US20140310885A1 - Method for washing laundry in a spray washing machine - Google Patents

Method for washing laundry in a spray washing machine Download PDF

Info

Publication number
US20140310885A1
US20140310885A1 US14/250,746 US201414250746A US2014310885A1 US 20140310885 A1 US20140310885 A1 US 20140310885A1 US 201414250746 A US201414250746 A US 201414250746A US 2014310885 A1 US2014310885 A1 US 2014310885A1
Authority
US
United States
Prior art keywords
tub
drum
laundry
heating device
washing machine
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.)
Abandoned
Application number
US14/250,746
Other languages
English (en)
Inventor
Claudio Civanelli
Sylvia Guzman
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.)
Whirlpool Corp
Original Assignee
Whirlpool Corp
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=48145490&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20140310885(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Whirlpool Corp filed Critical Whirlpool Corp
Assigned to WHIRLPOOL CORPORATION reassignment WHIRLPOOL CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Guzman, Sylvia, CIVANELLI, CLAUDIO
Publication of US20140310885A1 publication Critical patent/US20140310885A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/006—Methods for washing, rinsing or spin-drying for washing or rinsing only
    • 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 
    • D06F39/04—Heating arrangements

Definitions

  • the present invention relates to a method for washing laundry in a horizontal axis washing machine comprising a drum rotatably mounted in a tub, a recirculation pump for recirculating a washing liquid on the laundry and a heating device placed in the tub for heating washing liquid.
  • So called “jet” or “spray” washing machines are well known in which the washing liquor is sprayed onto the laundry while the drum is rotated at a predetermined tumbling speed or spinning speed.
  • the main advantage of such known washing method is an increase of washing efficiency due to the high detergent concentration and the overall reduction of water amount.
  • an increase of water level up to 20 mm is obtained in the tub so that heater can be safely switched on.
  • One of the main feature of the invention is the application of a low speed spinning sufficiently high to generate a centrifugal force which forms and maintains at least partially an annular layer of clothes against the drum wall to free water from laundry and to increase water level in the wash tub.
  • a low speed spinning phase which can be defined also as a high speed tumbling phase
  • water recirculation is interrupted.
  • water heating in the tub is carried out preferably with a slow motion movement (tumbling).
  • Such water heating is preferably carried out for a predetermined period of time (and not on the basis of a temperature feedback). This predetermined time is set on the basis of the total energy which has to be transferred to the laundry (as it will be clear in the following detailed description).
  • Temperature in the sump of the tub is therefore not monitored (a part from its sensing for safety reasons).
  • the drum is rotated again at a low spinning speed during which water already warmed is recirculated directly to the laundry.
  • FIG. 1 is a schematic view of a spray washing machine
  • FIG. 2 is a diagram showing changes of water level in the tub vs. time in a washing method according to the invention
  • FIG. 3 shows the on/off cycle of the recirculation pump associated to the level diagram of FIG. 2 ;
  • FIG. 4 is a diagram showing the speed of the drum vs. time, particularly in association with the washing method referred to in FIG. 2 ;
  • FIG. 5 is a diagram showing water temperature vs., time in a conventional spray washer (dotted line) and in a spray washing machine according to the invention (solid line);
  • FIG. 6 is a diagram showing how in the same washing machines referred to in FIG. 5 the temperature of the laundry changes with time;
  • FIG. 7 is a diagram showing energy consumption vs. time of the same washing machines referred to in FIGS. 5 and 6 ;
  • FIGS. 8-9 are diagrams similar to FIGS. 5 and 7 in a different working condition.
  • a spray washing machine having a tub 12 , a rotating drum 14 inside the tub 12 and driven by a motor 16 , an electric heater 18 in the lower portion of the tub 12 , a recirculation conduit 20 provided with a circulation pump 22 and a spray nozzle 24 for spraying washing liquid onto the laundry L.
  • washing liquid we mean either water or a mixture of water plus detergents or the like.
  • the washing machine has other components, as the drain pump, possible water storage tank, detergent distributors, water level sensors etc. but these will not be described in the following since they are not specifically related to the invention.
  • the heater 18 , the motor 16 and the pump 22 are electrically connected to a control unit 26 which drives all such components according to a predetermined sequence.
  • a general advantage of using a recirculation system as shown in FIG. 1 is an improvement of the cleaning performances, for instance when such performances are tested according to the “red wine stain” standard procedure. Such advantage in cleaning performances is mainly due to a higher concentration of detergent.
  • such addition of water is avoided or at least reduced by stopping recirculation pump 22 , increasing the speed of the drum in order to extract water from the laundry L by centrifugal force and switching on the heater for water heating.
  • Such behavior is shown in FIGS. 2-4 where with S is indicated the above spinning phase.
  • water level W in the tub 12 is preferably measured and in case such level is lower than a predetermined threshold (indicated with T in FIG. 2 ), a partial refill is carried out.
  • a gentle tumbling of laundry L is carried out either for avoiding noise in the measurement of water level W or for obtaining a faster warm up of the free water near the heater 18 .
  • the heater 18 is switched off and recirculation pump 22 is switched on in order to spray heated water on laundry L by means of the spray nozzle 24 .
  • the slow spin phase S at a speed preferably comprised between 80 and 120 rpm, and more preferably around 100 rpm, is carried out after detergent is added in the tub 12 .
  • the method according to the invention can be carried out by adding detergent at the end of the heating phase, or at any time during the heating phase.
  • the overall duration of the spinning phase S is preferably comprised between 10 and 50 s, more preferably between 20 and 40 s.
  • control unit 26 of the washing machine 10 is running an algorithm for assessing the heating time after the slow spin phase S.
  • the first step of such algorithm is the measure of ambient temperature T1 by means of a NTC temperature sensor 15 placed in the tub. Such measure is carried out before feeding any water in the tub. This temperature is also assumed to be the temperature of the laundry dry load L. If a washing cycle has been recently terminated , the control unit 26 will assume as ambient temperature the T1 of the previous washing cycle.
  • Tt is the target temperature and T1 is ambient temperature.
  • Next step is to calculate the energy El which is needed for heating up the load L by multiplying the mass of load M1 by ⁇ T1 and by thermal capacity Cl of the load L:
  • Next step is calculation of water mass Mw by multiplying load mass Ml by specific absorption A of the load, by also adding a predetermined amount of free water Mwl:
  • Energy needed for heating water is calculated in a way similar to the calculation of energy for the load:
  • a certain energy loss towards environment is estimated by multiplying ⁇ T (Ttarget ⁇ T1) by a coefficient k which depends on the washing machine, to be experimentally assessed for each type of washing machine:
  • Total energy to be used in the heating process is then calculated:
  • R is resistance of the heater 18 .
  • FIGS. 5-7 show a comparison of the traditional spray washing cycle (dotted lines) and a washing cycle according to the invention (solid lines), and in which the same target temperature of laundry is used.
  • the applicant has discovered that in above condition, i.e. if it is desired to reach the same temperature of the laundry at the end of the heating phase, a lower energy is needed in the method according to the invention.
  • the applicant has measured an energy saving of at least 0.06 kWh for each washing cycle (this is shown in FIG. 7 ).
  • the method according to the invention is preferably used for horizontal axis washing machines, the same method can be used for vertical axis washing machines as well.
  • a horizontal axis washing machine is loaded with a cotton load Ml (thermal capacity 1.26 kJ/kg° C., specific absorption 2 l/kg).

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
US14/250,746 2013-04-18 2014-04-11 Method for washing laundry in a spray washing machine Abandoned US20140310885A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP13164308.2 2013-04-18
EP13164308.2A EP2792779B1 (fr) 2013-04-18 2013-04-18 Procédé pour laver du linge dans une machine de lavage par pulvérisation

Publications (1)

Publication Number Publication Date
US20140310885A1 true US20140310885A1 (en) 2014-10-23

Family

ID=48145490

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/250,746 Abandoned US20140310885A1 (en) 2013-04-18 2014-04-11 Method for washing laundry in a spray washing machine

Country Status (3)

Country Link
US (1) US20140310885A1 (fr)
EP (1) EP2792779B1 (fr)
PL (1) PL2792779T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211412A1 (fr) * 2016-06-08 2017-12-14 Arcelik Anonim Sirketi Lave-linge à efficacité de nettoyage améliorée et à rendement énergétique amélioré

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019209149A1 (de) * 2019-06-25 2020-12-31 BSH Hausgeräte GmbH Wäschepflegegerät mit einer Pumpvorrichtung und ein Verfahren zum Betreiben des Wäschepflegegeräts
KR20210004339A (ko) * 2019-07-04 2021-01-13 엘지전자 주식회사 세탁기의 제어방법

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559798A1 (fr) * 1984-02-17 1985-08-23 Esswein Sa Lave-linge dont la cuve contient de l'eau a une faible hauteur au-dessus du fond du tambour
US20060010613A1 (en) * 2004-07-19 2006-01-19 Lg Electronics Inc. Method of washing laundry in drum washing machine
US20070118997A1 (en) * 2005-08-23 2007-05-31 Choi Du H Washing machine
US20070283510A1 (en) * 2006-06-09 2007-12-13 Hoi Jin Jeong Washing machine and operating method thereof
EP1961854A1 (fr) * 2007-02-26 2008-08-27 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande de lavage
US20090089938A1 (en) * 2007-10-08 2009-04-09 Lg Electronics Inc. Method of controlling washing machine and washing machine
US20120151689A1 (en) * 2009-08-27 2012-06-21 Sang Il Hwang Control method of laundry machine
US20120180534A1 (en) * 2008-08-01 2012-07-19 Lg Electronics Inc. Control method of a laundry machine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1181078B (it) 1984-11-20 1987-09-23 Zanussi Elettrodomestici Macchina lavabiancheria
DE102008046465A1 (de) 2008-09-09 2010-03-11 Miele & Cie. Kg Verfahren zum Betreiben einer Waschmaschine und Waschmaschine
EP2246469B1 (fr) 2010-02-16 2012-07-11 V-Zug AG Procédé de functionnement d'un lave-linge et lave-linge doté d'une pompe à circulation et d'une phase d'essorage
KR101898489B1 (ko) 2012-02-07 2018-09-13 엘지전자 주식회사 세탁장치의 제어방법

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2559798A1 (fr) * 1984-02-17 1985-08-23 Esswein Sa Lave-linge dont la cuve contient de l'eau a une faible hauteur au-dessus du fond du tambour
US20060010613A1 (en) * 2004-07-19 2006-01-19 Lg Electronics Inc. Method of washing laundry in drum washing machine
US20070118997A1 (en) * 2005-08-23 2007-05-31 Choi Du H Washing machine
US20070283510A1 (en) * 2006-06-09 2007-12-13 Hoi Jin Jeong Washing machine and operating method thereof
EP1961854A1 (fr) * 2007-02-26 2008-08-27 Samsung Electronics Co., Ltd. Machine à laver et son procédé de commande de lavage
US20090089938A1 (en) * 2007-10-08 2009-04-09 Lg Electronics Inc. Method of controlling washing machine and washing machine
US20120180534A1 (en) * 2008-08-01 2012-07-19 Lg Electronics Inc. Control method of a laundry machine
US20120151689A1 (en) * 2009-08-27 2012-06-21 Sang Il Hwang Control method of laundry machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017211412A1 (fr) * 2016-06-08 2017-12-14 Arcelik Anonim Sirketi Lave-linge à efficacité de nettoyage améliorée et à rendement énergétique amélioré

Also Published As

Publication number Publication date
EP2792779A1 (fr) 2014-10-22
EP2792779B1 (fr) 2015-09-30
PL2792779T3 (pl) 2015-12-31

Similar Documents

Publication Publication Date Title
EP3385436B1 (fr) Procédé de drainage d'eau de machine à laver
CN105283597B (zh) 用于操作实现洗涤物的残留水分含量改进的洗衣机的方法以及适用于该方法的洗衣机
EP1785520B1 (fr) Méthode de contrôle pour un procéde détachage, utilisant les signaux d'un moteur.
RU2355835C1 (ru) Стиральная машина и способ управления режимом стирки стиральной машины
US9540756B2 (en) Laundry treating appliance and method of filling a laundry treating appliance with liquid
JP4163445B2 (ja) 洗濯乾燥機
US8381569B2 (en) Method and apparatus for determining load amount in a laundry treating appliance
US20140310885A1 (en) Method for washing laundry in a spray washing machine
US9840805B2 (en) Methods for determining load mass in washing machine appliances
JP2006198149A (ja) 乾燥機能付洗濯機
US9080273B2 (en) Method for the treatment of washing and program-controlled washing machine suitable therefor
BR102014020000A2 (pt) aparelho de tratamento de roupas para lavar e método de prever a degradação mecânica em um aparelho de tratamento de roupas para lavar
MX2007014348A (es) Estimacion de accion mecanica para maquinas lavadoras.
KR101203860B1 (ko) 세탁기의 세탁제어방법
CN108796981A (zh) 洗衣机及其控制方法
KR100751766B1 (ko) 드럼세탁기
EP2540901B1 (fr) Machine à laver à tambour et procédé de commande de lavage effectué par celle-ci
KR20200079935A (ko) 인덕션 히터를 갖는 세탁장치 및 이의 제어방법
CN107438684A (zh) 用于借助通过马达电流分析处理的泡沫探测来运行洗衣机的方法以及为此合适的洗衣机
US8321983B2 (en) Method for controlling a cycle of operation in a laundry treating appliance
US20150292137A1 (en) Methods for determining load mass and operating washing machine appliances
JP7204445B2 (ja) 洗濯機
KR100721834B1 (ko) 드럼세탁기의 탈수 제어방법
KR100698302B1 (ko) 드럼세탁기의 세탁제어방법
EP2610388B1 (fr) Sèche-linge et son procédé de contrôle

Legal Events

Date Code Title Description
AS Assignment

Owner name: WHIRLPOOL CORPORATION, MICHIGAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CIVANELLI, CLAUDIO;GUZMAN, SYLVIA;SIGNING DATES FROM 20140410 TO 20140423;REEL/FRAME:033033/0030

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION