EP0610877A1 - Improved washing machine - Google Patents

Improved washing machine Download PDF

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Publication number
EP0610877A1
EP0610877A1 EP94101872A EP94101872A EP0610877A1 EP 0610877 A1 EP0610877 A1 EP 0610877A1 EP 94101872 A EP94101872 A EP 94101872A EP 94101872 A EP94101872 A EP 94101872A EP 0610877 A1 EP0610877 A1 EP 0610877A1
Authority
EP
European Patent Office
Prior art keywords
washing machine
pump
tub
detergent
wash
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Withdrawn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
EP94101872A
Other languages
German (de)
English (en)
French (fr)
Inventor
Giovanni Spadoni
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.)
IAR-SILTAL SpA
Original Assignee
IAR-SILTAL 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 IAR-SILTAL SpA filed Critical IAR-SILTAL SpA
Publication of EP0610877A1 publication Critical patent/EP0610877A1/en
Withdrawn legal-status Critical Current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
    • 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 an improved washing machine. More in particular, this invention relates to an improved washing machine provided with devices suitable to rapidly dissolve the detergent, utilizing it without any dispersal.
  • washing machines for domestic use are provided with an horizontal axis, substantially cylindric wash-tub, where the washing fluid is caused to run into.
  • a rotatory basket is located, having a wall peripherally provided with a plurality of holes, in which basket the linen to be washed is placed.
  • the washing cycle takes place according to different methods, in the presence of a certain amount of water in the wash-tub.
  • washing methods consist respectively in washing by repeated immersion of the linen, which is made to rotate in the basket, or by aspersion, caused by the systematic fall of the fluid on the linen, or by means of water jets, sent against the drilled basket and starting in general from the bottom of the wash-tub.
  • detergent substances are added to the washing water, said substances being placed prior to the start of the cycle in a special cup provided in the washing machine.
  • the water delivery tube debouches into the aforementioned cup, whose opposite end is provided with an opening communicating with the wash-tub.
  • the water which runs into the washing machine impregnates the detergent contained in the cup and drags it towards the bottom of the wash-tub, where the granular or powdery detergent progressively dissolves, under the effect of the water movement caused by the rotation of the basket.
  • This system of detergent feed has a main drawback.
  • the detergent contained in the cup whose specific weight is generally higher than the one of water, is dragged by the latter towards the bottom of the wash-tub where the fluid discharge hole is generally provided. Therefore, a great amount of detergent is lost, being conveyed through said hole and settling in the portion of the discharge tube between the wash-tub and the pump.
  • a further drawback which is found in the known washing machines which utilize this system for introducing the detergent into the wash-tub lies in that detergents, especially the powdery or granular ones, require several tens minutes to completely dissolve and to be therefore capable of developing an efficacious activity on the linen. This latter drawback is especially noticeable in case of cold water washing or pre-washing cycles.
  • An object of this invention is to obviate the aforementioned drawbacks.
  • an object of this invention is to provide an improved washing machine equipped with devices suitable in the first place to prevent the dispersal through the discharge hole of part of the detergent introduced into the the wash-tub.
  • a further object of this invention is to provide an improved washing machine in which the dissolution of the detergent introduced into the wash-tub takes place in a very short time, even when washing or prewashing is made by cold water.
  • an improved washing machine comprising: a casing; a wash-tub housed in said casing; a rotatory drilled basket located in said wash-tub; a door for the introduction of linen into said basket; a cup for holding the detergent; a device for the delivery into said cup of the water flow coming from the waterworks; a device for feeding water from the cup to the washtub, a pump suitable for at least the discharge of the water, connected to the bottom of the tub by means of a mouthpiece, and a discharge tube connected at one end to said pump; wherein an hydraulic air vessel is connected to the opposite end of said discharge tube and is placed in correspondence of the upper part of the tub, and wherein the pump is pulse-driven to alternatively run into the vessel the water containing the detergent, which water runs back to the tub once the pump is disactivated.
  • Fig. 1 shows a schematic view of one preferred non limitative embodiment.
  • the improved washing machine subject matter of this invention comprises basically a casing (12), an horizontal axis wash-tub (14) housed inside said structure and a drilled basket (16) which rotates in said wash-tub (14).
  • the linen to be washed is introduced in said basket (16) in the usual manner, for instance through the front round door (18), or porthole, perimetrally circumscribed by a bellows-tight-sheath (20) of a known type.
  • the washing machine is also equipped with a traditional cup (22), of a known type, wherein the detergent is introduced before starting the washing and/or prewashing cycle.
  • Cup (22) is provided in its lower part with a delivery hole (24) which communicates with wash-tub (14).
  • Wash-tub (14) is provided in its lower part, opposite to that where the cup is located, with a mouthpiece (26) which connects said wash-tub with a discharge pipe (30).
  • Cup (22) is preferably dislocated on machine (10), so as to have its detergent delivery hole (24) substantially aligned with the axis of mouthpiece (26) of the underlying discharge pipe (30), integral with the tub bottom (14).
  • an hydraulic air vessel (34) is provided between the end of the discharge pipe (30) and manifold (32).
  • Said hydraulic air vessel (34) which may be of any shape and/or size, has preferably a capacity of between 0.5 and 2 liters.
  • said hydraulic air vessel (34) is constituted by a body from plastic material whose lower end is provided with a tang or the like for clutching pipe (30).
  • the hydraulic air vessel (34) may be integral with the aforementioned pipe (30), whose end is bagshaped during the moulding stage.
  • Two opposite tubes branch from the upper end of said hydraulic air vessel (34), which end is substantially opposite to the one connected to the discharge pipe (30).
  • One of the tubes which extends towards the outside of casing (12) is constituted by the aforementioned discharge manifold (32), to which a generic pipe from rubber or other suitable material (not shown) for the discharge of the washing water is connected.
  • the second tube (36), opposite relatively to the first one extends within casing (12) of the washing machine (10) and debouches in the detergent holding cup (22) to which it is connected through known means.
  • a generic valve or an electro-valve (38), which is activated when the washing water is discharged through manifold (32), is provided along tube (36).
  • the improved washing machine subject matter of this invention works as follows: The linen to be washed is placed in the drilled basket (16), while the detergent is introduced, prior to the start up, in cup (22). Once the machine is on, the water runs, through a generic not shown delivery tube, into cup (22), from which it runs out through the bottom hole (24), dragging the detergent with itself.
  • the latter dissolves partly in the water and falls partly to the bottom of tub (14), collecting in mouthpiece (26) communicating with pump (28).
  • the pulse-activated pump (28) sucks the fluid containing the detergent, conveying it, through pipe (30), to the hydraulic air vessel (34). In this way, a complete and rapid dissolution of the detergent is achieved.
  • valve (38) located along tube (36), remains open, to allow an adequate bleed of the hydraulic air vessel (34).
  • Pump (28) is preferably activated by short-duration pulses (for instance 1 to 10 Sec.), to prevent water from running out of manifold (32); to this aim, the duration of pulses and the capacity of the hydraulic air vessel (34) should be suitably gauged.
  • valve or electro-valve (38) closes and pump (28) is continuously activated for some minutes.
  • the washing solution once the cycle has ended, can in this way flow down through manifold (32) without running back into tub (14).
  • the improved washing machine subject matter of this invention allows in the first place to avoid detergent losses, as the detergent is conveyed into mouthpiece (26) of the discharge, mixed in pump (28) and in the hydraulic air vessel (34), and therefore recovered in full.
  • the amount of detergent to be used for every washing or prewashing cycle can be greatly reduced compared to the amounts usually required by the known washing machines, with ensuing remarkable reduction in working costs.
  • the detergent is immediately activated; as a consequence, the duration of each individual washing or prewashing cycle can be greatly reduced.
  • the dislocation in the washing machine of the various components which constitute the device for the full recovery and rapid dissolution of the detergent can be different from the one described and schematized by way of example.
  • the same device for the full recovery and rapid dissolution of the detergent could be mounted on machines loaded from above, of either domestic or industrial type.
  • the system for the full recovery and rapid dissolution of the detergent though being preferably suitable for washing machines, can be mounted also on other washing apparatuses, such as for instance dishwashers and the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP94101872A 1993-02-10 1994-02-08 Improved washing machine Withdrawn EP0610877A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI930231 1993-02-10
ITMI930231A IT1271947B (it) 1993-02-10 1993-02-10 Macchina lavabiancheria perfezionata

Publications (1)

Publication Number Publication Date
EP0610877A1 true EP0610877A1 (en) 1994-08-17

Family

ID=11364940

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101872A Withdrawn EP0610877A1 (en) 1993-02-10 1994-02-08 Improved washing machine

Country Status (2)

Country Link
EP (1) EP0610877A1 (it)
IT (1) IT1271947B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104600A1 (de) * 2006-03-14 2007-09-20 BSH Bosch und Siemens Hausgeräte GmbH Laugenabpumpstrang in einer waschmaschine
CN109957906A (zh) * 2017-12-22 2019-07-02 坎迪股份公司 洗衣机

Citations (3)

* 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
EP0332893A2 (en) * 1988-03-14 1989-09-20 A. MERLONI S.p.A. Method and device for economizing detergent, particularly for an automatic-cycle washing machine

Patent Citations (3)

* 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
EP0332893A2 (en) * 1988-03-14 1989-09-20 A. MERLONI S.p.A. Method and device for economizing detergent, particularly for an automatic-cycle washing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007104600A1 (de) * 2006-03-14 2007-09-20 BSH Bosch und Siemens Hausgeräte GmbH Laugenabpumpstrang in einer waschmaschine
CN109957906A (zh) * 2017-12-22 2019-07-02 坎迪股份公司 洗衣机
CN109957906B (zh) * 2017-12-22 2021-07-09 坎迪股份公司 洗衣机

Also Published As

Publication number Publication date
ITMI930231A1 (it) 1994-08-10
ITMI930231A0 (it) 1993-02-10
IT1271947B (it) 1997-06-10

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