JP4056444B2 - Drum washing machine - Google Patents

Description

  The present invention relates to a drum-type washing machine that performs washing, rinsing, and dewatering steps in a rotating drum that is rotatably supported in a direction inclined downward from the front side toward the back side.

  The drum-type washing machine has a bottomed cylindrical rotating drum in which a large number of through-holes for allowing water and air to pass are formed in the peripheral surface, and is arranged in the water tank in a horizontal direction or a direction inclined from the horizontal direction. It is comprised so that a rotation drum can be rotationally driven. The water tank is formed with a clothing doorway that can be opened and closed by a door on the front side thereof, and the laundry is put into the rotating drum from the clothes doorway to control water injection and drainage into the water tank and rotation of the rotating drum. Thus, each step of washing, rinsing and dehydration can be performed.

Many proposals have been made as such a drum type washing machine. For example, a configuration shown in Patent Document 1 is known.
Japanese Patent Laid-Open No. 10-212393 (pages 3 to 4, FIG. 1)

  The drum-type washing machine obtains the main washing effect by tapping by lifting the laundry contained in the rotating drum by the stirring protrusion formed on the inner peripheral wall by rotating the rotating drum and dropping it from an appropriate position. Although the structure is less likely to damage the laundry as compared with the washing machine in which the conventional mainstream rotating drum is arranged in the vertical direction, since the rotating drum is arranged sideways, the laundry is taken in and out from the front side. As a result, the structure has become unsuitable for the pain associated with bending back and the narrow housing situation in Japan. In order to solve the problem of the drum type washing machine, the rotation axis is inclined so that the opening side of the rotating drum faces upward, so that the laundry can be easily put in and out and can be arranged in a narrow space. It can be configured as a drum-type washing machine.

  However, when the rotating drum is tilted from the horizontal direction and placed in the water tank, the drainage from the water tank is done from the lower side on the back side, which is the lowest position, but it is foam after washing while rotating the rotating drum. When the foamed water is drained, there is a problem that the foamed water rises upward on the downward inclined surface of the water tank due to the wind pressure and centrifugal force of the rotating rotating drum, resulting in poor drainage.

  An object of the present invention is to provide a drum type washing machine provided with a drainage structure that suppresses foam water from flowing backward through a sloped surface of drainage during drainage when the rotating drum is inclined in the water tank. .

In order to achieve the above object, the present invention is such that the rotating drum is arranged in a water tank so that the rotation axis of the rotating drum formed in a cylindrical shape is inclined downward from the front side toward the back side. In the drum-type washing machine, a concave drainage groove provided with a plurality of steps so as to gradually increase in depth from the front side to the back side in the rotational axis direction of the rotary drum is provided at a lower portion of the water tank. A drain outlet is formed on the back side of the rotating drum and is open in the axial direction of the rotating drum and drains the washing water in the water tank at the back of the water tank at the deepest part of the drainage groove. It is characterized by being made.

According to the above configuration, the drainage groove formed in the lower part of the water tank is formed in a concave shape so that the depth increases toward the back side, so that the foamed water after washing is drained while rotating the rotating drum. However, due to the multiple steps that increase in depth from the front side to the back side , the foam water is prevented from flowing back upward due to the wind pressure and centrifugal force of the rotating drum that rotates. remaining thus poor drainage occurs in the water tank is prevented, the drain port for draining the washing water in the water tank on the back of the front Symbol aquarium on the back side of the rotary drum, in the axial direction of said rotary drum Since it is open, it is difficult to be affected by the wind pressure from the rotating drum, and an increase in the height of the drainage structure can be suppressed.

  According to the present invention, in the configuration in which the rotating drum is inclined in the water tank so that the laundry can be taken in and out easily, drainage failure does not occur in the drainage of the foamed water after washing. A good drum-type washing machine can be provided.

  FIG. 1 shows a configuration of a drum-type washing machine 1 according to the embodiment. A water tank 3 is suspended in a housing 6 by a suspension structure (not shown), and a bottomed cylindrical shape is formed in the water tank 3. The formed rotating drum 2 is disposed such that its axial direction is inclined downward from the front side to the back side. On the front side of the water tank 3 is formed a clothing doorway 11 leading to the opening end of the rotary drum 2, and a door 9 that closes an opening provided on an upward inclined surface formed on the front side of the housing 6 so as to be openable and closable. By opening, the laundry can be taken in and out of the rotary drum 2 through the clothing entrance 11. Since the door 9 is provided on the upward inclined surface, the work for putting in and out the laundry can be carried out without bending the waist, and generally the workability of the drum type washing machine for taking in and out the laundry from the sideways opening is provided. The evil has been improved.

  The rotary drum 2 is formed with a large number of through holes 8 communicating with the water tank 3 on the peripheral surface thereof, and provided with stirring protrusions 4 at a plurality of positions on the inner peripheral surface. The rotating drum 2 is rotationally driven in the forward and reverse directions by a motor 7 attached to the back side of the water tank 3. In addition, a water injection pipe 12 and a drain pipe 13 are connected to the water tank 3, and water injection and drainage into the water tank 3 are performed by controlling a water injection valve and a drain valve (not shown).

  When the door 9 is opened and laundry and detergent are put into the rotary drum 2 to start the operation of the drum-type washing and drying machine 1, a predetermined amount of water is injected into the water tank 3 from the water injection pipe 12. 7, the rotary drum 2 is rotationally driven to start the washing process. By the rotation of the rotating drum 2, the laundry accommodated in the rotating drum 2 is lifted in the rotating direction by the stirring protrusion 4 provided on the inner peripheral wall of the rotating drum 2, and agitated by dropping from the lifted appropriate height position. Since the operation is repeated, the laundry has the effect of tapping and washing. After the required washing time, the dirty washing liquid is discharged from the drain pipe 13, and the washing liquid contained in the laundry is dehydrated by a dehydrating operation that rotates the rotating drum 2 at a high speed. Rinsing is performed by pouring water from the passage 12. Also in this rinsing step, the laundry stored in the rotary drum 2 is rinsed by repeating the stirring operation of being lifted and dropped by the stirring protrusion 4 by the rotation of the rotary drum 2.

  As shown in FIG. 2, a drainage groove 10 formed in a concave shape toward the axial center direction of the rotating drum 2 is provided at the lower portion of the water tank 3 in the above configuration. In the axial direction of the drainage groove 10, as shown in FIG. 1, a plurality of steps are provided so that the depth of the groove increases stepwise toward the back side. Further, drainage that opens in the axial direction of the rotary drum 2 at the back surface of the deepest rotary drum 2 that is an end portion in the formation direction (axial direction) of the drainage groove 10 and that leads to the drainage pipe 13. A mouth 36 is formed.

As shown in FIG. 2, a drainage groove 10 formed in a concave shape toward the axial center direction of the rotating drum 2 is provided at the lower part of the water tank 3 in the above configuration. In the axial direction of the drainage groove 10, as shown in FIG. 1, a step is provided so that the depth of the groove increases stepwise toward the back side. Further, drainage that opens in the axial direction of the rotary drum 2 at the back surface of the deepest rotary drum 2 that is an end portion in the formation direction (axial direction) of the drainage groove 10 and that leads to the drainage pipe 13. A mouth 36 is formed.

When the drainage groove 10 is formed as in the above configuration, the washing water is drained from the water tank 3 after the end of the washing process, and when the rotating drum 2 is rotated to dehydrate the washing water contained in the laundry, The foam water which was the foam of the washing water discharged into the drainage groove 10 rises up the drainage groove 10 due to the wind pressure and centrifugal force of the rotating drum 2 and becomes difficult to drain, and the washing water and the foam are filled between the rotating drum 2 and the aquarium 3. In addition, it is possible to prevent a problem that it becomes a resistance and a dehydration failure occurs. That is, the step formed in the drainage groove 10 becomes resistance of the foam water that tries to flow back through the drainage groove 10, so that the backflow of foam water is suppressed as shown by the arrow in FIG. 10 is smoothly discharged from the drain port 36 in the drain direction.

  According to the present invention, in order to solve the poor workability of the drum-type washing machine for taking in and out the laundry from the front side and the problems that are not suitable for the Japanese residential environment, the laundry is arranged with the rotating drum inclined in the water tank. Since the problem of causing poor drainage in the drainage of foam water after washing can be solved, a drum type washing machine with good workability can be provided even if it is a drum type.

Sectional drawing which shows the principal part structure of the drum type washing machine which concerns on embodiment. Sectional drawing which shows the formation position of the drain groove formed in the water tank.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum type washing machine 2 Rotating drum 3 Water tank 10 Drain groove 13 Drain pipe 36 Drain port

Claims (1)

In the drum type washing machine in which the rotating drum is disposed in the water tank so that the rotation axis of the rotating drum formed in a cylindrical shape is inclined downward from the front side to the back side.
A concave drainage groove having a step is formed in the lower part of the water tank so that the depth increases stepwise from the front side to the back side in the direction of the rotation axis of the rotary drum. On the side, a drainage port is provided at the back of the water tank at the deepest part of the drainage groove so as to open in the axial direction of the rotating drum and drain the washing water in the water tank. Drum type washing machine.

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