EP0332893A2 - Procédé et dispositif pour économiser du détergent, en particulier pour une machine à laver automatique - Google Patents

Procédé et dispositif pour économiser du détergent, en particulier pour une machine à laver automatique Download PDF

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Publication number
EP0332893A2
EP0332893A2 EP89103080A EP89103080A EP0332893A2 EP 0332893 A2 EP0332893 A2 EP 0332893A2 EP 89103080 A EP89103080 A EP 89103080A EP 89103080 A EP89103080 A EP 89103080A EP 0332893 A2 EP0332893 A2 EP 0332893A2
Authority
EP
European Patent Office
Prior art keywords
pump
detergent
tub
water
microprocessor
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.)
Withdrawn
Application number
EP89103080A
Other languages
German (de)
English (en)
Other versions
EP0332893A3 (fr
Inventor
Antonio Merloni
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.)
A MERLONI SpA
Antonio Merloni SpA
Original Assignee
A MERLONI SpA
Antonio Merloni 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 A MERLONI SpA, Antonio Merloni SpA filed Critical A MERLONI SpA
Publication of EP0332893A2 publication Critical patent/EP0332893A2/fr
Publication of EP0332893A3 publication Critical patent/EP0332893A3/fr
Withdrawn legal-status Critical Current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
    • D06F33/00—Control of operations performed in washing machines or washer-dryers 
    • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
    • D06F33/32—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
    • D06F33/42—Control of operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of draining
    • 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
    • D06F39/085—Arrangements or adaptations of pumps
    • 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
    • D06F39/086—Arrangements for avoiding detergent wastage in the discharge conduit

Definitions

  • This invention relates to a method and device for economizing detergent for an automatic-cycle washing machine comprising a tub housing a rotary drum, a discharge pipe connecting said tub to a pump and into which a filter is connected, a delivery pipe the height of which exceeds the maximum level of the water fed into the tub, a device (distributor) with at least one compartment for the detergent, and means which connect said device to the tub for transfer of the detergent.
  • the wash cycle commences with water feed into the detergent distributor, removal of said detergent by the water and the entry of the mixture into the tub. As this latter has a bottom aperture it happens that during the filling operation a more or less large quantity of detergent comes to rest within the filter, the pump and the discharge and delivery pipes. This detergent fraction is no longer able to find its way into the circulating wash water and therefore represents a loss which is repeated for each wash cycle.
  • the devices which prevent the detergent entering the discharge pipe are of various types. Some of these use for example, in the discharge pipe, a float valve located at the entry of the discharge pipe into the tub. As this discharge pipe is closed by the float at the commencement of each cycle, the detergent which enters the tub together with the water is unable to fall further and therefore remains in the tub during the entire wash.
  • the filter is connected to the tub by two pipes (one being the discharge pipe). Because of the drum rotation during washing, water circulates within the two pipes and the water contained in the discharge pipe together with its dissolved detergent return to the tub.
  • the distributor water-feed valve and the pump are connected together. In this manner a fraction of the water is fed without detergent by said valve to the pump, and rises backwards from this latter within the discharge pipe to return the detergent into circulation within the tub.
  • An object of the present invention is to provide a simple method and means for economizing the detergent used in washing machines, said method and means neither involving particular constructional complications nor penalising the machine manufacturing costs, with the result that it can be marketed at the same price as conventional machines.
  • This method is implemented by a device characterised by comprising means to cause the pump to undergo pulse-operation.
  • the pump is operated with short-­duration pulses.
  • the pulse duration is chosen such that the water rises in the delivery pipe but without escaping therefrom.
  • the interruption pause ie the interval between one pulse and the next, enables the water to return to the interior of the tub and thus return therein the detergent which would otherwise be lost.
  • Figure 1 shows a washing machine 60 with which a detergent economizer device according to the present invention is associated.
  • Said machine 60 comprises substantially a tub 61 housing a rotary drum 62.
  • a pipe 63 extends from a detergent drawer or distributor 63 to said tub 61.
  • From the bottom of the tub 61 there extends a discharge pipe 3 in which there is connected a normal filtering member or filter 65.
  • Said pipe terminates at a pump 2 from which a delivery pipe 4 extends.
  • the pump is pulse-operated (for example with pulses lasting between 25/100 and 35/100 seconds separated by pauses lasting 1 second).
  • This operation is repeated several times during the wash stage (for example from 20 to 30 times) to obtain high recovery of the detergent dispersed in the wash water.
  • the pump 2 will urge the water mass present in the tub 61 and discharge pipe 3 into the delivery pipe 4 to a height exceeding the water level originally present in the tub. This height (for example 40-80 centimetres) is however insufficient to cause overflow from the pipe 4 of the water which has flown into it.
  • pump movement commences during the introduction of detergent into the tub 61 if, for example, this introduction occurs after detergent-free water has entered said tub to provide a water preload.
  • the device comprises a electronic circuit 1 acting on the washing machine pump 2 comprising the discharge pipe 3 from the tub (not shown in Figure 2) and the delivery pipe 4.
  • the electronic circuit 1 is connected to a programmer 5 comprising contacts 6, 7, 8, 9 relative to the different methods of operating the washing machine.
  • the contacts 6, 7, 8, 9 are contacted by a switch 10 from which there extends a branch 11 which at a node 12 is divided into two branches 13 and 14.
  • the branch 13 takes the signal from the programmer 5 and feeds it to a normal electronic circuit which controls the operation of the washing machine during all its operating stages.
  • the branch 14 feeds a signal V1, originating from the programmer 5, to a microprocessor 15 from which two branches 16 and 17 extend to connect it to a read-only memory (ROM) 18.
  • V1 originating from the programmer 5
  • ROM read-only memory
  • the branch 16 carries a signal V2 to the memory 18 and the branch 17 is a return branch which by means of a signal V3 enables the microprocessor 15 to act on the pump 2.
  • a branch 19 extends from the microprocessor 15 to an amplifier 20 connected by a branch 21 to a static switch 22, of which the biasing 23 and 24 is only indicated.
  • a branch 25 extends from said static switch 22 to act on the motor 26 of the pump 2 to enable it to operate.
  • the washing machine is in its wash stage with the water and detergent already present in the tub and in the discharge pipe 3.
  • the switch 10 is in contact with the contact 6.
  • the signal V1 reaches the microprocessor through the branch 14.
  • the signal V2 is now fed by said microprocessor to the read-only memory 18 which, depending on the present program, feeds the operation-enabling signal V3 to the microprocessor 15.
  • This microprocessor generates in the branch 19 an output V4 which after amplification by the amplifier 20 reaches the static switch 22 via the branch 21. In this manner, in the presence of the signal V4, said switch 22 closes to enable the motor 26 of the pump 2 to operate.
  • said pump 2 in the manner heretofore described, enables the water present in the pipe 32 and in the tub to pass into the delivery pipe 4.
  • this memory feeds a second signal along the branch 17 to the microprocessor 15 so as to interrupt the output signal V4 emitted by said microprocessor.
  • the microprocessor 15 there is no longer any signal present in the branch 19 and the static switch, not receiving any input signal from the branch 21, therefore reopens to stop the motor 26 of the pump 2.
  • FIG 3 shows diagrammatically a different embodiment of the device according to the present invention.
  • parts identical to those of Figure 1 are indicated by the same reference numerals, however the known electrical connections for powering the motor 26 of the pump 2 are not shown.
  • the device under examination comprises a timer 50 provided with a motor 51, on the output shaft 52 of which there is fixed an eccentric cam 53 which under particular conditions of angular rotation of the shaft 51 comes into contact with a terminal 54 of a branch 55 connected to the motor 26 of the pump 2.
  • the motor 26 of the pump 2 operates. Again in this case, following the operation and successive stoppage of the motor 26 of the pump 2, the water present in the pump 2 and in the pipes 3 and 4 associated with it behaves in an entirely identical manner to that described in relation to the device shown in Figure 1, this behaviour therefore not being described.
  • the pulse-­operation of the pump can be obtained manually. This can take place for example by means of a pushbutton positioned on the face of the washing machine, by which the user acts on the motor 26 of the pump 2 only when required.
  • the method of the present invention allows optimum detergent optimisation to be obtained with considerable simplicity of operation.
  • the device of the present invention does not require components to be installed in the machine additional to those required for its operation, with the result that the machine manufacturing costs and therefore market price are not penalised.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
EP89103080A 1988-03-14 1989-02-22 Procédé et dispositif pour économiser du détergent, en particulier pour une machine à laver automatique Withdrawn EP0332893A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1976588 1988-03-14
IT8819765A IT1216080B (it) 1988-03-14 1988-03-14 Metodo e dispositivo per economizzare detersivo, particolarmente per una macchina lavabiancheria a ciclo automatico.

Publications (2)

Publication Number Publication Date
EP0332893A2 true EP0332893A2 (fr) 1989-09-20
EP0332893A3 EP0332893A3 (fr) 1989-11-29

Family

ID=11161040

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103080A Withdrawn EP0332893A3 (fr) 1988-03-14 1989-02-22 Procédé et dispositif pour économiser du détergent, en particulier pour une machine à laver automatique

Country Status (3)

Country Link
EP (1) EP0332893A3 (fr)
IT (1) IT1216080B (fr)
NO (1) NO891068L (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610877A1 (fr) * 1993-02-10 1994-08-17 IAR-SILTAL S.p.A. Machine à laver améliorée
WO2008006665A1 (fr) * 2006-07-10 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Section de pompage de la lessive
CN111962257A (zh) * 2019-05-20 2020-11-20 Bsh家用电器有限公司 具有控制装置的洗涤物护理器具
US11530505B2 (en) * 2020-07-17 2022-12-20 Haier Us Appliance Solutions, Inc. System and method for detecting an elevated drain for a washing machine appliance

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099462A (en) * 1981-05-21 1982-12-08 Philips Nv Washing machine
GB2166163A (en) * 1984-10-25 1986-04-30 Bosch Siemens Hausgeraete Automatic washing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2099462A (en) * 1981-05-21 1982-12-08 Philips Nv Washing machine
GB2166163A (en) * 1984-10-25 1986-04-30 Bosch Siemens Hausgeraete Automatic washing machine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0610877A1 (fr) * 1993-02-10 1994-08-17 IAR-SILTAL S.p.A. Machine à laver améliorée
WO2008006665A1 (fr) * 2006-07-10 2008-01-17 BSH Bosch und Siemens Hausgeräte GmbH Section de pompage de la lessive
EA014488B1 (ru) * 2006-07-10 2010-12-30 Бсх Бош Унд Сименс Хаусгерете Гмбх Устройство для откачивания стирального раствора
CN101479422B (zh) * 2006-07-10 2011-03-23 Bsh博世和西门子家用器具有限公司 洗液泵出装置
CN111962257A (zh) * 2019-05-20 2020-11-20 Bsh家用电器有限公司 具有控制装置的洗涤物护理器具
EP3741899A1 (fr) * 2019-05-20 2020-11-25 BSH Hausgeräte GmbH Appareil d'entretien de linge doté d'une commande
CN111962257B (zh) * 2019-05-20 2023-10-03 Bsh家用电器有限公司 具有控制装置的洗涤物护理器具
US11530505B2 (en) * 2020-07-17 2022-12-20 Haier Us Appliance Solutions, Inc. System and method for detecting an elevated drain for a washing machine appliance

Also Published As

Publication number Publication date
IT8819765A0 (it) 1988-03-14
IT1216080B (it) 1990-02-22
EP0332893A3 (fr) 1989-11-29
NO891068D0 (no) 1989-03-13
NO891068L (no) 1989-09-15

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