EP2343409B1 - Machine à laver - Google Patents

Machine à laver Download PDF

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Publication number
EP2343409B1
EP2343409B1 EP10196551.5A EP10196551A EP2343409B1 EP 2343409 B1 EP2343409 B1 EP 2343409B1 EP 10196551 A EP10196551 A EP 10196551A EP 2343409 B1 EP2343409 B1 EP 2343409B1
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EP
European Patent Office
Prior art keywords
drum
water
wash water
nozzle
nozzles
Prior art date
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Application number
EP10196551.5A
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German (de)
English (en)
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EP2343409A1 (fr
Inventor
Katsuya Wakita
Mikio Tahara
Shigeharu Nakamoto
Kenji Terai
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Panasonic Corp
Original Assignee
Panasonic Corp
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.)
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Publication date
Priority claimed from JP2010002531A external-priority patent/JP5493884B2/ja
Priority claimed from JP2010125594A external-priority patent/JP5671687B2/ja
Application filed by Panasonic Corp filed Critical Panasonic Corp
Priority to EP13167999.5A priority Critical patent/EP2634303B1/fr
Priority to EP13168001.9A priority patent/EP2631349B1/fr
Publication of EP2343409A1 publication Critical patent/EP2343409A1/fr
Application granted granted Critical
Publication of EP2343409B1 publication Critical patent/EP2343409B1/fr
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    • 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

Definitions

  • the present invention relates to drum-type washing machines that wash clothes and others.
  • a conventional drum-type washing machine is disclosed in, e.g. Unexamined Japanese Patent Application Publication No. H10-127978 (Patent Literature 1).
  • This washing machine includes a pump for supplying wash water stored in a water tub into a water circulating path and a nozzle having multiple holes through which the wash water jets from this side of a rotating drum toward an inner part of the drum.
  • the nozzle is placed in front of the drum and the multiple holes are formed at slightly different angles from each other, so that clothes loaded in the drum can get wet fast.
  • the rpm of the drum is controlled to prevent the wet clothes from tangling with non-wet clothes or clustering between the wet clothes.
  • Fig. 17 is a lateral cross section schematically illustrating a method for jetting wash water of the drum-type washing machine.
  • Fig. 18 is a perspective view of nozzle 26 in part.
  • the drum-type washing machine is formed of: housing 1, water tub 2, rotary drum 4, motor 44, pump 21, water shut off valve 6, drain valve 19, water circulating path 20, feed valve 15, vents 13, drain path 18, drain port 17, door 7, motor pulley 40, driving belt 41, driving pulley 42, tank 43, and nozzle 26.
  • the dotted lines in Fig. 17 indicate the jets of wash water.
  • Nozzle 26 shown in Fig. 18 includes inlet 24 through which the wash water to be jetted is supplied, and multiple nozzle holes 31 having openings at different positions.
  • the wash water is jetted from multiple holes 31 of which openings are formed at different positions from each other, where the wash water jets from door 7 toward the inner part of drum 4.
  • the foregoing conventional drum-type washing machine jets the wash water from the door side toward the inner part of drum 4 through nozzle 26 placed above drum 4 at the door side, thereby wetting the laundry for washing.
  • This method fails to practically wet the laundry when a small volume of laundry is loaded in drum 4 because the water jetted in parts fail to hit the laundry but hit the drum directly.
  • the wash water jetted in parts only hit the laundry near to the nozzles or nozzle holes, so that nozzle 26 also fails to wet the laundry uniformly or in a wider area. In these cases, wash performance for the entire laundry cannot be improved.
  • the nozzle Since the nozzle has multiple nozzle-holes, greater pressure loss is incurred during the water supply from the circulating path to the individual holes. As a result, a smaller amount of wash water is jetted from each one of the nozzle holes, so that it is difficult to wet the clothes quickly and uniformly.
  • a nozzle greater in size is used, and multiple nozzles are provided in the water tub for jetting the wash water over the greater area.
  • these measures cause the laundry rotating in the rotary drum to tangle with the nozzles.
  • US 2009/0249840 A1 relates to a washing machine according to the preamble of claim 1 and thus to a front loader drum-type washing machine.
  • This know washing machine uses different connection tubes, one per nozzle, and nozzle heads which are including many different outlets.
  • GB 2 308 388 A relates to a pulsator type washing machine having a spraying nozzle assembly.
  • This washing machine has a spraying nozzle assembly which evenly and strongly sprays a circulated washing liquid onto laundry to be washed.
  • the washing machine has a housing, an outer tub disposed in the housing so as to receive the washing liquid, a spin tub accommodated in the outer tub, an outer tub cover mounted on the outer tub, and a spraying nozzle assembly for spraying the washing liquid onto the article to be washed which is loaded in the spin tub.
  • the spin tub rotates around a vertical axis and laundry therein is accessible through an opening at the top of the housing.
  • US 2010/0000266 A1 also relates to a pulsator type washing machine having very similar features compared to GB 2 308 388 A .
  • US 2003/0061843 A1 relates to a drum type washing machine.
  • This washing machine includes a tub with a rotary tub rotatably set into the water tub, and a water turbine which is mounted at an open front of the rotary tub and rotates along with the rotary tub to convey the wash water contained in the water tub into the rotary tub.
  • the structure discussed above allows the wash water conveyed by the pump into the water tub to jet over a greater area, thereby exposing the laundry agitated in the rotary drum to the wash water more frequently. As a result, the wash water can be supplied all over the laundry in the drum, thereby wetting the laundry uniformly, and improving the performance of wash and rinse.
  • the opening side of the rotary drum of the drum-type washing machine is referred to as a front, a front side, a front section, or a front face, and the opposite side to the opening side is referred to as a rear, a rear side, a rear section or a rear face.
  • Fig. 1 is a sectional view of a drum-type washing machine in accordance with the first embodiment of the present invention.
  • This drum-type washing machine as shown in Fig. 1 , comprises the following elements: housing 1, water tub 2, suspension 3, rotary drum 4, openings 5 and 6, door 7, motor 9, protrusion 12, feed valve 15, drain valve 19, water circulating path 20, pump 21, nozzle water path 22, nozzle 26.
  • the washing machine further comprises controller 32 mounted on a rear bottom in housing 1 for controlling motor 9, feed valve 15, drain valve 19, and pump 21 as well as controlling the steps of wash, rinse, and spin-dry based on a given program.
  • Water tub 2 shaped like a cylinder having a bottom is resiliently supported by suspension 3 in housing 1.
  • Rotary drum 4 shaped like a cylinder having a bottom is placed rotatably in water tub 2.
  • Rotary axis 4a of drum 4 substantially agrees with the center line on which rotary drum 4 rotates, and also substantially agrees with the center line on which water tub 2 rotates.
  • Tub 2 and drum 4 have circular openings 5 and 6 respectively, on the front, i.e. the place where door 7 is mounted.
  • Rotary axis 4a tilts rearward (front-up and rear-down) by, e.g. 1.0 - 20 degrees relative to the horizontal 4b, so that water tub 2 can be situated in housing 1.
  • door 7 is placed on the front of housing 1 for loading or unloading the laundry into or from drum 4.
  • Bellows 8 made of elastic material such as rubber is placed around opening 5 of water tub 2, so that shut of door 7 bites a rim of bellows 8 at inner face of door 7 for sealing door 7 shut.
  • Motor 9 is mounted at the opposite end (rear face of water tub 2) to opening 5 of water tub 2 for driving drum 4.
  • the rotor of motor 9 is connected to drum 4 via rotary shaft 10 which transmits the spin of motor 9 to drum 4.
  • Cylindrical wall 11 of drum 4 has multiple projections 12 projected toward rotary axis 4a. The laundry is caught on projections 12 and lifted, and then falls from a height to the bottom. This action is repeated during the rotation of drum 4.
  • numerous vents 13 are formed all over cylindrical wall 11, so that when wash water is stored in water tub 2 up to a given level, the wash water enters into drum 4 through vents 13.
  • Detergent container 14 is placed above water tub 2, and connected to feed valve 15 which connects with a tap of a water supply. Open or close of feed valve 15 supplies the tap water or halts the supply to detergent container 14. Water-feed path 16 is connected to the underside of detergent container 14 so that the detergent is supplied to water tub 2 together with the water entered container 14.
  • Drain port 17 is formed on the underside of water tub 2 for discharging the wash water stored in tub 2, and drain path 18 is connected to drain port 17 for conveying the wash water to the outside of housing 1. Drain valve 19 is placed somewhere in path 18 for closing path 18.
  • Circulating path 20 connected to drain port 17 branches off from drain path 18 so that the wash water discharged from tub 2 can circulate via rotary drum 4 into water tub 2 again.
  • Circulating path 20 is laid under water tub 2 such that it extends from the rear to the front and lies almost horizontally.
  • Driving pump 21 placed somewhere in circulating path 20 draws the wash water stored in water tub 2 from drain port 17 into path 20, and pressurizes the wash water flowing in path 20 for conveying it into drum 4. This mechanism allows the wash water stored in water tub 2 to run through path 20 and circulate to tub 2.
  • Nozzle water path 22 is formed inside the front face of water tub 2, to be more specific, on the inner face of opening 5 viewed from opening 6 of drum 4 and outside of rim 23a of circular opening 6 of drum 4.
  • Nozzle water path 22 is shaped like a circle, which is approx. concentric (including concentric) with opening 5 of tub 2 and opening 6 of drum 4.
  • Inner rim 23a of path 22 is placed outside rim 23a of opening 6 in the radial direction.
  • FIG. 2 shows a sectional view of an essential part of the drum-type washing machine in accordance with the first embodiment.
  • flow-in port 25 is formed at an upper section of circulating path 20 such that port 25 communicates with path 20.
  • Nozzles 26 are provided at an upper section of nozzle water path 22 which is formed circularly outside rim 23a of opening 6.
  • Space 27 is provided between nozzle 26 and rim 23a.
  • Reflector 28 is provided in space 27 for the wash water jetted into space 27 to reflect thereon toward opening 6. The jetted wash water can be thus guided to opening 6 and then into drum 4.
  • Reflector 28 is formed annularly around opening 5 and confronts the front of rotary drum 4.
  • Reflector 28 includes hit-face 28a tilting relative to the jet stream from nozzle 26. This tilt avoids scattering the wash water in all directions and allows the jet stream of wash water to land stably on hit-face 28a, thereby diffusing the wash water along hit-face 28a. As a result, the wash water can be sprayed over the laundry in drum 4 in a stable manner.
  • a smaller tilt angle of hit-face 28a relative to the jet direction from nozzle 26 allows the jet stream to land more stably on hit-face 28a and diffuse over a greater area.
  • reflector 28 is formed of only hit-face 28a, a small tilt angle of hit-face 28a fails to guide the jet stream into the inner part of drum 4, and the wash water is sprayed onto only the clothes located at the front part of drum 4.
  • guide-face 28b is formed on the inner rim of reflector 28, and the tilt angle of reflector 28 relative to the jet direction is set smaller than that of guide-face 28b.
  • This structure allows setting the tilt angle of hit-face 28a gently relative to the jet direction from nozzle 26, whereby the jet stream of the wash water can land at hit-face 28a more steadily and diffuse over a wider area regardless of the direction which guides the jet stream into drum 4.
  • the jet stream is guided by guide-face 28b along the direction toward inside drum 4, so that the wash water can be sprayed over the laundry in drum 4 in a steady diffusing manner.
  • the length of guide-face 28b is set shorter than that of hit-face 28a because it is necessary for hit-face 28a to have a greater contacting area than a hitting area of the jet stream so that the jet stream can stably land on hit-face 28a and diffuse. Since guide-face 28b functions only as changing the jet stream direction, a smaller contacting area of guide-face 28b than that of hit-face 28a works good. This structure allows minimizing the reduction in the flow velocity at guide-face 28b, thereby spraying the wash water more strongly over the laundry. As a result, the performance of wash and rinse can be improved.
  • the jet stream from nozzle 26 should run to reflector 28, so that a water-guide wall, which is regularly used in a conventional washing machine, is omitted from Fig. 2 .
  • Omission of the water-guide wall allows the jet stream from nozzle 26 to flow into space 27, and then hit the hit-face 28a, and diffuse into drum 4 through opening 6 with the aid of guide-face 28b.
  • the mechanism allows nozzle 26 to be located away from the rim of opening 6 of drum 4 while the jet stream from nozzle 26 can be guided into rotary drum 4 free from adverse resistance from the wall. As a result, this structure allows minimizing the reduction in the flow velocity, thereby spraying the wash water more strongly over the laundry in drum 4.
  • Nozzle 26 is not necessarily shaped like a flat tube which is required for running along the water guide wall, but its cross-sectional area should equal to that of the flat one, so that the cross section of nozzle 26 is shaped like, e.g. a round hole because this shape invites the least pressure loss.
  • This shape allows minimizing the reduction in volumetric flow of the wash water jetted from nozzle 26, so that a sufficient quantity of the wash water can be supplied to the laundry in drum 4.
  • Reflector 28 diffuses the bar-shaped jet stream, so that the wash water can be sprayed in a wide area over the laundry in rotary drum 4. As a result, the performance of wash and rinse can be improved.
  • Fig. 3 is a fragmentary view taken along arrows 3 - 3 of the drum-type washing machine shown in Fig. 1 .
  • Fig. 3 shows the structure viewed from opening 6 of rotary drum 4.
  • nozzle water path 22 is provided with flow-in port 25 at the lower a section.
  • Nozzle water path 22 runs along the shape of water tub 2, so that path 22 shapes approx. annularly (including a circle), and it branches off at port 25 to both sides and the two branched paths extend to end parts 22a respectively.
  • the water flowing in path 22 is split into two streams which run long and approx. annularly (including a circle) such that the streams surround opening 5. This split makes each one of the streams short, which reduces the pressure loss in nozzle water path 22.
  • Nozzle water path 22 is not necessarily provided with end parts 22a, so that path 22 can be formed seamlessly. In this case, since the water flow is also split into two directions at flow-in port 25, an advantage similar to what is discussed above is obtainable.
  • the wash water flows into nozzle water path 22 from flow-in port 25 along the direction toward rotary axis 4a (direction indicated by arrow C in Fig. 3 ).
  • This structure allows the streams to branch off smoothly in two directions, thereby applying sufficient pressures onto respective nozzles 26a - 26g. As a result, this structure can increase the velocity of the jet streams.
  • path 22 is preferably structured to avoid this possible problem. For instance, a path running clockwise and another path running counterclockwise are prepared so that the wash water cannot dash against each other at port 25.
  • multiple nozzles 26a - 26g provided in nozzle water path 22 are supposed to jet the wash water toward rotary axis 4a (e.g. nozzle 26c is supposed to jet the wash water along the alternate long and short dash line); however, the jet direction is shifted from the alternate long and short dash line to the arrow line by angle ⁇ 1.
  • Respective nozzles 26a - 26g are thus shifted toward the same direction by the same angle ⁇ 1 (shift angle). This structure allows enlarging the area over which the wash water can be sprayed, so that the wash water can be supplied all over the laundry in an efficient manner.
  • shift angle ⁇ 1 is set to be an approx. half of angle ⁇ 2 (e.g. 10 ⁇ 30 degrees) which defines the spread of the wash water diffusing along the rotary direction of drum 4, so that shift angle ⁇ 1 should be set at, e.g. 5 ⁇ 15 degrees.
  • nozzles 26 are formed at locations distant from rim 23a of opening 6 of rotary drum 4 as shown in Fig. 2 .
  • This structure allows nozzles 26 to spray the diffusing wash water over the laundry in drum 4 without exposing nozzles 26 to opening 6 of drum 4.
  • the laundry can be loaded or unloaded into/from drum 4 free from being caught on opening 6 and being torn.
  • the laundry can be loaded or unloaded with ease, so that better usability can be expected.
  • Fig. 4 is a sectional view of the nozzle of the drum-type washing machine in accordance with the first embodiment.
  • bulge section 29 is provided to a part of nozzle water path 22, and nozzle hole 31 shaped like, e.g. a circle, is formed on flat part 30 of bulge section 29. Thickness (depth) "L” of nozzle hole 31 is set not greater than diameter "d" thereof.
  • An extension of flat part 30 runs across the direction of the wash water jetted from nozzle hole 31 at right angles, and as shown in Fig. 3 , tilts by the shift angle ⁇ 1 of nozzle 26.
  • the wash water at bulge section 29 is isolated from the main stream (indicated by dotted line with arrow in Fig. 4 ) which flows in nozzle water path 22 to end part 22a, so that the main stream does not so much affect multiple nozzles 26a ⁇ 26g shown in Fig. 3 .
  • This mechanism thus prevents the streams jetted from multiple nozzles 26a ⁇ 26g from being disarranged, and makes the jet direction steadily.
  • the jet streams can be contracted, whereby the velocities of the streams can be increased. Stronger jet stream thus can be expected.
  • Fig. 5 is a sectional view illustrating a structure of an essential part of a nozzle widely used in drum-type washing machines.
  • inner wall 103 of nozzle water path 102 slants gently and smoothly toward nozzle hole 101, thereby narrowing nozzle hole 101, in order to minimize pressure-loss.
  • This structure keeps preventing the water flowing through path 102 from separating from inner wall 103 until just before the flow is jetted from nozzle hole 101, otherwise this separation would incur turbulence. Nozzle 100 inviting smaller pressure loss is thus obtainable.
  • the velocity of the jet stream from nozzle hole 101 is determined by the cross sectional area of hole 101, so that a greater quantity of flow or a smaller cross sectional area of hole 101 is needed to increase the velocity of the jet stream.
  • Increment in the circulation flow running through circulating path 20 which supplies the wash water to nozzle water path 22 lowers the water level in water tub 2, thereby inviting air with ease to enter pump 21, which then falls into "air-biting" state, and the circulation flow decreases contrary to the expectation.
  • the increment in the quantity of flow in circulating path 20 is thus limited when a washing is done with a small amount of water stored in water tub 2. At this time, waste thread produced from the laundry will clog path 20, and to avoid such a reliability problem, there should be a limitation on reducing the cross sectional area of nozzle hole 31.
  • bulge section 29 swelling out toward rotary axis 4a of drum 4 is thus formed, and flat part 30 formed approx. vertically (including vertical) relative to the extending direction of nozzle hole 31 is also provided around hole 31.
  • the flow around inner wall face 22b, formed by bulge section 29, of nozzle water path 22 tries to flow along inner wall face 22b due to its viscosity; however, the stream jetted from hole 31 is separated from the inside wall of nozzle hole 31 because inner wall face 22b sharply bends by approx. 90 degrees.
  • Nozzle 26 in accordance with this first embodiment achieves a greater velocity of flow and a stronger jet stream than a conventional nozzle under the condition where nozzle 26 has the same cross sectional area as the conventional one and both of the subject nozzles and the conventional ones are used in the same quantity of flow.
  • the sectional view of nozzle hole 31 cut along line 4 - 4 of Fig. 4 is, e.g. a circle, and this structure allows contracting the jet stream uniformly, preventing the jet stream from being disarranged, and jetting the wash water along a given direction for spraying the wash water over the laundry.
  • Circular nozzle hole 31 has no projections therein, so that the waste thread produced from the laundry is hardly caught in hole 31, which can be thus prevented from being clogged by the waste thread.
  • Thickness "L” of nozzle hole 31 is set not greater than diameter "d” thereof, because if the length of hole 31 along the jet direction is too long, the contracted flow separated from the inside wall of hole 31 flares gradually before the flow is jetted, which cancels the advantage of increasing the velocity of flow. This is the reason why thickness "L” of nozzle hole 31 is preferably set not greater than diameter "d” thereof.
  • a water level of the wash water stored in water tub 2 with a water level sensor (not shown).
  • the water level sensor senses the amount of water determined in response to an amount of the laundry. Then halt the water supply before starting the washing.
  • Motor 9 rotates drum 4 forward or backward, and the laundry accommodated in drum 4 is lifted along the rotating direction with projections 12 provided on cylindrical wall 11 of drum 4, and then the laundry falls.
  • the lift & fall action referred to as "tumbling", washes the laundry.
  • the water level of the wash water is preferably set appropriately to obtain effective tumbling (beat wash).
  • the wash water cannot permeate throughout the laundry, so that the wash water in tub 2 is drawn by pump 21 into circulating path 20 via drain port 17 provided at the bottom of tub 2, and the wash water is then jetted over the laundry in drum 4.
  • pump 21 pumps the wash water into water tub 2, and the wash water then runs through circulating path 20, passes through flow-in port 25 provided at nozzle water path 22, and flows into nozzle water path 22.
  • the wash water is then branched off to both sides and runs through annularly formed long path 22 to end parts 22a.
  • the wash water is then guided to multiple nozzles 26 (e.g. seven nozzles 26a - 26g are available in Fig. 3 ). At least three nozzles 26 are needed.
  • the wash water is jetted from nozzles 26a - 26g in a bar-like shape into space 27 formed at rotary axis 4a side.
  • the wash water jetted into space 27 hits against hit-face 28a of reflector 28, and reflects toward opening 6 of rotary drum 4.
  • the wash water then diffuses along the rotating direction of drum 4, and the wash water is jetted from around rim 23a of opening 6 into drum 4 with the aid of guide-face 28b.
  • jet directions "a" (indicated in a solid line with arrow in Fig. 3 ) of respective nozzles 26a - 26g are shifted by angle ⁇ 1 from the directions (indicated in an alternate long and short dash line in Fig. 3 ) directed to rotary axis 4a.
  • This structure allows jetting the wash water uniformly in a wider area, so that the laundry agitated in drum 4 is more frequently exposed to the wash water. As a result, the wash water can be sprayed all over the laundry, and the performance of wash and rinse can be improved.
  • the jet directions of wash water from multiple nozzles 26 can be shifted from the direction to rotary axis 4a by different angles although they are shifted in unison as discussed previously.
  • This structure also allows jetting the wash water uniformly in a wider area, so that the laundry agitated in drum 4 is more frequently exposed to the wash water. As a result, the wash water can be sprayed all over the laundry, and the performance of wash and rinse can be improved.
  • At least one nozzle e.g. nozzle 26g, among multiple nozzles 26 is preferably placed close to the upper end of rim 23a of opening 6 so that nozzle 26g can jet the wash water into drum 4.
  • This structure allows spraying the wash water from around the upper most point to the laundry, and the wash water jetted over the laundry flows downward due to gravitation, thereby wetting the laundry covered with the other laundry.
  • the starting operation is discussed above, and this operation can be used at the rinse, so that pump 21 works even at the rinse, and rinse water can be sprayed uniformly all over the laundry. As a result, the laundry can be rinsed efficiently within a shorter time.
  • the dewatering step is done for a given time before the operation ends.
  • a drying device can be added for carrying out a drying step following the dewatering step.
  • Fig. 6 is a fragmentary view taken along arrows 3 - 3 of a drum-type washing machine shown in Fig. 1 in accordance with the second embodiment.
  • the second embodiment differs from the first one in placing nozzle water path 22 at any place except just under (along the perpendicular direction from) rotary axis 4a.
  • Other structures remain unchanged from those of the first embodiment, so that detailed descriptions thereof are borrowed from the first one.
  • the wash water usually gathers at a lower section of drum 4, so that the laundry lying in the lower part is always supplied with the wash water.
  • the wash water jetted from nozzle 26 may be sprayed over the laundry from under rotary axis 4a upward along the perpendicular direction.
  • this upward jet stream produces poor effect.
  • Nozzle water path 22 is thus placed at any place other than the place just under (along perpendicular direction from) rotary axis 4a. This structure allows supplying the wash water efficiently and uniformly all over the laundry, so that the performance of wash and rinse can be improved.
  • nozzle 26a is apart from nozzle 26c by less than 180 degrees.
  • No nozzle water path 22 exists between nozzle 26a and nozzle 26c.
  • nozzle water path 22 is shaped like an arc including approx. 240 degrees and surrounding rotary axis 4a.
  • Respective nozzles 26a - 26c are equidistantly placed, i.e. at equal intervals of 120 degrees.
  • nozzle 26a is placed at left lower side viewed from the opening of the rotary drum and relative to rotary axis 4a, and nozzle 26c is placed at right lower side, and nozzle 26b is placed at upper side.
  • at least one nozzle is provided at each place, i.e. the upper, lower, right and left sides relative to rotary axis 4a.
  • This structure allows multiple nozzles 26a - 26c to jet the wash water along upward, downward, leftward, and rightward directions to the laundry in drum 4 while the jet streams diffuse along the rotating direction.
  • the laundry rotated following the rotation of drum 4 can be exposed to the wash water more frequently regardless of the location of the laundry in drum 4, so that the wash water can be sprayed uniformly all over the laundry.
  • Flow-in port 25, through which the wash water flows into nozzle water path 22, is formed at a place other than around the upper end of nozzle water path 22.
  • the reason of this limited location is this:
  • pump 21 pumps out the wash water to nozzle water path 22 through flow-in port 25, the air initially trapped in path 22 is exhausted from nozzles 26a - 26c, and then path 22 is filled with the wash water.
  • the air tends to gather around the upper end of path 22, so that a supply of the wash water from the upper end of path 22 will stir the air gathered, and then the air disperses in path 22 if nozzle water path 22 is long.
  • streams of water mixed with air are jetted from nozzles 26, so that the streams are disarranged and louder noises are produced at the jet.
  • Flow-in port 25 is thus placed at the place in order to avoid the foregoing problems, namely, at the place other than around the upper end of path 22, thereby preventing the air from being stirred and preventing the jet water stream from being mixed with air. The disarrangement of the jet streams and the loud noise at the jet thus can be prevented.
  • nozzle water path 22 should not be laid just under rotary axis 4a (along the perpendicular direction); however, path 22 can be laid just under axis 4a while nozzles 26 should not be placed there.
  • This structure allows spraying the wash water efficiently and uniformly all over the laundry, and the performance of wash and rinse can be improved.
  • Fig. 7 is a fragmentary view taken along arrows 3 - 3 of the drum-type washing machine shown in Fig. 1 for illustrating the third embodiment of the present invention.
  • the third embodiment employs nozzles 26a - 26g that are equidistantly apart from each other with intervals of angle ⁇ 3 therebetween.
  • the other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • nozzle water path 22 is laid approx. annularly (including a circle) to surround almost entire circumference around rotary axis 4a.
  • the number of multiple nozzles 26 is determined in response to the length of path 22. For instance, seven nozzles 26a - 26f are equidistantly placed in path 22 with approx. the same intervals (including the same intervals) of angle ⁇ 3 therebetween, i.e. in this case angle ⁇ 3 is 360/7 degrees.
  • This structure allows nozzles 26a - 26f to jet the wash water uniformly into drum 4. As a result, the laundry can be exposed more frequently to the wash water, and the wash water can be supplied more uniformly to the laundry.
  • the wash water is jetted toward rotary axis 4a, i.e. the wash water to be supplied to the laundry is jetted toward the center of drum 4.
  • This structure allows the wash water to resist flowing out through vents 13 formed on cylindrical wall 11 to the outside of drum 4. As a result, the laundry can be wetted efficiently.
  • Fig. 8 is a fragmentary view taken along arrows 3 - 3 of the drum-type washing machine shown in Fig. 1 for illustrating the fourth embodiment of the present invention.
  • the fourth embodiment employs nozzles 26a - 26g of which at least one jet direction is different from the other jet directions. This is the different point from the first embodiment.
  • a jet direction from, e.g. nozzle 26c and a direction toward rotary axis 4a from nozzle 26c viewed from the opening of drum 4 includes an angle.
  • the other nozzles also form angles between their jet direction and the directions toward axis 4a.
  • at least one of the foregoing angles is formed differently from the other angles.
  • the other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • angle ⁇ 4 formed by nozzle 26c differs from angle ⁇ 5 formed by nozzle 26d such that angle ⁇ 5 is greater than angle ⁇ 4.
  • the laundry moves a little in drum 4 such that it rotates together with drum 4.
  • the structure discussed above allows the jet streams from nozzles 26a — 26g over the laundry to change their directions following the rotation of drum 4. As a result, the wash water can be supplied efficiently and uniformly all over the laundry.
  • Fig. 9 is a sectional view of a nozzle of a drum-type washing machine in accordance with the fifth embodiment of the present invention.
  • nozzle hole 31 is tapered, i.e. the diameter of hole 31 at the flow-in side of the wash water is smaller than the diameter at the flow-out side thereof.
  • the other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • nozzle hole 31 of nozzle 26 is tapered and its diameter at the flow-out side is "d1" and the one at the flow-in side is "d2", and d1 > d2 is established.
  • the flow around inner wall 22b of nozzle water path 22 tries to flow as close as possible to inner wall 22b due to the viscosity; however, the tapered hole 31 bends sharply inner wall 22b by well over 90 degrees at the place where the wash water is jetted from hole 31.
  • the flow of wash water thus separates at a greater distance than the conventional one from the inside wall of hole 31, so that the flow is contracted.
  • the structure discussed above thus contracts the jet stream of wash water for increasing the velocity thereof. As a result, stronger jet streams can be expected, and the performance of wash and rinse can be improved.
  • Fig. 10 is a sectional view of a nozzle of a drum-type washing machine in accordance with the sixth embodiment of the present invention.
  • flat part 30 where nozzle hole 31 is formed is swelled toward the flow-in side.
  • the other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • nozzle hole 31 forms an uphill slope toward the flow-in side, thereby increasing the height by "H” at hole 31, in other words, the location of hole 31 swells up toward the flow-in side by height "H".
  • the swell of flat part 30 can form either a slope or an arc.
  • Fig. 11 is a sectional view of a nozzle of a drum-type washing machine in accordance with the seventh embodiment of the present invention.
  • cylindrical rib is formed in a protruding manner on flat part 30 at the flow-in side of nozzle hole 31.
  • the other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • Fig. 12 - Fig. 14 are sectional views of a nozzle of the drum-type washing machine in accordance with the eighth embodiment.
  • Fig. 12 is a sectional view taken along line 13 - 13 in Fig. 6
  • Fig. 13 is a sectional view taken along line 14 - 14 in Fig. 6
  • Fig. 14 is a sectional view taken along line 15 - 15 in Fig. 6 .
  • Guide-face 28b is formed on reflector 28 which leads the wash water jetted from each one of multiple nozzles 26a - 26c into rotary drum 4.
  • Guide-face 28b includes a slope, of which angular part opposite to each one of nozzles 26a - 26c, tilts differently from another angular part thereof. There are at least two different tilt angles. This is a different point from the first embodiment. The other structures remain unchanged from those of the first embodiment, so that the detailed descriptions thereof are borrowed from the first one.
  • hit-faces 28a against which the wash water jetted from nozzles 26a - 26c hit, of nozzles 26a - 26c tilt at the same angle; however, guide-faces 28b, which guide the wash water hit against hit-faces 28a to opening 6 of drum 4, tilts differently among nozzles 26a - 26c.
  • the wash water jetted from nozzle 26a hits against hit-face 28a and flows along the arrow to guide-face 28b, of which function is to guide the wash water hit against hit-face 28a to opening 6, and guide-face 28b greatly tilts toward opening 6 relative to the jet stream of wash water.
  • the wash water thus jets along direction S1.
  • guide-face 28b of nozzle 26b tilts smaller than that of nozzle 26a, then the wash water jets along direction S2.
  • guide-face 28b of nozzle 26c tilts smaller than other two guides 26b, then the wash water jets along direction S3.
  • nozzle 26a to jet the wash water into drum 4 at the inside-front of drum 4, while nozzles 26b and 26c jet the wash water into drum 4 at inner-deep (bottom of drum 4), because each one of guides 26b tilt at different angles.
  • the wash water jetted from multiple nozzles 26a - 26c hits against respective hit-faces 28a, which tilt at the same angle, so that each wash-water diffuses in the same manner, and each guide-face 28b changes a direction along which the each diffusing water is supplied to the laundry.
  • the direction of supplying the wash water can be changed in response to the rotation of drum 4, so that the wash water can be supplied efficiently and uniformly to all over the laundry.
  • Fig. 15 is a fragmentary view taken along arrows 3 - 3 of Fig. 1 for illustrating the ninth embodiment of the present invention.
  • Fig. 16 illustrates a way of jetting the wash water from multiple nozzles 26.
  • the left drawing of Fig. 16 is a front sectional view of rotary drum 4 viewed from the front, i.e. from the opening, and the right drawing of Fig . 16 is a lateral sectional view of rotary drum 4.
  • Jet angle " ⁇ ” is preferably different from jet angle " ⁇ ”.
  • the foregoing structure allows reducing the hit areas between the streams of wash water jetted from nozzle 26a and nozzle 26b, although the streams run across with each other. This structure thus prevents the kinetic energy, produced when the wash water is jetted, from being lowered. As a result, the performance of wash increases, because the wash water having great kinetic energy can strip dirt off from the laundry, and can increase the force that allows the wash water to permeate into fibers more in depth.
  • jet angle " ⁇ " is set different from jet angle " ⁇ "
  • the streams of wash water lands at different places with respect to the depth direction of rotary drum 4.
  • the wash water thus can be sprayed all over the laundry even when the laundry spreads over in drum 4, so that the laundry can be wetted fast.
  • each one of nozzle holes of nozzles 26 has the same jetting area (diameter of hole); however, the present invention is not limited to these embodiments.
  • the wash water pumped out by pump 21 is conveyed to the upper side while its flow velocity in part is converted into potential energy, or the flow velocity is lowered due to resistance in a long nozzle water path 22. An amount of circulation flow is thus gradually reduced.
  • the jetting areas of nozzle holes of nozzles 26 are preferably changed in response to the locations of nozzles 26.
  • jetting areas of nozzles 26a laid at the upper front section of drum 4 are set greater than those of nozzles 26b laid closer to flow-in port 25 (e.g. at the lower front of drum 4).
  • This structure can prevent from reducing an amount of wash water jetted from nozzle 26a laid at an upper half of drum 4 even when the water pressure lowers, and can maintain the amount of wash water jetted from nozzle 26a at approx. the same amount jetted from nozzle 26b.
  • flow-in port 25 formed at an upper section of drum 4 invites no loss in the flow velocity, where the loss is caused by the conversion into potential energy, so that there is no need to vary the jetting area for both of nozzles 26a and 26b.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)

Claims (11)

  1. Machine à laver de type à tambour comprenant :
    (a) une carcasse (1) ;
    (b) une cuve à eau (2) pour stocker l'eau de lavage, ayant une ouverture (5) dirigée vers une face avant de la carcasse (1) ;
    (c) un tambour rotatif (4) ayant un axe de rotation (4a) qui s'incline vers l'arrière par rapport à l'horizontale, disposé en rotation dans la cuve à eau (2) et ayant une ouverture (6) au niveau d'une face avant du tambour rotatif (4) dirigée vers la face avant de la carcasse ;
    (d) un moteur (9) pour entraîner le tambour rotatif (4) ;
    (e) une trajectoire de circulation d'eau (20) pour faire circuler l'eau de lavage stockée dans la cuve à eau (2) jusqu'au tambour rotatif (4) ;
    (f) une pompe (21) pour transporter l'eau de lavage stockée dans la cuve à eau (2) vers la trajectoire de circulation d'eau (20) ;
    (g) une pluralité de buses (26a-26g) pour expulser l'eau de lavage, transmise à ces dernières par la pompe (21), dans le tambour rotatif (4) ; et
    (h) une trajectoire d'eau de buse (22) pour transporter l'eau de lavage de la trajectoire de circulation d'eau (20) vers la pluralité de buses (26a-26g), caractérisée en ce que :
    la pluralité de buses (26a-26g) sont disposées autour de l'axe de rotation (4a) en tant que centre, observé depuis le côté d'ouverture du tambour rotatif (4), à des intervalles angulaires approximativement égaux, les unes des autres ;
    dans laquelle la trajectoire d'eau de buse (22) est formée autour d'une face avant de la cuve à eau (2), et
    l'eau de lavage est expulsée sur le linge dans le tambour rotatif (4) à partir de la pluralité de buses (26a-26g) lorsque ledit moteur (9) fait tourner le tambour rotatif (4) vers l'avant ou vers l'arrière, et une action de levée et de chute du linge logé dans le tambour rotatif (4) se produit.
  2. Machine à laver de type à tambour selon la revendication 1, dans laquelle la trajectoire d'eau de buse (22) est généralement disposée à l'extérieur d'un bord (23a) de l'ouverture (6), et ladite trajectoire d'eau de buse (22) est formée de manière sensiblement annulaire avec deux parties d'extrémité (22a).
  3. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) est disposée à n'importe quel endroit différent d'un endroit situé juste sous l'axe de rotation (4a) du tambour (4).
  4. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) est disposée de sorte que les buses (26a-26g) expulsent l'eau de lavage dans n'importe quelle direction différente d'une direction perpendiculaire par rapport à l'axe de rotation (4a) du tambour rotatif (4).
  5. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) sont disposées approximativement à intervalles égaux, les unes des autres, dans une section supérieure ou une section inférieure de la cuve à eau (2) au niveau d'une circonférence avant de la cuve (2).
  6. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) expulsent une quantité approximativement identique d'eau de lavage les unes par rapport aux autres.
  7. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle chacune des buses (26a-26g) disposées sur une section supérieure de la circonférence avant de la cuve à eau (2) a une plus grande surface d'ouverture que chacune des buses disposées sur une section inférieure de la circonférence avant de la cuve à eau (2).
  8. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) a un trou de buse à travers lequel l'eau de lavage est expulsée, et le trou de buse est progressivement rétréci de sorte qu'un diamètre du trou de buse est supérieur au niveau d'un côté de sortie de l'eau de lavage qu'un diamètre du trou de buse au niveau d'un côté d'entrée de l'eau de lavage.
  9. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) a un trou de buse à travers lequel l'eau de lavage est expulsée et une partie plate qui est prévue avec le trou de buse, et la partie plate augmente vers un côté d'entrée de l'eau de lavage.
  10. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la pluralité de buses (26a-26g) a un trou de buse à travers lequel l'eau de lavage est expulsée, et le trou de buse est prévu avec une nervure cylindrique d'un côté d'entrée de l'eau de lavage.
  11. Machine à laver de type à tambour selon l'une quelconque des revendications 1 ou 2, dans laquelle la trajectoire d'eau de buse est prévue avec un réflecteur et un guide pour guider l'eau de lavage expulsée par la pluralité de buses (26a-26g) dans le tambour rotatif, le réflecteur a une face de frappe pour frapper l'eau de lavage expulsée par la pluralité de buses (26a-26g) et une face de guidage pour guider l'eau de lavage frappée contre la face de frappe dans le tambour rotatif (4).
EP10196551.5A 2010-01-08 2010-12-22 Machine à laver Active EP2343409B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP13167999.5A EP2634303B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP13168001.9A EP2631349B1 (fr) 2010-01-08 2010-12-22 Machine à laver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010002531A JP5493884B2 (ja) 2010-01-08 2010-01-08 洗濯機
JP2010125594A JP5671687B2 (ja) 2010-06-01 2010-06-01 ドラム式洗濯機

Related Child Applications (4)

Application Number Title Priority Date Filing Date
EP13167999.5A Division EP2634303B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP13167999.5A Division-Into EP2634303B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP13168001.9A Division EP2631349B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP13168001.9A Division-Into EP2631349B1 (fr) 2010-01-08 2010-12-22 Machine à laver

Publications (2)

Publication Number Publication Date
EP2343409A1 EP2343409A1 (fr) 2011-07-13
EP2343409B1 true EP2343409B1 (fr) 2014-02-12

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EP13167999.5A Active EP2634303B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP10196551.5A Active EP2343409B1 (fr) 2010-01-08 2010-12-22 Machine à laver
EP13168001.9A Active EP2631349B1 (fr) 2010-01-08 2010-12-22 Machine à laver

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Application Number Title Priority Date Filing Date
EP13167999.5A Active EP2634303B1 (fr) 2010-01-08 2010-12-22 Machine à laver

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP13168001.9A Active EP2631349B1 (fr) 2010-01-08 2010-12-22 Machine à laver

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EP (3) EP2634303B1 (fr)
CN (5) CN102121186B (fr)

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JP6076862B2 (ja) * 2013-08-29 2017-02-08 日立アプライアンス株式会社 ドラム式洗濯機
JP6311125B2 (ja) * 2014-11-26 2018-04-18 パナソニックＩｐマネジメント株式会社 洗濯機
EP3564425B1 (fr) 2016-12-28 2021-10-27 LG Electronics Inc. Machine à laver
KR102523465B1 (ko) * 2017-11-09 2023-04-18 엘지전자 주식회사 의류처리장치
EP3564427A4 (fr) * 2016-12-28 2020-06-03 LG Electronics Inc. -1- Machine à laver
KR102573125B1 (ko) 2017-12-28 2023-08-30 엘지전자 주식회사 세탁기
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WO2019201118A1 (fr) * 2018-04-16 2019-10-24 青岛海尔滚筒洗衣机有限公司 Machine à laver à chargement frontal et son système de pulvérisation
CN110387713A (zh) * 2018-04-16 2019-10-29 青岛海尔滚筒洗衣机有限公司 滚筒洗衣机及其喷淋系统
CN110387707B (zh) * 2018-04-16 2021-12-03 青岛海尔洗涤电器有限公司 滚筒洗衣机及其门体和喷淋系统
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Also Published As

Publication number Publication date
CN102212948B (zh) 2013-01-16
EP2631349A1 (fr) 2013-08-28
CN102212948A (zh) 2011-10-12
CN103088606A (zh) 2013-05-08
CN103088603A (zh) 2013-05-08
CN103088603B (zh) 2014-12-24
CN102121186B (zh) 2013-02-06
CN103088606B (zh) 2015-02-18
EP2634303B1 (fr) 2017-12-13
EP2631349B1 (fr) 2017-04-26
CN103088604A (zh) 2013-05-08
CN103088604B (zh) 2015-08-12
EP2343409A1 (fr) 2011-07-13
CN102121186A (zh) 2011-07-13
EP2634303A1 (fr) 2013-09-04

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