additional heat exchanger (4) cooled by the blower (7) is provided,
    wherein the additional heat exchanger (4) is arranged in the processing air circuit and is adapted to extract heat from the processing air circuit, and wherein the blower (7) is adapted to blow environmental air onto the additional heat exchanger (4), and wherein the controller (8) is adapted to control a rotational speed of the blower (7) depending on the signal of a temperature sensor (11),
    wherein the temperature sensor (11) is arranged in the heat pump circuit and the laundry dryer comprises a controller (8) by means of which an amount of heat removed from the processing air circuit by means of the additional heat exchanger is controlled as a function of the signal of a temperature sensor (11),
    characterized in that precisely one additional heat exchanger (4) cooled by the blower (7) is provided.
  2. Laundry dryer according to claim 1, wherein the additional heat exchanger (4) is arranged between the drum (1) and the evaporator (6).
  3. Laundry dryer according to any of the preceding claims, wherein the temperature sensor (11) is arranged between the condenser (3) and the expansion member (5) or at an exit of the condenser (3) or at an input of the expansion member (5).
  4. Laundry dryer according to any of the preceding claims, wherein the controller (8) is adapted to control the rotational speed of the blower (7) with increasing temperature continuously or in several steps.
  5. Method for operating a laundry dryer according to any of the preceding claims, wherein the amount of heat removed from the processing air circuit by means of the additional heat exchanger (4) is controlled as a function of a signal of the temperature sensor (11).
EP11009967.8A 2010-12-24 2011-12-19 Clothes drier with temperature-controlled auxiliary heat exchanger Active EP2468949B1 (en)

Priority Applications (1)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH02171/10A CH701685B1 (en) 2010-12-24 2010-12-24 Clothes dryer with temperature-controlled additional heat exchanger.

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EP2468949A2 EP2468949A2 (en) 2012-06-27
EP2468949A3 EP2468949A3 (en) 2014-11-19
EP2468949B1 true EP2468949B1 (en) 2016-06-08

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CN (1) CN102560988A (en)
AU (1) AU2011265517A1 (en)
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DK (1) DK2468949T3 (en)
PL (1) PL2468949T3 (en)
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US10087569B2 (en) 2016-08-10 2018-10-02 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an appliance
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10718082B2 (en) 2017-08-11 2020-07-21 Whirlpool Corporation Acoustic heat exchanger treatment for a laundry appliance having a heat pump system

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DE102011078922A1 (en) * 2011-07-11 2013-01-17 BSH Bosch und Siemens Hausgeräte GmbH Exhaust air drying with additional heating and heat exchanger unit
DE102012216397A1 (en) * 2012-09-14 2014-03-20 BSH Bosch und Siemens Hausgeräte GmbH Condensation dryer with determination of the load and method for its operation
KR102009277B1 (en) * 2012-10-22 2019-08-09 엘지전자 주식회사 Clothes treating apparatus with a heat pump and operating method thereof
DE102012219975A1 (en) 2012-10-31 2014-04-30 BSH Bosch und Siemens Hausgeräte GmbH Clothes drying machine with heat pump
CN104342898A (en) * 2013-08-08 2015-02-11 海尔集团公司 Heat pump clothes dryer with auxiliary heating device and control method of heat pump clothes dryer
CN106455899B (en) 2014-06-02 2020-03-17 伊莱克斯电器股份公司 Household electrical appliance
KR101613962B1 (en) * 2014-11-20 2016-04-20 엘지전자 주식회사 Clothes treating apparatus with a heat pump system and control method for the same
CN104928901B (en) * 2015-05-15 2017-08-01 珠海格力电器股份有限公司 Heat pump clothes dryer and its control method and device
US10519591B2 (en) 2016-10-14 2019-12-31 Whirlpool Corporation Combination washing/drying laundry appliance having a heat pump system with reversible condensing and evaporating heat exchangers
US10738411B2 (en) 2016-10-14 2020-08-11 Whirlpool Corporation Filterless air-handling system for a heat pump laundry appliance
CN107101286B (en) * 2017-06-01 2022-09-30 广东申菱环境系统股份有限公司 Evaporative cooling and dehumidifying air conditioning unit and control method thereof
CN110878471B (en) * 2018-08-27 2022-07-19 合肥美的洗衣机有限公司 Control method and device of clothes treatment device and clothes treatment device
CN111623561A (en) * 2019-02-27 2020-09-04 青岛海尔滚筒洗衣机有限公司 Heat pump type clothes dryer heat pump system cooling method and heat pump type clothes dryer

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CH699018B9 (en) * 2006-01-27 2010-03-15 V Zug Ag Dryers with carbon dioxide heat pump.
DE102007002181B3 (en) * 2007-01-15 2008-08-21 BSH Bosch und Siemens Hausgeräte GmbH Condensation dryer with a heat pump
DE102007027866A1 (en) * 2007-06-18 2008-12-24 BSH Bosch und Siemens Hausgeräte GmbH Condensation dryer with a heat pump and method for its operation
DE102008040853A1 (en) * 2008-07-30 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Condensation dryer with a heat pump and detection of an impermissible operating state and method for its operation

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10087569B2 (en) 2016-08-10 2018-10-02 Whirlpool Corporation Maintenance free dryer having multiple self-cleaning lint filters
US10502478B2 (en) 2016-12-20 2019-12-10 Whirlpool Corporation Heat rejection system for a condenser of a refrigerant loop within an appliance
US10514194B2 (en) 2017-06-01 2019-12-24 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10823479B2 (en) 2017-06-01 2020-11-03 Whirlpool Corporation Multi-evaporator appliance having a multi-directional valve for delivering refrigerant to the evaporators
US10718082B2 (en) 2017-08-11 2020-07-21 Whirlpool Corporation Acoustic heat exchanger treatment for a laundry appliance having a heat pump system

Also Published As

Publication number Publication date
SI2468949T1 (en) 2016-10-28
CH701685A2 (en) 2011-02-28
AU2011265517A1 (en) 2012-07-12
EP2468949A3 (en) 2014-11-19
CN102560988A (en) 2012-07-11
CH701685B1 (en) 2018-12-14
PL2468949T3 (en) 2016-12-30
DK2468949T3 (en) 2016-09-12
EP2468949A2 (en) 2012-06-27

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