EP2604738A1 - Machine à laver avec générateur de vapeur intégré - Google Patents
Machine à laver avec générateur de vapeur intégré Download PDFInfo
- Publication number
- EP2604738A1 EP2604738A1 EP11192933.7A EP11192933A EP2604738A1 EP 2604738 A1 EP2604738 A1 EP 2604738A1 EP 11192933 A EP11192933 A EP 11192933A EP 2604738 A1 EP2604738 A1 EP 2604738A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tub
- heater
- washing machine
- water
- steam
- 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
Links
- 238000005406 washing Methods 0.000 title claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 87
- 239000003599 detergent Substances 0.000 claims description 10
- 238000005192 partition Methods 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 10
- 238000001035 drying Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000001954 sterilising effect Effects 0.000 description 4
- 238000010412 laundry washing Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
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
- D06F39/40—Steam generating 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
- D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
- D06F2105/38—Conditioning or finishing, e.g. control of perfume injection
- D06F2105/40—Conditioning or finishing, e.g. control of perfume injection using water or steam
-
- 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
- D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
- D06F33/52—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry
- D06F33/65—Control of the operational steps, e.g. optimisation or improvement of operational steps depending on the condition of the laundry of conditioning or finishing phases, e.g. for smoothing or removing creases
Definitions
- the present invention relates to a water bearing appliance intended for washing and/or drying clothes, having an article treating chamber, where the clothes to be washed/dried are introduced, including a steam cycle.
- said household appliance may be a washing machine, or a washer-dryer, that is a laundry washing machine with additional drying function.
- a water bearing appliance e.g. a washing or a washing/drying machine
- a water bearing appliance includes an article treating chamber rotatably supported within a cabinet and made to rotate by means of a driving device, typically including an electric motor connected to the article treating chamber e.g. via a belt.
- FIG. 1 showing a functional schematic view of a state of the art washing machine
- such machine includes a rotating drum 3, for carrying out a washing, rotatably supported within a tub 2 situated within a cabinet or outer body (not shown in the Figure).
- Water necessary to carry out the washing is derived from a main via a common supply pipe 4 and introduced into the tub 2 via washing water supply pipe 5, by opening of a first solenoid valve EV1.
- Water is loaded by the washing water supply pipe 5 into one compartment of the detergent drawer 6.
- the water then flows from the drawer into the tub reaching the sump 7, where it is heated by a heater H.
- Laundry is introduced into the drum through, for example, an aperture in the front wall of the body.
- Some machines are also equipped with a recirculation system, including a recirculation pump RP and a recirculation pipe 8.
- a recirculation pump RP During washing, water is taken from the sump and put again into the tub and the drum thus improving washing performance.
- a pressure sensor P (either analogic or digital) takes care to maintain the water level L.
- a drain pump DP pushes the water out via a discharge pipe 9.
- the most recent washing machines provides also a steam cycle, during which some steam is generated and supplied into to the tub, thus reaching the laundry inside the drum so as to heat up the laundry and the water present inside the tub.
- This system has also the advantage of carrying out a sterilization of the laundry.
- a washing machine is known adapted to generate and apply steam in order to enhance washing performance while enabling sterilization of laundry.
- the washing machine includes a heater installed in the tub and a controller.
- the controller operates the heater to heat the water contained in the tub to generate steam, rather than just warming the water.
- the washing machine further comprises a water level sensor to detect a water level in the tub, and the controller operates the heater according to a detection result of the water level sensor.
- the washing machine has an additional advantageous effect in that, due to the steam, the laundry is also sterilized.
- Patent application WO-A-2006/129913 discloses a method of controlling washing operation of a washing machine, which method comprises the steps of supplying water into a tub, soaking the laundry with water, and supplying steam by heating the water using a heater installed in the tub to generate the steam.
- Patent application JP-A-04158896 discloses a fully automatic washing machine, in which a steam generating cycle is performed before a washing cycle to obtain good washing and sterilizing effect. A small quantity of supply water is introduced and heated in the tub before the washing cycle, in a manner not to wet the laundry and to produce steam that sterilizes the laundry and loosens the fibers thereof.
- Some washing machines beside the washing cycle also include a drying cycle, in which a drying process is carried out on the laundry using steam and/or an air circulation system, possibly including a condenser device to remove the water.
- the drying air circulates in an air recirculation pipe connected to the tub.
- a key parameter to save energy and water is to reduce the amount of water actually used to wash the laundry. Heating of the wetted load accounts for the major part of the energy consumption of a washing machine.
- a further object of the present invention is to provide a water bearing appliance (e.g. a washing machine, or a washer-dryer, i.e. a laundry washing machine with additional drying function) which allows easy assembly and energy saving.
- a water bearing appliance e.g. a washing machine, or a washer-dryer, i.e. a laundry washing machine with additional drying function
- An object of the present invention is to propose a washing or dryer machine with a more compact configuration, including a steam generating system which can be easily applied, with minimal changes, to standard washing machines and dryers as well as to washing-dryer machines with concentrated wash and steam function.
- Another object of the invention is to propose a washing or dryer machine in which steam temperature losses are reduced, with a substantial energy saving, and in which the steam flow inside the drum is optimized.
- the present disclosure provides a water bearing appliance as set out in the accompanying claims.
- the present disclosure provides a washing machine including: a tub provided within an outer body, a drum, rotatably supported inside the tub, at least one heater aimed at generating steam to be provided to the tub, wherein the heater is integrated into the back of the tub, between a rear portion of the drum and an outer rear wall of the tub.
- the back portion of the tub comprises a seat for housing the heater.
- the seat is provided at an inner rear wall of the tub or at an outer rear wall of the tub or in the thickness of the back of the tub between the inner rear wall and the outer rear wall of the tub.
- a cover is provided to be coupled to the outer wall of the tub so as to close the seat of the heater from outside the tub.
- the heater is fixed to the cover.
- the seat of the heater forms a water collecting chamber aimed at collecting a small amount of water to produce steam.
- a partition wall is situated beside the rear wall of the drum, a steam duct being obtained between the partition wall and the rear wall, the heater being placed within the steam duct and the generated steam being conveyed along the steam duct inside the tub.
- water is sprayed onto the heater to generate steam.
- the heater when mounted, closes in a water tight manner an opening in the outer rear wall of the tub.
- the water collecting chamber is integrated within the steam duct.
- the heater is positioned in the lower part of the tub, so that it can be partially covered by water.
- the water within the tub is maintained at a level not to wet the laundry, during formation of steam.
- a thermostat is provided aimed at interrupting the power supply to the heater when the temperature reaches a certain level due to the water level being too low to cover or partially cover the heater.
- a temperature sensor is provided for fine regulation of the heater.
- water is supplied to the heater for steam generation via a separate independent path by-passing a detergent dispenser.
- the heater can be placed within a water collecting chamber integrated within the steam duct and aimed at collecting a small amount of water to produce steam.
- the heater is positioned in a lower part of the tub, so that it can be covered or partially covered by water, and in a region corresponding or connected to said steam duct.
- the machine according to the invention further comprises a temperature sensor used for fine regulation of the steam temperature, this temperature sensor being also possibly used as an indirect measurement of the water level within the lower part of the tub.
- the heater for generating steam could be the only heater inside the tub and it also heats the water within the lower part of the tub, used to wash the laundry.
- the present invention offers a number of benefits.
- One of the advantages of the invention derives from the integration of the heater sub-assembly (optionally including the steam duct) in the rear cover of the tub. Cover is modular, thus requiring minimal changes if standard washing machine are produced with concentrated wash and steam functions.
- Another advantage is a reduction in the loss of steam temperature, due to the use of pipes or air ducts made in the tub. This optimizes the steam flow inside the drum.
- a further advantage is a shorter assemblage time required to produce the machine, as the steam duct is mounted together with the tub rear wall or cover.
- a further advantage is the reduced quantity of water to be heated to produce steam; in particular according to the first embodiment, a small amount of water is sprayed onto the heater. Steam is produced quickly and with low energy consumption.
- Another advantage of the second embodiment is the possible use of one heater only, used both to heat water for washing the laundry and to produce the steam.
- a heater 10 is integrated into the back of the tub 2 between a rear portion 14 of drum 3 (particularly a rear wall of the drum) and an outer rear wall 12 of the tub 2, i.e. the wall of the tub facing a rear wall of the cabinet where the tub is accommodated.
- the heater 10 is adapted to generate steam which is provided to the drum 14.
- the back portion of the tub comprises a seat for housing the heater 10.
- the seat can provided at an inner rear wall of the tub or at an outer rear wall of the tub or in the thickness of the back of the tub 2 between the inner rear wall and the outer rear wall 12 of the tub.
- the seat can be provided in a single piece-construction with the back of the tub 2, for example by injection molding.
- the seat can be provided so as to directly face the interior of the tub and hence the rear portion of the drum or the seat can be provided in the thickness of the back of the tub 2 and in this case the seat is fluidly connected with the interior of the tub 2.
- the seat can simply provides a support for the heater 10, for example when the heater 10 is coupled to the inner rear wall of the tub.
- a cover is provided to be coupled to the outer wall 12 of the tub so as to close the seat of the heater 12 from outside the tub 3.
- the heater is fixed to the cover.
- an opening is provided in the outer rear wall 12 of the tub.
- the opening can be closed by a watertight shutter (or wicket, or door) which allows easy access to the internal part of the tub and to the heater.
- the heater is placed next to the opening.
- a particular solution is represented according to which the heater 10 itself acts as shutter and, when mounted, closes in a watertight manner the opening.
- the heater is fixed to the tub by means of washers (e.g. rubber washers) 30 to ensure the connection is watertight so that leakage is avoided.
- the heater is placed between the outer rear wall 12 of the tub and a partition wall 13 situated beside the rear wall 14 of the drum 3.
- a partition wall 13 situated beside the rear wall 14 of the drum 3.
- Such space between the rear wall and the partition wall constitutes a duct through which the steam generated by the heater is more efficiently conveyed to the drum.
- the steam duct is just a possible implementation of the present invention: the heater can well be in direct contact (i.e. not separated by a partition wall) with the drum.
- the washing machine generally comprises a body (not shown in the Figures), which defines the appearance of the washing machine, an outer tub 2 provided within the body, and a drum 3, rotatably supported inside the tub 2.
- the drum 3 is rotated by a motor 16 e.g. by means of a belt 17.
- Water coming from a main flows along a common supply pipe 4 and is introduced into the tub 2 via washing water supply pipe 5, e.g. by opening of a first solenoid valve EV1. Water is loaded into one compartment of the detergent drawer 6. The water then flows from the drawer into the tub reaching the sump 7.
- a steam duct 11 is provided for allowing steam generated by a heater 10 to be introduced into the tub 2 to perform a steam cycle.
- Laundry is introduced into the drum 3 through an aperture (not shown) in the front wall of the body.
- the heater 10 is positioned inside the steam duct 11, between the outer rear wall 12 and the partition wall 13. Water is, preferably, sprayed onto the heater 10, to generate steam, the water being conducted into the steam duct 11 through an additional pipe 18, branching from the common supply pipe 4, and by utilizing an additional solenoid valve EV4.
- drain pump DP provides to drain it out.
- the drain pump may be functioning during all the steam cycle (as it happens in the washer-dryers during the drying phase) or a pressure sensor P can be used to monitor the water level in the sump 7 and trigger the action of the pump.
- the heater 10 is situated within a water collecting chamber 15 preferably integrated within the steam duct 11 and aimed at collecting a small amount of water necessary to produce steam. Water in excess overflows from the chamber 15 and falls down into the sump.
- the steam duct 11 can be omitted and the seat of the heater forms the water collecting chamber 15
- the heater 10 is integrated to the back of the tub 2 between a rear portion 14 of drum 3 and an outer rear wall 12 of the tub 2, but is positioned at a lower part of the tub 2, so that it can be partially covered by water.
- the heater is position in an area not lower than the lower margin of the drum.
- the partition wall 13, shown in Figures 5A and 5B can be omitted.
- Water is loaded into the tub 2 by opening the solenoid valve EV1 and flowing to the sump 7 by gravity through the standard path.
- the pressure sensor P keeps the level at a lower level L 0 below the drum limit, to avoid wetting the laundry, but high enough to partially cover the heater 10, which produces the steam.
- the generated steam is driven by natural convection through the steam duct 11, thus reaching the drum 3 and the laundry.
- a solenoid valve e.g. EV1
- EV1 a solenoid valve
- the heater 10 can feature a thermostat which interrupts the power supply when the temperature reaches a certain level due to the water level being too low to partially cover the heater 10.
- a temperature sensor T may be used for fine regulation of the steam temperature, this temperature sensor being also possibly used as an indirect measurement of the water level L 0 .
- a further improvement can be incorporated in the invention, about the water loading system. If the water to be transformed into steam is loaded, as in the traditional way, through the detergent drawer, it may happen that detergent residuals come into contact with the heater, thus generating bad smell and possibly causing malfunction of the system.
- An advantage of the second embodiment here described is the fact that the heater 10 for generating steam is the only heater 10 inside the tub 2 and it also heats the water used to wash the laundry.
- a further advantage is the reduced water consumption and the reduced amount of free wash liquid during the main wash. Due to the reduced quantity of water, a consistent energy saving is possible, because less energy is required to heat up the content of the drum.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL11192933T PL2604738T3 (pl) | 2011-12-12 | 2011-12-12 | Pralka ze zintegrowanym generatorem pary wodnej |
EP11192933.7A EP2604738B1 (fr) | 2011-12-12 | 2011-12-12 | Machine à laver avec générateur de vapeur intégré |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11192933.7A EP2604738B1 (fr) | 2011-12-12 | 2011-12-12 | Machine à laver avec générateur de vapeur intégré |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2604738A1 true EP2604738A1 (fr) | 2013-06-19 |
EP2604738B1 EP2604738B1 (fr) | 2016-10-19 |
Family
ID=45218469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11192933.7A Active EP2604738B1 (fr) | 2011-12-12 | 2011-12-12 | Machine à laver avec générateur de vapeur intégré |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2604738B1 (fr) |
PL (1) | PL2604738T3 (fr) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104746313A (zh) * | 2015-03-31 | 2015-07-01 | 无锡小天鹅股份有限公司 | 洗衣机和洗衣机的加热装置 |
EP2933367A1 (fr) | 2014-04-01 | 2015-10-21 | Indesit Company S.p.A. | Appareil de lavage domestique comportant des moyens de génération de vapeur pour usage externe |
WO2016062349A1 (fr) * | 2014-10-24 | 2016-04-28 | Electrolux Appliances Aktiebolag | Appareil à laver le linge ayant une alimentation en vapeur |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113201899B (zh) * | 2021-04-13 | 2022-08-26 | 合肥美的洗衣机有限公司 | 衣物处理设备 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04158896A (ja) | 1990-10-22 | 1992-06-01 | Sanyo Electric Co Ltd | 全自動洗濯機 |
EP1507033A1 (fr) * | 2003-08-13 | 2005-02-16 | LG Electronics Inc. | Machine à laver avec générateur de vapeur |
US20060005581A1 (en) * | 2004-05-12 | 2006-01-12 | Yoshikazu Banba | Laundry machine |
CH695383A5 (de) | 2001-07-10 | 2006-04-28 | V Zug Ag | Wäschetrockner oder Waschautomat mit Bedampfungsvorrichtung. |
WO2006129913A1 (fr) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Procede de commande d'un lave-linge |
WO2006129912A1 (fr) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Machine a laver generant et utilisant de la vapeur |
-
2011
- 2011-12-12 PL PL11192933T patent/PL2604738T3/pl unknown
- 2011-12-12 EP EP11192933.7A patent/EP2604738B1/fr active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04158896A (ja) | 1990-10-22 | 1992-06-01 | Sanyo Electric Co Ltd | 全自動洗濯機 |
CH695383A5 (de) | 2001-07-10 | 2006-04-28 | V Zug Ag | Wäschetrockner oder Waschautomat mit Bedampfungsvorrichtung. |
EP1507033A1 (fr) * | 2003-08-13 | 2005-02-16 | LG Electronics Inc. | Machine à laver avec générateur de vapeur |
US20060005581A1 (en) * | 2004-05-12 | 2006-01-12 | Yoshikazu Banba | Laundry machine |
WO2006129913A1 (fr) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Procede de commande d'un lave-linge |
WO2006129912A1 (fr) | 2005-05-31 | 2006-12-07 | Lg Electronics Inc. | Machine a laver generant et utilisant de la vapeur |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2933367A1 (fr) | 2014-04-01 | 2015-10-21 | Indesit Company S.p.A. | Appareil de lavage domestique comportant des moyens de génération de vapeur pour usage externe |
WO2016062349A1 (fr) * | 2014-10-24 | 2016-04-28 | Electrolux Appliances Aktiebolag | Appareil à laver le linge ayant une alimentation en vapeur |
CN107075776A (zh) * | 2014-10-24 | 2017-08-18 | 伊莱克斯家用电器股份公司 | 具有蒸气供应的衣物洗涤设备 |
CN107075776B (zh) * | 2014-10-24 | 2019-07-30 | 伊莱克斯家用电器股份公司 | 具有蒸气供应的衣物洗涤设备 |
CN104746313A (zh) * | 2015-03-31 | 2015-07-01 | 无锡小天鹅股份有限公司 | 洗衣机和洗衣机的加热装置 |
Also Published As
Publication number | Publication date |
---|---|
PL2604738T3 (pl) | 2017-08-31 |
EP2604738B1 (fr) | 2016-10-19 |
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