WO2009095316A1 - Dispositif de séchage par condensation comportant une cuve et un contenant de condensat et procédé d'utilisation du dispositif - Google Patents

Dispositif de séchage par condensation comportant une cuve et un contenant de condensat et procédé d'utilisation du dispositif Download PDF

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Publication number
WO2009095316A1
WO2009095316A1 PCT/EP2009/050463 EP2009050463W WO2009095316A1 WO 2009095316 A1 WO2009095316 A1 WO 2009095316A1 EP 2009050463 W EP2009050463 W EP 2009050463W WO 2009095316 A1 WO2009095316 A1 WO 2009095316A1
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WO
WIPO (PCT)
Prior art keywords
condensate
process air
heat exchanger
air
dryer
Prior art date
Application number
PCT/EP2009/050463
Other languages
German (de)
English (en)
Inventor
Klaus Grunert
Original Assignee
BSH Bosch und Siemens Hausgeräte 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 Hausgeräte GmbH filed Critical BSH Bosch und Siemens Hausgeräte GmbH
Publication of WO2009095316A1 publication Critical patent/WO2009095316A1/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 
    • D06F58/24—Condensing arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/58—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to condensation, e.g. condensate water level

Definitions

  • the invention relates to a condensation dryer with condensate tray and container and a preferred method for its operation.
  • a tumble dryer whose operation is based on the condensation of the evaporated by means of warm process air moisture from the laundry (condensation dryer, hereinafter abbreviated as "dryer") is air (so-called process air) using a fan via a heater in a wet laundry containing
  • process air absorbs moisture from the laundry items and is fed into a heat exchanger, which is usually preceded by a lint filter .
  • the moist process air is cooled, so that the inside of the heat exchanger is cooled
  • the condensed water is then usually collected in a suitable container and the cooled and dried air either led to the heating and then to the drum (circulating air dryer) or led to the outside (exhaust air dryer).
  • the deposited lint is one
  • the heat exchangers are removable, especially in the case of air-to-air heat exchangers, so that they can be removed from the condensation dryer for cleaning and after removal of adhering lint, for example by rinsing with a rinsing liquid such as water, can be re-used in the dryer.
  • a heat exchanger the evaporator of a heat pump is used, since the components of a heat pump usually firmly connected to each other and can not be removed reversibly from the condensation dryer.
  • the condensate accumulating in the heat exchanger is first collected in a condensate tray in the underbody and from there pumped to a sump (hereafter referred to as a "condensate container"), which is usually located in the area of a control panel generally filled by a user of the
  • Condensation dryer be emptied. If this does not happen, condensate formed during further drying processes can be removed from the condensate tank via a
  • the user is generally visually or acoustically indicated that the condensate tank must be emptied.
  • the level sensor is in known condensation dryers in the so-called pump chamber, which is separated from the process air duct usually by a water mask.
  • the level of the condensate is therefore measured against atmospheric pressure.
  • there is a negative pressure which can often give up to 20 mm higher condensate level compared to the situation in the pump chamber.
  • the condensate level in the condensate tray is only indicated indirectly and inaccurately.
  • EP 1 816 252 A1 describes an arrangement of a condensate container in a domestic tumble dryer and a sensor system therefor, comprising a first sensor for controlling the insertion of a condensate container into a receiving space and a contains second sensor for the detection of a limit level of removable for its emptying, canister-shaped condensate container.
  • at least one of the sensors is a magnetically influenceable switch which is part of a switching system which comprises a magnetically influenceable switching contact and a magnet.
  • the switch contact is fixed in the tumble dryer, namely mounted within the feed opening.
  • DE 43 00 694 C2 describes a clothes dryer with a condensing device and a condensate collecting tank, from which the condensate is fed by means of a pump via a line to a removable receptacle or a surrounding tub, wherein the collecting vessel or the tub via a Drain line is connected to the condensate collection tank.
  • a level controller when an upper limit in the condensate collection tank is reached, ensures that the drying process is interrupted by switching off the dryer heating via a level switch.
  • the level controller is part of a system which, in conjunction with a drainage delay device in a drain line of the removable collecting vessel, is intended to detect the nature of a disturbance which may be present in a condensate management system.
  • DE 37 38 031 C2 describes a method and an apparatus for removing lint from a trained as a heat exchanger condensate separator of a clothes dryer in which the process air passed through air duct chambers and the resulting condensate collected in a container and discharged from there via a riser or is pumped into a higher in the dryer and removable condensate collection tank. At least one part of the collected condensate is flushed during a time-limited program section at least one inner surface of the process air duct.
  • the object of the present invention was therefore to provide a condensation dryer with a condensate tray and a condensate container, which allows improved monitoring of a condensate level.
  • the solution to this problem is achieved by this invention by a condensation dryer and the method with the features of the respective independent claim.
  • Preferred embodiments of the condensation dryer according to the invention and the method are listed in corresponding dependent claims.
  • the invention thus relates to a condensation dryer with a drying chamber for objects to be dried, a process air duct in which there is a heater for heating process air, a heat exchanger for cooling the process air after passing through the drying chamber and a blower for the transport of the process air Condensate tray, a condensate tank and a controller, wherein in the condensate tray in contact with the process air in the process air duct, a level sensor is arranged.
  • a condensate tray is here understood to mean a three-dimensional body which is located below the heat exchanger and which can collect the condensate produced during the heat exchange.
  • a condensate container is understood here to mean a vessel into which the condensate initially collected in the condensate tray is conveyed to the collection.
  • the fill level sensor to be used is not limited. According to the invention, it has proved to be advantageous to use a device comprising a reed contact as fill level sensor.
  • a permanent magnet float is used in conjunction with a reed contact as fill level sensor.
  • the reed contact in contact with the permanent magnetic float in the condensate tray close a circuit.
  • the condensation dryer according to the invention has an optical and / or acoustic first display means for an indication of the reaching of a predetermined maximum filling level h max in the condensate tray.
  • the invention has surprising advantages in a condensation dryer with an internal cleaning capability for the heat exchanger. It has been shown that in the pump chamber of a condensation dryer for generating evaluable signals in which a noise in a level sensor is largely excluded due to a too low level, a relatively high level is required. However, this corresponds to an even higher level in the condensate tray on the process air side.
  • a high condensate level on the process air side is very unfavorable for cleaning the heat exchanger with a rinsing liquid.
  • a rinsing liquid is passed through the heat exchanger and preferably collected in the condensate pan, from where it is pumped out.
  • the condensate tank is used as a reservoir for rinsing liquid, so that the pumping out of the rinsing liquid from the condensate tray can be carried out in the same manner as the pumping of condensate.
  • the capacity of a pump is limited, so that the largest possible absorption capacity for liquid (condensate, rinsing liquid) is required in the condensate tray.
  • the absorption capacity of the condensate tray for rinsing liquid is lower if condensate is already present in it.
  • the cleaning of the heat exchanger which is generally carried out using a rinsing liquid such as water, may be performed automatically or controllably by a user of the condensation dryer. Preferably, this can be set on the condensation dryer, whether automatically or manually a cleaning step should be performed.
  • the rinsing fluid is generally water.
  • additives such as other solvents (for example alcohols) or surface-active reagents may be added to the rinsing liquid. It is at very particularly preferred method according to the invention that the rinsing liquid comprises condensate.
  • the condensate container comprises a lower container opening and a cleaning channel between the heat exchanger and the condensate container.
  • the condensate tank is connected to the condensate tray via a condensate channel in which a pump is located.
  • the condensate tank can be fixed or removable installed in the condensation dryer. If the condensate container is removable, a user of the condensation dryer can easily use the consumed, i. Dispose of contaminated rinsing liquid with lint, etc. Otherwise, the contaminated rinsing liquid must be pumped out of the condensation dryer by a suitable device.
  • the heat exchanger is in particular an air-air heat exchanger or the evaporator of a heat pump.
  • the refrigerant of the heat pump evaporated due to the heating is supplied via a compressor to the condenser of the heat pump, where due to the condensation of the gaseous refrigerant heat is released, which is used to heat the process air before entering the drum.
  • the condensation dryer according to the invention is located in the process air duct preferably an air-air heat exchanger or an evaporator of a heat pump, particularly preferably an evaporator of a heat pump.
  • the condensation dryer according to the invention can be configured as an exhaust air dryer or as a circulating air dryer.
  • the process air In a circulating air dryer, the process air is in one closed circuit.
  • the process air In an exhaust air dryer, however, the process air is fed as so-called supply air from a supply air access to the drum and passed after leaving the drum and passage through the heat exchanger as exhaust air to an exhaust outlet.
  • process air or exhaust air and supply air
  • cooling air or process air and refrigerant of a heat pump are each passed through the corresponding heat exchangers in a crossflow or countercurrent process.
  • the invention also relates to a method for operating a condensation dryer with a drying chamber for objects to be dried, a process air duct, in which a heating for heating process air, a
  • Heat exchanger for cooling the process air after passing through the
  • Drying chamber and a blower for conveying the process air are located one
  • Condensate tray a condensate tank, a controller and arranged in the condensate tray in contact with the process air in the process air duct
  • Level sensor where the level sensor measures a level of the condensate.
  • the invention is particularly advantageous when a cleaning of the heat exchanger of the condensation dryer is carried out with a rinsing liquid.
  • the heat exchanger is cleaned with a rinsing liquid.
  • the rinsing liquid is passed from the condensate tank in the heat exchanger, then collected in the condensate pan and finally pumped back into the condensate tank.
  • a cleaning program for the heat exchanger is not particularly limited as long as a sufficient cleaning of the heat exchanger is achieved.
  • the cleaning programs in terms of quantity, temperature and the Distinguish flow rate of the rinsing liquid.
  • the rinsing liquid is preferably returned after cleaning of the heat exchanger in the reservoir.
  • the cleaning program may specify that such a cycle is run more than once.
  • the rinsing liquid is pumped out of the condensate pan directly through a suitable pump and disposed of.
  • the level h of the condensate is compared with a predetermined maximum value h max .
  • h max a predetermined maximum value
  • an open lower container opening is closed and / or a drying process is interrupted.
  • the closing of the open lower container opening and / or the termination of the drying process by an optical / or acoustic second display means are displayed.
  • the exhaust air dryer according to the invention and the method according to the invention for its operation have the advantage that the condensate level in a condensation dryer can be determined accurately and quickly.
  • the invention thus enables safe operation of a condensation dryer without condensate can escape. This is especially true if a cleaning of the heat exchanger by a rinsing liquid is provided in the condensation dryer.
  • the invention is particularly advantageous in a condensation dryer with a heat pump, since the evaporator is generally firmly connected to the other components of the heat pump.
  • the condensation dryer according to the invention makes it possible to carry out a flushing of the heat exchanger with condensate, while at the same time monitoring the level in the condensate tray.
  • FIGS. 1 to 3 show a vertical section through a condensation dryer, which is designed as a circulating air dryer and has as a heat exchanger, the evaporator of a heat pump.
  • Figure 2 shows a vertical section through a condensation dryer, which is designed as a vented dryer and has a heat exchanger air-to-air heat exchanger.
  • Figure 3 shows a vertical section through a condensation dryer, which is designed as a circulating air dryer and has a heat exchanger air-to-air heat exchanger.
  • FIGS. 1 to 3 the arrows with the arrowhead filled in indicate the flow direction of the process air.
  • Figure 1 shows a vertical section through a condensation dryer 1, which is designed as a circulating air dryer and as a heat exchanger 15, the evaporator of a heat pump 12,13,14,15.
  • the dryer 1 shown in FIG. 1 has a drum, which is rotatable about a horizontal axis, as a drying chamber 3, within which drivers 25 are attached for moving laundry during a drum rotation.
  • a drum which is rotatable about a horizontal axis, as a drying chamber 3, within which drivers 25 are attached for moving laundry during a drum rotation.
  • Process air duct 2 is process air by means of a blower 6 via an electrical
  • the heated process air then passes into the drum 3, where in Fig. 1, not shown wet laundry items moisture is removed.
  • Heat transfer to the process air returns to the liquid state.
  • 14 means a throttle valve.
  • the moist, warm process air is led to the evaporator 15 of a heat pump 12, 13, 14, 15, where it is cooled.
  • the refrigerant of the heat pump evaporated in the evaporator 15 is conducted via a compressor 13 to the condenser 12.
  • the condenser 12 the refrigerant liquefies under heat to the flowing in the process air duct cooled and dehumidified process air.
  • the liquid then present in liquid form is passed via a throttle valve 14 in turn to the evaporator 15, whereby the refrigerant circuit is closed.
  • the resulting condensate in the evaporator 15 is collected in a condensate pan 17 and pumped by means of a condensate pump 28 in a condensate channel 18 in a condensate tank 19.
  • a liquid 29 in the condensate container 19 is used as rinsing liquid for the evaporator 15.
  • the rinsing liquid 29 in this case comprises condensate from the condensate tray 17 and optionally additionally filled liquid.
  • the additionally charged liquid is generally water, to which cleaning additives and / or other liquids may be added.
  • a level sensor 1 which is designed here as a reed contact in conjunction with a permanent magnetic float.
  • the evaporator 15 is cleaned by means of the rinsing liquid 29 present in the condensate container 19.
  • the rinsing liquid 29 comprises condensate which had previously accumulated in the evaporator 15 and had been pumped from a condensate tray 17 by means of a pump 28 via a condensate channel 18 into the condensate container 19.
  • the lower container opening 21 is opened and the rinsing liquid 29 passed through a cleaning channel 20 in the evaporator 5, collected in the condensate pan 17 and pumped back into the condensate tank 19. This cycle can be repeated if necessary.
  • the drum 3 is mounted in the embodiment shown in Fig. 1 at the rear bottom by means of a pivot bearing and front 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 so held at the front end.
  • the control of the exhaust air dryer via a control device 10, which can be controlled by the user via an operating unit 9.
  • the fan 6 and the drum 3 are driven by the motor 30.
  • Figure 2 shows a vertical section through a condensation dryer 1, which is designed as a vented dryer and has a heat exchanger air-to-air heat exchanger 5.
  • a condensation dryer 1 which is designed as a vented dryer and has a heat exchanger air-to-air heat exchanger 5.
  • the same reference numerals mean the same components that - unless otherwise stated - perform the same functions as described in Fig. 1.
  • an air-air heat exchanger 15 is used in the embodiment shown in Figure 2.
  • supply air is conducted from a supply air inlet 23 via an electric heater 4 by means of a blower 6 as process air, where it is heated and then fed into a drum 3 as a drying chamber. From the process air moisture is taken from in Fig. 2, not shown wet laundry.
  • heated process air from the rear ie from the side of the drum 3 opposite a door 22, is passed through the perforated bottom into the drum 3 where it comes into contact with the laundry to be dried and flows through the filling opening of the drum 3 to a lint filter 16 within the filling opening closing door 22.
  • the process air flow is deflected in the door 22 down and directed to the air-to-air heat exchanger 5.
  • the moisture absorbed by the process air from the items of laundry condenses there and is collected in the condensate tray 17.
  • a level sensor 11 which is designed here as a reed contact in conjunction with a permanent magnetic float.
  • the air-air heat exchanger 5 is cleaned with a rinsing liquid 29 present in the condensate container 19.
  • the rinsing liquid 29 in this case comprises condensate, which had previously accumulated in the air-to-air heat exchanger 5 and pumped from the condensate pan 17 by means of a pump 28 via a condensate channel 18 in the condensate tank 19.
  • the lower container opening 21 is opened and the rinsing liquid 29 is passed through a cleaning channel 20 into the air-air heat exchanger 5.
  • the rinsing liquid 29 is collected in the condensate pan 17 and pumped back into the condensate tank 19. This cycle can be repeated if necessary.
  • the cooled and dehumidified process air is conducted as exhaust air via an exhaust air outlet 24 into the installation space of the condensation dryer 1.
  • the fan 6 and the drum 3 are driven by the motor 30.
  • Figure 3 shows a vertical section through a condensation dryer, which is designed as a circulating air dryer and has a heat exchanger air-to-air heat exchanger.
  • the air-air heat exchanger 5 is cleaned with a rinsing liquid 29 as shown in FIG.
  • the not separately explained for Fig. 3 parts of the condensation dryer correspond to the parts described for Fig. 2 and their functions.
  • the fan 6, the cooling fan 27 and the drum 3 are driven by the same motor 30, wherein the fan 6 and the cooling fan 27 are located on opposite sides of the motor 30.

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

Abstract

L'invention concerne un dispositif de séchage par condensation (1) comportant une chambre de séchage (3) pour des objets à sécher; un canal d'air de traitement (2) contenant un chauffage (4) pour chauffer l'air de traitement, un échangeur thermique (5, 15) pour refroidir l'air de traitement après passage à travers la chambre de séchage (3), et une soufflerie (6) pour le transport de l'air de traitement; une cuve de condensat (17); un contenant de condensat (19); et une commande (10). Un capteur de niveau (11) se trouvant en contact avec l'air de traitement dans le canal d'air de traitement (2) est disposé dans la cuve de condensat (17). L'invention concerne également un procédé préféré d'utilisation de ce dispositif de séchage par condensation.
PCT/EP2009/050463 2008-01-28 2009-01-16 Dispositif de séchage par condensation comportant une cuve et un contenant de condensat et procédé d'utilisation du dispositif WO2009095316A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008006349.5 2008-01-28
DE102008006349A DE102008006349A1 (de) 2008-01-28 2008-01-28 Kondensationstrockner mit Kondensatwanne und -behälter sowie Verfahren zu seinem Betrieb

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WO2009095316A1 true WO2009095316A1 (fr) 2009-08-06

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WO (1) WO2009095316A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012005533A3 (fr) * 2010-07-08 2012-08-30 Lg Electronics Inc. Sèche-linge
DE102012209826A1 (de) 2012-06-12 2013-12-12 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Pumpe sowie Verfahren zu seinem Betrieb

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2314757B1 (fr) * 2009-10-20 2015-04-22 Candy S.p.A. Appareil domestique doté d'un système amélioré de refroidissement du condensateur.
DE102010030161A1 (de) * 2010-06-16 2011-12-22 BSH Bosch und Siemens Hausgeräte GmbH Kondensatbehälter für ein Kondensationswäschetrocknungsgerät, Kondensationswäschetrocknungsgerät und Verfahren zum Betreiben eines Kondensationswäschetrocknungsgeräts
EP2508668B1 (fr) * 2011-04-08 2019-06-05 Candy S.p.A. Système de détection de niveau de condensat pour sèche-linge et sèche-linge
EP2610395B1 (fr) * 2011-12-28 2019-07-03 Electrolux Home Products Corporation N.V. Réservoir pour liquides pour appareil domestique doté d'une unité d'indication du niveau de liquide
FR3006335B1 (fr) * 2013-06-03 2015-10-30 Fagorbrandt Appareil de sechage du linge comprenant un dispositif de determination du niveau d'eau
DE102014209732A1 (de) 2014-05-22 2015-11-26 BSH Hausgeräte GmbH Reinigen wasserführender Komponenten eines Haushaltsgeräts
DE102014218253A1 (de) * 2014-09-11 2016-03-17 BSH Hausgeräte GmbH Haushaltsgerät zum Trocknen von Wäsche, aufweisend einen Temperatursensor
DE102016200845A1 (de) * 2016-01-21 2017-07-27 BSH Hausgeräte GmbH Verfahren zum Betrieb eines Trockners mit einer Wärmepumpe und Spülung eines Wärmetauschers und hierfür geeigneter Trockner

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DE4212965A1 (de) * 1992-04-18 1993-10-21 Bauknecht Hausgeraete Kondenswäschetrockner
DE4300694A1 (de) * 1993-01-13 1994-07-14 Bosch Siemens Hausgeraete Wäschetrockner mit einer Kondensationseinrichtung
DE4333901C1 (de) * 1993-10-05 1995-02-09 Bauknecht Hausgeraete Wäschetrockner
EP1816252A1 (fr) * 2006-02-01 2007-08-08 BSH Bosch und Siemens Hausgeräte GmbH Agencement d'un réservoir de condensation dans un sèche-linge domestique et système de détection associé
DE102006018469A1 (de) * 2006-04-19 2007-10-25 Lare Luft- und Kältetechnik Apparate und Regelsysteme GmbH Temperatur- und Druckausgleich von Wärmetauschern in Wäschetrocknern und ähnlichen Wärmepumpensystemen

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DE4212965A1 (de) * 1992-04-18 1993-10-21 Bauknecht Hausgeraete Kondenswäschetrockner
DE4300694A1 (de) * 1993-01-13 1994-07-14 Bosch Siemens Hausgeraete Wäschetrockner mit einer Kondensationseinrichtung
DE4333901C1 (de) * 1993-10-05 1995-02-09 Bauknecht Hausgeraete Wäschetrockner
EP1816252A1 (fr) * 2006-02-01 2007-08-08 BSH Bosch und Siemens Hausgeräte GmbH Agencement d'un réservoir de condensation dans un sèche-linge domestique et système de détection associé
DE102006018469A1 (de) * 2006-04-19 2007-10-25 Lare Luft- und Kältetechnik Apparate und Regelsysteme GmbH Temperatur- und Druckausgleich von Wärmetauschern in Wäschetrocknern und ähnlichen Wärmepumpensystemen

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Publication number Priority date Publication date Assignee Title
WO2012005533A3 (fr) * 2010-07-08 2012-08-30 Lg Electronics Inc. Sèche-linge
US9752274B2 (en) 2010-07-08 2017-09-05 Lg Electronics Inc. Clothes dryer
DE102012209826A1 (de) 2012-06-12 2013-12-12 BSH Bosch und Siemens Hausgeräte GmbH Kondensationstrockner mit einer Pumpe sowie Verfahren zu seinem Betrieb

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