EP2407587B1 - Washer dryer with heat pump - Google Patents
Washer dryer with heat pump Download PDFInfo
- Publication number
- EP2407587B1 EP2407587B1 EP10401103A EP10401103A EP2407587B1 EP 2407587 B1 EP2407587 B1 EP 2407587B1 EP 10401103 A EP10401103 A EP 10401103A EP 10401103 A EP10401103 A EP 10401103A EP 2407587 B1 EP2407587 B1 EP 2407587B1
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- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- pipe portion
- condenser
- evaporator
- tumble dryer
- 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.)
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- 238000000034 method Methods 0.000 claims description 19
- 238000001035 drying Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims 9
- 230000005540 biological transmission Effects 0.000 claims 7
- 239000003507 refrigerant Substances 0.000 description 28
- 239000003570 air Substances 0.000 description 26
- 238000012546 transfer Methods 0.000 description 10
- 238000011161 development Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002918 waste heat Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013490 small scale run Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Images
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
- D06F58/206—Heat pump arrangements
Definitions
- the invention relates to a tumble dryer comprising a arranged in a housing, driven by a motor, rotatably mounted on a horizontal or inclined axis drum, a closed process air circuit in which supplied by means of a process air blower drying air via an air inlet of the drum, via an air outlet from this discharged, dehumidified in a heat exchanger and then reheated by a heater, a heat pump device with a refrigerant circuit in which circulates refrigerant in a piping system with an evaporator, a compressor, a condenser and a throttle, wherein the heat exchanger, the evaporator and the heating Condenser of the heat pump further comprising an inner heat exchanger, which is adapted to provide a heat transfer of a high-pressure line section to a pressurized line section line len.
- a heat pump dryer which additionally comprises an internal heat exchanger to completely vaporize liquid residues or pots in the vaporous refrigerant in the low-pressure line section.
- the EP 0 521 298 A2 discloses heat exchanger devices for compressed air systems in which heat is released from a refrigerant line to the air.
- the invention thus has the object to provide a tumble dryer with an efficient heat pump.
- the advantage achieved with the invention is that less so-called waste heat from the heat pump circuit must be removed, so that additional heat exchanger in the refrigerant circuit for cooling are no longer necessary. This requires the Refrigerant circuit less space, so that a particularly compact arrangement is possible here. Furthermore, by reducing the waste heat, the energy used for the drying process is used more efficiently, so that the dryer emits less heat into the installation room, which is particularly desirable in living spaces.
- the heat pump device in the refrigerant circuit comprises an inner heat exchanger, which is adapted to provide a heat transfer of a high-pressure line section to a pressurized line section.
- a line section can also be formed by the condenser itself.
- the internal heat exchanger causes the usable enthalpy difference between the pressure side of the compressor and the condenser heat exchanger to increase.
- the usable enthalpy difference between the throttle input and the compressor input increases. This makes the cold side colder and the warm side warmer, compared to a heat pump without an internal heat exchanger. This increases the effectiveness of the heat pump.
- the line sections forming the heat transfer are in direct contact, without an air gap being present between them.
- the inner heat exchanger is formed by providing a heat transfer from a line section between the condenser and the throttle to a line section between the evaporator and the compressor.
- the internal heat exchanger can be produced by providing heat transfer from a line section between the compressor and the condenser to a line section between the throttle and the evaporator.
- the inner heat exchanger consists of a wiring harness which comprises the high-pressure line section and the low-pressure line section.
- the tube forming the inner heat exchanger are summarized as a wiring harness.
- the wiring harness can then be shaped accordingly, as permitted by the space inside the device housing.
- the two line sections are looped around each other within the inner heat exchanger to provide a defined contact surface of the line walls are arranged for heat transfer.
- the pronounced contact surfaces improve the heat transfer from the warmer high-pressure line section to the colder low-pressure line section.
- the inner heat exchanger is formed in that the low-pressure line section extends within the high-pressure line section.
- the colder low-pressure line section is at least partially enclosed or flowed around by the warmer refrigerant.
- the low-pressure line section is arranged coaxially within the high-pressure line section.
- the cooler low-pressure line section which is colder than the high-pressure line section, is completely bypassed by the warmer refrigerant, so that an optimum heat transfer of the refrigerant is provided between these two line sections.
- the inner heat exchanger is designed as a spirally wound wiring harness.
- a long wiring harness with the high-pressure and low-pressure pipe sections contained therein can be accommodated quite compactly in a confined space.
- no abrupt deflections of the refrigerant take place here, so that the inner heat exchanger in this form forms a low flow resistance for the refrigerant.
- the inner heat exchanger is formed as a serpentine-shaped wiring harness.
- This design is particularly compact and small-scale run. Although this results in an increased flow resistance at the numerous deflections, but can be neglected at a slowed flow velocity of the resistance.
- the inner heat exchanger and / or the wiring harness is plate-shaped.
- This embodiment is particularly compact and easy to manufacture, since the hollow, plate-shaped component can be optimally formed on the available space within the dryer housing.
- the low-pressure line section is led to the line section of the condenser in heat-conducting contact to provide the inner heat exchanger. This eliminates the previously separately formed inner heat exchanger, which is now integrated in the compact block of the condenser.
- the heat-conductive contact is provided by means of ribs or fins, which are connected in heat-conducting manner with the line section in the condenser.
- the ribs or fins are already present in the condenser to increase the heat-superior surface to the process air flow, so that this embodiment is particularly easy to implement in a tumble dryer.
- fins or ribs for heat dissipation are attached to the wall of the high-pressure pipe section, whereby the surface of the outer pipe section is increased, thereby improving the heat release to the ambient air from the dryer housing out. This causes a so-called desuperheating of the refrigerant, since the refrigerant frequently heats up continuously during the drying process until excess heat has to be removed from the refrigerant circuit.
- the slats are arranged in blocks, which are provided with openings for the passage of the inner heat exchanger forming the wiring harness. This facilitates the manufacture of the internal heat exchanger.
- a prefabricated lamella block of pre-bent wiring harness is inserted into openings and then fixed so that a subsequent attachment of the slats is easily possible.
- the heat pump device with the aforementioned components, the engine and the process air blower in a compact functional module of the tumble dryer.
- the training has proven to be advantageous as a bottom-side functional module.
- the Fig. 1 shows in the perspective of a tumble dryer 1.
- the tumble dryer 1 in this case comprises a housing 2 in which a rotatably mounted drum 3 is arranged.
- the three figures each show the clothes dryer 1 in the closed situation.
- the functional module 5 which receives the components for the heat pump, the blower and the drive of the drum 3.
- the process air PL is generated by means of a blower and fed to the air inlet 6 of the drum 3.
- the drying air PL passes from the drum 3 in the bottom module 5, in which in a channel 8 of the heat exchanger 15 (FIG. Fig. 2 ) for cooling and condensation of the process air and the heater 16 ( Fig. 2 ) are arranged for heating the process air PL.
- Fig. 2 schematically shows the heat pump dryer with the circulation of the process air PL and the components of the heat pump.
- the channel 8 can be seen, in which the heat exchanger 15 and the radiator 16 are located, which are components of the heat pump.
- the line system 20 serves to connect the components of the heat pump.
- the air outlet 7 receives the moist, exhausted process air PL, wherein the fan 9, the flow of the process air PL provides.
- a motor 10 drives the fan 9 and provides the rotational movement of the drum 3 by means of a drum drive.
- the heat pump device comprises a refrigerant circuit in which refrigerant circulates in a line system 20 with an evaporator 15, a compressor 14, a condenser 16 and a throttle 15a, the heat exchanger 15 containing the evaporator 15 and the heater the condenser 16 of the heat pump.
- the line system 20 provides the refrigerant cycle starting from the pressure side of the compressor 14 to the condenser 16, starting from this starting point to the throttle 15a, then to the evaporator 15 and from there to the compressor 14 ready.
- the heat pump further comprises an internal heat exchanger 17 which is adapted to provide heat transfer of a high-pressure line section 18 between the condenser 16 and the throttle 15a to a low-pressure line section 19 between the evaporator 15 and the compressor 14.
- a blower 23 is arranged such that it can, if necessary, guide an air flow to the inner heat exchanger. As a result, excess heat is removed from the refrigerant circuit.
- Fig. 3 shows a section of the inner heat exchanger 17 as a helical wiring harness 24.
- the pipe section 24 includes an outer tube 18, since the high-pressure pipe section 18 forms.
- an inner tube 19 is coaxially arranged, which forms the low-pressure pipe section 19.
- individual fins 21 are mounted on the outside, which form an enlarged surface of the pipe wall and thereby cause improved heat dissipation to the environment.
- Fig. 4 shows the inner heat exchanger with a likewise helical wiring harness 24.
- the fins 21 are formed as a block having openings 22 through which the wiring harness 24 is passed in each case.
- Fig. 5 shows the inner heat exchanger in the embodiment with a serpentine-shaped wiring harness 24.
- This arrangement is particularly easy to manufacture, since in a manufacturing step lamellae 21 are punched and then can be applied to the tubing 24.
- As internal heat exchanger 17 and a plate heat exchanger can be used.
- Fig. 6 schematically shows the components of the heat pump with an inner heat exchanger 17 in another embodiment.
- the heat pump comprises an internal heat exchanger 17, which provides a heat transfer from the high-pressure line section, which in this case forms the line section of the condenser 16, to the line section 19, which supplies the refrigerant with low pressure.
- the heat exchanger 17 is here attached directly to the block of the condenser 16 or is part of this block, so that no separate component is necessary.
- a desuperheating heat exchanger 17a is arranged between condenser and throttle 15a, which is embodied here by way of example as a capillary tube, which can dissipate excess heat from the refrigerant in the pressurized line.
- the blower 23 provides, if necessary, for a cooling air flow.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Description
Die Erfindung betrifft einen Wäschetrockner, umfassend eine in einem Gehäuse angeordneten, mittels eines Motors antreibbaren, über eine horizontale oder geneigten Achse drehbar gelagerten Trommel, einen geschlossenen Prozessluftkreislauf, in dem mittels eines Prozessluftgebläses Trocknungsluft über einen Lufteinlass der Trommel zugeführt, über einen Luftauslass aus dieser abgeführt, in einem Wärmetauscher entfeuchtet und danach durch eine Heizung wieder erwärmt wird, einer Wärmepumpeneinrichtung mit einem Kältemittelkreislauf, bei dem Kältemittel in einem Leitungssystem mit einem Verdampfer, einem Kompressor, einem Verflüssiger und einer Drossel zirkuliert, wobei der Wärmetauscher den Verdampfer und die Heizung den Verflüssiger der Wärmepumpe enthält, ferner umfassend einen inneren Wärmetauscher, der dazu eingerichtet ist, einen Wärmeübergang eines mit Hochdruck beaufschlagten Leitungsabschnitts zu einem mit Niederdruck beaufschlagten Leitungsabschnitt bereitzustellen.The invention relates to a tumble dryer comprising a arranged in a housing, driven by a motor, rotatably mounted on a horizontal or inclined axis drum, a closed process air circuit in which supplied by means of a process air blower drying air via an air inlet of the drum, via an air outlet from this discharged, dehumidified in a heat exchanger and then reheated by a heater, a heat pump device with a refrigerant circuit in which circulates refrigerant in a piping system with an evaporator, a compressor, a condenser and a throttle, wherein the heat exchanger, the evaporator and the heating Condenser of the heat pump further comprising an inner heat exchanger, which is adapted to provide a heat transfer of a high-pressure line section to a pressurized line section line len.
Aus dem Stand der Technik ist gemäß der
Aus der
Eine andere Möglichkeit ist aus der
Die
Bei den bekannten Wärmepumpen wird Energie ungenutzt nach außen abgeführt, die nicht für den Trocknungsprozess zur Verfügung steht.In the known heat pumps energy is dissipated unused to the outside, which is not available for the drying process.
Der Erfindung stellt sich somit die Aufgabe, einen Wäschetrockner mit einer effizienten Wärmepumpe bereitzustellen.The invention thus has the object to provide a tumble dryer with an efficient heat pump.
Erfindungsgemäß wird diese Aufgabe durch einen Wäschetrockner mit den Merkmalen des unabhängigen Anspruchs 1, 2 oder 10 gelöst. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den jeweils nachfolgenden abhängigen Ansprüchen.According to the invention this object is achieved by a tumble dryer with the features of the
Der mit der Erfindung erreichte Vorteil besteht darin, dass weniger sogenannte Abwärme aus dem Wärmepumpenkreis abgeführt werden muss, sodass zusätzliche Wärmetauscher im Kältemittelkreislauf zur Kühlung nicht mehr notwendig sind. Dadurch benötigt der Kältemittelkreislauf weniger Bauraum, sodass hier eine besonders kompakte Anordnung ermöglicht wird. Ferner wird durch die Verringerung der Abwärme die eingesetzte Energie für den Trocknungsprozess effizienter genutzt, so dass der Trockner weniger Wärme in den Aufstellraum abgibt, was besonders in Wohnräumen erwünscht ist.The advantage achieved with the invention is that less so-called waste heat from the heat pump circuit must be removed, so that additional heat exchanger in the refrigerant circuit for cooling are no longer necessary. This requires the Refrigerant circuit less space, so that a particularly compact arrangement is possible here. Furthermore, by reducing the waste heat, the energy used for the drying process is used more efficiently, so that the dryer emits less heat into the installation room, which is particularly desirable in living spaces.
Gemäß der Erfindung umfasst die Wärmepumpeneinrichtung im Kältemittelkreislauf einen inneren Wärmetauscher, der dazu eingerichtet ist, einen Wärmeübergang eines mit Hochdruck beaufschlagten Leitungsabschnitts zu einem mit Niederdruck beaufschlagten Leitungsabschnitt bereitzustellen. Als Leitungabschnitt kann auch vom Verflüssiger selbst gebildet sein. Der innere Wärmetauscher bewirkt, dass die nutzbare Enthalphiedifferenz zwischen Druckseite des Kompressors und dem als Heizung wirkenden Wärmetauscher des Verflüssigers größer wird. Ferner wird auch die nutzbare Enthalphiedifferenz zwischen dem Drosseleingang und dem Kompressoreingang größer. Dadurch wird die kalte Seite kälter und die warme Seite wärmer, gegenüber einer Wärmepumpe ohne inneren Wärmetauscher. Dadurch wird die Effektivität der Wärmepumpe gesteigert. Die den Wärmeübergang bildenden Leitungsabschnitte stehen hierbei in direktem Kontakt, ohne dass eine Luftstrecke dazwischen vorhanden ist.According to the invention, the heat pump device in the refrigerant circuit comprises an inner heat exchanger, which is adapted to provide a heat transfer of a high-pressure line section to a pressurized line section. As a line section can also be formed by the condenser itself. The internal heat exchanger causes the usable enthalpy difference between the pressure side of the compressor and the condenser heat exchanger to increase. Furthermore, the usable enthalpy difference between the throttle input and the compressor input increases. This makes the cold side colder and the warm side warmer, compared to a heat pump without an internal heat exchanger. This increases the effectiveness of the heat pump. In this case, the line sections forming the heat transfer are in direct contact, without an air gap being present between them.
Hierbei ist es zweckmäßig, dass der innere Wärmetauscher dadurch gebildet ist, einen Wärmeübergang von einem Leitungsabschnitt zwischen dem Verflüssiger und der Drossel zu einem Leitungsabschnitt zwischen Verdampfer und Kompressor bereitzustellen. Alternativ kann der innere Wärmetauscher dadurch erzeugt werden, dass ein Wärmeübergang von einem Leitungsabschnitt zwischen dem Kompressor und dem Verflüssiger zu einem Leitungsabschnitt zwischen Drossel und Verdampfer bereitgestellt wird.Here, it is expedient that the inner heat exchanger is formed by providing a heat transfer from a line section between the condenser and the throttle to a line section between the evaporator and the compressor. Alternatively, the internal heat exchanger can be produced by providing heat transfer from a line section between the compressor and the condenser to a line section between the throttle and the evaporator.
Gemäß der Erfindung besteht der innere Wärmetauscher aus einem Leitungsstrang, der den mit Hochdruck beaufschlagten Leitungsabschnitt und den mit Niederdruck beaufschlagten Leitungsabschnitt umfasst. Somit sind die den inneren Wärmetauscher bildenden Rohrabschnitte als ein Leitungsstrang zusammengefasst. Der Leitungsstrang kann dann entsprechend geformt werden, wie es der Bauraum innerhalb des Gerätegehäuses zulässt.According to the invention, the inner heat exchanger consists of a wiring harness which comprises the high-pressure line section and the low-pressure line section. Thus, the tube forming the inner heat exchanger are summarized as a wiring harness. The wiring harness can then be shaped accordingly, as permitted by the space inside the device housing.
In einer vorteilhaften Weiterbildung sind innerhalb des inneren Wärmetauschers die beiden Leitungsabschnitte umeinander umschlungen zur Bereitstellung einer definierten Berührfläche der Leitungswände zur Wärmeübertragung angeordnet sind. Durch die ausgeprägten Berührflächen wird der Wärmeübergang vom wärmeren Hochdruck-Leitungsabschnitt zum kälteren Niederdruck-Leitungsabschnitt verbessert.In an advantageous development, the two line sections are looped around each other within the inner heat exchanger to provide a defined contact surface of the line walls are arranged for heat transfer. The pronounced contact surfaces improve the heat transfer from the warmer high-pressure line section to the colder low-pressure line section.
In einer weiteren, vorteilhaften Ausführung ist der innere Wärmetauscher dadurch gebildet, dass der Niederdruck- Leitungsabschnitt innerhalb des Hochdruck-Leitungsabschnitts verläuft. Somit wird der kältere Niederdruck-Leitungsabschnitt zumindest teilweise vom wärmeren Kältemittel umschlossen bzw. umströmt.In a further advantageous embodiment, the inner heat exchanger is formed in that the low-pressure line section extends within the high-pressure line section. Thus, the colder low-pressure line section is at least partially enclosed or flowed around by the warmer refrigerant.
In einer vorteilhaften Weiterbildung ist der Niederdruck-Leitungsabschnitt koaxial innerhalb des Hochdruck-Leitungsabschnitts angeordnet. Dadurch wird der gegenüber dem Hochdruck-Leitungsabschnitt kältere Niederdruck-Leitungsabschnitt vollständig vom wärmeren Kältemittel umströmt, sodass ein optimaler Wärmeübergang des Kältemittels zwischen diesen beiden Leitungsabschnitten bereitgestellt wird.In an advantageous development, the low-pressure line section is arranged coaxially within the high-pressure line section. As a result, the cooler low-pressure line section, which is colder than the high-pressure line section, is completely bypassed by the warmer refrigerant, so that an optimum heat transfer of the refrigerant is provided between these two line sections.
In einer zweckmäßigen Ausführung ist der innere Wärmetauscher als spiralförmig gewendelter Leitungsstrang ausgebildet. Dadurch kann auf engem Raum ein langer Leitungsstrang mit den darin umfassenden Hochdruck- und Niederdruck-Rohrabschnitt recht kompakt untergebracht werden. Ferner finden hier keine abrupten Umlenkungen des Kältemittels statt, sodass der innere Wärmetauscher in dieser Form einen geringen Strömungswiderstand für das Kältemittel bildet.In an expedient embodiment, the inner heat exchanger is designed as a spirally wound wiring harness. As a result, a long wiring harness with the high-pressure and low-pressure pipe sections contained therein can be accommodated quite compactly in a confined space. Furthermore, no abrupt deflections of the refrigerant take place here, so that the inner heat exchanger in this form forms a low flow resistance for the refrigerant.
In einer anderen Ausführung ist der innere Wärmetauscher als schlangenlinienförmig geformter Leitungsstrang ausgebildet. Diese Ausführung ist besonders kompakt und kleinbauend auszuführen. Hierbei tritt zwar ein erhöhter Strömungswiderstand an den zahlreichen Umlenkungen auf, jedoch kann bei einer verlangsamten Strömungsgeschwindigkeit der Widerstand vernachlässigt werden. Auch eine Vergrößerung der Rohrquerschnitte, gegenüber den Rohrabschnitten einer spiralförmigen Anordnung, bewirkt eine Verlangsamung der Strömung.In another embodiment, the inner heat exchanger is formed as a serpentine-shaped wiring harness. This design is particularly compact and small-scale run. Although this results in an increased flow resistance at the numerous deflections, but can be neglected at a slowed flow velocity of the resistance. An enlargement of the pipe cross sections, compared to the pipe sections of a spiral arrangement, causes a slowing down of the flow.
Alternativ ist der innere Wärmetauscher und / oder der Leitungsstrang plattenförmig ausgebildet. Diese Ausführung ist besonders kompakt ausgebildet und einfach herzustellen, da das hohle, plattenförmige Bauteil auf den zur Verfügung stehenden Raum innerhalb des Trocknergehäuses optimal geformt werden kann.Alternatively, the inner heat exchanger and / or the wiring harness is plate-shaped. This embodiment is particularly compact and easy to manufacture, since the hollow, plate-shaped component can be optimally formed on the available space within the dryer housing.
In einer anderen Ausführung ist zur Bereitstellung des inneren Wärmetauschers der mit Niederdruck beaufschlagte Leitungsabschnitt mit dem Leitungsabschnitt des Verflüssigers in wärmeleitendem Kontakt geführt. Dadurch entfällt der bisher separat ausgebildete innere Wärmetauscher, der nun in dem kompakten Block des Verflüssigers integriert ist.In another embodiment, the low-pressure line section is led to the line section of the condenser in heat-conducting contact to provide the inner heat exchanger. This eliminates the previously separately formed inner heat exchanger, which is now integrated in the compact block of the condenser.
In einer zweckmäßigen Weiterbildung wird der wärmeleitende Kontakt mittels Rippen oder Lamellen bereitgestellt, die mit dem Leitungsabschnitt im Verflüssiger wärmeleitend verbunden sind. Die Rippen oder Lamellen sind zur Vergrößerung der wärmeübertagneden Oberfläche zum Prozessluftstrom ohnehin im Verflüssiger vorhanden, so dass diese Ausführung besonders einfach in einem Wäschetrockner umzusetzen ist.In an expedient development of the heat-conductive contact is provided by means of ribs or fins, which are connected in heat-conducting manner with the line section in the condenser. The ribs or fins are already present in the condenser to increase the heat-superior surface to the process air flow, so that this embodiment is particularly easy to implement in a tumble dryer.
In einer weiteren, vorteilhaften Ausführung sind an der Wandung des Hochdruck-Leitungsabschnitts Lamellen oder Rippen zur Wärmeabführung angebracht, wodurch die Oberfläche des äußeren Rohrabschnitts vergrößert wird, um dadurch die Wärmeabgabe an die Umgebungsluft aus dem Trocknergehäuse heraus zu verbessern. Dadurch wird eine sogenannte Enthitzung des Kältemittels bewirkt, da sich beim Trocknungsprozess häufig das Kältemittel stetig erwärmt, bis überschüssige Wärme aus dem Kältemittelkreislauf abgeführt werden muss.In a further advantageous embodiment, fins or ribs for heat dissipation are attached to the wall of the high-pressure pipe section, whereby the surface of the outer pipe section is increased, thereby improving the heat release to the ambient air from the dryer housing out. This causes a so-called desuperheating of the refrigerant, since the refrigerant frequently heats up continuously during the drying process until excess heat has to be removed from the refrigerant circuit.
In einer zweckmäßigen Weiterbildung sind die Lamellen blockweise angeordnet, die mit Öffnungen zur Durchführung des den inneren Wärmetauscher bildenden Leitungsstrangs versehen sind. Dadurch wird die Fertigung des inneren Wärmetauschers erleichtert. In einen vorgefertigten Lamellenblock wird der bereits vorgebogene Leitungsstrang in Öffnungen eingelegt und anschließend fixiert, sodass auch eine nachträgliche Anbringung der Lamellen einfach möglich ist.In an expedient development, the slats are arranged in blocks, which are provided with openings for the passage of the inner heat exchanger forming the wiring harness. This facilitates the manufacture of the internal heat exchanger. In a prefabricated lamella block of pre-bent wiring harness is inserted into openings and then fixed so that a subsequent attachment of the slats is easily possible.
Um die Wärme gezielt abzuführen, ist es vorteilhaft, im Wirkbereich des inneren Wärmetauschers ein Gebläse zur Erzeugung eines Kühlluftstroms vorzusehen, der dazu eingerichtet ist, Wärme von dem inneren Wärmetauscher bildenden Leitungsstrang abzuführen.In order to dissipate the heat in a targeted manner, it is advantageous to provide, in the effective region of the inner heat exchanger, a blower for generating a cooling air flow, which is set up to dissipate heat from the inner heat exchanger forming wiring harness.
Insgesamt ist es zweckmäßig, die Wärmepumpeneinrichtung mit den vorgenannten Komponenten, den Motor und das Prozessluftgebläse in einem kompakten Funktionsmodul des Wäschetrockners anzuordnen. Hierbei hat sich die Ausbildung als bodenseitiges Funktionsmodul als vorteilhaft erwiesen.Overall, it is expedient to arrange the heat pump device with the aforementioned components, the engine and the process air blower in a compact functional module of the tumble dryer. Here, the training has proven to be advantageous as a bottom-side functional module.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen rein schematisch dargestellt und wird nachfolgend näher beschrieben. Es zeigt:
- Fig. 1:
- eine perspektivische Darstellung eines Wäschetrockners;
- Fig. 2:
- eine schematische Darstellung der Komponenten der Wärmepumpe;
- Fig. 3 bis 5:
- den inneren Wärmetauscher und
- Fig. 6:
- eine schematische Darstellung der Komponenten der Wärmepumpe in einer Ausführungsform.
- Fig. 1:
- a perspective view of a clothes dryer;
- Fig. 2:
- a schematic representation of the components of the heat pump;
- 3 to 5:
- the inner heat exchanger and
- Fig. 6:
- a schematic representation of the components of the heat pump in one embodiment.
Die
In
Da das Kältemittel auf der Ansaugseite des Kompressors 14 gasförmig sein muss, um den Prozess und den Kompressorbetrieb sicherzustellen, wird durch die zusätzliche Erwärmung des Kältemittels vor dem Kompressor 14 eine zuverlässige Verdampfung noch vorhandener flüssiger Bestandteile des Kältemittels erreicht. Dieser Effekt wird mit allen genannten Ausführungen erreicht. Als Kätemittel sind die bekannten Mittel R134a oder R407c aber auch R744 (Kohlendioxid) geeignet. Andere Kältemittel, die ähnliches oder anderes Siede- und Kondensationsverhalten haben, können ebenfalls verwendet werden.Since the refrigerant on the suction side of the
Claims (14)
- Tumble dryer (1), comprising a drum (3) which is arranged in a housing (2), can be driven by means of a motor (10) and is rotatably mounted via a horizontal or inclined axle, a closed process air circuit (PL) in which drying air is supplied, by means of a process air fan (9), to the drum (3) via an air inlet (6), carried away therefrom via an air outlet (7), dehumidified in a heat exchanger (15) and then reheated by a heater (16), a heat pump device having a cooling agent circuit in which cooling agent circulates in a pipe system comprising an evaporator (15), a compressor (14), a condenser (16) and a throttle (15a), the heat exchanger containing the evaporator (15) and the heater containing the condenser (16) of the heat pump, further comprising a pipe system (20) which provides the cooling agent circuit from the pressure side of the compressor (14) to the condenser (16), from the condenser to the throttle (15a), then to the evaporator (15) and from the evaporator to the compressor (14), further comprising an internal heat exchanger (17) which is arranged to provide heat transmission from a pipe portion (18) charged with high pressure to a pipe portion (19) charged with low pressure,
characterised in that
the internal heat exchanger (17) consists of a pipeline (24) which comprises the pipe portion (18) charged with high pressure and the pipe portion (19) charged with low pressure, and in that the pipe portions forming the heat transmission are in direct contact. - Tumble dryer (1), comprising a drum (3) which is arranged in a housing (2), can be driven by means of a motor (10) and is rotatably mounted via a horizontal or inclined axle, a closed process air circuit (PL) in which drying air is supplied, by means of a process air fan (9), to the drum (3) via an air inlet (6), carried away therefrom via an air outlet (7), dehumidified in a heat exchanger (15) and then reheated by a heater (16), a heat pump device having a cooling agent circuit in which cooling agent circulates in a pipe system comprising an evaporator (15), a compressor (14), a condenser (16) and a throttle (15a), the heat exchanger containing the evaporator (15) and the heater containing the condenser (16) of the heat pump, further comprising a pipe system (20), which provides the cooling agent circuit from the pressure side of the compressor (14) to the condenser (16), from the condenser to the throttle (15a), then to the evaporator (15) and from the evaporator to the compressor (14), further comprising an internal heat exchanger (17) which is arranged to provide heat transmission from a pipe portion (18) charged with high pressure to a pipe portion (19) charged with low pressure,
characterised in that
the internal heat exchanger (17) consists of a pipeline (24) which comprises the pipe portion (18) charged with high pressure and the pipe portion (19) charged with low pressure, and in that the pipeline (24) is formed in that the low-pressure pipe portion (19) extends inside the high-pressure pipe portion (18). - Tumble dryer (1) according to either claim 1 or claim 2,
characterised in that
the internal heat exchanger (17) is arranged to provide heat transmission from a pipe portion (18) between the condenser (16) and the throttle (15a) to a pipe portion between the evaporator (15) and the compressor (14). - Tumble dryer (1) according to either claim 1 or claim 2,
characterised in that
the internal heat exchanger (17) is arranged to provide heat transmission from a pipe portion (18a) between the compressor (14) and the condenser (16) to a pipe portion between the throttle (15a) and the evaporator (15). - Tumble dryer (1) according to claim 1,
characterised in that
the two pipe portions (18, 19) wrap around each other in the pipeline (24) to provide a defined contact surface of the pipe walls for heat transmission. - Tumble dryer (1) according to claim 2
characterised in that
the low-pressure pipe portion (19) is arranged coaxially inside the high-pressure pipe portion (18). - Tumble dryer (1) according to either claim 1 or claim 2,
characterised in that
the pipeline (24) is coiled in a spiral to provide the internal heat exchanger (17). - Tumble dryer (1) according to either claim 1 or claim 2,
characterised in that
the pipeline (24) is undulated or looped to provide the internal heat exchanger (17). - Tumble dryer (1) according to either claim 1 or claim 2,
characterised in that
the internal heat exchanger (17) and/or the pipeline (24) is plate-shaped. - Tumble dryer (1), comprising a drum (3) which is arranged in a housing (2), can be driven by means of a motor (10) and is rotatably mounted via a horizontal or inclined axle, a closed process air circuit (PL) in which drying air is supplied, by means of a process air fan (9), to the drum (3) via an air inlet (6), carried away therefrom via an air outlet (7), dehumidified in a heat exchanger (15) and then reheated by a heater (16), a heat pump device having a cooling agent circuit in which cooling agent circulates in a pipe system comprising an evaporator (15), a compressor (14), a condenser (16) and a throttle (15a), the heat exchanger containing the evaporator (15) and the heater containing the condenser (16) of the heat pump, further comprising a pipe system (20), which provides the cooling agent circuit from the pressure side of the compressor (14) to the condenser (16), from the condenser to the throttle (15a), then to the evaporator (15) and from the evaporator to the compressor (14), further comprising an internal heat exchanger (17) which is arranged to provide heat transmission from a pipe portion (18) charged with high pressure to a pipe portion (19) charged with low pressure,
characterised in that
the pipe portion charged with low pressure (19) is guided in heat-conducting contact with the condenser (16) to provide the internal heat exchanger (17). - Tumble dryer (1) according to claim 10,
characterised in that
the heat-conducting contact is provided by means of ribs or fins which are connected to the pipe portion in the condenser in a heat-conducting manner. - Tumble dryer (1) according to any of claims 1 to 10,
characterised in that
on the high-pressure pipe portion (18), the outside of the pipeline (24) comprises fins (21) for the removal of heat. - Tumble dryer (1) according to claim 12,
characterised in that
the fins (21) are arranged as blocks (21 a) which are provided with openings (22) for the passage of the pipeline (24) which forms the internal heat exchanger (17). - Tumble dryer (1) according to any of claims 1 to 13,
characterised by
a fan (23) for producing a cooling air stream which is arranged to remove heat from the pipeline (24) and/or the internal heat exchanger (17).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES10401103T ES2394785T3 (en) | 2010-07-16 | 2010-07-16 | Clothes dryer with heat pump |
PL10401103T PL2407587T3 (en) | 2010-07-16 | 2010-07-16 | Washer dryer with heat pump |
SI201030093T SI2407587T1 (en) | 2010-07-16 | 2010-07-16 | Washer dryer with heat pump |
EP10401103.6A EP2407587B2 (en) | 2010-07-16 | 2010-07-16 | Washer dryer with heat pump |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10401103.6A EP2407587B2 (en) | 2010-07-16 | 2010-07-16 | Washer dryer with heat pump |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2407587A1 EP2407587A1 (en) | 2012-01-18 |
EP2407587B1 true EP2407587B1 (en) | 2012-10-31 |
EP2407587B2 EP2407587B2 (en) | 2018-01-10 |
Family
ID=43259857
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10401103.6A Active EP2407587B2 (en) | 2010-07-16 | 2010-07-16 | Washer dryer with heat pump |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2407587B2 (en) |
ES (1) | ES2394785T3 (en) |
PL (1) | PL2407587T3 (en) |
SI (1) | SI2407587T1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102014002471A1 (en) * | 2013-06-24 | 2014-12-24 | Diehl Ako Stiftung & Co. Kg | Electronic household appliance with heat pump |
EP2980305B1 (en) | 2014-08-01 | 2017-01-25 | Miele & Cie. KG | Household appliance such as a laundry dryer, a laundry washing-drying machine, a laundry washing maschine, a dishwasher having a heat pump unit |
DE102014013045A1 (en) | 2014-09-03 | 2016-03-03 | Detlef Görgens | Clothes dryer or washing machine with laundry drying device with heat pump device, in which parts of the machines consist of mineral cast iron. |
KR20180014615A (en) * | 2016-08-01 | 2018-02-09 | 엘지전자 주식회사 | Clothes treatment apparatus |
CN109668218B (en) * | 2018-11-28 | 2024-05-07 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioning equipment with same |
EP4086538A1 (en) * | 2021-05-03 | 2022-11-09 | BSH Hausgeräte GmbH | Compressor module having means for cooling and household appliance including such |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE9204952U1 (en) | 1991-06-04 | 1992-07-16 | Autokühler GmbH & Co KG, 3520 Hofgeismar | Heat exchangers, especially for condensation dryers |
DE4422191A1 (en) | 1993-07-14 | 1995-01-19 | Miele & Cie | Drying appliance, especially condensation-type laundry dryer, with a heat-pump device |
JPH0838795A (en) † | 1994-08-01 | 1996-02-13 | Hitachi Ltd | Drying device |
ITPN20000070A1 (en) | 2000-11-20 | 2002-05-20 | Electrolux Zanussi Elettrodome | HEAT PUMP DRYER |
JP2005253588A (en) | 2004-03-10 | 2005-09-22 | Sanyo Electric Co Ltd | Drier |
JP5422881B2 (en) † | 2007-09-27 | 2014-02-19 | パナソニック株式会社 | Dehumidifier |
EP1983095B1 (en) * | 2008-08-08 | 2012-09-05 | V-Zug AG | Laundry drier with a heating in the heat pump circuit |
JP2010104579A (en) † | 2008-10-30 | 2010-05-13 | Toshiba Corp | Washing machine |
EP2385169A1 (en) † | 2010-05-03 | 2011-11-09 | Electrolux Home Products Corporation N.V. | A laundry machine with heat pump system and a method for operating the laundry machine |
-
2010
- 2010-07-16 SI SI201030093T patent/SI2407587T1/en unknown
- 2010-07-16 PL PL10401103T patent/PL2407587T3/en unknown
- 2010-07-16 EP EP10401103.6A patent/EP2407587B2/en active Active
- 2010-07-16 ES ES10401103T patent/ES2394785T3/en active Active
Also Published As
Publication number | Publication date |
---|---|
SI2407587T1 (en) | 2013-01-31 |
EP2407587A1 (en) | 2012-01-18 |
ES2394785T3 (en) | 2013-02-05 |
EP2407587B2 (en) | 2018-01-10 |
PL2407587T3 (en) | 2013-03-29 |
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