JP2679323B2 - Automatic washing machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic washing machine in which dehydration tub is prevented from abnormal vibration due to unbalanced distribution of a substance to be dehydrated.

2. Description of the Related Art Conventionally, this type of automatic washing machine has a structure as shown in FIG. In FIG. 4, reference numeral 1 denotes an outer frame in which an outer tub 2 is elastically supported by a suspension rod 3 and a dehydrating tub 4 for dehydration is rotatably provided in the outer tub 2. It is provided with a stirring blade 5 inside. 6 is a dehydration tank 4 and a stirring blade 5 via a power transmission mechanism 7.
A motor for selectively transmitting the rotational force to the tank, 8 is a dehydration tank 4
An upper fluid balancer provided in the upper opening of the liquid storage unit 8a is configured by enclosing a liquid 8b in a liquid storage unit 8a made of a hollow annular body fixed along the inner circumference of the upper end of the dehydration tank 4. .
Reference numeral 9 denotes a lower fluid balancer provided in the lower portion of the dehydration tank 4, which is configured by enclosing the liquid 9b in the liquid storage portion 9a.
The action points of the lower fluid balancer 9 are the outer tank 2, the dehydration tank 4,
The center of gravity G of the suspending portion composed of the stirring blade 5, the motor 6, and the power transmission mechanism 7 is matched.

With the above-described configuration, it is possible to easily bring the sum of moments around the center of gravity of the hanging portion or the sum of acting forces close to 0, and reduce vibration due to unbalance during dehydration.

However, in such a structure, the shape of the lower fluid balancer is smaller than that of the upper fluid balancer, and the vibration at the time of centrifugal dehydration startup is increased due to the influence of the upper fluid balancer, and the vibration is reduced. Since the friction damper is used to reduce the size, vibration during steady rotation is easily transmitted to the main body, and there is a problem that vibration noise and sliding noise are large. Further, since the shape of the lower fluid balancer is small and the balance effect is small, there is a problem that it is impossible to cope with an excessive unbalanced load.

The present invention has solved the above-mentioned problems, and a first object thereof is to increase the inertial force in the vicinity of the center of gravity of the hanging portion to reduce the vibration at the time of dehydration start-up and to achieve smooth steady rotation. I am trying. The second purpose is to enhance the balance effect of the lower fluid balancer and to cope with an excessive unbalanced load. A third object of the present invention is to provide an automatic washing machine in which the outer tub is supported only by the elastic member and the friction damper, which is necessary at the time of starting the spin-drying, is one of the causes of noise on the contrary in the normal rotation.

Means for Solving the Problems In order to achieve the above-mentioned first object, the present invention provides a fluid balancer comprising hollow closed pipe lines at the upper and lower portions of a dehydration tank located in an outer bowl that is elastically suspended and supported. Is provided to make the specific gravity of the fluid enclosed in the lower fluid balancer located closer to the center of gravity of the suspension portion higher than that of the upper fluid balancer, and to make the inertial force near the center of gravity of the suspension portion stronger.

In order to achieve the second object of the present invention, the lower fluid balancer is constructed in a hollow closed pipe line which is concentrically multiplexed.
A high specific gravity fluid in which inorganic particles are uniformly dispersed in a solvent using a dispersant is enclosed therein.

In order to achieve the third object, the present invention supports the outer tank from the outer frame only by the elastic member.

Action The automatic washing machine of the present invention, by providing a difference in the specific gravity of the fluid as described above, the inertial force in the vicinity of the center of gravity of the hanging part becomes strong, the vibration at the time of dewatering start becomes small, and it becomes a smooth steady rotation. It can be transferred. In addition, the lower fluid balancer is composed of concentric multiple hollow closed pipes, and the high specific gravity fluid is enclosed inside, so the balance effect of the lower fluid balancer is increased and a large unbalanced load is likely to occur in the lower part of the dehydration tank. It is possible to deal with it sufficiently. Further, since the outer tub is supported from the outer frame only by the elastic member, the vibration is less likely to be transmitted to the main body of the washing machine or the like during the steady rotation, so that the vibration and the noise can be reduced.

First Embodiment A first embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, a power transmission mechanism 11 is fixed to the bottom of the outer tub 10 for receiving water during dehydration, and the power transmission mechanism 11 is connected to a motor 12 fixed to the bottom of the outer tub 10 by a belt. Has been done. A stirring blade 13 is fixed to an inner shaft of the power transmission mechanism 11, and a dehydration tank 14 is fixed to an outer shaft of the power transmission mechanism 11 and is located in the outer tank 10. An upper fluid balancer 15 is provided above the dehydration tank 14, and the upper fluid balancer 15
Is a hollow closed pipe 15a. A lower fluid balancer 16 is fixed to the lower portion of the dehydration tank 4, and the lower fluid balancer 16 is formed of a hollow closed pipe line 16a. Inside the upper fluid balancer 15, salt water is enclosed as the upper fluid 17. Inside the lower fluid balancer 16, water containing salt and the like as a solvent is used as a solvent for the lower fluid 18 as a solvent, and iron oxide, which is used as a material for magnets and the like as inorganic particles, is used as a surface active agent. A high specific gravity fluid uniformly dispersed by using a chemical is enclosed. The outer tub 10 is elastically suspended and supported from the upper end of an outer frame 19 via a suspension 20.

Next, the second and third embodiments will be described. FIG. 2,
In Fig. 3, the lower fluid balancer 21 is composed of double hollow closed pipes 21a and 21b, in which water containing salt etc. for preventing freezing is used as a solvent and magnets are used as inorganic particles. High specific gravity fluid in which iron oxide used as a material is uniformly dispersed by using a surfactant as a dispersant.
22 is enclosed. Inside the hollow closed pipes 15a of the upper fluid balancer 15 and the hollow closed pipes 21a, 21b of the lower fluid balancer 21, partition plates 23 of approximately half the cross section of the hollow closed pipes are provided at several locations on the inner wall ( FIG. 3A-B).

The suspension 20 includes a suspension rod 24 and a spiral spring 25.
And a spring supporting disk 26. That is, the friction damper is eliminated and the outer tank 10 is supported only by the elastic member.
The other structure is similar to that of FIG.

With the above configuration, the high specific gravity fluid 22
Since the lower fluid balancer 16 is heavier than the upper fluid balancer 15, the inertial force near the center of gravity of the hanging part is stronger, the vibration at the time of dehydration start is reduced, and it smoothly shifts to steady rotation. it can. Further, since the lower fluid balancer is composed of double hollow closed pipes and the high specific gravity fluid is enclosed inside, the effect of the balancer is increased, and it is possible to cope with a large unbalanced load that is likely to occur in the lower part of the dehydration tank.

In addition, vibration at the start of dehydration has been reduced,
Can be elastically supported only by the spiral spring 25 from the outer frame 19, and the friction damper of the suspension 20 can be eliminated. When starting the dehydration tank, the high specific gravity fluid 22 moves to the unbalanced load side along the inner wall of the hollow closed pipe,
Although trying to adversely affect the vibration of the dehydration tank 14, a partition plate 23 is provided on the inner wall to prevent the high specific gravity fluid 22 from moving. At steady rotation, due to centrifugal force, the high-density fluid 22 moves along the outer wall of the hollow closed pipe to the opposite side of the unbalanced load, and tries to cancel the unbalanced load, but Since there is no partition plate 23 on the outer side, the high specific gravity fluid 22 moves smoothly and the reaction of the fluid balancer becomes faster.

EFFECTS OF THE INVENTION As described above, the present invention provides a fluid balancer in the upper and lower portions of the dehydration tank, makes the specific gravity of the fluid sealed in the lower fluid balancer heavier than that in the upper fluid balancer, and makes it close to the center of gravity of the hanging portion. By increasing the inertial force, it is possible to reduce the vibration at the time of starting dehydration, and it is possible to smoothly shift to steady rotation. By constructing the lower fluid balancer installed in the lower part of the dehydration tank with concentric multiple hollow closed pipes, and enclosing a high specific gravity fluid in which inorganic particles are uniformly dispersed in a solvent using a dispersant The effect of correcting the unbalance by the fluid balancer is enhanced, and it is possible to cope with a large unbalance load that is likely to occur in the lower part of the dehydration tank. Furthermore, with the above configuration, the unbalance at startup can be corrected by the weight of the fluid balancer, so the friction damper of the suspension can be eliminated,
By supporting the outer tank from the outer frame only by the elastic member, vibration and noise during steady rotation can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an automatic washing machine showing an embodiment of the present invention,
FIG. 2 is a sectional view of an automatic washing machine showing another embodiment of the present invention, FIG. 3 (A) is a sectional view of the dehydration tank, and FIG. 3 (B) is a sectional view of the upper fluid balancer. (C) is a sectional view of the lower fluid balancer, and FIG. 4 is a sectional view of a conventional automatic washing machine. 10 …… Outer tank, 14 …… Dehydration tank, 15 …… Upper fluid balancer, 16, 21 …… Lower fluid balancer, 17 …… Upper fluid,
18 …… Lower fluid, 19 …… Outer frame, 15a, 16a, 21a, 21b …… Hollow closed pipe, 20 …… Suspension, 22 …… High specific gravity fluid.

Claims (3)

(57) [Claims] 1. A fluid balancer consisting of hollow closed pipe lines is provided in the upper and lower portions of a dehydration tank which is elastically suspended and supported, and which is located in the outer container so that An automatic washing machine in which the specific gravity of the fluid enclosed in the lower fluid balancer located near the center of gravity is increased. 2. A lower fluid balancer is concentrically multiplexed,
The automatic washing machine according to claim 1, wherein a high specific gravity fluid in which inorganic particles are uniformly dispersed in a solvent using a dispersant is enclosed in the hollow closed pipe. 3. The automatic washing machine according to claim 1, wherein the outer tub is supported from the outer frame of the outer tub only by the elastic member.