KR100360227B1 - Liquid balancer for washing machine - Google Patents

Abstract

The present invention relates to a liquid balancer of a washing machine, comprising a balancer body fixed to the washing and dehydrating tank and having a predetermined volume of fluid chamber therein, made of an elastic member so that its diameter is changed according to the diameter change of the washing and dehydrating tank. By filling the fluid chamber of the balancer body with a certain level of oil to compensate for the unbalance of the washing and dehydrating tank, the balancer does not need to be designed differently according to the capacity difference of the washing and dehydrating tank. It can be installed stably in a washing machine that generates high heat, such as a drum washing machine, thereby reducing the production cost of the washing machine and realizing miniaturization and light weight.

Description

Liquid balancer of washing machine {LIQUID BALANCER FOR WASHING MACHINE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a balancer of a washing machine, and more particularly, to a liquid balancer of a washing machine that can be stably mounted in most washing machines regardless of the type or capacity of the washing machine.

In general, the automatic washing method in which washing and dehydration are processed in a batch is provided with a separate rotary vane in the washing and dehydrating tank so that washing is performed by rotating the laundry and washing water in both directions or in one direction. , An agitator type that is provided with a rotary blade and a laundry punch in the laundry and the dehydration tank so that the laundry is performed by tapping the laundry while rotating the laundry and the washing water. It is divided into a drum type (drum type) to rotate in the direction to perform the washing.

The automatic washing machine performs a dehydration stroke after washing and rinsing stroke. In this dehydration stroke, an unbalanced mass is generated due to the deflection of cloth generated in the washing and dehydrating stroke, and the unbalanced mass has a holding force at the time of dehydration. (加 振 力) acts as a dehydration vibration of the washing machine.

In order to suppress the dehydration vibration of the washing machine, a conventional pulsator type washing machine and an agitator type washing machine are provided with a liquid balancer at the upper part of the washing and dehydrating tank, while the drum type washing machine is called a counter weight. The added mass is attached.

1 is a longitudinal sectional view showing an example of a pulsator type washing machine equipped with a conventional liquid balancer.

As shown in the drawing, the conventional pulsator type washing machine includes an outer case 1 having a predetermined internal volume, an outer tank 2 installed in the outer case 1, and an appropriate amount of washing water is filled, and the outer tank 2 Washing and dehydration tank (3) installed inside the) and the laundry is loaded, and a pulsator (4) rotatably installed on the bottom of the washing and dehydration tank (3) to rotate the wash water and laundry during washing And a driving motor 5 installed at an outer lower portion of the outer tub 2 to generate a driving force, and a driving force of the driving motor 5 to the washing and dehydrating tank 3 and the pulsator 4. Several dampers for connecting the clutch 6 and the outer shell 2 and the outer case 1 to support the outer shell assembly, and suppressing the vibration generated in the outer shell assembly from being transmitted to the outer case 1. (damper) (D) is comprised.

In addition, the above-described liquid balancer 10 is provided at the inner upper end of the washing and dewatering tank 3, which has an outer side wall 11 a and an inner side wall as shown in FIGS. 2A and 2B. Cylindrical annular balancer body 11 in which fluid chamber S is formed of 11b and bottom wall 11c and top wall 11d so that fluid L is filled in the fluid chamber S to have a certain height. ) And a baffle 12 that is shielded at equal intervals inside the balancer body 11 to restrict the flow of the fluid L.

One side surface of the baffle 12 has a horizontal flow hole 12a contacting the inner side wall 11b to allow the fluid to flow in a horizontal state when the washing and dehydration tank 3 is stopped. It is formed to be located below the water surface, the top surface of the baffle 12 has a compensation flow hole (12b) and the outer side wall (11a) so that the fluid flows to the opposite side of the eccentric mass during the rotation of the washing and dehydration tank (3) The top wall 11d is formed at the corner where the upper wall 11d is in contact.

The pulsator type washing machine equipped with the conventional liquid balancer as described above is operated as follows.

That is, when laundry, detergent and washing water are put into the washing and dehydrating tank 3 and then the driving motor 5 is driven, the driving force of the driving motor 5 is driven by the clutch 6 and the washing shaft (unsigned). The pulsator 4 is transmitted to the pulsator 4 and the washing and washing operations are repeated by circulating the laundry and the washing water while repeating the forward and reverse rotation. Thereafter, the driving force of the driving motor 5 is transmitted to the washing and dehydrating tank 3 by the clutch 6 and the dehydrating shaft (unsigned) so that the laundry and the dehydrating tank 3 rotate at a high speed while being washed by centrifugal force. Dehydrated the wash water.

At this time, the laundry in the laundry and dehydration tank (3) is dehydrated in the tangled and twisted state of each other, so in this process the unbalanced mass (M) of the laundry located in the laundry and dehydration tank (3) as described above It causes the vibration noise of the washing machine, but the vibration noise is offset by the liquid balancer 10 provided in the washing and dehydrating tank (3) as shown in FIG. 3 to allow the washing machine to stably perform the dehydrating stroke. do.

For reference, as shown in FIGS. 4A and 4B, in order to compensate for the unbalanced mass in the drum washing machine, a counter mass W of fixed mass is fixedly mounted on the outer surface of the outer tub 21 that does not rotate. It is common to cancel the vibration noise caused by the washing and dehydrating tank (unsigned) which rotates inside the outer tub 21.

Here, the heavier the weight of the counter weight can effectively reduce the vibration noise of the washing machine. 22 is a spring, 23 is a damper, 24 is a motor.

However, the liquid balancer of the conventional washing machine as described above, if the size of the washing and dehydrating tank (3) is changed according to the capacity of the washing machine, the size of the liquid balancer (10) is also redesigned to match the size of the washing and dehydrating tank (3) In particular, in the case of a drum type washing machine, since the washing is performed at a high temperature (drying), the existing liquid balancer 10 may leak the liquid inside the balance due to deformation or cracking due to thermal expansion, thereby effectively canceling the light and unbalanced mass. There was a problem that the liquid balancer can not be mounted in the drum washing machine.

Therefore, the present invention has been made in view of the problems of the liquid balancer of the conventional washing machine as described above, even if the size of the washing and dehydration tank is different, there is no need to redesign the balancer, even if installed in a drum type washing machine SUMMARY OF THE INVENTION An object of the present invention is to provide a variable liquid balancer in which cracking does not occur.

1 is a front sectional view schematically showing an example of a conventional washing machine.

2A and 2B are a perspective view and a plan sectional view showing a liquid balancer of a conventional washing machine.

Figure 3 is a plan sectional view shown to explain the principle of operation of the conventional liquid balancer.

4A and 4B are sectional views showing an example of a balancer of a conventional drum washing machine.

Figure 5 is a plan sectional view showing an example of a washing machine equipped with the liquid balancer of the present invention.

Figure 6 is a plan view showing a liquid balancer of the washing machine according to the present invention.

7 is a plan view showing a modification of the liquid balancer of the present invention.

8 is a schematic view showing the operation of the liquid balancer of the present invention.

9 is a schematic view showing a state of movement of the fluid in the "A" part of FIG.

10 is a front sectional view showing a state in which the liquid balancer of the present invention is applied to a drum washing machine.

** Explanation of symbols for main parts of drawings **

100,100 '; Washing and dehydration tank 200: liquid balancer

210: balancer body 211: wrinkles

220: fluid M: unbalanced mass

S; Fluid chamber

In order to achieve the object of the present invention, it is made of an elastic member so that the diameter is changed in accordance with the change in the diameter of the washing and dehydration tank rotated by receiving the driving force during the washing, and fixed to the washing and dehydration tank and a certain volume therein Provided is a balancer body in which a fluid chamber is formed, and a fluid balancer filled with a fluid surface of the balancer body to have a certain level of oil level to compensate for the unbalance of the washing and dehydrating tank.

Hereinafter, the washing machine liquid balancer of the present invention will be described based on the embodiment shown in the accompanying drawings.

Figure 5 is a plan sectional view showing an example of a washing machine equipped with a liquid balancer of the present invention, Figure 6 is a plan view showing a liquid balancer of the washing machine according to the present invention.

As shown therein, the pulsator type washing machine equipped with the liquid balancer according to the present invention is provided with an outer tub 2 inside the outer case 1, and the washing and dehydrating tank 100 inside the tub 2. ) Is installed, the pulsator (4) is installed on the bottom of the washing and dehydration tank 100, the drive motor (5) is installed below the outer tank (2), one side of the drive motor (5) The clutch 6 is installed, the upper end of the outer case (1) is provided with a damper (D) for supporting the outer assembly, the upper and lower ends of the laundry and the dehydration tank (100), respectively, when washing the laundry The liquid balancer 200 which suppresses the vibration noise of the washing machine according to the unbalanced mass is installed.

The liquid balancer 200 is made in a bellows shape having elasticity so that its diameter is varied according to the diameter change of the washing and dehydrating tank 100 that rotates during washing as shown in FIG. 6 and has a constant volume therein. The balancer body 210 is provided with a fluid chamber (S) and the inside of the balancer body 210 is filled to have a certain level of oil level to compensate for the unbalanced mass (M) of the laundry to wash and dehydration tank (100) It consists of a fluid 220 to cancel the vibration noise.

The wrinkle portion 211 of the balancer body 210 is sufficient if the height (h) is usually about 1/5 to 1/10 of the tube diameter, and filled in the fluid chamber (S) of the balancer body 210 The flow rate of the fluid is usually preferably about 50 to 70% of the volume of the fluid chamber S.

On the other hand, the balancer body 210, although not separately shown in the figure is generally formed in a circular cross section, it may be formed in a rectangular cross section or other cross-sectional shape. In addition, the balancer body 210 may be formed in a single tube in a batch and fixed at a washing and dewatering tank, and then both ends thereof may be combined, but may be connected to each other by making several tubes as shown in FIG. 7. .

In the drawings, the same reference numerals are given to the same parts as in the prior art.

In the drawings, reference numeral 110 denotes a balancer support, 310 a balancer body of a multi-tubular balancer, and 310a and 310b are connections of respective balancer bodies.

The general operation of the washing machine equipped with a liquid balancer according to the present invention as described above is similar to the conventional.

That is, laundry and detergent and washing water are put into the washing and dehydrating tank 100, and then the driving motor 5 is driven to rotate the washing and rinsing stroke or the dehydrating stroke while the pulsator 4 or the washing and dehydrating tank 100 rotates. In this case, the laundry in the laundry and the dehydration tank 100 generates vibration by the unbalanced mass (M), especially in the dehydration stroke, causing vibration noise of the washing machine, but the vibration noise is the washing and dehydration tank (100). Offset by the liquid balancer 200 provided in the) to the washing machine to perform a stable dehydration stroke.

Here, the liquid balancer of the washing machine as shown in Figure 8 during the dehydration administration of the washing and dehydrating tank 100, the rotational speed of the washing and dehydrating tank 100 is higher than the natural frequency of the washing machine and washing and dehydrating tank ( 100 ') is inclined so that the fluid 220 in the fluid chamber S is located on the opposite side of the unbalanced mass M, whereby the fluid 220 is in the opposite direction 200 to the excitation force due to the unbalanced mass. ') Acts as a compensation mass for the unbalanced mass and generates a balancing effect, thereby reducing the vibration noise of the washing machine.

At this time, as shown in Figure 9, the fluid in the fluid chamber (S) is the wrinkles formed on the inner circumferential surface by the centrifugal force caused by the washing and rotation of the dehydration tank 100, the resistance component to the flow of the fluid As a result, the difference (V ₁ -V ₂ ) between the fluid velocity (V ₁ ) near the inner circumferential surface and the fluid velocity (V ₂ ) away from the inner circumferential surface is reduced so that the fluid is rotated in the washing and dewatering tank (100). It accelerates at the time and flows faster than the natural frequency of the washing machine, thereby preventing abnormal noise of the washing machine due to abnormal operation of the fluid.

Thus, when the liquid balancer 200 is made of elastic bellows and the like fixedly installed in the washing and dehydrating tank, even if the diameter of the washing and dehydrating tank 100 is changed according to the capacity difference of the liquid balancer 200 Since only a long length of installation is necessary, the liquid balancer 200 does not need to be designed differently according to the capacity of the washing and dehydrating tank 100.

In addition, when the liquid balancer is installed in the drum type washing machine 300 as shown in FIG. 10, even if the washing and dehydration tank 310 is thermally deformed due to the high temperature of the drum type washing machine 300, the liquid balancer is deformed. As the liquid balancer 320 flexibly corresponds to the liquid balancer 320, the liquid balancer 320 can be stably installed in the drum type washing machine 300, and thus the counter weight that was previously attached to the drum type washing machine is the liquid balancer. It can be replaced by the counterweight, which can eliminate the excessive production cost or increase the washing machine.

As described above, the liquid balancer of the washing machine according to the present invention is made of an elastic member so that its diameter is changed according to the diameter change of the washing and dehydrating tank and is fixed to the washing and dehydrating tank and provided with a constant volume of the fluid chamber therein. The balancer body and the fluid chamber of the balancer body are filled to have a certain level of oil to compensate for the unbalance of the washing and dehydrating tank, so that the balancer does not need to be designed differently according to the capacity difference of the washing and dehydrating tank. The washing machine can be stably installed in a washing machine that generates high heat, such as a drum washing machine, thereby reducing the production cost of the washing machine and realizing miniaturization and light weight.

Claims (2)

In the liquid balancer of the washing machine to fix the balancer body having a fluid volume in the washing and dehydration tank to fill a certain amount of fluid to compensate for the unbalance of the washing and dehydration tank during washing and dehydration, The balancer body is capable of varying the diameter according to the diameter of the washing and dehydrating tank, and also reduces the flow rate by reducing the speed difference between the fluid approaching the inner wall and the fluid away from the inner wall. The liquid balancer of the washing machine characterized by having a tubular bellows shape. The liquid balancer of claim 1, wherein the balancer body is formed by connecting a plurality of tubular bellows to each other and assembling in a closed loop shape.