EP0107234B1 - Machine à laver le linge ou autre munie d'un dispositif indiquant la fin de vidange ou prévenant de son mauvais fonctionnement - Google Patents

Machine à laver le linge ou autre munie d'un dispositif indiquant la fin de vidange ou prévenant de son mauvais fonctionnement Download PDF

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Publication number
EP0107234B1
EP0107234B1 EP83201436A EP83201436A EP0107234B1 EP 0107234 B1 EP0107234 B1 EP 0107234B1 EP 83201436 A EP83201436 A EP 83201436A EP 83201436 A EP83201436 A EP 83201436A EP 0107234 B1 EP0107234 B1 EP 0107234B1
Authority
EP
European Patent Office
Prior art keywords
pump
rotor
water
stator
motor
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.)
Expired
Application number
EP83201436A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0107234A1 (fr
Inventor
Michel Steers
Jean-Pierre Hazan
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.)
Laboratoires dElectronique Philips SAS
Koninklijke Philips NV
Original Assignee
Laboratoires dElectronique et de Physique Appliquee
Philips Gloeilampenfabrieken NV
Koninklijke Philips Electronics NV
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 Laboratoires dElectronique et de Physique Appliquee, Philips Gloeilampenfabrieken NV, Koninklijke Philips Electronics NV filed Critical Laboratoires dElectronique et de Physique Appliquee
Publication of EP0107234A1 publication Critical patent/EP0107234A1/fr
Application granted granted Critical
Publication of EP0107234B1 publication Critical patent/EP0107234B1/fr
Expired 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • 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
    • D06F2103/44—Current or voltage
    • D06F2103/48—Current or voltage of the motor driving the pump

Definitions

  • the present invention relates to a washing machine or the like provided at the base of the washing tub with an assembly comprising an electric motor pump assembly with a common axis of rotation, substantially horizontal, coupled to one another, the coupling being carried out at the end of the axis of the rotor of the motor, which axis is movable laterally, the movement of the free end of said axis serving by the intermediary of an electrical conductor to control the running of the pump.
  • the water is drained by means of a centrifugal type water pump placed under the tank intended to receive the water, said pump being coupled to an electric motor, the coupling most often at the end of the axis of the rotor of this motor.
  • the machine program provides for an operating time of this pump for the pump to be drained effectively.
  • the time allocated by the program can be either too short or too long. If it is too short, the drain is incomplete, if it is too long, electrical energy is spent unnecessarily and the washing cycle is longer than necessary.
  • Another incident that occurs frequently is that the pump is primed during emptying, this phenomenon finding its cause in an overabundance of foam due to the detergent mixed with water or to a blockage at the entry of the pipes by dirt previously contained in the linen. Another incident may also relate to a defect in the pump itself. If the pump only works in relation to a time allocated by the program, these latest incidents may go unnoticed during the washing process.
  • Document DE-A-2631 344 describes a washing machine which comprises an assembly formed by a pump and an electric motor having the same axis of rotation which can move along its own axis of symmetry. But the two positions that the axis of rotation can take, therefore the rotor and the pump which are attached to it, are determined by the fouling of the pump in the form of waste surrounded around the axis of the pump.
  • the washing machine according to the invention is provided at the base of a tub with an assembly comprising, as according to the prior art, a drain pump-electric motor assembly with the same substantially horizontal axis of rotation coupled one to the other.
  • the electric motor comprising a stator and a rotor, the coupling being effected at the end of the axis of the motor rotor, the rotor being able to move axially relative to the stator thus creating a signal applied to cedit control members set of electric motor-pump and of operation control of the machine, and of control and operation control members comprising a central control member and an electrical contactor with two positions placed in an electrical circuit and actuated by the free end of the axis common to the pump and the motor during its movement.
  • the rotor is kept slightly off-center with respect to the stator in the axial direction using a spring, and when the drain pump is in operation, the axis of the rotor and the pump can move in the axial direction in two positions, one of which opposes the force developed by the spring, the off-center position, corresponding to the operation under load of the pornpe, that is to say -to say with water admission into the pump, the other position, substantially centered, corresponds to the no-load operation of said pump, that is to say without water admission into the pump, the signal emerging in the circuit electric, in case of non admission of water into the pump, intervening, via the control unit, on the operation of the drain pump, and when this said signal appears, the control unit receives water level information from a placed water level detector in the machine tank, and triggers an alarm signal when the water level is not close to zero.
  • this washing machine allows to devote the minimum of time and energy to the emptying phases. In addition, it provides information on the reality of the emptying, even in the event that the pump flow rate is not observed.
  • the invention is based on the well-known effect known as "solenoidal stator on the rotor which wants it to move axially, if the mechanical construction of the motor allows, inside the stator depending on the magnetic flux in the engine therefore of the mechanical load applied to it. According to the case of the invention, this load varies between two values, namely those corresponding to the resistive torque applied to the motor, respectively if water is admitted or not admitted into the pump.
  • control unit is a microprocessor.
  • FIG 1 is shown along 11, the stator of an electric motor and according to 12, its rotor.
  • the axis of the rotor is 13 whose rotation is ensured by means of the bearings 14 and 15. This axis can also slide longitudinally in these bearings.
  • At this end of the axis 16 is coupled the drain pump of the washing machine, the washing tank of which is 18.
  • This coupled motor and pump assembly is arranged below this tank, the connection between tank and pump effecting by the flexible and deformable pipe 19.
  • the pumped water is evacuated by the pipe 20.
  • a helical spring 49 coaxial with the axis 13, is interposed between the bearing 15 and the rotor 12 so that when stopped the rotor 12 is eccentric relative to the stator 11.
  • the other end 21 is coupled to a two-position switch inserted in an electrical circuit.
  • This coupling is shown diagrammatically in the figure using the rod 22 linked to 13, assumed to be electrically insulating and articulated at 23 with the rod 24 assumed to be conductive and linked to the movable conductive stud 25.
  • the rod 24 is movable around the fixed stud 26 so that, when the axis moves, the stud 25 can come into contact with one of the fixed studs 27 or 28 brought to different electrical potentials, for example + 5V and 0 (potential of the mass of the machine).
  • a spring 49 is interposed between the bearing 15 and the rotor 12 so that, when stopped, and-when the pump motor is not supplied, the rotor is pushed to the right of the figure and the pad 25 is in contact with pad 28.
  • the rotor undergoes the well-known solenoid effect (see for example United States patent No. 2,869,008) according to which the rotor is attracted to the center of the stator, the displacement being a function of the magnetic flux through the motor and the mechanical load applied to the rotor.
  • the elasticity of the spring 49 is such that, without admitting water into the pump, the rotor is centered in the middle of the stator, the stud 25 coming into contact with the stud 27, while in in the case of water intake and of the resistant mechanical load appearing on the axis of the rotor, the latter remains off-center with respect to the stator, the studs 25 and 28 remaining in contact.
  • the end of a water intake in the pump is therefore marked by a variation of the potential of 26 from the value 0 to 5 V.
  • the signal coming from the pad 26, due to the displacement of the pad 25 from the fixed pad 28 to the fixed pad 27, is applied to the central control member 29 of the machine, which will intervene on the supply of the pump motor.
  • the decentering of the rotor can be obtained using a spring identical to 49 which, instead of being placed between the bearing 15 and the rotor 12, is placed between the bearing 14 and the rotor 12, the decentering taking place in the other direction, the control switch at the end of the axis having a configuration reversed with respect to that of FIG. 1.
  • FIG. 2 using the block diagram shows how the signal from 26.
  • the rectangle 29 represents the central control member which is for example a microprocessor.
  • the rectangle 17 represents the drain pump coupled to the rotor of the motor 12 of which the axis 13 has been shown.
  • 32 represents the two-position switch controlled by the end 21 of the axis 13. Inside this housing , it has been assumed that the pads 27 and 28 are brought to the potential respectively of for example +5 V and 0.
  • the rectangle 34 represents a water level recorder in the tank measured using the probe 9 indicated on the Figure 1 and of a type known from the prior art.
  • the rectangle 33 represents the supply of the motor.
  • Lines 35, 36, 37 indicate the electrical connections between the central control member 29 and the other elements.
  • Line 41 indicates the electrical connection between the power supply and the pump motor.
  • the arrows 39 and 38 directed towards microprocessor 29 indicate that the latter receives information, while the arrow 40 from 29 indicates that the latter emits a control signal.
  • the rotor When the engine is running and the water intake takes place normally in the pump, which corresponds to a draining in progress, the rotor is eccentric in the stator and 25 is in contact with 28. A signal at the level logic 0 (mass) is sent according to 36 to microprocessor 29. If water is no longer admitted to the pump, the rotor is centered in the middle of the stator and 25 is in contact with 27. A logic signal 1 ( +5 V) is sent according to 36 to the microprocessor 29.
  • the doubt is removed using 34 which measures the water level in the tank and which sends the information concerning this level to 29. If this information is that the water level is close to zero, the microprocessor sends then a signal according to 37 of interruption of the supply 33 of the pump motor. If this information is that the water level is not close to zero, this is an indication of a draining incident.
  • the microprocessor will give for example the order, via the power supply of the motor, to reduce the speed of the latter in order to attempt a re-priming of the pump, or else the order to means, not shown, of triggering an alarm warning of the emptying incident.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP83201436A 1982-10-11 1983-10-07 Machine à laver le linge ou autre munie d'un dispositif indiquant la fin de vidange ou prévenant de son mauvais fonctionnement Expired EP0107234B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216999 1982-10-11
FR8216999A FR2534287B1 (xx) 1982-10-11 1982-10-11

Publications (2)

Publication Number Publication Date
EP0107234A1 EP0107234A1 (fr) 1984-05-02
EP0107234B1 true EP0107234B1 (fr) 1987-09-09

Family

ID=9278148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201436A Expired EP0107234B1 (fr) 1982-10-11 1983-10-07 Machine à laver le linge ou autre munie d'un dispositif indiquant la fin de vidange ou prévenant de son mauvais fonctionnement

Country Status (4)

Country Link
EP (1) EP0107234B1 (xx)
JP (1) JPS5990595A (xx)
DE (1) DE3373505D1 (xx)
FR (1) FR2534287B1 (xx)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4913625A (en) * 1987-12-18 1990-04-03 Westinghouse Electric Corp. Automatic pump protection system
TR199700528A3 (tr) * 1997-06-20 1999-10-21 Arcelik A.S. Elektrikli ev aletlerinde kullanilan tahliye pompalari için elektronik kontrol yöntemi.
US9840803B2 (en) 2015-10-20 2017-12-12 Haier Us Appliance Solutions, Inc. Pump assembly for appliance

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2562772A (en) * 1945-04-14 1951-07-31 Westinghouse Electric Corp Dishwashing apparatus having impeller-operated means for controlling water supply
US2592314A (en) * 1948-01-31 1952-04-08 Westinghouse Electric Corp Cleaning apparatus
US2869008A (en) * 1957-05-08 1959-01-13 Molon Motors And Coil Corp Induction motor armature control
FR1336973A (fr) * 1962-10-03 1963-09-06 Constructa Werke Gmbh Pompe double destinée particulièrement à une machine à laver et à centrifuger, fonctionnant en courant continu
FR2086857A5 (xx) * 1970-04-10 1971-12-31 Penarroya Miniere Metall
DE2631344A1 (de) * 1976-07-13 1978-01-19 Philips Patentverwaltung Vorrichtung zur anzeige der verschmutzung der pumpe einer waschmaschine oder waescheschleuder
DD142902A1 (de) * 1979-04-11 1980-07-16 Henry Bochmann Einrichtung zur verhinderung von waschmittelverlusten

Also Published As

Publication number Publication date
EP0107234A1 (fr) 1984-05-02
DE3373505D1 (en) 1987-10-15
FR2534287A1 (xx) 1984-04-13
JPS5990595A (ja) 1984-05-25
FR2534287B1 (xx) 1984-11-23

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