US20210324568A1 - Laundry treating apparatus - Google Patents

Laundry treating apparatus Download PDF

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Publication number
US20210324568A1
US20210324568A1 US17/232,867 US202117232867A US2021324568A1 US 20210324568 A1 US20210324568 A1 US 20210324568A1 US 202117232867 A US202117232867 A US 202117232867A US 2021324568 A1 US2021324568 A1 US 2021324568A1
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United States
Prior art keywords
water
pipe
assembly
water supply
supply
Prior art date
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Abandoned
Application number
US17/232,867
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English (en)
Inventor
Kyoungmin CHOI
Soowon Park
Hoon Chang
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LG Electronics Inc
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LG Electronics Inc
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Publication date
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Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PARK, SOOWON, CHANG, HOON, CHOI, Kyoungmin
Publication of US20210324568A1 publication Critical patent/US20210324568A1/en
Assigned to LG ELECTRONICS INC. reassignment LG ELECTRONICS INC. CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE'S COUNTRY OF RECORD PREVIOUSLY RECORDED AT REEL: 055951 FRAME: 0543. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: PARK, SOOWON, CHANG, HOON, CHOI, Kyoungmin
Abandoned legal-status Critical Current

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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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/203—Laundry conditioning 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D06F58/04—Details 
    • D06F58/08—Driving 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/10—Drying cabinets or drying chambers having heating or ventilating means
    • D06F58/12—Drying cabinets or drying chambers having heating or ventilating means having conveying means for moving clothes, e.g. along an endless track
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/206—Heat pump 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • D06F58/263—Gas heating equipment
    • 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
    • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/56—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers related to air ducts, e.g. position of flow diverters
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/02—Water supply
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/28—Electric heating
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
    • D06F2105/30—Blowers
    • 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
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis

Definitions

  • the present disclosure relates to a laundry dryer, and more particularly, to a laundry treating apparatus that sprays high-temperature steam into a drum using a steam generating assembly.
  • a conventional laundry treating apparatus may not only drastically shorten a drying time of the laundry by supplying hot air to a drum that accommodates the laundry therein to dry the laundry, but also sterilize and disinfect the laundry.
  • the laundry treating apparatuses that perform the drying process also include a conventional laundry treating apparatus that supplies steam to the laundry to remove wrinkles from the laundry, improve a drying efficiency, perform the sterilization, and the like.
  • Korean Patent No. 10-1435823 discloses a laundry treating apparatus that supplies the steam to the laundry and then dries the laundry.
  • a water supply connector that connects an external water source, a water supply container, and a steam generator is disclosed in the conventional laundry treating apparatus.
  • the present disclosure is to ameliorate the problems of the conventional laundry treating apparatus as described above, and a purpose thereof is to provide a laundry treating apparatus that prevents backflow of water so as not to contaminate an external water source.
  • a laundry treating apparatus may include a drum rotatably installed inside a cabinet forming an appearance of the laundry treating apparatus to accommodate an object to be dried therein, a duct assembly constructed to re-supply air discharged from the drum to the drum, a circulating fan for providing a flow force to the air flowing along the duct assembly, a heat exchanger assembly disposed on the duct assembly to exchange heat with the air circulating along the duct assembly, a steam generating assembly including a steam generator for generating steam, wherein the steam generating assembly supplies the steam into the drum, and a water supply assembly including an internal water supply assembly and an external water supply assembly, wherein the water supply assembly supplies water for generating the steam to the steam generating assembly.
  • the water supply assembly may include an internal water supply pipe connected to the internal water supply assembly to supply water in the internal water supply assembly to the steam generator, a direct water pipe connected to the external water supply assembly to supply water in the external water supply assembly to the steam generator, a water supply inlet pipe connected to the steam generator, wherein the water in the internal water supply assembly or the water in the external water supply assembly flows into the water supply inlet pipe, a water supply connector for connecting the internal water supply pipe, the direct water pipe, and the water supply inlet pipe with each other, and a check valve assembly including at least one check valve installed on the direct water pipe or the internal water supply pipe to prevent water in the steam generator from flowing back.
  • the check valve assembly may include a connecting holder for connecting two pipes with each other, and a check valve inserted into and coupled to the connecting holder.
  • the connecting holder may include a holder main body formed in a cylindrical shape such that both ends in an axial direction thereof are respectively inserted into pipes, and a guide protrusion protruding from an outer circumferential face of the holder main body to guide assembly direction and position.
  • the check valve assembly may include a first direct water check valve installed on the direct water pipe to prevent the water from flowing back toward the external water supply assembly, and a second direct water check valve disposed between the first direct water check valve and the water supply connector.
  • a laundry treating apparatus may include a drum rotatably installed inside a cabinet forming an appearance of the laundry treating apparatus to accommodate an object to be dried therein, a duct assembly constructed to re-supply air discharged from the drum to the drum, a circulating fan for providing a flow force to the air flowing along the duct assembly, a heat exchanger assembly disposed on the duct assembly to exchange heat with the air circulating along the duct assembly, a steam generating assembly including a steam generator for generating steam, wherein the steam generating assembly supplies the steam into the drum, and a water supply assembly including an internal water supply assembly and an external water supply assembly, wherein the water supply assembly supplies water to the steam generating assembly.
  • the water supply assembly may include an internal water supply pipe connected to the internal water supply assembly to supply water in the internal water supply assembly to the steam generator, a direct water pipe connected to the external water supply assembly to supply water in the external water supply assembly to the steam generator, a water supply inlet pipe connected to the steam generator, wherein the water in the internal water supply assembly or the water in the external water supply assembly flows into the water supply inlet pipe, and a water supply connector for connecting the internal water supply pipe, the direct water pipe, and the water supply inlet pipe with each other.
  • the water supply connector may include a connector main body having a flow channel defined therein for communicating the internal water supply pipe, the direct water pipe, and the water supply inlet pipe with each other, and a connector backflow-preventing valve coupled into the connector main body to prevent backflow of water toward the external water supply assembly.
  • the connector main body may include an outlet coupled to the water supply inlet pipe, wherein the outlet discharges the water introduced from the internal water supply assembly or the external water supply assembly to the water supply inlet pipe, an internal water supply inlet connected to the outlet and coupled to the internal water supply pipe, wherein the water in the internal water supply assembly is introduced into the internal water supply, and a direct water inlet connected to the outlet and coupled to the direct water pipe, wherein the water in the direct water pipe is introduced into the direct water inlet.
  • the connector backflow-preventing valve may be inserted into and coupled to the direct water inlet.
  • the direct water inlet may be formed to have an inner diameter larger than an inner diameter of the outlet.
  • the direct water inlet may be formed to have an outer diameter larger than an outer diameter of the outlet.
  • the direct water inlet may include a guide protrusion protruding from an outer circumferential face of the direct water inlet to guide an insertion position of the connector backflow-preventing valve.
  • the direct water inlet may further include a direction indicating protrusion connected to a face in an axial direction of the guide protrusion and protruding in a triangular column shape to indicate an assembly direction.
  • the connector backflow-preventing valve may include a valve body formed in a cylindrical shape to be inserted into and coupled to the direct water inlet, and a valve outlet extending at one end in the axial direction of the valve body such that a diameter thereof is reduced, wherein the valve outlet is disposed inside the connector main body to discharge the water introduced from the direct water pipe, wherein the valve outlet blocks flow of the water introduced from the internal water supply pipe or the water supply inlet pipe.
  • the connector backflow-preventing valve may further include a coupling support hook extending radially outward from the other end in the axial direction of the valve body and supported on the connector main body.
  • the connector backflow-preventing valve may further include a coupling protrusion protruding along a circumferential direction on an outer circumferential face of the valve body and in contact with an inner circumferential face of the connector main body.
  • the water supply assembly may further include a direct water check valve installed on the direct water pipe to prevent the water from flowing back toward the external water supply assembly.
  • the water supply assembly may further include an internal water supply check valve installed in the internal water supply pipe to prevent water from flowing back toward the internal water supply assembly.
  • a size of an inner diameter of the valve body may correspond to a size of an inner diameter of the outlet.
  • check valve may be mounted only by inserting and coupling the check valve into the connector and assembling the connector with the pipe, there is an effect of improving the assemblability.
  • FIG. 1 is a view for illustrating an appearance of a laundry treating apparatus according to an embodiment of the present disclosure.
  • FIG. 2 is a cross-sectional view illustrating an internal structure of a laundry treating apparatus according to an embodiment of the present disclosure.
  • FIG. 3 is a view for illustrating pipe structures of a water supply assembly and a steam generating assembly in a laundry treating apparatus according to an embodiment of the present disclosure.
  • FIG. 4 is a view for illustrating a check valve in a laundry treating apparatus according to an embodiment of the present disclosure.
  • FIG. 5 is a cross-sectional view of FIG. 4 .
  • FIG. 6 is a view for illustrating pipe structures of a water supply assembly and a steam generating assembly in a laundry treating apparatus according to another embodiment of the present disclosure.
  • FIG. 7 is a view illustrating a water supply connector in a laundry treating apparatus according to another embodiment of the present disclosure.
  • FIG. 8 is a cross-sectional view of FIG. 7 .
  • FIG. 9 is a perspective view illustrating a structure of a connector backflow-preventing valve in a laundry treating apparatus according to another embodiment of the present disclosure.
  • first may be referred to as a second component
  • second component may be referred to as a first component
  • FIG. 1 is a view for illustrating an appearance of a laundry treating apparatus according to an embodiment of the present disclosure
  • FIG. 2 is a cross-sectional view illustrating an internal structure of a laundry treating apparatus according to an embodiment of the present disclosure.
  • a cabinet 10 that forms an appearance of a laundry treating apparatus 1 includes a front panel 11 constituting a front face, a rear panel 12 constituting a rear face, a pair of side panels 14 respectively constituting side faces, and a top panel 13 constituting a top face of the laundry treating apparatus 1 .
  • the front panel 11 may include a laundry inlet 111 defined therein to communicate with a drum 20 to be described later, and a door 112 pivotably coupled to the cabinet 10 to open and close the laundry inlet 111 .
  • a control panel 117 is disposed on the front panel 11 .
  • An input unit 118 that receives a control command from a user, a display 119 that outputs information such as a control command or the like selectable by the user, and a main controller (not shown) that controls a command for performing a process of the laundry treating apparatus 1 may be installed on the control panel 117 .
  • the input unit 118 may include a power supply request unit that requests power supply to the laundry dryer, a course input unit that enables the user to select a desired course among a number of courses, an execution request unit that requests start of the course selected by the user, and the like.
  • the display 119 may include at least one of a display panel capable of outputting characters and/or figures, and a speaker capable of outputting audio signals and sounds. The user may easily identify a status of a currently performed process, a remaining time, and the like through the information output through the display 119 .
  • the drum 20 that is rotatably disposed and provides a space therein in which laundry (an object to be dried) is accommodated, a duct assembly 30 that defines a flow channel for re-supplying air discharged from the drum 20 to the drum 20 , and a heat exchanger assembly 40 that dehumidifies and heats the air introduced into the duct assembly 30 and then re-supplies the dehumidified air to the drum 20 may be arranged inside the cabinet 10 .
  • the drum 20 includes a cylindrical drum body 21 with an open front face.
  • a first support 22 that rotatably supports a front face of the drum body 21 and a second support 23 that rotatably supports a rear face of the drum body 21 may be arranged inside the cabinet 10 .
  • the first support 22 may include a first fixed body 22 a fixed inside the cabinet 10 , a drum laundry inlet 22 b that is disposed to penetrate the first fixed body 22 a to communicate the laundry inlet 111 with an interior of the drum body 21 , and a first support body 22 c disposed on the first fixed body 22 a and inserted into the front face of the drum body 21 .
  • the first support 22 may further include a connecting body 22 d that connects the laundry inlet 111 with the drum laundry inlet 22 b.
  • the connecting body 22 d may be formed in a pipe shape extending from the drum laundry inlet 22 b toward the laundry inlet 111 .
  • an air outlet 22 e that communicates with the duct assembly 30 may be formed in the connecting body 22 d.
  • the air outlet 22 e which is a passage that allows the air inside the drum body 21 to flow to the duct assembly 30 , may be defined as a through-hole penetrating the connecting body 22 d.
  • the second support 23 includes a second fixed body 23 a fixed inside the cabinet 10 and a second support body 23 b disposed on the second fixed body 23 a and inserted into the rear face of the drum body 21 .
  • the second support 23 further includes an air inlet 23 c defined to penetrate the second fixed body 23 a and communicating the interior of the drum body 21 with an interior of the cabinet 10 .
  • the duct assembly 30 is constructed to connect the air outlet 22 e with the air inlet 23 c.
  • the cylindrical drum body 21 may be rotated through a driver 50 of various shapes.
  • FIG. 2 illustrates an embodiment in which the driver 50 includes a drum motor 51 fixed inside the cabinet 10 , a pulley 52 rotated by the drum motor 51 , and a belt 53 that connects a circumferential face of the pulley 52 with a circumferential face of the drum body 21 .
  • first support 22 may further include a first roller R 1 that rotatably supports the circumferential face of the drum body 21
  • the second support 23 may further include a second roller R 2 that rotatably supports the circumferential face of the drum body 21 .
  • a direct drive type driver in which the drum motor 51 is directly connected to the drum to rotate the drum without using the pulley and the belt may also be applied to the present disclosure, which is obviously within the scope of the present disclosure.
  • the following description will be made based on the illustrated embodiment of the driver 50 .
  • the duct assembly 30 includes an exhaust duct 31 connected to the air outlet 22 e, a supply duct 32 connected to the air inlet 23 c, and a connecting duct 33 that connects the exhaust duct 31 with the supply duct 32 and includes the heat exchanger assembly 40 installed therein.
  • the exhaust duct 31 may communicate with the front face of the drum 20
  • the supply duct 32 may communicate with a rear face of the drum 20 .
  • the heat exchanger assembly 40 may be implemented as various apparatuses capable of sequentially performing dehumidification and heating of the air introduced into the duct assembly 30 .
  • the heat exchanger assembly 40 may be implemented as a heat pump system.
  • the heat exchanger assembly 40 may include a circulating fan 43 that flows the air along the duct assembly 30 , a first heat exchanger (a heat absorber) 41 that performs a dehumidification function by lowering humidity of the air introduced into the duct assembly 30 , and a second heat exchanger (a heater) 42 disposed inside the duct assembly 30 to heat the air that has passed through the first heat exchanger 41 .
  • the circulating fan 43 is constructed to include an impeller 43 a disposed in the duct assembly 30 and an impeller motor 43 b that rotates the impeller 43 a, and provides a flow force to the air flowing along the duct assembly 30 .
  • the impeller 43 a may be installed at any position in the exhaust duct 31 , the connecting duct 33 , and the supply duct 32 .
  • FIG. 2 illustrates an embodiment in which the impeller 43 a is disposed in the connecting duct 33 .
  • the present disclosure is not limited thereto, but for convenience, the description will be made with the embodiment in which the impeller 43 a is disposed in the connecting duct 33 .
  • the heat exchanger assembly 40 may perform heat exchange with the air circulating along the duct assembly 30 .
  • the heat absorber 41 and the heater 42 are sequentially arranged inside the connecting duct 33 along a direction from the exhaust duct 31 to the supply duct 32 , and are connected to each other through a refrigerant pipe 44 that defines therein a circulation flow path of a refrigerant.
  • the heat absorber 41 is means for cooling the air and evaporating the refrigerant by transferring heat of the air introduced into the exhaust duct 31 to the refrigerant.
  • the heater 42 is means for heating the air and condensing the refrigerant by transferring heat of the refrigerant that has passed through the compressor 45 to the air.
  • the compressor 45 compresses the refrigerant that is heat-exchanged with the air circulating along the duct assembly 30 by receiving a rotational force by the compressor motor 45 a.
  • the laundry treating apparatus 1 in order to collect condensate water that has been condensed from the air passing through the heat absorber 41 and collected on a bottom face of the connecting duct 33 , the laundry treating apparatus 1 according to the present disclosure further includes a water collector 60 .
  • the condensate water condensed in the heat absorber 41 may be firstly collected in the water collector 60 and then secondarily collected in a water storage 70 .
  • the water collector 60 may be located inside the connecting duct 33 as shown or may be separately disposed in a space spaced apart from the connecting duct 33 .
  • the condensate water firstly collected through the water collector 60 is supplied to the water storage 70 through a condensate water supply pipe 61 .
  • a condensate water pump 62 is disposed in the condensate water supply pipe 61 for smooth discharge of the condensate water.
  • the water storage 70 includes a water storage tank 72 constructed to be extended from one side of the front panel 11 to the outside.
  • the water storage tank 72 is constructed to collect the condensate water delivered from the water collector 60 to be described later.
  • the user may remove the condensate water by extending the water storage tank 72 from the cabinet 10 and then mount the water storage tank 72 into the cabinet 10 again.
  • the laundry treating apparatus according to the present disclosure may be placed in any place even in a place where a drainage hole or the like is not installed.
  • the water storage 70 may be constructed to include the water storage tank 72 that is detachably disposed in the cabinet 10 to provide a space for storing the water therein and an inlet 72 a defined to penetrate the water storage tank 72 to inflow the water discharged from the condensate water supply pipe 61 into the water storage tank 72 .
  • the water storage tank 72 may be formed as a drawer-type tank extended from the cabinet 10 .
  • a water storage mounting hole into which the water storage tank 72 is retracted is defined in the front panel 11 of the cabinet.
  • a panel 71 is fixed on a front face of the water storage tank 72 .
  • the panel 71 may be constructed to form a portion of the front panel 11 by detachably coupled to the water storage mounting hole.
  • the panel 71 may further include a groove 71 a into which a user's hand is inserted to grip the panel 71 .
  • the panel 71 also functions as a handle for extending or retracting the water storage tank 72 from or into the cabinet.
  • the inlet 72 a is defined to receive the condensate water discharged from a condensate water nozzle 63 fixed to the cabinet 10 .
  • the condensate water nozzle 63 may be fixed to the top panel 13 of the cabinet 10 such that the condensate water nozzle 63 is positioned above the inlet 72 a when the water storage tank 72 is retracted into the cabinet 10 .
  • the user may dispose of the water inside the water storage tank 72 by extending the water storage tank 72 from the cabinet 10 and then turning the water storage tank 72 over or tilting the water storage tank 72 in a direction in which the inlet 72 a is located.
  • the water storage tank 72 may further include a communication hole 72 b defined to penetrate a top face thereof such that the water inside the water storage tank 72 is easily discharged through the inlet 72 a.
  • the laundry treating apparatus 1 includes a first filter F 1 and a second filter F 2 as means for removing foreign substances such as lint, dust, and the like generated in a drying process of laundry such as clothing and the like.
  • the first filter F 1 is disposed in the exhaust duct 31 to firstly filter foreign substances contained in the air discharged from the drum 20 .
  • the second filter F 2 is disposed downstream of the first filter F 1 in a flow direction of the air such that the foreign substances contained in the air that has passed through the first filter F 1 may be secondarily filtered. More specifically, as shown, the second filter F 2 is preferably disposed upstream of the first heat exchanger 41 in the connecting duct 33 . This is to prevent the foreign substances contained in the air from accumulating in the first heat exchanger 41 acting as the heat absorber and contaminating the first heat exchanger 41 or causing performance degradation of the first heat exchanger 41 .
  • the laundry treating apparatus 1 further includes a supply assembly 80 that includes a first supply assembly 81 and second supply assembly 82 and a steam generating assembly 90 that generates steam by receiving water from the supply assembly 80 .
  • the first supply assembly 81 and the second supply assembly 82 may be provided to supply water to the steam generating assembly 90 from different water sources.
  • the steam generating assembly 90 may be constructed to generate the steam by receiving fresh water instead of the condensate water.
  • the steam generating assembly 90 may include a steam generator 91 , a steam pipe 92 , a steam nozzle 93 , and an accumulator 94 (see FIG. 3 ).
  • the steam generator 91 may receive the water from the supply assembly 80 and heat the supplied water to generate the steam.
  • a pipe structure through which the water flows into the steam generator 91 and the steam is discharged will be described later.
  • the steam generator 91 has been described to use a scheme (hereinafter, referred to as an ‘induction heating scheme’ for convenience) of generating the steam by heating a certain amount of water accommodated therein with a heater (not shown in the drawing), but is not limited thereto.
  • an induction heating scheme for convenience
  • the steam generated from the steam generator 91 may flow into the steam nozzle 93 and the steam nozzle 93 may inject the steam into the drum 20 .
  • the steam pipe 92 connects the steam generator 91 with the steam nozzle 93 , and a flow channel along which the steam may flow is defined in the steam pipe 92 . Accordingly, the steam generated from the steam generator 91 may flow along the steam pipe 92 and be discharged into the drum 20 through the steam nozzle 93 .
  • the accumulator 94 may be installed on the steam pipe 92 and serve to separate the condensate water from the steam when the steam generated from the steam generator 91 is condensed in the steam pipe 92 to become the condensate water. In this connection, the condensed condensate water may flow back into the steam generator 91 or flow into the water collector 60 .
  • the first supply assembly 81 may correspond to an internal water supply assembly 81
  • the second supply assembly 82 may correspond to the external water supply assembly 82 .
  • the steam generating assembly 90 may be controlled to supply the steam into the drum body 21 by receiving the water through the external water supply assembly 82 as well as the internal water supply assembly 81 as needed.
  • the external water supply assembly 82 may include a direct water valve 82 a adjacent to the rear panel 13 or fixed to the rear panel 13 , and a direct water pipe 84 that supplies the water delivered from the direct water valve 82 a to the steam generating assembly 90 .
  • the direct water valve 82 a may be constructed to be coupled with an external water source.
  • the direct water valve 82 a may be coupled to a water supply pipe (not shown) extending to the rear face of the cabinet.
  • the steam generating assembly 90 may be constructed to receive the water directly through the direct water valve 82 a.
  • the steam generating assembly 90 may receive the water for generating the steam through the direct water valve 82 a as needed.
  • the direct water valve 82 a may be directly controlled by a controller 100 .
  • the controller 100 may be installed on the control panel 117 , but as shown in FIG. 1 , the controller 100 may be constructed as a separate control panel to prevent overload of the control panel 117 and not increase a manufacturing cost.
  • the controller 100 may be disposed adjacent to the steam generating assembly 90 .
  • the controller 100 may be disposed on the side panel 14 on which the steam generating assembly 90 is installed to reduce a length of a control line or the like connected to the steam generating assembly 90 .
  • the steam generating assembly 90 is preferably installed adjacent to the direct water valve 82 a. Accordingly, residual water may be prevented from remaining unnecessarily in the direct water pipe 84 , and the water may be immediately supplied when necessary.
  • the internal water supply assembly 81 includes a storage tank 810 that stores the water therein, a supply pump 820 that receives the water from the storage tank 810 and delivers the water to the steam generating assembly 90 , a tank housing 830 that provides a space for accommodating the storage tank 810 and the supply pump 820 therein, and an internal water supply pipe 83 that connects the supply pump 820 with the steam generating assembly 90 and has a flow channel defined therein through which the water may flow.
  • the internal water supply assembly 81 is constructed to supply the stored water to the steam generating assembly. That is, the water stored in the storage tank 810 may be supplied to the steam generating assembly 90 along the internal water supply pipe 83 by an operation of the supply pump 820 .
  • FIG. 3 is a view for illustrating pipe structures of a water supply assembly and a steam generating assembly in a laundry treating apparatus according to an embodiment of the present disclosure
  • FIG. 4 is a view for illustrating a check valve in a laundry treating apparatus according to an embodiment of the present disclosure
  • FIG. 5 is a cross-sectional view of FIG. 4 .
  • the supply assembly 80 of the present disclosure may include the internal water supply assembly 81 that supplies the water from the storage tank 810 to the steam generating assembly 90 , the external water supply assembly 82 that supplies the water from the external water source to the steam generating assembly 90 , a water supply connector 86 that is able to receive the water from at least one of the internal water supply assembly 81 and the external water supply assembly 82 , and a water supply inlet pipe 85 that connects the water supply connector 86 with the steam generating assembly 90 .
  • the supply assembly 80 may further include a check valve assembly 87 that prevents backflow of the water or the steam in at least one of the internal water supply assembly 81 , the external water supply assembly 82 , and the steam generating assembly 90 .
  • the internal water supply assembly 81 may include the internal water supply pipe 83 that supplies the water in the storage tank 810 to the steam generator 91 .
  • the external water supply assembly 82 may include the direct water pipe 84 that is in communication with the external water source to receive the water and supply the water to the steam generator 91 .
  • the internal water supply pipe 83 and the direct water pipe 84 may be connected to the water supply connector 86 .
  • the water in the internal water supply assembly 81 or the water in the external water supply assembly 82 may flow into the water supply connector 86 .
  • the water supply connector 86 and the steam generator 91 are connected to each other by the water supply inlet pipe 85 , so that the water in the internal water supply assembly 81 or the water in the external water supply assembly 82 may be supplied to the steam generator 91 .
  • the internal water supply pipe 83 may mean a pipe in which a flow channel along which the water may flow is defined.
  • One end of the internal water supply pipe 83 may be in communication with the storage tank 810 or the supply pump 820 , and the other end thereof may be connected to the water supply connector 86 .
  • the internal water supply pipe 83 includes a first internal water supply pipe 83 a and a second internal water supply pipe 83 b.
  • the check valve assembly 87 may further include an internal water supply check valve 87 c that prevents backflow of water flowing along the first internal water supply pipe 83 a and the second internal water supply pipe 83 b.
  • One end of the first internal water supply pipe 83 a may be in communication with the storage tank 810 or the supply pump 820 and the other end thereof may be connected to the internal water supply check valve 87 c.
  • one end of the second internal water supply pipe 83 b may be connected to the internal water supply check valve 87 c, and the other end thereof may be connected to the water supply connector 86 .
  • the direct water pipe 84 may mean a pipe in which a flow channel along which the water may flow is defined. One end of the direct water pipe 84 may be connected to the external water supply assembly 82 , and the other end thereof may be connected to the water supply connector 86 .
  • the check valve assembly 87 may include direct water check valves 87 a and 87 b that prevent the backflow of the water flowing along the direct water pipe 84 .
  • a plurality of direct water check valves may be arranged.
  • the direct water pipe 84 may include a first direct water pipe 84 a, a second direct water pipe 84 b, and a third direct water pipe 84 c.
  • One end of the first direct water pipe 84 a may be connected to the direct water valve 82 a, and the other end thereof may be connected to a first direct water check valve 87 a.
  • both ends of the second direct water pipe 84 b may be connected to the first direct water check valve 87 a and a second direct water check valve 87 b, respectively.
  • one end of the third direct water pipe 84 c may be connected to the second direct water check valve 87 b, and the other end thereof may be connected to the water supply connector 86 .
  • two check valves of the check valve assembly 87 may be respectively disposed between the first direct water pipe 84 a and the second direct water pipe 84 b and between the second direct water pipe 84 b and the third direct water pipe 84 c.
  • the supply assembly 80 may include the water supply inlet pipe 85 connected to the steam generator 91 and supplying the water from the internal water supply assembly 81 or the water supplied from the external water supply assembly 82 to the steam generator 91 .
  • the water supply inlet pipe 85 may mean a pipe in which a flow channel along which the water may flow is defined. One end of the water supply inlet pipe 85 may be connected to the water supply connector 86 , and the other end thereof may be connected to the steam generator 91 .
  • the water supply connector 86 may connect the internal water supply pipe 83 , the direct water pipe 84 , and the water supply inlet pipe 85 with each other.
  • the water supply connector 86 may be in a form of a pipe open in three directions.
  • the water supply connector 86 may be a T-shaped connector.
  • the check valve assembly 87 may mean a structure that plays a role of preventing backflow of fluid.
  • the check valve assembly 87 may be a component that is disposed on the flow channel, and does not block flow of the fluid when the fluid flows in a direction intended at a time of design (hereinafter, able to be referred to as a ‘forward direction’), but blocks the flow of the fluid when the fluid flows backward in a direction opposite to the intended direction (hereinafter, able to be referred to as a ‘reverse direction’).
  • Both the internal check valve and the direct water check valve may have the same structure.
  • a laundry treating apparatus of a type of spraying high-temperature steam into the drum is constructed to supply the water into the steam generator using the internal water supply assembly or the external water supply assembly.
  • a reverse osmosis pressure for the direct water or a reverse osmosis pressure for the stored water may occur.
  • the contaminated water may contaminate the waterworks or the storage tank 810 in which the clean water is stored.
  • the check valve assembly 87 may be installed on the direct water pipe 84 or the internal water supply pipe 83 to prevent the water in the steam generator 91 or the internal water supply assembly 81 from flowing back.
  • the check valve assembly 87 may include the first direct water check valve 87 a installed on the direct water pipe 84 to prevent the water from flowing back toward the external water supply assembly 82 , and the second direct water check valve 87 b placed between the first direct water check valve 87 a and the water supply connector 86 .
  • check valve assembly 87 may be installed on the internal water supply pipe 83 to prevent the water from flowing back toward the internal water supply assembly 82 .
  • first direct water check valve 87 a may be disposed between the first direct water pipe 84 a and the second direct water pipe 84 b
  • second direct water check valve 87 b may be disposed between the second direct water pipe 84 b and the third direct water pipe 84 c.
  • the internal water supply check valve 87 c may be disposed between the first internal water supply pipe 83 a and the second internal water supply pipe 83 b.
  • the water flowed back may be prevented from flowing into the internal water supply assembly 81 and the external water supply assembly 82 .
  • the two check valves of the check valve assembly 87 are arranged to prevent the backflow even when damage occurs in one of the two check valves of the check valve assembly 87 .
  • each of the internal water supply pipe 83 , the direct water pipe 84 , and the water supply inlet pipe 85 has one check valve of the check valve assembly 87 .
  • the water flowing back from the steam generator 91 is blocked by the two check valve of the check valve assembly 87 while flowing to the external water supply assembly 82 .
  • FIGS. 4 and 5 show an embodiment of the check valve assembly 87 .
  • the check valve assembly 87 of the present disclosure may include a connecting holder 871 and a backflow-preventing valve 872 .
  • the check valve assembly 87 may include the connecting holder 871 that connects two pipes with each other and the backflow-preventing valve 872 inserted into and coupled to the connecting holder 871 to block the backflow of the fluid.
  • the connecting holder 871 may include a holder main body 871 a and a guide protrusion 871 b.
  • the connecting holder 871 may include a holder main body 871 a and a guide protrusion 871 b that protrudes along a circumferential direction from an outer circumferential face of the holder main body 871 a.
  • the holder main body 871 a may be formed in a cylindrical shape to allow the fluid to flow therein, and both ends thereof may be formed to be inserted into the internal water supply assembly 81 and the external water supply assembly 82 , respectively.
  • the holder main body 871 a may be formed to be inserted into at least one of the internal water supply pipe 83 , the direct water pipe 84 , and the water supply inlet pipe 85 .
  • an outlet 871 d is formed at an end in a direction in which the fluid is discharged (in the forward direction) of the holder main body 871 a.
  • An inner diameter of the holder main body 871 a may become smaller in a direction from a vicinity of the outlet 871 d to the outlet 871 d.
  • the outlet 871 d may be formed as the inner diameter of the holder main body 871 a gradually decreases.
  • the guide protrusion 871 b is formed to protrude from the outer circumferential face of the holder main body 871 a to guide assembly direction and position.
  • the guide protrusion 871 b may be formed to protrude in a ring shape along the outer circumferential face of the holder main body 871 a.
  • the connecting holder 871 may further include a direction indicating protrusion 871 c connected to a face in an axial direction of the guide protrusion 871 b and formed to protrude from the outer circumferential face of the holder main body 871 a in a form of a triangular column to indicate the assembly direction.
  • the direction indicating protrusion 871 c may extend from one face of the guide protrusion 871 b in a longitudinal direction of the holder main body 871 a.
  • the direction indicating protrusion 871 c may extend from the guide protrusion 871 b toward the outlet 871 d.
  • an operator may recognize a direction of a triangle (or an arrow) indicated on the direction indicating protrusion 871 c, and may assemble the connecting holder 871 to the pipe after inserting the backflow-preventing valve 872 into the connecting holder 871 in consideration of the flow of the fluid intended at a time of designing. That is, incorrect assembly may be prevented through the guide protrusion 871 b and the direction indicating protrusion 871 c of the present disclosure.
  • the backflow-preventing valve 872 may include a valve body 872 a, a valve outlet 872 b, a coupling support hook 872 c, and a coupling protrusion 872 d.
  • the backflow-preventing valve 872 includes the valve body 872 a inserted into the connecting holder 871 .
  • the valve outlet 872 b that discharges the fluid introduced in the forward direction is formed at one end of the valve body 872 a.
  • the coupling support hook 872 c hooked and supported on an end of the connecting holder 871 is formed at the other end of the valve body 872 a.
  • the coupling protrusion 872 d supported in contact with an inner circumferential face of the connecting holder 871 protrudes from an outer circumferential face of the valve body 872 a.
  • valve body 872 a may be formed in a cylindrical shape to be inserted into and coupled to the holder main body 871 a.
  • an inner diameter of the valve body 872 a may correspond to a size of an inner diameter of the outlet 871 d of the connecting holder 871 .
  • a size of the inner diameter of the valve body 872 a may be equal to the size of the inner diameter of the outlet 871 d of the connecting holder 871 .
  • an amount of fluid flowing into the valve body 872 a and an amount of fluid discharged through the outlet 871 d may be uniformly maintained, and an occurrence of pulsation or the like resulted from the inflow of the fluid may be prevented.
  • valve outlet 872 b may be formed to extend while narrowing in a diameter at one end in the axial direction of the valve body 872 a.
  • valve outlet 872 b may have various forms in which an area of a flow channel along which the fluid is discharged decreases.
  • valve outlet 872 b may be formed to extend while gradually narrowing one end in the axial direction of the cylindrical valve body 872 a in a conical shape.
  • valve outlet 872 b may be formed to be opened in a rectangular shape as one end of the valve body 872 a narrows in an axisymmetric manner. That is, one end in the axial direction of the valve body 872 a may be extended while forming inclined faces to be closer to each other, and the extended inclined faces may be gathered to define the rectangular hole.
  • valve outlet 872 b of the present disclosure may be formed inside the holder main body 871 a to discharge the water introduced in the forward direction, and may interfere or block flow of the water flowing backward in the reverse direction.
  • the coupling support hook 872 c may be formed to extend radially outward from the other end of the valve body 872 a and may be supported in contact with the holder main body 871 .
  • the coupling support hook 872 c may be formed to protrude radially outward from the other end of the valve body 872 a, and may protrude in a shape of a hook along the circumferential direction.
  • the coupling support hook 872 c of the present disclosure may be hooked and supported on an end in the direction in which the fluid is introduced (an end opposite to the outlet 871 d ) of the holder main body 871 a. Accordingly, the backflow-preventing valve 872 may be supported even when an inflow pressure of the fluid is large.
  • the coupling protrusion 872 d may protrude from the outer circumferential face of the valve body 872 a along the circumferential direction, and may be in contact with the inner circumferential face of the holder main body 871 a.
  • the coupling protrusion 872 d may include two protrusions protruding from the outer circumferential face of the valve body 872 a along the circumferential direction in a rib shape.
  • the coupling protrusion 872 d of the present disclosure may be supported in contact with the inner circumferential face of the holder main body 871 a, and deviation of the backflow-preventing valve 872 from the connecting holder 871 by the pressure of the fluid may be prevented.
  • the backflow-preventing valve 872 of the present embodiment has the same structure as a connector backflow-preventing valve 862 to be described later, so that a structure of the connector backflow-preventing valve 862 disclosed in FIG. 9 may be understood using the structure of the backflow-preventing valve 872 .
  • FIG. 6 is a view for illustrating pipe structures of a water supply assembly and a steam generating assembly in a laundry treating apparatus according to another embodiment of the present disclosure
  • FIG. 7 is a view illustrating a water supply connector in a laundry treating apparatus according to another embodiment of the present disclosure
  • FIG. 8 is a cross-sectional view of FIG. 7
  • FIG. 9 is a perspective view illustrating a structure of a connector backflow-preventing valve.
  • the two check valve of the check valve assembly 87 are installed on the direct water pipe 84 to prevent the water in the internal water supply assembly 81 or the steam generator 91 from flowing back to the external water supply assembly 82 .
  • the accumulator 94 may be installed.
  • the accumulator 94 is coupled to a top face frame 24 disposed above the drum 20 and is disposed such that a portion of the accumulator 94 supports the direct water pipe 84 by holding an outer circumferential face of the direct water pipe 84 .
  • the direct water pipe 84 in order to place the two check valves of the check valve assembly 87 on the direct water pipe 84 , the direct water pipe 84 should be divided into a first direct water pipe 84 a, a second direct water pipe 84 b, and a third direct water pipe 84 c, the first direct water check valve 87 a should be assembled between the first direct water pipe 84 a and the second direct water pipe 84 b, and the second direct water check valve 87 b should be assembled between the second direct water pipe 84 b and the third direct water pipe 84 c.
  • another embodiment of the present disclosure proposes a structure that prevents the water from flowing back to the external water supply assembly 82 while improving assemblability and space efficiency.
  • a water supply connector 86 ′ according to another embodiment of the present disclosure will be described with reference to FIGS. 2 and 6 to 8 as follows.
  • the water supply connector 86 ′ may be constructed to connect the internal water supply pipe 83 , the direct water pipe 84 , and the water supply inlet pipe 85 with each other, and prevent the water from flowing back toward the external water supply assembly 81 .
  • the water supply connector 86 ′ includes a connector main body 861 and a connector backflow-preventing valve 862 .
  • the connector main body 861 has a structure in which a flow channel for communicating the internal water supply pipe 83 , the direct water pipe 84 , and the water supply inlet pipe 85 with each other is defined therein.
  • the connector main body 861 may be in a form of a pipe open in three directions including an outlet 861 a, an internal water supply inlet 861 b, and a direct water inlet 861 c defined therein.
  • the connector main body 861 may be a T-shaped connector in which the outlet 861 a and the direct water inlet 861 c are connected to each other in a straight line on the same axis, and the internal water supply inlet 861 b is connected perpendicularly to the outlet 861 a.
  • the outlet 861 a may be coupled to the water supply inlet pipe 85 , and may discharge the water introduced from the internal water supply assembly 81 or the external water supply assembly 82 to the water supply inlet pipe 85 .
  • the outlet 861 a may be formed in a cylindrical shape to define therein a flow channel along which the water for generating the steam is introduced, and a discharge protrusion 861 aa that guides coupling with the water supply inlet pipe 85 may be formed to protrude along the circumferential direction on an outer circumferential face of the outlet 861 a.
  • the internal water supply inlet 861 b may communicate with the outlet 861 a, and may be coupled to the internal water supply pipe 83 to define therein a flow channel along which the water discharged from the internal water supply assembly 81 is introduced.
  • the internal water supply inlet 861 b may be formed in a cylindrical shape to define therein a flow channel along which the water discharged from the internal water supply assembly 81 is introduced, and a water supply protrusion 861 ba that guides coupling with the internal water supply pipe 83 may be formed to protrude along the circumferential direction on an outer circumferential face of the internal water supply inlet 861 b.
  • a steam pipe seating face 861 bb that guides a position where the steam pipe 92 is disposed may be formed on the outer circumferential face of the internal water supply inlet 861 b.
  • a size of an inner diameter ⁇ 2 of the internal water supply inlet 861 b may be the same as a size of an inner diameter ⁇ 1 of the outlet 861 a.
  • the water introduced into the internal water supply inlet 861 b may be stably discharged to the water supply inlet pipe 85 without changes in a water pressure and a flow rate.
  • the direct water inlet 861 c may be connected to the outlet 861 a, and may be coupled to the direct water pipe 84 to define therein a flow channel along which the water from the direct water pipe 82 b is introduced.
  • the direct water inlet 861 c may be formed in a cylindrical shape to define therein a flow channel along which the water discharged from the external water supply assembly 82 is introduced, and a direct water protrusion 861 ca that guides coupling with the direct water pipe 84 may be formed to protrude along the circumferential direction on an outer circumferential face of the direct water inlet 861 c.
  • the direct water inlet 861 c may further include a direction indicating protrusion 861 cb extending from the guide protrusion 861 ca to indicate the assembly direction.
  • the direction indicating protrusion 861 cb may be formed to protrude from the guide protrusion 861 ca in the form of the triangular pillar or the arrow.
  • the operator when assembling the water supply connector 86 ′, the operator may recognize a direction of a triangle (or an arrow) indicated on the direction indicating protrusion 861 cb, and may assemble the water supply connector 86 ′ to the pipe after inserting the connector backflow-preventing valve 862 to be described later into the connector main body 861 in consideration of the flow of the fluid intended at a time of designing. Therefore, in the present disclosure, there is an effect of preventing incorrect assembly by the direction indicating protrusion 861 cb.
  • an inner diameter 13 of the direct water inlet 861 c may be larger than the inner diameter ⁇ 1 of the outlet 861 a ( ⁇ 3 > ⁇ 1 ).
  • an outer diameter of the direct water inlet 861 c may be larger than an outer diameter of the outlet 861 a. Therefore, according to the present disclosure, the connector backflow-preventing valve 862 may be easily inserted into the direct water inlet 861 c.
  • the connector backflow-preventing valve 862 may be coupled into the connector main body 861 to prevent the backflow of the water towards the external water supply assembly. Specifically, the connector backflow-preventing valve 862 may be inserted into and coupled to the direct water inlet 861 c.
  • the connector backflow-preventing valve 862 may include a valve body 862 a, a valve outlet 862 b, a coupling support hook 862 c, and a coupling protrusion 862 d.
  • the connector backflow-preventing valve 862 includes the valve body 862 a inserted into the connector main body 861 .
  • the valve outlet 862 b that discharges the fluid introduced in the forward direction is formed at one end of the valve body 862 a.
  • the coupling support hook 862 c hooked and supported on an end of the connector main body 861 is formed at the other end of the valve body 862 a.
  • the coupling protrusion 862 d supported in contact with an inner circumferential face of the connector main body 861 protrudes from an outer circumferential face of the valve body 862 a.
  • valve body 862 a may be formed in a cylindrical shape to be inserted into and coupled to the direct water inlet 861 c.
  • an inner diameter 14 of the valve body 862 a may correspond to the size of the inner diameter ⁇ 1 of the outlet 861 a.
  • a size of the inner diameter 14 of the valve body 862 a may be equal to the size of the inner diameter ⁇ 1 of the outlet 861 a.
  • an amount of fluid flowing into the valve body 862 a and an amount of fluid discharged through the outlet 861 a may be uniformly maintained, and an occurrence of pulsation or the like resulted from the inflow of the fluid may be prevented.
  • valve outlet 862 b may be formed to extend while narrowing in a diameter at one end in the axial direction of the valve body 862 a.
  • valve outlet 862 b may have various forms in which an area of a flow channel decreases.
  • valve outlet 862 b may be formed to extend while gradually narrowing one end in the axial direction of the cylindrical valve body 862 a in a conical shape.
  • valve outlet 862 b may be formed to be opened in a rectangular shape as one end of the valve body 862 a narrows in an axisymmetric manner. That is, one end in the axial direction of the valve body 862 a may be extended while forming inclined faces to be closer to each other, and the extended inclined faces may be gathered to define the rectangular hole.
  • valve outlet 862 b of the present disclosure may be formed inside the direct water inlet 861 c to discharge the water introduced in the forward direction, and may block flow of the water flowing backward in the reverse direction.
  • the coupling support hook 862 c may be formed to extend radially outward from the other end of the valve body 862 a and may be supported in contact with the connector main body 861 .
  • the coupling support hook 862 c may be formed to protrude radially outward from the other end of the valve body 862 a, and may protrude in a shape of a hook along the circumferential direction.
  • the coupling support hook 862 c of the present disclosure may be hooked and supported on an end in the direction in which the fluid is introduced (an end opposite to the outlet 861 a ) of the direct water inlet 861 c. Accordingly, the connector backflow-preventing valve 862 may be supported even when an inflow pressure of the fluid is large.
  • the coupling protrusion 862 d may protrude from the outer circumferential face of the valve body 862 a along the circumferential direction, and may be in contact with the inner circumferential face of the direct water inlet 861 c.
  • the coupling protrusion 862 d may include two protrusions protruding from the outer circumferential face of the valve body 862 a along the circumferential direction in a rib shape.
  • the coupling protrusion 862 d of the present disclosure may be supported in contact with the inner circumferential face of the direct water inlet 861 c, and deviation of the connector backflow-preventing valve 862 from the connector main body 861 by the pressure of the fluid may be prevented.
  • the direct water pipe 84 may be composed of the first direct water pipe 84 a and the second direct water pipe 84 b, and only one direct water check valve 87 a may be placed between the first direct water pipe 84 a and the second direct water pipe 84 b.
  • the assemblability and the space efficiency may be improved to improve production and repair efficiencies.
  • check valve may be installed by only replacing a connector on an existing pipe.

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  • Textile Engineering (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)
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KR20070078329A (ko) * 2006-01-26 2007-07-31 엘지전자 주식회사 스팀발생장치 및 이를 이용한 세탁기
KR101265618B1 (ko) * 2006-07-28 2013-05-22 엘지전자 주식회사 건조기
KR20080107787A (ko) * 2007-06-08 2008-12-11 엘지전자 주식회사 의류처리장치 및 이의 제어방법
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