JP3106511B2 - Drum type washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum type washing machine in which washing and rinsing is performed by rolling a garment inside by rotation of a drum type, and dewatering is performed by centrifugal force generated by high speed rotation of the drum.

[0002]

2. Description of the Related Art A conventional drum type washing machine is shown in FIGS.
The configuration was as shown in FIG. That is, a water tub 53 supported by a suspension 52 is provided in the washing machine main body 51, a front surface is opened in the water tub 53, a rotation shaft 54 is provided on a rear surface, and a plurality of water holes 55 and a rotation shaft 54 are provided on a side surface.
A drum 57 provided with a baffle 56 is provided in parallel with the direction. Further, the water tank 53 is made up of the main body 5 by two dampers 64.
1 and lower supported. The rotating shaft 54 is supported by a bearing unit 58 provided on the rear surface of the water tank 53. A pulley 59 linked with a motor 61 and a belt 60 is attached to the end of the rotating shaft 54. Aquarium 5
A bellows 62 for maintaining watertightness is provided between the front surface 3 and the main body 51, and is fitted with a tapered lid 63.

[0003]

In the structure of such a conventional drum-type washing machine, when the washing and rinsing are to be performed and dehydration is to be performed, the drum is rotated at a high speed while the clothes are biased to the lower portion of the drum 57. Let it. At this time, the drum 57 vibrates greatly due to the eccentric load due to the clothing. In order to suppress this vibration, the damper 64 must have a very strong capacity, and the weight 65 must be attached to the water tank 53. As a result, the weight of the main body became so heavy that it could not be carried by itself, and it was necessary to reinforce the floor firmly in order to install it on a wooden floor in an ordinary Japanese household.

In order to suppress the vibration of the drum 57,
It is easily conceivable to use a fluid balancer that uses a fully automatic washing machine having a rotating shaft on the bottom surface, which is currently widely used in Japan, for this drum type washing machine. However, unlike the fully automatic washing machine, the drum type washing machine has the rotating shaft 54 on the side surface, and the fluid balancer enters the washing water at the time of washing and washing, and the volume of the washing section is reduced. Therefore,
There is a limitation in setting the fluid balancer longer in the direction of the rotation axis in order to improve the correction force during dehydration.

[0005] Further, there is a problem that the drum 57 swings largely near the resonance frequency at the start of dehydration.

Therefore, the present invention solves the above-mentioned problems, and removes a vibration-preventing weight to reduce the weight of the main body, reduce the spin-drying vibration during the spin-drying stroke, and simultaneously reduce the drum volume during the washing stroke. An object of the present invention is to minimize the decrease, maintain the cleaning performance, reduce the weight of the main body, reduce the dehydration vibration during the dehydration process, and prevent the drum from whirling at the resonance frequency at the start of dehydration.

[0007]

In order to achieve the above object, a drum type washing machine according to the present invention has a washing machine body, a suspension or a damper in the washing machine body, and a bearing provided on a side surface. A water tank, a drum having a rotation shaft on a side surface, and rotating around the rotation shaft, a pulley attached to the rotation shaft and arranged outside the water tank, and driving the drum via the pulley and the belt A plurality of radially separated fluid balancers are provided on the peripheral edge of the end of the drum in the central axis direction, and communication holes having different areas are provided on the outer peripheral side in the fluid balancer. In this configuration, a partition plate is formed so that the flow resistance of the fluid inside the partition plate is different.

[0008]

According to the drum-type washing machine of the present invention, the drum vibrates due to the eccentric load caused by the clothes due to the above-mentioned structure. It tends to gather in the opposite direction to the eccentric load, and tries to balance the drum by itself. That is, the fluid in each fluid balancer is collected at a position 180 degrees out of phase with the centrifugal force by the clothing, and a corrective centrifugal force acts to offset the centrifugal force by the clothing. Thereby, large dehydration vibration can be suppressed without occupying a large volume in the drum.

In addition, when the drum is stopped after the washing and rinsing steps and the process proceeds to the dewatering step after draining, the fluid in each of the radially separated fluid balancers accumulates in the lower part due to gravity when draining is completed. ing. When the drum is rotated in this state, the fluid of each fluid balancer rotates while being biased to the same location in the circumferential direction of each fluid balancer due to centrifugal force and gravity during rotation, causing large vibration. Therefore, by making the flow resistance of each of the fluid balancers separated into a plurality of fluids different, it is possible to prevent each fluid from being biased to the same position in the circumferential direction, so that dehydration start The whirling of the drum near the resonance frequency at the time can be suppressed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 are sectional views of the drum type washing machine of the present embodiment.

In FIG. 1, reference numeral 3 denotes a water tank which is suspended semi-constrainedly by a plurality of suspensions 2 on a washing machine main body (hereinafter simply referred to as a main body) 1. A drum 7 having a water hole 5 and a plurality of baffles 6 is provided. A fluid balancer (hereinafter, referred to as a fluid balancer) that is radially separated into two parts at both ends in the center axis direction of the drum 7 and has a partition plate 8 provided therein.
The outside is provided with a first fluid balancer 9 and the inside is provided with a second fluid balancer 10). In addition, a communication hole 11 that communicates each room is provided in the outer peripheral direction of the partition plate 8.

A drum pulley 13 is attached to one end of the rotating shaft 4 via a bearing unit 12 provided in the water tank 3. 14 is a motor pulley 1 attached to the drum pulley 13 and the shaft 16 of the motor 15.
7 is a belt interlocking with 7. The main body 1 is on the front of the water tank 3
And a bellows 18 for maintaining watertightness, and is fitted with a tapered lid 19. 20 is a water tank 3
It is a drainage pump attached to the bottom of the. Reference numeral 21 denotes a friction damper having one end fixed to the bottom of the water tank 3 and the other end fixed to the lower part of the main body 1.

The operation of the above configuration will be described. At the time of washing, washing water is stored in the water tub 3 in advance. The clothes in the drum 7 are rotated by the baffle 6
Is evenly lifted from the lower part of the drum 7 to the upper part,
After that, it falls into the washing water from near the upper part of the drum 7. The clothing is washed by repeating this operation.

Next, the clothes in the drum 7 are biased to the bottom of the drum 7 before the washing and rinsing steps are completed and before the dehydration step is started. When the drum 7 is rotated at a high speed in this state, the drum 7 vibrates due to the eccentric load due to clothing. However, when the resonance frequency of the vibration system is exceeded, the fluid in the fluid balancer generally has a property of collecting in the opposite direction to the eccentric load. Try to balance drum 7 by himself. That is, the fluids in the first fluid balancer 9 and the second fluid balancer 10 are gathered at a position 180 degrees out of phase with the centrifugal force of the garment, and the corrected centrifugal force acts to offset the centrifugal force of the garment, and acts in the direction of the rotation axis 4. About twice the corrected centrifugal force can be obtained without increasing the length of the fluid balancer. Thereby, large dehydration vibration is suppressed.

Further, since it is radially doubled with the first fluid balancer 9 and the second fluid balancer 10, the area occupying the inner surface of the drum 7 is small, so that the width of the baffle 6 is increased during washing and rinsing. Since the volume of the washing water can be increased, the function of the clothes can be improved, the washing performance can be maintained, and the number of water holes 5 provided on the side surface of the drum 7 can be maintained during dehydration. Therefore, the dewatering performance can be maintained.

In this embodiment, an example is shown in which the fluid balancer is divided into two in the radial direction. However, if it is divided into three or more, the length of the fluid balancer in the direction of the rotating shaft 4 can be further reduced. In addition, the corrective centrifugal force of the fluid balancer can be improved, and dehydration vibration can be further suppressed.

FIGS. 3 and 4 are longitudinal sectional views of a drum type washing machine according to another embodiment, and FIGS. 5 and 6 are sectional views of essential parts thereof. The point which is compatible with the above embodiment is that the configuration of the liquid balancer is different.

As shown in FIG. 3 and FIG. 4, the two peripheral edges of the drum 7 in the central axis direction are separated radially into two parts.
An outer first fluid balancer 9a and an inner second fluid balancer 10a are provided. Inside the 1st fluid balancer 9a and the 2nd fluid balancer 10a, the 1st partition plate 24 and the 2nd partition plate 25 which provided the 1st communication hole 22 and the 2nd communication hole 23 which are respectively different in area in the outer peripheral direction are provided. ing. In this embodiment, the area of the first communication hole 22 is set smaller than the area of the second communication hole 23.

The operation in this configuration will be described below. FIG.
As shown in the figure, when the drum 7 is stopped after the washing and rinsing steps and the process proceeds to the dewatering step after draining, when the draining is completed, the clothes 26 in the drum 7 and the first fluid balancer 9a
In addition, the first fluid 27 and the second fluid 28 in the second fluid balancer 10a accumulate in the lower portion due to gravity. The operation up to the resonance frequency when the drum 7 is rotated in the direction of arrow a in this state will be described.

As shown in FIG. 6, the first fluid balancer 9
Since the first fluid 27 in the area a is small in the area of the first communication hole 22 and has high flow resistance, the first fluid 27 remains fixed in the room at the time of stop.
It rotates together with the fluid balancer 9a. However, in the second fluid balancer 10a, since the area of the second communication hole 23 is large and the flow resistance is small, the second fluid 28 flows as shown by the arrow b and rotates with a delay from the second fluid balancer 10a. As a result, the first fluid 27 and the second fluid 28 inside the first fluid balancer 9a and the second fluid balancer 10a are located at different positions in the circumferential direction near the resonance frequency, so that dehydration due to the eccentricity of the fluid inside the fluid balancer. The whirling of the drum 7 near the resonance frequency at the time of starting can be suppressed. After that, when the resonance frequency is exceeded, the first fluid balancer 9a and the first fluid balancer 10a
The fluid 27 and the second fluid 28 pass through the first communication hole 22 and the second communication hole 23 and gather in the opposite direction to the eccentric load, respectively, and try to balance the drum 7 by itself. Thereby, large dehydration vibration is suppressed.

In the above embodiment, the radial direction
Although an example in which the flow resistance is divided into three is shown, the same effect can be obtained by making each flow resistance different even in three or more divisions.

[0022]

As is apparent from the above description, the drum-type washing machine of the present invention has a simple structure of the damper and the weight of the water tank because the drum is provided with a plurality of radially separated fluid balancers. To reduce the weight of the body,
Further, it is possible to secure the washing capacity in the drum and to reduce the dehydration vibration while securing the washing performance, rinsing performance and dehydration performance.

Further, since the flow resistances of the plurality of fluid balancers radially separated are different from each other, the fluid balancer formed in the drum works effectively, the whirling at the time of starting can be prevented, and the dehydration vibration can be reduced. It can be planned.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a drum type washing machine according to an embodiment of the present invention.

FIG. 2 is a side sectional view of the drum type washing machine.

FIG. 3 is a front sectional view of a drum type washing machine of another embodiment.

FIG. 4 is a side sectional view of the drum type washing machine.

FIG. 5 is an enlarged front sectional view of a main part of another embodiment.

FIG. 6 is a front sectional view of a main part for explaining a fluid balancer of the main part of the other embodiment.

FIG. 7 is a front sectional view of a conventional drum type washing machine.

FIG. 8 is a side sectional view of the drum type washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Washing machine main body 2 Suspension 3 Water tank 4 Rotating shaft 7 Drum 9 1st fluid balancer (fluid balancer) 10 2nd fluid balancer (fluid balancer) 12 Bearing unit (bearing) 13 Drum pulley (pulley) 14 Belt 15 Motor 21 Friction damper ( Damper)

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Eiji Matsuda 1006 Kazuma Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-53-51671 (JP, A) JP-A-63- 158336 (JP, A) JP-A-56-14591 (JP, A) JP-A-52-109772 (JP, A) JP-A-63-192990 (JP, U) (58) Fields investigated (Int. ⁷ , DB name) D06F 23/02 D06F 37/00-37/24

Claims (1)

(57) [Claims] 1. A washing machine main body, a water tub supported by a suspension or a damper in the washing machine main body, and provided with a bearing on a side surface, and a drum having a rotation shaft on a side surface and rotating about the rotation shaft. A pulley attached to the rotating shaft and disposed outside the water tank; and a motor for driving a drum via the pulley and the belt. Drum type washing machine in which fluid balancers separated in different directions are provided, and a partition plate in which communication holes having different areas are provided on the outer peripheral side is formed inside the fluid balancer, so that the flow resistance of the fluid in the inside is different. Machine.