[go: up one dir, main page]

WO2009080431A1 - Appareil ménager d'entretien du linge et procédé de fonctionnement d'un appareil ménager de ce type - Google Patents

Appareil ménager d'entretien du linge et procédé de fonctionnement d'un appareil ménager de ce type Download PDF

Info

Publication number
WO2009080431A1
WO2009080431A1 PCT/EP2008/066112 EP2008066112W WO2009080431A1 WO 2009080431 A1 WO2009080431 A1 WO 2009080431A1 EP 2008066112 W EP2008066112 W EP 2008066112W WO 2009080431 A1 WO2009080431 A1 WO 2009080431A1
Authority
WO
WIPO (PCT)
Prior art keywords
process air
heater
heating device
drum
domestic appliance
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.)
Ceased
Application number
PCT/EP2008/066112
Other languages
German (de)
English (en)
Inventor
Kai-Uwe Bache
Andreas Stolze
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of WO2009080431A1 publication Critical patent/WO2009080431A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis

Definitions

  • the invention relates to a domestic appliance for the care of items of laundry, in particular a dryer, with a drum for receiving laundry items and a process air duct through which process air can be conducted to and through the drum, and a heater which is thermodynamically coupled to the process air guided in the process air duct and is arranged upstream of the drum. Furthermore, the invention relates to a method for operating a domestic appliance for the care of laundry items, in particular a dryer.
  • a tumble dryer is operated as a vented dryer or as a condensation dryer.
  • An exhaust air dryer passes heated air once through the laundry to be dried and carries this moisture-laden air through an exhaust hose from the exhaust air dryer from the room in which it is placed.
  • a condensation dryer the operation of which is based on the condensation of moisture evaporated by means of warm process air from the laundry, requires no exhaust hose and allows energy recovery from the heated process air, for example by using a heat pump.
  • an exhaust air dryer By contrast, in the case of an exhaust air dryer, the air laden with moisture after passing through a laundry drum is generally passed out of the dryer.
  • an exhaust air dryer can be constructed simpler and thus more cost-effective.
  • An exhaust air dryer draws air from its environment during operation and uses it directly for drying. Such ambient air is usually relatively dry with a relative humidity of significantly less than 100%, and therefore can absorb a relatively large amount of moisture.
  • the circulating process air in a condensation dryer can generally only be dehumidified to 100% relative humidity at the lowest temperature present in the process air cycle, which limits its absorption capacity for moisture from the objects to be dried and thus imposes some restriction in the drying process. Heat recovery is also possible in an exhaust air dryer.
  • a tumble dryer with heat recovery designed as a vented dryer.
  • the tumble dryer comprises a movable and the laundry items receiving drum into which a heated by a heating supply air flows, while the moist hot air is conducted as exhaust air through an outlet.
  • a heat exchanger is arranged in front of the heating element, which is flowed through by the hot-humid exhaust air from the drum.
  • Exhaust air dryers may be designed as systems sucking or tumbling into the drum, depending on whether a blower is placed in the process air duct before or after the drum for conveying the process air flow.
  • the heating device which is usually arranged upstream of the drum, can also be flowed through in an oppressive or suction manner.
  • a temperature limiter may be provided which can turn off the heater, this temperature limiter is placed in the flow direction.
  • An inventive domestic appliance for the care of items of laundry comprises a drum for receiving the laundry items and a process air duct through which process air can be conducted to and through the drum. Furthermore, the household appliance includes a Heating device which is thermodynamically coupled with the guided in the process air duct process air and upstream of the drum. Downstream of the drum, the process air duct is branched into a main duct and into a side duct branching off from it, and the auxiliary duct opens into the heating device or upstream of the heating device into the process air duct.
  • a circulation of the process air in the main flow direction can be achieved even in unfavorable operating phases. Even with strong back pressure can be prevented by the fact that the flow direction in the process air flow reverses and a heater is no longer sufficiently flows around and thus overheated.
  • the air duct can thus be improved to avoid overheating of the heater.
  • a first temperature limiter for situation-specific shutdown of the heater or the heater between this heater and the drum in the process air guide is arranged. It is thus ensured a temperature monitoring of the heater on the basis of the flow direction in normal operation, which is arranged after the heater.
  • a second temperature limiter for situation-specific shutdown of the heating device is arranged upstream of the heating device in the process air duct.
  • a temperature control can also take place in front of the heating device so that overheating can also be detected here and, if necessary, the heating device can be switched off in good time.
  • the secondary channel opens downstream of a second temperature limiter and upstream of the heater in the process air duct.
  • the junction of the secondary channel in the process air duct is thus formed between the second temperature limiter and the heater.
  • the junction of the secondary channel can also be done directly in the heater.
  • the time duration of the return of the process air via the auxiliary channel to the heating device is preferably dependent on the temperature of the heating device and / or the flow velocity of the process air in the process air duct in the area of the heating device.
  • the time duration can thus preferably be automatically controlled by a control unit and thus adjusted as needed, so that the return of the process air is also time-optimized.
  • the time of the return of the process air via the auxiliary channel to the heating device is dependent on the temperature of the heating device and / or the flow velocity of the process air in the process air duct in the region of the heating device.
  • the specific time at which the return of the process air is to take place via the secondary channel can be determined individually and situation-specific.
  • the respective temperature detection and / or the flow velocity of the process air and / or the flow direction of the process air can be detected and output to a control unit via an appropriate sensor so that it controls the feedback of the process air via the auxiliary channel depending on this information ,
  • the proportion of the process air recirculated via the secondary channel to the heating device preferably depends on the temperature of the heating device and / or the flow velocity of the process air in the process air duct in the area of the heating device.
  • the dosage of the process air amount, which is to be performed on the secondary channel are set very precise and demand-dependent. This too can be electronically controlled and thus automatically adjusted.
  • an element for reducing the flow cross-section for example a flap or the like, is arranged at the branch of the secondary channel from the main channel, which element can be electronically controlled via a control unit.
  • the invention provides measures which satisfy the highest safety requirements with regard to overheating of the heating device in the air duct of the domestic appliance.
  • the design of the domestic appliance with preferably one or two temperature limiters can be made much more robust by this safety concept, or it can even be provided that the temperature limiter can be omitted upstream of the heater. This is achieved in that at least partially process air is passed through the secondary channel, which emerges from the drum and is returned to the heater. Optionally, although this raises the air temperature in front of the heater slightly, but by the significantly increased air flow through the heater, the temperature can then be significantly lowered. This higher volume flow makes the system basically less susceptible to increased air resistance and to the reversal of air flow due to, for example, a back pressure.
  • the proportion of recirculated air via the secondary duct ensures in all cases that the air flow through the heating device in the main flow direction is maintained at larger boundary locations.
  • the second temperature limiter in front of the heating device can preferably be dispensed with completely or designed to be significantly weaker than it would have to be designed without such a return of the process air via the auxiliary channel for the purpose of reducing the temperature of the heating device.
  • this safety concept is provided in exhaust air dryers, in which preferably components for heat recovery from the process air are arranged.
  • the domestic appliance also comprises a heat exchange device, which is preferably associated with a heat pump.
  • a heat exchange device which is preferably associated with a heat pump.
  • the domestic appliance is designed as an exhaust air dryer, it has an open process air duct.
  • the Process air can not be performed at least partially in a circuit in the household appliance. In principle, however, the process air in such an exhaust air dryer is sucked in through a supply air opening and pushed out of the household appliance via an exhaust air opening.
  • process air guided in a process air duct is thermally coupled to a heating unit arranged upstream of a drum for receiving laundry items and passed through the drum. Downstream of the drum, the process air duct is branched into a main duct and a side duct branching off from it, and the process air is fed back to the heating unit at least proportionally in terms of operating phase.
  • This procedure can prevent overheating of the heating device during unfavorable operating phases of the domestic appliance, in particular when the flow velocity of the process air in the region of the heating device is greatly reduced or flows in the opposite direction to the main flow direction due to a counterpressure.
  • the time duration of the return of the process air via the auxiliary channel to the heating device is preferably determined as a function of the temperature of the heating device and / or as a function of the flow rate of the process air in the process air duct in the region of the heating device.
  • the time of the return of the process air via the auxiliary channel to the heating device is determined as a function of the temperature of the heating device and / or the flow velocity of the process air in the process air duct in the region of the heating device.
  • the proportion of process air conducted via the auxiliary channel to the heating device is also preferably determined as a function of the temperature of the heating device and / or the flow rate of the process air in the process air duct in the region of the heating device.
  • the time duration and / or the time and / or the proportions of the process air conducted via the auxiliary channel can additionally or instead also be determined depending on the parameter of the flow direction of the process air in the process air duct in the region of the heating device.
  • Advantageous embodiments of the domestic appliance according to the invention are also to be regarded as advantageous embodiments of the method according to the invention.
  • FIGURE shows a sketchy representation of a designed as exhaust air dryer domestic appliance.
  • FIG. 1 shows in a sketch a domestic appliance designed as a vented dryer 1 for the care of laundry items, which comprises a process air duct with a process duct 2, which is designed as an open process air duct.
  • the dryer 1 also has a drum 3 for receiving items of laundry, which is rotatably mounted about an axis 4.
  • Process air guided in the process air duct is guided by means of a blower 5 through the drum 3 and laundry items (not shown) located therein.
  • the blower 5 is coupled in the main flow direction of the process air in front of the drum 3 and thus upstream of the drum 3 with the process air guide.
  • the process air passes through a lint filter 6, which in the simplest case is a lattice-shaped sieve to lint, d. H. small fibers, which entrains the process air by the rotation of the drum 3 against each other moving laundry pieces and entrains to catch.
  • the process air is drawn through a supply air opening 7 in the process air duct 2 and pushed out through an exhaust port 8.
  • air passes directly from the environment of the dryer 1.
  • an exhaust hose 9 With which the exhaust air from the dryer 1 away and from a building in which it is placed, is discharged.
  • the dryer 1 comprises a heat exchange device 10, 11.
  • the heat exchange device 10 and 11 is associated with a heat pump 15.
  • the heat pump 15 comprises a first heat exchanger, which is designed as an evaporator 10, and a second heat exchanger, which as Condenser 11 is formed.
  • the process air drawn in through the supply air opening is heated.
  • This heated process air is passed into the drum 3, where it comes into contact with the laundry to be dried and then flows to the lint filter 6.
  • the moist, warm and freed of any fluff process air is cooled in the evaporator 10.
  • the heat withdrawn from the process air heat is in a heat pump circuit 10 to 14, to the components of the evaporator 10 and the condenser 1 1 includes, led to the condenser 1 1 and fed there the freshly flowed process air.
  • the heat pump circuit 10 to 14 and thus the heat pump 15 is formed in addition to the evaporator 10 and the condenser 1 1 by a throttle 12 and a compressor 13, said components via a closed line system
  • Compressor 13 is compressed and heated. It then passes to the condenser 11, where it liquefies with the release of heat to the process air. Then it flows in
  • Compressor 13 so that the circuit closes.
  • the heat exchange device 10, 1 1 can also be considered as a heat pump 15 associated with it, but be designed as a countercurrent or cross-flow heat exchanger.
  • the fan 5 as already mentioned, arranged in front of the drum 3 and is thus designed as a pressing system. It can also be provided that the fan 5 is arranged in the main flow direction of the process air in the process air duct after the drum 3, so that this system is then designed as a sucking system.
  • the dryer 1 further comprises a heating device 16, which is arranged in the main flow direction in front of the drum 3. The heating device 16 is positioned so that it is thermodynamically coupled to the process air guided in the process air duct 2. As a result, the process air can be heated before it enters the drum 3.
  • a first temperature limiter 17 is arranged or coupled between the heating device 16 and the inlet of the drum 3 in the process air duct.
  • a second temperature limiter 18 is arranged in the main flow direction between the fan 5 and the heater 16 in the process air guide or coupled thereto.
  • the process air guide is branched after the drum 3 into a main channel 19 and into a secondary channel 20.
  • the secondary channel 20 branches off at the branch 21 from the main channel 19 and ends at the junction 22 in the process air duct.
  • the junction 22 is thus formed upstream of the heater 16. It can also be provided that, according to the dashed representation, the junction takes place directly into the heating device 16.
  • the junction 22 is formed in the process air duct before the heater 16 and after the second temperature limiter 18. It can also be provided that the junction 22 upstream and thus in the main flow direction before the second temperature limiter 18 is formed.
  • a flap 23 is arranged as an element for reducing the flow cross section of the process air channel 2 at the branch 21.
  • the flap 23 is electrically connected to the exemplified control unit 24, so that its adjustment is controlled by the control unit 24.
  • the heater 16 is controlled by the control unit 24.
  • the two temperature limiter 17 and 18 are connected to the control unit 24.
  • the control unit 24 may also be designed to control further components of the dryer 1 beyond.
  • This increased volume flow for maintaining the main flow direction of the process air makes the system more resistant to increased air resistance in the flow direction against the main flow direction and against the reversal of the air flow in general.
  • This volume of recirculated air generated via the secondary duct 20 also ensures that the air flow through the heating device 16 in the main flow direction is maintained at larger boundary positions.
  • the temperature limiter 18 may possibly be completely eliminated or can be designed significantly weaker than this must be the case if the described procedure with the process air line via the secondary channel 20 would not exist.
  • the time duration and / or the time of the return of the process air via the secondary channel 20 and / or the portion of the process air which is recycled via the secondary channel 20 is preferably automatically controlled as a function of the temperature limiters 17 and 18 by the control unit 24.

Landscapes

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

Abstract

La présente invention concerne un appareil ménager destiné à entretenir du linge, comprenant un tambour (3) destiné à recevoir le linge et une conduite d'air de traitement (2) permettant d'acheminer l'air de traitement jusqu'au tambour (3) et à travers celui-ci, et un dispositif de chauffage (16) couplé de façon thermodynamique à l'air de traitement guidé dans la conduite d'air de traitement (2) et disposé en amont du tambour (3), la conduite d'air de traitement (2) comprenant, en aval du tambour (3), un canal principal (19) et un canal auxiliaire (20) dérivé du canal principal et débouchant dans le dispositif de chauffage (16) ou en amont du dispositif de chauffage (16) dans la conduite d'air de traitement (2). La présente invention concerne également un procédé d'utilisation d'un appareil ménager d'entretien du linge.
PCT/EP2008/066112 2007-12-21 2008-11-25 Appareil ménager d'entretien du linge et procédé de fonctionnement d'un appareil ménager de ce type Ceased WO2009080431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007061985A DE102007061985A1 (de) 2007-12-21 2007-12-21 Hausgerät zur Pflege von Wäschestücken und Verfahren zum Betreiben eines derartigen Hausgeräts
DE102007061985.7 2007-12-21

Publications (1)

Publication Number Publication Date
WO2009080431A1 true WO2009080431A1 (fr) 2009-07-02

Family

ID=40259140

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/066112 Ceased WO2009080431A1 (fr) 2007-12-21 2008-11-25 Appareil ménager d'entretien du linge et procédé de fonctionnement d'un appareil ménager de ce type

Country Status (2)

Country Link
DE (1) DE102007061985A1 (fr)
WO (1) WO2009080431A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011078922A1 (de) * 2011-07-11 2013-01-17 BSH Bosch und Siemens Hausgeräte GmbH Abluft-Wäschetrocknung mit Zusatzheizung und Wärmetauscheraggregat
AT14404U1 (de) * 2013-11-06 2015-10-15 Curtius Fritz Verfahren zur Regelung der Wärmeaufgabe in Wäschetrocknern

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446468A1 (de) * 1984-12-20 1986-07-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum trocknen von waesche
EP0503586A1 (fr) * 1991-03-12 1992-09-16 Zanussi Elettrodomestici S.p.A. Amélioration dans les sèche-linge
WO2007137857A1 (fr) * 2006-06-01 2007-12-06 Electrolux Home Products Corporation N.V. Procédé d'alimentation en vapeur et appareil de traitement

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000865A1 (de) 1980-01-11 1981-07-16 Fichtel & Sachs Ag, 8720 Schweinfurt Waeschetrockner mit waermerueckgewinnung
DE4034274A1 (de) * 1990-10-27 1992-04-30 Zanker Gmbh Waeschetrockner und verfahren zur temperaturueberwachung bei einem waeschetrockner
DE19737075A1 (de) * 1997-08-26 1998-03-19 Joachim Rieder Wäschetrockner mit kontinuierlicher Wärmerückgewinnung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3446468A1 (de) * 1984-12-20 1986-07-03 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Verfahren und vorrichtung zum trocknen von waesche
EP0503586A1 (fr) * 1991-03-12 1992-09-16 Zanussi Elettrodomestici S.p.A. Amélioration dans les sèche-linge
WO2007137857A1 (fr) * 2006-06-01 2007-12-06 Electrolux Home Products Corporation N.V. Procédé d'alimentation en vapeur et appareil de traitement

Also Published As

Publication number Publication date
DE102007061985A1 (de) 2009-06-25

Similar Documents

Publication Publication Date Title
DE102008033388B4 (de) Trockner mit Wärmepumpenkreis
EP2140061B1 (fr) Sèche-linge à condensation et procédé permettant de faire fonctionner un sèche-linge à condensation
EP2199454B1 (fr) Appareil ménager doté d'un canal d'aération ouvert
EP1682715B1 (fr) Procede pour secher du linge et seche-linge pour mettre en oeuvre le procede
DE102007052839A1 (de) Trockner mit Wärmepumpenkreis
DE112008000876B4 (de) Hybridtrockner und Verfahren zum Betreiben eines solchen Hybridtrockners
DE19510001C2 (de) Trockenschrank mit verbesserter Energieausnutzung
DE102007057766A1 (de) Ablufttrockner mit einer Wärmepumpe und einem ersten Gebläse
DE102007016077A1 (de) Verfahren zum Betreiben eines Kondensationstrockners mit einem Wärmepumpenkreis, sowie entsprechender Kondensationstrockner
DE102013111491A1 (de) Bekleidungsbehandlungsvorrichtung mit einem Expansionsventil, das abhängig von dem Antriebsmodus variabel ist
EP2050862A1 (fr) Dispositif de filtrage de peluches et appareil ménager doté d'un tel dispositif de filtrage de peluches
DE102008004457A1 (de) Trockner mit einer Wärmepumpe und einem Gebläse
EP2160488A1 (fr) Sécheur à condensation muni d'une pompe à chaleur, et procédé pour le faire fonctionner
DE102012212162A1 (de) Trockner mit Wärmepumpe mit zusätzlicher Eignung für eine Raumentfeuchtung sowie Verfahren zu dessen Betrieb
EP2041359B1 (fr) Appareil ménager pour l'entretien du linge et procédé de guidage de l'air de refroidissement dans un appareil ménager de ce type
WO2009040237A1 (fr) Sécheur avec répartiteur de condensat, et procédé pour le faire fonctionner
EP2075368B1 (fr) Procédé d'élimination d'un condensat dans un appareil ménager d'entretien du linge
WO2009080431A1 (fr) Appareil ménager d'entretien du linge et procédé de fonctionnement d'un appareil ménager de ce type
EP2055826B1 (fr) Sèche-linge à évacuation d'air doté d'une récupération de chaleur et cuve de condensation ainsi que son procédé de fonctionnement
EP1205592B1 (fr) Armoire sèche-linge
DE19853234A1 (de) Wäschetrockner mit einer Wärmepumpe
EP2647755B1 (fr) Dispositif de traitement de linge doté d'un filtre commutable
DE102007016076A1 (de) Verfahren und Kondensationstrockner zum Betreiben eines Trocknungsprozesses
EP3739110B1 (fr) Appareil de séchage de linge et procédé de fonctionnement d'une pompe à chaleur d'un tel appareil
DE102007062775A1 (de) Trockner, insbesondere Ablufttrockner

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08865651

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08865651

Country of ref document: EP

Kind code of ref document: A1