EP2024552B1 - Condensation dryer having a process-air coil, and method for drying in a condensation dryer of this type - Google Patents

Condensation dryer having a process-air coil, and method for drying in a condensation dryer of this type Download PDF

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Publication number
EP2024552B1
EP2024552B1 EP07727968A EP07727968A EP2024552B1 EP 2024552 B1 EP2024552 B1 EP 2024552B1 EP 07727968 A EP07727968 A EP 07727968A EP 07727968 A EP07727968 A EP 07727968A EP 2024552 B1 EP2024552 B1 EP 2024552B1
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EP
European Patent Office
Prior art keywords
process air
fan
collecting vessel
water
drying chamber
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EP07727968A
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German (de)
French (fr)
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EP2024552A1 (en
Inventor
Oliver Despang
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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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
    • 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 
    • D06F58/24—Condensing arrangements

Definitions

  • the invention relates to a condensation dryer having a drying chamber and a process air circuit for circulating process air through the drying chamber, the process air circuit from the drying chamber first to a condenser for cooling the process air, separating water from the process air and collecting the water in a first receiver, thereafter to a first fan for driving the process air, then to a heater for heating the process air and then back to the drying chamber, and wherein the first fan has a rotor and a stator formed as a process air spiral.
  • the invention relates to a method for drying laundry in such a condensation dryer.
  • condensation dryer in which a fan has blades over which forms a pressure gradient during operation.
  • the fan is positioned to deliver moisture-saturated air so that further condensation of moisture occurs in the areas on the vanes where the pressure is relatively low.
  • the resulting in the housing of the blower condensate can be fed through a corresponding outlet to a condensate collector.
  • a condensation dryer In a condensation dryer (condensation dryer) work generally a closed hot air circuit (process air circuit) and an open cooling air flow.
  • process air circuit process air circuit
  • the laundry to be dried In the hot air circulation, the laundry to be dried is heated by means of flowing process air, the water being absorbed and transported to a heat exchanger (condenser). There, the water contained in the process air condenses due to cooling with the cooling air and is separated from the process air and collected in a condensate tank.
  • the dehumidified process air is reheated by a heating unit and then passed through the laundry to be dried again.
  • a condensation dryer In a condensation dryer is located in the In general, a process air blower, in the lower part of which the water removed from the wet laundry accumulates. This is especially true when the condensation dryer is at a standstill.
  • the lower part of the process air blower by design, is generally lower than the condensate tank used to catch the water from the process air used to dry the wet
  • a blower in a spiral housing, in particular for use in a condensation dryer is apparent from the EP 1 046 822 B1 , of the EP 0 702 105 B1 or the U.S. Patent 5,915,922 , A condenser for a condenser dryer is described in U.S. Patent No. 5,376,866 EP 1 050 618 B1 ,
  • the object of the invention is therefore to provide a condensation dryer and a method in which the water accumulating in the process air blower can be removed and, in particular, transferred to a condensate container for disposal by an operator.
  • the condensation dryer according to the invention with a drying chamber and a process air circuit for circulating process air through the drying chamber, wherein the process air circuit from the drying chamber first to a condenser for cooling the process air, separating water from the process air and collecting the water in a first collecting vessel, then to a first blower for driving the process air, then to a heater for heating the process air and then back to the drying chamber, and wherein the first blower has a rotor and a stator formed as a process air spiral, characterized in that between the process air spiral and the first collecting vessel a guide arrangement is formed, through which water from the fan can be transported by means of an adjusting between the condenser and the fan pressure difference in the first collecting vessel.
  • the inventive method for drying laundry with such a condensation dryer is characterized by water, which collects in the process air spiral, formed by the between the process air coil and the first collecting vessel guide assembly by means of an adjusting between the condenser and the fan pressure difference in the first Collecting vessel is transported.
  • a condensation dryer in which the guide arrangement has an opening in the process air spiral, a second one communicating with the fan via the latter Collecting vessel, in which water from the process air spiral can drip, and a communicating with the second receptacle and the first receptacle pipe socket comprises.
  • water that enters the process air spiral drip easily into the second receptacle, so that the process air coil can be kept largely dry.
  • the second receptacle is brought through a pipe socket in the necessary communication with the first receptacle, so that a structurally possibly required height difference between the process air coil and the condenser or communicating with this first receptacle can be bridged, taking advantage of a pressure difference between suction and Pressure side of the blower.
  • a condensation dryer is preferred in which the opening is located at the vertically lowest point of the process air spiral.
  • the condensation dryer according to the invention may be a dryer with or without a heat pump cycle.
  • condensation dryer in which the first blower is a centrifugal blower.
  • a particularly preferred condensation dryer is characterized in that the first collecting vessel communicates with a condensate container above it for collecting the water.
  • a condensate container In such a condensate container, collected condensate including the water carried from the process air coil can be easily provided for disposal by an operator.
  • a likewise particularly preferred condensation dryer has an open or closed cooling air duct, through which the condenser can be supplied by means of a second blower cooling air from an environment of the condensation dryer and led out after cooling the process air from the condensation dryer.
  • At standstill of the condensation dryer i. at standstill of the stator or fan wheel in the first fan, prevails in the lower region or at the lowest point of the process air coil atmospheric pressure.
  • the fan in the fan in the flow direction of the process air in front of the blower (fan wheel) is a negative pressure, while behind there is an overpressure.
  • the invention has numerous advantages. So there is no condensate in the process air spiral.
  • the condensate water does not collect in the process air spiral, but is collected centrally, and can be easily and regularly disposed of.
  • the condensation dryer 1 has a drying chamber 2, in which the material to be dried, generally laundry, is filled.
  • the drying chamber 2 can be driven by a motor, not shown.
  • a first blower 7 By means of a first blower 7, the drying chamber 2 is supplied with the process air heated by means of a heater 13 in the direction of the arrow.
  • the air fed to the condensation dryer 1 is conducted in a closed process air circuit 3, 4, 5.
  • the process air enriched with moisture flows into the condenser 10, where the moisture is condensed in the condenser 10 as a function of the cooling and collected in a first collecting vessel 11.
  • the process air dried in this way is then passed through the first fan 7 through a heater 13 and heated. Subsequently, the heated process air is fed back into the drying chamber 2, whereby the cycle of the process air is closed.
  • the first collecting vessel 11 is located in the vicinity of the condenser 10 and thus at a location that is quite low and difficult to access for a non-expert operator. In order to make the disposal of condensed water possible for such an operator, the water from the first receptacle 11 is pumped into a more accessible condensate tank 14; a designated pump is not shown for clarity.
  • the condensate tank 14 can be easily emptied after each use of the condensation dryer 1.
  • the location of the process air coil 20 is shown in the schematic drawing of FIG. 1 only hinted.
  • a second collecting vessel 12 which is connected via a pipe socket 19 with the overlying first collecting vessel 11.
  • the first blower 7 and the second blower 8 which conveys cooling air for the condenser 10 are driven by a common motor located in a drive unit 6.
  • the drive of the two fans 7 and 8 can also be done separately.
  • the process air circuit 3, 4, 5 need not necessarily be closed; if necessary, it is possible to change between an open and a closed process air circuit 3, 4, 5 by means of a suitable system of flaps or the like. In FIG. 1 the process air cycle is closed for the sake of simplicity.
  • the condensation dryer 1 according to FIG. 1 has an open cooling air channel 9, in which a cooling air flow from the cooling air inlet 15 is conveyed to the cooling air outlet 16. According to the invention, however, a closed cooling air flow circuit is possible, or the condenser 10 and the heater 13 may be components of a heat pump.
  • FIG. 2 shows the area in the condensation dryer in which the process air coil 20 is located (in section 4 of the process air cycle).
  • the process air entering in the arrow direction in section 4 of the process air cycle is conveyed by means of a first blower 7, 20 with rotor or fan wheel 7 and stator or process air coil 20 into the section 5 of the process air cycle (see arrow direction).
  • a first blower 7, 20 with rotor or fan wheel 7 and stator or process air coil 20 into the section 5 of the process air cycle (see arrow direction).
  • stator or process air coil 20 In the lower part of the process air coil 20 there is an opening 17, through which water can enter a second collecting vessel 12.
  • the opening 17, the second collecting vessel 12 and the pipe socket 19 thus form an example of a guide arrangement, with which water from the process air coil 20 can be sucked into the first collecting vessel 11 and disposed of together with the separated from the process air in the condenser 20 water.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Drying Of Solid Materials (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)

Abstract

The invention relates to a condensation dryer 1 having a drying chamber (2) and a process-air circuit 3, 4, 5 for circulating process air through the drying chamber 2. The process-air circuit 3, 4, 5 leads from the drying chamber 2 first of all to a condenser 10 for cooling the process air, separating water from the process air and collecting the water in a first collecting vessel 11, then to a first fan 7, 20 for driving the process air, then to a heater 13 for heating the process air and then to the drying chamber 2 again. The first fan 7, 20 has a rotor 7 and a stator 20 which is configured as a process-air coil 20. According to the invention, a guiding arrangement 12, 17, 19 is formed between the process-air coil 20 and the first collecting vessel, through which guiding arrangement 12, 17, 19 water can be transported from the fan 7, 20 into the first collecting vessel 11. In the method according to the invention for drying laundry in a condensation dryer 1 of this type, water which is accumulated in the process-air coil 20 is transported through the guiding arrangement 12, 17, 19 into the first collecting vessel 11 by means of a pressure difference which is produced between the condenser 20 and the fan 7, 20.

Description

Die Erfindung betrifft einen Kondensationstrockner mit einer Trocknungskammer und einem Prozessluftkreis zur Zirkulierung von Prozessluft durch die Trocknungskammer, wobei der Prozessluftkreis von der Trocknungskammer zuerst zu einem Kondensator zum Abkühlen der Prozessluft, Abscheiden von Wasser aus der Prozessluft und Sammeln des Wassers in einem ersten Auffanggefäß, danach zu einem ersten Gebläse zum Antreiben der Prozessluft, danach zu einer Heizung zum Erwärmen der Prozessluft und dann wieder zur Trocknungskammer führt, und wobei das erste Gebläse einen Rotor und einen als Prozessluftspirale ausgebildeten Stator aufweist. Ebenso betrifft die Erfindung ein Verfahren zum Trocknen von Wäsche in einem solchen Kondensationstrockner.The invention relates to a condensation dryer having a drying chamber and a process air circuit for circulating process air through the drying chamber, the process air circuit from the drying chamber first to a condenser for cooling the process air, separating water from the process air and collecting the water in a first receiver, thereafter to a first fan for driving the process air, then to a heater for heating the process air and then back to the drying chamber, and wherein the first fan has a rotor and a stator formed as a process air spiral. Likewise, the invention relates to a method for drying laundry in such a condensation dryer.

Ein solcher Kondensationstrockner und ein solches Verfahren gehen hervor aus der Schrift DE 41 06 713 A1 . Dort ist ein Kondensationstrockner beschrieben, bei dem ein Gebläse Schaufeln aufweist, über denen sich im Betrieb ein Druckgefälle bildet. Das Gebläse ist so positioniert, dass es mit Feuchtigkeit gesättigte Luft fördert, so dass es in den Bereichen an den Schaufeln, in denen der Druck relativ niedrig ist, zu einem weiteren Auskondensieren von Feuchtigkeit kommt. Das dabei im Gehäuse des Gebläses anfallende Kondensat kann durch einen entsprechenden Abfluss einem Kondensatsammelbehälter zugeführt werden.Such a condensation dryer and such a method are apparent from the document DE 41 06 713 A1 , There, a condensation dryer is described, in which a fan has blades over which forms a pressure gradient during operation. The fan is positioned to deliver moisture-saturated air so that further condensation of moisture occurs in the areas on the vanes where the pressure is relatively low. The resulting in the housing of the blower condensate can be fed through a corresponding outlet to a condensate collector.

In einem Kondensationstrockner (Kondensationswäschetrockner) arbeiten im Allgemeinen ein geschlossener Heißluftkreislauf (Prozessluftkreislauf) und ein offener Kühlluftstrom. Im Heißluftkreislauf wird mittels strömender Prozessluft die zu trocknende Wäsche erwärmt, das dabei verdunstende Wasser aufgenommen und zu einem Wärmeaustauscher (Kondensator) transportiert. Dort kondensiert das in der Prozessluft enthaltene Wasser aufgrund einer Abkühlung mit der Kühlluft und wird von der Prozessluft abgeschieden und in einem Kondensatbehälter gesammelt. Die auf diese Weise entfeuchtete Prozessluft wird durch ein Heizaggregat wieder aufgeheizt und danach erneut durch die zu trocknende Wäsche geführt. In einem Kondensationstrockner befindet sich im Allgemeinen ein Prozessluftgebläse, in dessen unterem Teil sich das der feuchten Wäsche entzogene Wasser anreichert. Dies trifft insbesondere beim Stillstand des Kondensationstrockners zu. Der untere Teil des Prozessluftgebläses liegt konstruktionsbedingt im Allgemeinen tiefer als der Kondensatbehälter, der zum Auffangen des Wassers aus der zum Trocknen der feuchten Wäsche verwendeten Prozessluft benutzt wird.In a condensation dryer (condensation dryer) work generally a closed hot air circuit (process air circuit) and an open cooling air flow. In the hot air circulation, the laundry to be dried is heated by means of flowing process air, the water being absorbed and transported to a heat exchanger (condenser). There, the water contained in the process air condenses due to cooling with the cooling air and is separated from the process air and collected in a condensate tank. The dehumidified process air is reheated by a heating unit and then passed through the laundry to be dried again. In a condensation dryer is located in the In general, a process air blower, in the lower part of which the water removed from the wet laundry accumulates. This is especially true when the condensation dryer is at a standstill. The lower part of the process air blower, by design, is generally lower than the condensate tank used to catch the water from the process air used to dry the wet laundry.

Ein Gebläse in einem Spiralgehäuse, insbesondere zum Einsatz in einem Kondensationstrockner, geht hervor aus der EP 1 046 822 B1 , der EP 0 702 105 B1 oder dem US-Patent 5,915,922 . Ein Kondensator für einen Kondensationstrockner ist beschrieben in der EP 1 050 618 B1 .A blower in a spiral housing, in particular for use in a condensation dryer, is apparent from the EP 1 046 822 B1 , of the EP 0 702 105 B1 or the U.S. Patent 5,915,922 , A condenser for a condenser dryer is described in U.S. Patent No. 5,376,866 EP 1 050 618 B1 ,

Aufgabe der Erfindung ist es daher, einen Kondensationstrockner und ein Verfahren bereitzustellen, bei denen das in dem Prozessluftgebläse anfallende Wasser entfernt und insbesondere in einen Kondensatbehälter zur Entsorgung durch eine Bedienperson überführt werden kann.The object of the invention is therefore to provide a condensation dryer and a method in which the water accumulating in the process air blower can be removed and, in particular, transferred to a condensate container for disposal by an operator.

Demgemäß wurden der Kondensationstrockner gemäß Anspruch 1 und das Verfahren gemäß Anspruch 7 erfunden. Bevorzugte Ausführungsformen sind in abhängigen Patentansprüchen aufgeführt.Accordingly, the condensation dryer according to claim 1 and the method according to claim 7 have been invented. Preferred embodiments are listed in dependent claims.

Der erfindungsgemäße Kondensationstrockner mit einer Trocknungskammer und einem Prozessluftkreis zur Zirkulierung von Prozessluft durch die Trocknungskammer, wobei der Prozessluftkreis von der Trocknungskammer zuerst zu einem Kondensator zum Abkühlen der Prozessluft, Abscheiden von Wasser aus der Prozessluft und Sammeln des Wassers in einem ersten Auffanggefäß, danach zu einem ersten Gebläse zum Antreiben der Prozessluft, danach zu einer Heizung zum Erwärmen der Prozessluft und dann wieder zur Trocknungskammer führt, und wobei das erste Gebläse einen Rotor und einen als Prozessluftspirale ausgebildeten Stator aufweist, zeichnet sich dadurch aus, dass zwischen der Prozessluftspirale und dem ersten Auffanggefäß eine Leitanordnung gebildet ist, durch welche Wasser aus dem Gebläse mittels einer sich zwischen dem Kondensator und dem Gebläse einstellenden Druckdifferenz in das erste Auffanggefäß transportierbar ist.The condensation dryer according to the invention with a drying chamber and a process air circuit for circulating process air through the drying chamber, wherein the process air circuit from the drying chamber first to a condenser for cooling the process air, separating water from the process air and collecting the water in a first collecting vessel, then to a first blower for driving the process air, then to a heater for heating the process air and then back to the drying chamber, and wherein the first blower has a rotor and a stator formed as a process air spiral, characterized in that between the process air spiral and the first collecting vessel a guide arrangement is formed, through which water from the fan can be transported by means of an adjusting between the condenser and the fan pressure difference in the first collecting vessel.

Das erfindungsgemäße Verfahren zum Trocknen von Wäsche mit einem solchen Kondensationstrockner zeichnet sich dadurch aus, Wasser, welches sich in der Prozessluftspirale sammelt, durch die zwischen der Prozessluftspirale und dem ersten Auffanggefäß gebildete Leitanordnung mittels einer sich zwischen dem Kondensator und dem Gebläse einstellenden Druckdifferenz in das erste Auffanggefäß transportiert wird.The inventive method for drying laundry with such a condensation dryer is characterized by water, which collects in the process air spiral, formed by the between the process air coil and the first collecting vessel guide assembly by means of an adjusting between the condenser and the fan pressure difference in the first Collecting vessel is transported.

Bevorzugt ist ein Kondensationstrockner, bei dem die Leitanordnung eine Öffnung in der Prozessluftspirale, ein über diese mit dem Gebläse kommunizierendes zweites Auffanggefäß, in welches Wasser aus der Prozessluftspirale eintropfen kann, und einen mit dem zweiten Auffanggefäß und dem ersten Auffanggefäß kommunizierenden Rohrstutzen umfasst. Bei dieser Ausführung kann Wasser, welches in die Prozessluftspirale gelangt, ohne weiteres in das zweite Auffanggefäß tropfen, so dass die Prozessluftspirale weitgehend trocken gehalten werden kann. Das zweite Auffanggefäß wird durch einen Rohrstutzen in die nötige Kommunikation mit dem ersten Auffanggefäß gebracht, so dass ein konstruktiv eventuell erforderlicher Höhenunterschied zwischen der Prozessluftspirale und dem Kondensator bzw. dem mit diesem kommunizierenden ersten Auffanggefäß überbrückt werden kann, unter Ausnutzung einer Druckdifferenz zwischen Saug-und Druckseite des Gebläses. Weiterhin ist ein Kondensationstrockner bevorzugt, bei dem sich die Öffnung an der vertikal untersten Stelle der Prozessluftspirale befindet.Preference is given to a condensation dryer in which the guide arrangement has an opening in the process air spiral, a second one communicating with the fan via the latter Collecting vessel, in which water from the process air spiral can drip, and a communicating with the second receptacle and the first receptacle pipe socket comprises. In this embodiment, water that enters the process air spiral, drip easily into the second receptacle, so that the process air coil can be kept largely dry. The second receptacle is brought through a pipe socket in the necessary communication with the first receptacle, so that a structurally possibly required height difference between the process air coil and the condenser or communicating with this first receptacle can be bridged, taking advantage of a pressure difference between suction and Pressure side of the blower. Furthermore, a condensation dryer is preferred in which the opening is located at the vertically lowest point of the process air spiral.

Beim erfindungsgemäßen Kondensationstrockner kann es sich um einen Trockner mit oder ohne Wärmepumpenkreislauf handeln.The condensation dryer according to the invention may be a dryer with or without a heat pump cycle.

Ebenfalls bevorzugt ist ein Kondensationstrockner, bei dem das erste Gebläse ein Zentrifugalgebläse ist.Also preferred is a condensation dryer in which the first blower is a centrifugal blower.

Ein besonders bevorzugter Kondensationstrockner zeichnet sich dadurch aus, dass das erste Auffanggefäß mit einem oberhalb diesem liegenden Kondensatbehälter zur Sammlung des Wassers kommuniziert. In einem solchen Kondensatbehälter kann aufgesammeltes Kondensat einschließlich des aus der Prozessluftspirale transportierten Wassers einfach zur Entsorgung durch eine Bedienperson bereitgestellt werden.A particularly preferred condensation dryer is characterized in that the first collecting vessel communicates with a condensate container above it for collecting the water. In such a condensate container, collected condensate including the water carried from the process air coil can be easily provided for disposal by an operator.

Ein ebenfalls besonders bevorzugter Kondensationstrockner weist einen offenen oder geschlossenen Kühlluftkanal auf, durch welchen dem Kondensator mittels einen zweiten Gebläses Kühlluft aus einer Umgebung des Kondensationstrockners zugeführt und nach dem Kühlen der Prozessluft aus dem Kondensationstrockner herausgeführt werden kann.A likewise particularly preferred condensation dryer has an open or closed cooling air duct, through which the condenser can be supplied by means of a second blower cooling air from an environment of the condensation dryer and led out after cooling the process air from the condensation dryer.

Bei Stillstand des Kondensationstrockners, d.h. bei Stillstand des Stators oder Ventilatorrades im ersten Gebläse, herrscht im unteren Bereich bzw. an der tiefstliegenden Stelle der Prozessluftspirale atmosphärischer Druck. Beim Einschalten des Kondensationstrockners und damit des Ventilators im Gebläse liegt dagegen in Strömungsrichtung der Prozessluft vor dem Gebläse (Ventilatorrad) ein Unterdruck, während dahinter ein Überdruck besteht.At standstill of the condensation dryer, i. at standstill of the stator or fan wheel in the first fan, prevails in the lower region or at the lowest point of the process air coil atmospheric pressure. When you turn on the condensation dryer and thus the fan in the fan, however, in the flow direction of the process air in front of the blower (fan wheel) is a negative pressure, while behind there is an overpressure.

Die Erfindung hat zahlreiche Vorteile. So befindet sich kein Kondensat in der Prozessluftspirale. Das Kondensatwasser sammelt sich nicht in der Prozessluftspirale, sondern wird zentral aufgefangen, und kann leicht und regelmäßig entsorgt werden.The invention has numerous advantages. So there is no condensate in the process air spiral. The condensate water does not collect in the process air spiral, but is collected centrally, and can be easily and regularly disposed of.

Ausführungsbeispiele des erfindungsgemäßen Kondensationstrockners und Verfahrens werde anhand von Figur 1 und Figur 2 erläutert.

  • Figur 1 zeigt einen Kondensationstrockner;
  • Figur 2 zeigt den Bereich in dem Kondensationstrockner, in dem sich die Prozessluftspirale befindet.
Embodiments of the condensation dryer according to the invention and method will be based on FIG. 1 and FIG. 2 explained.
  • FIG. 1 shows a condensation dryer;
  • FIG. 2 shows the area in the condensation dryer in which the process air spiral is located.

Der Kondensationstrockner 1 gemäß Figur 1 weist eine Trocknungskammer 2 auf, in die das zu trocknende Gut, im Allgemeinen Wäsche, eingefüllt wird. Die Trocknungskammer 2 kann über einen nicht dargestellten Motor angetrieben werden. Mittels eines ersten Gebläses 7 wird der Trocknungskammer 2 in Pfeilrichtung die mittels einer Heizung 13 erwärmte Prozessluft zugeführt. Die dem Kondensationstrockner 1 zugeleitete Luft wird in einem geschlossenen Prozessluftkreis 3,4,5 geführt. Von der Trocknungskammer 2 strömt die mit Feuchtigkeit angereicherte Prozessluft in den Kondensator 10, wo die Feuchtigkeit in Abhängigkeit von der Kühlung im Kondensator 10 kondensiert und in einem ersten Auffanggefäß 11 aufgefangen wird. Die auf diese Weise getrocknete Prozessluft wird dann durch das erste Gebläse 7 hindurch über eine Heizung 13 geleitet und erwärmt. Anschließend wird die erwärmte Prozessluft wieder in die Trocknungskammer 2 geführt, womit der Kreislauf der Prozessluft geschlossen ist.The condensation dryer 1 according to FIG. 1 has a drying chamber 2, in which the material to be dried, generally laundry, is filled. The drying chamber 2 can be driven by a motor, not shown. By means of a first blower 7, the drying chamber 2 is supplied with the process air heated by means of a heater 13 in the direction of the arrow. The air fed to the condensation dryer 1 is conducted in a closed process air circuit 3, 4, 5. From the drying chamber 2, the process air enriched with moisture flows into the condenser 10, where the moisture is condensed in the condenser 10 as a function of the cooling and collected in a first collecting vessel 11. The process air dried in this way is then passed through the first fan 7 through a heater 13 and heated. Subsequently, the heated process air is fed back into the drying chamber 2, whereby the cycle of the process air is closed.

Das erste Auffanggefäß 11 befindet sich in der Nähe des Kondensators 10 und damit an einem recht tief liegenden und für eine nicht fachkundige Bedienperson schlecht zugänglichen Ort. Um die Entsorgung des kondensierten Wassers auch für eine solche Bedienperson möglich zu machen, wird das Wasser aus dem ersten Auffanggefäß 11 in einen besser zugänglichen Kondensatbehälter 14 gepumpt; eine dazu vorgesehene Pumpe ist der Übersicht halber nicht dargestellt. Der Kondensatbehälter 14 kann nach jeder Benutzung des Kondensationstrockners 1 leicht entleert werden.The first collecting vessel 11 is located in the vicinity of the condenser 10 and thus at a location that is quite low and difficult to access for a non-expert operator. In order to make the disposal of condensed water possible for such an operator, the water from the first receptacle 11 is pumped into a more accessible condensate tank 14; a designated pump is not shown for clarity. The condensate tank 14 can be easily emptied after each use of the condensation dryer 1.

Die Stelle der Prozessluftspirale 20 ist in der schematischen Zeichnung der Figur 1 nur angedeutet. Am unteren Ende der Prozessluftspirale 20 befindet sich ein zweites Auffanggefäß 12, das über einen Rohrstutzen 19 mit dem darüber liegenden ersten Auffanggefäß 11 verbunden ist.The location of the process air coil 20 is shown in the schematic drawing of FIG. 1 only hinted. At the lower end of the process air coil 20 is a second collecting vessel 12, which is connected via a pipe socket 19 with the overlying first collecting vessel 11.

Im Kondensationstrockner 1 der Figur 1 werden das erste Gebläse 7 und das zweite Gebläse 8, welches Kühlluft für den Kondensator 10 fördert, durch einen gemeinsamen Motor, der sich in einer Antriebseinheit 6 befindet, angetrieben. Der Antrieb der beiden Gebläse 7 und 8 kann jedoch auch getrennt erfolgen.In the condensation dryer 1 of FIG. 1 For example, the first blower 7 and the second blower 8, which conveys cooling air for the condenser 10, are driven by a common motor located in a drive unit 6. However, the drive of the two fans 7 and 8 can also be done separately.

Der Prozessluftkreislauf 3, 4, 5 muss nicht notwendig geschlossen sein; gegebenenfalls kann durch ein geeignetes System von Klappen oder dergleichen zwischen einem offenen und einem geschlossenen Prozessluftkreislauf 3, 4, 5 gewechselt werden. In Figur 1 ist der Prozessluftkreislauf aus Gründen der vereinfachten Darstellung geschlossen.The process air circuit 3, 4, 5 need not necessarily be closed; if necessary, it is possible to change between an open and a closed process air circuit 3, 4, 5 by means of a suitable system of flaps or the like. In FIG. 1 the process air cycle is closed for the sake of simplicity.

Der Kondensationstrockner 1 gemäß Figur 1 weist einen offenen Kühlluftkanal 9 auf, in dem ein Kühlluftstrom von Kühllufteintritt 15 bis zum Kühlluftaustritt 16 befördert wird. Erfindungsgemäß ist jedoch ein geschlossener Kühlluftstromkreislauf möglich, oder der Kondensator 10 und die Heizung 13 können Komponenten einer Wärmepumpe sein.The condensation dryer 1 according to FIG. 1 has an open cooling air channel 9, in which a cooling air flow from the cooling air inlet 15 is conveyed to the cooling air outlet 16. According to the invention, however, a closed cooling air flow circuit is possible, or the condenser 10 and the heater 13 may be components of a heat pump.

Figur 2 zeigt den Bereich in dem Kondensationstrockner, in dem sich die Prozessluftspirale 20 befindet (in Abschnitt 4 des Prozessluftkreislaufes). FIG. 2 shows the area in the condensation dryer in which the process air coil 20 is located (in section 4 of the process air cycle).

Die im Abschnitt 4 des Prozessluftkreislaufes in Pfeilrichtung eintretende Prozessluft wird mittels eines ersten Gebläses 7, 20 mit Rotor oder Ventilatorrad 7 und Stator oder Prozessluftspirale 20 in den Abschnitt 5 des Prozessluftkreislaufes befördert (siehe Pfeilrichtung). Im unteren Teil der Prozessluftspirale 20 befindet sich eine Öffnung 17, durch welche Wasser in ein zweites Auffanggefäß 12 gelangen kann.The process air entering in the arrow direction in section 4 of the process air cycle is conveyed by means of a first blower 7, 20 with rotor or fan wheel 7 and stator or process air coil 20 into the section 5 of the process air cycle (see arrow direction). In the lower part of the process air coil 20 there is an opening 17, through which water can enter a second collecting vessel 12.

Durch die Drehbewegung des Ventilatorrades 7 um die Ventilatorachse 18 entsteht am Außenumfang des Ventilatorrades 7 ein Überdruck (in Figur 2 durch ein "+" angedeutet). Vor dem Gebläses 7, 20, insbesondere auch im Bereich des oberen ersten Auffanggefäßes 11, entsteht dagegen ein Unterdruck (in Figur 2 durch ein "-" angedeutet). Da aufgrund des Betriebes des Gebläses 7, 20 auch im Bereich des zweiten Auffanggefäßes 12 ein Überdruck erzeugt wird, kann das dort eingetropfte Wasser durch einen Rohrstutzen 19 hindurch, der sowohl in das zweite Auffanggefäß 12 wie auch in das erste Auffanggefäß 11 ragt, aufgrund der Druckdifferenz in das oben liegende erste Auffanggefäß 11 transportiert werden. Von dort kann das Wasser dann weiter zu dem Kondensatbehälter 14 befördert werden, wie bereits ausgeführt. Die Öffnung 17, das zweite Auffanggefäß 12 und der Rohrstutzen 19 bilden somit ein Beispiel für eine Leitanordnung, mit welcher Wasser aus der Prozessluftspirale 20 in das erste Auffanggefäß 11 gesaugt und zusammen mit dem im Kondensator 20 aus der Prozessluft abgeschiedenen Wasser entsorgt werden kann.By the rotational movement of the fan wheel 7 about the fan axis 18 is formed on the outer circumference of the fan wheel 7, an overpressure (in FIG. 2 indicated by a "+"). In contrast, before the blower 7, 20, in particular in the region of the upper first collecting vessel 11, a negative pressure (in FIG. 2 indicated by a "-"). As a result of the operation of the blower 7, 20, an overpressure is also generated in the region of the second collecting vessel 12, the water dropped there can pass through a pipe socket 19, which protrudes both into the second collecting vessel 12 and into the first collecting vessel 11 Pressure difference in the overhead first collecting vessel 11 are transported. From there, the water can then be transported on to the condensate tank 14, as already stated. The opening 17, the second collecting vessel 12 and the pipe socket 19 thus form an example of a guide arrangement, with which water from the process air coil 20 can be sucked into the first collecting vessel 11 and disposed of together with the separated from the process air in the condenser 20 water.

Claims (8)

  1. Condensation drier (1) with a drying chamber (2) and a process air circuit (3, 4, 5) for circulation of process air through the drying chamber (2), wherein the process air circuit (3, 4, 5) leads from the drying chamber (2) initially to a condenser (10) for cooling the process air, separation of water from the process air and collection of the water in a first collecting vessel (11), thereafter to a first fan (7, 20) for driving the process air, thereafter to heating means (13) for heating the process air and then back to the drying chamber (2), and wherein the first fan (7, 20) comprises a rotor (7) and a stator (20), which is constructed as a process air spiral (20), characterised in that formed between the process air spiral (20) and the first collecting vessel is a guide arrangement (12, 17, 19) through which water is transportable from the fan (7, 20) to the first collecting vessel (11) by means of a pressure difference arising between the condenser (20) and the fan (7, 20).
  2. Condensation drier (1) according to claim 1, in which the guide arrangement (12, 17, 19) comprises an opening (17) in the process air spiral (20), a second collecting vessel (12), which communicates by way of this with the fan (7, 20) and into which water from the process air spiral (20) can drip, and a stub pipe (19) communicating with the second collecting vessel (12) and the first collecting vessel (11).
  3. Condensation drier (1) according to claim 2, in which the opening (17) is disposed at a vertically lowermost point of the process air spiral (20).
  4. Condensation drier (1) according to any one of the preceding claims, in which the first fan (7, 20) is a centrifugal fan (7, 20).
  5. Condensation drier (1) according to any one of the preceding claims, in which the first collecting vessel (11) communicates with a condensate container (14), which is disposed above this, for collection of the water.
  6. Condensation drier (1) according to any one of the preceding claims, which comprises an open or closed cooling air channel (9) through which cooling air is fed from an environment of the condensation drier (1) to the condenser (10) by means of a second fan (8) and can be conducted out of the condensation drier (1) after cooling of the process air.
  7. Method for drying laundry in a condensation drier (1) with a drying chamber (2) and a process air circuit (3, 4, 5) for circulation of process air through the drying chamber (2), wherein the process air circuit (3, 4, 5) leads from the drying chamber (2) initially to a condenser (10) for cooling the process air, separation of water from the process air and collection of the water in a first collecting vessel (11), thereafter to a first fan (7, 20) for driving the process air, thereafter to heating means (13) for heating the process air and then back to the drying chamber (2), and wherein the first fan (7, 20) comprises a rotor (7) and a stator (20), which is constructed as a process air spiral (20), characterised in that water collecting in the process air spiral (20) is transported to the first collecting vessel (11) through a guide arrangement (12, 17, 19), which is formed between the process air spiral (20) and the first collecting vessel, by means of a pressure difference arising between the condenser (20) and the fan (7, 20).
  8. Method according to claim 7, in which the water collected in the first collecting vessel (11) is pumped into a condensate container (14).
EP07727968A 2006-05-10 2007-04-11 Condensation dryer having a process-air coil, and method for drying in a condensation dryer of this type Not-in-force EP2024552B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006021828A DE102006021828A1 (en) 2006-05-10 2006-05-10 Condensation dryer with a process air spiral, and method for drying in such a condensation dryer
PCT/EP2007/053500 WO2007128641A1 (en) 2006-05-10 2007-04-11 Condensation dryer having a process-air coil, and method for drying in a condensation dryer of this type

Publications (2)

Publication Number Publication Date
EP2024552A1 EP2024552A1 (en) 2009-02-18
EP2024552B1 true EP2024552B1 (en) 2010-03-10

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EP07727968A Not-in-force EP2024552B1 (en) 2006-05-10 2007-04-11 Condensation dryer having a process-air coil, and method for drying in a condensation dryer of this type

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EP (1) EP2024552B1 (en)
AT (1) ATE460526T1 (en)
DE (2) DE102006021828A1 (en)
WO (1) WO2007128641A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009080577A1 (en) * 2007-12-20 2009-07-02 BSH Bosch und Siemens Hausgeräte GmbH Washing/drying device comprising a process air channel
DE102007061523A1 (en) * 2007-12-20 2009-06-25 BSH Bosch und Siemens Hausgeräte GmbH Laundry drying apparatus e.g. air-cooled laundry drying device, has process air duct draining condensate water from condensation device into drum housing, and water drainage channel discharging from process air duct
DE102009003170A1 (en) 2009-05-15 2010-12-02 BSH Bosch und Siemens Hausgeräte GmbH Fan wheel, blower with a fan wheel, clothes dryer with a fan and method of manufacturing a fan

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875681A (en) * 1974-02-27 1975-04-08 Gen Electric Condenser apparatus
FR2664625B1 (en) * 1990-07-10 1993-12-24 Ciapem TURBINE DRYER.
DE4106713A1 (en) * 1991-03-02 1992-09-03 Bauknecht Hausgeraete Condensation dryer features ventilator - which is located in closed circulation system part with highest moisture saturation
DE4238546A1 (en) * 1992-11-14 1994-05-19 Bauknecht Hausgeraete Laundry dryer has condensate container - connected to sump container via pipe connection where sump container has condensate collection opening
DE4432567A1 (en) * 1994-09-13 1996-03-14 Bosch Siemens Hausgeraete Housing for a blower in a household appliance, in particular in a household clothes dryer
US5806204A (en) * 1997-06-13 1998-09-15 Mmats, Inc. Material dryer using vacuum drying and vapor condensation
EP1050618B1 (en) * 1999-04-08 2003-10-15 BSH Bosch und Siemens Hausgeräte GmbH Heat exchanger for laundry drier
DE19918085A1 (en) * 1999-04-21 2000-10-26 Bsh Bosch Siemens Hausgeraete Blower with a spiral casing

Also Published As

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DE502007003089D1 (en) 2010-04-22
EP2024552A1 (en) 2009-02-18
ATE460526T1 (en) 2010-03-15
WO2007128641A1 (en) 2007-11-15
DE102006021828A1 (en) 2007-11-15

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