JP2017185134A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine capable of increasing the pump flow without large increase in the speed of rotation of a pulsator.SOLUTION: The washing machine in an embodiment includes a water tank, a pulsator rotatably disposed in the water tank, ribs disposed on the underside of the pulsator, having a pumping function, and a water channel through which liquid discharged from the ribs is discharged to a predetermined place in the tank. At the bottom of the ribs, a plate for conducting water is provided to annularly cover the underside of the ribs.SELECTED DRAWING: Figure 3

Description

  Embodiments described herein relate generally to a washing machine.

  Conventionally, in order to create washing circulating water of a washing machine, a technology has been used in which blades (back blades) are provided on the back side of a pulsator and the back blades act as a pump by rotating the pulsator. However, considering the prevention of excessive rise in the winding temperature of the motor that rotates the pulsator, energy saving, low noise performance, etc., it is difficult to increase the pump flow rate by simply increasing the rotational speed of the pulsator. Yes.

JP 2015-29818 A

  Then, it aims at providing the washing machine which can increase a pump flow, without raising the rotation speed of a pulsator largely.

  The washing machine according to the embodiment includes a water tank, a pulsator rotatably provided in the water tank, a back blade provided on a lower surface of the pulsator and having a pump function, and a discharge liquid from the back blade in the water tank. And a water guide plate that annularly covers the lower surface of the back blade.

The longitudinal cross-sectional view which shows schematic structure of the washing machine which concerns on embodiment Top view showing schematic configuration of pulsator Longitudinal sectional view showing schematic configuration of pulsator and water guide plate Bottom view showing schematic configuration of pulsator and water guide plate Exploded view showing schematic configuration of pulsator and water guide plate Top view showing a variation of the pulsator

  Hereinafter, a washing machine according to an embodiment will be described with reference to the drawings. In the embodiment, substantially the same components are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 1 is a side sectional view showing a schematic configuration of a washing machine 100 according to the embodiment. A main body 1 that forms an outline of the washing machine 100 includes an outer box 2 that has a substantially rectangular box shape, and a top cover 3 that is attached to the upper surface of the outer box 2. The top cover 3 is provided with a double-folded lid 5 that opens and closes the laundry inlet 4 so as to be rotatable. A water tank 6 is provided inside the main body 1. The water tank 6 is formed in a bottomed cylindrical shape having an opening on the upper side and a water tank bottom on the lower side. The water tank 6 is elastically supported by an elastic support mechanism 7.

  A rotating tank 8 is rotatably provided inside the water tank 6. The rotary tank 8 is formed in a bottomed cylindrical shape having an opening on the upper side and a rotary tank bottom on the lower side. A pulsator 9 for washing and rinsing is rotatably provided in the inner and lower part of the rotating tank 8. A number of through holes 10 for dehydration are formed in the peripheral wall portion of the rotating tub 8, and a balancer 11 filled with, for example, a liquid is provided at the upper end portion.

  On the outer bottom surface side of the water tank 6, a drive unit 12 including a motor for washing and dehydration, a clutch mechanism for switching power transmission, and the like is disposed. By the clutch mechanism of the drive unit 12, only the pulsator 9 is rotated during the washing operation, and the rotating tub 8 is rotated together with the pulsator 9 during the dehydration operation.

  A drain port 13 is provided at the bottom of the water tank 6. An electric open / close drain valve 14 is connected to the drain port 13. A drain hose 15 is connected to the drain valve 14 and is configured to lead water out of the machine.

  An air trap 16 communicates with the drain port 13. A pressure type water level sensor (not shown) is connected to the air trap 16 via an air tube or the like. Thereby, the water level in the water tank 6 can be detected. An overflow channel 17 formed in communication with the outside of the machine is provided at the upper part of the water tank 6.

  The circulating water channel 19 is provided so as to extend in the vertical direction along the side wall of the rotating tub 8. The rotating tub 8 is provided with a water channel cover 20 that forms a circulating water channel 19 between the rotating tub 8 and the side wall. The lower end of the circulating water channel 19 communicates by opening facing the back side of the pulsator 9.

  The pulsator 9 is provided with a plurality of back blades 18 standing on the back surface thereof integrally with the pulsator 9. The back blade 18 is located in a blade space portion 22 which is a space portion formed in the inner bottom portion of the rotating tub 8, and the blade space portion 22 communicates with the circulation water channel 19 described above. The back blade 18 functions as a pump during the washing operation by rotating integrally with the pulsator 9. The back blade 18 functioning as the pump discharges the wash water sucked from the central portion by the centrifugal force accompanying the rotation of the pulsator 9 in the lateral direction, and the discharged wash water is discharged into the circulation water channel 19 and pushed up to be pumped up. Is done. As will be described later, a water guide plate 40 is disposed below the back blade 18.

  An operation panel 23 is provided at the front portion of the top cover 3. Although not shown, the operation panel 23 is provided with various operation keys and a display unit. A control device 24 is provided on the back side of the operation panel 23. The control device 24 is mainly composed of a microcomputer, and functions as a control means for automatically controlling a process such as a washing operation and a dehydration operation based on operation of an operation key and a control program provided in advance. .

  FIG. 2 is a top view of the pulsator 9. The pulsator 9 is made of a synthetic resin as a whole, and has a base 30 having a circular planar shape as a base, a central convex portion 31 provided at the central portion on the base 30, and the central convex portion on the base 30. A plurality of blade portions 32 projecting radially from the center 31, and a plurality of back blades 18 provided radially on the bottom surface of the base 30, similar to the blade portions 32. It is prepared as one.

  A boss portion 33 is integrally provided at the center of the back surface side of the central convex portion 31, and the upper end of the drive shaft 12 a of the motor 12 is fitted into the concave portion 35 that is the rotation center 25 of the pulsator 9. The pulsator 9 and the drive shaft 12a are attached so as to rotate integrally. FIG. 2 shows an embodiment in which three blade portions 32 are formed on the upper surface of the base 30, and these three blade portions 32 are arranged radially at equal intervals around the central convex portion 31. Is arranged.

  As seen from above, each blade portion 32 extends in the radial direction from the rotation center 25 toward the outer side, and is convex in any one direction in the clockwise direction or the counterclockwise direction. It is composed of a slightly curved curve. In FIG. 2, the example comprised by the curve slightly curved so that it may become convex in a counterclockwise direction is shown.

  A plurality of holes 34 penetrating in the vertical direction and allowing water to pass therethrough are formed in the base 30 and the central protrusion 31 of the pulsator 9. The plurality of holes 34 provided on the base 30 are arranged in a curved manner in the same direction as the blades 32 when viewed from above. FIG. 2 shows an example in which the radial intermediate portion is arranged slightly curved so as to be convex in the counterclockwise direction.

  FIG. 3 is a view showing the pulsator 9 and the back blade 18 and the water guide plate 40 fixedly disposed below the pulsator 9 and the back blade 18. FIG. 4 is a bottom view of FIG. FIG. 5 is an exploded view of the pulsator 9 and the water guide plate 40. As described above, the water guide plate 40 is provided on the lower surface of the pulsator 9 so as to be integrally fixed with the rear blade 18. In FIG. 4, eight linear back blades 18 are provided radially from the boss portion 33 at the rotation center 25 of the pulsator 9.

  The water guide plate 40 has an annular disk shape with an opening 44 provided at the center, a first flat plate portion 42a having a flat shape on the opening 44 side, and a second flat plate portion having a flat shape on the outside. 42c. Further, a step portion 42b is provided at an intermediate portion between the first flat plate portion 42a and the second flat plate portion 42c, that is, an intermediate portion in the radial direction of the water guide plate 40. On the other hand, the 1st flat plate part 42a and the 2nd flat plate part 42c from which the height of the water guide plate 40 differs according to the shape are contact | abutted and mounted | worn.

  Thus, in the state where the water guide plate 40 is mounted on the pulsator 9, the water guide plate 40 annularly covers the lower surface of the lower portion of the back blade 18 of the pulsator 9, and thus the blade space 22 is configured between the pulsator 9 and the water guide plate 40. doing. The blade space 22 communicates with the opening 44. In the blade space 22, an area where the average distance from the rear surface of the pulsator 9 to the water guide plate 40, that is, the average vertical dimension is the first distance G 1, is closer to the rotation center 25 than the step 42 b is the first blade space 22 a To do. In the blade | wing space part 22, the area | region which is an outer side rather than the step part 42b, Comprising: The average distance from the pulsator 9 back surface to the water guide plate 40, ie, average vertical dimension, is 2nd blade | wing space part 22b. In other words, the space formed between the first flat plate portion 42a and the pulsator 9 is the first blade space portion 22a, and the space formed between the second flat plate portion 42c and the pulsator 9 is the second blade. This is the space 22b.

The second distance G2 is smaller than the first distance G1. That is, the average vertical dimension of the second blade space 22b is narrower than that of the first blade space 22a.
The lower part of the back blade 18 is a state in which the water guide plate 40 is attached to the pulsator 9, and the straight part 18a is provided at a part corresponding to the first flat plate part 42a, the step part 18b is provided at a part corresponding to the step part 42b, and the second part. The portion corresponding to the flat plate portion 42c is in contact with the straight portion 18c.

  The straight portion 18a, the step portion 18b, and the straight portion 18c are configured to match the shapes of the first flat plate portion 42a, the step portion 42b, and the second flat plate portion 42c, respectively. For this reason, the rotation locus of the lower part of the back blade 18 matches the shape of the water guide plate 40. The back blade 18 and the water guide plate 40 are fixed integrally with an adhesive, for example.

  The operation when the back blade 18 functions as a pump will be described. When the pulsator 9 rotates, the back blade 18 formed integrally with the pulsator 9 also rotates to develop a pump action. The water stored in the aquarium 6 is pumped up by the rotating back blade 18 through the opening 44 and moves to the blade space 22. Further, when water is also present at the bottom of the water tank 6 and above the pulsator 9, the water passes through the holes 34 and moves to the blade space 22.

  The water that has moved to the blade space 22 is transferred outward by the centrifugal force generated by the rotating action of the back blade 18. That is, water moves from the first blade space 22a to the second blade space 22b. Here, the lower side of the back blade 18 is closed by a water guide plate 40 that is integrally fixed so as to cover the lower surface of the lower portion of the back blade 18 in an annular shape. The water pressure expressed by the above acts on the water in the blade space 22 without waste without diffusing outside the blade space 22.

  The second blade space 22b has a narrower average vertical dimension than the first blade space 22a. Accordingly, the water pressure is further increased in the second blade space portion 22b, that is, the peripheral portion close to the end of the pulsator 9, so that the water is transferred to the outer side more vigorously and communicated with the blade space portion 22. It is discharged into the circulating water channel 19. The water discharged into the circulating water channel 19 is pushed up and moved above the circulating water channel 19 and is discharged from a discharge port 26 provided in the upper part of the circulating water channel 19 to a predetermined place in the water tank 6.

  In FIG. 6, the modification of the pulsator 9 and the back blade | wing 18 is shown. FIG. 6 is a bottom view of the pulsator 9 in which the back blade 18d is integrally formed. The plurality of back blades 18 of the pulsator 9 shown in FIG. 4 is configured as a linear shape extending radially from the rotation center 25 of the pulsator 9 in the outer circumferential direction, and the back blades 18 are arranged at predetermined intervals. It is illustrated as an example.

  On the other hand, in the plurality of back blades 18d shown in FIG. 6, the intermediate portion in the radial direction extends outward from the rotation center 25, and is in any one direction in the clockwise direction or the counterclockwise direction. The back blades 18 are arranged in a radial pattern at predetermined intervals so as to be convex. FIG. 6 shows an example in which the back blade 18d is configured by a slightly curved curve so that the radial intermediate portion is convex in the counterclockwise direction when viewed from below. Between the adjacent back blades 18d, a plurality of holes 34 are arranged at positions that do not overlap the back blade 18d. In the plurality of holes 34, the intermediate portion in the radial direction protrudes from the rotation center 25 toward the outer side in any one direction in the clockwise direction or the counterclockwise direction, and in FIG. 6, the curve is slightly curved. They are arranged in a curve.

The washing machine 100 according to the embodiment has the following effects.
The washing machine 100 according to the embodiment includes a back blade 18 (blade) provided at a lower portion of the pulsator 9 and having a pump function, and a circulation water channel 19 that discharges water discharged from the back blade 18 to a predetermined place in the water tank 6. A water guide plate 40 is provided below the back blade 18. With this configuration, the pump efficiency of the back blade 18 can be improved, so that the pump flow rate can be increased without increasing the rotational speed of the pulsator. Accordingly, it is possible to increase the amount of water discharged from the circulation channel 19 to the water tank 6 and circulated, that is, the washing water, by the pumping action of the back blade 18. For this reason, since a lot of washing water can be supplied to clothing, washing unevenness can be reduced and washing performance can be improved.

  According to the washing machine 100 which concerns on embodiment, the back blade | wing 18d is comprised by the curve which curves so that it may protrude in arbitrary one direction toward the outer side from the rotation center 25 side of the pulsator 9. FIG. The pulsator 9 is provided with a plurality of holes 34 through which water can permeate. The row of the plurality of holes 34 is curved in the same direction as the curve of the back blade 18d, and between the adjacent back blades 18d. Are arranged at positions that do not overlap the back blade 18d.

  With this configuration, the water turbulence is reduced, the resistance of the water is reduced, the flow of water (fluid) in the blade space 22 is smoothed, and the flow rate of water to be discharged, that is, the pump flow rate can be increased. . That is, the water flow discharged in the radial direction from the blade space 22 becomes a curvilinear flow that is convex in the rotation direction in the blade space, but if the back blade is straight at that time, the difference in shape between them Turbulence and separation occur in the part and become resistance to flow. On the other hand, if the back blade is curved along the water flow, turbulent flow is less likely to occur, and resistance to flow can be reduced. Moreover, since the water which permeate | transmits the hole 34 is not prevented by the back blade | wing 18d, a pump flow rate is not reduced also in this surface.

  According to the washing machine 100 which concerns on embodiment, between the pulsator 9 and the water guide plate 40 is the blade | wing space part 22, and the blade | wing space part 22 is the 1st blade | wing space part 22a by the side of the rotation center 25 of the pulsator 9, and a periphery. The second blade space portion 22b is provided with a part-side second blade space portion 22b, and the second blade space portion 22b is narrower in average vertical dimension than the first blade space portion 22a.

  With this configuration, the water pressure increases as it approaches the second blade space portion 22b, that is, the outer peripheral portion of the pulsator 9, so that the water is transferred to the outer side more vigorously, increasing the force, and circulating to the blade space portion 22 The water is discharged into the water channel 19, and more water, that is, washing water is pumped up in the circulating water channel 19 and discharged into the water tank 6. Thereby, even if it does not raise the rotation speed of the pulsator 9, a pump flow rate increases and the amount of washing water discharged and circulated to the water tank 6 can be increased. For this reason, more washing water can be supplied to clothing, washing unevenness can be reduced, and washing performance can be improved.

  In the above embodiment, the direction in which the back blade 18d curves may be convex in the clockwise direction or convex in the opposite direction. In this case, the arrangement of the plurality of holes 34 may be curved and arranged accordingly.

  Moreover, although the example which provided the donut-shaped opening part 44 in the water guide plate 40 was shown, it is not restricted to this. For example, a plurality of small holes may be provided in the central portion of the water guide plate 40 and the openings 44 may be used. When the opening 44 is configured by a small hole, since the small hole functions as a filter, a large object such as a coin does not enter the blade space 22 and the back blade 18 is not damaged.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawing, 100 is a washing machine, 6 is a water tank, 9 is a pulsator, 18 and 18a are back blades, 19 is a circulating water channel (water channel), 22 is a blade space portion, 22a is a first blade space portion 22a and 22b is a second. The blade space portions 22b and 25 are rotation centers, 34 is a hole, 40 is a water guide plate, and 44 is an opening.

Claims (4)

A water tank, a pulsator provided rotatably in the water tank, a back blade provided on the lower surface of the pulsator and having a pump function, and a water channel for discharging a discharge liquid from the back blade to a predetermined place in the water tank And comprising
A washing machine provided with a water guide plate that covers the lower surface of the back blade in an annular shape.   2. The washing machine according to claim 1, wherein the back blade is configured by a curve that extends outward from a rotation center side of the pulsator and curves so as to be convex in any one direction in the rotation direction.   The washing machine according to claim 2, wherein the pulsator is provided with a plurality of holes through which water can permeate, and the plurality of holes are curved and arranged in the same direction as the curve of the back blade. Between the pulsator and the water guide plate is a blade space, the blade space includes a first blade space on the rotation center side of the pulsator, and a second blade space on the peripheral side,
The washing machine according to any one of claims 1 to 3, wherein the second blade space portion has an average vertical dimension smaller than that of the first blade space portion.

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