TWI710684B - washing machine - Google Patents

Abstract

The balance device has an annular chamber formed in two layers in the radial direction of the balance device, and each annular chamber has a plurality of partition walls radially inside each. The partition wall is composed of a cross-cut part, a slightly vertical part, and an inclined part. The cross-cut part is a cross-cut part that crosses the upper part of the annular chamber. The slightly-vertical part is connected to the cross-cut part and only has a predetermined height. A substantially vertical portion extending longitudinally, and the inclined portion is an inclined portion extending obliquely from the lower end of the substantially vertical portion toward a predetermined height position from the inner bottom of the circumferential side of the annular chamber. As a result, the inner diameter of the balance device can be sufficiently ensured, the workability of taking out the laundry can be ensured, and the vibration suppression effect can be exerted.

Description

washing machine

Invention field

The present invention relates to a washing machine that performs a series of actions such as washing, rinsing, and dehydrating.

Background of the invention

In the past, in order to suppress vibration during dehydration, a washing machine with a balance device on the upper part of the washing and dehydration tank has been proposed in, for example, Japanese Patent Laid-Open No. 6-79087 (hereinafter referred to as "Patent Document 1").

The balance device of the washing machine described in Patent Document 1 is formed by welding and sealing an upper ring tank and a lower ring tank, and a predetermined amount of liquid is enclosed in the ring body. When the liquid in the ring body is unbalanced due to the shift of the clothes in the washing and dehydration tank, it will move to the side opposite to the shifting direction of the clothes. This suppresses the vibration of the washing and dehydration tank.

In the balance device, as the rotation of the washing and dehydration tank during dehydration rises, the liquid in the ring body moves later than the increase in the rotation speed. That is, when the liquid in the ring body rotates stably, it will be delayed by 180°. Therefore, especially in stable rotation, a relatively large vibration suppression effect can be obtained. At this time, according to the above principle, if the height dimension of the ring body or the radial width dimension of the ring body is set to be larger, greater vibration suppression can be obtained. 制 effect.

However, the balancing device is installed in the upper part of the washing and dehydrating tank. Therefore, the outer diameter of the balancing device will be limited by the size of the washing and dewatering tank, and the inner diameter will be limited by the size that takes the in and out of the laundry into consideration. Furthermore, the height of the balancing device is limited by the height of the product and the volume of the washing and dehydrating tank. Therefore, the conventional washing machine is provided with a balance device divided into multiple annular chambers as described below using FIG. 12.

Fig. 12 is a perspective view showing the main parts of the balancing device of the conventional washing machine.

As shown in FIG. 12, the conventional balancing device 40 is formed of a ring body 43, and the ring body 43 is composed of an upper ring box 41 and a lower ring box 42.

The upper ring box 41 includes ring-shaped upper partition walls 47 and 48 that are provided in a concentric shape. The lower annular box 42 includes lower partition walls 50 and 51 that abut the lower ends of the upper partition walls 47 and 48.

The upper partition walls 47, 48 and the lower partition walls 50, 51 are annular chambers 44, 45, 46 that partition the inside of the annular body 43 into three layers in the radial direction. A predetermined liquid (not shown) is enclosed in the annular chambers 44, 45, and 46.

The annular chambers 44, 45, and 46 have a plurality of upper partition walls 49a, 49b, 49c formed radially from the outer peripheral side wall on the upper side wall of the outer peripheral side. Between the upper partition walls 49a, 49b, 49c and the side walls on the inner peripheral side of the respective annular chambers 44, 45, 46, air circulation ports 53a, 53b, 53c through which air can circulate are formed.

In addition, the respective annular chambers 44, 45, 46 are on the lower side of the outer peripheral side The wall has lower partition walls 52a, 52b, 52c. Between the lower partition walls 52a, 52b, 52c and the side walls of the inner peripheral walls of the respective annular chambers 44, 45, 46, liquid flow ports 54a, 54b, 54c are formed, and these liquid flow ports can be sealed in the annular chamber 44, 45, 46 liquid circulation.

The balance device 40 configured as above is installed on the upper part of the washing and dehydrating tank (not shown) as described above. Then, during washing, when rotation is caused by the unbalanced state of the laundry in the washing and dehydration tank, the liquid in the balancing device 40 moves in the liquid circulation ports 54a, 54b, 54c to the unbalanced state. position. At this time, as the liquid moves, the air in the annular chambers 44, 45, and 46 will move through the air circulation ports 53a, 53b, and 53c of the upper annular box 41. Thereby, the liquid moves smoothly in the liquid circulation ports 54a, 54b, and 54c. As a result, the vibration of the washing and dehydration tank can be suppressed.

However, in conventional washing machines, especially near the secondary resonance point where the rotation speed of the washing and dehydrating tank is 200-300 r/min, the washing and dehydrating tank will vibrate greatly. At this time, the liquid in the balancing device will also move significantly. Therefore, the vibration suppression effect in the balance device is reduced.

Summary of the invention

The present invention provides a washing machine that exhibits an excellent vibration suppression effect, especially when the rotation speed of the washing and dehydration tank is near the secondary resonance point of 200-300 r/min.

The washing machine of the present invention is provided with a washing machine body and a shockproof The water tank supported inside the washing machine body, the washing and dehydrating tank rotatably enclosed in the water tank, the motor that drives the washing and dehydrating tank rotatably, the control unit that controls the motor and controls a series of steps such as washing, rinsing, and dehydration one by one, And a balancing device arranged on the upper peripheral edge of the washing and dehydrating tank. The balance device has a ring-shaped chamber in which a liquid is enclosed. The ring-shaped chamber has a plurality of partition walls inside, and the partition walls have at least an inclined portion that slopes downward from the outer circumferential side of the ring to the inner circumferential side of the ring. Moreover, the inclination angle of the inclined portion from the horizontal plane is set to be substantially the same as the inclination angle of the liquid from the horizontal plane. The above-mentioned liquid inclination angle from the horizontal plane is the rotation speed near the secondary resonance point of the washing and dehydration tank Among them, the inclination angle when the liquid is inclined toward the annular outer peripheral wall surface due to centrifugal force.

With this, especially when the rotation speed of the washing and dehydrating tank is near the secondary resonance point of 200 to 300 r/min, for example, an excellent vibration suppression effect can be exerted.

1: Washing machine body

2: hanger

3: sink

4: Laundry and dehydration tank

5: Washing/dehydration shaft

6: cover

7, 107, 207: balance device

8: Motor

9: Communication agency department

11: agitator

12: Upper frame

13: The washing is put into the outlet

16: Operation display

17: Drain valve

18: Drain pipe

19: Sink unit

20: inner wall

21, 22: Ministry of Space

23: Peripheral wall

30, 43, 135, 235: ring

31, 41: upper ring box

32, 42: Lower ring box

33, 34, 44, 45, 46, 133, 134, 233, 234: ring room

33a, 34a: inner bottom

35: dividing wall

36, 37, 136, 137, 236, 237: next door

36a, 37a, 36d, 37d: cross section

36b, 37b: vertical part

36c, 37c: inclined part

36b1, 37b1: lower end

38: Liquid

38a: Liquid level

40: balance device

47, 48: upper dividing wall

49a, 49b, 49c: next door to the upper part

50, 51: lower partition wall

52a, 52b, 52c: the lower part

53a, 53b, 53c: air circulation port

54a, 54b, 54c: liquid flow port

136a, 137a, 236a, 237a: upper and lower end

H1: water level, distance

H2: Internal dimension height

H3, H4: predetermined height

W1, W2: width size

Fig. 1 is a longitudinal sectional view of the washing machine of the embodiment.

Figure 2 is a perspective view of the main parts of the balancing device of the washing machine in perspective.

Fig. 3 is a cross-sectional view of the position of the side wall of the balancing device of the washing machine.

Fig. 4 is a cross-sectional view of the position of the partition wall of the balancing device when the washing machine is stopped.

Fig. 5 is a cross-sectional view of the position of the side wall of the balancing device when the washing machine rotates stably without load.

Figure 6 is the same time as the secondary resonance of the washing machine A cross-sectional view of the location of the balance device next door.

Fig. 7 is a characteristic diagram showing the amplitude of the vibration system of the same washing machine during dehydration.

8 is a cross-sectional view of the position of the partition wall of the balancing device of the conventional washing machine of Comparative Example 1. FIG.

9 is a characteristic diagram showing the amplitude of the vibration system of the conventional washing machine of Comparative Example 1 during dehydration.

10 is a cross-sectional view of the position of the partition wall of the balancing device of the conventional washing machine of Comparative Example 2. FIG.

FIG. 11 is a characteristic diagram showing the amplitude of the vibration system of the conventional washing machine during dehydration of Comparative Example 2. FIG.

Fig. 12 is a perspective view showing the main parts of the balancing device of the conventional washing machine.

Detailed description of the preferred embodiment

Hereinafter, the embodiments will be described in detail while referring to appropriate drawings. However, detailed explanations beyond necessary are sometimes omitted. For example, detailed descriptions of well-known items or repeated descriptions of substantially the same structure may be omitted. This is to prevent the following description from becoming unnecessarily lengthy and to make it easy for those skilled in the art to understand.

In addition, the attached drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the scope of the patent application by these.

(Implementation form)

Hereinafter, with respect to the washing machine of the embodiment, each component will be explained item by item using FIGS. 1 to 11.

[1-1. Composition of washing machine]

First, the structure of the washing machine of the embodiment will be described using FIG. 1.

Fig. 1 is a longitudinal sectional view of the washing machine of the embodiment.

As shown in FIG. 1, the washing machine of the embodiment is composed of a washing machine main body 1, an upper frame body 12, a sink unit 19 enclosed in the washing machine main body 1, and the like.

The water tank unit 19 includes a water tank 3, a washing and dehydrating tank 4, a balance device 7, a motor 8, a transmission mechanism 9 and the like, and constitutes a vibration system of the washing machine.

The sink 3 inside the washing machine body 1 is supported by a hanger 2 in a suspension state to be shockproof. The water tank 3 is provided with a switchable drain valve 17 at the inner bottom. The drain valve 17 is opened when draining water, and the water in the water tank 3 is discharged out of the machine through the drain pipe 18.

The water tank 3 has a bottomed cylindrical washing and dehydrating tank 4 inside which is arranged to be rotatable. The washing and dehydration tank 4 has a plurality of dehydration holes (not shown) on the side wall. The washing and dehydrating tank 4 is provided with a balance device 7 for reducing vibration at the upper part of the inner circumference. In addition, the washing and dehydrating tank 4 has a pulsator 11 that can stir clothes at the inner bottom, and is arranged so as to be rotatable. The agitator 11 agitates the clothes in the washing and dehydration tank 4 by rotating.

The water tank 3 is provided with a transmission mechanism 9 at the outer bottom. The transmission mechanism 9 has a reduction gear (not shown in the figure) for washing, washing/removal The switching clutch (not shown in the figure) of the water shaft 5, and the brake (not shown in the figure) used to stop the washing and dehydration tank 4 during dehydration.

The motor 8 is installed at the outer bottom of the water tank 3 and transmits the driving force to the washing/dehydrating shaft 5. Thereby, the motor 8 rotates the agitator 11, or rotates the agitator 11 and the washing and dehydration tank 4 at the same time.

The control device (not shown) is arranged in the washing machine body 1. The control device controls the motor 8 and the like, and controls a series of steps such as washing, rinsing, and dehydration one by one.

The upper frame 12 is arranged on the upper part of the washing machine body 1. The upper housing 12 has an operation display unit 16 at the front. The operation display unit 16 displays various input settings or set contents made by the user.

The upper frame body 12 has a laundry input/outlet 13 in a substantially central part (including the central part). The laundry input and extraction port 13 communicates the washing and dehydration tank 4 with the outside. The laundry input/output port 13 is covered by the cover 6 so as to be openable and closable.

The cover 6 includes a handle portion (not shown in the figure) and a hinge mechanism (not shown in the figure). The handle portion is operated by the user to open and close the cover 6. The hinge mechanism can bend the cover 6 in the middle.

[1-2. Composition of balance device]

The balance device 7 is arranged on the upper part of the inner circumference of the washing and dehydrating tank 4. As described above, the balancing device 7 corrects the unbalanced state caused by the deviation of the laundry during washing.

Hereinafter, the structure of the balancing device 7 of the washing machine of the embodiment will be described using FIG. 2.

Fig. 2 is a perspective view showing the main parts of the balancing device 7 of the washing machine of the embodiment.

As shown in FIG. 2, the balance device 7 is composed of an annular body 30 in which an upper annular box 31 and a lower annular box 32 are integrated.

The integrated annular body 30 includes an annular partition wall 35 inside, and an annular inner peripheral wall 20 and an outer peripheral wall 23 outside. The annular partition wall 35 divides the inside of the annular body 30 into two layers of annular chambers 33 and 34 in the radial direction. In addition, the annular chambers 33 and 34 each have partition walls 36 and 37 inside. The partition walls 36 and 37 are radially formed from the ring center of the ring body 30 toward the radial direction, and are formed at 24 positions at an interval of, for example, 15°.

The annular chambers 33 and 34 are sealed with a liquid 38 inside. In addition, considering the antifreeze and correction effects, the liquid 38 should be an aqueous solution of sodium chloride or calcium chloride. In addition to being inexpensive, lowering the freezing point, and being used in cold areas, it can also increase the specific gravity (about 1.3). As a result, the correction power of imbalance can be improved.

In addition, the enclosed amount of the liquid 38 is preferably set within the range of 30 to 70% of the internal volume of the annular chambers 33 and 34. Thereby, it is possible to more appropriately maintain the corrective power for imbalance. In this embodiment, the enclosed amount of the liquid 38 is set to about 55% of the internal volume of the annular chambers 33 and 34.

In the rotating state of the washing and dehydrating tank 4, the liquid 38 moves in the direction of releasing the unbalanced state caused by the laundry in the annular chambers 33 and 34.

Between the partition walls 36, 37 and the inner peripheral side walls of the annular chambers 33, 34, there are formed spaces 21, which can connect the annular chambers 33, 34 in an annular shape. twenty two.

Next, the structure of the partition wall in the annular room of the balancing device of the washing machine will be described using FIGS. 3 to 5.

Fig. 3 is a cross-sectional view of the position of the side wall of the balancing device of the washing machine. Fig. 4 is a cross-sectional view of the position of the partition wall of the balancing device when the washing machine is stopped. Fig. 5 is a cross-sectional view of the position of the side wall of the balancing device when the washing machine rotates stably without load.

As shown in Figs. 3, 4, and 5, the partition walls 36 and 37 are composed of transverse sections 36a, 37a, vertical sections 36b, 37b, inclined sections 36c, 37c, and transverse sections 36d, 37d.

The cross-cutting portions 36a and 37a are formed on the upper part of the annular chambers 33 and 34, and are formed to cross from the inner wall on the outer peripheral side in the annular chambers 33 and 34 to the inner wall on the inner peripheral side. With the transverse cut portions 36a and 37a, the mechanical strength in the radial direction against the centrifugal force acting on the annular chambers 33 and 34 is improved. Therefore, it is possible to prevent the deformation of the balance device 7 when the washing and dehydrating tank 4 spins. Thereby, the balance device 7 can be operated stably.

The vertical portions 36b and 37b are connected to the cross-cut portions 36a and 37a, and are formed along the inner wall of the outer peripheral wall 23 of the annular chambers 33 and 34, and extend longitudinally only at a predetermined height. The inclined portions 36c, 37c are formed to extend obliquely from the lower ends 36b1, 37b1 of the vertical portions 36b, 37b toward predetermined heights H3, H4, and the predetermined heights H3, H4 are from the annular chamber 33 below the inner diameter side. , 34 of the predetermined height of the inner bottom 33a, 34a.

At this time, the inclination angle of the inclined portions 36c and 37c from the horizontal plane is set to be slightly the same as the inclination angle of the liquid 38 (including exactly the same). The inclination angle of the liquid 38 is the inclination angle of the liquid 38 that is inclined due to the centrifugal force during rotation of 200 to 300 r/min, which is the secondary resonance point of the water tank unit 19. In this embodiment, the inclination angles of the inclined portions 36c and 37c of the partition walls 36 and 37 are set to be approximately 80° (including 80°) with respect to the horizontal plane, for example.

In addition, the cross-cut part 36 d which comprises the partition wall 36 is provided so that it cuts across from the inner wall of the outer peripheral wall 23 toward the partition wall 35 from the inner bottom 33a of the annular chamber 33 to the predetermined height H3. Similarly, the cross-cut portion 37d constituting the partition wall 37 is provided so as to cross-cut from the partition wall 35 toward the inner wall of the inner peripheral wall 20 from the inner bottom 34a of the annular chamber 34 to the predetermined height H4. With the cross-cutting parts 36d and 37d, the strength of the annular chambers 33 and 34 can be improved like the cross-cutting parts 36a and 37a.

Next, the dimensional relationship of the partition walls in the annular room will be described using FIG. 5.

First, as shown in FIG. 5, the radial width dimension of the vertical portion 37b of the partition wall 37 is W1. Then, when the washing and dehydrating tank 4 that is dehydrated and rotated under no load is in a stable state, the radial width dimension of the liquid 38 enclosed in the annular chamber 34 is set to W2. Specifically, the width dimension of the liquid 38 when the liquid 38 is attached to the inner surface of the partition wall 35 in a state where the liquid 38 is slightly vertical (including vertical) due to centrifugal force is W2.

Furthermore, in this embodiment, the width W1 of the vertical portion 37b of the partition wall 37 is set to be W1=(W2)/2. At this time, the vertical portion 37b acts as a kind of resistance to the liquid 38 rotating and moving in the annular chamber 34. That is, in the state where there is no imbalance, the vertical portion 37b acts to hinder the movement of the liquid 38 and stays in the radially arranged Between the partition walls 37 to keep the position of the liquid 38 constant. Thereby, instability of the water tank unit 19 due to the moving liquid 38 can be prevented. In addition, since the dimensional relationship of the vertical portion 36b of the partition wall 36 in the annular chamber 33 is also the same, it is not specifically described.

Moreover, in this embodiment, as shown in FIG. 4, the internal dimension height H2 of the annular chambers 33 and 34 of the balance device 7 is set to 70 mm. Furthermore, the inner diameter of the balance device 7 (the distance from the center of rotation of the balance device 7 to the outer surface of the inner peripheral wall 20 of the ring body 30) is set to Φ404mm, and the outer diameter (the center of rotation of the balance device 7 to the ring body The distance between the outer surface of the outer peripheral wall 23 of 30) is set to Φ470 mm. That is, the radial width of the annular body 30 (the distance from the outer surface of the inner peripheral wall 20 to the outer surface of the outer peripheral wall 23) is set to 33 mm.

In addition, as shown in FIGS. 4 and 5, the annular chambers 33 and 34 each have the same amount of liquid 38 enclosed therein. That is, the water level H1 from the height H3 of the transverse section 36d of the partition wall 36 of the annular chamber 33 to the liquid surface of the liquid 38 is set to 20 mm. Similarly, the water level H1 from the height H4 of the cross section 37d of the partition wall 37 of the annular chamber 34 to the liquid surface of the liquid 38 is set to 20 mm. Thereby, at the time of the secondary resonance of the washing and dehydrating tank 4, the liquid 38 is prevented from flowing in the space 21, 22 in an unbalanced direction. As a result, the water tank unit 19 can be suppressed from being greatly shaken.

[1-3. Action, function]

Hereinafter, the operation and effect of the drum-type washing machine having the above-mentioned configuration will be described with reference to FIGS. 6 and 7.

Washing and dehydrating tank 4 with balance device 7 is in dehydration When rotating, the liquid 38 in the annular chambers 33 and 34 will flow in the spaces 21 and 22. Then, the liquid 38 moves to a position (a position opposite to the imbalance) where the unbalanced state of the sink unit 19 caused by the laundry is released. In this way, the effect is to obtain the balance of the vibration system and reduce the unbalanced vibration.

Fig. 6 is a cross-sectional view of the position of the side wall of the balancing device during secondary resonance with the washing machine. Fig. 7 is a characteristic diagram showing the amplitude of the vibration system of the same washing machine during dehydration.

As shown in Fig. 7, when the dehydration operation starts, the rotation speed of the washing and dehydration tank 4 rises from the stopped state. As the rotation speed increases, the vertical and horizontal amplitudes of the water tank unit 19 of the vibration system will increase.

In this embodiment, as shown in FIG. 3, the partition wall 36 of the annular chamber 33 is inclined slightly 80° (including 80°) downward from the inner wall of the outer peripheral wall 23 of the annular body 30 toward the partition wall 35. Similarly, the ring The partition wall 37 of the like chamber 34 is inclined slightly 80° (including 80°) downward from the partition wall 35 of the ring body 30 toward the inner surface of the inner peripheral wall 20. Thereby, the space parts 21 and 22 are also formed in the lower part of the partition walls 36 and 37 (the positions corresponding to the inclined parts 36c and 37c). Therefore, when the washing and dehydrating tank 4 starts to rotate from a stopped state, the liquid 38 flows through the space parts 21 and 22. As a result, the liquid 38 effectively moves to an unbalanced opposing position.

Then, after the rotation speed of the washing and dehydration tank 4 increases, it becomes the second resonance point of the water tank unit 19, that is, the rotation speed of 200~300r/min. Generally speaking, near the secondary resonance point, the liquid 38 in the balance device 7 will move about 90° (including 90°) delayed relative to the unbalance. However, near the secondary resonance point, the water tank unit 19 vibrates greatly. Therefore, liquid 38 It will flow in an unbalanced direction in each of the annular chambers 33 and 34. Thereby, the vibration suppression effect of the balance device 7 will be reduced.

Therefore, the balance device 7 of this embodiment, as shown in FIG. 6, is to form the inclination angles of the inclined portions 36c and 37c of the partition walls 36 and 37 so as to correspond to the inclination of the liquid 38 to the outer peripheral side caused by the centrifugal force near the secondary resonance point. Become the same degree. With the above configuration, when the washing and dehydrating tank 4 resonates twice, the liquid 38 is prevented from flowing in the space 21 and 22 in an unbalanced direction. As a result, the water tank unit 19 can be suppressed from being greatly shaken.

Next, after the rotation speed of the washing and dehydrating tank 4 is further increased from the time of the second resonance, the washing and dehydrating tank 4 will rotate stably. Here, for the sake of convenience in this specification, this state is referred to as a "stable state".

In the stable state, as shown in FIG. 5, the liquid 38 is attached to the inner surface of the outer peripheral wall 23 of the annular chamber 33 and the inner surface of the partition wall 35 of the annular chamber 34 in a slightly vertical state (including the vertical state). At this time, in the present embodiment, the width W1 of the vertical portions 36b, 37b of the partition walls 36, 37 is set to be about half of the width W2 of the liquid 38 stuck in the annular chambers 33, 34.

That is, in a stable state, when the water tank unit 19 becomes an unbalanced state, the liquid 38 in the annular chambers 33 and 34 will move to the side opposite to the unbalanced state of the water tank unit 19. Thereby, the unbalanced state of the water tank unit 19 is released, and the unbalanced vibration is suppressed.

On the other hand, in a stable state, when the water tank unit 19 is not greatly unbalanced, the transverse sections 36a, 37a, the vertical sections 36b, 37b, the inclined sections 36c, 37c, and the transverse sections 36d, 37d become Inhibitor The resistance to the rotational movement of the body 38 in the circumferential direction. Therefore, the vibration of the water tank unit 19 accompanying the movement of the liquid 38 is reduced.

That is, by making the vertical portions 36b and 37b into the above-mentioned width dimension, in a stable state, the movement of the liquid 38 in an unbalanced state becomes possible. At the same time, the vertical portions 36b and 37b restrict the movement of the liquid 38 when there is no significant imbalance.

As described above, the balancing device 7 of the washing machine of this embodiment is shown in FIG. 7, and the vibration suppression effect can be improved regardless of the rotation speed of the washing and dehydrating tank 4.

[1-4. Comparison with previous structure]

Hereinafter, the difference between the functions and effects of the balancing device 7 of the present embodiment and the balancing device of the conventional structure will be described using Comparative Example 1 and Comparative Example 2 shown in FIGS. 8 to 11.

8 to 11 are diagrams for explaining the workability of the laundry in and out of the present embodiment and the effect of reducing vibration in comparison with the conventional washing machine.

[1-4-1. Comparison with the balancing device of Comparative Example 1]

First, the difference between the function and effect of the balance device 7 of the present embodiment and the conventional balance device shown in Comparative Example 1 will be described using FIGS. 8 to 9.

8 is a cross-sectional view of the position of the partition wall of the balancing device of the conventional washing machine shown as Comparative Example 1. FIG. Fig. 9 is a characteristic diagram showing the amplitude of the vibration system during dehydration in the same comparative example.

The balancing device 107 of Comparative Example 1 is shown in FIG. The balance device 7 of the form is the same, the inner diameter 404 mm, the radial width of the ring body 135 is set to 33 mm, the outer diameter Φ470 mm, and the inner dimension height H2 of the ring chambers 133 and 134 is set to 70 mm. On the other hand, the distance H1 from the liquid surface 38a of the liquid 38 to the upper and lower ends 136a, 137a of the partition walls 136, 137 is set to 5 mm.

That is, the height of the inner circumference of the partition walls 136, 137 of Comparative Example 1 is formed to be higher than the inner circumference of the partition walls 36, 37 of the balance device 7 of the present embodiment shown in FIG. 4. Therefore, the flow path of the liquid 38 flowing in the circumferential direction in the annular chambers 133 and 134 is narrowed.

As a result, as shown in FIG. 9, after the dehydration operation is started, the correction of the amplitude of each vibration system in the unbalanced state caused by the shift of the laundry is delayed. Furthermore, even if the rotation speed of the washing and dehydration tank 4 increases and reaches the second resonance point of the water tank unit 19, which is the dehydration rotation speed of 200~300r/min, the liquid 38 cannot smoothly move to the side opposite to the imbalance (a delay of 180° )s position. Specifically, the liquid 38 can only delay movement of, for example, about 120° to 150°. As a result, as shown in FIG. 9, each amplitude of the water tank unit 19 becomes large.

[1-4-2. Comparison with the balancing device of Comparative Example 2]

Next, the difference between the functions and effects of the balancing device 7 of this embodiment and the conventional balancing device shown in Comparative Example 2 will be described using FIGS. 10 to 11.

10 is a cross-sectional view of the position of the partition wall of the balancing device of the conventional washing machine shown as Comparative Example 2. FIG. Fig. 11 is a characteristic diagram showing the amplitude of the vibration system during dehydration in the same comparative example.

The balance device 207 of Comparative Example 2 is shown in FIG. 10, and the outer diameter Φ470 mm, and the inner dimension height H2 of the annular chambers 233 and 234 is set to 70 mm, like the balance device 7 of the first embodiment. On the other hand, the inner diameter is Φ381 mm, and the radial width of the ring body 235 is set to 44.5 mm. In addition, the distance H1 from the liquid surface 38a of the liquid 38 to the upper lower ends 236a and 237a on the inner peripheral side of the partition walls 236 and 237 is set to 5 mm.

That is, in the balance device 207 of Comparative Example 2, the distance H1 from the liquid surface 38a to the upper and lower ends 236a, 237a of the partition walls 236, 237 is made the same as that of Comparative Example 1. On the other hand, the inner diameter (Φ381mm) of the balancer 207 is made smaller than the inner diameter (Φ404mm) of Comparative Example 1 shown in FIG. 7, and the radial width of the ring body 235 is made wider 44.5mm . Therefore, the flow path of the liquid 38 of Comparative Example 2 is still wide. Thereby, after the dehydration starts, the liquid 38 moves smoothly in the wider flow path. Furthermore, the rotation speed of the washing and dehydration tank 4 increases, and when the dehydration rotation speed is 200 r/min, the liquid 38 smoothly moves to the position opposite to the imbalance (delayed by 180°). As a result, as shown in FIG. 11, the vibration suppression effect at the secondary resonance point is improved.

However, the balance device 207 of Comparative Example 2 has an inner diameter reduced to Φ381 mm as described above. Therefore, the workability is reduced with respect to the in and out of the laundry in the washing and dehydrating tank 4 depending on the inner diameter. In particular, it is difficult to get in and out of large laundry items such as blankets and sheets.

In contrast, the balancing device 7 of this embodiment is shown in FIG. 4, and compared with the balancing device of Comparative Example 2, the inner diameter of the washing and dehydrating tank 4 is formed to be larger. This improves the accessibility of large laundry items.

That is, from the comparative example 1 and the comparative example 2, the balancing device 7 of the washing machine of this embodiment can achieve both the workability of washing in and out and the effect of vibration suppression.

As described above, the embodiment has been described as an example of the technology disclosed in this application. However, the technology of the present disclosure is not limited to this, and can also be applied to implementations in which changes, substitutions, additions, omissions, etc. are made.

For example, in the embodiment, although the configuration in which the partition walls 36 and 37 of the annular chambers 33 and 34 are radially formed at 15° intervals is used as an example, it is not limited to this. The partition walls 36 and 37 may be formed, for example, at 36 locations at 10° intervals or 12 locations at 30° intervals.

In addition, in the embodiment, although the width dimension W1 of the vertical portions 36b and 37b of the partition walls 36 and 37 is formed by approximately half (including half) of the width W2 of the liquid 38 as an example for description, it is not This limit; In addition, the width W2 of the liquid 38 is the liquid that is attached to the outer peripheral wall surface of the annular chamber 33, 34 due to centrifugal force when the washing and dehydration tank 4 is rotated stably under no load 38 width W2. For example, the width dimension W1=(W2)/3, or W1=(2×W2)/3.

In the embodiment, although the inclined portions 36c and 37c of the partition walls 36 and 37 are provided so as to extend from the lower ends 36b1 and 37b1 of the vertical portions 36b and 37b to the predetermined heights H3 and H4, the description is not This limit; and the predetermined height H3, H4 is the predetermined height H3, H4 from the inner bottom 33a, 34a of the annular chamber 33, 34. That is, if the inclination of the inclined portions 36c, 37c and the inclination of the liquid 38 at the second resonance of the washing and dehydrating tank 4 If the degree is the same, the inclined portions 36c, 37c may not be provided to the predetermined heights H3, H4 from the inner bottoms 33a, 34a of the annular chambers 33, 34, but may be provided, for example, to the inner bottoms 33a, 34a.

In addition, in the embodiment, although the cross-cut portions 36a, 37a, the vertical portions 36b, 37b, the inclined portions 36c, 37c, and the cross-cut portions 36d, 37d constitute an example of the partition walls 36, 37, it is not This limit. As long as the partition walls 36 and 37 are provided with the inclined portions 36c and 37c, the cross-cut portions 36a and 37a or the vertical portions 36b and 37b, the cross-cut portions 36d and 37d, etc., are not particularly provided. At this time, the ring body 30 of the balance device 7 is preferably made of a size, material, etc. that have sufficient mechanical strength against the centrifugal force generated by the rotation of the washing and dehydrating tank 4.

In addition, in the embodiment, although the configuration in which the balancing device 7 is formed with two layers of annular chambers 33 and 34 in the radial direction is used as an example, it is not limited to this. For example, the annular chamber may be composed of one layer or three or more layers. In this way, in the case of a one-layer structure, the vibration suppression effect of the balance device is reduced compared with a two-layer structure, but a sufficient vibration suppression effect can be obtained in a washing machine with a narrow space. On the other hand, with three or more layers, the vibration suppression effect of the balance device can be further improved.

In addition, the above-mentioned embodiment is for exemplifying the technology of the present disclosure, so various changes, substitutions, additions, omissions, etc. can be made within the scope of the patent application or its equivalent scope.

As explained above, the washing machine of the present invention includes: a washing machine body, a water tank supported in the body of the washing machine vibration-proof, a washing and dehydrating tank rotatably enclosed in the water tank, and a rotary drive washing and dehydrating tank A tank motor, a control unit that controls the motor and controls a series of steps such as washing, rinsing, and dehydration one by one, and a closed annular balance device arranged on the peripheral edge of the upper part of the washing and dehydration tank. The balance device has a ring-shaped chamber in which a liquid is enclosed. The ring-shaped chamber has a plurality of partition walls inside, and the partition walls have at least an inclined portion that slopes downward from the outer circumferential side of the ring to the inner circumferential side of the ring. In addition, the inclination angle of the inclined portion from the horizontal plane is set to be substantially the same as the inclination angle of the liquid from the horizontal plane, and the inclination angle of the liquid from the horizontal plane is near the secondary resonance point of the rotation speed of the washing and dehydration tank The inclination angle from the horizontal when the liquid is inclined toward the annular outer peripheral wall surface due to centrifugal force. With this, especially when the rotation speed of the washing and dehydrating tank is near the secondary resonance point of 200 to 300 r/min, for example, an excellent vibration suppression effect can be exerted.

In addition, in the washing machine of the present invention, the partition wall may further include a vertical portion that is connected to the inclined portion and extends substantially longitudinally. This suppresses the movement of the liquid in the annular chamber in a state where there is no imbalance. As a result, it is possible to suppress the instability of the washing and dewatering tank that occurs when the liquid is not constantly moving.

In addition, in the washing machine of the present invention, the radial width of the vertical portion can also be set to be substantially 1/2 of the radial width of the liquid. The radial width of the liquid can rotate stably without load in the washing and dehydration tank. At this time, the radial width of the liquid when the liquid adheres to the outer circumference of the annular chamber due to centrifugal force. Thereby, when the washing and dehydrating tank rotates stably, the movement of the liquid in an unbalanced state can be made possible. Furthermore, it is possible to restrict liquid movement in a state where there is no large imbalance.

Furthermore, in the washing machine of the present invention, the partition wall may be further provided with a transverse section connected to the vertical section and extending from the outer peripheral side to the inner peripheral side of the annular chamber. Thereby, the strength against the centrifugal force, which is the centrifugal force acting on the annular body of the balance device, can be improved.

In addition, in the washing machine of the present invention, the balancing device may be provided with multiple annular chambers in the radial direction. Thereby, liquid can be enclosed in the multi-layer annular chamber. Therefore, the vibration suppression effect of the washing machine can be further improved.

7‧‧‧Balance device

20‧‧‧Inner wall

21, 22‧‧‧Ministry of Space

23‧‧‧peripheral wall

30‧‧‧Annular body

31‧‧‧Upper ring box

32‧‧‧Lower ring box

33、34‧‧‧Circular Room

35‧‧‧Partition wall

36, 37‧‧‧Next door

36a, 37a, 36d, 37d‧‧‧Cross section

36b, 37b‧‧‧Vertical section

36c, 37c‧‧‧inclined part

38‧‧‧Liquid

H1‧‧‧Water level, distance

H2‧‧‧Internal dimension height

Claims (5)

A washing machine comprising: a washing machine body; a water tank supported in the inside of the washing machine body by shock-proofing; a washing and dehydrating tank rotatably enclosed in the washing tank; a motor for rotating the washing and dehydrating tank; controlling the motor and A control unit that controls a series of steps such as washing, rinsing, and dehydration one by one; and a balancing device arranged on the upper periphery of the washing and dehydrating tank, the balancing device having an annular chamber in which liquid is sealed, and the annular chamber is inside It has a plurality of partition walls, the partition wall has at least an inclined portion inclined downward from the outer circumferential side of the annular to the inner circumferential side of the annular, and the inclination angle of the inclined portion from the horizontal is set to be calculated from the horizontal with the liquid The inclination angle is substantially the same. The inclination angle of the liquid from the horizontal plane is the inclination when the liquid is inclined toward the annular outer peripheral wall surface due to centrifugal force at the rotation speed near the secondary resonance point of the washing and dehydration tank angle. The washing machine according to claim 1, wherein the partition wall further includes a vertical portion connected to the inclined portion and extending substantially longitudinally. Such as the washing machine of claim 2, wherein the radial width of the vertical portion is set to be substantially 1/2 of the radial width of the liquid, and the radial width of the liquid is stable rotation without load in the washing and dehydrating tank When the liquid is attached to the outside of the annular chamber due to centrifugal force The radial width when surrounding the side wall. The washing machine of claim 2 or 3, wherein the partition wall is further provided with a transverse section connected to the vertical portion and extending from the outer peripheral side wall of the annular chamber to the inner peripheral side wall. The washing machine according to claim 1, wherein the aforementioned balancing device is provided with multiple annular chambers in the radial direction.

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