TW201313984A - Washing machine - Google Patents

Abstract

A washing machine is provided with a tub in which washing articles and water are contained, and a stirring body which is disposed on an inner base of the tub and which is rotated during a washing operation. The stirring body has a base (30), a central projection part (31) which is disposed on the middle of the base (30), a plurality of blade parts (32) which are disposed on the base (30) projecting therefrom and which extend radially about the central projection part (31). The base (30) has a concave curved surface (35) which is positioned surrounding the central projection part (31) and between the adjacent blade parts (32) and which is formed such that the base (30) is depressed downwards into a curved plane, and a convex curved surface (36) which is positioned on a periphery of the concave curved surface (35) and which is formed such that the base (30) projects upwards into a curved plane.

Description

washing machine

Embodiments of the present invention relate to a washing machine.

Conventionally, a washing machine having a vertical axis and having a dehydration includes a tank provided as a dewatering tank and a washing tank in a water tank, and a stirring body provided at the inner bottom of the tank. In such a washing machine, washing is performed by rotating the stirring body while the laundry and the water are contained in the tank. The agitating body is, for example, a base having a circular shape, a central convex portion provided at a central portion of the base plate, and a plurality of wing portions radially extending from the central convex portion 2 on the upper surface portion of the base plate.

In the conventional configuration as described above, when the stirring body is rotated, for example, the agitating body is less likely to catch the laundry, and the washing efficiency is poor.

[Previous Technical Literature] [Patent Document]

[Patent Document 1] Japanese Patent No. 3315279

Here, in the case where the agitator is rotated and the laundry is provided, a washing machine capable of improving the washing efficiency is provided.

The washing machine according to the embodiment includes a tank for storing laundry and water, and a stirring body that is provided at the inner bottom of the tank and that rotates during the washing operation. The agitating body has a base plate, a central convex portion provided at a central portion of the base plate, and a plurality of wing portions projecting toward the base plate and radially extending around the central convex portion. The base plate has a concave curved surface provided so as to be recessed in a curved shape between the adjacent convex portions around the central convex portion, and located on the outer peripheral portion side of the concave curved surface. The base plate has a convex curved surface that protrudes in a curved shape toward the upper side.

[Formation for carrying out the invention]

Hereinafter, a washing machine according to an embodiment will be described with reference to the drawings. The washing machine body 1 shown in Fig. 1 is a vertical axis type which also serves as a dewatering washing machine. Hereinafter, the left side of FIG. 1 is referred to as the front side of the washing machine body 1, and the right side of FIG. 1 is used as the rear side of the washing machine body 1. The washing machine body 1 includes an outer box 2 having a rectangular box shape, and a top cover 3 provided at an upper portion of the outer box 2. The outer case 2 and the top cover 3 are outer casings constituting the washing machine body 1. A foot portion 4 is provided at the bottom of the outer box 2. The top cover 3 has a laundry inlet and outlet 5 and a lid 6. The laundry inlet and outlet 5 is formed through a substantially central portion of the top cover 3. The cover 6 is rotatably provided at the rear end portion of the top cover 3. The cover 6 is rotated with the mounting portion of the top cover 3 as a fulcrum, and is bent at the central portion in the front-rear direction. Fold in two folds. Thereby, the cover 6 closes the laundry inlet and outlet 5.

The washing machine body 1 includes a water tank 7, an elastic hanging mechanism 8, a tank cover 9, and a rotary tub 10. The water tank 7 is provided inside the outer box 2. The water tank 7 is formed in a cylindrical shape, has a bottom on the lower side, and has an opening on the upper side. The water tank 7 constitutes a storable water. The water tank 7 is elastically supported by the outer casing 2 by an elastic suspending mechanism 8. The elastic suspending mechanism 8 is configured mainly by a lifting rod 8a and a spring 8b. The tank cover 9 is formed in a frame shape and is provided at an upper end portion of the water tank 7.

The rotary groove 10 is provided inside the water tank 7. The rotary groove 10 is provided to be rotatable relative to the water tank 7. The rotary groove 10 is formed in a cylindrical shape, the lower side has a bottom, and the upper side is an opening. The rotary groove 10 functions as a groove. The rotary groove 10 has a through hole 11 and a rotary balancer 12. The through hole 11 is formed in a large number in the entire side wall 10a of the rotary tub 10, and the through side wall 10a communicates with the inner side and the outer side of the rotary groove 10. At the time of dehydration, water in the rotary tub 10 escaping from the through hole 11 to the outside of the rotary tub 10. The rotary balancer 12 is provided at the upper end portion of the rotary tub 10. The rotary balancer 12 is formed, for example, in an annular shape, and is filled with a liquid inside.

Further, the washing machine body 1 includes a stirring body 13 and a driving unit 14. The agitating body 13 is located in the vicinity of the bottom of the inner side of the rotary tub 10, and is provided to be rotatable. The drive unit 14 is provided outside the bottom of the water tank 7. The drive unit 14 is a clutch mechanism that has a motor and a power transmission switch for performing a washing operation and a dehydration operation. When the driving unit 14 is in the washing operation, only the agitating body 13 is alternately rotated in the forward and reverse directions at a low speed via the agitating body drive shaft 15. Further, during the spin-drying operation, the drive unit 14 rotates the rotary tub 10 and the agitating body 13 at a high speed in one direction via the rotary groove drive shaft 16. turn.

A drain port 17 is formed at the bottom of the water tank 7. A drain hose 19 is connected to the drain port 17 via a drain valve 18. When the drain valve 18 is closed, the water supplied into the rotary tub 10 is stored in the rotary tub 10 and in the water tank 7. Further, the washing machine body 1 is provided with a water supply device (not shown). The water supply device is provided inside the rear portion of the top cover 3. The water supply device has an unillustrated feedwater valve. The water supply valve is a faucet that connects tap water via a water supply hose (not shown). When the water supply valve is opened, the tap water supplied from the faucet is supplied into the rotary tank 10 and the water tank 7 via the water supply device.

The water tank 7 has a choke valve 20. The choke valve 20 communicates with the drain port 17. Although the choke valve 20 is not shown in detail, a pressure type water level sensor is connected via the gas pipe 21. The water level sensor detects the water level in the water tank 7, that is, in the rotary tank 10. An overflow passage 22 is provided at an upper portion of the water tank 7.

The rotary groove 10 has a water passage cover 24. The water passage cover 24 is provided inside the side wall 10a of the rotary tub 10 and extends in the vertical direction. A space portion is formed by the inner surface of the side wall 10a and the water passage cover 24. This space portion functions as the circulation water passage 23. The lower end portion of the circulation water passage 23 communicates with the pump chamber 25 formed below the agitating body 13. The pump chamber 25 is a space portion formed between the lower surface of the agitating body 13 and the inner bottom surface of the rotary tub 10. A plurality of inner fins 26 are provided on the lower surface of the agitating body 13. The inner flap 26 projects toward the inside of the pump chamber 25.

As shown in FIGS. 2 and 3, the water passage cover 24 has a concave curved surface portion 27. The concave curved surface portion 27 is outwardly viewed from the rotation center side of the rotary groove 10, that is, it is curved toward the side wall 10a side of the rotary groove 10. Concave curved surface portion 27 Extend in the up and down direction. The concave curved surface portion 27 is curved more than the side wall 10a. That is, the radius of curvature of the concave curved surface portion 27 is smaller than the radius of curvature of the side wall 10a of the rotary groove 10. The water passage cover 24 has three discharge ports 28. The three discharge ports 28 are provided from the intermediate portion in the vertical direction of the concave curved surface portion 27 of the water passage cover 24 to the upper portion. The discharge port 28 is an opening that extends long in the lateral direction and communicates with the inside of the circulating water passage 23 and the rotary tub 10 .

Next, the agitating body 13 will be described with reference to FIGS. 4 to 7 . The agitating body 13 is made of a member made of synthetic resin. The agitating body 13 is integrally provided with a base plate 30, a central convex portion 31, a plurality of wing portions, and at this time, three wing portions 32, and a plurality of inner fin pieces 26. As shown in FIG. 5, the base 30 has a circular shape as viewed from above and functions as a susceptor. The central convex portion 31 is provided at a central portion of the base 30. The three wing portions 32 are respectively protruded toward the base plate 30. The wing portions 32 extend radially outward from the central convex portion 31 toward the outer side in the radial direction of the base disk 30. The inner flap 26 is provided on the lower surface of the base 30, that is, on the inside. The inner fin piece 26 also radially extends from the center portion of the base plate 30 toward the outer side in the radial direction of the base plate 30.

The central convex portion 31 has a hub portion 33 at the center portion. The upper end portion of the agitator drive shaft 15 shown in Fig. 1 is fitted to the hub portion 33 from the lower side of the base plate 30. At the upper end portion of the agitating body drive shaft 15, the screw 34 is locked from the upper side of the hub portion 33. Thereby, the agitating body drive shaft 15 is fixed without falling off from the hub portion 33. At this time, the agitating body 13 rotates integrally with the agitating body drive shaft 15. The three wing portions 32 are provided at equal intervals around the central convex portion 31. As shown in FIG. 5, each of the wing portions 32 has a slightly curved intermediate portion in the radial direction as viewed from above, and is formed to have a convex shape on the side opposite to the clockwise direction.

The base plate 30 has a concave curved surface 35 and a convex curved surface 36. The concave curved surface 35 is located around the central convex portion 31 and between the adjacent wing portions 32, so that the base plate 30 is formed to have a curved concave shape on the lower side. The convex curved surface 36 is positioned between the adjacent peripheral portions 32 on the outer peripheral side of each concave curved surface 35, and the base plate 30 is formed to protrude in a curved shape toward the upper side. Between the concave curved surface 35 and the convex curved surface 36, as shown in FIGS. 6 and 8, a curvature change point 37 is formed.

In FIG. 7, in order to compare the height relationship of the central convex part 31, the wing part 32, the concave curved surface 35, and the convex curved surface 36, it is convenient to show the sectional view in one figure. In Fig. 7, the base plate 30 is partially low in the concave curved surface 35, gradually becomes higher from the curvature change point 37 to the convex curved surface 36, and is formed to the highest in the outer peripheral portion. The base plate 30 has ribs 38a and ribs 38b. The rib 38a is provided at the end of the outer peripheral portion of the base 30, and protrudes only slightly upward. The rib 38b is provided at the end of the outer peripheral portion of the base 30, and protrudes slightly downward.

The upper edge portion 32a of the wing portion 32 gradually increases from the center convex portion 31 toward the outer peripheral portion, that is, toward the outer side in the radial direction of the base plate 30. Further, the upper edge portion 32a is the highest highest point 39, and is continuous in a predetermined range toward the outer peripheral portion side. In Fig. 7, the area of the continuous highest point 39 is indicated as the highest point area 40. The highest point 39 of the wing portion 32 is higher than that of the central convex portion 31. The position 40a of Fig. 7 indicates the position of the most central portion of the highest point region 40, that is, the central convex portion 31. The position 40a is located slightly on the outer peripheral side than the curvature change point 37. Therefore, the highest point 39 of the wing portion 32 is located further on the outer peripheral side of the agitating body 13 than the curvature change point 37. That is, the highest point region 40 is located further outward than the curvature change point 37 in the radial direction of the base plate 30.

The distance L of Fig. 7 indicates the upper surface of the base plate 30, that is, the concave curved surface 35. The distance between the convex curved surface 36 and the upper edge portion 32a of the wing portion 32 in the height direction. The position P indicates a position at which the distance L becomes the maximum distance L1. The position P is located on the side of the central convex portion 31 more than the curvature change point 37. At this time, in the concave curved surface 35, the lowermost point 41 of the lowest concave curved surface is located closer to the central convex portion 31 than the position P. The distance L is gradually smaller toward the outer side in the radial direction of the base 30 on the outer peripheral side of the position P.

The agitating body 13 has a plurality of small holes 42 and a plurality of ribs 43. The small hole 42 is formed by penetrating the upper surface of the center convex portion 31, the concave curved surface 35 of the base plate 30, and the convex curved surface 36 in the vertical direction. The rib 43 is provided on the lower side which becomes the back side of the base 30.

As shown in FIG. 1, the washing machine body 1 includes an operation panel 44 and a control device 45. The operation panel 44 is provided at the front of the top cover 3. Although not shown in the operation panel 44, various operation keys and display sections are provided. The control device 45 is provided on the back side of the operation panel 44. The control device 45 is constituted by a microcomputer as a main body. The control device 45 automatically controls the strokes of the laundry operation, the dehydration operation, and the like in accordance with the control of the operation keys, the control program provided in advance, and the like. At this time, the control device 45 functions as a control means.

In the above-described configuration, when the user puts the laundry and the lotion into the rotary tub 10, the operation button of the operation panel 44 is operated to set the stroke and the like, and the operation is started. Thus, the control device 45 performs the washing operation in accordance with its operation. The washing operation is, for example, each step of washing, washing, and dehydrating in sequence.

In the washing course, first, the water supply valve of the water supply device is opened in a state where the drain valve 18 is closed, and tap water is supplied into the rotary tank 10 and the water tank 7 Inside. The water is supplied to the water level in the water tank 7 until the set water level is reached. Further, the drive unit 14 alternately rotates the agitating body 13 in the forward and reverse directions at a low speed via the agitator drive shaft 15. Thereby, the laundry in the rotary tank 10 is stirred and washed. At this time, as the agitating body 13 rotates, the water in the pump chamber 25 is sent to the side of the circulating water passage 23 by the inner fins 26. The water sent to the side of the circulating water passage 23 rises in the circulating water passage 23, and is discharged from the respective discharge ports 28 toward the inside of the rotating tub 10 as indicated by an arrow S in FIG. Each of the discharge ports 28 has a concave curved surface portion 27 which is curved in a curved shape toward the outer side, that is, toward the side wall 10a of the rotary groove 10, from the rotation center side of the rotary groove 10. Therefore, the water discharged from the discharge port 28 toward the inside of the rotary tub 10 is concentrated toward the center of rotation of the rotary tub 10 without being enlarged.

When the cleaning time is set, the control device 45 stops the rotation of the agitating body 13, and then opens the drain valve 18 to drain the water in the water tank 7 and the rotary tank 10 to the outside of the machine. Thereafter, the control device 45 performs intermediate dehydration. In the middle of dehydration, the control unit 45 drives the drive unit 14 in a state where the drain valve 18 is opened, and the rotary tub 10 is rotated at a high speed in one direction together with the agitating body 13. Thereby, centrifugal dehydration of the laundry in the rotary tank 10 is performed.

Thereafter, the control device 45 performs a washing course. In the washing course, for example, shower washing and storage washing are performed. In the shower, the water is supplied to the rotary tub 10 while the drain valve 18 is opened, and the rotary tub 10 is rotated together with the agitating body 13 while watering the laundry. In the storage and washing, in the state in which the drain valve 18 is closed, in the water tank 7 and in the rotary tank 10 The agitating body 13 is alternately rotated in both the forward and reverse directions at a low speed in a state where water is stored therein. Further, the control device 45 also performs intermediate dehydration between shower washing and storage washing.

The control device 45 performs the final dewatering stroke when the washing course is finished. In the final dewatering process, in the state in which the drain valve 18 is opened, the rotary tub 10 is rotated at a high speed in one direction together with the agitating body 13, and the laundry in the rotary tub 10 is centrifugally dehydrated. According to the above, the washing operation is finished.

According to the above embodiment, the following effects can be obtained.

The agitating body 13 has a central convex portion 31 at a central portion of the base 30 that serves as a susceptor. Therefore, when the washing operation of the rotation of the agitating body 13 is performed, the laundry is less likely to accumulate in the central portion of the agitating body 13, and the laundry can be prevented from being entangled with each other.

A concave curved surface 35 is provided on the base 30 of the agitating body 13 around the central convex portion 31 and positioned between the adjacent wing portions 32. Therefore, when the washing operation of the rotation of the agitating body 13 is performed, the laundry easily enters the concave curved surface 35 between the adjacent wing portions 32, and the laundry is easily caught by the concave curved surface 35 and the wing portion 32. As a result, the laundry can be stirred well, and the washing efficiency can be improved.

Further, the agitating body 13 has a convex curved surface 36 on the outer peripheral side of the base 30. Thereby, the portion having the convex curved surface 36 becomes shallower than the portion having the concave curved surface 35. Therefore, when the agitating body 13 rotates, the outer peripheral portion of the agitating body 13 provided with the convex curved surface 36 is reduced in resistance by washing and water, and the agitating body 13 is easily rotated. Thereby, the cleaning efficiency can be improved.

Further, at this time, since the number of the wing portions 32 in the agitating body 13 is only three, the distance between the adjacent wing portions 32 can be increased, and the laundry can be further caught. Further, when the number of the wings is, for example, six, the distance between the adjacent wings is reduced, so that the laundry is likely to straddle between the adjacent wings. When this is the case, it is difficult to catch the laundry by the wing portion, and the stirring efficiency is lowered. In this regard, according to the present embodiment, such a situation can be prevented as much as possible. Therefore, the cleaning efficiency can be further improved.

The curvature change point 37 of the curvature of the concave curved surface 35 and the convex curved surface 36 is such that the distance L between the upper edge portion 32a of the wing portion 32 and the concave curved surface 35 and the convex curved surface 36 is higher than the position P at which the maximum distance L1 is obtained. Located on the side of the central convex portion 31. According to this, since the depth in the vicinity of the concave curved surface 35 at the center portion becomes deeper than the curvature change point 37, the laundry is more likely to gather near the concave curved surface 35, and the laundry is further caught. Further, at the start of the water supply or the like, since the water quickly gathers near the concave curved surface 35, the water is easily immersed in the laundry.

The highest point 39 of the upper edge portion 32a of the wing portion 32, that is, the highest point region 40 is set higher than the central convex portion 31. When the central convex portion 31 is higher than the wing portion 32, the laundry tends to be caught in the central convex portion 31, and there is a concern that the cloth is likely to be scratched. According to the present embodiment, it is possible to prevent such an irregularity as much as possible, and it is possible to form the wing portion 32 to stir the laundry well.

The highest point 39 of the wing portion 32, that is, the highest point region 40, is located further on the outer peripheral side of the agitating body 13 than the curvature change point 37. Further, even on the outer peripheral side of the agitating body 13, the wing portion 32 can be used to catch the laundry, and the washing efficiency can be improved by this.

The discharge port 28 of the circulation water passage 23 has a concave curved surface portion 27 that is curved in a curved shape toward the outer side, that is, toward the side wall 10a of the rotary groove 10, as viewed from the rotation center side of the rotary groove 10. Therefore, the water discharged from the discharge port 28 toward the inside of the rotary tub 10 may be concentrated toward the center of rotation of the rotary tub 10 without being enlarged. Therefore, for example, when there is a laundry floating on the water surface in the central portion in the rotary tub 10, the water discharged from the discharge port 28 forms a concentrated watering of the laundry, and the wetted laundry can be effectively wetted. .

(Other embodiments)

In the above embodiment, the wing portion 32 of the agitating body 13 is not limited to three, and two or four or more members may be used.

The agitating body 13 as a groove disposed in the inner bottom portion is not limited to the rotatable rotary groove 10 which also serves as a dewatering tank. In this case, as long as it can be washed, it may be a tank dedicated to washing which does not double as a dewatering tank.

As described above, according to the present embodiment, the agitating body has a base as a base, a central convex agitating body provided at a central portion of the base, and a base extending on the base so as to extend radially around the central convex portion. Multiple wings. The base plate is plural and has three concave curved surfaces and convex curved surfaces at this time. The concave curved surface is formed between the adjacent convex portions and between the adjacent wing portions, and the base plate is provided with a concave shape which is curved toward the lower side. The convex curved surface is on the outer peripheral side of the concave curved surface, and is formed so that the base plate protrudes in a curved shape toward the upper side.

Thereby, when the washing operation of the stirring body is rotated, the laundry easily enters a low concave curved surface between the adjacent wing portions. Therefore, it is easy to use a concave curved surface and The wing catches the laundry, and the laundry is well stirred, and the washing efficiency can be improved. Further, the convex curved surface is present on the outer peripheral side of the agitating body, and the portion having the convex curved surface becomes shallower than the portion having the concave curved surface. As a result, when the agitating body rotates, the resistance of the laundry and the water is reduced in the outer peripheral portion of the agitating body, and the rotation of the agitating body is facilitated. This also improves the cleaning efficiency.

The embodiments of the present invention are described, and the embodiments are presented as examples, and are not intended to limit the scope of the invention. The embodiments of the present invention can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the scope of the invention. The embodiments and the modifications thereof are included in the scope and spirit of the invention, and are included in the scope of the invention described in the scope of the Japanese Patent and the equivalents thereof.

1‧‧‧Washing machine body

3‧‧‧ top cover

5‧‧‧Washing entrances and exits

6‧‧‧ Cover

44‧‧‧Operator panel

45‧‧‧Control device

9‧‧‧ hood

7‧‧‧Sink

10‧‧‧Rotating trough

8a‧‧‧ hanging stick

8‧‧‧Elastic hanging mechanism

8b‧‧ ‧ spring

12‧‧‧Rotary balancer

11‧‧‧through hole

26‧‧‧里翼片

36‧‧‧ convex surface

30‧‧‧Base

15‧‧‧Agitator drive shaft

35‧‧‧ concave surface

32‧‧‧ wing

31‧‧‧Central convex

34‧‧‧ screws

13‧‧‧ stirring body

33‧‧·Wheel hub

16‧‧‧Rotating groove drive shaft

15‧‧‧Agitator drive shaft

28‧‧‧Exporting

25‧‧‧ pump room

17‧‧‧Drainage

14‧‧‧ Drive Department

18‧‧‧Close the drain valve

19‧‧‧Drain hose

4‧‧‧foot

22‧‧‧ overflow road

2‧‧‧Outer box

10a‧‧‧ side wall

23‧‧‧Circular waterway

21‧‧‧ trachea

20‧‧‧Steel valve

42‧‧‧Small hole

23‧‧‧Circular waterway

24‧‧‧Water path cover

27‧‧‧ concave curved surface

S‧‧‧ arrow print

38a‧‧‧ rib

37‧‧‧ curvature change point

38b‧‧‧ rib

39‧‧‧ highest point

32a‧‧‧Upper edge

43‧‧‧ rib

P‧‧‧ position

L‧‧‧ distance

L1‧‧‧Maximum distance

Fig. 1 is a longitudinal side view of a washing machine according to an embodiment.

[Fig. 2] A broken perspective view of the vicinity of the waterway cover.

Fig. 3 is a transverse plan view taken along line A-A of Fig. 1.

[Fig. 4] A perspective view of a stirring body.

[Fig. 5] A plan view of the stirring body.

Fig. 6 is a longitudinal sectional view taken along line B-B of Fig. 5 .

Fig. 7 is an enlarged longitudinal sectional view of a main part of a stirring body.

13‧‧‧ stirring body

26‧‧‧里翼片

30‧‧‧Base

31‧‧‧Central convex

32‧‧‧ wing

32a‧‧‧Upper edge

33‧‧·Wheel hub

35‧‧‧ concave surface

36‧‧‧ convex surface

37‧‧‧ curvature change point

38a‧‧‧ rib

38b‧‧‧ rib

39‧‧‧ highest point

42‧‧‧Small hole

43‧‧‧ rib

Claims (5)

A washing machine comprising: a tank for accommodating laundry and water; and a stirring body provided at an inner bottom portion of the tank to rotate during a washing operation, wherein the agitating body has a base plate; and a central portion provided on the base plate a central convex portion; and a plurality of wing portions projecting toward the base plate and radially extending around the central convex portion, the base plate having the wing adjacent to the central convex portion A concave curved surface provided with a curved surface recessed toward the lower side of the base plate, and a convex curved surface provided on the outer peripheral portion side of the concave curved surface to project the base plate toward the upper side in a curved shape. The washing machine according to claim 1, wherein a position at which a distance between an upper edge portion of the wing portion and a concave curved surface and the convex curved surface is a maximum distance is larger than a curvature of the concave curved surface and the convex curved surface. The change point is further on the side of the aforementioned central convex portion. The washing machine according to claim 1, wherein the highest point of the wing portion is higher than the central convex portion. The washing machine according to claim 2, wherein the highest point of the wing portion is higher than the center convex portion. The washing machine according to any one of claims 1 to 4, wherein a highest point of the wing portion is closer to an outer peripheral portion side of the agitating body than a curvature change point of the concave curved surface and the convex curved surface.