EP2889414B1 - Dispositif de traitement de linge - Google Patents

Dispositif de traitement de linge Download PDF

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Publication number
EP2889414B1
EP2889414B1 EP13832701.0A EP13832701A EP2889414B1 EP 2889414 B1 EP2889414 B1 EP 2889414B1 EP 13832701 A EP13832701 A EP 13832701A EP 2889414 B1 EP2889414 B1 EP 2889414B1
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EP
European Patent Office
Prior art keywords
steam
water
steam generator
exemplary embodiment
wall
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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EP13832701.0A
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German (de)
English (en)
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EP2889414A4 (fr
EP2889414A1 (fr
Inventor
Yoshikatsu SONODA
Shinichiro Kobayashi
Tsuyoshi Fukuda
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Panasonic Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Publication of EP2889414A4 publication Critical patent/EP2889414A4/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 
    • D06F39/40—Steam generating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/04—Heating arrangements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00—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 and having further drying means, e.g. using hot air 
    • 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
    • D06F35/00—Washing machines, apparatus, or methods not otherwise provided for
    • D06F35/005—Methods for washing, rinsing or spin-drying
    • D06F35/007—Methods for washing, rinsing or spin-drying for spin-drying only
    • 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
    • D06F39/088—Liquid supply arrangements

Definitions

  • the present invention relates to a clothes treatment device which washes, spin-dries and/or dries clothing.
  • the washing machine described in patent literature 1 is configured such that steam is generated by a heater immersed in water and generated steam is efficiently supplied to a drum in which clothing is housed.
  • impurities scales contained in water are deposited in a steam flow passage from a water supply port to a discharge port in a chamber of a steam generator. Then, due to thermal contraction in the chamber, deposited impurities are peeled off so that peeled-off pieces of impurities are generated. At this point of time, there may be a case where peeled-off pieces having a size equal to or more than a discharge port diameter are generated.
  • KR 2010 0102491 A1 discloses a clothes dryer with a steam generator using a hot air heater comprises a drum, an intake duct, a hot air heater, and a steam generator.
  • the drum is rotatably mounted in a body.
  • the intake duct guides the air provided to the drum.
  • the hot air heater heats the air provided to the drum through the intake duct.
  • the steam generator generates the steam to be provided to the drum.
  • a clothes treatment device of the present invention includes: a housing tub for housing clothing; and a steam supply mechanism for supplying steam to the housing tub.
  • the steam supply mechanism includes: a water supply valve; and a steam generating part, wherein the steam generating part includes: a heater which heats a wall surface defining a chamber for generating steam; a water supply mechanism which injects water to the wall surface; an inlet port through which the water is injected into the chamber; and a discharge port through which the steam is discharged from the inside of the chamber.
  • the steam supply mechanism is also configured such that an uneven-shape is formed on a wall surface of a steam flow passage from the inlet port to the discharge port.
  • a clothes treatment device according to an exemplary embodiment of the present invention is described with reference to drawings.
  • the present invention is not limited by the exemplary embodiment.
  • the description is made by taking a washing machine as an example of a clothes treatment device.
  • terms indicating the directions used in the description made hereinafter such as “upward”, “downward”, “leftward” and “rightward” are used merely for the clarification of the description and do not limit the principle of the clothes treatment device in any way.
  • the principle of the clothes treatment device is also applicable to a device which has an ability of washing and drying clothing and a device which dries clothing.
  • FIG. 1 is a schematic longitudinal cross-sectional view illustrating a washing machine exemplified as a clothes treatment device according to a first exemplary embodiment of the present invention.
  • washing machine 100 of this exemplary embodiment includes at least: casing 110; and housing tub 200 for housing clothing in the inside of casing 110.
  • Housing tub 200 includes rotary drum 210 having peripheral wall 211 which surrounds axis of rotation RX and has an approximately circular cylindrical shape (including a circular cylindrical shape), and water tub 220 which houses rotary drum 210.
  • Casing 110 is constituted of: front wall 111 in which a put-in opening through which clothing is put into housing tub 200 is formed; rear wall 112 disposed on a side opposite to front wall 111; casing ceiling wall 113 which extends approximately horizontally (including horizontally); casing bottom wall 114 disposed on a side opposite to casing ceiling wall 113; a left wall and a right wall described later and the like.
  • rotary drum 210 and water tub 220 of housing tub 200 are opened toward front wall 111.
  • Washing machine 100 further includes door body 120 mounted on front wall 111 of casing 110.
  • Door body 120 is rotatable between a closed position where door body 120 closes the put-in opening formed in front wall 111 and an open position where door body 120 opens the put-in opening. Due to such a constitution, a user can put clothing into housing tub 200 through the put-in opening formed in front wall 111 after rotating door body 120 to the open position. Thereafter, the user moves door body 120 to the closed position, and the washing machine 100 washes the clothing already put into washing machine 100.
  • FIG. 1 shows a state where door body 120 is at the closed position.
  • Rotary drum 210 includes peripheral wall 211 and bottom wall 212, and is rotated about axis of rotation RX which extends between front wall 111 and rear wall 112 of casing 110. Clothing put into housing tub 200 moves in the inside of rotary drum 210 along with the rotation of rotary drum 210. Due to such an operation, clothing is subjected to various processing such as washing processing, rinsing processing and/or spin-drying processing. Bottom wall 212 of rotary drum 210 is disposed in a state where the bottom wall 212 faces door body 120 at the closed position.
  • Water tub 220 is constituted of at least bottom portion 221, and front portion 222.
  • Bottom portion 221 surrounds bottom wall 212 and a portion of peripheral wall 211 of rotary drum 210.
  • Front portion 222 is disposed between bottom portion 221 of water tub 220 and door body 120, and surrounds a remaining portion of peripheral wall 211 of rotary drum 210 which front portion 222 faces.
  • Housing tub 200 includes rotary shaft 230 mounted on bottom wall 212 of rotary drum 210, and extends toward rear wall 112 of casing 110 along axis of rotation RX. Accordingly, rotary shaft 230 is provided such that rotary shaft 230 penetrates bottom portion 221 of water tub 220 and projects into a space formed between water tub 220 and rear wall 112.
  • Washing machine 100 includes motor 231 mounted on a lower side of water tub 220, pulley 232 mounted on rotary shaft 230 exposed to the outside of water tub 220, and belt 233 which transmits power of motor 231 to pulley 232. Further, when motor 231 is operated, power of motor 231 is transmitted to rotary shaft 230 by way of belt 233 and pulley 232. As a result, rotary drum 210 rotates in the inside of water tub 220.
  • Washing machine 100 further includes packing structure 130 disposed between front portion 222 of water tub 220 and door body 120.
  • packing structure 130 is compressed by door body 120.
  • the watertight sealing structure is formed between door body 120 and front portion 222.
  • Washing machine 100 includes water supply port 140 connected to a faucet (not shown in the drawing), and distribution part 141 for distributing water introduced into washing machine 100 through water supply port 140.
  • Water supply port 140 is formed in a state where water supply port 140 projects upward from casing ceiling wall 113, and distribution part 141 is disposed between casing ceiling wall 113 and housing tub 200.
  • washing machine 100 includes a detergent housing part (not shown in the drawing) in which a detergent is housed, and steam supply mechanism 300 which injects steam to housing tub 200 (described later).
  • Distribution part 141 includes a plurality of water supply valves for selectively supplying water to housing tub 200, detergent housing part and steam supply mechanism 300 through water supply passages (not shown in the drawing). It is needless to say that known techniques applied to washing machines are applicable to the supply of water to housing tub 200 and the detergent housing part.
  • FIG. 2 and FIG. 3 the constitution of the steam supply mechanism of the washing machine according to the exemplary embodiment of the present invention is described using FIG. 2 and FIG. 3 with reference to FIG. 1 .
  • FIG. 2 is a schematic perspective view illustrating the washing machine according to the exemplary embodiment with a part shown in a see-through manner.
  • FIG. 3 is a schematic perspective view illustrating the steam supply mechanism housed in the casing of the washing machine according to the exemplary embodiment. Casing 110 is indicated by a dotted line in FIG. 2 and FIG. 3 , and housing tub 200 is not shown in FIG. 3 . An arrow in FIG. 3 schematically shows the water supply passages which connect the respective parts to each other.
  • steam supply mechanism 300 includes at least water supply valve 310 used as a part of distribution part 141, and water storage tank 320 disposed below housing tub 200.
  • Water supply valve 310 controls the supply of water to water storage tank 320. That is, when water supply valve 310 is opened, water is supplied to water storage tank 320 from water supply port 140. When water supply valve 310 is closed, the supply of water to water storage tank 320 is stopped.
  • Steam supply mechanism 300 further includes pump 330 mounted on water storage tank 320, and steam generating part 400 which receives water discharged from pump 330.
  • Pump 330 performs an operation to supply water to steam generating part 400 intermittently or continuously. During an intermittent water supply operation, pump 330 supplies a proper amount of water which is adjusted such that steam is generated instantaneously to steam generating part 400 described later.
  • water is continuously supplied to steam generating part 400 by pump 330, it is possible to wash away an impurity (scale) or the like contained in water used for steam generation from steam generating part 400.
  • steam supply mechanism 300 further includes steam communication tube 340 which extends downward from steam generating part 400.
  • front portion 222 of water tub 220 includes peripheral wall portion 223 which surrounds peripheral wall 211 of rotary drum 210, and annular portion 224 shown in FIG. 2 which forms the watertight sealing structure in cooperation with packing structure 130.
  • Steam communication tube 340 of steam supply mechanism 300 is connected to peripheral wall portion 223 of front portion 222. Due to such a constitution, steam generated in steam generating part 400 is supplied to housing tub 200 through steam communication tube 340. It is preferable that steam communication tube 340 be formed such that at least a portion of steam communication tube 340 is formed into a bellows shape, for example, so as to prevent vibrations generated by the rotation of housing tub 200 from being transmitted to steam generating part 400.
  • steam supply mechanism 300 of this exemplary embodiment it is possible to forcibly supply water to steam generator 420 disposed in the inside of steam generating part 400 from water storage tank 320 by pump 330. Accordingly, steam generator 420 can be disposed above water storage tank 320.
  • steam generator 420 can be disposed above water storage tank 320.
  • steam generator 420 is disposed above water storage tank 320 as shown in FIG. 2 , water can be supplied to steam generator 420 from water storage tank 320 by pump 330 without causing any problems.
  • steam generator 420 of steam generating part 400 is disposed above housing tub 200.
  • an impurity contained in water supplied to steam generator 420 adheres to or precipitates on a wall surface of chamber space 430 (also referred to as "chamber") which is defined by outer chamber wall 431, inner chamber wall 432 and upper surface 429 of body portion 423, and lower surface 434 of lid portion 424 which constitute steam generator 420 shown in FIG. 8 described later at the time of evaporating water.
  • the impurity is deposited on the wall surface which defines chamber space 430. In this case, the heat transfer between the wall surface of chamber space 430 and supplied water is not performed properly due to the impurity and hence, water supplied to steam generator 420 is difficult to be evaporated.
  • water storage tank 320 is disposed in a left lower space of casing 110, and steam generator 420 is disposed in a right upper space of casing 110. That is, steam generator 420 and water storage tank 320 are respectively disposed at approximately symmetrical positions (including completely symmetrical positions) with respect to the center axis of housing tub 200 (axis of rotation RX).
  • a detergent housing part (not shown in the drawing) which houses a detergent is disposed on either one of a left side and a right side of an upper front portion of casing 110. Accordingly, a space defined by housing tub 200 having approximately circular cylindrical shape (including a circular cylindrical shape) excluding a position occupied by the detergent housing part and casing 110 can be effectively used as a space for disposing water storage tank 320 and steam generator 420 respectively.
  • water storage tank 320 is disposed on a rear side of the left lower portion of casing 110.
  • a space defined between an inner surface of casing 110 having an approximately rectangular box shape (including a rectangular box shape) and an outer peripheral surface of housing tub 200 can be effectively used for disposing water storage tank 320 and steam generator 420.
  • a design size of water storage tank 320 and a design size of steam generator 420 can be set to values which allow housing of water storage tank 320 and steam generator 420 having maximally large sizes in the space defined in washing machine 100.
  • water storage tank 320 may be disposed at a position approximately symmetrical with the detergent housing part with respect to the center axis of housing tub 200 (axis of rotation RX), and steam generator 420 may be disposed at a position approximately symmetrical with water storage tank 320 with respect to horizontal plane HP including axis of rotation RX of housing tub 200.
  • the space formed in the inside of casing 110 can be effectively used in the same manner as described above.
  • water storage tank 320 may be disposed below the detergent housing part, and steam generator 420 may be disposed above water storage tank 320.
  • steam generator 420 may be disposed at a position approximately symmetrical with water storage tank 320 with respect to a vertical plane including axis of rotation RX of housing tub 200.
  • water storage tank 320 and steam generator 420 may be disposed at approximately symmetrical positions with respect to axis of rotation RX of housing tub 200 or with respect to horizontal plane HP including axis of rotation RX.
  • water storage tank 320 and steam generator 420 are disposed at approximately symmetrical positions with respect to a vertical plane passing through the approximately center (including the center) in the longitudinal direction of casing 110. Due to such an arrangement, a space defined between the inner surface of casing 110 and the outer peripheral surface of housing tub 200 can be effectively used for disposing water storage tank 320 and steam generator 420.
  • FIG. 4A and FIG. 4B are schematic perspective views showing the steam generating part of the steam supply mechanism according to the exemplary embodiment.
  • steam generating part 400 includes casing 410 having an approximately rectangular box shape (including rectangular box shape), and steam generator 420 housed in casing 410.
  • Casing 410 includes: vessel portion 411 which has bottom wall portion 414 and houses steam generator 420; and lid portion 412 constituted of upper wall 415 covering vessel portion 411 and lid portion peripheral wall 416 on which projecting member 417 is formed.
  • Steam generator 420 is connected to pump 330 by way of connection tube 421 and a tube (not shown in the drawing), and is connected to steam communication tube 340 by way of discharge tube 422. Opening portion 413 is formed on bottom wall portion 414 of vessel portion 411. Connection tube 421 and discharge tube 422 are disposed in a downwardly projecting manner through opening portion 413.
  • FIG. 5A and FIG. 5B the mounting structure for mounting steam generating part 400 of steam supply mechanism 300 on casing 110 of washing machine 100 is described using FIG. 5A and FIG. 5B with reference to FIG. 3 and FIG. 4A .
  • FIG. 5A and FIG. 5B are schematic perspective views of the mounting structure for connecting the lid portion and the casing of the steam generating part according to the exemplary embodiment to each other.
  • casing 110 is constituted of at least: front wall 111; rear wall 112; right wall 115 formed in a raised manner between front wall 111 and rear wall 112; and left wall 116 formed in a raised manner between front wall 111 and rear wall 112 on a side opposite to right wall 115.
  • Casing 110 further includes first reinforcing frame 117 disposed along an upper edge of right wall 115, and second reinforcing frame 118 disposed along an upper edge of front wall 111.
  • lid portion 412 which forms a portion of steam generating part 400 includes: upper wall 415 having an approximately rectangular shape (including a rectangular shape); lid portion peripheral walls 416 which project downward (toward a casing 410 side) from edge portions of upper wall 415; and projecting member 417 which projects frontward (toward a front wall 111 side of casing 110) from lid portion peripheral wall 416.
  • first reinforcing frame 117 mounted on casing 110 of washing machine 100 and upper wall 415 of lid portion 412 of steam generating part 400 are connected to each other by first mounting member 151 shown at right side of FIG. 5B .
  • second reinforcing frame 118 and projecting member 417 are connected to each other by second mounting member 152 shown at left side of FIG. 5A .
  • lid portion 412 of steam generating part 400 and casing ceiling wall 113 of casing 110 are mounted in a spaced-apart manner from each other by way of first mounting member 151 and second mounting member 152 which are mounted on lid portion 412 in an upwardly projecting manner.
  • first mounting member 151 and second mounting member 152 which are mounted on lid portion 412 in an upwardly projecting manner.
  • FIG. 6A and FIG. 6B are schematic perspective views of a steam generator in the steam generating part according to the exemplary embodiment.
  • steam generator 420 is constituted of: body portion 423 having an approximately rectangular shape (including a rectangular shape); lid portion 424 disposed on body portion 423; and a linear heater 425, such as a sheathed heater, disposed in the inside of body portion 423 through peripheral surface 428 of body portion 423.
  • body portion 423 and lid portion 424 are formed using aluminum, for example. Due to such a constitution, body portion 423 and lid portion 424 are efficiently and properly heated by heater 425.
  • thermister 426 is further mounted on body portion lower surface 427 of body portion 423 of steam generator 420.
  • connection tube 421 and discharge tube 422 are also mounted on body portion 423 which constitutes steam generator 420.
  • Heater 425 is controlled based on temperature information obtained by thermister 426. Due to such a control, the temperature of body portion 423 and the temperature of lid portion 424 are held at approximately fixed temperatures (including fixed temperatures). A thermostat which controls the turning on and off of electricity power to heater 425 at a predetermined temperature may be used in place of thermister 426. In this case, the substantially same effect can be obtained.
  • body portion 423 which constitutes steam generator 420 is described using FIG. 6B and FIG. 7 .
  • FIG. 7 is a schematic perspective view illustrating the body portion of the steam generator according to this exemplary embodiment.
  • body portion 423 includes body portion lower surface 427, peripheral surface 428, and upper surface 429.
  • Thermister 426, connection tube 421 and discharge tube 422 are mounted on body portion lower surface 427.
  • Body portion lower surface 427 and heater 425 are disposed on peripheral surface 428.
  • body portion 423 is formed on upper surface 429 in a raised manner toward lid portion 424 which constitutes one side of steam generator 420 thus forming chamber space 430 having an approximately triangular shape (including a triangular shape), for example.
  • Chamber space 430 is formed in such a manner that chamber space 430 is defined by outer chamber wall 431 and inner chamber wall 432 having an approximately J shape (including a J shape), for example, which defines a steam flow passage in the inside of chamber space 430.
  • an uneven-shape is formed on a wall surface which surrounds chamber space 430 of body portion 423.
  • an uneven-shape formed of square pyramids 440 for example, is continuously formed toward discharge port 438 from inlet port 437 of steam generator 420.
  • an uneven-shape formed of triangular columns 441 for example, is formed on outer peripheral side wall 443 of chamber space 430 of body portion 423. Due to such a constitution, as described later, impurities deposited in chamber space 430 of steam generator 420 at the time of evaporation of water can be made small and divided into small pieces. Due to the above-mentioned constitution having an uneven-shape, not only a mold can be formed easily but also the mold can be easily manufactured.
  • the number of uneven-shapes formed of triangular columns 441 and square pyramids 440 is large in an area closed to inlet port 437 compared to an area close to discharge port 438 in the steam flow passage.
  • the uneven-shape is formed over whole bottom surface 442 and the whole outer peripheral side wall 443.
  • the number of the uneven-shapes is decreased or an uneven-shape is not locally formed.
  • FIG. 8 is a schematic developed perspective view illustrating the steam generator according to the exemplary embodiment.
  • FIG. 9 is a schematic perspective view illustrating the lid portion of the steam generator according to the exemplary embodiment.
  • FIG. 9 in the same manner as the bottom surface 442 which surrounds chamber space 430 of body portion 423 shown in FIG.8 , an uneven-shape is formed on lower surface 434 of lid portion 424.
  • square pyramids 440 are formed on lower surface 434.
  • square pyramids 440 are formed on lower surface 434 of lid portion 424 in a state where square pyramids 440 are disposed continually, for example.
  • steam generator 420 includes packing ring 433 made of a heat-resistance rubber or the like, for example, mounted on body portion 423 in a state where packing ring 433 surrounds outer chamber wall 431.
  • lid portion 424 includes lower surface 434 which faces body portion 423, and outer shield wall 435 which has the substantially same shape (including the same shape) as that of outer chamber wall 431 of body portion 423.
  • lid portion 424 By pushing lid portion 424 to body portion 423, outer shield wall 435 of lid portion 424 compresses packing ring 433. As a result, air-tightness of chamber space 430 of steam generator 420 is maintained.
  • Inlet port 437 is formed in body portion 423. Inlet port 437 is formed so as to allow water supplied through connection tube 421 connected to body portion lower surface 427 to flow into the inside of chamber space 430. Inlet port 437 is formed at the approximately center (including the center) of chamber space 430, and the periphery of inlet port 437 is surrounded by inner chamber wall 432.
  • Steam generator 420 of this exemplary embodiment is constituted as described above.
  • steam generator 420 when a predetermined amount of water is supplied to steam generator 420 from water storage tank 320 by pump 330, water is injected upward (toward a lid portion 424 side) through connection tube 421 and inlet port 437. Water injected into chamber space 430 of steam generator 420 impinges on inner chamber wall 432, upper surface 429 of body portion 423 surrounded by inner chamber wall 432 and/or lower surface 434 of lid portion 424 positioned above inlet port 437. At this point of time, steam generator 420 is heated by heater 425 (for example, approximately 200°C) thus having high thermal energy.
  • heater 425 for example, approximately 200°C
  • the water supply operation is performed intermittently using pump 330 of steam supply mechanism 300 so that a proper amount of water is supplied into the inside of chamber space 430 of steam generator 420 (for example, approximately 2cc/time). Accordingly, water injected upward from inlet port 437 of steam generator 420 is instantaneously evaporated by thermal energy which steam generator 420 possesses.
  • an inner pressure of chamber space 430 is sharply increased. Accordingly, an impurity contained in water supplied to steam generator 420 adheres to or precipitates on the wall surface which constitutes chamber space 430 when water evaporates, and then, the impurity is deposited on the wall surface. In this case, when a surface which constitutes the steam flow passage from inlet port 437 to discharge port 438 is flat, large impurities are liable to be formed. When the impurities are large, the impurities are difficult to be discharged from discharge port 438 and hence, there is a possibility that discharge port 438 is clogged.
  • an uneven-shape is formed on the surface of the steam flow passage from inlet port 437 to discharge port 438.
  • triangular columns 441 and square pyramids 440 are formed.
  • adhered or precipitated impurities are deposited in such a manner that impurities are deposited on recessed portions of the uneven-shape formed on the surface of the steam flow passage particularly.
  • recessed portions which are formed between square pyramids 440 and triangular columns 441 formed in the steam flow passage exist in plane of the steam flow passage, and sizes of the recessed portions are small (for example approximately 1mm). Accordingly, impurities are not adhered or deposited on the recessed portions at specific one portion, for example, and is adhered or deposited in a dispersed manner. As a result, impurities having a relatively small size are adhered or deposited on the large number of recessed portions in a dispersed manner.
  • pyramid 440 and triangular column 441 have an acute-angled portion and hence, the recessed portion is also formed into an acute-angled shape. Accordingly, an impurity adhered to or deposited on the recessed portion is brittle and is liable to collapse and hence, an impurity having a relatively small size is adhered or deposited.
  • impurities are made small into peeled-off pieces of a size equal to or lower than a diameter of discharge port 438 due to square pyramids 440 and triangular pyramids 441. Accordingly, the impurities receive an action of pressure at the time of evaporation of water and hence, impurities easily flow in a flow passage. As a result, it is possible to easily discharge impurities to the outside from chamber space 430 through the discharge port.
  • the number of uneven-shapes formed in the steam flow passage on an upstream side of chamber space 430 close to inlet port 437 is set larger than the number of uneven-shapes formed in the steam flow passage on a downstream side of chamber space 430 close to discharge port 438.
  • the uneven-shapes are formed substantially on whole bottom surface 442 and whole outer peripheral side wall 443.
  • the number of the uneven-shapes is decreased or the uneven-shape is not locally formed.
  • FIG. 10 is a schematic plan view illustrating the body portion of the steam generator according to the exemplary embodiment.
  • heater 425 is disposed so as to extend along an approximately U-shaped (including a U shape) passage formed in the inside of body portion 423. Due to such an arrangement, heater 425 surrounds inlet port 437 to which connection tube 421 is mounted. Accordingly, the temperature of inner chamber wall 432 and the temperature of a region surrounded by inner chamber wall 432 become the highest temperature in the inside of chamber space 430 due to heating by heater 425. As a result, water injected into the inside of chamber space 430 through inlet port 437 is instantaneously evaporated.
  • Inner chamber wall 432 is disposed in the inside of chamber space 430 defined by outer chamber wall 431 in a state where inner chamber wall 432 extends in an approximately J-shape (including a J-shape). That is, a spiral-shaped flow passage is formed in chamber space 430 by inner chamber wall 432.
  • Discharge port 438 is formed in body portion 423 at a position in the vicinity of a terminal end of the flow passage through which water or steam passes. Due to such a constitution, steam generated in the space surrounded by inner chamber wall 432 moves toward discharge port 438 along with the increase of an inner pressure of chamber space 430. Then, steam which arrives at discharge port 438 is discharged downward in the vertical direction through discharge tube 422 mounted on discharge port 438.
  • Heater 425 is disposed such that heater 425 extends in an approximately U-shaped manner (including a U shaped manner) along an outside passage of the spiral-shaped flow passage. Due to such a constitution, steam generated in the space surrounded by inner chamber wall 432 moves toward discharge tube 422 while being heated. Accordingly, high-temperature steam is discharged from discharge tube 422 of steam generator 420.
  • steam generator 420 of this exemplary embodiment can inject water to a heated wall surface and can instantaneously evaporate water. Accordingly, compared to a conventional case where steam is generated by a heater immersed in water, power consumption necessary for generating the same amount of steam in this exemplary embodiment can be made small. As a result, it is possible to realize a clothes treatment device with low power consumption.
  • FIG. 11 the constitution and the manner of operation of the water supply mechanism of the washing machine of the exemplary embodiment of the present invention are described using FIG. 11 .
  • FIG. 11 is a schematic view illustrating the water supply mechanism of the steam supply mechanism according to the exemplary embodiment.
  • water supply mechanism 500 which injects water to chamber space 430 of steam generator 420 includes water supply valve 310, water storage tank 320, pump 330, connection tube 421, and water level sensor 321 for measuring a water level in water storage tank 320 all of which are described previously.
  • Water supply valve 310 performs the supply of water to water storage tank 320 or the cutting off of the supply of water to water storage tank 320 in accordance with a water level detected by water level sensor 321.
  • Water supply valve 310 may be controlled in accordance with an operation time and/or an operation pattern (an intermittent water supply operation and/or a continuous water supply operation) of pump 330. For example, an amount of water supplied from water supply valve 310 may be adjusted such that water storage tank 320 becomes empty when an operation of pump 330 is finished. Due to such a constitution, even when an outside air temperature becomes low, water in water storage tank 320 is difficult to be frozen. As a result, the reliability of washing machine 100 can be further enhanced.
  • Pump 330 supplies water stored in the inside of water storage tank 320 to chamber space 430 of steam generator 420 through connection tube 421.
  • a supply amount, a supply time, a supply interval and the like are adjusted such that water injected into the inside of chamber space 430 is instantaneously evaporated.
  • Discharge tube 422 of steam generator 420 is connected to steam communication tube 340. Due to such a constitution, steam generated in the inside of chamber space 430 due to the intermittent water supply operation by pump 330 and water which flows into the inside of chamber space 430 due to the continuous water supply operation of pump 330 can be made to flow into housing tub 200 through discharge tube 422 and steam communication tube 340.
  • the water supply mechanism of the steam supply mechanism of washing machine 100 of this exemplary embodiment is configured as described above.
  • FIG. 12 the operation of supplying steam and water to the housing tub of the washing machine of the exemplary embodiment of the present invention is described using FIG. 12 with reference to FIG. 1 and FIG. 11 .
  • FIG. 12 is a schematic back view illustrating a front portion of the housing tub of the washing machine according to the exemplary embodiment.
  • annular portion 224 of front portion 222 of water tub 220 includes: inner surface 225 which faces rotary drum 210; and outer surface 226 which faces front wall 111 of casing 110.
  • FIG. 12 mainly shows inner surface 225 of annular portion 224 formed on front portion 222 of water tub 220.
  • the above-mentioned steam supply mechanism 300 further includes: branched tube 351 mounted on inner surface 225; nozzle 352 disposed above branched tube 351; and steam tube 353 which connects branched tube 351 and nozzle 352 to each other.
  • Steam communication tube 340 is connected to branched tube 351 through peripheral wall portion 223 of water tub 220.
  • steam generated in the inside of chamber space 430 of steam generator 420 flows into steam communication tube 340 through discharge tube 422 along with the increase of a pressure in the inside of chamber space 430. Thereafter, the steam flows into branched tube 351 from steam communication tube 340.
  • the steam which arrives at branched tube 351 has a high temperature and hence, the steam is guided to steam tube 353 and flows into nozzle 352 disposed above branched tube 351. Lastly, the steam is injected downward into the inside of rotary drum 210 of housing tub 200 from nozzle 352.
  • steam generated in the inside of chamber space 430 is guided to nozzle 352 through discharge tube 422, steam communication tube 340, branched tube 351 and steam tube 353.
  • pump 330 which performs intermittent water supply operation injects a proper amount of water into the inside of chamber space 430 heated by heater 425 and has a high temperature and hence, water is instantaneously evaporated.
  • an inner pressure of chamber space 430 of steam generator 420 is sharply increased due to the evaporation of the water. Accordingly, generated steam is injected from nozzle 352 at a high pressure.
  • steam is injected such that steam crosses an inner space of housing tub 200 in the vertical direction.
  • Branched tube 351 which introduces steam into steam tube 353 from steam communication tube 340 includes: main tube 354 connected to steam communication tube 340; upper sub tube 355 bent upward from main tube 354; and lower sub tube 356 bent downward from main tube 354. Steam or water flows into main tube 354 through steam communication tube 340. Upper sub tube 355 is connected to steam tube 353, and forms an upwardly extending passage through which steam moves toward nozzle 352.
  • lower sub tube 356 forms a downwardly extending passage.
  • the continuous water supply operation is performed by pump 330, mainly water flows into branched tube 351 through steam communication tube 340. Then, water which flows into branched tube 351 flows downward through lower sub tube 356 due to the action of gravity.
  • main tube 354 and upper sub tube 355 of branched tube 351 are connected to each other at an included angle of ⁇ 1 which is an obtuse angle, while main tube 354 and lower sub tube 356 are connected to each other at an included angle of ⁇ 2 which is an acute angle. Since the included angle ⁇ 2 is an acute angle, a flow loss from main tube 354 to lower sub tube 356 is relatively large. Accordingly, steam which flows into the inside of main tube 354 hardly flows into lower sub tube 356, and the steam mainly flows into upper sub tube 355.
  • upper sub tube 355 forms the upwardly extending flow passage and hence, due to the action of gravity, water which flows into main tube 354 hardly flows into upper sub tube 355 and the water mainly flows into lower sub tube 356. As a result, the flow passage for steam and the flow passage for water can be properly separated from each other by branched tube 351.
  • FIG. 13 the intermittent operation of the pump which supplies water to the steam generating part of the washing machine of the exemplary embodiment of the present invention is described using FIG. 13 with reference to FIG. 8 and FIG. 11 .
  • FIG. 13 is an explanatory view schematically showing the relationship between an intermittent operation by the pump of the water supply mechanism and a temperature in the inside of the chamber space according to the exemplary embodiment.
  • a length of the ON period and a length of the OFF period in Fig. 13 are relative values, and these lengths may be changed corresponding to a capacity of chamber space 340, an amount of heating by the heater, and a required amount of steam.
  • pump 330 supplies a predetermined amount of water to chamber space 430 in the ON period.
  • the supplied water is evaporated so as to generate steam.
  • a temperature in chamber space 430 is temporarily lowered.
  • heater 425 can sufficiently increase a temperature in chamber space 430 during the OFF period. As a result, it is possible to continue the supply of high-pressure steam to housing tub 200 during a period where pump 330 performs the intermittent operation.
  • a temperature in chamber space 430 is sufficiently increased during the OFF period. Then, in the ON period, a proper amount of water which can be evaporated instantaneously by thermal energy which steam generator 420 including chamber space 430 possesses (for example, approximately 2cc/time) is supplied to chamber space 430. Accordingly, it is possible to favorably continue the supply of high-pressure steam to housing tub 200.
  • FIG. 14 is an explanatory view schematically showing a temperature change in water supplied to the water tub of the washing machine according to the exemplary embodiment.
  • hot water heater 160 for heating water supplied to the inside of water tub 220 is disposed in a lower portion of water tub 220.
  • a predetermined amount of water is supplied to water tub 220.
  • the temperature of water contained in clothing in the inside of water tub 220 takes an approximately fixed value (including a fixed value).
  • water in the inside of water tub 220 is heated using hot water heater 160.
  • hot water heater 160 generates a large amount of heat value and hence, the temperature of water contained in clothing in the inside of water tub 220 is sharply increased.
  • the temperature of water reaches a predetermined temperature, heating of water in the inside of water tub 220 is stopped.
  • washing step is carried out by introducing steam into the inside of housing tub 200 through steam supply mechanism 300.
  • a dotted line after heating is stopped shown in FIG. 14 indicates a change in the temperature of water contained in clothing when the heating by hot water heater 160 is stopped and steam is not supplied.
  • a solid line after heating is stopped indicates a change in the temperature of water contained in clothing when heating by hot water heater 160 is stopped and steam is supplied to housing tub 200.
  • high-temperature steam is directly supplied to housing tub 200 in a state where the steam is injected to clothing. Accordingly, lowering of the temperature of water contained in clothing in the inside of water tub 220 is alleviated (suppressed) by high-temperature steam. Further, power consumption of heater 425 used in steam generator 420 is smaller than that of hot water heater 160 mounted on water tub 220. As a result, heat retention by the supply of high-temperature steam can be realized with low power consumption compared to the case where heat retention of water in the inside of water tub 220 is performed using hot water heater 160. Accordingly, in washing step, it is preferable that high-temperature steam be supplied to the housing tub by performing intermittent water supply operation using pump 330 after hot water heater 160 is stopped.
  • rotary drum 210 is rotated at a high speed by motor 231. As shown in FIG. 1 , a large number of small holes 219 are formed in peripheral wall 211 of rotary drum 210.
  • steam is supplied to the inside of rotary drum 210 in spin-drying step. Due to such supply of steam, hydrogen bonding of fibers can be released by steam. As a result, the generation of wrinkles in clothing can be decreased.
  • timing at which steam generated by the steam generator is supplied to the housing tub is described using three patterns as an example with reference to FIG. 15A to FIG. 15C .
  • FIG. 15A to FIG. 15C are schematic timing charts expressing timing at which steam is supplied during spin-drying step according to the exemplary embodiment.
  • steam may be supplied in synchronism with the starting of spin-drying step by steam supply mechanism 300.
  • the temperature of clothing is elevated at an initial stage of spin-drying step and hence, clothing can be efficiently made wet at a high temperature.
  • steam may be supplied for some time, for example, after a lapse of a predetermined time (T1) or by a predetermined time (T2) from the starting of spin-drying step by steam supply mechanism 300.
  • T1 a predetermined time
  • T2 a predetermined time
  • T2 a predetermined time from the starting of spin-drying step
  • the period during which steam is supplied by steam supply mechanism 300 may be the whole period from starting to the finishing of spin-drying step.
  • timing at which steam is supplied to the housing tub is not limited to the above-mentioned three patterns.
  • step of cooling the steam generator of the exemplary embodiment of the present invention is described using FIG. 8 and FIG. 11 .
  • FIG. 16 a control of the door body of the exemplary embodiment of the present invention is described using FIG. 16 with reference to FIG. 1 and FIG. 6B .
  • FIG. 16 is a block diagram schematically showing the control of the door body based on the temperature of the steam generator according to the exemplary embodiment.
  • washing machine 100 of this exemplary embodiment includes: locking mechanism 121 which locks door body 120 at a closed position; and control part 122 for controlling locking using locking mechanism 121 and releasing of such locking. It is needless to say that the known structures of washing machines are utilized as mechanical and electric mechanisms used in locking mechanism 121.
  • steam generator 420 includes thermister 426.
  • thermister 426 detects the temperature of body portion 423 of steam generator 420, and outputs a signal corresponding to a detected temperature to control part 122.
  • control part 122 maintains locking of door body 120 using locking mechanism 121 until a signal outputted from thermister 426 becomes a signal corresponding to a predetermined temperature or below. Due to such an operation, until the temperature of steam generator 420 becomes a predetermined temperature or below, the inner space of housing tub 200 is isolated from the outside. As a result, it is possible to prevent a user from being exposed to high-temperature steam in advance, thus realizing safe and highly reliable washing machine 100.
  • the uneven-shapes are not limited to triangular columns and square pyramids and, for example, may be formed into projecting shapes such as cones, triangular pyramids or polygonal pyramids.
  • Such uneven-shapes can acquire the substantially same advantageous effect.
  • the uneven-shape is formed by disposing triangular columns, square pyramids or the like having the same shape.
  • the present invention is not limited to such an example.
  • the uneven-shape may be formed by arbitrarily disposing triangular columns, square pyramids, cones, triangular pyramids, polygonal pyramids or like having the different shapes. Such uneven-shapes can acquire the substantially same advantageous effect.
  • FIG. 17 is a schematic developed perspective view illustrating a steam generator used in a washing machine exemplified as a clothes treatment device according to a second exemplary embodiment of the present invention.
  • steam generator 420A of this exemplary embodiment differs from steam generator 420 of the first exemplary embodiment with respect to a point that heater 425A is provided to lid member 424A of steam generator 420A.
  • Other constitutions and the manner of operation are substantially equal to the corresponding constitutions and the manner of operation of first exemplary embodiment and hence, the detailed description of other constitutions and the manner of operation is omitted.
  • Constitutional elements identical with constitutional elements of steam generator 420 of first exemplary embodiment are described by giving the same symbols to the constitutional elements.
  • steam generator 420A of the clothes treatment device of this exemplary embodiment is at least constituted of: body portion 423A; lid portion 424A; and packing ring 433 sandwiched between body portion 423A and lid portion 424A.
  • Heater 425A is mounted on lid portion 424A which constitutes steam generator 420A.
  • FIG. 18 is a schematic perspective view illustrating the steam generator according to the exemplary embodiment.
  • lid portion 424A of steam generator 420A includes inner shield wall 436 surrounded by outer shield wall 435.
  • Inner shield wall 436 of lid portion 424A is formed with the approximately same shape (including the same shape) as inner chamber wall 432 of body portion 423A. Accordingly, inner shield wall 436 of lid portion 424A overlaps with inner chamber wall 432 of body portion 423A. As a result, a spiral flow passage is formed in chamber space 430 of steam generator 420A.
  • heater 425A is mounted in lid portion 424A such that heater 425A surrounds facing region 439.
  • Steam generator 420A of this exemplary embodiment is constituted as described above.
  • Steam generator 420A of this exemplary embodiment is operated as follows.
  • a water supply operation is intermittently performed by pump 330 of steam generating mechanism 300 so that a flow speed of supplied water is adjusted whereby supplied water is instantaneously evaporated.
  • chamber space 430 Due to the instantaneous evaporation of water, an internal pressure in chamber space 430 is sharply elevated. Accordingly, impurities contained in water supplied to steam generator 420A are deposited by adhesion or precipitation on a wall surface which forms chamber space 430 at the time of evaporation.
  • the clothes treatment device of the present invention includes: the housing tub for housing clothing; and the steam supply mechanism for supplying steam to the housing tub.
  • the steam supply mechanism includes: the water supply valve; and a steam generating part.
  • the steam generating part includes the heater which heats the wall surface defining the chamber for generating steam; the water supply mechanism which injects water to the wall surface; the inlet port through which the water is injected into the chamber; and the discharge port through which the steam is discharged from the inside of the chamber.
  • the steam supply mechanism may be also configured such that the uneven-shape is formed on the wall surface of a steam flow passage from the inlet port to the discharge port.
  • the steam flow passage may have the structure where the uneven-shape is continuously disposed.
  • the number of the uneven-shapes on a side close to the inlet port is larger than the number of the uneven-shapes on a side close to the discharge port side.
  • the uneven-shape may be either a triangular pyramid or a pyramid. Due to such a constitution, impurities can be made small in size so that the impurities can be easily discharged to the outside.
  • the present invention is preferably applicable to the device which processes clothing using steam.

Landscapes

  • 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)

Claims (3)

  1. Dispositif de traitement de vêtements, comprenant :
    une cuve de logement (200) pour loger des vêtements ; et
    un mécanisme d'alimentation en vapeur (300) pour fournir de la vapeur à la cuve de logement (200), dans lequel
    le mécanisme d'alimentation en vapeur (300) inclut une vanne d'alimentation en eau (310), et une partie de génération de vapeur (400),
    la partie de génération de vapeur (400) inclut un élément chauffant (425) qui chauffe une surface de paroi définissant une chambre (430) pour générer de la vapeur, un mécanisme d'alimentation en eau (500) qui injecte de l'eau sur la surface de paroi, un orifice d'entrée (437) à travers lequel l'eau est injectée dans la chambre (430), et un orifice d'évacuation (438) à travers lequel la vapeur est évacuée de l'intérieur de la chambre (430), et
    une forme irrégulière (440, 441) est formée sur la surface de paroi d'un passage d'écoulement de vapeur depuis l'orifice d'entrée (437) jusqu'à l'orifice d'évacuation (438),
    caractérisé en ce que dans le passage d'écoulement de vapeur, lorsqu'une distance depuis une portion médiane du passage d'écoulement de vapeur est augmentée vers l'orifice d'évacuation (438), le nombre des formes irrégulières est réduit, de telle sorte qu'un nombre des formes irrégulières (440, 441) sur un côté près de l'orifice d'entrée (437) soit plus grand qu'un nombre des formes irrégulières (440, 441) sur un côté près de l'orifice d'évacuation (438).
  2. Dispositif de traitement de vêtements selon la revendication 1, dans lequel le passage d'écoulement de vapeur a une structure où la forme irrégulière (440, 441) est disposée en continu.
  3. Dispositif de traitement de vêtements selon la revendication 1, dans lequel la forme irrégulière (440, 441) est une d'une pyramide triangulaire (441) et d'une pyramide carrée (440).
EP13832701.0A 2012-08-27 2013-07-24 Dispositif de traitement de linge Active EP2889414B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012186197A JP6244536B2 (ja) 2012-08-27 2012-08-27 衣類処理装置
PCT/JP2013/004498 WO2014034015A1 (fr) 2012-08-27 2013-07-24 Dispositif de traitement de linge

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US11946000B2 (en) 2019-05-24 2024-04-02 Eastman Chemical Company Blend small amounts of pyoil into a liquid stream processed into a gas cracker
WO2020247192A1 (fr) 2019-05-24 2020-12-10 Eastman Chemical Company Effluent de craquage de contenu de recyclage
US11365357B2 (en) 2019-05-24 2022-06-21 Eastman Chemical Company Cracking C8+ fraction of pyoil
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EP4054997A4 (fr) 2019-11-07 2024-02-21 Eastman Chemical Company Alpha-oléfines et alcools gras de contenu recyclé

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Publication number Publication date
EP2889414A4 (fr) 2015-10-21
JP6244536B2 (ja) 2017-12-13
EP2889414A1 (fr) 2015-07-01
CN104583480A (zh) 2015-04-29
CN104583480B (zh) 2017-07-28
JP2014042643A (ja) 2014-03-13
WO2014034015A1 (fr) 2014-03-06

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