EP2921585B1 - A top-loading laundry washing machine and a laundry drum for such machine - Google Patents
A top-loading laundry washing machine and a laundry drum for such machine Download PDFInfo
- Publication number
- EP2921585B1 EP2921585B1 EP15156247.7A EP15156247A EP2921585B1 EP 2921585 B1 EP2921585 B1 EP 2921585B1 EP 15156247 A EP15156247 A EP 15156247A EP 2921585 B1 EP2921585 B1 EP 2921585B1
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- EP
- European Patent Office
- Prior art keywords
- drum
- detergent
- washing machine
- laundry
- laundry washing
- 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.)
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- 238000010412 laundry washing Methods 0.000 title claims description 53
- 239000003599 detergent Substances 0.000 claims description 73
- 238000005406 washing Methods 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002775 capsule Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 239000000654 additive Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- -1 electric power Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000002195 synergetic effect Effects 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
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
- D06F37/04—Rotary receptacles, e.g. drums adapted for rotation or oscillation about a horizontal or inclined axis
-
- 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
- D06F23/00—Washing 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
- D06F23/06—Washing 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 rotating or oscillating about an inclined axis
Definitions
- the present invention relates to a system for loading detergent into a laundry drum in top-loading laundry washing machines or washer-dryer machines.
- a system for loading detergent into a laundry drum in top-loading laundry washing machines or washer-dryer machines.
- the detergent loading system is equally intended for use in washer-dryer machines and, under predetermined conditions, in front-loading laundry washing machines.
- DE4342626A describes a laundry machine with a laundry drum according to the preamble of claim 1.
- the top-loading laundry washing machines typically comprise a support and holding structure, which is provided with a lid that gives access to a loading opening of a laundry drum.
- the drum is rotatably supported within a washing tub located in the support and holding structure.
- the drum is provided with one or more doors provided with special locking hooks to cover the loading opening during the washing or drying cycle.
- the washing tub is suitable to contain the washing liquid during the laundry washing steps.
- a system for loading the washing water is provided for, which is connectable to the water supply system.
- a drain conduit is provided for on the washing tub bottom, with an associated drain pump that provides for the removal of the washing liquid from the tub and that controls, together with the loading system, the liquid level inside the tub.
- an electric resistor is provided for, which is arranged inside the tub in the interspace between the tub wall and the laundry drum.
- the laundry washing and washer-dryer machines of the prior art while being satisfactory from several aspects, have a high consumption of water, electric power, and detergent.
- An underlying problem of the laundry washing machines having a top loading is that, particularly during the first washing steps, the detergent, instead of acting immediately and intensely with the laundry, is poured from the detergent basin on the circumferential wall of the laundry drum, from which it slides along the outer surface of the drum into the washing tub, where it builds-up before being mixed and poured again onto the drum.
- the detergent concentration in the laundry is undesirably low.
- a particular object of the invention is to allow the detergent and the water-detergent mixture poured onto the outer surface of the drum to enter it directly, without sliding away externally in the tub.
- a further object of the invention is to provide a laundry washing machine with an improved detergent or water-detergent mixture supply system and, consequently, with improved washing performances.
- a top-loading laundry washing machine is generally indicated by the reference 1.
- the laundry washing machine 1 comprises a support and holding structure 2 provided with an upper access opening 3 that can be closed by a lid 4, which is preferably hinged to the support and holding structure 2.
- the access opening 3 gives access to a loading aperture 5 of a perforated drum 6 which is rotatably supported about a rotational axis, which is typically, but not necessarily, horizontal, within a washing tub 7 located in the support and housing structure 2.
- a circumferential wall 12 of the perforated drum 6 forms the above-mentioned loading aperture 5 and comprises one or more doors 8, 8', which are movable between a closure position, in which the doors 8 cover the loading aperture 5, and an opening position, in which they clear the loading aperture 5.
- the one or more doors 8, 8' are hinged to the drum 6 and open outwardly.
- the door(s) 8, 8' are slidably secured to the drum 6 and open in a direction that is substantially tangential or circumferential to the rotational axis of the drum 6.
- the washing tub 7 is suitable to contain the washing liquid during the laundry washing steps.
- a water loading system 9 is provided for, which is connectable to the water supply system.
- a drain conduit is provided for on the washing tub bottom 7, with an associated drain pump that provides for the removal of the washing liquid from the tub 7 and that controls, together with the loading system 9, the liquid level inside the tub 7.
- an electric resistor (not shown) is provided for, which is arranged inside the tub 7 in the interspace between the tub 7 wall and the drum 6.
- the laundry washing machine 1 further comprises a detergent basin 10 in connection with the water loading system 9 and having one or more outlet openings 11, 11', which are arranged, during the operation of the laundry washing machine 1 and when the lid 4 closed, directly on top of the circumferential wall 12 of the drum 6.
- the detergent basin 10 may comprise different compartments to receive different detergent substances, additives, softeners, etc., for example, a liquid detergent compartment 13, a powdery detergent compartment 14, a pre-wash detergent compartment 15, a softener compartment 16.
- the individual compartments 13, 14, 15, 16 can have discrete filling openings 18 and windows 19 with a mark 17 of the filling level, e.g., a maximum filling level.
- the circumferential wall 12 of the drum 6 forms a funnel 21 for receiving the detergent or the water-detergent mixture.
- the funnel 21 comprises a cavity 23 (formed in an outer surface 22 of the circumferential wall 12) that is open and facing outwardly of the drum 6, as well as a plurality of through holes 24 extending from the cavity 23 into the drum 6.
- the funnel 21 comprises a cavity 23 (formed in an outer surface 22 of the outer, e.g., circumferential, 12 and/or side 42 wall) open and facing radially outwardly the drum 6, as well as a plurality of through holes 24 extending from the cavity 23 into the drum 6.
- the funnel 21 could be formed in one or more portions 43 bulging outwardly of the side wall 42.
- the laundry washing machine 1 is configured so as to position, during one or more detergent introduction steps, the drum 6 with the funnel 21 with respect to the at least one outlet opening 11, 11' in a detergent transfer position in which a flow 30 of detergent or water-detergent mixture exiting the outlet openings 11, 11' is received in the funnel 21.
- a control system 25, e.g., an electronic board, in connection with a motor 26 that rotates the drum 6 and with one or more electrovalves 27 of the water loading system 9, is configured so as to position, during one or more detergent introduction steps, the funnel 21 under the outlet opening 11, 11' and substantially vertically aligned therewith. In this manner, the flow 30 of detergent or water-detergent mixture coming from the outlet opening 11, 11' may fall by gravity directly into the cavity 23 of the funnel 21.
- control system 25 is configured to maintain the detergent transfer position for a time interval from 5 seconds to 240 seconds, preferably 5 seconds to 60 seconds.
- control system 25 and the water loading system 9 are configured so as to generate the above-mentioned flow 30 of detergent or water-detergent mixture in the form of a forced or pressurized jet, so as to accelerate the passage of the detergent through the funnel 21 into the drum 6.
- the outlet opening(s) 11, 11' is/are formed from tubular portions 29 extending or projecting downwardly (during the operation of the laundry washing machine 1 and/or when the lid 4 is closed) from a bottom wall 28 of the detergent basin 10, so as to allow the formation of a liquid column that increases the conveying pressure of the detergent or water-detergent mixture flow 30.
- tubular portion(s) 29 can be tapered toward the lower end (forming the outlet opening 11, 11') in order to obtain a detergent flow 30 that is as compact and targeted as possible.
- the detergent basin 10 can form at least one inverted syphon 32 with an auxiliary discharge opening 31 and configured to activate and empty the detergent basin or one or more individual detergent compartments when a threshold filling level 33 is reached ( Fig.3 ). This ensures an emergency operation of the laundry washing machine 1 even in the case of an obstruction of the outlet opening 11, 11' of the detergent basin 10.
- the inverted syphon 32 can be formed by an ascending tube 34 projecting from the basin bottom upwardly, and a descending tube 35, which is inserted from above onto the ascending tube 34 and having a closed upper end.
- At least one of said funnels 21 is shaped, preferably by injection moulding, in a plastic portion 36 of the circumferential wall 12. This facilitates the implementation of the (relatively high) depth and optimal shape of the cavity 23 and the optimal shape and length of the through holes 24, which could be more hardly obtained from stainless steel by a press.
- the plastic portion 36 is formed in at least one of the doors 8, 8'. These can be formed, for example, by a metal load-bearing frame and the plastic portion 36, which is for example, over-moulded on the metal frame. This involves a synergistic advantage in terms of handling comfort of the door by a user (for example, a women having delicate hands), manufacturing ease of the door 8, 8' and implementation of the funnel 21.
- the through holes 24 can be formed in tubular portions projecting from an inner surface of the circumferential wall 12 towards the inside of the drum. By virtue of the length/diameter ratio, larger than 1 of the through holes 24, they create (after an initial filling thereof) a suction, which further promotes the transfer of the detergent from the outer cavity 23 into the drum 6.
- the funnel(s) 21 can be also formed in a metal portion of the circumferential wall 12.
- the funnel(s) 21 can be formed in the door 8, 8' and/or in a zone of the circumferential wall 12 far from the door, for example, diametrically opposite it, and/or at a laundry dragging blade 20 of the drum 6.
- the dragging blade could be formed, for example, by the circumferential wall 12 or connected from inside to the circumferential wall 12, and the cavity 23 of the funnel 21 could be formed inside the overall dimensions of the dragging blade or by the dragging blade itself.
- the through holes 24 of the funnel 21 have a width or diameter that is larger than the diameter of small holes 37 formed in the circumferential wall 12 outside the funnel 21. This allows a better transfer of the water-detergent mixture in the localised zone of the funnel 21 (possibly, made of plastic) and obviates damages to the laundry due to too large holes 37 in the remaining zones of the circumferential wall 12 that is made of steel sheet.
- the through holes 24 of the funnel 21 have a width or diameter ranging from 3mm to 12 mm, preferably 5mm to 8mm, still more preferably about 6mm.
- the cavity 23 of the funnel 21 preferably has a width 38 transversal to the direction of the through holes 24 ranging between 6 ... 15 times, preferably from 8 12 times, the width of the individual through holes 24.
- the width 38 of the cavity can be about 4cm ... 12 cm, preferably 4cm ... 8cm, still more preferably about 5cm 8cm.
- the depth (radial with respect to the drum rotational axis) of the cavity 23 can range from 0.5 cm to 10 cm, preferably from 1cm to 6cm, still more preferably from 1 cm to 4 cm.
- the shape (in a top view) of the cavity 23 can be, for example, circular, oval, or polygonal.
- the funnel 21, particularly the cavity 23, can be suitable to at least temporarily receive and hold a tablet 41 or capsule containing a substance for treating laundry, for example, a pre-washing tablet or capsule.
- the cavity 23 can have a fixed, small restraint edge 40 for a snap-, interference-, or shape-fitting with the tablet 41.
- the small restraint edge 40 can be movable between an open position, in which it allows the insertion of the tablet 41 into the cavity 23, and a closed position, in which the small restraint edge 40 holds the tablet 41 in the cavity 23.
- the actuation (dissolution, dispensing, release) of the treating substance of the tablet 41 or capsule occurs by the water and/or detergent flow 30 directed into the funnel and acting on the tablet 41 or capsule.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Detail Structures Of Washing Machines And Dryers (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
- The present invention relates to a system for loading detergent into a laundry drum in top-loading laundry washing machines or washer-dryer machines. For the sake of simplicity, reference will be made herein below only to laundry washing machines, but it is understood that the detergent loading system is equally intended for use in washer-dryer machines and, under predetermined conditions, in front-loading laundry washing machines.
DE4342626A describes a laundry machine with a laundry drum according to the preamble ofclaim 1. - The top-loading laundry washing machines typically comprise a support and holding structure, which is provided with a lid that gives access to a loading opening of a laundry drum. The drum is rotatably supported within a washing tub located in the support and holding structure.
- The drum is provided with one or more doors provided with special locking hooks to cover the loading opening during the washing or drying cycle.
- The washing tub is suitable to contain the washing liquid during the laundry washing steps.
- In order to allow the loading of the tub with mains water and detergent substances and additives, a system for loading the washing water is provided for, which is connectable to the water supply system. A drain conduit is provided for on the washing tub bottom, with an associated drain pump that provides for the removal of the washing liquid from the tub and that controls, together with the loading system, the liquid level inside the tub. In order to heat the washing liquid contained in the tub, an electric resistor is provided for, which is arranged inside the tub in the interspace between the tub wall and the laundry drum.
- The laundry washing and washer-dryer machines of the prior art, while being satisfactory from several aspects, have a high consumption of water, electric power, and detergent.
- In order to decrease the consumption of water and detergent, it is known to provide the laundry washing machines with recirculation systems that remove the washing liquid from the tub bottom -where it builds up still before wetting the laundry inside the drum- and pour it from above on the circumferential wall of the laundry drum, or put it back into the laundry drum, particularly through an anchoring hub arranged in a central area of the drum near the rotational axis thereof. Such recirculation systems typically use an electric recirculation pump that, however, consumes electric power, in addition to increase the manufacturing cost and the overall dimensions of the laundry washing machine.
- An underlying problem of the laundry washing machines having a top loading is that, particularly during the first washing steps, the detergent, instead of acting immediately and intensely with the laundry, is poured from the detergent basin on the circumferential wall of the laundry drum, from which it slides along the outer surface of the drum into the washing tub, where it builds-up before being mixed and poured again onto the drum.
- In spite of the presence of holes in the drum circumferential wall, only a minimum part of the detergent poured thereupon passes through these small holes and enters directly into the drum where the laundry is located. Most of the detergent or of the water-detergent mixture discharged from the detergent basin on the drum slides away from the circumferential wall and falls into the tub. Only after it has been mixed and diluted with the water contained in the tub, the detergent is gradually transferred inside the drum.
- Consequently, in the first washing steps, the detergent concentration in the laundry is undesirably low.
- Therefore, it is the object of the present invention to provide a top-loading laundry washing machine and a laundry drum for top-loading laundry washing machine having such characteristics as to obviate at least some of the drawbacks mentioned with reference to the prior art.
- A particular object of the invention is to allow the detergent and the water-detergent mixture poured onto the outer surface of the drum to enter it directly, without sliding away externally in the tub.
- Further specific objects of the invention are the increase of the washing efficiency, the reduction of detergent and water consumptions, the reduction of the energy used on the whole for an automatic washing of the laundry, and the simplification of the washing system itself.
- A further object of the invention is to provide a laundry washing machine with an improved detergent or water-detergent mixture supply system and, consequently, with improved washing performances.
- These and other objects are achieved by a laundry washing machine according to
claim 1 and by a laundry drum for a laundry washing machine according toclaim 10. - The dependent claims relate to advantageous embodiments.
- In order to better understand the invention, and appreciate the advantages thereof, the exemplary, non-limiting description is set forth herein below of some embodiments thereof illustrated in the appended drawings, in which:
-
Fig. 1 is a perspective view of a top-loading laundry washing machine according to the invention, in which an outer upper lid of the laundry washing machine and a door of the laundry drum are completely open; -
Fig. 2 is a perspective view of the laundry washing machine inFig. 1 , in which the outer upper lid of the laundry washing machine is half-open and the door of the laundry drum is closed; -
Fig. 3 shows a laundry washing machine according to the invention in a partial, vertical sectional view, in which the laundry drum is oriented with the door upwardly and aligned with the upper opening of the housing; -
Fig. 4 shows a laundry washing machine according to the invention in a partial, vertical sectional view, in which the laundry drum is oriented with the door downwardly or, alternatively, with a circumferential wall portion spaced apart from the door and facing upwardly; -
Fig. 5 is a perspective view of a top-loading laundry washing machine according to the invention, in which the outer upper lid of the laundry washing machine is open and the laundry drum is rotated with the door away from the upper opening of the housing; -
Fig. 6 shows a laundry washing machine according to the invention in a partial, vertical sectional view, in which the laundry drum is oriented with the door upwardly and aligned with the upper opening of the housing; -
Fig. 7 shows a laundry washing machine according to the invention in a partial, vertical sectional view, in which the laundry drum is oriented with the door downwardly or, alternatively, with a circumferential wall portion spaced apart from the door facing upwardly; -
Fig. 8 is a sectional view of a detail of a laundry drum of the laundry washing machine according to an embodiment; -
Fig. 9 is a laundry drum of the laundry washing machine according to a further embodiment. - With reference to the figures, a top-loading laundry washing machine is generally indicated by the
reference 1. Thelaundry washing machine 1 comprises a support and holdingstructure 2 provided with an upper access opening 3 that can be closed by alid 4, which is preferably hinged to the support and holdingstructure 2. - The
access opening 3 gives access to aloading aperture 5 of aperforated drum 6 which is rotatably supported about a rotational axis, which is typically, but not necessarily, horizontal, within awashing tub 7 located in the support andhousing structure 2. - A
circumferential wall 12 of theperforated drum 6 forms the above-mentionedloading aperture 5 and comprises one ormore doors 8, 8', which are movable between a closure position, in which thedoors 8 cover theloading aperture 5, and an opening position, in which they clear theloading aperture 5. - Advantageously, the one or
more doors 8, 8' are hinged to thedrum 6 and open outwardly. Alternatively, the door(s) 8, 8' are slidably secured to thedrum 6 and open in a direction that is substantially tangential or circumferential to the rotational axis of thedrum 6. - The
washing tub 7 is suitable to contain the washing liquid during the laundry washing steps. - In order to allow the loading of the
tub 7 with mains water, awater loading system 9 is provided for, which is connectable to the water supply system. A drain conduit is provided for on thewashing tub bottom 7, with an associated drain pump that provides for the removal of the washing liquid from thetub 7 and that controls, together with theloading system 9, the liquid level inside thetub 7. In order to heat the washing liquid contained in thetub 7, an electric resistor (not shown) is provided for, which is arranged inside thetub 7 in the interspace between thetub 7 wall and thedrum 6. - The
laundry washing machine 1 further comprises adetergent basin 10 in connection with thewater loading system 9 and having one ormore outlet openings 11, 11', which are arranged, during the operation of thelaundry washing machine 1 and when thelid 4 closed, directly on top of thecircumferential wall 12 of thedrum 6. - In this manner, when the
water loading system 9 supplies mains water or water recirculated from thewashing tub 7 in thedetergent basin 10, such water is mixed inside thedetergent basin 10 with the detergent or additive and the water-detergent and/or water-additive mixture flows from thedetergent basin 10, through the outlet opening(s) 11, 11' directly onto thecircumferential wall 12 of thedrum 6, i.e., on thedoor 8, 8' or portions ofcircumferential wall 12 far from thedoor 8, 8'. - As it is known, the
detergent basin 10 may comprise different compartments to receive different detergent substances, additives, softeners, etc., for example, aliquid detergent compartment 13, apowdery detergent compartment 14, apre-wash detergent compartment 15, asoftener compartment 16. Theindividual compartments discrete filling openings 18 andwindows 19 with amark 17 of the filling level, e.g., a maximum filling level. - According to an aspect of the invention, the
circumferential wall 12 of thedrum 6 forms afunnel 21 for receiving the detergent or the water-detergent mixture. Thefunnel 21 comprises a cavity 23 (formed in anouter surface 22 of the circumferential wall 12) that is open and facing outwardly of thedrum 6, as well as a plurality of throughholes 24 extending from thecavity 23 into thedrum 6. - According to a further aspect of the invention, any outer wall of the
drum 6, for example, one of the two side walls 42 (Fig. 9 ), forms afunnel 21 for receiving the detergent or the water-detergent mixture. Thefunnel 21 comprises a cavity 23 (formed in anouter surface 22 of the outer, e.g., circumferential, 12 and/orside 42 wall) open and facing radially outwardly thedrum 6, as well as a plurality of throughholes 24 extending from thecavity 23 into thedrum 6. - By way of example, the
funnel 21 could be formed in one ormore portions 43 bulging outwardly of theside wall 42. - Furthermore, the
laundry washing machine 1 is configured so as to position, during one or more detergent introduction steps, thedrum 6 with thefunnel 21 with respect to the at least oneoutlet opening 11, 11' in a detergent transfer position in which aflow 30 of detergent or water-detergent mixture exiting theoutlet openings 11, 11' is received in thefunnel 21. - In this manner the
detergent flow 30 is prevented from sliding along the outer surface of thedrum 6 into thetub 7. On the contrary, the detergent is trapped and built up in thecavity 23 through where it passes, via the throughholes 24 directly inside thedrum 6 where the laundry is located. - According to an embodiment, a
control system 25, e.g., an electronic board, in connection with amotor 26 that rotates thedrum 6 and with one or more electrovalves 27 of thewater loading system 9, is configured so as to position, during one or more detergent introduction steps, thefunnel 21 under theoutlet opening 11, 11' and substantially vertically aligned therewith. In this manner, theflow 30 of detergent or water-detergent mixture coming from theoutlet opening 11, 11' may fall by gravity directly into thecavity 23 of thefunnel 21. - According to an embodiment, the
control system 25 is configured to maintain the detergent transfer position for a time interval from 5 seconds to 240 seconds, preferably 5 seconds to 60 seconds. - According to a further embodiment, the
control system 25 and thewater loading system 9 are configured so as to generate the above-mentionedflow 30 of detergent or water-detergent mixture in the form of a forced or pressurized jet, so as to accelerate the passage of the detergent through thefunnel 21 into thedrum 6. - Advantageously, the outlet opening(s) 11, 11' is/are formed from
tubular portions 29 extending or projecting downwardly (during the operation of thelaundry washing machine 1 and/or when thelid 4 is closed) from abottom wall 28 of thedetergent basin 10, so as to allow the formation of a liquid column that increases the conveying pressure of the detergent or water-detergent mixture flow 30. - As it can be seen, for example, in
Figs. 3 and 4 , the tubular portion(s) 29 can be tapered toward the lower end (forming theoutlet opening 11, 11') in order to obtain adetergent flow 30 that is as compact and targeted as possible. - In accordance with an embodiment, the
detergent basin 10 can form at least oneinverted syphon 32 with anauxiliary discharge opening 31 and configured to activate and empty the detergent basin or one or more individual detergent compartments when athreshold filling level 33 is reached (Fig.3 ). This ensures an emergency operation of thelaundry washing machine 1 even in the case of an obstruction of theoutlet opening 11, 11' of thedetergent basin 10. - In an embodiment, the
inverted syphon 32 can be formed by an ascendingtube 34 projecting from the basin bottom upwardly, and a descendingtube 35, which is inserted from above onto the ascendingtube 34 and having a closed upper end. - In a preferred embodiment, at least one of said funnels 21 is shaped, preferably by injection moulding, in a
plastic portion 36 of thecircumferential wall 12. This facilitates the implementation of the (relatively high) depth and optimal shape of thecavity 23 and the optimal shape and length of the throughholes 24, which could be more hardly obtained from stainless steel by a press. - Advantageously, the
plastic portion 36 is formed in at least one of thedoors 8, 8'. These can be formed, for example, by a metal load-bearing frame and theplastic portion 36, which is for example, over-moulded on the metal frame. This involves a synergistic advantage in terms of handling comfort of the door by a user (for example, a women having delicate hands), manufacturing ease of thedoor 8, 8' and implementation of thefunnel 21. - The through holes 24 can be formed in tubular portions projecting from an inner surface of the
circumferential wall 12 towards the inside of the drum. By virtue of the length/diameter ratio, larger than 1 of the throughholes 24, they create (after an initial filling thereof) a suction, which further promotes the transfer of the detergent from theouter cavity 23 into thedrum 6. - Alternatively or in addition, the funnel(s) 21 can be also formed in a metal portion of the
circumferential wall 12. - In embodiments, the funnel(s) 21 can be formed in the
door 8, 8' and/or in a zone of thecircumferential wall 12 far from the door, for example, diametrically opposite it, and/or at alaundry dragging blade 20 of thedrum 6. The dragging blade could be formed, for example, by thecircumferential wall 12 or connected from inside to thecircumferential wall 12, and thecavity 23 of thefunnel 21 could be formed inside the overall dimensions of the dragging blade or by the dragging blade itself. - In accordance with an embodiment (
Fig. 2 ), the throughholes 24 of thefunnel 21 have a width or diameter that is larger than the diameter ofsmall holes 37 formed in thecircumferential wall 12 outside thefunnel 21. This allows a better transfer of the water-detergent mixture in the localised zone of the funnel 21 (possibly, made of plastic) and obviates damages to the laundry due to toolarge holes 37 in the remaining zones of thecircumferential wall 12 that is made of steel sheet. - By way of an advantageous, non-limiting example, the through
holes 24 of thefunnel 21 have a width or diameter ranging from 3mm to 12 mm, preferably 5mm to 8mm, still more preferably about 6mm. - The
cavity 23 of thefunnel 21 preferably has awidth 38 transversal to the direction of the throughholes 24 ranging between 6 ... 15 times, preferably from 8 12 times, the width of the individual through holes 24. Thewidth 38 of the cavity can be about 4cm ... 12 cm, preferably 4cm ... 8cm, still more preferably about 5cm 8cm. - The depth (radial with respect to the drum rotational axis) of the
cavity 23 can range from 0.5 cm to 10 cm, preferably from 1cm to 6cm, still more preferably from 1 cm to 4 cm. - The shape (in a top view) of the
cavity 23 can be, for example, circular, oval, or polygonal. - According to a still further embodiment, the
funnel 21, particularly thecavity 23, can be suitable to at least temporarily receive and hold atablet 41 or capsule containing a substance for treating laundry, for example, a pre-washing tablet or capsule. To this aim, thecavity 23 can have a fixed,small restraint edge 40 for a snap-, interference-, or shape-fitting with thetablet 41. Alternatively, thesmall restraint edge 40 can be movable between an open position, in which it allows the insertion of thetablet 41 into thecavity 23, and a closed position, in which thesmall restraint edge 40 holds thetablet 41 in thecavity 23. The actuation (dissolution, dispensing, release) of the treating substance of thetablet 41 or capsule occurs by the water and/ordetergent flow 30 directed into the funnel and acting on thetablet 41 or capsule. - From the description hereto provided, those skilled in the art will of course appreciate how the
laundry washing machine 1 and thelaundry drum 6 solve the problems mentioned with reference to the prior art, and achieve the objects of the invention which have been explained in the introductive section. - It shall be apparent that, to the laundry washing machine and the laundry drum according to the present invention, those skilled in the art, in order to meet contingent, specific needs, will be able to make further modifications and variations, all of which anyhow fall within the protection scope of the invention, as defined by the following claims.
Claims (15)
- A laundry drum (6) for a top-loading laundry washing machine (1) of the type having a detergent basin (10) in connection with a water loading system (9) and having one or more outlet openings (11, 11') arranged above an outer wall (12, 42) of the drum (6) mounted in said top-loading laundry washing machine (1), so as to be able to dispense a water-detergent flow (30) on the outer wall (12, 42) of the drum (6),
said drum (6) having said outer wall (12, 42) comprising a circumferential wall (12) forming a laundry loading aperture (5) and one or more doors (8, 8') for opening and closing the laundry loading aperture (5),
wherein the outer wall (12, 42) forms one or more funnels (21) for receiving and transferring at least one part of the water-detergent flow (30) into the drum (6), said funnel (21) having a cavity (23) that is open and facing radially outwardly of the drum (6), as well as a plurality of through holes (24) extending from the cavity (23) into the drum (6),
characterized in that said one or more funnels (21) are formed in said one or more doors (8, 8'). - A top-loading laundry washing machine (1), comprising:- a housing (2) with an upper access opening (3) that can be opened and closed by a lid (4),- a perforated drum (6) according to claim 1 rotatably located within a washing tub (7) in the support structure (2),- a detergent basin (10) in connection with a water loading system (9) and having one or more outlet openings (11, 11') arranged above the outer wall (12, 42) of the drum (6) so as to be able to dispense a water-detergent flow (30) on the outer wall (12, 42) of the drum (6),- a control device (25) in connection with a motor (26) for the rotation of the drum (6) and one or more electrovalves (27) of the water loading system (9), said control device (25) being configured so as to position, during one or more detergent introduction steps, the drum (6) with the funnel (21) for a predetermined duration in a detergent transfer position in which the water-detergent flow (30) exiting the outlet opening (11, 11') is directed into the funnel (21).
- The laundry washing machine (1) according to claim 2, wherein the predetermined duration of the detergent transfer position ranges in a time interval selected in the group consisting of:5 seconds to 240 seconds,5 seconds to 60 seconds.
- The laundry washing machine (1) according to claim 2, wherein, in said detergent transfer position, the funnel (21) is under the outlet opening (11, 11') and substantially vertically aligned with the outlet opening (11, 11').
- The laundry washing machine (1) according to claim 2, wherein the control system (25) and the water loading system (9) are configured so as to generate the water-detergent flow (30) as a forced or pressurized jet, so as to accelerate the detergent passage through the funnel (21) within the drum (6).
- The laundry washing machine (1) according to claim 2, wherein the outlet opening (11, 11') is formed from a tubular portion (29) extending downwardly from a bottom wall (28) of the detergent basin (10).
- The laundry washing machine (1) according to claim 6, wherein the tubular portion (29) is tapered toward a lower end thereof forming the outlet opening (11, 11').
- The laundry washing machine (1) according to claim 2, wherein the detergent basin (10) forms at least one inverted syphon (32) with an auxiliary discharge opening (31) and configured to activate and empty one or more detergent compartments of the detergent basin (10) when a threshold filling level (33) is reached.
- The laundry washing machine (1) according to claim 2, wherein at least one of said one or more funnels (21) is formed by injection moulding in a plastic portion (36).
- The laundry washing machine (1) according to claim 9, wherein the plastic portion (36) is formed in at least one of the doors (8, 8').
- The laundry washing machine (1) according to claim 2, wherein the through holes (24) are formed in tubular portions projecting from an inner surface of the circumferential wall (12) towards the inside of the drum (6).
- The laundry washing machine (1) according to claim 2, wherein the through holes (24) have a width larger than the diameter of small holes (37) formed in the circumferential wall (12) outside the funnel (21).
- The laundry washing machine (1) according to claim 12, wherein the through holes (24) have a width selected in the group consisting of:3mm to 12 mm,5mm to 8mm,6mm,wherein the cavity (23) has a width (38) transversal to the direction of the through holes (24) selected in the group consisting of:6 to 15 times the width of the individual through holes (24),8 to 12 times the width of the individual through holes (24),wherein the width (38) of the cavity is selected in the group consisting of:4cm to 12 cm,4cm to 8cm,5cm to 8cm,wherein a depth of the cavity (23) is selected in the group consisting of:0.5 cm to 10 cm,1cm to 6cm,1cm to 4 cm.
- The laundry washing machine (1) according to claim 12,
wherein the cavity (23) has a width (38) transversal to the direction of the through holes (24) ranging between 6 to 15 times, or from 8 to 12 times, the width of the individual through holes (24),
wherein the width (38) of the cavity ranges:- between 4cm and 12 cm, orbetween 4cm and 8cm, or- between 5cm and 8cm,wherein a depth of the cavity (23) ranges:- from 0.5 cm to 10 cm, or- from 1cm to 6cm, or- from 1cm to 4 cm. - The laundry washing machine (1) according to claim 2, wherein the cavity (23) is shaped so as to at least temporarily receive and hold a tablet (41) or capsule containing a substance for treating laundry.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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ITMI20140483 | 2014-03-21 |
Publications (2)
Publication Number | Publication Date |
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EP2921585A1 EP2921585A1 (en) | 2015-09-23 |
EP2921585B1 true EP2921585B1 (en) | 2017-08-16 |
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Application Number | Title | Priority Date | Filing Date |
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EP15156247.7A Active EP2921585B1 (en) | 2014-03-21 | 2015-02-24 | A top-loading laundry washing machine and a laundry drum for such machine |
Country Status (4)
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EP (1) | EP2921585B1 (en) |
CN (1) | CN104928882B (en) |
ES (1) | ES2647474T3 (en) |
RU (1) | RU2683195C2 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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CN109554893B (en) * | 2017-09-26 | 2022-04-12 | 合肥海尔滚筒洗衣机有限公司 | Top-opening drum washing machine and inner drum thereof |
DE102018125476A1 (en) * | 2018-10-15 | 2020-04-16 | Miele & Cie. Kg | Washing machine |
CN111379141B (en) * | 2018-12-29 | 2023-05-02 | 合肥海尔洗衣机有限公司 | Upper cover structure of washing machine and washing machine with upper cover structure |
CN114108219A (en) * | 2020-08-28 | 2022-03-01 | 青岛海高设计制造有限公司 | Washing machine |
CN114990856B (en) * | 2022-07-05 | 2024-03-08 | 湖北美的洗衣机有限公司 | Box assembly is put in to gel pearl, clothing treatment agent box and washing equipment |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1204688B (en) * | 1987-06-05 | 1989-03-10 | San Giorgio Elettrodomesti | WASHING MACHINE WITH BASKET EQUIPPED WITH MEANS SUITABLE FOR THE DISTRIBUTION OF WASHING WATER |
DE4342626C2 (en) * | 1993-12-14 | 2002-10-02 | Bsh Bosch Siemens Hausgeraete | Device for supplying feed water and / or detergent in a drum-type washing machine that can be loaded on the jacket side |
CN1066223C (en) * | 1995-05-31 | 2001-05-23 | Bsh博施及西门子家用器具有限公司 | Device for adding water and/or detergent for casing side-fed drum washer |
JP2004194822A (en) * | 2002-12-17 | 2004-07-15 | Sanyo Electric Co Ltd | Drum type washing machine |
EP2138626B1 (en) * | 2008-06-24 | 2010-06-30 | CANDY S.p.A. | Device for releasing washing and / or rinsing liquid into the rotating drum of a laundry washing machine |
JP2014050501A (en) * | 2012-09-06 | 2014-03-20 | Panasonic Corp | Washing machine |
-
2015
- 2015-02-24 ES ES15156247.7T patent/ES2647474T3/en active Active
- 2015-02-24 EP EP15156247.7A patent/EP2921585B1/en active Active
- 2015-03-17 CN CN201510117687.1A patent/CN104928882B/en active Active
- 2015-03-20 RU RU2015109948A patent/RU2683195C2/en active
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CN104928882B (en) | 2019-05-17 |
RU2015109948A3 (en) | 2018-09-11 |
RU2015109948A (en) | 2016-10-10 |
CN104928882A (en) | 2015-09-23 |
EP2921585A1 (en) | 2015-09-23 |
RU2683195C2 (en) | 2019-03-26 |
ES2647474T3 (en) | 2017-12-21 |
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