EP3527711B1 - Appareil de séchage de linge et procédé de fonctionnement d'un tel appareil - Google Patents

Appareil de séchage de linge et procédé de fonctionnement d'un tel appareil Download PDF

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Publication number
EP3527711B1
EP3527711B1 EP19154690.2A EP19154690A EP3527711B1 EP 3527711 B1 EP3527711 B1 EP 3527711B1 EP 19154690 A EP19154690 A EP 19154690A EP 3527711 B1 EP3527711 B1 EP 3527711B1
Authority
EP
European Patent Office
Prior art keywords
condensate
rinsing
pump
valve
unit
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.)
Active
Application number
EP19154690.2A
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German (de)
English (en)
Other versions
EP3527711A1 (fr
Inventor
Ralf BÖMMELS
Oliver Despang
Marcus Simon
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 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 Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP3527711A1 publication Critical patent/EP3527711A1/fr
Application granted granted Critical
Publication of EP3527711B1 publication Critical patent/EP3527711B1/fr
Active legal-status Critical Current
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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 
    • D06F58/206—Heat pump 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
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/32—Control of operations performed in domestic laundry dryers 
    • D06F58/34—Control of operations performed in domestic laundry dryers  characterised by the purpose or target of the control
    • D06F58/45—Cleaning or disinfection of machine parts, e.g. of heat exchangers or filters
    • 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
    • D06F2103/02—Characteristics of laundry or load
    • D06F2103/08—Humidity
    • 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
    • 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
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/36—Condensing arrangements, e.g. control of water injection therefor

Definitions

  • the invention relates to an appliance for drying laundry, having at least one process air system, at least one heat pump thermally coupled to the process air system, at least one condensate pan, at least one condensate tank, at least one condensate pump for pumping a liquid contained in the condensate pan into the condensate tank, at least one with flushing device connected to the condensate tank for flushing an evaporator of the heat pump and at least one flushing valve connected between the condensate tank and the flushing device.
  • the invention also relates to a method for operating an appliance for drying laundry, the appliance having at least one process air system, at least one heat pump thermally coupled to the process air system, at least one condensate pan, at least one condensate tank, at least one condensate pump for pumping a condensate pan contained in the condensate pan Liquid into the condensate tank, at least one flushing device connected to the condensate tank for flushing an evaporator of the heat pump and at least one flushing valve connected between the condensate tank and the flushing device.
  • Devices for drying laundry are known in many different configurations.
  • devices for drying laundry which enable an open or closed process air system with a drying chamber accommodating laundry to be dried and a recovery of heat from the process air flowing in the process air system.
  • the aggregate for heat recovery can be an individual heat exchanger thermally coupled to the process air system or a compressor heat pump thermally coupled to the process air system. In the latter case, heat is extracted from the exhaust air leaving the drying chamber by means of an evaporator of the heat pump and is fed back to the process air that has entered the process air system in a refrigerant circuit of the heat pump by means of a condenser of the heat pump.
  • WO 2017/125172 A1 discloses a method for operating a dryer with a heat pump and internal flushing of at least one heat exchanger, the dryer having a drum for receiving damp laundry items, a heat pump having a heat sink and a heat source as a heat exchanger, a condensate pan, a condensate tank, a condensate pump for conveying an aqueous liquid from the condensate pan to the condensate tank, a flushing device connected to the condensate tank for at least one of the heat exchangers, a blower for transporting process air in a process air duct, a control device and a counting device for registering a number of drying programs that have been carried out, the counting device can contain at least one Counter reading n i with i> 1 can detect.
  • a drying program is started.
  • the quantity M of aqueous liquid that is conveyed from the condensate pan into the condensate tank during the drying program is determined, and the determined quantity M is compared with a quantity M set intended for flushing the heat exchanger compared, the heat exchanger is flushed with the flushing device with the blower switched on if M>M set , and the count n i is reset to zero.
  • An object of the invention is to provide a more effective way of cleaning a condenser of a heat pump of an appliance for drying laundry.
  • a device for drying laundry contains at least one process air system, at least one heat pump thermally coupled to the process air system, at least one condensate pan, at least one condensate tank, at least one condensate pump for pumping a liquid contained in the condensate pan into the condensate tank, at least one connected to the condensate tank Flushing device for flushing an evaporator of the heat pump, at least one flushing valve connected between the condensate tank and the flushing device, at least one valve unit connected between the condensate pump and the condensate tank, at least one flushing unit connected to the valve unit for flushing a condenser of the heat pump and at least one control electronics for controlling the Condensate pump, the flushing valve and the valve unit, wherein the valve unit is designed such that in a first switching position, the condensate pump with the Kond ensat tank and in a second switching position connects the condensate pump to the flushing unit, and wherein the control electronics are set
  • the condensate level in the condensate pan is increased by draining liquid from the condensate tank into the condensate pan before carrying out a rinsing process on the condenser of the heat pump, whereby the condensate pump is provided with a higher condensate reservoir.
  • the invention ensures that there is a sufficient amount of condensate in the condensate pan for the flushing process. This is achieved in that the flushing valve is opened when the condensate pump is deactivated for the predetermined period of time, which ends before the valve unit is switched to the second switching position and the condensate pump is activated and thus before the flushing process effected thereby.
  • the amount of condensate transferred from the condensate container to the condensate pan can be adjusted by selecting the length of the period in which the flushing valve is opened.
  • the evaporator is flushed when the condensate is drained from the condensate tank via the flushing valve.
  • the condenser is rinsed by means of the condensate passing through the rinsing valve, for example with a continuous stream of condensate or the like, which is generated by activating the condensate pump during the rinsing process. Consequently, according to the invention, first the evaporator and then the condenser can be flushed. If no flushing of the condenser is intended, the condensate level in the condensate pan can be kept low so as not to impair the performance of the condenser by wetting the condenser with condensate.
  • a section of the process air system, the heat pump, the condensate pan, the condensate pump and the flushing device for flushing an evaporator are components of an underbody of the device.
  • the flushing valve and/or the valve unit can also be components or can be a component of the floor assembly.
  • the valve unit can be a 3/2-way valve.
  • the rinsing unit for rinsing the condenser can have at least one nozzle for forming a cleaning spray jet.
  • the control electronics can be implemented as a software implementation in existing device electronics or as a separate unit.
  • the open or closed process air system is partially formed by the drying chamber accommodating the laundry to be dried and has at least one process air fan for moving process air through process air ducts of the process air system connected in a communicating manner to the drying chamber.
  • the process air system can also have at least one process air filter, which can be connected, for example, between the drying chamber and the evaporator of the heat pump.
  • the process air system can have at least one additional electrical heating unit, which can be connected between the condenser of the heat pump and the drying chamber.
  • the heat pump is preferably directly thermally coupled to the process air system.
  • the evaporator and the condenser are thermally coupled to the process air system.
  • the heat pump can be designed as a compressor heat pump and accordingly have at least one compressor for compressing the refrigerant and an expansion unit for expanding the refrigerant.
  • the appliance for drying laundry can be designed, for example, as a tumble dryer, as a washer-dryer or as a drying cabinet.
  • the control electronics are set up to open the flushing valve once a predetermined degree of dryness of the laundry to be dried has been reached.
  • rinsing is carried out in such a section of a drying process in which less power has to be applied by the condenser for heating process air. Impairment of the performance of the condenser by its wetting with condensate during its rinsing is less relevant in this part of the drying process, compared to the case if the rinsing of the condenser were carried out at an earlier stage of the drying process, which is disadvantageously associated with a prolongation of the drying cycle Drying process and an increase in the energy consumption of the device would be connected.
  • the flushing valve can be opened as a function of another process parameter that is predetermined or recorded, for example as a function of time or controlled by a time program.
  • control electronics are set up to determine a fill level of the condensate tank from a completed control of the condensate pump and to switch the valve unit to the second switching position only when the fill level is greater than a predetermined minimum fill level value or equal to this.
  • the control electronics can, for example, determine the fill level of the condensate tank by controlling the condensate pump and by internally evaluating the pumping duration or the success of the pumping.
  • the control electronics can compare the determined fill level with the specified minimum fill level value and only switch the valve unit to the second switch position if the comparison shows that the fill level is greater than or equal to the specified minimum fill level value.
  • the appliance having at least one process air system, at least one heat pump thermally coupled to the process air system, at least one condensate pan, at least one condensate tank, at least one condensate pump for pumping a liquid contained in the condensate pan into the condensate tank, at least one flushing device connected to the condensate tank for flushing an evaporator of the heat pump and at least one flushing valve connected between the condensate tank and the flushing device, a condenser of the heat pump is flushed via a flushing unit during a drying process carried out with the device, in that the flushing unit has a Valve unit is connected in the second switching position with the condensate pump by controlling the condensate pump and the valve unit via an electronic control system, with the valve unit in their first switching position, the condensate pump and the condensate tank can also be connected, with at least part of a liquid contained in the condensate tank
  • the method can be carried out with the device according to one of the above-mentioned configurations or a combination of at least two of these configurations.
  • the flushing valve is opened once the laundry to be dried has reached a predetermined degree of dryness.
  • a control that has taken place becomes the condensate pump determines a fill level of the condensate tank and the part of the liquid contained in the condensate tank via the open flush valve exclusively then drained into the condensate pan when the fill level is greater than or equal to a predetermined minimum fill level value.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of a device 1 according to the invention for drying laundry.
  • the device 1 has a device housing 2 in which a closed process air system 3 with a drying chamber 4 (not shown) that accommodates laundry to be dried is arranged.
  • the process air system 3 has a process air fan 5, which can be activated by means of control electronics 6 of the device 1 to carry out a drying process.
  • the device 1 has a heat pump 7 which is thermally coupled to the process air system 3 and is designed as a compressor heat pump.
  • the heat pump 7 has a condenser 8 that heats the process air flowing in the process air system 3, an evaporator 9 that cools and dehumidifies the process air exiting the drying chamber 4, a compressor 10, an expansion unit 11 and refrigerant lines 12 that connect these components of the heat pump 7 to one another, whereby a refrigerant circuit of the heat pump 7 is formed.
  • the device 1 has a condensate pan 13 arranged below the condenser 8 and the evaporator 9 , a condensate tank 14 , a condensate pump 15 for pumping a liquid contained in the condensate pan 13 into the condensate tank 14 .
  • the condensate pump 15 is arranged on a condensate line 16 .
  • the device 1 has a flushing device 17 connected to the condensate tank 14 Flushing of the evaporator 9 and a flushing valve 18 connected between the condensate tank 14 and the flushing device 17 .
  • the device 1 has a valve unit 19 connected between the condensate pump 15 and the condensate tank 14 and a rinsing unit 20 connected to the valve unit 19 for rinsing the condenser 8 .
  • the valve unit 19 is designed in such a way that in a first switch position it connects the condensate pump 15 to the condensate tank 14 and in a second switch position it connects the condensate pump 15 to the flushing unit 20 .
  • the control electronics 6 are set up to control the condensate pump 15 , the flushing valve 18 and the valve unit 19 .
  • the control electronics 6 are set up to control the condensate pump 15, the flushing valve 18 and the valve unit 19 in such a way that before the valve unit 19 is switched to the second switch position and the condensate pump 15 is activated, the flushing valve 18 is open for a predetermined period of time when the condensate pump 15 is deactivated which ends before the valve unit 19 is switched into the second switching position and the condensate pump 15 is activated.
  • the control electronics 6 can be set up to open the flushing valve 18 once a predetermined degree of dryness of the laundry to be dried has been reached. Alternatively or in addition, the control electronics 6 can be set up to determine the fill level of the condensate tank 14 from a completed control of the condensate pump 15 and to switch the valve unit 19 to the second switch position only when the fill level is greater than or equal to a predetermined minimum fill level.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Drying Of Solid Materials (AREA)

Claims (6)

  1. Appareil (1) pour le séchage de linge, comprenant au moins un système d'air traité (3), au moins une pompe à chaleur (7) thermiquement couplée au système d'air traité (3), au moins un bac à condensats (13), au moins un récipient pour les condensats (14), au moins une pompe à condensat (15) destinée au refoulement dans le récipient pour les condensats (14) d'un liquide contenu dans le bac à condensats (13), au moins un dispositif de vidange (17) relié au récipient pour les condensats (14) destiné à la vidange de l'évaporateur (9) de la pompe à chaleur (7) et au moins une vanne de vidange (18) montée entre le récipient pour les condensats (14) et le dispositif de vidange (17), caractérisé par au moins un ensemble vanne (19) monté entre la pompe à condensat (15) et le récipient pour les condensats (14), au moins un ensemble vidange (20) relié à l'ensemble vanne (19) pour la vidange d'un liquéfacteur (8) de la pompe à chaleur (7), et au moins une électronique d'amorce (6) pour amorcer la pompe à condensat (15), la vanne de vidange (18) et l'ensemble vanne (19), l'ensemble vanne (19) étant réalisé de façon que, dans une première position d'enclenchement, la pompe à condensat (15) relie le récipient pour les condensats (14) et, dans une deuxième position d'enclenchement, la pompe à condensat (15) relie l'ensemble vidange (20), et l'électronique d'amorce (6) servant à amorcer la pompe à condensat (15), la vanne de vidange (18) et l'ensemble vanne (19) de manière à, avant le passage de l'ensemble vanne (19) dans la deuxième position, et avant l'activation de la pompe à condensat (15), ouvrir la vanne de vidange (18) quand la pompe à condensat (15) est désactivée pour une durée prédéfinie pendant un processus de séchage effectué par l'appareil (1), lequel s'arrête avant le passage de l'ensemble vanne (19) dans la deuxième position d'enclenchement et l'activation de la pompe à condensat (15).
  2. Appareil (1) selon la revendication 1, caractérisé en ce que l'électronique d'amorce (6) sert à ouvrir la vanne de vidange (18) dès que le linge à sécher a atteint un degré de séchage prédéfini.
  3. Appareil (1) selon la revendication 1 ou 2, caractérisé en ce que l'électronique d'amorce (6) sert à détecter, sur base de l'amorce consommée de la pompe à condensat (15), un état de remplissage du récipient de condensat (14), et à ne faire passer alors l'ensemble vanne (19) en deuxième position d'enclenchement que quand le niveau de remplissage est égal ou supérieur à une valeur minimale prédéfinie du niveau de remplissage.
  4. Procédé de fonctionnement d'un appareil (1) destiné au séchage de linge, dans lequel l'appareil (1) comprend au moins un système d'air traité (3), au moins une pompe à chaleur (7) thermiquement couplée au système d'air traité (3), au moins un bac à condensats (13), au moins un récipient pour les condensats (14), au moins une pompe à condensat (15) destinée au refoulement dans le récipient pour les condensats (14) d'un liquide contenu dans le bac à condensats (13), au moins un dispositif de vidange (17) relié au récipient pour les condensats (14) destiné à la vidange de l'évaporateur (9) de la pompe à chaleur (7) et au moins une vanne de vidange montée entre le récipient pour les condensats (14) et le dispositif de vidange (17), caractérisé en ce qu'un liquéfacteur (8) de la pompe à chaleur (7) est vidangé pendant un processus de séchage réalisé par l'appareil (1) et ce, par un ensemble vidange (20) en reliant l'ensemble vidange (20) par un ensemble vanne (19) dans la deuxième position d'enclenchement de celui-ci, à la pompe à condensat (15) par le biais de l'amorce de la pompe à condensat (15) et de l'ensemble vanne (19) par une électronique d'amorce (6), la pompe à condensat (15) et le récipient de condensat pouvant en outre être reliés par l'ensemble vanne (19) en sa première position d'enclenchement et en ce que, avant un passage de l'ensemble vanne (19) en deuxième position d'enclenchement et ainsi avant la vidange du liquéfacteur (8) par le biais de l'ensemble vidange (20), au moins une partie d'un liquide contenu dans le récipient de condensat (14) est évacué dans le bac à condensats (13) par la vanne de vidange (18) ouverte par l'amorce effectuée par l'électronique d'amorce (6).
  5. Procédé selon la revendication 4, caractérisé en ce que la vanne de vidange (18) s'ouvre dès que le linge à sécher a atteint un degré de séchage prédéfini.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que d'une amorce consommée de la pompe à condensat (15) un niveau de remplissage du récipient de condensat (14) est détecté et la partie du liquide contenu dans le récipient de condensat (14) n'est ensuite évacuée dans le bac à condensats (13) par la vanne de vidange (18) ouverte, que quand le niveau de remplissage est égal ou supérieur à une valeur minimale prédéfinie du niveau de remplissage.
EP19154690.2A 2018-02-16 2019-01-31 Appareil de séchage de linge et procédé de fonctionnement d'un tel appareil Active EP3527711B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102018202385.9A DE102018202385B4 (de) 2018-02-16 2018-02-16 Gerät zum Trocknen von Wäsche und Verfahren zum Betreiben eines solchen Geräts

Publications (2)

Publication Number Publication Date
EP3527711A1 EP3527711A1 (fr) 2019-08-21
EP3527711B1 true EP3527711B1 (fr) 2022-08-10

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Country Status (4)

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EP (1) EP3527711B1 (fr)
CN (1) CN110158293B (fr)
DE (1) DE102018202385B4 (fr)
PL (1) PL3527711T3 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007016074A1 (de) * 2007-04-03 2008-10-09 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zum Reinigen eines Bauteiles, insbesondere eines Verdampfers einer Kondensatoreinrichtung sowie Wasch- oder Wäschetrockner mit einer solchen Vorrichtung
DE102007052835A1 (de) * 2007-11-06 2009-05-07 BSH Bosch und Siemens Hausgeräte GmbH Verfahren und Vorrichtung zum Reinigen eines Bauteiles, insbesondere eines Verdampfers einer Kondensatoreinrichtung sowie Wasch- oder Wäschetrockner mit einer solchen Vorrichtung
DE102008026788A1 (de) * 2008-06-04 2009-12-10 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Reinigen des Wärmetauschers eines Trockners
DE102009001548A1 (de) 2009-03-13 2010-09-16 BSH Bosch und Siemens Hausgeräte GmbH Wäschetrocknungsgerät mit einem innerhalb eines Prozessluftkreislaufs angeordneten Flusensieb und Verfahren zum Betreiben des Wäschetrocknungsgeräts
KR101192047B1 (ko) * 2009-11-30 2012-10-17 위니아만도 주식회사 의류건조기
US20120005912A1 (en) * 2010-07-08 2012-01-12 Lee Yongju Clothes dryer
JP5942098B2 (ja) * 2011-12-20 2016-06-29 パナソニックＩｐマネジメント株式会社 衣類乾燥機および衣類乾燥機の蒸発器の洗浄方法
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
CN107641947A (zh) * 2016-07-20 2018-01-30 青岛海尔洗衣机有限公司 热泵换热***、热泵洗干一体机或干衣机、自动清洗方法
CN106868825B (zh) * 2017-02-06 2019-10-25 无锡小天鹅电器有限公司 干衣机及其清洗控制方法

Also Published As

Publication number Publication date
CN110158293A (zh) 2019-08-23
DE102018202385B4 (de) 2023-03-02
PL3527711T3 (pl) 2022-11-07
DE102018202385A1 (de) 2019-08-22
CN110158293B (zh) 2022-07-05
EP3527711A1 (fr) 2019-08-21

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