EP0539617B1 - Unwuchtüberwachung für einen Waschautomaten - Google Patents

Unwuchtüberwachung für einen Waschautomaten Download PDF

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Publication number
EP0539617B1
EP0539617B1 EP91118534A EP91118534A EP0539617B1 EP 0539617 B1 EP0539617 B1 EP 0539617B1 EP 91118534 A EP91118534 A EP 91118534A EP 91118534 A EP91118534 A EP 91118534A EP 0539617 B1 EP0539617 B1 EP 0539617B1
Authority
EP
European Patent Office
Prior art keywords
unbalance
electric motor
rotational speed
control device
microswitch
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 - Lifetime
Application number
EP91118534A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0539617A1 (de
Inventor
Hans-Wilhelm Dipl.-Ing. Klein
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Priority to DE59107166T priority Critical patent/DE59107166D1/de
Priority to EP91118534A priority patent/EP0539617B1/de
Priority to ES91118534T priority patent/ES2080876T3/es
Priority to TR92/0993A priority patent/TR26544A/xx
Publication of EP0539617A1 publication Critical patent/EP0539617A1/de
Application granted granted Critical
Publication of EP0539617B1 publication Critical patent/EP0539617B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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 
    • D06F33/48—Preventing or reducing imbalance or noise
    • 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
    • D06F2103/26—Imbalance; Noise level

Definitions

  • the invention relates to an unbalance monitoring for a washing machine according to the preamble of claim 1; Such imbalance monitoring is generally known through prior public use.
  • the control device controls or regulates, among other things, the various operating speeds in the washing or applying or spinning mode; at the same time it monitors the functionality of the speed detection device, which supplies the actual values of the current speed of the electric motor. If an error in the drive, such as a line break or a short circuit, is detected, the motor is stopped immediately via the speed control element.
  • unbalance monitoring is to be made possible with a construction and production engineering expenditure which is substantially lower than with the known solutions become; the solution to this problem is possible, starting from a monitoring device of the type mentioned at the outset, by the teaching of claim 1; advantageous embodiments of the invention are the subject of the dependent claims; AC series motors or DC series motors, each with a commutator-fed rotor, are preferably provided as electric motors.
  • an unbalance monitor is provided with a speed detection device consisting of a rotor-side magnetic pole wheel and a stator-side Hall sensor with a digital output
  • the unbalance sensor is advantageously switched on in the output line (Out) of the Hall sensor, in particular as a microswitch that opens in the event of an impermissible unbalance.
  • the unbalance sensor can advantageously be designed for the relatively small current or voltage ratios of the signal of the speed detection device and, in particular, can advantageously be carried out on two connecting lines that are to be additionally provided and to be laid by a deflection sensor or on an addition that monitors the speed fluctuation Regulation or control device can be dispensed with, since the control device can switch off the drive and then attempt to restart only by interrupting the existing connection line to the speed detection device.
  • FIG. 1 shows an AC series motor fed from a single-phase AC network R, M P via a program control unit PS, a regulating or control device RV and a triac semiconductor circuit as an electric motor M with an armature winding AB connected via a commutator and for this purpose via one of the Program control unit PS actuable reversing switch reversible switchable excitation winding EF.
  • the control device RV is essentially given the speed setpoints and switching cycles with corresponding speeds and switching times for a washing, spin-up and spin operation by the program control device PS.
  • FIG. 2 shows a single-phase AC network R, M p via a regulating or control device RV and a triac semiconductor circuit Tr fed via a commutation choke KD, arranged in a rectifier bridge circuit D1-D4 and intended for a washing machine drive, a DC series motor as an electric motor M with an armature winding AB connected via a commutator motor and an excitation winding E; F1, F2 lying in series therewith and provided with a winding tap.
  • control with pulse width modulation can also be provided in a manner known per se.
  • a relay R1 that can be operated by the control device RV and a relay R2 that is also control-dependent by the control device RV are provided for reversing the direction of rotation.
  • the control device RV are as essential target values a particular direction of rotation and a certain speed is to n set for the intended here digital control.
  • a microswitch (MS) is now switched on in the circuit of the tachometer generator TG with the control device St in such a way that the tacho circuit is interrupted when the microswitch (MS) responds by opening when there is an impermissible unbalance, and thus the entire control unit RV Drive deactivated and e.g. can then be started again for a new start-up attempt.
  • FIG. 3 shows, as an alternative to FIGS. 1 and 2, instead of the tachogenerator TG which detects or monitors the speed, a magnetic pole wheel P which is coupled to the rotor shaft of the respective electric motor M and which has an associated stator-side Hall sensor IC which transmits signals proportional to the speed Regulatory or control device RV delivers.
  • an unbalance sensor is in turn switched on in the output line Out of the Hall sensor IC such that when the unbalance sensor responds, the output line is interrupted and the entire output is accordingly switched off via the regulating or control device RV.
  • the microswitch MS is integrated in a manner not shown in the electric motor M, in particular by arranging it on its end plate; Since the electric motor is relatively rigidly attached to the tub, the movements are transmitted to the microswitch with sufficient force if the elastically suspended tub is deflected too much.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP91118534A 1991-10-30 1991-10-30 Unwuchtüberwachung für einen Waschautomaten Expired - Lifetime EP0539617B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE59107166T DE59107166D1 (de) 1991-10-30 1991-10-30 Unwuchtüberwachung für einen Waschautomaten
EP91118534A EP0539617B1 (de) 1991-10-30 1991-10-30 Unwuchtüberwachung für einen Waschautomaten
ES91118534T ES2080876T3 (es) 1991-10-30 1991-10-30 Supervisor del desequilibrio en una lavadora automatica.
TR92/0993A TR26544A (tr) 1991-10-30 1992-10-09 BIR OTOMATIK CAMASIR MAKINESI ICIN OLAN DENKSIZLIK KONTROLü.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91118534A EP0539617B1 (de) 1991-10-30 1991-10-30 Unwuchtüberwachung für einen Waschautomaten

Publications (2)

Publication Number Publication Date
EP0539617A1 EP0539617A1 (de) 1993-05-05
EP0539617B1 true EP0539617B1 (de) 1995-12-27

Family

ID=8207291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118534A Expired - Lifetime EP0539617B1 (de) 1991-10-30 1991-10-30 Unwuchtüberwachung für einen Waschautomaten

Country Status (4)

Country Link
EP (1) EP0539617B1 (xx)
DE (1) DE59107166D1 (xx)
ES (1) ES2080876T3 (xx)
TR (1) TR26544A (xx)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6418581B1 (en) 1999-06-24 2002-07-16 Ipso-Usa, Inc. Control system for measuring load imbalance and optimizing spin speed in a laundry washing machine
DE10139388A1 (de) 2001-08-10 2003-02-27 Bsh Bosch Siemens Hausgeraete Wäschebehandlungsgerät mit Unwuchtüberwachung, mit Erkennung des Niveaus oder mit Erkennung der Beladung

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1585731B2 (de) * 1967-02-22 1972-05-31 Holzer, Walter, 7758 Meersburg Programmwahleinrichtung fuer automatische waschmaschinen
US4154898A (en) * 1976-09-27 1979-05-15 The Dow Chemical Company Absorbent articles and methods for their preparation
US4755562A (en) * 1986-06-10 1988-07-05 American Colloid Company Surface treated absorbent polymers
US5124188A (en) * 1990-04-02 1992-06-23 The Procter & Gamble Company Porous, absorbent, polymeric macrostructures and methods of making the same
CA2086031A1 (en) * 1992-01-28 1993-07-29 Shigeki Ueda Process for producing improved water absorbing resin and resin made by the same

Also Published As

Publication number Publication date
ES2080876T3 (es) 1996-02-16
DE59107166D1 (de) 1996-02-08
TR26544A (tr) 1995-03-15
EP0539617A1 (de) 1993-05-05

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