KR100349710B1 - apparatus for preventing sympathetic vibration for dehydration basket of separate-type washing machine - Google Patents

Abstract

According to the vibration preventing device of the dehydration tank of the two-chamber washing machine according to the present invention, the air flow to rotate in the space between the tub 31 and the dehydration container 33 during the high-speed rotation of the dehydration container 33 is the tub ( 31 is impeded by the air blocking means 71 which protrudes toward the dehydration container 33 from the inner surface. Therefore, the resonance caused by the flow of air is prevented and thus the excitation of the dehydration tank 30 is also prevented, thereby increasing the durability of the dehydration tank 30 and protecting the mechanical parts around the dehydration tank 30. It can work.

Description

Apparatus for preventing sympathetic vibration for dehydration basket of separate-type washing machine}

The present invention relates to a two-chamber washing machine, and more particularly, to a vibration preventing device of the dehydration tank of the two-chamber washing machine that can prevent the excitation of the dehydration tank of the two-chamber washing machine.

In general, a conventional two-stage washing machine, as shown in Figure 1, the washing tank 3 and the dehydration tank (5) is separated from each other, the washing machine main body 1 and the pulse installed inside the washing tank (3) The eater 7 is provided. At this time, the pulsator 7 is rotatably installed by being connected to the washing motor 9 and the washing motor 9 via the power transmission means.

The dehydration tank 5 is composed of a tub 11 fixed to one side of the washing machine body 1, and a dehydration tank 13 rotatably coupled to the inside of the tub 11. A plurality of drainage holes 15 are formed on the wall surface of the dehydration tube 13, and the dehydration tube 13 is connected to the dehydration motor 19 via the dehydration shaft 17 to be rotatable.

In the conventional two-chamber washing machine configured as described above, when washing, the washing cloth is introduced into the washing tank 3, the washing water is introduced, the appropriate amount of detergent is introduced, and the washing motor 9 is driven to pulse. The washing is performed by rotating the data 7 forward and backward. When the washing is completed, the washing water is repeatedly introduced into the washing tank to perform a rinsing cycle.

The rinsed laundry cloth is put into the dehydration tank 13 of the dehydration tank 5 to drive the dehydration motor 19. Accordingly, as the laundry cloth rotates at high speed together with the dehydration container 13, dehydration is performed by centrifugal force. At this time, the water contained in the laundry cloth contained in the dehydration container 13 moves to the inner circumferential surface of the dehydration container 13 by centrifugal force, and flows out through the drain hole 15 to the outside.

In the dehydration operation, the dehydration motor 19 has a rotational speed of about 1800 rpm when the frequency of the power source is 60 Hz with four poles, and the rotation speed is about 1500 rpm when the frequency of the power source is 50 Hz with four poles. Since the motor 19 is directly connected to the dehydration container, the dehydration container 13 is rotated at about 1500 rpm to about 1800 rpm.

At this time, the air in the space (S) between the dehydration tube 13 and the tub 11 is also rotated at about the same speed as the rotation speed of the dehydration tube (13). The frequency generated by the rotation of air coincides with the natural frequency of the tub 11 vibration system, and the tub 11 has a resonance phenomenon, which causes the dehydration tank 5 Vibration is severe and there is a problem that not only the durability of the dehydration tank 5 itself decreases, but also adversely affects the mechanical parts around the dehydration tank 5.

The present invention is to solve this problem, an object of the present invention is to prevent the vibration of the tub due to the flow of air in the space between the dehydration tank and the tub to prevent the vibration of the dewatering tank of the dewatering tank of the two tank washing machine To provide.

1 is a partial cross-sectional view showing a two-chamber washing machine to which the anti-vibration device of the conventional dehydration tank is applied.

Figure 2 is a partial cross-sectional view showing a two-chamber washing machine to which the excitation prevention device of the dehydration tank according to the present invention is applied,

3 is a cross-sectional view taken along the arrow A-A in FIG.

Figure 4 is a cross-sectional view of the dehydration tank according to another embodiment of the present invention along the arrow A-A line of Figure 2,

Fig. 5 is a longitudinal sectional view showing an excitation prevention device of a dehydration tank according to still another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

3: washing tank 30: dehydration tank

31: Tub 33: Dehydration Can

71: rib

In the dehydration tank of the dehydration tank of the two-chamber washing machine according to the present invention for achieving this object; In the dehydration tank of the two-chamber washing machine rotatably coupled to the inside of the tub, The inner surface of the tub Air blocking means is provided to protrude toward the dehydration tank to prevent the air flow to rotate in the space between the tub and the dehydration container during the high-speed rotation of the dehydration container.

In addition, the air blocking means is characterized in that consisting of a plate-shaped rib protruding in the direction orthogonal to the rotation direction of the dehydration tank in the lower portion of the tub.

In addition, the rib is characterized in that consisting of a triangular shape having two sides of the lower inner surface and the bottom surface of the tub.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to Figure 2, the two-chamber washing machine according to the present invention is installed in the washing machine body 10, the washing tank 3 and the dehydration tank 30 to be separated therein, respectively, and the bottom of the washing machine body 10 A washing motor 9 for driving the washing tank 3 and a dewatering motor 39 for driving the dewatering tank 30 are provided. It is disposed inside one side, the pulsator 7 is coupled to the bottom thereof. The pulsator 7 is rotatably connected to the washing motor 9 via the washing shaft 8 and the power transmission means. And the dehydration tank 30 is inside the other side of the washing machine body 10. It is disposed in the tubular tub 31 is fixed to the inside of the other side of the washing machine main body 10, and the dehydration container 33 rotatably disposed in the tub (31). A plurality of drainage holes 35 are formed on the wall surface of the dehydration container 33, and the dehydration container 33 is directly connected to the dehydration motor 39 via the dehydration shaft 37 to rotate. You exercise.

The washing tank 3 is suspended in the washing machine main body 10 and supported by the washing tank support 41. In addition, the washing shaft 8 is provided with a pulley 43 for transmitting a rotational force to the pulsator (7). The pulley 43 is a rotating shaft of the washing motor 9 by the V-belt 47 so as to be linked to the power of the washing motor 9 mounted on the base 45 supporting the washing machine body 10. It is connected to the pulley 49 mounted on the. In addition, one end of the drain hose 53 is connected to the drain port 51 formed at one side of the bottom surface of the washing tank 3 to discharge the sewage after the washing process is completed, and the other end of the drain hose 53 is the dehydration tank. It is connected to the drain case 55 formed integrally with the (30).

On the other hand, a dehydration tank cover 57 is attached to the outer bottom surface of the dehydration container 33 to fix the dehydration shaft 37, and the dehydration shaft 37 fixed to the dehydration container cover 57 is formed. One side penetrates the bottom surface of the tub 31 and the other side of the dehydration shaft 37 is connected to the drive shaft 59 of the dewatering motor 39 and fixedly coupled by a coupling 61. At the bottom of the dewatering motor 39, a damping spring 63 is disposed to support the dewatering motor 39 while attenuating vibration generated by the high speed rotation of the dewatering container 33. It is fixed to).

On the other hand, the lower surface of the dehydration tank 30 in which the dehydration container 33 is installed, while supporting the dehydration shaft 37 to rotate smoothly, the drain hole 35 formed on the main surface of the dehydration container 33 The bellows 65 is mounted to prevent the water discharged through the leak. In addition, the drain case 55 is disposed on one side of the lower surface of the dehydration tank 30 so that the water discharged from the dehydration tank 33 is drained, and the washing tank 3 is disposed below the drain case 55. ) And the drain hose 67 is connected to drain the water drained from the dehydration tank (30) to the outside of the washing machine body (10).

The upper side of the washing machine body 10 is provided with an operation unit 69 coupled to a switch for operating the washing machine.

In addition, the lower inner surface of the tub 31 is provided with an air blocking means to block the air rotating between the tub 31 and the dehydration tank (33). The air blocking means is a plate-shaped rib 71 attached to protrude toward the dehydration container 33. That is, the plate-shaped rib 71 protrudes in the direction orthogonal to the rotational direction of the dehydration tube 33, thereby preventing the rotation airflow between the tub 31 and the dehydration tube 33.

The rib 71 is a triangular plate having two sides of the lower inner surface and the bottom surface of the tub 31. As shown in Fig. 3, the ribs 71 have an odd number (three in the drawing), and the protrusion length of the ribs 71 is preferably made as large as possible, but the dehydration container 33 is inclined. In the case of shaking, it is preferable to have a sufficient distance from the dehydration container 33 so as not to be damaged by direct contact with the dehydration container 33.

In addition, the rib 71 is preferably molded integrally with the dehydration container 33 by injection molding.

In addition, the said rib 71 may be one piece.

In addition, it is preferable that a shock absorbing member such as a sponge (not shown) is attached to the inside of the upper portion of the tub 31 so as to absorb the shock when the dewatering container 33 is inclined due to abnormal vibration.

Next, the operation of the two-chamber washing machine equipped with the vibration isolation device configured as described above and the effect thereof will be described. First, the washing water is introduced into the washing tank 3, the washing water is introduced, and the appropriate amount of detergent is added. When the switch of the operation unit 69 formed on the upper end of the washing machine main body 10 is operated, power is applied to the washing motor 9 mounted on the base 45 to generate power. In this case, the washing motor Pulley 49 is rotated in accordance with the operation of (9), the rotational force of the pulley 49 is transmitted to the pulley 43 on the pulsator 7 side through the V-belt (47).

As the pulley 43 rotates, the pulsator 7 connected to the washing shaft 8 rotates alternately to form a water flow in the washing tank 3, and the washing stroke is performed after a predetermined time. When this is completed, the washing water is supplied to the washing tank 3 through a water supply port (not shown), and when a predetermined amount or more of the washing water is supplied, a plurality of rinsing cycles are started.

In the rinsing cycle, the washing sewage is opened through a drain hose 53, a drain case 55, and a drain hose 67 formed on the bottom of the washing tank 3 according to the operation of a solenoid valve (not shown). Discharged to the outside of the washing machine body (10).

After a plurality of rinsing cycles are completed, the washing cloth is removed from the washing tank 3 and placed in the dehydrating container 33 of the dehydrating tank 30. Then, the switch of the operation unit 69 disposed on the upper end of the washing machine body 10 is turned off. When operated, power is applied to the dehydration motor 39 mounted on the base 45 to generate power, and the dehydration shaft coupled to the drive shaft 59 of the dewatering motor 39 by the coupling 61. As the 37 is interlocked, the dewatering container 33 fixed to the dewatering shaft 37 rotates at a high speed in the predetermined direction. As a result, the dewatering container 33 is rotated by the centrifugal force generated by the high-speed rotation of the dewatering container 33. The contained water is discharged through the drain hole 35 formed in the entire circumferential surface of the dehydration container 33. The water discharged from the dehydration tank 30 is drained to the outside of the washing machine body 10 through the drain case 55 and the drain hose 67 disposed on the bottom surface of the dehydration tank 30.

While the dehydrator 33 is rotating, the air in the space S between the dehydrator 33 and the tub 31 is also rotated at about the same speed as the number of revolutions of the dehydrator 33. At this time, the flow of air collides with the rib 71, whereby the rotational speed of the air is significantly reduced near the tub 31.

Therefore, the case where the frequency of the air flow coincides with the natural frequency of the vibration system of the tub 31 does not occur, and the tub 31 does not cause resonance, thereby preventing the phenomenon of excitation.

On the other hand, when the weight of the laundry cloth put into the dehydration tank 30 is eccentric, if the laundry container is inclined and hits the tub 31, a shock absorbing member such as a sponge (not shown) is attached to the tub 31 and the like. Protect the dehydrator (33).

In addition, in the embodiment of the present invention, the ribs 71 are described as being attached to only one side of the inner surface of the tub 31 as an example, but not limited thereto, as shown in FIG. 4, the inner surface of the tub 31 '. A plurality of ribs 71 may be attached to both sides. At this time, it is preferable that the number of ribs 71 'which form a group becomes odd (three in the figure). In addition, the ribs 71 ′ may be attached at predetermined intervals over the entire inner circumferential surface of the tub 31.

In addition, as shown in Fig. 5, a rib 71 " may be attached to the side of the tub 31 " at a predetermined height H at the inner bottom surface of the tub 31 ". Even if the dewatering container 33 "is inclined as indicated by the imaginary line, it is preferable to attach the dewatering container 33" to have a size and an attachment position that do not touch the dewatering container 33 ".

The present invention is not limited to the above embodiment, and various modifications can be made. That is, all of the configurations that form protrusions on the inside of the tub so as to block the flow of air in the space between the tub and the dehydration pail fall within the scope of the present invention.

As described in detail above, according to the excitation prevention device of the dehydration tank of the two-chamber washing machine according to the present invention, the air flow to rotate in the space between the tub and the dehydration bucket during the high-speed rotation of the dewatering tub to the dehydration tank on the inner surface of the tub It is impeded by air blocking means configured to protrude toward. Therefore, the resonance caused by the flow of air is prevented and thus the excitation phenomenon of the dehydration tank is also prevented, thereby increasing the durability of the dehydration tank as well as protecting the mechanical parts around the dehydration tank.

Claims (4)

In the dewatering tank of a two-chamber washing machine in which a dehydration container is rotatably coupled to the inside of the tub, An inner surface of the tub is provided with an air blocking means protruding toward the dehydration tank to prevent the air flow to rotate in the space between the tub and the dehydration tank during the high-speed rotation of the dehydration tank of the dehydration tank of the two-type washing machine Excitation prevention device. The method of claim 1, The air blocking means of the dehydration tank of the dehydration tank of the two-chamber washing machine, characterized in that made of a plate-shaped rib projecting in a direction orthogonal to the direction of rotation of the dehydration tank from the lower side of the tub. delete The method of claim 2, The rib is an excitation prevention device of the dehydration tank of the two-chamber washing machine, characterized in that made of a triangular shape having two sides of the bottom inner surface and the bottom surface of the tub.