EP2196577A1 - Séchoir doté d'une teneur en air ambiant et son procédé de fonctionnement - Google Patents

Séchoir doté d'une teneur en air ambiant et son procédé de fonctionnement Download PDF

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Publication number
EP2196577A1
EP2196577A1 EP09176618A EP09176618A EP2196577A1 EP 2196577 A1 EP2196577 A1 EP 2196577A1 EP 09176618 A EP09176618 A EP 09176618A EP 09176618 A EP09176618 A EP 09176618A EP 2196577 A1 EP2196577 A1 EP 2196577A1
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EP
European Patent Office
Prior art keywords
air
dryer
duct
lint filter
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP09176618A
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German (de)
English (en)
Other versions
EP2196577B1 (fr
Inventor
Günter Steffens
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
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BSH Bosch und Siemens Hausgeraete GmbH
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Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2196577A1 publication Critical patent/EP2196577A1/fr
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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 
    • D06F58/22—Lint collecting arrangements

Definitions

  • the invention relates to a dryer with recirculating air and a preferred method for its operation.
  • a clothes dryer is operated as an exhaust or condensation dryer.
  • Condensation dryers whose operation is based on the condensation of moisture evaporated from the laundry by means of warm process air, do not require an exhaust hose and allow energy recovery from the heated process air, for example by using a heat pump.
  • the condensate produced in the condensation dryer is collected and either pumped off or disposed of by manually emptying a collection container.
  • the air laden with moisture after passing through a laundry drum is generally passed out of the dryer. Heat recovery generally does not take place here.
  • Exhaust air dryers with heat recovery are known. This is how the document describes DE 30 00 865 A1 a clothes dryer with heat recovery.
  • the tumble dryer consists of a container receiving and moving the laundry, into which a supply air flow heated by a heating element opens, while the moist hot air is conducted as exhaust air via an outlet.
  • a heat exchanger is arranged in front of the heating element, which is flowed through by the moist hot exhaust air from the container.
  • the energy efficiency of an exhaust air dryer can also be improved by a recirculation system.
  • the process air laden with moisture from the laundry in the drying chamber is partially returned to the drying process via the heater.
  • the disadvantage here is that very many of the laundry in the drying chamber resulting lint can reach the heating. This can lead to a flurry of the downstream airways including the heating. Furthermore increase the risk of fire and fire, since the lint can ignite the heater and get into the laundry in the drying chamber.
  • Another disadvantage is that due to the higher relative humidity of the exhaust air and the process-related small outward process air flow, which is guided for example in the installation room, significantly more condensate in the usually long exhaust duct is formed and also deposit more lint in the exhaust duct.
  • the EP 0 468 573 A1 describes a device for cleaning a heat exchanger of a condenser device in a tumble dryer.
  • the existing of a plurality of mutually parallel slats heat exchanger can be cleaned on its side facing a condensate water tank side by means of a cleaning device.
  • the DE 86 05 014 U1 describes a device for automatically cleaning a lint filter, which is arranged in a screen housing and which retains lint contained in a guided through the screen housing and the lint filter lint, wherein the lint filter is movably mounted, in the screen housing an opening is provided, which is provided with a movable lid is closable, the lint filter can be brought into this opening and facilities are present, which generate a cleaning air flow from the back through the lint filter.
  • the DE 10 2005 054 684 A1 describes a device for drying laundry by means of an air flow, comprising a drum and a duct system for guiding the air flow, the duct system having a downstream side of the drum portion, in which the air flow is guided in a falling direction and in which a sieve for collecting disposed of lint from the air stream and the screen is associated with a squeegee for stripping trapped lint.
  • the DE 694 18 133 T2 relates to a cleaning device for the filter of a hot air flow drying circuit of a household electric machine with a drying container.
  • the cleaning device comprises fixed cleaning elements, preferably nozzles, through which water is passed, at least during a section at least an operating phase of the machine in the direction opposite to the air stream flowing through the filter to direct a jet of water on the filter.
  • the EP 1 098 028 B1 relates to a clothes dryer with a self-cleaning lint filter in a dry air duct, which has means for reducing or closing the cross section of the dry air duct and producing an air jet for blowing off lint from the lint filter when the dry air blower is switched on and a device for removing blown lint.
  • the DE 100 29 428 A1 describes an air-conducting domestic appliance with a filter arranged in the air flow, removable and washable, wherein the filter consists of a flexible fiber material and is equipped so that it can bind odors and / or decompose.
  • the DE 103 02 864 A1 describes a clothes dryer, in particular a condensation dryer, with a rotatably mounted laundry drum having at least one air inlet and at least one air outlet, and a fan for supplying air into the laundry drum, wherein a switching means for switching the air flow through the laundry drum between recirculation and exhaust air operation is available.
  • a filter for collecting the lint or other impurities, which are carried out with the exhaust air from the laundry drum may be additionally arranged.
  • the object of the present invention was therefore to provide an exhaust air dryer with high energy efficiency, which uses a proportion of circulating air and in which the disadvantages described above can be overcome by lint originating from the drying chamber.
  • the invention thus relates to a dryer with a drying chamber for the objects to be dried, a supply air duct, a process air duct in which there is a heater for heating the process air and the heated process air are guided by means of a blower over the objects to be dried and an exhaust duct can be performed to an exhaust air outlet, wherein the process air duct at a junction in a recirculation duct for heating and the exhaust duct, which leads to the exhaust air outlet, and wherein in the recirculation duct an internally and / or externally cleanable lint filter is arranged and the recirculation duct before the heating combined with the supply air duct.
  • the lint filter is preferably arranged at the branch.
  • an internally cleanable lint filter is provided with a cleaning device.
  • the cleaning device preferably comprises a stripping device and / or a flushing device.
  • the flushing device preferably comprises a reservoir for flushing fluid and a flushing line.
  • rinsing liquid can be used from the memory for cleaning the lint filter, being linted on the lint filter adhesive lint with the aid of the rinsing liquid.
  • the rinsing liquid containing the lint can then generally flow through a preferably closable opening ("discharge opening") located in the process air duct into a collecting container for the used rinsing liquid.
  • This collecting container is preferably a condensate tray or communicates with a condensate tray, possibly via a flushing water drain.
  • a reservoir for rinsing liquid is in particular a condensate tank or a part of a condensate tank in question, which can preferably accommodate the resulting in a condensate tray of a condensation dryer condensate.
  • Condensate tray and condensate pump are carried out a cleaning of the lint filter in the recirculating air duct.
  • the rinsing liquid can thus contain or consist of condensate. Possibly. may be added to the rinsing liquid detergent.
  • the flushing device can in addition to a rinsing liquid or alternatively use process air.
  • process air it is preferable that the lint filter be exposed to process air in a manner that permits detachment of lint adhering to the lint filter.
  • the flushing device has a suitably shaped air guide part for targeted admission of the lint filter with process air from the process air duct. In this case, the guidance of the process air is generally controlled in such a way that a detachment process of the lint adhering to the lint filter is supported.
  • the cleaning device comprises a stripping device.
  • the scraper device generally consists of a scraper and a mechanism for automatic or manual operation of the scraper.
  • This mechanism preferably comprises a magnetic or thermal actuator.
  • the wiper In a magnetic actuator, the wiper is actuated by an electrically triggered magnet, generally in conjunction with a return spring.
  • the wiper In a thermal actuator, the wiper is actuated, for example, due to the expansion of a melting wax.
  • the scraper Upon actuation of the scraper, it generally slides along the surface of the lint filter and scraps off fibers present on the lint filter.
  • the fluff are generally dry in the recirculating air duct, so that the embodiment with a stripping device is particularly preferred.
  • the externally cleanable lint filter is generally removable from the dryer for cleaning.
  • the dryer according to the invention generally also has a lint filter which is preferably located in the process air duct between the drying chamber and the branch located. This lint filter is used in particular for intercepting coarser lint. In general, therefore, the lint filter has larger openings than the lint filter.
  • the dryer according to the invention preferably comprises at least one heat exchanger.
  • the at least one heat exchanger in particular comprises heat sink and heat source of a heat pump.
  • the heat sink is preferably in contact with the exhaust duct.
  • a heat pump is known in various designs and can use various physical and chemical effects to pump heat absorbed into a heat sink by means of a suitable heat transfer means to a heat source where it is - usually at a higher temperature level than the heat sink - is discharged again.
  • a heat pump which utilizes the Peltier effect and in which the heat transport means consists of an array of Peltier elements.
  • a heat pump that utilizes adsorption or absorption as well as corresponding desorption between suitable agents. It can also be used a regenerative gas cycle for the realization of a heat pump.
  • the refrigerant of the heat pump vaporized due to the heating is supplied via a compressor to the condenser of the heat pump, which forms the heat source and where, due to the condensation of the gaseous refrigerant heat is released, which is used to heat the process air or supply air before entering the drying chamber.
  • the heat released in the heat source in the supply air duct for heating supply air or after combination of supply air duct and recirculating air duct can be used for heating the combined supply air and circulating air.
  • the dryer according to the invention can advantageously have a heat exchanger as an air-air heat exchanger.
  • the moist, hot process air from the drying chamber is preferably used for heating supply air, which is then fed to the drying chamber.
  • the exhaust air duct and the supply air duct preferably intersect in the air-to-air heat exchanger.
  • an air-to-air heat exchanger may be arranged in the exhaust duct between the branch and the evaporator of the heat pump.
  • the cleaning of the lint filter may be initiated by a user of the dryer or automatically.
  • a need for cleaning a lint filter can be determined in a dryer in a known manner and this cleaning requirement communicated to a user of the dryer by means of an optical and / or acoustic display device on the dryer.
  • the user can then remove manually by pulling the externally cleanable lint filter and clean outside of the dryer, for example by rinsing with water from adhering lint.
  • the user can trigger a cleaning of the lint filter by a cleaning device described above.
  • an internal cleaning of the lint filter of adhering lint can be initiated automatically, generally with the aid of a control device of the dryer.
  • a cleaning requirement is not explicitly determined, but a user is requested to clean the lint filter after a certain period of use of the dryer or the internal cleaning of the lint filter is automatically carried out with the aid of the control device.
  • a first controllable closure device for example a flap
  • a second controllable closure device is arranged in the supply air duct.
  • the recirculating air duct is preferably configured to allow a diversion of from about 30% to about 50% by volume of a process airflow in the process air duct after exit from the drying chamber.
  • the invention also relates to a method for operating a dryer with a drying chamber for the objects to be dried, a supply air duct, a process air duct in which there is a heater for heating the process air and the heated process air are guided by means of a blower over the objects to be dried and can be guided via an exhaust duct to the exhaust air outlet, wherein the process air duct at a diversion in a recirculating air duct for heating and an exhaust duct, which leads to the exhaust air, divides, and arranged in the recirculation air duct an internally and / or externally cleanable lint filter and the recirculation air duct itself combined with the supply air duct before the heating.
  • the cleanable lint filter is cleaned with a cleaning device.
  • the lint filter is preferably cleaned with a cleaning device comprising a stripping device.
  • a cleaning device comprising a stripping device.
  • lintings located on the lint filter are advantageously stripped off by means of the stripping device and conveyed by the process air through the exhaust air duct.
  • the fluff are conveyed through the exhaust duct via the exhaust air outlet in a storage room of the dryer. This is especially because the amount of fluff removed when using the aforementioned lint filter is relatively low.
  • about 30% by volume up to about 50% by volume of a process air stream in the process air duct is led out of the drying chamber into the recirculating air duct after the exit.
  • the drum inlet temperature may remain within the allowable range.
  • the air flow of the exhaust air, the circulating air and / or the supply air can be regulated, for example by using a first controllable closure device in the circulating air duct and / or a second controllable closure device in the supply air duct.
  • the first and / or second closure device may be a flap whose position may be changed from a fully open position to a fully closed position.
  • the amount of supply air can be controlled by the second controllable closure device in the supply air duct so that the supply of supply air is stopped and is operated only with circulating air as process air.
  • exhaust air, supply air and / or refrigerant are each conducted through the corresponding heat exchangers in a crossflow or countercurrent process.
  • the dryer according to the invention has the advantage that the reliability is significantly increased with improved energy efficiency in the recirculation mode.
  • the cleaning of the lint filter can be done in a simple and efficient way.
  • condensate produced in embodiments in the exhaust duct can be reduced and the lint removal can be improved.
  • the in Fig. 1 shown dryer 1 has a drum rotatable about a horizontal axis as a drying chamber 3, are mounted within which driver 4 for moving laundry during a drum rotation.
  • Process air is conducted by means of a blower 12 via an electric heater 11, through a drum 3, in a process air duct 2.
  • the process air channel 2 is supplied via a supply air duct 15 room air or sucked in by the blower 12.
  • the moist, warm process air is split at a branch 19 into a circulating air flow in a recirculating air duct 14 and into an exhaust air flow in an exhaust air duct 13.
  • the exhaust duct 13 is an air-to-air heat exchanger 32, in which the process air (here: exhaust air) is cooled and performed after condensation of the moisture contained in it to the exhaust outlet 16.
  • a lint filter 20 In the circulating air channel, at a distance from the branch 19, there is a lint filter 20.
  • rinsing liquid can be passed to the lint filter 20 via a rinsing line 26 for cleaning lint filter 20.
  • lint adhering to the lint filter 20 can be rinsed off.
  • the lint containing used rinsing liquid can pass through a closable outlet opening 22 in the process air duct in a collecting container 21 for the used rinsing liquid, from where they are at the in Fig. 1 shown embodiment is passed through a flushing water outlet 27 further into a condensate pan 17, which is also used for collecting accumulating in the air-to-air heat exchanger 32 condensate.
  • heated air from the heater 11 is heated from the rear, i. from the opposite side of a door 5 of the drum 3, passed through the perforated bottom in the drum 3, comes there with the laundry to be dried in contact and flows through the filling opening of the drum 3 to a lint filter 6 within a closing the filling opening door fifth Subsequently, the process air flow in the door 5 is deflected downward.
  • the process air is essentially supplied in an exhaust air duct 13 to an air-to-air heat exchanger 19, in which the warm, moisture-laden process air is cooled and then conducted to the exhaust air outlet 16.
  • the separated moisture is collected in a condensate pan 17, from where it can be removed, for example, by pumping it into a condensate tank, for which purpose, for example, the reservoir 25 for flushing liquid can be used.
  • room air supplied to the dryer 1 is used in the air-air heat exchanger 32 via the supply air duct 15.
  • This supply air is heated by the warm, laden with moisture process air and then before entering the drum 3 by means of the electric heater 11.
  • a portion of the exiting from the drum 3 warm, laden with moisture process air is diverted into a recirculating air duct 14 and passed through the electric heater 11 in turn into the drum 3.
  • the branched process air from the circulating air duct 14 and the supply air preheated in the air-air heat exchanger 32 are combined in front of the electric heater 11.
  • the air flow in the recirculating air channel 14 can by a first controllable closure device 37 and the supply air flow through a second controllable closure device 18 (for example, in each case a flap) are regulated.
  • Fig. 2 shows a vertical section through a dryer according to a second embodiment, in which the lint filter 20 is located at the junction 19 of the circulating air duct 14 from the process air duct 2 in the recirculating air duct 14 and heat recovery takes place by means of a heat pump.
  • the warm, laden with moisture process air is passed into the evaporator 33 of a heat pump circuit 33,34,35,36.
  • the evaporator 33 thus forms the heat sink 33.
  • the cooled process air is supplied in the exhaust duct 13 via the exhaust air outlet 16 of the room air.
  • the vaporized in the evaporator 33 refrigerant of the heat pump is passed through a compressor 37 to the condenser 34.
  • the condenser 34 which is the heat source 34
  • the refrigerant liquefies with heat release to the air flowing in the supply air duct 15 process air.
  • the now in liquid form refrigerant is again passed through a throttle 36 to the evaporator 33, whereby the refrigerant circuit, which in the present case defines the heat transport device comprising the compressor 37 and the throttle 36 and the corresponding lines for the refrigerant is closed.
  • a portion of the exiting from the drum 3 warm, laden with moisture process air is diverted into the recirculating air duct 14 and passed through the heater 11 in turn into the drum 3.
  • the lint filter 20 is located at the junction 19 of the circulating air duct 14 from the process air duct 2.
  • a stripping device 23 is arranged with the automatically or by a user of the dryer causes a cleaning of the lint filter 20 of adhering fluff takes place. Since the lint filter 20 is located at the branch 19, fluff removed from the lint filter 20 can be disposed of via the exhaust air outlet 16 by means of the exhaust air in the exhaust duct 19.
  • the drum 3 is at the in Fig. 1 and Fig. 2 shown embodiments at the rear bottom by means of a pivot bearing and front mounted by means of a bearing plate 7, the drum 3 rests with a brim on a sliding strip 8 on the bearing plate 7 and is held at the front end.
  • the control of the condensation dryer takes place in each case via a control device 10, which can be controlled by the user via an operating unit 9.
  • a display device 24 can indicate different states of dryer 1, in particular also a cleaning requirement of lint filter 20 and / or lint filter 6.
  • Fig. 3 shows an enlarged section of a dryer, in which the area around the lint filter 20 including a stripping device 23 is shown in greater detail.
  • the process air coming from the drum 3 flows partly through the recirculating air duct 14 and partly through the exhaust air duct 13.
  • the lint filter 20 which is provided with a stripping device 23.
  • flushing agent for example condensate
  • a rinsing line 26 is sprayed onto the lint filter 20 via a rinsing line 26 in order to wash away lint located there.
  • the lint filter 20 is cleaned by the scraping device 23.
  • the used rinse liquid passes through a closable drain opening 22 for rinsing liquid in a collecting container 21.
  • the used rinse liquid via a flushing water outlet 27 in a in Fig. 3 not shown sewer system disposed of or first in an in Fig. 3 not shown condensate tray are transported, from which they can be pumped, for example, in the memory 25.
  • Fig. 3 11 means a heater, 15 a supply air inlet, 16 the exhaust air outlet, 18 a second controllable closure device for the control of supply air and 28 an air guide member which is shaped so that it directs the coming of the drum 3 process air to the lint filter 20 to to support the replacement of the lint.
  • Fig. 4 shows a stripping device 23 as an example of a cleaning device used in the dryer.
  • the stripping device 23 comprises a scraper 29, which is moved by means of a lifting magnet 31 and a return spring 30 over a surface of the lint filter 20.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP09176618.8A 2008-12-11 2009-11-20 Séchoir doté d'une teneur en air ambiant et son procédé de fonctionnement Active EP2196577B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008054548A DE102008054548A1 (de) 2008-12-11 2008-12-11 Trockner mit Umluftanteil sowie Verfahren zu seinem Betrieb

Publications (2)

Publication Number Publication Date
EP2196577A1 true EP2196577A1 (fr) 2010-06-16
EP2196577B1 EP2196577B1 (fr) 2016-06-29

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EP09176618.8A Active EP2196577B1 (fr) 2008-12-11 2009-11-20 Séchoir doté d'une teneur en air ambiant et son procédé de fonctionnement

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US (1) US8240064B2 (fr)
EP (1) EP2196577B1 (fr)
DE (1) DE102008054548A1 (fr)

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WO2013182405A3 (fr) * 2012-06-05 2014-05-30 Arcelik Anonim Sirketi Sèche-linge ayant un condenseur refroidi par air
WO2015101387A1 (fr) * 2013-12-30 2015-07-09 Electrolux Appliances Aktiebolag Appareil de traitement de linge ayant un agencement de lavage de filtre à peluches
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CN112833657B (zh) * 2021-01-08 2022-11-08 北京鼎驰智能环保设备有限公司 一种喷烤一体机的环保型废气净化处理装置

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EP2436831A1 (fr) * 2010-09-30 2012-04-04 Panasonic Corporation Processeur de séchage de linge
CN102560991A (zh) * 2010-09-30 2012-07-11 松下电器产业株式会社 烘干处理装置
CN102560991B (zh) * 2010-09-30 2014-08-06 松下电器产业株式会社 烘干处理装置
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WO2021058365A1 (fr) 2019-09-25 2021-04-01 BSH Hausgeräte GmbH Appareil de séchage de linge et procédé de fonctionnement d'un tel appareil
US20220136166A1 (en) * 2020-08-10 2022-05-05 Doug Frost Heat Exchange Exhaust System for Clothes Dryer

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EP2196577B1 (fr) 2016-06-29
US20100146811A1 (en) 2010-06-17
US8240064B2 (en) 2012-08-14

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