JP2015223318A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine which solves twisting of laundry and which improves washing performance.SOLUTION: A washing machine includes: a plurality of water flow forming ribs 28 provided on an upper surface of a pulsator 18 in a radially protruding manner; auxiliary ribs 29 provided between the adjacent water flow forming ribs in a radially protruding manner; and control means for controlling a motor 20, a water supply valve 41 and the like and for sequentially controlling a series of steps of washing, rinsing and dewatering. The pulsator 18 forms the auxiliary ribs 29 on the outer peripheral side, forms rotation water flow roller installation parts 30 on the inner peripheral side of the auxiliary ribs 29. In the rotation water flow roller installation part 30, a rotation water flow roller 31 is mounted rotatably in which a plurality of roller ribs 42 are provided in a radially protruding manner on the upper surface. Thus, by a water flow generating from the outer peripheral part of the pulsator 18 and a water flow generating from the central part, laundry is agitated and twisting is prevented, so that washing performance can be improved, and the pulsator 18 becomes cheap and highly reliable in a configuration aspect as well.

Description

  The present invention relates to a washing machine for washing laundry with a pulsator provided on the inner bottom of a washing and dewatering tank.

Conventionally, this type of washing machine has been proposed to efficiently wash laundry by generating a rotating water flow according to the shape of the pulsator (see, for example, Patent Document 1).
FIG. 8 is a plan view of a pulsator of a conventional washing machine described in Patent Document 1, and FIG. 9 is a longitudinal sectional view of the pulsator of the washing machine.

  8 and 9, a cam assembly 121 is installed at the center of the upper surface of the pulsator 120 so as to be able to move up and down in order to cause washing water to flow up and down during washing. A plurality of water flow forming ribs 122 project radially from the center of the upper surface of the pulsator 120 to the outer peripheral portion of the cam assembly 121, and the auxiliary ribs 124 are interposed between the water flow forming ribs 122. Are projected radially one by one.

  A rotation shaft installation hole 136 is formed in the upper surface of the pulsator 120 outside the end portion of the auxiliary rib 124, and the rotation water flow roller 130 is rotated in the rotation shaft installation hole 136 by friction with the washing water flow. It is provided with a shaft.

  With the pulsator having the above configuration, a horizontal water flow and a vertical water flow are generated, and the laundry is rotated in the washing and dewatering tub to perform the washing process.

JP-A-8-309073

  However, in the above-described conventional configuration, the rotating water flow roller is formed outside the end portion of the auxiliary rib, that is, in the vicinity of the outer peripheral portion of the pulsator, so that the centrifugal force due to the rotation of the pulsator acts strongly and the rotation of the rotating roller is also accelerated. . As a result, a strong rising water flow is formed on the outer periphery of the upper surface of the pulsator, but no water flow is formed in the central portion of the upper surface. For this reason, the laundry is twisted in the central portion, and the surface area of the laundry in contact with the water There is a problem that the cleaning performance is reduced due to the decrease in the amount of the slag.

  The present invention solves the above-described conventional problems, and an object of the present invention is to provide a washing machine that improves the cleaning performance.

  In order to solve the above-described conventional problems, the washing machine of the present invention includes a washing / dehydrating tub in which a pulsator is rotatably disposed at a central bottom portion, and a vibration isolating support is provided inside the main body, so that the washing / dehydrating tub is rotatable. A water tank to be included; and a motor that rotationally drives the pulsator and the washing / dehydrating tub. The pulsator includes a plurality of water flow forming ribs radially projecting from an upper surface of the pulsator, and the adjacent water flow forming ribs. Auxiliary ribs projecting radially are provided between them, and a rotating water flow roller is rotatably mounted on the inner peripheral side of the auxiliary ribs.

  As a result, the washing performance can be improved by stirring the laundry and preventing twisting by the water flow generated from the outer peripheral portion of the pulsator and the water flow generated from the central portion, and the structure is inexpensive and highly reliable. It can be a pulsator.

  The washing machine of the present invention can improve washing performance, and can be a pulsator that is inexpensive and highly reliable in terms of construction.

The longitudinal cross-sectional view of the washing machine in embodiment of this invention Top view of the washing machine pulsator Vertical section of pulsator of the washing machine Top view of the pulsator of the washing machine before installation of the rotating water roller Longitudinal sectional view of the pulsator of the washing machine before installation of the rotating water roller (A) Enlarged plan view of the rotating water flow roller of the washing machine, (b) Enlarged longitudinal sectional view of the rotating water flow roller The figure explaining the water flow at the time of pulsator rotation of the washing machine Top view of conventional washing machine pulsator Vertical section of pulsator of the washing machine

  According to a first aspect of the present invention, there is provided a washing / dehydrating tub in which a pulsator is rotatably disposed at the center bottom, a water tub that is supported in an anti-vibration manner inside the main body and rotatably includes the washing / dehydrating tub, the pulsator, A motor for rotating the dewatering tank, and the pulsator includes a plurality of water flow forming ribs projecting radially on the upper surface of the pulsator, and auxiliary ribs projecting radially between the adjacent water flow forming ribs And a rotating water flow roller is rotatably mounted on the inner peripheral side of the auxiliary rib.

  As a result, the washing performance can be improved by agitating the laundry by the water flow generated from the outer peripheral portion of the pulsator and the water flow generated from the central portion to prevent twisting, and the structure is inexpensive and reliable. High pulsator.

  According to a second aspect, in the first aspect, a plurality of roller ribs project radially from the upper surface of the rotating water flow roller.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Further, the present invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention.

  In FIG. 1, a main body 11 supports a water tank 13 by a plurality of suspensions 12 in a suspension and vibration-proof manner. The washing / dehydrating shaft 14 is hollow and has a biaxial structure. The washing and dewatering tub 15 has a number of dewatering holes (not shown) on the side wall, a fluid balancer 17 for vibration reduction at the upper part of the inner periphery, and a pulsator 18 for clothes stirring at the center inner bottom. It is installed.

  The transmission mechanism 19 includes a reduction gear (not shown) during washing and a switching clutch (not shown) for the washing / dehydrating shaft 14 and a brake (not shown) for stopping the washing / dehydrating tub 15 during dehydration. Built-in).

  The motor 20 is attached to the outer bottom of the water tank 13, transmits its power to the washing / dehydrating shaft 14, and rotates the pulsator 18 and the washing / dehydrating tank 15.

  An upper frame 24 is disposed on the upper portion of the main body 11, and a laundry input / exit 25 for communicating the washing and dewatering tub 15 and the outside is formed at a substantially central portion of the upper frame 24, and the laundry The input / output port 25 is covered with a lid 26 so as to be freely opened and closed.

  In the front part of the upper frame 24, an operation display unit 43 for performing various input settings and displaying the setting contents is disposed. Inside the operation display unit 43 is disposed a control device 27 having control means (not shown) for controlling the motor 20 and the like, and sequentially controlling a series of steps of washing, rinsing and dehydration. Is provided with a water supply valve 41 that can be opened and closed by electromagnetic force.

  2 is a plan view of the pulsator of the washing machine according to the embodiment of the present invention, FIG. 3 is a longitudinal sectional view of the pulsator, FIG. 4 is a plan view of the pulsator before the rotating water flow roller is mounted, and FIG. FIG. 6A is an enlarged plan view of the rotating water flow roller of the pulsator, FIG. 6A is an enlarged plan view of the rotating water flow roller of the pulsator, and FIG.

  2, 3, 4, 5, 6 (a) and 6 (b), the pulsator 18 projects a plurality of water flow forming ribs 28 radially from the center of the upper surface toward the outer periphery. . On the outer peripheral side between the water flow forming ribs 28, auxiliary ribs 29 that protrude radially and whose height is lower than the water flow forming ribs 28 and shorter than the water flow forming ribs 28 are provided. A rotating water roller installation portion 30 is provided in the vicinity of the center portion of the pulsator 18 on the inner peripheral side of the end portion of the auxiliary rib 29.

  In the rotating water roller installation portion 30, an installation hole 40 is formed at the center, a plurality of protrusions 34 are formed on the outer periphery, and a cylindrical rib 33 is provided upright at the edge of the installation hole 40 on the back surface.

  The rotating water roller installation section 30 is provided with a rotating water roller 31 having a plurality of roller ribs 42 projecting radially on its upper surface. The rotating water roller 31 is mounted on the rotating water roller installing portion 30 by engaging an engaging claw 32 provided on the back surface with a cylindrical rib 33 of the rotating water roller installing portion 30. The plurality of protrusions 34 on the surface side of the rotating water roller installation portion 30 are for rotating with reduced friction with the lower surface of the rotating water roller 31. The rotating water roller 31 is configured to be lower than the auxiliary rib 29 in the mounted state.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  FIG. 7 is a water flow diagram during rotation of the pulsator of the washing machine in the embodiment of the present invention.

  After the user puts laundry and detergent into the washing and dewatering tub 15 and selects an operation course on the operation display unit 43 and turns on a start switch (not shown), the control means turns on the water supply valve 41. Open and supply water to the washing and dewatering tub 15. When water is supplied to a predetermined water level, the water supply is stopped, the motor 20 is rotated, the power is transmitted to the pulsator 18 via the washing / dehydrating shaft 14, and the washing process is started.

  When the pulsator 18 rotates forward and backward, a strong water flow 35 is generated by the water flow forming ribs 28 provided on the upper surface of the pulsator 18. The water flow 35 rises along the inner wall surface of the washing / dehydrating tub 15, and the laundry rises on the rising water flow 35 on the inner wall surface side while rotating in the circumferential direction as the pulsator 18 rotates. The pulsator 18 is flowed to the center.

At this time, the rotating water flow roller 31 provided near the center of the pulsator 18 rotates while revolving with the rotation of the pulsator 18. Roller ribs 42 provided on the upper surface of the rotating water roller 31
As a result, the rising water flow 36 is generated in the central portion of the pulsator 18, and the force to flow to the central portion of the pulsator 18 by the water flow forming rib 28 is reduced.

  That is, the twist of the laundry falling after the generation of the rising water flow 35 at the water flow forming rib 28 is eliminated by the generation of the rising water flow 36 due to the rotation of the rotating water flow roller 31, and the twist is eliminated to contact the water flow. The surface area of the laundry can be increased, thereby improving the cleaning performance.

  As described above, in the present embodiment, the pulsator 18 has the auxiliary rib 29 formed on the outer peripheral side, the rotating water roller installation portion 30 formed on the inner peripheral side of the auxiliary rib 29, and the rotating water roller installation portion. A rotating water flow roller 31 having a plurality of radial roller ribs 42 protruding from the upper surface is rotatably mounted on 30. Thereby, the water flow generated from the outer peripheral portion of the pulsator 18 and the water flow generated from the central portion can stir the laundry to prevent twisting, improve the cleaning performance, and are inexpensive and reliable in terms of configuration. High washing machine.

  As described above, the washing machine according to the present invention can be applied to other washing machines having a pulsator because it can eliminate the twist of the laundry and improve the washing performance with a simple pulsator configuration. .

DESCRIPTION OF SYMBOLS 11 Main body 13 Water tank 15 Washing and dewatering tank 18 Pulsator 20 Motor 24 Upper frame 28 Water flow formation rib 29 Auxiliary rib 30 Rotating water flow roller installation part 31 Rotating water flow roller 41 Water supply valve 42 Roller rib

Claims (2)

A washing / dehydrating tub with a pulsator rotatably disposed at the center bottom, a water tub that is supported in an anti-vibration manner inside the main body and rotatably encloses the washing / dehydrating tub, and rotates the pulsator and the washing / dehydrating tub The pulsator is provided with a plurality of water flow forming ribs projecting radially on the upper surface of the pulsator, and auxiliary ribs projecting radially between the adjacent water flow forming ribs. A washing machine with a rotating water roller rotatably mounted on the inner periphery of the rib. The washing machine according to claim 1, wherein a plurality of roller ribs project radially from the upper surface of the rotating water roller.

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