CN107429465B - Washing machine - Google Patents

Abstract

The washing machine comprises: the washing and dewatering machine comprises a housing, an outer tank supported in the housing, a washing and dewatering tank rotatably arranged in the outer tank, and a balancer device (7) arranged above the washing and dewatering tank. The balancer device (7) is provided with an annular body (30), and the annular body (30) is provided with annular chambers (33, 34) in which a liquid (38) is sealed. A plurality of partition walls (36, 37) are radially arranged in annular chambers (33, 34) of an annular body (30), the plurality of partition walls (36, 37) have a plurality of shapes, respectively, and the partition walls (36, 37) having the plurality of shapes are arranged in the annular chambers (33, 34) in a predetermined arrangement.

Description

Washing machine

Technical Field

The present invention relates to a washing machine for washing laundry.

Background

A conventional washing machine suppresses vibration during dewatering by using a balancer device disposed above a washing and dewatering tub (for example, patent document 1).

A predetermined amount of liquid is sealed in an annular body formed by welding and sealing an upper annular housing and a lower annular housing to form a balancer device. When unbalance occurs due to deflection of clothes and the like in the washing and dewatering tub, the balancer device suppresses vibration by moving the liquid in the ring body to a position opposite to the position at which the deflection occurs.

In such a conventional balancer device, in the process of increasing the rotation speed of the washing and dewatering tub during dewatering, the liquid in the ring body moves with a delay from the increase in the rotation speed of the washing machine, and a 180-degree delay occurs during steady rotation, and thus vibration becomes large particularly during steady rotation.

Based on the above principle, the vibration can be suppressed by setting the height dimension of the annular body to be large or by configuring the annular chamber in which the interior of the annular body of the balancer device is partitioned into a plurality of layers.

However, since the balancer device is provided at the upper portion of the washing and dehydrating tub, the outer diameter is limited by the size of the washing and dehydrating tub, the inner diameter is limited by the size in consideration of taking out and putting in of laundry, and the height is limited by the height of a product and the volume of the washing and dehydrating tub. Therefore, a conventional washing machine is provided with a balancer device in which the inside of the annular body is partitioned into a plurality of annular chambers.

Fig. 17 is a partially cut perspective view of an example of a balancer device of a conventional washing machine. A conventional washing machine will be described with reference to fig. 17.

The balancer device 540 includes an annular body 543 formed by an upper annular housing 541 and a lower annular housing 542. When the annular body 543 is viewed from above in plan, the annular body 543 has a circular shape with a constant radial width and a constant inner diameter. Annular upper partition walls 547 and 548 are concentrically provided in the upper annular housing 541, and three layers of annular chambers 544, 545, and 546 are partitioned radially in the annular body 143 by the annular upper partition walls 547 and 548.

In the annular chambers 544, 545, 546, a plurality of upper partition walls 549a, 549b, 549c are formed radially from the inner wall on the outer peripheral side (the upper partition walls 549a, 549b, 549c are formed inside the annular chambers 544, 545, 546, respectively). Gaps are provided between the upper partition walls 549a, 549b, 549c and the inner side walls of the annular chambers 544, 545, 546, and air vents 553a, 553b, 553c for air circulation are provided between the upper partition walls 549a, 549b, 549c and the inner side walls of the annular chambers 544, 545, 546.

Lower partition walls 550 and 551 for partitioning the annular chambers 544, 545, and 546 are provided in the lower annular housing 542 so as to abut against the lower ends of the upper partition walls 547 and 548. In the lower annular housing 542, a plurality of lower partition walls 552a, 552b, 552c are radially provided at positions corresponding to the upper partition walls 549a, 549b, 549 c. Gaps are provided between the lower partition walls 552a, 552b, 552c and the inner peripheral side walls of the annular chambers 544, 545, 546, and liquid flow ports 554a, 554b, 554c through which the liquid sealed in the annular chambers 544, 545, 546 flows are provided in the gaps between the lower partition walls 552a, 552b, 552c and the inner peripheral side walls of the annular chambers 544, 545, 546. An injection port for injecting liquid into the annular chambers 544, 545, and 546 is formed in the lower annular case 542, and the injection port is sealed by the plugs 555, 556, and 557.

The balancer device 540 as described above is attached to the upper portion of the washing and dewatering tub, thereby suppressing vibration of the washing and dewatering tub.

When unbalance occurs in the washing and dehydrating tub due to the position of laundry in the washing and dehydrating tub, etc., the liquid of the balancer device 540 moves to a position where the unbalance is removed through the liquid flow ports 554a, 554b, 554c of the lower annular casing 542. The air in the annular chambers 544, 545, 546 moves through the air vents 553a, 553b, 553c of the upper annular housing 541 as the liquid moves, so that the liquid moves smoothly to suppress vibration of the washing and dehydrating tub.

In the structure of such a conventional balancer device, the partition wall shape in the annular body facilitates the flow of liquid, thereby improving the vibration suppression effect. In general, the balancer device can improve the vibration suppression effect by forming the annular chamber partition in multiple layers, but when the annular chamber is increased, the width dimension in the radial direction of the balancer device becomes large. Since the outer diameter of the balancer device is restricted by the outer diameter of the washing and dewatering tub, if the annular chamber is increased, the inner diameter of the balancer device becomes smaller, which causes a problem that the laundry cannot be easily taken out or put in.

On the other hand, if the radial width of the annular body is made narrow in order to reduce the radial width of the balancer device, the width of the liquid flow path becomes narrow, and the fluid is difficult to flow. For example, there are the following problems: the amplitude of vibration of the washing and dehydrating tank at the time of secondary resonance when the rotation speed of the washing and dehydrating tank is about 200rpm to 300rpm becomes large, and the vibration suppression effect is reduced.

Patent document 1: japanese laid-open patent publication No. 6-79087

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide a washing machine: the washing machine can improve the operation of taking out and putting in the washings without changing the size of the washing and dewatering tank and obtain high vibration suppression effect.

Specifically, a washing machine according to an embodiment of the present invention includes: the washing and dewatering device comprises a housing, an outer tank supported in the housing, a washing and dewatering tank rotatably arranged in the outer tank, and a balancer device having an annular body arranged above the washing and dewatering tank and enclosing a liquid. In the balancer device, an annular chamber in which a liquid is sealed is formed inside an annular body, and partition walls are radially arranged in the annular chamber. The partition walls have a plurality of shapes, and a flow path for the liquid is formed on the inner peripheral side of the annular body by the partition walls having the plurality of shapes. Partition walls having various shapes are provided in the annular chamber in a predetermined arrangement.

With this configuration, a washing machine which can obtain a high vibration suppression effect without changing the size of the washing and dehydrating tub of the washing machine and which can be easily operated to take out laundry can be provided. In addition, it is possible to provide a washing machine capable of miniaturizing the balancer device and obtaining a high vibration suppression effect.

Drawings

Fig. 1 is a longitudinal sectional view of a washing machine according to an embodiment of the present invention.

Fig. 2 is a perspective view of a main portion of a balancer device of a washing machine according to an embodiment of the present invention.

Fig. 3 is a sectional view of a first partition wall of a balancer device of a washing machine according to an embodiment of the present invention.

Fig. 4 is a sectional view of a second partition wall of the balancer device of the washing machine according to the embodiment of the present invention.

Fig. 5 is a sectional view of a third partition wall of a balancer device of a washing machine according to an embodiment of the present invention.

Fig. 6 is a sectional view of a first partition wall of a balancer device of a washing machine according to an embodiment of the present invention.

Fig. 7 is a sectional view of a first partition wall of a balancer device of comparative example 1 of a washing machine according to an embodiment of the present invention.

Fig. 8 is a sectional view of a first partition wall of a balancer device of comparative example 2 of a washing machine according to an embodiment of the present invention.

Fig. 9 is a characteristic diagram showing the amplitude of the washing and dehydrating tub of the balancer device provided with the washing machine according to the embodiment of the present invention.

Fig. 10 is a characteristic diagram showing the amplitude of the washing and dehydrating tub provided with the balancer device of comparative example 1 according to the embodiment of the present invention.

Fig. 11 is a characteristic diagram showing the amplitude of the washing and dehydrating tub provided with the balancer device of comparative example 2 according to the embodiment of the present invention.

Fig. 12 is a perspective view of a washing and dehydrating tub of a washing machine according to an embodiment of the present invention.

Fig. 13 is a plan view of the balancer device of the washing machine according to the embodiment of the present invention as viewed from above.

Fig. 14 is a graph showing the amplitude of the water in the washing and dehydrating tub using the balancer device of the washing machine according to the embodiment of the present invention.

Fig. 15 is a graph showing the amplitude of the water in the washing and dehydrating tub using the conventional balancer device.

Fig. 16 is a graph showing the amplitude of the water in the washing and dehydrating tub using the conventional balancer device in which the radial width of the annular body is narrow.

Fig. 17 is a perspective view of a main part of a balancer device of a conventional washing machine.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The present invention is not limited to the embodiment.

(embodiment mode)

A washing machine 100 according to an example of the embodiment of the present invention will be described with reference to fig. 1.

Fig. 1 is a longitudinal sectional view of a washing machine 100 according to an example of the embodiment of the present invention. In fig. 1, the housing 1 has a frame base 16 disposed on a lower portion thereof and an upper housing 22 disposed on an upper portion thereof. The structure is as follows: the outer tub 3 is elastically suspended and arranged inside the casing 1 by a plurality of suspensions, and the vibration of the outer tub 3 during the dehydration is absorbed by the suspensions 2. An outer tank cover 13 for covering the upper surface of the outer tank 3 is provided to the outer tank 3. A washing and dewatering tub 4 for storing laundry is disposed inside the outer tub 3, and the washing and dewatering tub 4 is supported so as to be rotatable about a hollow, double-layer shaft 5.

A plurality of water passage holes 4a are provided in the peripheral wall of the washing and dehydrating tub 4. A pulsator 6 for agitating laundry is rotatably provided at the bottom of the washing and dehydrating tub 4. The pulsator 6 has a substantially pan-shaped shape having an inclined surface 10 on the outer periphery thereof, and an agitating protrusion 11 is formed on the upper surface thereof.

A motor (drive unit) 8 is attached to the bottom of the outer side of the outer tub 3. The rotational force of the motor 8 is selectively transmitted to the washing and dehydrating tub 4 and the pulsator 6 via the shaft 5 by the clutch 9. The rotation of the pulsator 6 agitates the laundry by the agitating protrusion 11 during washing, rinsing, and spinning. By the agitation of the pulsator 6, the laundry is exchanged in the left and right (rotation direction) and also in the up and down direction.

A filter fixing frame 14 is fixed to a side wall in the washing and dewatering tub 4, and the filter 12 is detachably attached to the filter fixing frame 14. The filter 12 recovers lint generated from washing laundry by washing water in a washing operation.

The upper housing 22 has a support member 24 disposed therein, and the water supply valve 17 and a water supply hose (not shown) are attached to the support member 24. The water supply valve 17 has a plurality of valves for opening and closing the water path. When the water passage is opened by the water supply valve 17, water is supplied from the water supply member 21 provided above the support member 24 to the detergent dissolving unit 20 in the detergent storage unit 18 through the water supply hose, and washing water is supplied to the washing and dehydrating tub 4 through the detergent dissolving unit 20 and the like. A drain hose 15 is connected to a lower portion of the outer tub 3, and is configured to discharge water after cleaning, rinsing, and dewatering to the outside.

An operation portion 19 is provided at an upper rear position of the upper frame 22, and the detergent storage portion 18 is disposed at a position close to the operation portion 19 so as to be removable. The upper frame 22 has an opening for taking in and out the washing medium with respect to the washing and dehydrating tub 4, and an outer cover 23 openably and closably closing the opening. The outer lid 23 has a grip portion necessary for a user to operate, and a hinge mechanism capable of bending the outer lid 23 is provided in an intermediate portion of the outer lid 23.

A balancer device 7 is disposed above the washing and dewatering tub 4. In washing and rinsing, the laundry is rarely uniformly distributed in the washing and dehydrating tub 4 after draining, and the laundry is generally unevenly distributed in the washing and dehydrating tub 4, and an unbalanced state occurs in the washing and dehydrating tub 4. In order to correct an unbalanced state caused by the uneven distribution of the laundry, a balancer device 7 is provided at an upper portion of an inner circumference of the washing and dehydrating tub 4.

The balancer device 7 has an outer diameter substantially the same as the outer diameter of the washing and dewatering tub 4.

Next, the balancer device 7 of the washing machine 100 according to the embodiment of the present invention will be described with reference to fig. 2 to 5.

Fig. 2 is a perspective view of a main portion of the balancer device of the washing machine 100 according to the embodiment of the present invention. As shown in fig. 2, the balancer device 7 has an annular body 30 formed of an upper annular housing 31 and a lower annular housing 32. Inside the annular body 30, annular chambers 33, 34 of double layers are formed by partitioning in the radial direction by an annular partition wall 35. A plurality of partition walls 36 and 37 are radially formed in the annular chambers 33 and 34.

The partition walls 36 and 37 are formed to have substantially the same shape on the inner peripheral side in the annular chambers 33 and 34. In addition, the partition walls 36, 37 have various shapes, respectively. Specifically, for example, in the present embodiment, the partition walls 36 and 37 have three shapes, i.e., the first partition walls 36a and 37a, the second partition walls 36b and 37b, and the third partition walls 36c and 37 c.

Fig. 3 is a sectional view of the positions of the first partition walls 36a, 37a of the balancer device 7. As shown in fig. 3, the first partition walls 36a, 37a have outer peripheral side portions 36a-1, 37a-1 that contact the inner surface of the outer peripheral side in the annular chambers 33, 34, and inner peripheral side portions 36a-2, 37a-2 that contact the inner surface of the inner peripheral side in the annular chambers 33, 34. The first partition walls 36a, 37a are formed such that the outer peripheral side portions 36a-1, 37a-1 in the annular chambers 33, 34 are slightly higher than the inner peripheral side portions 36a-2, 37 a-2.

In the annular chambers 33, 34, grooves 55a, 56a are provided between the inner circumferential side surfaces of the outer circumferential side portions 36a-1, 37a-1 of the first partition walls 36a, 37a and the inner circumferential side surfaces of the annular chambers 33, 34. The width dimension of the groove portions 55a, 56a (the width of the groove portions 55a, 56a in the radial direction of the ring body 30) is set to Wa, the height of the inner peripheral side portions 36a-2, 37a-2 of the first partition walls 36a, 37a is set to La, and the height of the outer peripheral side portions 36a-1, 37a-1 of the first partition walls 36a, 37a is set to La. Spaces 57a and 58a are formed in the annular chambers 33 and 34 above the first partition walls 36a and 37a, and the spaces 57a and 58a and the grooves 55a and 56a constitute a flow path for the liquid 38. In the present embodiment, first partition walls 36a, 37a are formed at 24 positions at intervals of 15 degrees at the center angle in the annular body 30.

The first partition walls 36a and 37a function as flow paths through which the liquid in the annular chambers 33 and 34 moves by centrifugal force in a state where the washing and dehydrating tub 4 is rotating. That is, the spaces 57a and 58a and the grooves 55a and 56a above the first partition walls 36a and 37a form flow paths through which the liquid in the annular chambers 33 and 34 moves by centrifugal force in the rotating state of the washing and dehydrating tub 4, by the first partition walls 36a and 37 a. By forming the first partition walls 36a and 37a so as to widen the flow path, the liquid can be efficiently moved.

Fig. 4 is a sectional view of the second partition walls 36b, 37b of the balancer device 7. As shown in fig. 4, the second partition walls 36b, 37b have outer peripheral side portions 36b-1, 37b-1 that contact the outer peripheral side inner surfaces in the annular chambers 33, 34, and inner peripheral side portions 36b-2, 37b-2 that contact the inner peripheral side inner surfaces in the annular chambers 33, 34. The second partition walls 36b, 37b are provided to extend the outer peripheral side portions 36b-1, 37b-1 of the annular body 30 to the upper surfaces of the annular chambers 33, 34. Spaces 57b, 58b functioning as flow paths through which liquid moves are formed between the inner circumferential side surfaces of the outer circumferential side portions 36b-1, 37b-1 of the second partition walls 36b, 37b in the annular chambers 33, 34 and the inner circumferential side surfaces in the annular chambers 33, 34. In the present embodiment, the annular body 30 has second partition walls 36b, 37b formed at 12 positions at intervals of 30 degrees at the center.

Similarly to the grooves 55a, 56a between the inner circumferential side surfaces of the outer circumferential side portions 36a-1, 37a-1 of the first partition walls 36a, 37a and the inner circumferential side inner surfaces of the annular chambers 33, 34, the grooves 55b, 56b are provided at the lower portions of the spaces 57b, 58b between the second partition walls 36b, 37b and the inner circumferential side inner surfaces of the annular chambers 33, 34. The height Lb of the inner peripheral side portions 36b-2, 37b-2 of the second partition walls 36b, 37b is formed to be substantially the same as the height La of the inner peripheral side portions 36a-2, 37a-2 of the first partition walls 36a, 37 a.

Further, the width dimension Wb of the groove portions 55b, 56b (the width of the groove portions 55b, 56b in the radial direction of the annular body 30) in the spaces 57b, 58b between the second partition walls 36b, 37b and the inner surfaces on the inner peripheral side of the annular chambers 33, 34 is formed to be substantially the same as the width dimension Wa of the groove portions 55a, 56a between the inner surfaces of the outer peripheral side portions 36a-1, 37a-1 of the first partition walls 36a, 37a and the inner surfaces of the annular chambers 33, 34.

Since the outer peripheral portions 36b-1 and 37b-1 of the second partition walls 36b and 37b extend to the upper surfaces of the annular chambers 33 and 34, the outer peripheral portions 36b-1 and 37b-1 function to restrict the movement of the liquid when the liquid in the annular chambers 33 and 34 moves to the outer peripheral side by the centrifugal force in the state where the washing and dehydrating tub 4 is rotating.

Fig. 5 is a sectional view of the third partition walls 36c, 37c of the balancer device 7 of the washing machine 100 of the present embodiment. As shown in fig. 5, the third partition walls 36c, 37c have outer peripheral side portions 36c-1, 37c-1 that contact the outer peripheral side inner surfaces in the annular chambers 33, 34, and inner peripheral side portions 36c-2, 37c-2 that contact the inner peripheral side inner surfaces in the annular chambers 33, 34. The third partition walls 36c, 37c are formed as: the outer peripheral side portions 36c-1, 37c-1 are projected from the inner wall of the outer peripheral side in the annular chambers 33, 34 in a smaller amount toward the upper side, and the intervals between the outer peripheral side portions 36c-1, 37c-1 and the inner surface of the inner peripheral side in the annular chambers 33, 34 are wider. Spaces 57c, 58c, which are flow paths through which the liquid moves, are formed between outer peripheral side portions 36c-1, 37c-1 of the third partition walls 36c, 37c and inner surfaces of the annular chambers 33, 34. Third partition walls 36c, 37c are formed at 12 positions at intervals of 30 degrees in the central angle in the annular body 30.

Similarly to the grooves 55a, 56a between the inner surfaces of the annular chambers 33, 34 and the inner surfaces of the third partition walls 36c, 37c and the annular chambers 33, 34, the grooves 55c, 56c are provided at the lower parts of the spaces 57c, 58c between the outer peripheral side parts 36a-1, 37a-1 of the first partition walls 36a, 37 a. The height Lc of the inner peripheral side portions 36c-2, 37c-2 of the third partition walls 36c, 37c is formed to be substantially the same as the height La of the inner peripheral side portions 36a-2, 37a-2 of the first partition walls 36a, 37a and the height Lb of the inner peripheral side portions 36b-2, 37b-2 of the second partition walls 36b, 37 b.

Further, the width dimension Wc of the bottom portions of the groove portions 55c, 56c (the width of the bottom portions of the groove portions 55c, 56c in the radial direction of the annular body 30) is formed to be substantially the same as the width dimension Wa of the groove portions 55a, 56a between the inner surface of the outer peripheral side portions 36a-1, 37a-1 of the first partition walls 36a, 37a and the inner surface of the annular chambers 33, 34 and the width dimension Wb of the groove portions 55b, 56b between the inner surface of the inner peripheral side portions 36b-1, 37b-1 of the second partition walls 36b, 37b and the inner surface of the annular chambers 33, 34.

As described above, the outer peripheral side portions 36c-1, 37c-1 of the third partition walls 36c, 37c are formed as: the amount of projection from the inner wall on the outer peripheral side in the annular chambers 33, 34 decreases as going upward of the annular chambers 33, 34. Namely, the following are formed: the space between the inner surface of the outer peripheral side portions 36c-1, 37c-1 of the third partition walls 36c, 37c and the inner surface of the inner peripheral side of the annular chambers 33, 34 becomes larger, and the spaces 57c, 58c become larger as going upward. With this configuration, the outer peripheral portions 36c-1 and 37c-1 of the third partition walls 36c and 37c function to restrict the movement of the liquid moving to the outer peripheral side by the centrifugal force in the process of increasing the rotation speed of the washing and dehydrating tub 4.

In particular, the outer peripheral portions 36c-1 and 37c-1 of the third partition walls 36c and 37c can prevent the liquid in the annular chambers 33 and 34 from completely moving to the outer peripheral sides of the annular chambers 33 and 34 due to centrifugal force while the washing and dehydrating tub 4 is in the process of rotating upward by the third partition walls 36c and 37 c. That is, the outer peripheral side portions 36c-1, 37c-1 of the third partition walls 36c, 37c have the following functions: the movement of the liquid is controlled so that the liquid in the annular chambers 33, 34 has substantially the same shape as the outer peripheral portions 36c-1, 37c-1 of the third partition walls 36c, 37c, in other words, the liquid in the annular chambers 33, 34 is in a state where the amount of the liquid below the annular chambers 33, 34 is larger than the amount of the liquid above the annular chambers 33, 34.

As shown in fig. 2, second partition walls 36b and 37b are disposed between two adjacent first partition walls 36a and 37a, that is, between one first partition wall 36a and 37a and the next first partition wall 36a and 37a, and third partition walls 36c and 37c are disposed between the next first partition wall 36a and 37a and the next first partition wall 36a and 37 a. Thereafter, the partition walls 36 and 37 having various shapes, that is, the first partition walls 36a and 37a, the second partition walls 36b and 37b, and the third partition walls 36c and 37c are provided in the above-described arrangement.

The arrangement of the partition walls 36 and 37, i.e., the first partition walls 36a and 37a, the second partition walls 36b and 37b, and the third partition walls 36c and 37c, having various shapes is not limited to the above arrangement, and the first partition walls 36a and 37a, the second partition walls 36b and 37b, and the third partition walls 36c and 37c, having various shapes, are arranged in an optimum arrangement order and combination that can efficiently and smoothly move the liquid in the annular chambers 33 and 34, depending on the shape of the washing and dehydrating tub 4, the material of the liquid in the annular chambers 33 and 34, the installation environment of the washing machine 100, and the like.

A predetermined amount of liquid 38 is sealed in the annular chambers 33, 34. Fig. 2 shows the liquid 38 in a state where the equalizer device 7 is stopped. The liquid 38 sealed in the annular chambers 33, 34 is set to 30% to 70% of the volume of the annular chambers 33, 34. The correction centrifugal force of the balancer device 7 is maximized by setting the sealing amount of the liquid 38 to 30% to 70% of the volume of the annular chambers 33 and 34. In the present embodiment, the sealing amount of the liquid 38 is set to about 55% of the volume of the annular chambers 33, 34.

In the present embodiment, the balancer device 7 is set to have an outer diameter

And a height of 74 mm. The movement of the liquid 38 in the annular chambers 33, 34 is restricted by the first partition walls 36a, 37a, the second partition walls 36b, 37b, and the third partition walls 36c, 37 c.

In the balancer device 7 having the above-described configuration, when the washing and dehydrating tub 4 to which the balancer device 7 is attached rotates, the liquid 38 in the annular chambers 33 and 34 flows through the flow path constituted by the spaces 57a and 58a and the grooves 55a and 56a, the flow path constituted by the spaces 57b and 58b and the grooves 55b and 56b, and the flow path constituted by the spaces 57c and 58c and the grooves 55c and 56c, and when unbalance occurs in the washing and dehydrating tub 4, the liquid 38 in the annular chambers 33 and 34 moves to a position where the unbalance is eliminated, wherein the spaces 57a and 58a are formed by the first partition walls 36a and 37a, the spaces 57b and 58b are formed by the second partition walls 36b and 37b, and the spaces 57c and 58c are formed by the third partition walls 36c and 37 c.

In particular, the flow path formed by the spaces 57a and 58a and the grooves 55a and 56a is formed wide, and the spaces 57a and 58a are formed by the first partition walls 36a and 37 a. In addition, the first partition walls 36a, 37a are formed much more in the ring body 30. With this configuration, the liquid 38 in the annular chambers 33 and 34 can be moved more efficiently.

On the other hand, the movement of the liquid 38 to the outer peripheral side in the annular chambers 33 and 34 by the centrifugal force of the rotation of the washing and dehydrating tub 4 is restricted by the second partition walls 36b and 37b and the third partition walls 36c and 37c, and is held at a position where the unbalance is eliminated to maintain the vibration suppressing effect. In particular, the second partition walls 36b and 37b having the above-described shapes provide a large effect of restricting the movement of the liquid 38 in a state where the liquid 38 in the annular chambers 33 and 34 moves to the outer peripheral side as the washing and dehydrating tub 4 rotates and rises. Further, the third partition walls 36c and 37c having the above-described shapes provide a large effect of restricting the movement of the liquid 38 in a state where the rotation of the washing and dehydrating tub 4 is in the middle of rising and the liquid 38 is in the middle of moving toward the outer peripheral side.

Hereinafter, the amplitude of the vibration of the washing and dehydrating tub during dehydration of the washing machine 100 to which the balancer device 7 of the present embodiment is attached is compared with the amplitude of the vibration of the washing and dehydrating tub during dehydration of the washing machine to which the balancer devices of the two comparative examples are attached.

Fig. 6 is a sectional view of the first partition walls 36a, 37a of the balancer device 7 of the present embodiment. The balancer device 7 is set to: the distance H1 between the liquid surface and the upper ends of the inner peripheral portions 36a-2 and 37a-2 of the first partition walls 36a and 37a (the bottoms of the groove portions 55a and 56 a) is 15mm, the height H2 in the annular chambers 33 and 34 is 70mm, and the inner diameter of the balancer device 7 is set to be equal to

And the radial width W2 of the annular body 30 is 33 mm. In the balancer device 7 of the present embodiment, H1/H2 is 0.21.

Fig. 7 is a sectional view of a first partition wall of the balancer device of comparative example 1. The balancer device of comparative example 1 was set to: the distance between the liquid surface and the upper end of the inner peripheral portion of the first partition wall is H71 to 5mm, the height in the annular chambers 733 and 734 is H72 to 70mm, and the inner diameter of the balancer device is set to 70mm

And the radial width W4 of the ring body 730 is 33 mm. In the balancer device of comparative example 1, H71/H72 was 0.07.

Fig. 8 is a sectional view of a first partition wall of the balancer device of comparative example 2. The balancer device of comparative example 2 was set to: distance between liquid surface and upper end of inner peripheral side portion of first partition wallThe distance is H81-5 mm, the height in the annular chambers 833, 834 is H82-70 mm, and the inner diameter of the balancer device is

And the radial width W6 of ring 830 is 44.5 mm. In the balancer device of comparative example 2, H81/H82 was 0.07.

Fig. 9 is a characteristic diagram showing the amplitude of the washing and dehydrating tub 4 according to the balancer device 7 of the washing machine 100 of the present embodiment shown in fig. 6. Fig. 9 is a characteristic diagram showing the amplitude of the washing and dehydrating tub in the balancer device of the washing machine of comparative example 1 shown in fig. 7. Fig. 11 is a characteristic diagram showing the amplitude of the washing and dehydrating tub in the balancer device of the washing machine of comparative example 2 shown in fig. 8.

The balancer device of comparative example 1 shown in fig. 7 is formed such that the inner peripheral side portion of the first partition wall is higher than the inner peripheral side portions 36a-2 and 37a-2 of the first partition wall of the balancer device 7 of the present embodiment shown in fig. 6, and the flow path of the fluid is formed to be narrow. In the balancer device of comparative example 1, as shown in fig. 9, even if the rotation speed of the washing and dehydrating tub at the time of dehydration is 200rpm to 300rpm, the liquid cannot move to the opposite side of the unbalance (delay 180 degrees) and can move only to the delay of about 120 degrees to 150 degrees with respect to the correction delay of the unbalance generated in the washing and dehydrating tub after the dehydration is started. Therefore, the amplitude of the vibration of the washing and dehydrating tub becomes large.

In the balancer device of comparative example 2 shown in fig. 8, the distance H1 between the liquid surface and the upper end of the inner peripheral portion of the first partition wall is equal to that in comparative example 1, but the inner diameter (D5) of the balancer device is smaller than that in comparative example 1 shown in fig. 7, and the width (W6) of the ring body 30 in the radial direction is wider. According to this structure, the flow path of the fluid in comparative example 2 is formed wider than that of comparative example 1. In the balancer device of comparative example 2, the liquid smoothly moves after the start of dehydration, and the liquid in the ring body 30 can move to the opposite side of the unbalance (delayed by 180 degrees) at the dehydration rotation speed of 200 rpm. This makes it possible to reduce the amplitude when the rotation speed of the washing and dehydrating tub is 200rpm to 300rpm, and to maintain the liquid in the ring body 30 in a state opposite to the unbalance even in the subsequent dehydrating step.

However, since the inner diameter (D5) of the balancer device of comparative example 2 is small, the workability of putting in and out the laundry is reduced.

The balancer device 7 of the present embodiment shown in fig. 6 has an inner diameter (D1) larger than that of the balancer device of comparative example 2. With this configuration, the laundry loading/unloading operability can be improved as compared with the washing machine using the balancer device of comparative example 2.

Further, although the balancer device 7 of the present embodiment is formed to have a narrow radial width, the distance H1 between the upper end of the inner peripheral portion of the first partition wall and the liquid surface is formed to be larger than H71 in comparative example 1 and H81 in comparative example 2, and the flow path of the fluid is formed to be wider.

With this configuration, the balancer device 7 of the present embodiment smoothly moves the liquid after the start of dehydration, and the liquid in the annular body 30 can move to the opposite side of the unbalance (delayed by 180 degrees) when the dehydration rotation speed is 200rpm, so that the amplitude can be reduced when the rotation speed is 200rpm to 300rpm, and the liquid in the annular body 30 can be kept in the opposite direction of the unbalance even in the subsequent dehydration step.

Further, if the distance H1 between the liquid surface and the upper ends of the inner peripheral side portions 36a-2 and 37a-2 of the first partition walls 36a and 37a is made too large, for example, if H1 is made 20mm or more, the liquid flows more easily, but the liquid also moves easily after the rotation speed at the time of dehydration is 200rpm, and it is impossible to maintain the state where the liquid is on the opposite side of the unbalance (delayed by 180 degrees). Therefore, the liquid may be vibrated to increase the amplitude of the washing and dehydrating tub.

In addition, when the width Wa of the grooves 55a and 56a formed by the first partition walls 36a and 37a, the width Wb of the grooves 55b and 56b formed by the second partition walls 36b and 37b, and the width Wc of the grooves 55c and 56c formed by the third partition walls 36c and 37c are set to be smaller than 4mm, respectively, the flow path of the liquid 38 becomes narrow even when the distance H between the liquid surface and the upper ends (bottoms of the grooves 55a and 56 a) of the inner peripheral side portions 36a-2 and 37a-2 of the first partition walls 36a and 37a is 10mm to 20mm, and the liquid 38 cannot smoothly move during dehydration, and the variation in movement of the liquid 38 becomes large. Therefore, the width Wa of the grooves 55a and 56a formed by the first partition walls 36a and 37a, the width Wb of the grooves 55b and 56b formed by the second partition walls 36b and 37b, and the width Wc of the grooves 55c and 56c formed by the third partition walls 36c and 37c are preferably 4mm or more.

In the washing machine 100 according to the embodiment of the present invention, the washing and dehydrating tub and the balancer device 7 may have the following configurations. Next, another configuration example of the washing and dehydrating tub and the balancer device 7 in the washing machine 100 according to the embodiment of the present invention will be described with reference to fig. 12 to 16.

Fig. 12 is a perspective view showing a washing and dehydrating tub according to another configuration example of the washing machine 100 according to the embodiment of the present invention. Fig. 13 is a plan view of the balancer device 7 according to another configuration example of the washing machine 100 according to the embodiment of the present invention, as viewed from above.

The balancer device 7 according to another configuration example of the washing machine 100 of the present embodiment is set to have an outer diameter

The height is 74 mm. In addition, as shown in fig. 12, the inner peripheral shape of the balancer device 7 has the following shape: the radial width W1 of the ring body 30 at the position above the filter 12 is wider than the radial width W2 of the ring body 30 at the position displaced by 90 degrees from the position above the filter 12.

In the balancer device 7 according to another configuration example of the washing machine 100 of the present embodiment, the radial width W1 of the upper position of the filter 12 is set to 37mm and the inner diameter, which is the interval between the upper position of the filter 12 and the position opposed to 180 degrees, is set to 396mm with respect to the annular body 30. Further, regarding the annular body 30, the radial width W2 of the annular body 30 at the position displaced by 90 degrees from the position where the filter 12 is disposed is set to 33mm, and the inner diameter, which is the interval between the position displaced by 90 degrees from the position where the filter 12 is disposed and the position opposed to 180 degrees, is set to 404 mm.

The annular body 30 is formed such that the inner diameter of a portion having a large radial width is smaller than the inner diameter of a portion having a small radial width. The liquid flow ports formed between the partition walls 36 and 37 and the side walls of the annular chambers 33 and 34 (the liquid flow ports formed by the grooves 55a, 56a, 55b, 56b, 55c and 56c and the spaces 57a, 58a, 57b, 58b, 57c and 58 c) are also formed so that the liquid flow ports in the radial direction wide portions in the annular chambers are larger than the liquid flow ports in the radial direction narrow portions in the annular chambers. In the annular body 30, injection ports for injecting liquid into the annular chambers 33 and 34 are formed at positions where the radial width dimension is formed wide.

As for the inner peripheral shape of the annular body 30, when the annular body 30 shown in fig. 13 is viewed from above, a portion of the annular body 30 located above the filter 12 is a short diameter, and a portion of the annular body 30 located 90 degrees from the upper position of the filter 12 is a substantially elliptical shape having a long diameter, and the diameter is configured to gradually change from the upper position of the filter 12 to the position located 90 degrees therefrom. In addition, an ellipse having a substantially elliptical shape does not mean an ellipse which is geometrically strict.

Fig. 14 is a graph showing the amplitude of vibration during dehydration in washing and dehydrating tub 4 of washing machine 100 according to the embodiment of the present invention. Fig. 15 is a graph showing the amplitude of the water in the washing and dehydrating tub to which the conventional balancer device shown in fig. 17 is attached. In the conventional balancer device shown in fig. 17, the inner peripheral shape of the annular body 543 is circular, the inner diameter is 381mm, and the radial width of the annular body 543 is 44.5 mm. Fig. 16 is a graph showing the amplitude of water removal in a washing and dewatering tub to which the balancer device shown in fig. 17 is attached, the width of which in the radial direction is made narrow. The inner circumference of the annular body 543 of the balancer device in which the radial width is formed to be narrow is circular, the inner diameter is 404mm, and the radial width of the annular body 543 is 33 mm.

As shown in fig. 15, the amplitude at 200rpm to 300rpm of the amplitude at the time of dehydration in the washing and dehydrating tub to which the conventional balancer device is attached is slightly increased, but the vibration suppression effect is sufficient. However, since the inner diameter of the annular body 543 is small, there is a problem that it is difficult to take out and put in laundry.

On the other hand, fig. 16 shows a conventional balancer device in which the width in the radial direction is made narrow in the washing and dewatering tub having the amplitude of vibration during dewatering. The inner diameter of the washing and dewatering tub provided with the conventional balancer device having the narrow width in the radial direction is larger than that of the conventional balancer device shown in fig. 17, and therefore, the laundry can be easily taken out and put in. However, as shown in fig. 16, in the washing and dehydrating tub to which the balancer device having a narrow width dimension in the radial direction of the balancer device is attached, the amplitude at 200rpm to 300rpm becomes high, and the vibration suppression effect is reduced.

On the other hand, as shown in fig. 14, in the washing and dehydrating tub 4 to which the balancer device 7 according to the other configuration example of the present embodiment is attached, the amplitude of the vibration at 200rpm to 300rpm in particular can be reduced, and a high vibration suppression effect can be obtained.

In general, in the washing and dehydrating tub 4, since the filter 12 protrudes toward the inner surface side of the washing and dehydrating tub 4, the laundry is easily caught by the filter 12, and the laundry is easily unevenly distributed in the vicinity of the filter 12.

The balancer device 7 according to another configuration example of the present embodiment is configured such that: the width of the annular body 30 in the radial direction at a position above the filter 12 where the laundry is likely to be unevenly distributed is wider than the width of the annular body 30 in the radial direction at a position shifted by 90 degrees from the position above the filter 12. With this configuration, the amount of liquid that moves to the portion of the annular body 30 where the width dimension in the radial direction is set to be large can be made larger than the amount of liquid that moves to the other portion of the annular body 30, and the unbalanced state can be easily corrected. This makes it possible to move a large amount of liquid to the side opposite to the position where the laundry is deflected, and in particular, to reduce the amplitude when the rotation speed is 200rpm to 300 rpm.

Further, if the width dimension in the radial direction of the annular body 30 of the balancer device 7 is made narrow, the rigidity of the balancer device 7 becomes weak, and therefore the amount of deformation of the washing and dehydrating tub 4 during dehydration becomes large, and there is a possibility that the washing and dehydrating tub 4 easily rubs against the outer tub 3. In particular, the weight of the portion of the washing and dehydrating tub 4 where the filter 12 and the filter fixing frame 14 are attached becomes heavy, and the deformation amount of the washing and dehydrating tub 4 becomes large at the time of dehydrating.

The balancer device 7 according to another configuration example of the present embodiment is formed by: since the radial width of the upper portion of the filter 12 of the annular body 30 is wider than the width of the other portion of the annular body 30, the rigidity of the balancer device 7 can be increased in the portion where the amount of deformation of the washing and dewatering tub 4 is large. In addition, variation in rigidity in the washing and dehydrating tub 4 can be suppressed, and deformation of the washing and dehydrating tub 4 during dehydration can be suppressed.

As described above, in the washing machine 100 of the present embodiment, when the balancer device 7 according to the other configuration example of the present embodiment is used, a high vibration suppression effect can be obtained without changing the size of the washing and dehydrating tub 4 of the washing machine 100, and the washing machine 100 with easy laundry removal operability can be obtained.

As described above, the washing machine 100 according to the embodiment of the present invention includes: a housing 1; an outer tub 3 supported in the housing 1; a washing and dewatering tank 4 rotatably disposed in the outer tank 3; and a balancer device 7 disposed above the washing and dewatering tub 4.

In the washing machine 100 according to the embodiment of the present invention, the balancer device 7 includes the ring body 30. The annular body 30 has annular chambers 33, 34 in which liquid is sealed, and partition walls 36, 37 for forming liquid flow paths on the inner peripheral sides in the annular chambers 33, 34 are disposed in the annular chambers 33, 34. The partition walls 36 and 37 have various shapes, and the partition walls 36 and 37(36a, 37a, 36b, 37b, 36c, and 37c) having various shapes are disposed in the annular chambers 33 and 34 in a predetermined arrangement.

According to this configuration, since the movement of the liquid that moves to the outer peripheral side in the annular chambers 33 and 34 due to the rotation of the washing and dehydrating tub 4 can be restricted, when unbalance occurs in the washing and dehydrating tub 4, the liquid in the annular chambers 33 and 34 can be effectively moved to a position where the unbalance is eliminated. Thus, a high vibration suppression effect can be obtained without changing the size of the washing and dewatering tank, and the laundry taking-out operability can be improved.

In the washing machine 100 according to the embodiment of the present invention, the partition walls 36 and 37 having various shapes may include first partition walls 36a and 37a for forming a liquid flow path above and on the inner peripheral side in the annular chambers 33 and 34, and second partition walls 36b and 37b for forming an inner surface on the outer peripheral side in the annular chambers 33 and 34. In addition, the predetermined arrangement of the partition walls 36 and 37 having various shapes may include the following arrangement: at least one second partition wall 36b, 37b is arranged between the two first partition walls 36a, 37 a. According to this configuration, when the liquid moves to the outer peripheral side in the annular chambers 33 and 34 by the centrifugal force in the rotating state of the washing and dehydrating tub 4, the outer peripheral side portions (portions in contact with the inner surfaces on the outer peripheral side in the annular chambers 33 and 34) 36b-1 and 37b-1 of the second partition walls 36b and 37b function to restrict the movement of the liquid, and therefore, the unbalance can be effectively corrected. Thus, a high vibration suppression effect can be obtained without changing the size of the washing and dewatering tank, and the taking-out operability of clothes and the like can be improved.

In the washing machine 100 according to the embodiment of the present invention, the partition walls 36 and 37 having various shapes may have the first partition walls 36a and 37a for forming the liquid flow path above the inside of the annular chambers 33 and 34, and the third partition walls 36c and 37c having the shapes such that the amount of projection from the outer peripheral side of the inside of the annular chambers 33 and 34 increases toward the lower side of the annular chambers 33 and 34. The predetermined configuration may include the following configurations: at least one third partition wall 36c, 37c is arranged between the two first partition walls 36a, 37 a. According to this configuration, the third partition walls 36c and 37c function to restrict the movement of the liquid that moves to the outer peripheral side by the centrifugal force in the process of the increase in the rotation speed of the washing and dehydrating tub 4, and therefore, the unbalance can be effectively corrected. Thus, a high vibration suppression effect can be obtained without changing the size of the washing and dewatering tank, and the taking-out operability of clothes and the like can be improved.

In the washing machine 100 according to the embodiment of the present invention, the heights of the inner peripheral side portions (portions in contact with the inner surfaces of the inner peripheral sides in the annular chambers 33, 34) 36a-2, 37a-2, 36b-2, 37b-2, 36c-2, and 37c-2 of the partition walls 36, 37(36a, 37a, 36b, 37b, 36c, and 37c) having various shapes may be formed to be substantially the same height. With this configuration, the liquid in the annular chambers 33 and 34 can be smoothly moved, and thus the unbalance in the washing and dehydrating tub 4 can be more effectively eliminated.

In the washing machine 100 according to the embodiment of the present invention, the outer peripheral side portions (portions that contact the inner surfaces on the outer peripheral side in the annular chambers 33, 34) 36a-1, 37a-1, 36b-1, 37b-1, 36c-1, and 37c-1 of the partition walls 36, 37(36a, 37a, 36b, 37b, 36c, and 37c) having various shapes may be formed higher than the inner peripheral side portions 36a-2, 37a-2, 36b-2, 37b-2, 36c-2, and 37c-2, respectively. Further, grooves 55a, 56a, 55b, 56b, 55c, and 56c may be formed between the inner surface of the outer peripheral side portions 36a-1, 37a-1, 36b-1, 37b-1, 36c-1, and 37c-1 in the annular chambers 33 and 34. The widths of the grooves 55a, 56a, 55b, 56b, 55c, and 56c formed by the partition walls 36 and 37(36a, 37a, 36b, 37b, 36c, and 37c) having various shapes may be substantially the same. According to this configuration, when unbalance occurs in the washing and dehydrating tub 4, the liquid can be efficiently moved to a position where the unbalance is eliminated, so that a high vibration suppression effect can be obtained without changing the size of the washing and dehydrating tub, and the taking-out operability can be improved.

In the washing machine 100 according to the embodiment of the present invention, the balancer device 7 may be configured such that the inner circumferential shape of the annular body 30 is a substantially elliptical shape having a short diameter and a long diameter when viewed from above in a plan view. With this configuration, the inner diameter of the annular body 30 can be increased without reducing the vibration suppression effect without changing the size of the washing and dehydrating tub of the washing machine. Thus, a washing machine capable of obtaining a high vibration suppression effect without changing the size of a washing and dewatering tub of the washing machine and improving the laundry taking-out operability can be provided.

In the washing machine 100 according to the embodiment of the present invention, the filter 12 for removing lint may be disposed in the washing and dewatering tub 4, and the annular body 30 may include: the width in the radial direction at a position above the position where the filter 12 is disposed is formed to be wider than the width in the radial direction of the other portion of the annular body 30 (for example, a position shifted by 90 degrees from the position above the position where the filter 12 is disposed). With this configuration, a large amount of liquid can move to the portion of the annular body 30 where the width in the radial direction is wide, and imbalance caused by uneven distribution of the laundry in the washing and dewatering tub 4 can be easily corrected. Further, the weight of the portion of the washing and dehydrating tub 4 where the filter 12 and the filter fixing frame 14 are attached becomes heavy, and the amount of deformation of the washing and dehydrating tub 4 becomes large at this portion during dehydration, and there is a possibility that the washing and dehydrating tub 4 is easily rubbed against the outer tub 3. In this regard, in the balancer device 7 of the washing machine 100 according to the embodiment of the present invention, the radial width dimension of the annular body 30 at the position above the filter 12 is wider than the radial width dimension of the annular body 30 at the position displaced by 90 degrees from the position above the filter 12, so that the rigidity of the balancer device 7 can be increased in the portion where the amount of deformation of the washing and dehydrating tub 4 is large, and the variation in rigidity in the washing and dehydrating tub 4 can be suppressed. This can suppress deformation of the washing and dehydrating tub 4 during dehydration, and can provide a washing machine having a high vibration suppression effect and an improved laundry removal operation.

In the washing machine 100 according to the embodiment of the present invention, the annular body 30 may be provided with an injection port for injecting the liquid into the annular body 30 at a portion where the width dimension in the radial direction is formed to be wide. According to this structure, since the influence on the liquid flow path width (influence such as narrowing of the liquid flow path width) due to the provision of the liquid injection port is reduced, the liquid is easily flowed in the annular body 30. Thus, the washing machine with high vibration suppression effect and small rigidity deviation in the washing and dehydrating tub 4 can be provided without changing the size of the washing and dehydrating tub of the washing machine.

Industrial applicability

As described above, the present invention can provide a washing machine which can obtain a high vibration suppression effect without changing the size of a washing and dehydrating tub of the washing machine and improve the laundry taking-out operability. Therefore, the present invention can be widely used in various household and business washing machines, washing and drying machines, and the like.

Description of the reference numerals

1: a housing; 3: an outer tank; 4: a washing and dewatering tank; 4 a: a water through hole; 5: a shaft; 6: an impeller; 7: a balancer device; 8: an electric motor (drive unit); 9: a clutch; 10: an inclined surface; 11: a stirring protrusion; 12: a filter; 13: an outer tank cover; 14: a filter fixing frame; 15: a drain hose; 16: a frame base; 17: a water supply valve; 18: a detergent storage part; 19: an operation section; 20: a detergent dissolving part; 21: a water supply member; 22: an upper frame body; 23: an outer cover; 24: a support member; 30: an annular body; 31. 41: an upper annular housing; 32. 42: a lower annular housing; 33. 34: an annular chamber; 35: a partition wall; 36. 37: a partition wall; 36a, 37 a: a first partition wall; 36b, 37 b: a second partition wall; 36c, 37 c: a third partition wall; 36a-1, 37 a-1: an outer peripheral side portion (first partition wall); 36b-1, 37 b-1: an outer peripheral side portion (second partition wall); 36c-1, 37 c-1: an outer peripheral side portion (third partition wall); 36a-2, 37 a-2: an inner peripheral side portion (first partition wall); 36b-2, 37 b-2: an inner peripheral side portion (second partition wall); 36c-2, 37 c-2: an inner peripheral side portion (third partition wall); 38: a liquid; 55a, 56a, 55b, 56b, 55c, 56 c: a groove part; 57a, 58a, 57b, 58b, 57c, 58 c: a space.

Claims (7)

1. A washing machine is provided with:

a washing and dewatering tank; and

a balancer device having an annular body disposed at the upper part of the washing and dewatering tank,

wherein the annular body has an annular chamber in which a liquid is sealed, a partition wall for forming a flow path for the liquid on an inner peripheral side in the annular chamber is disposed in the annular chamber, the partition wall has a plurality of shapes, the partition walls having the plurality of shapes are disposed in the annular chamber in a predetermined arrangement, and

a filter for removing lint is disposed in the washing and dewatering tub, and the annular body having a liquid sealed therein has: the width in the radial direction at a position above the position where the filter is disposed is formed to be wider than the width at the other position of the annular body.

2. The washing machine as claimed in claim 1,

the partition walls having the plurality of shapes include a first partition wall for forming a flow path for the liquid above and on the inner peripheral side in the annular chamber, and a second partition wall for forming an inner surface on the outer peripheral side in the annular chamber, and the predetermined arrangement includes an arrangement in which the second partition wall is disposed between two of the first partition walls.

3. The washing machine as claimed in claim 1,

the partition wall having the plurality of types of shapes includes a first partition wall for forming the flow path of the liquid above the annular chamber, and a third partition wall having a shape in which a protruding amount of the third partition wall from an inner wall on an outer peripheral side of the annular chamber increases toward a lower side in the annular chamber, and the predetermined arrangement includes an arrangement in which the third partition wall is disposed between two first partition walls.

4. A washing machine according to claim 2 or 3,

the partition walls having the plurality of shapes are formed to have substantially the same height at the inner peripheral side portion thereof which is in contact with the inner surface of the inner peripheral side in the annular chamber.

5. A washing machine according to claim 2 or 3,

an outer peripheral side portion of the partition wall having the plurality of types of shapes, which is in contact with the inner surface on the outer peripheral side in the annular chamber, is formed higher than an inner peripheral side portion, which is in contact with the inner surface on the inner peripheral side in the annular chamber, a groove portion is formed between the inner surface on the inner peripheral side of the outer peripheral side portion in the annular chamber and the inner surface on the inner peripheral side in the annular chamber, and widths of bottoms of the groove portions are formed to be substantially the same size.

6. The washing machine as claimed in claim 1,

the annular body is configured such that an inner peripheral shape thereof is an elliptical shape having a short diameter and a long diameter in a plan view.

7. The washing machine as claimed in claim 1,

the annular body is provided with the liquid inlet at a portion where the width in the radial direction is formed wide.

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