EP2019162A1 - Wasch- und Trocknungsmaschine - Google Patents

Wasch- und Trocknungsmaschine Download PDF

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Publication number
EP2019162A1
EP2019162A1 EP20070425471 EP07425471A EP2019162A1 EP 2019162 A1 EP2019162 A1 EP 2019162A1 EP 20070425471 EP20070425471 EP 20070425471 EP 07425471 A EP07425471 A EP 07425471A EP 2019162 A1 EP2019162 A1 EP 2019162A1
Authority
EP
European Patent Office
Prior art keywords
washer
cooling water
drier machine
washing
drying
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
EP20070425471
Other languages
English (en)
French (fr)
Other versions
EP2019162B1 (de
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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 Candy SpA filed Critical Candy SpA
Priority to EP07425471.5A priority Critical patent/EP2019162B1/de
Publication of EP2019162A1 publication Critical patent/EP2019162A1/de
Application granted granted Critical
Publication of EP2019162B1 publication Critical patent/EP2019162B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • 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 
    • 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
    • D06F2103/28—Air properties
    • D06F2103/30—Pressure
    • 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
    • D06F2105/08—Draining of washing liquids
    • 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
    • D06F2105/10—Temperature of washing liquids; Heating means therefor
    • 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 present invention relates to a domestic washer-drier machine which provides for washing and drying the laundry.
  • Domestic washer-drier machines are known to comprise a support and housing structure, a washing tank being housed therein, which is provided with a front opening that can be closed by means of a porthole door that is hinged in front of the housing.
  • a basket is pivotally housed about a horizontal or inclined axis for the laundry to be accommodated therein to be washed and/or dried.
  • the basket also defines a front opening that is located such as to match the opening of the washing tank, in order to load/unload the laundry.
  • the washing tank is suitable to contain the washing liquid during the laundry washing steps, and to be a portion of the drying circuit during the laundry drying step.
  • a washing water delivery system is provided to be connected to the water system.
  • This washing water delivery system comprises a plurality of electrovalves which are suitable to selectively adjust the supply to a plurality of flow paths extending downstream of these electrovalves through respective compartments of a detergent tray to the washing tank.
  • a drain duct with a discharge pump being associated thereto On the bottom of the washing tank there is provided a drain duct with a discharge pump being associated thereto, which provides for the removal of the washing liquid from the tank and controls, together with the supply electrovalves, the liquid level within the tank.
  • an electric resistance is provided, which is arranged within the tank in the gap between the tank wall and the laundry basket.
  • the drying circuit of prior art washer-drier machines typically comprises a suction unit, a heat exchanger and a heating unit with electric resistances intercommunicating by means of a drying circuit.
  • the air flow generated by the suction unit is heated by the electric resistances and sent to the basket, where it flows through the wet laundry thereby causing the water contained in the fabric to evaporate.
  • the heat exchanger which is generally a container separate from the washing tank and provided with a spray nozzle, the wet air is cooled by a jet of cold water. Due to this cooling, the vapour condensates and is collected and discharged together with the cooling water. The de-humidified air is then sucked again by the suction unit and ricirculated.
  • the cooling water is usually supplied to the heat exchanger by means of a cooling duct with a dedicated electrovalve which controls the loading of the mains water in the heat exchanger (condenser).
  • the object of the present invention is thus to provide a washer-drier machine having such characteristics as to reduce the consumption of mains water during the drying step.
  • a further object of the present invention is to simplify the structure of the washer-drier machine and reduce the number of hydraulic components thereof.
  • the washer-drier machine comprises a laundry basket that is supported within a washing tank suitable to contain the washing liquid, in which the washing tank internally defines a condensation space suitable to contain a cooling water volume forming a free water surface spaced away from the basket such as to be capable of cooling the drying air flow downstream of the basket within the washing tank.
  • the whole supply circuit of the condenser can be eliminated, as the latter can be easily supplied with mains water loaded by the washing water loading circuit, since it consists of a free surface of a water volume within the washing tank.
  • the operation of the washer-drier machine is controlled by a program which carries out, during the drying step, the following actions:
  • FIG. 1 is a side sectional view of a washer-drier machine according to an embodiment of the invention
  • FIG. 2 is a front sectional view of the washer-drier machine in Fig. 1 ;
  • FIG. 3 is a partially sectional top view of the washer-drier machine in Fig. 1 ;
  • FIG. 4 is a side sectional view of a washer-drier machine according to a second embodiment of the invention.
  • FIG. 5 is a front sectional view of the washer-drier machine in Fig. 4 ;
  • FIG. 6 is a partially sectional top view of the washer-drier machine in Fig. 4 .
  • a washer-drier machine 1 comprises a support and housing structure 2, a washing tank 3 being housed therein, which is provided with a front opening that can be closed by means of a porthole door 4 being hinged in the front of the housing 2.
  • a basket 5 is pivotally housed about a horizontal or inclined axis, for the laundry to be accommodated therein to be washed and/or dried.
  • the basket 5 also defines a front opening that is located such as to match the opening of the washing tank 3, in order to load/unload the laundry.
  • the washing tank 3 is suitable to contain the washing liquid during the laundry washing steps, and to be a portion of the drying circuit during the laundry drying step.
  • a washing water delivery system is provided to be connected to the water system.
  • This washing water delivery system comprises a plurality of washing flow paths extending from, for example, two supply electrovalves 6, 7, through corresponding compartments 8, 9, 10 of a detergent tray 12, to the washing tank 3.
  • a drain duct 14 with a discharge pump 15 being associated thereto, which provides for the removal of the washing liquid from the tank 3 and controls, together with the supply electrovalves 6, 7 the level of liquid within the tank 3.
  • a coiled electric resistance 11 is provided, which is arranged within the tank 3, particularly on the bottom 13 of the latter, in the gap between the tank wall 3 and the laundry basket 5.
  • the washer-drier machine 1 further comprises a closed-loop drying circuit with a suction unit, for example an fan impeller 17 driven by an electric motor 18, a heat exchanger as well as a heating unit with electric resistance 21, which communicate with each other by means of a drying circuit 16.
  • a closed-loop drying circuit with a suction unit for example an fan impeller 17 driven by an electric motor 18, a heat exchanger as well as a heating unit with electric resistance 21, which communicate with each other by means of a drying circuit 16.
  • the air flow 22 generated by the suction unit 17, 18 is heated by the electric resistance 21 and sent to the basket 5, where it flows through the wet laundry thereby causing the water contained in the fabric to evaporate.
  • the heat exchanger is arranged downstream of the laundry basket 5 (with reference to the direction of the drying air flow 22) and cools the wet air flowing from the basket 5.
  • vapour condensates and is collected and discharged, for example together with a cooling water volume.
  • the de-humidified air is then sucked again by the suction unit 17, 18 and ricirculated.
  • the washing tank 3 defines therein a condensation space 19 suitable to contain a cooling water volume 20 that forms a free water surface spaced away from the basket 5 such as to be capable of cooling the drying air flow 22 downstream of the basket 5 within the washing tank 3.
  • this condensation space 19 is formed at the tank bottom 13, approximatively below the basket 5.
  • the whole supply circuit of the condenser can be eliminated, as the latter can be easily supplied with mains water loaded by the washing water loading circuit, since it consists of a free surface of a water volume 20 (condensation surface) within the washing tank 3.
  • the washer-drier machine 1 comprises a control unit (not shown in the drawings) which allows setting a drying program that carries out the following steps:
  • the step of controlling the level of cooling water 20 comprises the step of detecting a value indicative of the level of cooling water 20 and at least partially draining the cooling water 20 through the drain duct 14, when the level of cooling water 20 exceeds said upper level.
  • the operation of detecting a value indicative of the level of cooling water 20 is carried out by means of a pressure sensor 24 that is arranged at the tank bottom 13.
  • This pressure sensor 24 (e.g., a so-called pressure switch) generates a pressure signal and sends it to the control unit that, in turn, controls the discharge pump 15 and causes the latter to at least partially drain the cooling water 20 and condensate from the washing tank 3.
  • the pressure sensor 24 directly interacts with the power supply of the discharge pump 15 and causes the partial or total drainage of the tank 3 in response to the attainment of a determined water level, for example the above-cited upper level.
  • control of the cooling water level 20 can be carried out with one or more level sensors (such as a sensor using the electrical conductivity of the cooling water 20) that are connected to the control unit and/or directly to the discharge pump 15.
  • level sensors such as a sensor using the electrical conductivity of the cooling water 20
  • the washer-drier machine and the washing and drying programs thereof are configured such that the control of the level of cooling water 20 during the drying step and the control of the washing liquid level during the washing and rinse step are carried out by means of a same pressure sensor 24 or group of level sensors.
  • control of the level of cooling water 20 can be carried out by at least partially draining this water, at preset time intervals, wherein the duration of these intervals is determined, for example, on the basis of a series of tests or numerical simulations and takes into account the condensate accumulation on the tank bottom.
  • the process step of controlling the temperature of cooling water 20 comprises the step of detecting the temperature or a magnitude indicative of the temperature of the cooling water 20 and at least partially discharging the cooling water 20 through the drain duct 14 and feeding a corresponding amount of fresh mains water in the washing tank 3, when the temperature detected exceeds said upper value.
  • the operation of detecting the temperature of the cooling water 20 is carried out by means of a temperature sensor 25 arranged in the vicinity of the tank bottom 13.
  • This temperature sensor 25 generates a temperature signal and sends it to the control unit, which, in turn controls the drain pump 15 and the supply electrovalves 6, 7.
  • the control unit When the upper temperature is reached or exceeded, the control unit causes the drain pump 15 to at least partially remove the cooling water 20 and condensate from the washing tank 3 and, subsequently, it opens the supply electrovalve 6 and/or 7 to feed a corresponding amount of cold mains water, preferably through the same water supply duct used during the washing step.
  • the temperature sensor 25 directly interacts with the power supply of the discharge pump 15 and supply electrovalves 6, 7 and causes the partial or total replacement of the cooling water 3 in response to the fact that the upper temperature has been attained or exceeded.
  • the washer-drier machine and the washing and drying programs are configured such that the control of the temperature of the cooling water 20 during the drying step and the control of the temperature of the washing liquid during the washing and rinse steps are carried out by means of a same temperature sensor 25 or groups of temperature sensors.
  • control of the temperature of the cooling water 20 can be carried out by at least partially draining this water, at preset time intervals, wherein the duration of these intervals is determined, for example, on the basis of a series of tests or numerical simulations and takes into account the temperature increase in the mixture of cooling water and condensate on the tank bottom 13.
  • control unit is configured such as to allow selecting a drying program in which during the last drying step, also known as the cool-down step, the condensation space 19 results to be completely without cooling water 20, which has been previously drained and not replaced with fresh mains water.
  • the last drying step also known as the cool-down step
  • the residual humidity can be extracted from the laundry without an active cooling by the drying air flow 22.
  • control unit is configured such as to allow selecting a drying program in which only or also during the early drying step, the condensation space 19 results to be completely without cooling water 20, which will be loaded only about 20 min - 40 min, preferably 30 min after the beginning of the drying step.
  • experimental tests have proved that a part of the humidity can be also extracted from the laundry during the early drying step without an active cooling by the cooling air flow 22.
  • the washing tank 3 which is preferably moulded from plastics, defines therein a suction portion 26 of the drying duct 16, i.e. the duct portion arranged downstream of the heat exchanger (consisting of the free surface 23 of the cooling water 20 on the tank bottom 13) and upstream of the suction unit 17, 18.
  • this suction duct 26 extends within the washing tank 3 from a lower area thereof to an opening 27 in the upper area thereof and is defined by a portion of the inner surface of the tank 3 and by a lid 28 that is separately manufactured and subsequently connected to the inner surface of the washing tank 3.
  • washing tank 3 can be advantageously used both with washing machines without drying function (without the inner lid 28), and with drier-washer machines (with the inner lid 28).
  • the washer-drier machine 1 comprises in addition to the heat exchanger consisting of the cooling water volume 20 on the tank bottom 13, a further heat exchanger 29, which is preferably arranged downstream of the first heat exchanger 19, 20 (with reference to the direction of the drying air flow 22)
  • the additional heat exchanger 29 comprises a cooling coil 30 that can be supplied with mains water and is arranged in the supply path of the washing water, preferably between the supply electrovalve 6, 7 and the detergent tray 12.
  • the additional heat exchanger 29 is also supplied by means of the same washing water supply circuit.
  • the cooling coil 30 of the additional heat exchanger 29 is formed, for example by means of blow moulding, at or in the lid 28 of the suction portion 26 of the drying duct 16.
  • the cooling coil 30 cannot be emptied. By opening the supply valve 6, 7, the water contained within the cooling coil 30 can be only replaced with fresh mains water.
  • control unit in addition to the first heat exchanger consisting of the cooling water volume 20 on the bottom of the washing tank 3, the control unit is preferably configured such as to allow selecting a drying program, in which, during an early drying step, only the additional heat exchanger will be operated, whereas the condensation space 19 on the tank bottom 13 is not provided with cooling water 20.
  • the washer-drier machine according to the invention has a number of advantages.
  • the washer-drier machine according to the invention is a considerable simplification and unification, both in terms of structure and washing and drying programs.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
EP07425471.5A 2007-07-26 2007-07-26 Wasch- und Trocknungsmaschine Active EP2019162B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07425471.5A EP2019162B1 (de) 2007-07-26 2007-07-26 Wasch- und Trocknungsmaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07425471.5A EP2019162B1 (de) 2007-07-26 2007-07-26 Wasch- und Trocknungsmaschine

Publications (2)

Publication Number Publication Date
EP2019162A1 true EP2019162A1 (de) 2009-01-28
EP2019162B1 EP2019162B1 (de) 2016-10-19

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Application Number Title Priority Date Filing Date
EP07425471.5A Active EP2019162B1 (de) 2007-07-26 2007-07-26 Wasch- und Trocknungsmaschine

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013165109A1 (en) 2012-05-03 2013-11-07 Lg Electronics Inc. Laundry treating machine and control method thereof
WO2014129770A1 (en) * 2013-02-20 2014-08-28 Samsung Electronics Co., Ltd. Drum washing machine
CN111871035A (zh) * 2020-07-23 2020-11-03 江苏甬磁磁性材料研究院有限公司 一种磁钢生产成型冷却装置及其冷却方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2459319A1 (de) * 1974-12-14 1976-06-16 Hugo Werner Geschka Waeschetrockner
FR2372923A1 (fr) * 1976-12-03 1978-06-30 Bosch Siemens Hausgeraete Machine de traitement du linge equipee pour le sechage
DE3315754A1 (de) * 1983-04-30 1984-10-31 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Haushalts-waeschetrockner
EP1657341A2 (de) * 2004-11-12 2006-05-17 LG Electronics Inc. Verfahren und Vorrichtung zur Kontrolle der Trocknung in einer maschine zum Waschen und Trocknen
EP1688524A1 (de) * 2005-02-03 2006-08-09 Lg Electronics Inc. Waschmaschine und/oder Trockner mit einer Kondensationseinrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2459319A1 (de) * 1974-12-14 1976-06-16 Hugo Werner Geschka Waeschetrockner
FR2372923A1 (fr) * 1976-12-03 1978-06-30 Bosch Siemens Hausgeraete Machine de traitement du linge equipee pour le sechage
DE3315754A1 (de) * 1983-04-30 1984-10-31 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Haushalts-waeschetrockner
EP1657341A2 (de) * 2004-11-12 2006-05-17 LG Electronics Inc. Verfahren und Vorrichtung zur Kontrolle der Trocknung in einer maschine zum Waschen und Trocknen
EP1688524A1 (de) * 2005-02-03 2006-08-09 Lg Electronics Inc. Waschmaschine und/oder Trockner mit einer Kondensationseinrichtung

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013165109A1 (en) 2012-05-03 2013-11-07 Lg Electronics Inc. Laundry treating machine and control method thereof
CN104334789A (zh) * 2012-05-03 2015-02-04 Lg电子株式会社 衣物处理机及其控制方法
EP2844794A4 (de) * 2012-05-03 2015-10-28 Lg Electronics Inc Wäschebehandlungsmaschine und steuerungsverfahren dafür
WO2014129770A1 (en) * 2013-02-20 2014-08-28 Samsung Electronics Co., Ltd. Drum washing machine
AU2014219634B2 (en) * 2013-02-20 2016-04-28 Samsung Electronics Co., Ltd. Drum washing machine
US9746238B2 (en) 2013-02-20 2017-08-29 Samsung Electronics Co., Ltd. Drum washing machine
CN111871035A (zh) * 2020-07-23 2020-11-03 江苏甬磁磁性材料研究院有限公司 一种磁钢生产成型冷却装置及其冷却方法
CN111871035B (zh) * 2020-07-23 2022-01-04 江苏甬磁磁性材料研究院有限公司 一种磁钢生产成型冷却装置及其冷却方法

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Publication number Publication date
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