JP2005137886A - Drum washing machine with water level sensor - Google Patents

Drum washing machine with water level sensor Download PDF

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Publication number
JP2005137886A
JP2005137886A JP2004222124A JP2004222124A JP2005137886A JP 2005137886 A JP2005137886 A JP 2005137886A JP 2004222124 A JP2004222124 A JP 2004222124A JP 2004222124 A JP2004222124 A JP 2004222124A JP 2005137886 A JP2005137886 A JP 2005137886A
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Prior art keywords
water level
water
washing machine
drum washing
machine according
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Japanese (ja)
Inventor
Jae-Myong Kim
在明 金
Young Hoon Roh
炯勳 盧
Kisai Lee
揆彩 李
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/087Water level measuring or regulating devices
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08Liquid supply or discharge arrangements
    • D06F39/083Liquid discharge or recirculation arrangements
    • D06F39/085Arrangements or adaptations of pumps
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F2103/00Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
    • D06F2103/18Washing liquid level
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F33/00Control of operations performed in washing machines or washer-dryers 
    • D06F33/30Control of washing machines characterised by the purpose or target of the control 
    • D06F33/47Responding to irregular working conditions, e.g. malfunctioning of pumps 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drum washing machine with a water level sensor preventing abrasion and breakage of a water level sensing hose by vibration, precisely measuring the water level and preventing the clogging of the water level sensing hose with foreign matter. <P>SOLUTION: This drum washing machine includes a water tank storing water, and the water level sensor for measuring the water level in the water tank; and the water level sensor includes the water level sensing hose communicating with the water tank, and a water level sensor sensing the pressure in the water level sensing hose. This drum washing machine is characterized in that the water level sensing hose is provided separately from the water tank. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、ドラム洗濯機に関し、さらに詳細には、振動による摩耗と破損を防止し、毛羽などの異物による詰まりを防止できる水位感知装置に関する。   The present invention relates to a drum washing machine, and more particularly, to a water level sensing device that can prevent wear and breakage due to vibration and prevent clogging due to foreign matters such as fluff.

一般に、ドラム洗濯機は、キャビネットと、該キャビネットの一面に開閉自在に取り付けられたドアと、該ドアに向かって開口するドラム形状の水槽と、該水槽内に回転自在に装着される回転槽と、該回転槽を駆動する駆動モータと、を含んで構成される。   In general, a drum washing machine includes a cabinet, a door attached to one side of the cabinet so as to be openable and closable, a drum-shaped water tank that opens toward the door, and a rotary tub that is rotatably mounted in the water tank. And a drive motor for driving the rotating tub.

衣類などの洗濯物は前記回転槽内において洗濯され、洗濯に必要な水は前記水槽を通して供給される。また、この水槽に適正量の水を供給するべく水位を測定する水位感知装置が設けられる。   Laundry such as clothes is washed in the rotating tub, and water necessary for washing is supplied through the tub. Further, a water level sensing device is provided for measuring the water level so as to supply an appropriate amount of water to the water tank.

従来のドラム洗濯機の水位感知装置は、下記の特許文献1に開示されているように、水位感知装置の水位感知ホースが水槽側に連結されているが、この水槽は駆動モータにより激しく振動され、この振動から前記水槽に連結されている水位感知ホースが摩耗または破損してしまうという問題点があった。
大韓民国特許公開公報第1999−0051584号
In a conventional water level sensing device for a drum washing machine, as disclosed in Patent Document 1 below, the water level sensing hose of the water level sensing device is connected to the water tank side. This water tank is vibrated violently by a drive motor. There is a problem that the water level detection hose connected to the water tank is worn or damaged by this vibration.
Korean Patent Publication No. 1999-0051584

本発明は、上記の問題点に鑑みてなされたものであり、振動による水位感知ホースの摩耗と破損を防止し、さらには正確な水位測定が可能で、水位感知ホースが異物により詰まるのを防止できる水位感知装置付きドラム洗濯機を提供することにその目的がある。   The present invention has been made in view of the above problems, and prevents wear and breakage of the water level detection hose due to vibration, and further enables accurate water level measurement and prevents the water level detection hose from being clogged with foreign matter. The object is to provide a drum washing machine with a water level sensing device.

上記の目的を達成するべく、本発明に係るドラム洗濯機は、水が貯留される水槽と、前記水槽内の水位を測定するための水位感知装置と、前記水槽内の水を排水するための排水ポンプと、を含み、前記水位感知装置は前記排水ポンプの所定の部分に連結されることを特徴とする。   In order to achieve the above object, a drum washing machine according to the present invention includes a water tank in which water is stored, a water level sensing device for measuring the water level in the water tank, and a drain for draining the water in the water tank. A drainage pump, wherein the water level sensing device is connected to a predetermined part of the drainage pump.

また、前記水位感知装置は、前記排水ポンプの所定の部分に連結されて前記水槽と連通する水位感知ホースと、前記水位感知ホース内の圧力を感知する水位感知センサーと、を含み、前記水位感知ホースは、前記排水ポンプの吸入管測に連結されることを特徴とする。   The water level sensing device includes a water level sensing hose connected to a predetermined portion of the drainage pump and communicating with the water tank, and a water level sensing sensor for sensing a pressure in the water level sensing hose, and the water level sensing. The hose is connected to a suction pipe of the drainage pump.

また、前記水位感知センサーは前記水位感知ホースの上端部に設置され、前記水位感知ホースは、下部に設けられる拡管部と、前記拡管部と前記水位感知センサーとの間に設けられる狭管部とを含み、前記拡管部は、前記狭管部よりも大きい径を持つとともに、10cm以上の長さを有することを特徴とする。   Further, the water level detection sensor is installed at an upper end of the water level detection hose, the water level detection hose includes a pipe expansion part provided at a lower part, and a narrow pipe part provided between the pipe expansion part and the water level detection sensor. The expanded tube portion has a diameter larger than that of the narrow tube portion and a length of 10 cm or more.

上記の目的を達成するべく、本発明に係るドラム洗濯機は、キャビネットと、前記キャビネット内に設置されて水を貯留する水槽と、前記水槽と連通し、前記キャビネットに固定支持される固定部材と、前記水槽内の水位を測定するための水位感知装置と、を含み、前記水位感知装置は、前記固定部材に連結されて前記水槽と連通する水位感知ホースと、前記水位感知ホース内の圧力を感知する水位感知センサーと、を含むことを特徴とする。
前記固定部材は、前記水槽内の水を強制排水するための排水ポンプであることを特徴とする。
また、前記水位感知ホースは、前記排水ポンプの吸入管側に連結されることを特徴とする。
In order to achieve the above object, a drum washing machine according to the present invention includes a cabinet, a water tank that is installed in the cabinet and stores water, a fixing member that communicates with the water tank and is fixedly supported by the cabinet. A water level sensing device for measuring the water level in the water tank, the water level sensing device being connected to the fixing member and communicating with the water tank, and a pressure in the water level sensing hose. And a water level sensor for sensing.
The fixing member is a drainage pump for forcibly draining water in the water tank.
The water level detection hose is connected to the suction pipe side of the drainage pump.

上述した如く、本発明に係るドラム洗濯機の水位感知装置は、水位感知ホースが、キャビネット側に固定された排水ポンプ側に連結されているために振動による摩耗と破損が防止され、また、前記水位感知ホースは上部に比べて径の大きい拡管部を備えているために正確な水位測定が可能で、毛羽などの異物によるホース詰まりから起こる水位感知装置の誤作動を防げる効果がある。   As described above, the water level detecting device of the drum washing machine according to the present invention prevents wear and breakage due to vibration because the water level detecting hose is connected to the drain pump side fixed to the cabinet side, and Since the water level detection hose has an expanded portion having a diameter larger than that of the upper part, it is possible to accurately measure the water level and to prevent malfunction of the water level detection device caused by clogging of the hose due to foreign matters such as fluff.

以下、本発明の好ましい実施の形態を添付図面を参照しつつ詳細に説明する。図面中、同一の構成要素には可能な限り同一の参照符号及び番号を付けるものとする。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same components are denoted by the same reference numerals and numerals as much as possible.

図1において、本発明の一実施の形態によるドラム洗濯機100は、キャビネット10と、該キャビネット10の一面に開閉自在に取り付けられるドア11と、該ドア11に向かって開口するドラム形状の水槽20と、該水槽20内に回転自在に取り付けられる回転槽21と、該回転槽21を駆動する駆動モータ22と、を含んで構成される。   In FIG. 1, a drum washing machine 100 according to an embodiment of the present invention includes a cabinet 10, a door 11 that can be freely opened and closed on one surface of the cabinet 10, and a drum-shaped water tank 20 that opens toward the door 11. And a rotating tank 21 that is rotatably mounted in the water tank 20 and a drive motor 22 that drives the rotating tank 21.

前記回転槽21の側壁には、前記回転槽21が回転する際に洗濯物を上に持ち上げるためのリフター25と、前記水槽20から供給される洗濯に必要な水が通る複数の穴26とが形成される。   On the side wall of the rotating tub 21, there are a lifter 25 for lifting the laundry upward when the rotating tub 21 rotates and a plurality of holes 26 through which water required for washing supplied from the water tub 20 passes. It is formed.

前記水槽20と前記回転槽21は、同一の軸を中心軸として配置され、その中心軸上に前記駆動モータ22が配設される。   The water tank 20 and the rotary tank 21 are arranged with the same axis as a central axis, and the drive motor 22 is arranged on the central axis.

前記キャビネット10内の上部には、前記水槽20に水を供給するための給水管30と、前記ドア11の上側に位置して前記給水管30と連結される洗剤容器33と、が備えられる。   A water supply pipe 30 for supplying water to the water tank 20 and a detergent container 33 that is located on the upper side of the door 11 and connected to the water supply pipe 30 are provided in the upper part of the cabinet 10.

前記水槽20の上部には前記給水管30の一端部が連結される給水口23が形成され、前記水槽20の下部には前記水槽20に貯留する水を排水するための排水口24が形成される。   A water supply port 23 to which one end of the water supply pipe 30 is connected is formed in the upper part of the water tank 20, and a water discharge port 24 for discharging water stored in the water tank 20 is formed in the lower part of the water tank 20. The

前記キャビネット10の底面には前記水槽20に貯留している水を強制排水するための排水ポンプ40が固定され、排水ポンプ40の所定の部分には水槽20内の水を吸い込む吸入管41と、吸い込まれた水を吐出す吐出管42とが備えられる。そして第1排水管31は、前記水槽20の排水口24と前記吸入管41とを連結し、第2排水管32は、一端が前記吐出管42に連結され、他端は前記キャビネット10の外部へ延設される。   A drainage pump 40 for forcibly draining water stored in the water tank 20 is fixed to the bottom surface of the cabinet 10, and a predetermined portion of the drainage pump 40 has a suction pipe 41 for sucking water in the water tank 20, And a discharge pipe 42 for discharging the sucked water. The first drain pipe 31 connects the drain port 24 of the water tank 20 and the suction pipe 41, and the second drain pipe 32 has one end connected to the discharge pipe 42 and the other end connected to the outside of the cabinet 10. It is extended to.

一方、ドラム洗濯機100は、前記水槽20に貯留する水の高さを測定するための水位感知装置50をさらに含み、該水位感知装置50は、下端部が前記排水ポンプ40の吸入管41に連結される水位感知ホース51と、前記水位感知ホース51の上端部に設置されて前記水位感知ホース51内の空気圧力を測定する水位感知センサー54と、を含む。前記水位感知ホース51は、上端に前記水位感知センサー54が取り付けられる狭管部52と、該狭管部52の下端に連結され、前記狭管部52に比べて径の大きい拡管部53と、を含む。   Meanwhile, the drum washing machine 100 further includes a water level sensing device 50 for measuring the height of the water stored in the water tank 20, and the lower end of the water level sensing device 50 is connected to the suction pipe 41 of the drainage pump 40. A water level detection hose 51 connected to the water level detection hose 51; and a water level detection sensor 54 installed at an upper end of the water level detection hose 51 to measure an air pressure in the water level detection hose 51. The water level detection hose 51 is connected to a narrow tube portion 52 to which the water level detection sensor 54 is attached at an upper end, and to a lower end of the narrow tube portion 52, and a tube expansion portion 53 having a diameter larger than that of the narrow tube portion 52; including.

以下、本発明の一実施の形態による、水位感知装置50付きドラム洗濯機100の動作について説明する。   Hereinafter, the operation of the drum washing machine 100 with the water level sensing device 50 according to the embodiment of the present invention will be described.

衣類などの洗濯物は、駆動モータ22により回転する回転槽21内において洗濯される。回転槽21が回転する際、前記回転槽21の側壁に取り付けられたリフター25が洗濯物を前記回転槽21の上に持ち上げては落しつつ衝撃力と洗濯物間の摩擦力を生じさせ、これらの力により洗濯が行われる。   Laundry such as clothes is washed in a rotating tub 21 rotated by a drive motor 22. When the rotating tub 21 rotates, a lifter 25 attached to the side wall of the rotating tub 21 lifts and drops the laundry on the rotating tub 21 and generates an impact force and a frictional force between the laundry. Washing is performed by the power of.

洗濯に必要な水は給水管30を通して供給され、この給水管30は洗剤容器33に連結されているため、洗濯に必要な洗剤を水に溶解した状態で供給するようになる。また、水槽20に適正量の水を供給するために前記水位感知装置50を用いて前記回転槽21内の水位を測定する。   The water necessary for washing is supplied through the water supply pipe 30. Since the water supply pipe 30 is connected to the detergent container 33, the detergent necessary for washing is supplied in a state dissolved in water. Further, in order to supply an appropriate amount of water to the water tank 20, the water level in the rotating tank 21 is measured using the water level sensing device 50.

前記水位感知装置50の水位感知ホース51下部の拡管部53は、前記排水ポンプ40の吸入管41と前記第1排水管31とを介して前記水槽20の下部に連通しているため、前記水槽20に水が満たされてゆくにつれて前記拡管部53の水位も一緒に上がる。この拡管部53の水位が次第に上がるにつれて水位感知ホース51内の空気が圧縮されて圧力が増加することになり、この圧力変化を水位感知センサー54で感知することによって前記水槽20の水位を測定することになる。   The expanded portion 53 below the water level sensing hose 51 of the water level sensing device 50 communicates with the lower portion of the water tank 20 through the suction pipe 41 and the first drain pipe 31 of the drain pump 40, so that the water tank As the water 20 is filled with water, the water level of the expanded portion 53 rises together. As the water level in the expanded pipe 53 gradually rises, the air in the water level detection hose 51 is compressed and the pressure increases. By detecting this pressure change with the water level detection sensor 54, the water level of the water tank 20 is measured. It will be.

一方、前記水位感知ホース51の下端部は、従来水槽20側に連結されていたのとは違い、キャビネット10に固定されている前記排水ポンプ40の吸入管41側に連結されているため、駆動モータ22による振動の影響を受けなくなる。   On the other hand, the lower end portion of the water level detection hose 51 is connected to the suction pipe 41 side of the drainage pump 40 fixed to the cabinet 10 unlike the conventional water tank 20 side. The motor 22 is not affected by vibrations.

そして、前記水位感知ホース51は、その下部に径の大きい拡管部53を持つため、均一の径を有する場合に比べて、同じ水位変化に対する圧力変化量が大きく、したがって、正確な水位感知が可能となる。   Since the water level detection hose 51 has a large-diameter pipe expanding portion 53 at the lower part thereof, the amount of pressure change with respect to the same water level change is larger than when the water level detection hose 51 has a uniform diameter, and therefore accurate water level detection is possible. It becomes.

前記拡管部53の水面には圧縮された空気の圧力が働いていることから、大気圧が働いている水槽20の水面に比べて低く保たれるが、たとえ水槽20内の水位が最大レベルに到達した時でもこの拡管部53内の水位が狭管部52まで到達しないようにこの拡管部53の長さを十分長くすると、前記狭管部52に毛羽などの異物が詰まって水位感知装置50が誤作動を起こしたりするのを防ぐことができる。このため、拡管部53の長さは10cm以上のものが好ましい。   Since the compressed air pressure works on the water surface of the expanded pipe portion 53, it is kept lower than the water surface of the water tank 20 where the atmospheric pressure is working, even if the water level in the water tank 20 is at the maximum level. If the length of the expanded tube portion 53 is sufficiently long so that the water level in the expanded tube portion 53 does not reach the narrow tube portion 52 even when it reaches, the narrow tube portion 52 is clogged with foreign matter such as fluff and the water level sensing device 50. Can be prevented from malfunctioning. For this reason, the length of the expanded pipe portion 53 is preferably 10 cm or more.

本発明の好ましい一実施の形態によるドラム洗濯機を示す側面断面図である。1 is a side sectional view showing a drum washing machine according to a preferred embodiment of the present invention. 図1のドラム洗濯機の排水ポンプに連結された水位感知装置を示す斜視図である。It is a perspective view which shows the water level detection apparatus connected with the drainage pump of the drum washing machine of FIG. 図1のドラム洗濯機の水位感知装置を示す側面図である。It is a side view which shows the water level detection apparatus of the drum washing machine of FIG.

符号の説明Explanation of symbols

10 キャビネット
20 水槽
24 排水口
31 第1排水管
32 第2排水管
40 排水ポンプ
41 吸入管
42 吐出管
50 水位感知装置
51 水位感知ホース
52 狭管部
53 拡管部
54 水位感知センサー
100 ドラム洗濯機

DESCRIPTION OF SYMBOLS 10 Cabinet 20 Water tank 24 Drain outlet 31 1st drain pipe 32 2nd drain pipe 40 Drain pump 41 Intake pipe 42 Discharge pipe 50 Water level detection device 51 Water level detection hose 52 Narrow pipe part 53 Expanded part 54 Water level detection sensor 100 Drum washing machine

Claims (16)

水を貯留する水槽と、
前記水槽内の水位を測定するための水位感知装置と、
前記水槽内の水を排水するための排水ポンプと、を含み、
前記水位感知装置は前記排水ポンプの所定の部分に連結されることを特徴とするドラム洗濯機。
A water tank for storing water;
A water level sensing device for measuring the water level in the water tank;
A drainage pump for draining water in the aquarium,
The drum washing machine according to claim 1, wherein the water level sensing device is connected to a predetermined portion of the drainage pump.
前記水位感知装置は、
前記排水ポンプの所定の部分に連結されて前記水槽と連通する水位感知ホースと、
前記水位感知ホース内の圧力を感知する水位感知センサーと、を含むことを特徴とする請求項1に記載のドラム洗濯機。
The water level sensing device is
A water level detection hose connected to a predetermined portion of the drainage pump and communicating with the water tank;
The drum washing machine according to claim 1, further comprising: a water level detection sensor that detects pressure in the water level detection hose.
前記水位感知ホースは、前記排水ポンプの吸入管測に連結されることを特徴とする請求項2に記載のドラム洗濯機。   The drum washing machine according to claim 2, wherein the water level detection hose is connected to a suction pipe of the drain pump. 前記水位感知ホースの下部は、前記水位感知ホースの上部よりも大きい径を有することを特徴とする請求項3に記載のドラム洗濯機。   The drum washing machine according to claim 3, wherein a lower portion of the water level detection hose has a larger diameter than an upper portion of the water level detection hose. 前記水位感知ホースは、下部に設けられる拡管部と、前記拡管部と前記水位感知センサーとの間に設けられる狭管部と、を含むことを特徴とする請求項4に記載のドラム洗濯機。   5. The drum washing machine according to claim 4, wherein the water level detection hose includes a pipe expansion part provided at a lower part and a narrow pipe part provided between the pipe expansion part and the water level detection sensor. 前記拡管部は、10cm以上の長さを有することを特徴とする請求項5に記載のドラム洗濯機。   The drum washing machine according to claim 5, wherein the pipe expanding portion has a length of 10 cm or more. キャビネットと、
前記キャビネット内に設置されて水を貯留する水槽と、
前記水槽と連通し、前記キャビネットに固定支持される固定部材と、
前記水槽内の水位を測定するための水位感知装置と、を含み、
前記水位感知装置は、前記固定部材に連結されて前記水槽と連通する水位感知ホースと、前記水位感知ホース内の圧力を感知する水位感知センサーと、を含むことを特徴とするドラム洗濯機。
Cabinet,
A water tank installed in the cabinet for storing water;
A fixing member that communicates with the water tank and is fixedly supported by the cabinet;
A water level sensing device for measuring the water level in the water tank,
2. The drum washing machine according to claim 1, wherein the water level sensing device includes a water level sensing hose connected to the fixing member and communicating with the water tank, and a water level sensing sensor for sensing pressure in the water level sensing hose.
前記固定部材は、前記水槽内の水を強制排水するための排水ポンプであることを特徴とする請求項7に記載のドラム洗濯機。   The drum washing machine according to claim 7, wherein the fixing member is a drainage pump for forcibly draining water in the water tank. 前記水位感知ホースは、前記排水ポンプの吸入管側に連結されることを特徴とする請求項8に記載のドラム洗濯機。   The drum washing machine according to claim 8, wherein the water level detection hose is connected to a suction pipe side of the drainage pump. 前記水位感知装置は、前記固定部材の所定の部分に連結されて水位感知ホースがドラム洗濯機の駆動時の振動により損傷するのを防ぐことを特徴とする請求項7に記載のドラム洗濯機。   8. The drum washing machine as set forth in claim 7, wherein the water level sensing device is connected to a predetermined portion of the fixing member to prevent the water level sensing hose from being damaged by vibration when the drum washing machine is driven. 前記排水ポンプは、前記キャビネットの底面に設けられて前記水槽から水を排水させることを特徴とする請求項9に記載のドラム洗濯機。   The drum washing machine according to claim 9, wherein the drain pump is provided on a bottom surface of the cabinet and drains water from the water tank. 前記排水ポンプの所定の部分に、水槽内の水を吸い込む吸入管と、吸い込まれた水を吐出す吐出管とがさらに備えられることを特徴とする請求項11に記載のドラム洗濯機。   The drum washing machine according to claim 11, further comprising a suction pipe for sucking water in the water tank and a discharge pipe for discharging the sucked water in a predetermined portion of the drainage pump. 前記水槽の排水口と前記吸入管とを連結する第1排水管と、一端が前記吐出管に連結され、他端は前記キャビネットの外部へ延設される第2排水管とがさらに備えられることを特徴とする請求項12に記載のドラム洗濯機。   A first drain pipe connecting the drain port of the water tank and the suction pipe; and a second drain pipe having one end connected to the discharge pipe and the other end extending to the outside of the cabinet. The drum washing machine according to claim 12. 前記拡管部の水面には圧縮された空気の圧力が働き、この拡管部の水面が前記水槽の水面よりも低く保たれるようにすることを特徴とする請求項5に記載のドラム洗濯機。   6. The drum washing machine according to claim 5, wherein the pressure of compressed air acts on the water surface of the expanded pipe portion so that the water surface of the expanded tube section is kept lower than the water surface of the water tank. 前記拡管部は、前記水槽内の水位が最大レベルに到達した時でもこの拡管部内の水位が前記狭管部まで到達するのを防ぐような所定の長さに形成されることを特徴とする請求項14に記載のドラム洗濯機。   The pipe expansion part is formed to have a predetermined length so as to prevent the water level in the pipe expansion part from reaching the narrow pipe part even when the water level in the water tank reaches a maximum level. Item 15. The drum washing machine according to Item 14. 前記水位感知センサーは、水位感知ホースの上端部に設置されることを特徴とする請求項2に記載のドラム洗濯機。

The drum washing machine according to claim 2, wherein the water level detection sensor is installed at an upper end of the water level detection hose.

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