EP0555656A1 - Regelung der Strömungsmenge von Waschmittel in Kleiderwaschmaschinen - Google Patents

Regelung der Strömungsmenge von Waschmittel in Kleiderwaschmaschinen Download PDF

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Publication number
EP0555656A1
EP0555656A1 EP93100643A EP93100643A EP0555656A1 EP 0555656 A1 EP0555656 A1 EP 0555656A1 EP 93100643 A EP93100643 A EP 93100643A EP 93100643 A EP93100643 A EP 93100643A EP 0555656 A1 EP0555656 A1 EP 0555656A1
Authority
EP
European Patent Office
Prior art keywords
washing
cam
wash liquor
flow rate
conduit
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.)
Granted
Application number
EP93100643A
Other languages
English (en)
French (fr)
Other versions
EP0555656B1 (de
Inventor
Giuseppe Frucco
Fernando Russo
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.)
Electrolux Zanussi Elettrodomestici SpA
Original Assignee
Electrolux Zanussi Elettrodomestici SpA
Zanussi Elettrodomestici 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 Electrolux Zanussi Elettrodomestici SpA, Zanussi Elettrodomestici SpA filed Critical Electrolux Zanussi Elettrodomestici SpA
Publication of EP0555656A1 publication Critical patent/EP0555656A1/de
Application granted granted Critical
Publication of EP0555656B1 publication Critical patent/EP0555656B1/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
    • 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

Definitions

  • the present invention relates to a quick-action arrangement of a simple type for regulating the flow rate of the wash liquor circulating through a clothes washing machine, in particular a clothes washing machine or a combined clothes washing and drying machine equipped with a provision to recirculate the wash liquor from the lower portion to the upper portion of the washing tub in view of spraying said liquor onto the clothes being contained in the drum rotating inside said washing tub.
  • Clothes washing machines of the above specified type are known from the prior art, which substantially comprise a conduit for recirculating the wash liquor, said conduit including a circulation pump and communicating with one of its ends with a liquor collecting vessel, which houses at least an electric heating element and is connected with the lower portion of the washing tub of said washing machines, as well as being connected with its other end with the upper portion of said washing tub and a liquor spraying device fastened thereto, said liquor spraying device being arranged to direct the washing liquor in form of spray jets on the clothes contained in the perforated drum rotating inside the washing tub.
  • the wash liquor contained in the washing tub, and used to wet the clothes to be washed is repeatedly recirculated by the circulation pump through said recirculation conduit at a flow rate which is substantially constant.
  • Said liquor which is filled at different, pre-determined levels in the washing tub in accordance with the actual amount of clothes being loaded in the drum, is then sprayed onto the clothes in the drum, thereby causing then to be washed in an effective way.
  • This flow rate regulation arrangement is substantially based on the principle of varying the in-flow cross-section of the recirculating conduit for the washing liquor, using to this purpose a system which differs from all known ones that are used to regulate the flow rate of liquid-carrying conduits, such as for instance the ones consisting of pumps with electronic phase-shift control, fluid shut-off or throttling organs controlled by electromagnetic valves or electromechanical actuators of various types.
  • the flow-rate regulation arrangement is shown schematically as being installed in a clothes washing machine, in particular a clothes washing machine or a combined clothes washing and drying machine, comprising a washing tub and a rotating drum housed inside said tub, as well as comprising a conduit (only a portion of which being shown in the Figure, as indicated by the reference numeral 1) for recirculating the washing liquor, which is provided with a recirculating pump and communicates with one of its ends with a washing-liquor collecting vessel housing at least an electric heating element and connected with the lower portion of said washing tub, said conduit being connected with its other end with the upper portion of said washing tub and a spraying device fastened thereto so as to direct the washing liquor circulated through said recirculating conduit in form of spray jets onto the clothes contained in the perforated drum rotating inside the washing tub, thereby wetting the clothes and, as a consequence, promoting the soil removal effect as the machine goes through the washing process according to the cycle selected by the user (the remaining ones among the various component parts
  • the flow-rate regulation device is associated with an arrangement provided to control detergent dispensing, which is similar to the one described in the Italian patent application no. PN 91A000012, filed by the same applicant on February 27, 1991, and which essentially consists of a rotary selector means installed in a detergent dispenser and actuatable selectively by a linkage into different positions.
  • the water is let into this dispenser and caused to flow through the various compartments that are provided there to contain the different detergents required for the washing process, so that it is able to flush off these detergents and carry them into the washing tub.
  • the displacement of said rotary selector means into its various operational positions is controlled by the electronic microprocessor of the washing machine, which also is arranged to automatically identify said operational positions of the selector means.
  • An electromechanical actuator means 2 of the type described in the afore cited patent application PN 91A000012, and rotatably actuatable by the electronic microprocessor means of the machine, can be viewed in the illustration shown in the Figure, said actuator means including the above mentioned control device and comprising a first profiled cam 3 adapted to cause the linkage 4 and, therefore, the rotary selector means (not shown) to be displaced into its various operational positions, as well as a second profiled cam 5 which is made coaxially in a single piece with said first cam, both cams being integral with the horizontal rotating shaft 6 of the actuator means 2.
  • the first cam 3 is made with dimensions that are larger than those of said other cam; furthermore, it has such an outer profile as to enable the rotary selector means to be displaced into four different operational positions to cater for the corresponding pre-wash, main wash, rinsing/fabric conditioning and rinsing/bleaching phases making up the washing cycles that are each time selected by the user to handle the different washloads.
  • the second cam 5 has, in turn, a properly contoured outer profile, on which is slidably resting a cam follower 7 that is fixed to an end of a rectilinear lever 8 provided with a central slot 9 for insertion onto the rotating shaft 6 of the actuator means 2, said lever being capable to slide alternately along a linear pattern in the two mutually opposing directions A and B, and said lever being further appropriately shaped at its other lower free end so as to close in around the recirculation conduit 1 of the washing machine.
  • Said second cam 5 in the case being considered here, is shaped with an outer profile comprising three arcuate portions 10, 11 and 12, as well as a rectilinear portion 13, all of them flowingly joined to each other.
  • the arcuate portion 10 has a curvature radius which is smaller than the curvature radius of the remaining arcuate portions 11 and 12, which in turn have practically identical curvature radii.
  • cam may also be provided with outer profiles that are different from the above described one, without departing from the scopes of the present invention.
  • both profiled cams 3 and 5 are actuated to turn in the same direction of rotation, so that while the cam 3 causes the rotary selector means to be displaced into its different operational positions through the linkage 4, the cam 5 acts to alternately displace, through said cam follower 7, the lever 8 in either one or the other one of its two rectilinear displacement directions A and B, thanks to said rotating shaft 6 of the actuator means 2 being slidingly engaged in the slot 9 provided in said lever, according to the portion of cam surface on which said cam follower is resting each time.
  • the lever 8 is kept by gravity in its lowered position (as shown in the Figure), wherein the free end of said lever is not causing the recirculation conduit 1 of the washing machine to be squeezed to any extent, ie. a condition in which the washing liquor circulates through said conduit at its highest flow rate, in the flow direction indicated by the arrow D, toward the spraying device of the same washing machine.
  • said recirculation conduit 1 By appropriately dimensioning the travelling distance of the lever 8 in accordance with the outer profile of the cam 5, it is thus possible for said recirculation conduit 1 to be squeezed to different extents, thereby varying within pre-determined limits the flow rate and, as a consequence, the pressure of the washing liquor circulating through said recirculation conduit, ie. generating variable liquor recirculation flow rates and spraying pressures so as they are required to ensure greater effectiveness in washing the clothes during the various phases of each laundering process selected by the user to handle particular washloads.
  • a normal flow rate of the washing liquor is achieved when the lever is fully displaced in the direction A, ie. in its fully lowered position, whereas the flow rate of the washing liquor is reduced by 50 percent when said lever is fully displaced in the direction B, ie. in its fully lifted position.
  • both cams 3 and 5 are linked to each other with such an angular displacement as to cause the flow rate of said washing liquor in the recirculation conduit to be always varied within the pre-determined limits in the specially intended phases of each washing process selectable by the user.
  • this arrangement is provided with a rotary electrical contact 14 which is associated coaxially with said first cam 3, said contact being built onto an electrical printed-circuit board provided with a plurality of electrically conductive tracks (not shown), which are arranged concentrically and are separated from each other, and capable of being actuated rotatably, in step with the corresponding rotation of both cams 3 and 5, so as to cause different electrical contacts, which are each time identified by the electronic microprocessor means of the washing machine and are associated with said rotary contact and said conductive tracks, to close in due time and sequence so as to also enable the respective operational position of the regulation arrangement considered to be identified.
  • the flow-rate regulation arrangement built according to the afore illustrated way is therefore effective in enabling the flow rate, and therefore the pressure with which the washing liquor is sprayed onto the clothes, to be advantageously regulated during the progress of any laundering process selected to wash woollens, cottons and/or synthetics, with a resulting improvement in the effectiveness with which soil is actually removed from the clothes being washed.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Control Of Washing Machine And Dryer (AREA)
EP93100643A 1992-02-11 1993-01-18 Regelung der Strömungsmenge von Waschmittel in Kleiderwaschmaschinen Expired - Lifetime EP0555656B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPN920010A IT1259202B (it) 1992-02-11 1992-02-11 Dispositivo di regolazione della portata del liquido di lavaggio per macchina lavatrice di biancheria
ITPN920010 1992-02-11

Publications (2)

Publication Number Publication Date
EP0555656A1 true EP0555656A1 (de) 1993-08-18
EP0555656B1 EP0555656B1 (de) 1996-07-24

Family

ID=11394623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93100643A Expired - Lifetime EP0555656B1 (de) 1992-02-11 1993-01-18 Regelung der Strömungsmenge von Waschmittel in Kleiderwaschmaschinen

Country Status (4)

Country Link
EP (1) EP0555656B1 (de)
DE (1) DE69303736T2 (de)
ES (1) ES2092141T3 (de)
IT (1) IT1259202B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014030592A (ja) * 2012-08-03 2014-02-20 Toshiba Corp 洗濯機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959822C (de) * 1955-05-10 1957-03-14 Siemens Ag Vorrichtung zur Steuerung von Ventilen in Wasserleitungen bei Waschmaschinen
US3129574A (en) * 1962-11-16 1964-04-21 Ametek Inc Washer-extractor having a dump valve operated by the means that effects the change of basket speed
DE1811106A1 (de) * 1968-11-22 1970-06-04 Siemens Elektrogeraete Gmbh Zulaufventil fuer Wasch- oder Geschirrspuelmaschinen
EP0335485A2 (de) * 1988-02-09 1989-10-04 FISHER & PAYKEL LIMITED Durchflussregelsysteme und/oder Waschmaschinen ausgestattet mit solchen Durchflussregelsystemen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959822C (de) * 1955-05-10 1957-03-14 Siemens Ag Vorrichtung zur Steuerung von Ventilen in Wasserleitungen bei Waschmaschinen
US3129574A (en) * 1962-11-16 1964-04-21 Ametek Inc Washer-extractor having a dump valve operated by the means that effects the change of basket speed
DE1811106A1 (de) * 1968-11-22 1970-06-04 Siemens Elektrogeraete Gmbh Zulaufventil fuer Wasch- oder Geschirrspuelmaschinen
EP0335485A2 (de) * 1988-02-09 1989-10-04 FISHER & PAYKEL LIMITED Durchflussregelsysteme und/oder Waschmaschinen ausgestattet mit solchen Durchflussregelsystemen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014030592A (ja) * 2012-08-03 2014-02-20 Toshiba Corp 洗濯機

Also Published As

Publication number Publication date
DE69303736T2 (de) 1996-11-28
ITPN920010A0 (it) 1992-02-11
IT1259202B (it) 1996-03-11
ES2092141T3 (es) 1996-11-16
DE69303736D1 (de) 1996-08-29
ITPN920010A1 (it) 1993-08-11
EP0555656B1 (de) 1996-07-24

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