EP2994564B1 - A washing machine comprising a filtration unit - Google Patents

A washing machine comprising a filtration unit Download PDF

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Publication number
EP2994564B1
EP2994564B1 EP14719776.8A EP14719776A EP2994564B1 EP 2994564 B1 EP2994564 B1 EP 2994564B1 EP 14719776 A EP14719776 A EP 14719776A EP 2994564 B1 EP2994564 B1 EP 2994564B1
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EP
European Patent Office
Prior art keywords
water
filtration unit
unit
washing machine
sterilization
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
EP14719776.8A
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German (de)
French (fr)
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EP2994564A1 (en
Inventor
Fatih KASAP
Betul BULUT
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.)
Arcelik AS
Original Assignee
Arcelik AS
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Publication date
Application filed by Arcelik AS filed Critical Arcelik AS
Priority to TR2017/19563T priority Critical patent/TR201719563T4/en
Publication of EP2994564A1 publication Critical patent/EP2994564A1/en
Application granted granted Critical
Publication of EP2994564B1 publication Critical patent/EP2994564B1/en
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    • 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/083—Liquid discharge or recirculation 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
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/10—Filtering arrangements

Definitions

  • the present invention relates to a washing machine that comprises a sterilization unit.
  • Ca ++ and Mg ++ ions that increase the hardness of water are present in the water received from the water mains and used in the washing process.
  • the ions that increase water hardness join with the surfactants present in the detergent and decrease the cleaning properties of these agents thus the laundry cannot be cleaned in a desired manner.
  • the ions that increase water hardness furthermore cause lime accumulation on components like the heater by generating deposits in hot water.
  • utilization of cross-flow filtration systems is known for decreasing the hardness of water.
  • cross-flow filtration water is passed tangentially over a membrane and water is separated into two as soft and hard water.
  • German Patent DE 199 64 292 B4 describes a washing machine in which wash water is circulated via a filtering device in order to remove dirt by centrifugal forces.
  • An ultraviolet lamp is arranged at the outlet of the filter for sterilization of the circulated wash water.
  • the aim of the present invention is the realization of a washing machine wherein the laundry is washed in a hygienic manner.
  • the washing machine realized in order to attain the aim of the present invention comprises a tub wherein the washing process is realized, a water inlet valve that supplies water from the water mains to the tub to be used in the washing program, a reservoir connected to the water inlet valve, a supply line that provides the circulation of the water between the reservoir and the filtration unit and that delivers the water from the reservoir to the filtration unit, a soft water line that enables the water removed of hardness by being filtered in the filtration unit to be delivered to the tub, and a return line that enables the hard water running down from the filter by flowing together with the substances trapped on the surface of the filter in the filtration unit to be transferred to the reservoir.
  • the return line the hard water is collected in the reservoir to be used in the rinsing steps, thus providing water savings.
  • the washing machine of the present invention comprises a sterilization unit wherein the sterilization unit is situated on the supply line and is situated on the inlet of the filtration unit and/or wherein the sterilization unit is situated on the soft water line and is situated on the outlet of the filtration unit.
  • the sterilization unit enables the water kept in the filtration unit to be sterilized.
  • the membrane surface In order to prevent the membrane-shaped filtration unit from being damaged, the membrane surface must be kept in a humid state.
  • the accumulation of the water inside the filtration unit causes microorganism growth.
  • the sterilization unit situated on the soft water line the water, of which the microbiological load increases as it is kept in the filtration unit, is sterilized. Thus, the water is cleansed of the microorganisms before being taken into the tub.
  • the washing machine comprises a control unit that activates the sterilization unit for a predetermined sterilization time if the time the water is kept inside the filtration unit is longer than a predetermined water waiting time. If the water is kept inside the filtration unit for a time longer than the water waiting time predetermined by the producer or the user, the control unit activates the sterilization unit.
  • the sterilization unit is operated in a controlled manner, providing energy savings.
  • the sterilization unit is an ultraviolet lamp.
  • the ultraviolet lamp emits ultraviolet rays with wavelengths between 240 nm and 280 nm. Since the wavelength range between 240 nm and 280 nm is the ray range with the highest effect on microorganisms, the microbiological load of the water is effectively reduced before being sent to the tub.
  • the sterilization unit is an ultrasonic transducer.
  • the washing machine comprises a circulation pump that is situated on the supply line and that enables the water to be circulated between the reservoir and the filtration unit.
  • the sterilization unit is disposed between the circulation pump and the filtration unit.
  • the washing machine comprises a rinsing water line that transfers hard water from the reservoir to the tub.
  • a rinsing water line that transfers hard water from the reservoir to the tub.
  • microorganisms grow in the water that is accumulated and kept inside the filtration unit and the reservoir.
  • the sterilization unit microorganisms in the water leaving the filtration unit and the reservoir are killed and the washing process is realized in a hygienic manner.
  • Figure 1 - is the schematic view of a washing machine.
  • the washing machine (1) comprises a tub (2) wherein the washing process is performed, at least one water inlet valve (3) that enables water intake into the tub (2) from the water mains (S) to be used in the washing program, a cross-flow type filtration unit (4), functioning as "water softening device", that separates ions like Ca ++ , Mg ++ by passing water through a filter (F) thus providing the removal of the hardness of water, a soft water line (5) that provides delivering of the water removed of hardness by being filtered in the filtration unit (4) to the tub (2), a reservoir (6) that is connected to the water inlet valve (3), a supply line (7) that enables the water to be circulated between the reservoir (6) and the filtration unit (4) and that delivers water from the reservoir (6) to the filtration unit (4), and a return line (8) that enables the hard water running down from the filter (F) by flowing together with the substances trapped on the surface of the filter (F) in the filtration unit (4) to be transferred to the reservoir (6).
  • the washing machine (1) of the present invention comprises a sterilization unit (9) that is situated on the supply line (7) and/or on the soft water line (5) and that enables the water kept in the filtration unit (4) to be sterilized.
  • the membrane surface In order to prevent the membrane-shaped filtration unit (4) from being damaged, the membrane surface must be kept in a humid state.
  • the sterilization unit (9) situated on the soft water line (5) the water, wherein bacteria growth is observed as it is kept in the filtration unit (4), is sterilized.
  • the water is cleansed of the microorganisms before being taken into the tub (2).
  • the sterilization unit (9) situated on the supply line (7) and/or the soft water line (5) the microorganisms growing in the water kept in the filtration unit (4) are killed.
  • the sterilization unit (9) is situated at the outlet of the filtration unit (4).
  • the sterilization process is realized when the water is transferred from the filtration unit (4) to the tub (2).
  • the sterilization unit (9) is situated at the inlet of the filtration unit (4).
  • the washing machine (1) comprises a control unit (10) that activates the sterilization unit (9) for a predetermined sterilization time (t s ) if the time the water is kept inside the filtration unit (4) (t b ) is longer than a predetermined water waiting time (t bset ). If the water is kept inside the filtration unit (4) for a time longer than the water waiting time (t bset ) predetermined by the producer or the user, the control unit (10) activates the sterilization unit (9).
  • the sterilization unit (9) is operated in a controlled manner, providing energy savings.
  • the sterilization unit (9) is an ultraviolet lamp.
  • the ultraviolet lamp emits ultraviolet rays with wavelengths between 240 nm and 280 nm. Since the wavelength range between 240 nm and 280 nm is the ray range with the highest effect on microorganisms, the microbiological load of the water is effectively reduced before being sent to the tub (2).
  • the sterilization unit (9) is an ultrasonic transducer.
  • the washing machine (1) comprises a circulation pump (11) that is situated on the supply line (7) and that enables the water to be circulated between the reservoir (6) and the filtration unit (4), and the sterilization unit (9) is disposed between the circulation pump (11) and the filtration unit (4).
  • the washing machine (1) comprises a rinsing water line (12) that transfers hard water from the reservoir (6) to the tub (2).
  • a rinsing water line (12) that transfers hard water from the reservoir (6) to the tub (2).
  • water must be kept inside the filtration unit (4) in order to prevent the occurrence of capillary cracks on the surface of the membrane-shaped filtration unit (4) due to humidity deficiency. Moreover, water may stay inside the filtration unit (4) during a power shortage or washing steps.
  • the sterilization unit (9) the water kept inside the filtration unit (4) is sterilized before being taken into the tub (2), the laundry is enabled to be efficiently cleaned and generation of microorganism-based bad odor is prevented.

Description

  • The present invention relates to a washing machine that comprises a sterilization unit.
    In washing machines, Ca++ and Mg++ ions that increase the hardness of water are present in the water received from the water mains and used in the washing process. The ions that increase water hardness join with the surfactants present in the detergent and decrease the cleaning properties of these agents thus the laundry cannot be cleaned in a desired manner. The ions that increase water hardness furthermore cause lime accumulation on components like the heater by generating deposits in hot water. In the state of the art, utilization of cross-flow filtration systems is known for decreasing the hardness of water. In the embodiment of cross-flow filtration, water is passed tangentially over a membrane and water is separated into two as soft and hard water. In order to prevent the membrane used in this type of filtration units from drying and cracking, sufficient amount of water must be present in the filtration unit to keep the membrane in a humid state. However, keeping the water inside the filtration unit creates an environment suitable for microorganism growth.
    In the European Patent Application No. EP2012062156 , a washing machine is described, wherein the hard water separated from the filtration unit in the water softening process is not discharged outside but used in the laundry rinsing processes thus providing water savings.
  • German Patent DE 199 64 292 B4 describes a washing machine in which wash water is circulated via a filtering device in order to remove dirt by centrifugal forces. An ultraviolet lamp is arranged at the outlet of the filter for sterilization of the circulated wash water.
  • International Patent Application WO 2013/000839 A1 discloses a washing machine comprising a cross-flow type filtration unit that provides the removal of the hardness of water by passing the mains water through a filter.
  • The aim of the present invention is the realization of a washing machine wherein the laundry is washed in a hygienic manner.
    The washing machine realized in order to attain the aim of the present invention, explicated in the first claim and the respective claims thereof, comprises a tub wherein the washing process is realized, a water inlet valve that supplies water from the water mains to the tub to be used in the washing program, a reservoir connected to the water inlet valve, a supply line that provides the circulation of the water between the reservoir and the filtration unit and that delivers the water from the reservoir to the filtration unit, a soft water line that enables the water removed of hardness by being filtered in the filtration unit to be delivered to the tub, and a return line that enables the hard water running down from the filter by flowing together with the substances trapped on the surface of the filter in the filtration unit to be transferred to the reservoir. By means of the return line, the hard water is collected in the reservoir to be used in the rinsing steps, thus providing water savings.
  • The washing machine of the present invention comprises a sterilization unit wherein the sterilization unit is situated on the supply line and is situated on the inlet of the filtration unit and/or wherein the sterilization unit is situated on the soft water line and is situated on the outlet of the filtration unit. The sterilization unit enables the water kept in the filtration unit to be sterilized. In order to prevent the membrane-shaped filtration unit from being damaged, the membrane surface must be kept in a humid state. The accumulation of the water inside the filtration unit causes microorganism growth. By means of the sterilization unit situated on the soft water line, the water, of which the microbiological load increases as it is kept in the filtration unit, is sterilized. Thus, the water is cleansed of the microorganisms before being taken into the tub.
  • In case the sterilization unit is situated on the soft water line, the washing machine comprises a control unit that activates the sterilization unit for a predetermined sterilization time if the time the water is kept inside the filtration unit is longer than a predetermined water waiting time. If the water is kept inside the filtration unit for a time longer than the water waiting time predetermined by the producer or the user, the control unit activates the sterilization unit. Thus, the sterilization unit is operated in a controlled manner, providing energy savings.
  • In an embodiment of the present invention, the sterilization unit is an ultraviolet lamp. The ultraviolet lamp emits ultraviolet rays with wavelengths between 240 nm and 280 nm. Since the wavelength range between 240 nm and 280 nm is the ray range with the highest effect on microorganisms, the microbiological load of the water is effectively reduced before being sent to the tub. In an embodiment of the present invention, the sterilization unit is an ultrasonic transducer.
  • In an embodiment of the present invention, the washing machine comprises a circulation pump that is situated on the supply line and that enables the water to be circulated between the reservoir and the filtration unit. The sterilization unit is disposed between the circulation pump and the filtration unit.
  • In an embodiment of the present invention, the washing machine comprises a rinsing water line that transfers hard water from the reservoir to the tub. Thus, receiving additional water from the water mains is not necessary for the laundry rinsing process and water saving is provided.
  • In the washing machine of the present invention, microorganisms grow in the water that is accumulated and kept inside the filtration unit and the reservoir. By means of the sterilization unit, microorganisms in the water leaving the filtration unit and the reservoir are killed and the washing process is realized in a hygienic manner.
  • The washing machine realized in order to attain the aim of the present invention is illustrated in the attached figures, where:
    Figure 1 - is the schematic view of a washing machine.
  • The elements illustrated in the figures are numbered as follows:
    1. 1. Washing machine
    2. 2. Tub
    3. 3. Water inlet valve
    4. 4. Filtration unit
    5. 5. Soft water line
    6. 6. Reservoir
    7. 7. Supply line
    8. 8. Return line
    9. 9. Sterilization unit
    10. 10. Control unit
    11. 11. Circulation pump
    12. 12. Rinsing water line
  • The following symbols are used for explicating the washing machine (1) of the present invention:
    • tbset : a predetermined water waiting time
    • tb : the time the water is kept inside the filtration unit (4)
    • ts : a predetermined sterilization time
    • F : Filter
    • S : Water mains
  • The washing machine (1) comprises a tub (2) wherein the washing process is performed, at least one water inlet valve (3) that enables water intake into the tub (2) from the water mains (S) to be used in the washing program, a cross-flow type filtration unit (4), functioning as "water softening device", that separates ions like Ca++, Mg++ by passing water through a filter (F) thus providing the removal of the hardness of water, a soft water line (5) that provides delivering of the water removed of hardness by being filtered in the filtration unit (4) to the tub (2), a reservoir (6) that is connected to the water inlet valve (3), a supply line (7) that enables the water to be circulated between the reservoir (6) and the filtration unit (4) and that delivers water from the reservoir (6) to the filtration unit (4), and a return line (8) that enables the hard water running down from the filter (F) by flowing together with the substances trapped on the surface of the filter (F) in the filtration unit (4) to be transferred to the reservoir (6). The hard water collected in the reservoir (6) is not discharged outside, but delivered to the tub (2) in the rinsing steps and used for rinsing the laundry. The washing machine (1) of the present invention comprises a sterilization unit (9) that is situated on the supply line (7) and/or on the soft water line (5) and that enables the water kept in the filtration unit (4) to be sterilized. In order to prevent the membrane-shaped filtration unit (4) from being damaged, the membrane surface must be kept in a humid state. By means of the sterilization unit (9) situated on the soft water line (5), the water, wherein bacteria growth is observed as it is kept in the filtration unit (4), is sterilized. Thus, the water is cleansed of the microorganisms before being taken into the tub (2). By means of the sterilization unit (9) situated on the supply line (7) and/or the soft water line (5), the microorganisms growing in the water kept in the filtration unit (4) are killed.
  • In an embodiment of the present invention, the sterilization unit (9) is situated at the outlet of the filtration unit (4). Thus, the sterilization process is realized when the water is transferred from the filtration unit (4) to the tub (2).
  • In an embodiment of the present invention, the sterilization unit (9) is situated at the inlet of the filtration unit (4).
  • In an embodiment of the present invention, the washing machine (1) comprises a control unit (10) that activates the sterilization unit (9) for a predetermined sterilization time (ts) if the time the water is kept inside the filtration unit (4) (tb) is longer than a predetermined water waiting time (t bset). If the water is kept inside the filtration unit (4) for a time longer than the water waiting time (tbset) predetermined by the producer or the user, the control unit (10) activates the sterilization unit (9). Thus, the sterilization unit (9) is operated in a controlled manner, providing energy savings.
  • In an embodiment of the present invention, the sterilization unit (9) is an ultraviolet lamp. The ultraviolet lamp emits ultraviolet rays with wavelengths between 240 nm and 280 nm. Since the wavelength range between 240 nm and 280 nm is the ray range with the highest effect on microorganisms, the microbiological load of the water is effectively reduced before being sent to the tub (2).
  • In an embodiment of the present invention, the sterilization unit (9) is an ultrasonic transducer.
  • In an embodiment of the present invention, the washing machine (1) comprises a circulation pump (11) that is situated on the supply line (7) and that enables the water to be circulated between the reservoir (6) and the filtration unit (4), and the sterilization unit (9) is disposed between the circulation pump (11) and the filtration unit (4).
  • In an embodiment of the present invention, the washing machine (1) comprises a rinsing water line (12) that transfers hard water from the reservoir (6) to the tub (2). Thus, receiving additional water from the water mains is not necessary for the laundry rinsing process and water saving is provided.
  • In the washing machine (1) of the present invention, water must be kept inside the filtration unit (4) in order to prevent the occurrence of capillary cracks on the surface of the membrane-shaped filtration unit (4) due to humidity deficiency. Moreover, water may stay inside the filtration unit (4) during a power shortage or washing steps. By means of the sterilization unit (9), the water kept inside the filtration unit (4) is sterilized before being taken into the tub (2), the laundry is enabled to be efficiently cleaned and generation of microorganism-based bad odor is prevented.

Claims (5)

  1. A washing machine (1) comprising a tub (2), at least one water inlet valve (3) that enables water intake into the tub (2) from the water mains (S), a cross-flow type filtration unit (4) that provides the removal of the hardness of water by passing the mains water through a filter (F), a soft water line (5) that provides delivering of the water removed of hardness in the filtration unit (4) to the tub (2), a reservoir (6) that is connected to the water inlet valve (3), a supply line (7) that enables the water to be circulated between the reservoir (6) and the filtration unit (4) and that delivers water from the reservoir (6) to the filtration unit (4), and a return line (8) that enables the hard water running down from the filter (F) by flowing together with the substances trapped on the surface of the filter (F) in the filtration unit (4) to be transferred to the reservoir (6),
    characterized by at least one sterilization unit (9) that enables the water kept in the filtration unit (4) to be sterilized and
    wherein the sterilization unit (9) is situated on the supply line (7) and is disposed at the inlet of the filtration unit (4) and/or
    wherein the sterilization unit (9) is situated on the soft water line (5) and is disposed at the outlet of the filtration unit (4),
    and in case that the sterilization unit (9) is situated on the soft water line (5), the washing machine (1) is further characterized by a control unit (10) that activates the sterilization unit (9) for a predetermined sterilization time (ts) if the time the water is kept inside the filtration unit (4) (tb) is longer than a predetermined water waiting time (tbset).
  2. A washing machine (1) as in any one of the above claims, characterized by the sterilization unit (9) which is an ultraviolet lamp.
  3. A washing machine (1) as in any one of the above claims, characterized by the sterilization unit (9) which is an ultrasonic transducer.
  4. A washing machine (1) as in any one of the above claims, characterized by a circulation pump (11) that is situated on the supply line (7) and that enables the water to be circulated between the reservoir (6) and the filtration unit (4), and the sterilization unit (9) that is disposed between the circulation pump (11) and the filtration unit (4).
  5. A washing machine (1) as in any one of the above claims, characterized by a rinsing water line (12) that transfers hard water from the reservoir (6) to the tub (2).
EP14719776.8A 2013-05-08 2014-04-28 A washing machine comprising a filtration unit Active EP2994564B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
TR2017/19563T TR201719563T4 (en) 2013-05-08 2014-04-28 A washing machine with a filtering unit.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR201305503 2013-05-08
PCT/EP2014/058571 WO2014180691A1 (en) 2013-05-08 2014-04-28 A washing machine comprising a filtration unit

Publications (2)

Publication Number Publication Date
EP2994564A1 EP2994564A1 (en) 2016-03-16
EP2994564B1 true EP2994564B1 (en) 2018-08-08

Family

ID=50588710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14719776.8A Active EP2994564B1 (en) 2013-05-08 2014-04-28 A washing machine comprising a filtration unit

Country Status (3)

Country Link
EP (1) EP2994564B1 (en)
TR (1) TR201719563T4 (en)
WO (1) WO2014180691A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113774613B (en) * 2021-10-08 2022-05-10 珠海格力电器股份有限公司 Washing machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19964292B4 (en) * 1998-03-05 2004-03-18 Samsung Electronics Co., Ltd., Suwon A washer has a centrifugal water filter through which the wash liquor continuously cycles
US7823237B2 (en) * 2004-05-17 2010-11-02 The Procter & Gamble Company Methods for cleaning laundry with reduced sorting
EP1598470A1 (en) * 2004-05-17 2005-11-23 The Procter & Gamble Company Method and system for washing
EP1995367B1 (en) * 2007-05-16 2012-03-14 Samsung Electronics Co., Ltd. Washing machine having water softening device
TR201106342A1 (en) * 2011-06-27 2013-01-21 Arçeli̇k Anoni̇m Şi̇rketi̇ A washing machine with a filtering unit.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
TR201719563T4 (en) 2018-01-22
EP2994564A1 (en) 2016-03-16
WO2014180691A1 (en) 2014-11-13

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