EP0552843B1 - Washing and drying machine with an improved safety device against water pollution - Google Patents

Washing and drying machine with an improved safety device against water pollution Download PDF

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Publication number
EP0552843B1
EP0552843B1 EP93200131A EP93200131A EP0552843B1 EP 0552843 B1 EP0552843 B1 EP 0552843B1 EP 93200131 A EP93200131 A EP 93200131A EP 93200131 A EP93200131 A EP 93200131A EP 0552843 B1 EP0552843 B1 EP 0552843B1
Authority
EP
European Patent Office
Prior art keywords
washing
water
drying machine
steam
container
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
EP93200131A
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German (de)
French (fr)
Other versions
EP0552843A1 (en
Inventor
Silvano Fumagalli
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.)
Candy SpA
Original Assignee
Candy SpA
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Filing date
Publication date
Priority to ITMI920131 priority Critical
Priority to ITMI920131A priority patent/IT1260443B/en
Application filed by Candy SpA filed Critical Candy SpA
Publication of EP0552843A1 publication Critical patent/EP0552843A1/en
Application granted granted Critical
Publication of EP0552843B1 publication Critical patent/EP0552843B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 

Description

  • The present invention relates to a washing and drying machine with an improved safety device against water pollution.
  • A washing and drying machine is well-known to include the two functions of washing and drying of clothes.
  • Already in normal washing machines the need has asserted itself for some time, and in several Countries it has become mandatory, to provide the water inlet circuit with means for preventing the return of the water, already mixed with detergents, into the mains water supply, for example, after a partial or total blockage of the machine's discharge conduit.
  • For this purpose, in particular, between the inlet of washing water and the highest level set for the detergents inside the corresponding holder, there has to be a so-called "air gap", generally set at 20 mm or more.
  • The case becomes complicated in the case of washing and drying machines, wherein the steam condenser requires a further cold-water inlet, for which the use of the "air gap" system becomes difficult. The level at which the cold jet is inserted into the steam condenser is in actual fact always below the level of overflow used in the detergent loading circuit for the washing cycle, so that it is necessary to add a further overflow outlet positioned so as to prevent the elimination of the "air gap" provided for supplying the steam condenser.
  • The document US-A-2 887 862 discloses a washing and drying machine wherein the rinse agent is prevented from clogging up the openings in the system.
  • The object of the present invention is to accomplish a washing and drying machine endowed with an improved safety system against water pollution.
  • According to the invention such object is attained with a washing and drying machine comprising a washing container, a rotating laundry drum rotatably housed in said container, a detergent holder with washing water flowing through it from a port for the supply of washing water provided with an air gap and endowed with an overflow outlet, a steam condenser communicating with the inside of said container to receive the steam emanated by the washed laundry contained in the drum and with a nozzle for spraying cold water for the condensation of said steam, an aspirator associated with said condenser for the aspiration of the condensed steam formed in said condenser and for its conveyance to a drying area for the formation of dry hot air and a recirculation conduit of dry hot air inside said container, characterized in that said spraying nozzle communicates with a space above the detergent holder that is located below a supply port of condensation water with a predetermined air gap with respect to it and has an overflow level that is higher than that of said overflow outlet.
  • The presence of the abovementioned space inside the detergent holder and above the spraying nozzle of the condensation water (and the corresponding connecting conduit) obviously allows the latter to have a suitable air gap under all operating conditions, discharging any excess water first of all into the holder and in the usual syphon underneath for the supply of water and detergent and then, in case of overflow, outside the machine through the holder's overflow outlet. The same space ensures simultaneously a predetermined water column over the spraying nozzle and thus a suitable water pressure at the nozzle itself.
  • These and other features of the present invention shall be evident from the following detailed description of one of its embodiments illustrated as a non-limiting example in the enclosed drawings, wherein:
    • Fig. 1 shows a diagramatic view of the rear part of a washing and drying machine according to the present invention;
    • Fig. 2 shows a diagramatic view of the abovementioned machine in a partially-sectioned side view;
    • Fig. 3 shows the enlarged detail, in a lateral cross-section, of the detergent holder used in the abovementioned machine;
    • Fig. 4 shows the enlarged detail, in a rear cross-section, of the steam condenser with the corresponding cold-water spraying nozzle.
  • There is indicated in the drawings with 1 a conventional washing container for a washing and drying machine, inside which there is rotatably arranged a rotating laundry drum 2 accessible from the outside through a port 3.
  • The loading of washing water inside the container 1 up to a level A takes place through an inlet syphon 4 (Fig. 1), that receives water mixed with detergent from a detergent distribution holder 5 above, that contains a removable drawer 21 with appropriate detergents 22 for washing, bleaching, softening and so on up to maximum level B (Fig.s 1 and 3), is provided with an overflow outlet 6 that conveys outside the casing 7 of the machine and receives cold washing water from a conveyor 23 located in front of a supply port 8 connected to a flexible hose 9 controlled by a usual inlet solenoid valve (not shown). Between the supply port 8 and the conveyor 23 there is an empty space or "air gap" that extends vertically for a height of at least 20 mm above the maximum level B of the detergent load and has the task of preventing the return of water mixed with detergent, and thus polluted, into the water mains.
  • For the drying part the machine comprises a steam condenser 10 (Figures 1, 2 and 4) constituted by a wide vertical conduit that communicates at its lower end with the inside of the washing container 1 so as to receive the water vapour released by the washed laundry contained in the drum 2 and receives at a height that is selected in an appropriate manner in relation to the level A of the water in the container a cold-water spraying nozzle 11 destined to cause the condensation of the steam in the condenser 10. At the upper end of the condenser 10 there is an aspirator 24, constituted by a fan 12 and by a motor 13, that has the task of aspirating the steam to be condensed from the container 1 and that condensed downstream from the nozzle 11 and to send it through a conveyor 26 to a drying area 14, where an electrical resistance 15 dries the condensed steam and correspondingly forms a flow of dry hot air that is lastly returned to the container 1 through a recirculation conduit 16.
  • For the supply of cold water to the spraying nozzle 11 the latter is connected, through a flexible hose 17, to the bottom of an internal space 18 of the detergent holder 5 (Fig.s 1 and 3), whose top end communicates freely with the holder itself and is located at a height that is greater than that of the holder's overflow outlet 6 and also than the maximum level B of the detergents in the holder. This top end is also at a predetermined vertical distance, defining an "air gap", from a cold-water supply port 19 above, connected to a flexible hose 20 controlled by a usual inlet solenoid valve (not shown).
  • During the execution of a washing cycle, with the aspirator 24 obviously at rest together with the solenoid valve for supplying cold water to the spraying nozzle 11, the function of safety against the return of water into the water mains is executed by the air gap associated with the port supplying washing water 8.
  • Once the washing cycle is over, during the subsequent drying operation, a similar safety function is executed by the air gap between the supply port 19 of the water for condensing steam and the top end of the accumulation space below 18.
  • The water accumulating in the abovementioned space also constitutes a column of water that ensures a constant water pressure at the spraying nozzle.
  • Any excess water in the space 18 overflows from the same and ends up inside the holder 5 and from here into the washing container's inlet syphon 4. Here they prevent any losses of steam and inlets of cold water.
  • In case of an overflow the same outlet 6 of the holder 5 is used to discharge any excess of water outside the casing 7 with no paths of interference with live electrical parts.
  • It should be considered that the safety device operates independently of the presence of electrical energy,
  • Naturally the washing and drying machine must be water-proof up to the overflow outlet level 6. For this purpose, between the steam condenser 10 and the conveyor of condensed steam 26 above there is a gasket 25, shown in Fig. 4.

Claims (4)

  1. Washing and drying machine comprising a washing container (1), a rotating laundry drum (2) rotatably housed in said container (1), a detergent holder (5) with washing water flowing through it from a port (8) for the supply of washing water provided with an air gap and provided with an overflow outlet (6), a steam condenser (10) communicating with the inside of said container (1) to receive the steam emanated by the washed laundry contained in the drum (2) and with a nozzle (11) for spraying cold water for the condensation of said steam, an aspirator (24) associated with said condenser (10) for the aspiration of the condensed steam formed in said condenser (10) and for its conveyance to a drying area (14) for the formation of dry hot air and a recirculation conduit (16) of dry hot air inside said container (1), characterized in that said spraying nozzle (11) communicates with a space (18) above the detergent holder (5) that is located below a supply port (19) of condensation water with a predetermined air gap with respect to it and has an overflow level that is higher than that of said overflow outlet (6).
  2. Washing and drying machine according to claim 1, characterised in that said air gap is of at least 20 mm.
  3. Washing and drying machine according to claim 1, characterised in that said overflow outlet (6) communicates with the outside of the machine's casing (7).
  4. Washing and drying machine according to claim 1, characterised in that said overflow outlet of said space (18) is also higher than the maximum detergent level that can be obtained in said holder (5).
EP93200131A 1992-01-24 1993-01-20 Washing and drying machine with an improved safety device against water pollution Expired - Lifetime EP0552843B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITMI920131 1992-01-24
ITMI920131A IT1260443B (en) 1992-01-24 1992-01-24 SCRUBBER MACHINE WITH PERFECTED SAFETY DEVICE AGAINST WATER POLLUTION

Publications (2)

Publication Number Publication Date
EP0552843A1 EP0552843A1 (en) 1993-07-28
EP0552843B1 true EP0552843B1 (en) 1996-04-03

Family

ID=11361660

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93200131A Expired - Lifetime EP0552843B1 (en) 1992-01-24 1993-01-20 Washing and drying machine with an improved safety device against water pollution

Country Status (3)

Country Link
EP (1) EP0552843B1 (en)
DE (1) DE69302026T2 (en)
IT (1) IT1260443B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7908766B2 (en) 2004-12-06 2011-03-22 Lg Electronics Inc. Clothes dryer
US8826559B2 (en) 2004-12-06 2014-09-09 Lg Electronics Inc. Clothes dryer

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3517618B2 (en) * 1999-10-21 2004-04-12 株式会社東芝 Drum type washer / dryer
KR101041070B1 (en) 2003-06-13 2011-06-13 삼성전자주식회사 Drum Washing Machine
KR100774487B1 (en) * 2006-10-31 2007-11-08 엘지전자 주식회사 Clothes dryer
KR101387497B1 (en) * 2007-08-03 2014-04-21 엘지전자 주식회사 device for treating cloth
EP2957671B1 (en) 2009-06-29 2018-08-29 Electrolux Home Products Corporation N.V. Appliance for drying laundry
EP2270274B1 (en) 2009-06-29 2013-09-25 Electrolux Home Products Corporation N.V. Appliance for drying laundry
EP2471994B1 (en) 2011-01-04 2019-06-26 Electrolux Home Products Corporation N.V. Appliance for drying laundry
EP2471998B1 (en) 2011-01-04 2019-04-10 Electrolux Home Products Corporation N.V. Appliance for drying laundry
CN102767064B (en) * 2011-05-06 2016-06-01 海尔集团公司 Rolling washing dryer gas venting system and rolling washing dryer
EP2843119B1 (en) * 2013-08-30 2017-10-11 Electrolux Appliances Aktiebolag Laundry appliance having overheating preventing system

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2813414A (en) * 1955-05-27 1957-11-19 Westinghouse Electric Corp Apparatus for washing and drying fabrics
US2887862A (en) * 1958-03-24 1959-05-26 Gen Electric Material dispensing system for combination clothes washing and drying machines
IT218183Z2 (en) * 1988-09-19 1992-04-08 Pordenone COMBINED MACHINE FOR THE WASHING AND DRYING OF THE LINEN.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7908766B2 (en) 2004-12-06 2011-03-22 Lg Electronics Inc. Clothes dryer
US8826559B2 (en) 2004-12-06 2014-09-09 Lg Electronics Inc. Clothes dryer
US8863400B2 (en) 2004-12-06 2014-10-21 Lg Electronics Inc. Clothes dryer

Also Published As

Publication number Publication date
IT1260443B (en) 1996-04-09
EP0552843A1 (en) 1993-07-28
ITMI920131D0 (en) 1992-01-24
ITMI920131A1 (en) 1993-07-25
DE69302026T2 (en) 1996-10-24
DE69302026D1 (en) 1996-05-09

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