EP0401923A1 - Waschmaschine mit einer Waschlaugenumwälzvorrichtung - Google Patents

Waschmaschine mit einer Waschlaugenumwälzvorrichtung Download PDF

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Publication number
EP0401923A1
EP0401923A1 EP90201416A EP90201416A EP0401923A1 EP 0401923 A1 EP0401923 A1 EP 0401923A1 EP 90201416 A EP90201416 A EP 90201416A EP 90201416 A EP90201416 A EP 90201416A EP 0401923 A1 EP0401923 A1 EP 0401923A1
Authority
EP
European Patent Office
Prior art keywords
washing machine
washing
tub
fact
casing
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Withdrawn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
EP90201416A
Other languages
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.)
OCEAN SpA
Original Assignee
OCEAN 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 OCEAN SpA filed Critical OCEAN SpA
Publication of EP0401923A1 publication Critical patent/EP0401923A1/de
Withdrawn legal-status Critical Current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
    • D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
    • D06F34/14—Arrangements for detecting or measuring specific parameters
    • D06F34/22—Condition of the washing liquid, e.g. turbidity
    • D06F34/24—Liquid temperature
    • 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 
    • D06F39/04—Heating arrangements
    • 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
    • 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
    • D06F2103/52—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to electric heating means, e.g. temperature or voltage

Definitions

  • a general scope of this invention is to provide a washing machine with a water recycling device with innovatory features whereby, according to another of the scopes of this invention, it is advantageously possible to limit, to the point of reducing to only one, the holes in the tub necessary for connecting water inlet and outlet pipes, pressure switches, insertion of the heating element, thermostats, etc., thereby limiting or preventing wet seal problems in the tub and resulting, moreover, in structural simplicity and ease of assembly, especially in view of the automated assembly of the parts making up the washing machine.
  • a washing machine comprising a substantially cylindrical horizontal tub containing the washing liquid, inside which rotates a peripherally perforated drum containing the washing, characterized by the fact that the lower part of the lateral wall of the tub is provided with an aperture around which is tightly fitted a casing with an intake duct and a delivery duct passing through the aperture, communicating with each other, outside the tub, by means of a pump for recycling the washing liquid.
  • a washing machine comprises a substantially cylindrical horizontal perforated rotating drum 20 contained in a tub 13, which is tightly and removably fitted from below (by known systems: for example, a flange secured with screws and interposed seals 17), in correspondence with a hole 14, with a jet device generically indicated by reference 10.
  • This device comprises a casing internally provided with a duct 12, defining a hollow space 15, with a lower aperture close to one wall of the casing 11 carrying an electric motor with a drive shaft 19 coaxial to the the lower aperture of the duct and with a suitably shaped impeller 23 keyed onto it, so as to obtain, as is intuitable by anyone expert in the field, a pump with its intake in correspondence with the hole 14 and delivery at the upper end of the duct 12, extending inside the tub and close to the drum 20.
  • the casing 11 constitutes the intake pipe and the duct 12 constitutes the delivery pipe of the pump.
  • the casing 11 Close to its bottom the casing 11 is provided with a pipe union 16, opening out into the hollow space 15, which couples with a discharge pipe 18.
  • a washing machine made according to the invention makes it possible to obtain various functional advantages.
  • This jet of water passes through the holes in the rotating drum reaching the washing and thus soaking it.
  • the pressure switch is connected, as is easly imaginable by the technician, so as to maintain the level 21 substantially constant by activating the water inlet to introduce water from the outside as the washing gradually absorbs it, the quantity of water used for a washing phase is substantially identical to that required for completely soaking the washing.
  • the level 21 remains constant and the introduction of water from the outside is interrupted by the pressure switch. It is thus possible to save a considerable quantity of water and, consequently, of energy both for heating it and for control.
  • the action of the jet of water on the washing helps the detergent action thus enabling the washing time to be shortened.
  • Other phases for example, the rinsing phase
  • a washing machine made according to the invention also makes it possible to advantageously limit the number of holes in the tub by using the suitably shaped casing of the device to connect other parts of the system of the washing machine in addition to the discharge pipe 18.
  • a washing machine comprising a perforated rotating drum 120 contained in a tub 113 is tightly and removably fitted (for example, by means of a screw coupling flange and interposed seal 117), in corresponding with a lower aperture 114 in the tub, with a device generically indicated by reference 110.
  • Said device 110 comprises a casing 111 internally provided with a duct 112 with its lower inlet close to the bottom of the latter and its upper end extending inside the tub and close to the drum 120, so as to define a path with an inlet on the bottom of the tub and an outlet from the upper end of the duct 112 close to the drum.
  • Each pipe fitted to the device enables one less hole to be made directly in the tub.
  • Housings are also provided in the casing 111 for fitting thermostats 125 and 126 which measure the temperature of the flow of liquid in the device.
  • a heating element 124 is disposed along the fluid path in the device, for example (as shown schematically in figure 2) wound spiral-fashion around the duct 112, and its electrically connecting ends protrude from the casing 111 in correspondence with airtight passages.
  • an electric motor 122 with a shaft 119 coaxially disposed in the duct 112 and fitted with an impeller 123 shaped so as to generate when operated an upward flow of water in the duct 112 which thus constitutes the delivery pipe of the pump composed of the impeller 123, while the casing 111 constitutes the intake pipe.
  • the embodiment of figure 2 offers other important advantages such as limiting the apertures in the tub for installation of the washing machine to only one hole 114, resulting in obvious advantages in terms of hydraulic seal of the tub, as well as limiting the mechanical operations necessary for producing the latter.
  • the tub can easily be made cylindrical in shape with the drum coaxial since it is no longer necessary to provide space for the heating element, which is normally positioned between the tub and the drum. This also facilitates the automated assembly of the components of the washing machine.
  • the circulation of water, sucked up by the hole 114 and expelled by the upper end of the duct 112 prevents deposits of detergent from forming (as does the device of figure 1) and enables it to dissolve more rapidly and evenly as it flows through the duct.
  • lime deposits are prevented from forming on the heating element 124 and, since said heating element comes into contact with water moving under pressure, it can be made with a lower size/power ratio, thus advantageously economizing on space with respect to a heating element of equal power used in a washing machine of known technique.
  • the quantity of type of connections on the casing of the device can be varied and differ from those shown in the figures, so as to form a device which acts as a connection between the tub and all or only some of the components of the hydraulic circuit and carrying only some or all of the components of the thermal circuit such as heating elements and thermostats, also in relationto the desired dimensions of the device.
  • the shape of the jet device can differ from the one shown in the figures.
  • the part which sucks up water from the tub and the part which expels it in a jet need not necessarily be coaxially disposed: if necessary, the casing of the device need not coincide with the intake duct of the pump and the two intake and delivery pipes may be disposed side by side inside said casing and connected to the bottom of the tub by means of least one aperture.
  • a lateral disposition of the motor is advantageous due to the limited vertical dimensions thus obtained, and this disposition can obviously also be applied to the device with several connections, such as the type shown in figure 2, just as the opposite also obviously applies, that is to say, a disposition as shown in figure 2 applied to the device of the type shown in figure 1.
  • the pump for obtaining the circulation of water through the device can be of any other known type, as is easily imaginable by anyone expert in the field.
  • the duct 112 can, for example, be advantageously made (together with or separate from the rest of the device) of cast aluminium (or other high thermally conductive material) with the heating element 124 directly incorporated in it.
  • the casing of the device and the duct inside it can be moulded from plastic, also in one piece.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
EP90201416A 1989-06-07 1990-06-05 Waschmaschine mit einer Waschlaugenumwälzvorrichtung Withdrawn EP0401923A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8920806A IT1230395B (it) 1989-06-07 1989-06-07 Lavabiancheria con dispositivo di ricircolo del liquido di lavaggio.
IT2080689 1989-06-07

Publications (1)

Publication Number Publication Date
EP0401923A1 true EP0401923A1 (de) 1990-12-12

Family

ID=11172334

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90201416A Withdrawn EP0401923A1 (de) 1989-06-07 1990-06-05 Waschmaschine mit einer Waschlaugenumwälzvorrichtung

Country Status (2)

Country Link
EP (1) EP0401923A1 (de)
IT (1) IT1230395B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159911A2 (de) * 2000-05-30 2001-12-05 Electrolux Zanussi S.p.A. Waschmaschine mit einem Durchlaufwassererhitzer
FR2818669A1 (fr) * 2000-12-26 2002-06-28 Ciapem Dispositif permettant de realiser une recirculation de fluide destine notamment a un lave-linge
WO2007053041A1 (en) * 2005-11-04 2007-05-10 Fisher & Paykel Appliances Limited Integrated washing machine pump
ITMC20090150A1 (it) * 2009-06-22 2010-12-23 Meccanica Generale Srl Macchina lavatrice o lavasciugatrice con sistema di ricircolo.
US20150191861A1 (en) * 2012-07-19 2015-07-09 Indesit Company S.P.A. Washing machine provided with a recirculation circuit
CN106637838A (zh) * 2017-01-13 2017-05-10 无锡小天鹅股份有限公司 用于洗衣机的加热水循环装置和洗衣机
CN106757957A (zh) * 2017-01-13 2017-05-31 无锡小天鹅股份有限公司 洗衣机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406155A (en) * 1973-05-08 1975-09-17 Tappan Co Heat system for dishwasher
FR2554467A3 (fr) * 1983-11-08 1985-05-10 Zanussi A Spa Industrie Lave-linge equipe d'un dispositif de vidange perfectionne
DE3820409A1 (de) * 1988-06-15 1989-12-21 Bosch Siemens Hausgeraete Vorrichtung zum umwaelzen von wasch- oder spuellauge in einer trommelwaschmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1406155A (en) * 1973-05-08 1975-09-17 Tappan Co Heat system for dishwasher
FR2554467A3 (fr) * 1983-11-08 1985-05-10 Zanussi A Spa Industrie Lave-linge equipe d'un dispositif de vidange perfectionne
DE3820409A1 (de) * 1988-06-15 1989-12-21 Bosch Siemens Hausgeraete Vorrichtung zum umwaelzen von wasch- oder spuellauge in einer trommelwaschmaschine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1159911A2 (de) * 2000-05-30 2001-12-05 Electrolux Zanussi S.p.A. Waschmaschine mit einem Durchlaufwassererhitzer
EP1159911A3 (de) * 2000-05-30 2002-08-28 Electrolux Zanussi S.p.A. Waschmaschine mit einem Durchlaufwassererhitzer
FR2818669A1 (fr) * 2000-12-26 2002-06-28 Ciapem Dispositif permettant de realiser une recirculation de fluide destine notamment a un lave-linge
WO2007053041A1 (en) * 2005-11-04 2007-05-10 Fisher & Paykel Appliances Limited Integrated washing machine pump
ITMC20090150A1 (it) * 2009-06-22 2010-12-23 Meccanica Generale Srl Macchina lavatrice o lavasciugatrice con sistema di ricircolo.
EP2267211A1 (de) * 2009-06-22 2010-12-29 Meccanica Generale S.R.L. Waschmaschine oder Wäschetrockner mit Umlauf
CN101929057A (zh) * 2009-06-22 2010-12-29 通用机械有限公司 具有再循环***的洗衣机或洗衣干衣一体机
US20150191861A1 (en) * 2012-07-19 2015-07-09 Indesit Company S.P.A. Washing machine provided with a recirculation circuit
CN106637838A (zh) * 2017-01-13 2017-05-10 无锡小天鹅股份有限公司 用于洗衣机的加热水循环装置和洗衣机
CN106757957A (zh) * 2017-01-13 2017-05-31 无锡小天鹅股份有限公司 洗衣机

Also Published As

Publication number Publication date
IT8920806A0 (it) 1989-06-07
IT1230395B (it) 1991-10-21

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