EP3812500A1 - Sèche-linge domestique - Google Patents

Sèche-linge domestique Download PDF

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Publication number
EP3812500A1
EP3812500A1 EP20199820.0A EP20199820A EP3812500A1 EP 3812500 A1 EP3812500 A1 EP 3812500A1 EP 20199820 A EP20199820 A EP 20199820A EP 3812500 A1 EP3812500 A1 EP 3812500A1
Authority
EP
European Patent Office
Prior art keywords
air
washer
dryer
dry air
water inlet
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.)
Pending
Application number
EP20199820.0A
Other languages
German (de)
English (en)
Inventor
Joaquin Jesus Capablo Sese
Iñaki OTERO GARCIA
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 EP3812500A1 publication Critical patent/EP3812500A1/fr
Pending 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
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—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
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/24—Condensing arrangements

Definitions

  • the present invention relates to a household washer-dryer.
  • a washer dryer For combined washing and drying of laundry, a so-called washer dryer can be used.
  • a washer-dryer is an appliance that is capable of subsequently washing and drying laundry.
  • For drying laundry with conventional dryers several drying methods are known to the applicant from his in-house experience. Vented dryers work by evacuating hot wet air to the room or outdoors. In this case, drying of the wet laundry takes place by applying an air current blown by a fan and which, when flowing through the laundry, provokes the extraction of humidity contained in said laundry.
  • the air applied to the laundry can be heated, for example, by means of an electrical resistor, and being loaded with the evaporated humidity. Then, the humid air can be discharged to the outside.
  • Air condensation dryers dry by recirculating process air and condensing the contained water in it.
  • the humidity in the air can be condensed, turning the air carrying it into dry air that can be recirculated in a closed circuit. Humidity from the humid air being thereby recovered in liquid state.
  • the dehumidification can be done with fresh air.
  • dehumidification of humid air can be carried out by means of an air-air heat exchanger in which one of the exchanging fluids is cold air from the ambient, which flows without direct contact but thermal through this heat exchanger, cooling down the humid air flow and quitting its humidity. This refrigeration air is extracted from the ambient being heated up and expelled again to the ambient after flowing through the exchanger, being propelled by an additional fan.
  • the dehumidification can be done with fresh water.
  • dehumidification of humid air can also take place by cooling with refrigeration water taken from the water supply, directly in counter flow contact with the humid air.
  • the dehumidification can be done via an air to refrigerant heat exchanger.
  • dehumidification is done by heat pump technology comprising a heat pump circuit with a compressor, a condenser and an evaporator.
  • the air current applied to the laundry to be dried is usually heated by means of the heat pump condenser and propelled by a fan.
  • the dehumidification is achieved by cooling the humid air by passing it through the cold surfaces of the heat pump evaporator.
  • the temperature difference between condenser and evaporator is produced due to compressing a refrigerant media in superheated gas state, which is able to condense by being cooled down by the dried air, then expanded and evaporated again by the humid air coming out of the drum.
  • a household washer-dryer comprises a drum for receiving laundry, an air inlet for taking in cool dry air from a surroundings of the household washer-dryer during a drying cycle, wherein the air inlet comprises a heating device for converting the cool dry air into hot dry air which is discharged into the drum by means of the air inlet, and a water inlet/air outlet for taking in hot moist air from the drum during the drying cycle, wherein the water inlet/air outlet comprises a dehumidifying device for converting the hot moist air into cool dry air which is discharged into the surroundings by means of the water inlet/air outlet.
  • the space required for the elements that are need for the drying cycle is smaller compared to a washer-dryer with a closed cycle. In this way, either the size of the drum can be increased or the size of the household washer-dryer can be reduced.
  • the household washer-dryer is an open cycle household washer-dryer.
  • "Open cycle” in this context means that the air that is used for drying the laundry does not circulate like in a closed cycle washer-dryer. In other words, the air is taken from the surroundings and is discharged back into the surroundings.
  • the drum is rotatable supported in a tub.
  • the air inlet and the water inlet/air outlet are connected to the tub.
  • the washer-dryer can perform a washing cycle and a subsequent drying cycle.
  • the term "household washer-dryer” has to be understand as a household appliance that is capable of both, washing and drying laundry.
  • the drying cycle is an open drying cycle.
  • the heating device is preferably arranged inside the air inlet.
  • the air inlet can be a duct that connects the surroundings to the tub.
  • the dehumidifying device is capable of removing water or moisture from the hot moist air leaving the drum.
  • the hot dry air takes up moisture from the laundry and leaves the drum as hot moist air.
  • the dehumidification process is done by cooling down the hot moist air. In this way, the moisture condenses when cooling down the hot moist air coming from the laundry.
  • the dehumidification device is preferably arranged inside the water inlet/air outlet.
  • the water inlet/air outlet can be a duct that connects the tub to the surroundings.
  • the term "water inlet/air outlet" in this context means that there is provided a double function.
  • the air inlet comprises a fan which forces the cool dry air through or over the heating device during the drying cycle.
  • the fan can be arranged upstream the heating device. Alternatively, the fan can be arranged downstream the heating device.
  • the fan can be a ventilator.
  • the heating device is an electrical resistor that is placed inside the air inlet.
  • a resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element.
  • the electrical resistor can be a wire coil.
  • the dehumidifying device comprises a sprinkler that generates a drizzle of fresh water that is in counterflow with the hot moist air leaving the drum during the drying cycle.
  • Counterflow in this context means that a flow direction of the drizzle and a flow direction of the hot moist air are contrary.
  • the water inlet/air outlet comprises an additional heating device for converting the cool dry air into warm dry air which is discharged into the surroundings by means of the water inlet/air outlet.
  • the additional heating device can be an additional resistor that is arranged inside the water inlet/air outlet.
  • the additional heating device is arranged downstream the dehumidifying device.
  • Downstream in this context means that seen in a flow direction of the air, the additional heating device is arranged behind the dehumidifying device.
  • the household washer-dryer further comprises a heat pump.
  • a "heat pump” comprises a condenser, an evaporator, an expansion valve and a compressor.
  • the heating device is a condenser of the heat pump, wherein the heating device is placed inside the air inlet.
  • heating device can be replaced by the term “condenser”.
  • the condenser is a heat exchanger.
  • the dehumidifying device is an evaporator of the heat pump, wherein the dehumidifying device is placed inside the water inlet/air outlet.
  • the term " dehumidifying device” can be replaced by the term “evaporator”.
  • the evaporator is a heat exchanger.
  • the compressor compresses a refrigerant which is heated up during compressing it.
  • the refrigerant condenses and transfers heat to the cool dry air sucked in from the surroundings.
  • the condensed refrigerant is supplied to the expansion valve where the liquid refrigerant is expanded and cooled down.
  • the cool refrigerant is supplied to the dehumidifying device where it evaporates and takes up heat from the hot moist air leaving the tub.
  • the hot moist air cools down and the moisture condenses so that only cool dry air is discharged into the surroundings.
  • the heat pump comprises a heat exchanger for converting the cool dry air into warm dry air which is discharged into the surroundings by means of the water inlet/air outlet.
  • the heat pump has three heat exchangers, namely the evaporator, the condenser and the afore-mentioned heat exchanger.
  • the heat exchanger is arranged downstream the dehumidifying device.
  • the cool dry air can be heated up before being discharged into the surroundings.
  • the heat exchanger is arranged inside the water inlet/air outlet.
  • the household washer-dryer can so be designed more compact.
  • the heat pump comprises an evaporator for cooling down fresh water that is delivered to the dehumidifying device.
  • the evaporator is not used to cool down the hot moist air coming from the laundry.
  • the evaporator is used to cool down the water that is delivered to the dehumidifying device.
  • the dehumidifying device is not an evaporator but a sprinkler as mentioned before.
  • the heat pump comprises a heat exchanger for converting the cool dry air into warm dry air which is discharged into the surroundings by means of the water inlet/air outlet.
  • the dehumidification device is a sprinkler.
  • the heat pump comprises a condenser in form of the heating device, the condenser for cooling the water for the dehumidification device and the heat exchanger.
  • the heat exchanger is arranged downstream the dehumidifying device.
  • Fig. 1 shows one embodiment of a washer-dryer 1A.
  • the washer-dryer 1A is a household appliance and can therefore be named household washer-dryer.
  • a "washer-dryer” in this context is to be understood as an appliance that is capable of subsequently washing and drying laundry.
  • the washer-dryer 1A is an open-cycle washer dryer. For this reason, the washer-dryer 1A can be named open-cycle washer-dryer.
  • the washer-dryer 1A has a housing 2 which encloses a tub 3.
  • the tub 3 has a load opening 4 through which laundry 5 can be placed in a rotatable drum 6.
  • the drum 6 is rotatable supported in the tub 3.
  • a motor 7 is provided for rotating the drum 6.
  • the motor 7 has a pinion 8 whereas the drum 6 has a gear 9 which engages with the pinion 8 by means of a chain 10.
  • the motor 7 can be connected to the tub 3. Between the drum 6 and the tub 3 is provided a gap 11.
  • the load opening 4 can be opened and closed by means of a door 12.
  • the door 12 is hinged to the housing 2.
  • the tub 3 has an air inlet 13.
  • the air inlet 13 can be a duct that discharges into a bellows 14 that connects the tub 3 to the housing 2.
  • the air inlet 13 is capable of sucking in fresh or cool dry air 15 from a surroundings 16 of the washer-dryer 1A.
  • the air inlet 13 has a fan 17.
  • the air inlet 13 further has a heating device 18 for heating the cool dry air 15.
  • the heating device 18 is an electrical resistor.
  • the heating device 18 turns the cool dry air 15 into hot dry air 19.
  • the tub 3 has a water outlet 20 for discharging process water 21 from the tub 3.
  • "Process water” in this context means fresh water that comprises a detergent and/or dirt that is separated from the laundry 5.
  • the water outlet 20 can be a bellows that is attached to the tub 3. Seen along a direction of gravity g, the water outlet 20 is provided at a lowest point of the tub 3.
  • the water outlet 20 is connected to a pump 22.
  • the pump 22 discharges the process water 21 into an outlet tube 23.
  • the outlet tube 23 can be connected to a sewer (not shown) or the like.
  • the tub 3 comprises a combined water inlet/air outlet 24.
  • hot moist air 25 can be discharged from the tub 3 and fresh water 26 can be discharged into the tub 3.
  • the water inlet/air outlet 24 has a dehumidifying device 27 for dehumidifying the hot moist air 25.
  • the dehumidifying device 27 is suitable for cooling down and dehumidifying the hot moist air 25. In this way, the dehumidifying device 27 can process the hot moist air 25 into cool dry air 28 that is discharged into the surroundings 16.
  • the dehumidifying device 27 can comprise a spray or sprinkler 29 that sprays the fresh water 26 and thus creates a drizzle 30 of fresh water 26.
  • the dehumidifying device 27 further comprises a feeding tube 31 for supplying the fresh water 26 and a valve 32.
  • the function of the washer-dryer 1A is as follows.
  • the laundry 5 that has to be cleaned is placed in the drum 6 and the door 12 is closed.
  • a combined washing-drying cycle is started.
  • the washing-drying cycle comprises a washing cycle and a subsequent drying cycle.
  • fresh water 26 is discharged into the tub 3 through the water inlet/air outlet 24. This can be done by means of the dehumidifying device 27. Otherwise, the fresh water 26 can be discharged into the water inlet/air outlet 24 in any other way.
  • a water supplying tube (not shown) can discharge the fresh water 26 into the tub 3 and/or the water inlet/air outlet 24.
  • the fresh water 26 dissolves a detergent that is placed in the laundry 5 or in a dispenser (not shown).
  • the motor 7 rotates the drum 6 and the process water 21 can be circulated by means of the pump 22. By the end of the washing circle, the clean laundry 5 is centrifuged by means of the motor 7 and the process water 21 is discharged into the outlet tube 23.
  • the air inlet 13 sucks in cool dry air 15 from the surroundings 16 by means of the fan 17.
  • the cool dry air 15 is processed into hot dry air 19 by means of the heating device 18.
  • the hot dry air 19 is discharged into the rotating drum 6.
  • the hot dry air 19 absorbs moisture from the wet laundry 5 and is discharged through the water inlet/air outlet 24 as hot moist air 25.
  • the hot moist air 25 is in counterflow with the drizzle 30 of fresh water 26.
  • the dehumidifying device 27 cools the hot moist air 25 down, whereupon the moisture in the hot moist air 25 condenses and flows back into the tub 3 together with the fresh water 26. From the tub 3, the moisture and the fresh water 26 used to produce the drizzle 30 are discharged as process water 21 into the outlet tube 23 by means of the pump 22. In this way, the hot moist air 25 is processed into cool dry air 28 that is discharged into the surroundings 16.
  • the drying cycle is performed till the laundry 5 has the desired dryness. The desired dryness can be detected by means of a sensor (not shown). The drying cycle is stopped and the laundry 5 can be removed from the drum 6.
  • the washer-dryer 1A sucks in cool dry air 15 from the surroundings 16 and discharges cool dry air 28 into the surroundings 16. In other words, the air does not circulate in a closed circuit.
  • the washer-dryer 1A can therefore be named as open cycle washer-dryer.
  • Fig. 2 shows another embodiment of a washer-dryer 1B.
  • the washer-dryer 1B differs from the washer-dryer 1A only in that the water inlet/air outlet 24 comprises an additional heating device 33 for heating up the cool dry air 28 downstream the dehumidifying device 27.
  • the heating device 33 heats the cool dry air 28 up to room temperature.
  • the heating device 33 turns the cool dry air 28 into warm dry air 34 that is discharged into the surroundings 16.
  • Fig. 3 shows another embodiment of a washer-dryer 1C.
  • the washer-dryer 1C differs from the washer-dryer 1A only in that the heating device 18 of the air inlet 13 is a condenser of a heat pump 35 and in that the dehumidifying device 27 of the water inlet/air outlet 24 is an evaporator of the heat pump 35.
  • the heat pump 35 comprises an expansion valve 36 and a compressor 37.
  • the heating device 18 is connected to the dehumidifying device 27 by means of a first duct 38.
  • the first duct 38 has the expansion valve 36.
  • the dehumidifying device 27 is connected to the heating device 18 by means of a second duct 39.
  • the second duct 39 has the compressor 37.
  • the compressor 37 compresses a refrigerant which is heated up during compressing it.
  • the refrigerant condenses and transfers heat to the cool dry air 15 sucked in from the surroundings 16.
  • the condensed refrigerant is supplied to the expansion valve 36 where the liquid refrigerant is expanded and cooled down.
  • the cool refrigerant is supplied to the dehumidifying device 27 where it evaporates and takes up heat from the hot moist air 25 leaving the tub 3.
  • the hot moist air 25 cools down and the moisture condenses so that only cool dry air 28 is discharged into the surroundings 16.
  • Fig. 4 shows another embodiment of a washer-dryer 1D.
  • the washer-dryer 1D differs from the washer-dryer 1C only in that the heat pump 35 comprises an additional heat exchanger 40.
  • the dehumidifying device 27 is connected to the heating device 18 by means of the second duct 39 which comprises the compressor 37.
  • the heat exchanger 40 is connected to the dehumidifying device 27 by means of a third duct 41 which comprises the expansion valve 36.
  • the heating device 18 is connected to the heat exchanger 40 by means of a fourth duct 42.
  • the heat exchanger 40 is used to heat up the cool dry air 28 before being discharged into the surroundings 16. In this way, the heat exchanger 40 processes the cool dry air 28 into warm dry air 34 leaving the washer-dryer 1D.
  • Fig. 5 shows another embodiment of a washer-dryer 1E.
  • the washer-dryer 1E differs from the washer-dryer 1A only in that the heating device 18 of the air inlet 13 is a condenser of a heat pump 35. Apart from the heating device 18 the heat pump 35 comprises an evaporator 43.
  • the heating device 18 is connected to the evaporator 43 by means of the first duct 38 which has the expansion valve 36.
  • the evaporator 43 is connected to the heating device 18 by means of the second duct 39 which comprises the compressor 37.
  • the evaporator 43 is used to cool down the fresh water 26 before it gets sprayed by means of the dehumidifying device 27.
  • the process water 21 produced during the drying cycle can be delivered to the evaporator 43 by means of the outlet tube 23 and cooled down again before being sprayed by the sprinkler 29.
  • a water circulation can be established. In this way, the consumption of fresh water 26 can be reduced.
  • Fig. 6 shows another embodiment of a washer-dryer 1F.
  • the washer-dryer 1F differs from the washer-dryer 1E only in that the heat pump 35 comprises an additional heat exchanger 40.
  • the evaporator 43 is connected to the heating device 18 by means of the second duct 39 which comprises the compressor 37.
  • the heat exchanger 40 is connected to the evaporator 43 by means of the third duct 41 which comprises the expansion valve 36.
  • the heating device 18 is connected to the heat exchanger 40 by means of the fourth duct 42.
  • the heat exchanger 40 is used to heat up the cool dry air 28 before being discharged into the surroundings 16. In this way, the heat exchanger 40 processes the cool dry air 28 into warm dry air 34 leaving the washer-dryer 1F.
  • the afore-mentioned embodiments of the washer-dryer 1A, 1B, 1C, 1D, 1E, 1F can have the following advantages. Due to the fact that an open cycle is provided, it is possible to provide a fast-drying function in a washer-dryer 1A, 1B, 1C, 1D, 1E, 1F with standard dimensions. A high simplicity for integrating the system in an existing washer-dryer configuration can be achieved. It is possible to reutilize water. This implies lower fresh water consumption during the washing cycle. It is possible to recover heat from water used in the dehumidifying process. Flexibility and adaptability of the design can be provided. Different washing and drying speed and efficiency can be devised.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP20199820.0A 2019-10-21 2020-10-02 Sèche-linge domestique Pending EP3812500A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19382915 2019-10-21

Publications (1)

Publication Number Publication Date
EP3812500A1 true EP3812500A1 (fr) 2021-04-28

Family

ID=68392913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20199820.0A Pending EP3812500A1 (fr) 2019-10-21 2020-10-02 Sèche-linge domestique

Country Status (2)

Country Link
EP (1) EP3812500A1 (fr)
CN (1) CN112760901A (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0467188A1 (fr) * 1990-07-19 1992-01-22 Bosch-Siemens HausgerÀ¤te GmbH Sèche linge avec pompe à chaleur
EP1291597A1 (fr) * 2001-09-05 2003-03-12 Esswein S.A. Procédé et appareil de séchage par circulation d'air
US20180355548A1 (en) * 2015-12-11 2018-12-13 Samsung Electronics Co., Ltd. Drying apparatus and laundry drying machine including the same

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007018787A1 (de) * 2007-04-20 2008-10-23 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betrieb eines Kondensationstrockners mit einer Wärmepumpe, sowie hierzu geeigneter Kondensationstrockner
EP2390397A1 (fr) * 2010-05-25 2011-11-30 Electrolux Home Products Corporation N.V. Procédé de fonctionnement d'un cycle de lavage et cycle de séchage successif dans une laveuse-sécheuse de linge
EP3241943B1 (fr) * 2016-05-03 2019-09-11 BSH Hausgeräte GmbH Appareil ménager comprenant un échangeur de chaleur à eau/air de processus
EP3241944A1 (fr) * 2016-05-03 2017-11-08 BSH Hausgeräte GmbH Appareil ménager équipé d'un circuit d'air de traitement

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0467188A1 (fr) * 1990-07-19 1992-01-22 Bosch-Siemens HausgerÀ¤te GmbH Sèche linge avec pompe à chaleur
EP1291597A1 (fr) * 2001-09-05 2003-03-12 Esswein S.A. Procédé et appareil de séchage par circulation d'air
US20180355548A1 (en) * 2015-12-11 2018-12-13 Samsung Electronics Co., Ltd. Drying apparatus and laundry drying machine including the same

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