KR19980060338A - Drum Washing Machine - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum washing machine, and more particularly, to a drum washing machine for improving the performance of a washing machine by changing the structure of a drum for washing while rotating about a shaft.

In the present invention, a plurality of washing protrusions are formed on the inner surface of the drum for washing while rotating about a horizontal axis to enable washing of the scrubbing method.

Description

Drum Washing Machine

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drum washing machine, and more particularly, to a drum washing machine for improving the performance of a washing machine by changing the structure of a drum for washing while rotating about a horizontal axis.

As shown in FIG. 1, a conventional drum washing machine includes an outer tub 4 supported by an upper spring 2, a lower damper 3 in an outer casing 1, and an inner side of the outer tub 4, as shown in FIG. A drum (5) installed in the washing machine by rotational force, a motor (6) for driving the drum (5), and a belt (8) for reducing the power of the motor (6) and transmitting it to the drive shaft (7). ), A motor pulley (9) connecting the motor (6) and the belt (8), a pulley (10) connecting the belt (8) and the drive shaft (7), the drive shaft (7) and a drum ( A hub 11 connecting the 5), a heater 12 formed at the bottom of the drum 5 to heat the wash water to enable washing, and a front surface of the drum 5 to match the weight of the driving unit at the rear side. It consists of a counter weight 13 attached to the upper weight 14 for reducing the amplitude of the entire outer tank 4 when dewatering, and a glass door 16 installed on the front of the laundry inlet 15 of the drum (5) It was.

In addition, three large washing blades 17 and a plurality of drain holes 18 serving as discharge holes of the washing water are provided on the inner surface of the drum 5.

Reference numeral 19 is laundry.

The conventional drum washing machine configured as described above is filled with washing water to a predetermined level in the outer tub 4, and when the power is applied, the motor 6 rotates, and the rotational force of the motor 6 is the belt 8 and the pulley 9. The drum 5 connected to the drive shaft 7 is transmitted to the drive shaft 7 through 10 and rotates.

In this case, as shown in FIG. 2, when the three large washing blades 17 formed on the drum 5 pull the laundry 19 out of the water according to the rotation of the drum 5, the washing blades 17 are at a predetermined angle. The laundry 19 is freely dropped onto the laundry / washing liquid by gravity, and in this way, the mechanical force is transmitted to the laundry 19 to perform the washing.

After washing, rinsing is performed in the same manner, and after rinsing, the drum 5 is rotated at a high speed in one direction to perform dehydration.

However, the conventional washing method of the drum washing machine is a method of transmitting mechanical force to a laundry system composed of laundry / tax liquid using free fall, so when the drum's rotation speed is over a certain size, the laundry adheres to the inner wall of the drum and rotates like a drum. Therefore, there is a problem that the free fall does not occur so that the mechanical force is limited.

The relationship between drum radius, gravity acceleration and torque is shown below.

(r: Drum radius, g: Gravitational acceleration, T ₀ : Torque acting to lift laundry at maximum load, ω: Angular velocity, T: Torque, P: Mechanical force)

In the case of a drum about 500mm in diameter, the drum's rotation speed is almost 60rpm, so the mechanical force transmitted to the washing machine is reduced to the conventional pulsator washing machine when the load torque of the drum is about 150kgf-cm. Less than half.

In the case of the pulsator washing machine, the rotation speed of the pulsator is 100 rpm or more, and the load torque of the pulsator is 200 Kgf-cm or more, so that the mechanical force transmitted to the washing machine is more than twice that of the drum washing machine.

In order to solve this problem, the washing performance is heated by washing the heater to increase the washing power, or the washing time is set to a similar level by several times longer than other washing machines (pulsator type or agitator type). This is a long washing time, water consumption is small, but the boiling function to increase the washing power, there was a problem that the electricity consumption increases.

Therefore, in view of this point, the present invention forms a plurality of washing protrusions on the inner surface of the drum for washing while rotating about the horizontal axis, thereby changing the washing method from free-falling to scrubbing. The purpose is to improve cleaning power while maintaining the amount used.

1 is a longitudinal sectional view of a conventional drum washing machine.

2 is an operation diagram showing a washing method of a conventional drum washing machine.

Figure 3 is an operation diagram showing the washing method of the drum washing machine of the present invention.

Figure 4 is a comparison of the rotation angle of the drum of the drum washing machine of the present invention.

5 is another embodiment of the present invention.

(A) is an operation diagram in the forward rotation.

(B) shows the operation in reverse rotation.

Explanation of symbols for the main parts of the drawings

101,201: drum 102,202: washing protrusion

103: laundry 203: hinge

204: movable wing 205: fixed wing

206: spring

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Figure 3 shows the drum configuration of the drum washing machine according to the present invention, a plurality of washings integrally with the drum 101 so as to be able to rub on the inner shaft surface of the drum 101 for washing while rotating around the horizontal axis The protrusion 102 is formed.

And the material of the drum is made of steel, such as stainless steel, the height of the washing projection 102 is composed of about 5 to 15mm.

Reference numeral 103 is laundry.

According to another embodiment of the present invention, as shown in FIG. 5, a plurality of washing protrusions 202 are integrally formed with the drum 201 on an inner side surface of the drum 201 for washing while rotating about a horizontal axis. Between the 202, a movable blade 204 for flowing the hinge 203 axially is provided, the fixed blade 205 is provided in contact with the movable blade 204, the restoring force to the movable blade 204 The providing spring 206 is inserted under the movable blade 204.

Referring to the operation of the present invention configured as described above is as follows.

First, the drum 101 is rotated about a horizontal axis by rotating a motor (not shown in the drawing) that rotates left and right while washing the drum 101 and rotates at a high speed in one direction when dehydrating the drum 101. The washing of the laundry 103 is performed as the rotation of 11 is performed. Since the laundry protrusion 102 is formed low on the drum 101, the laundry 103 is not pulled out of the water, and the laundry 103 and the drum 101 are rotated. Relative movement occurs at) so that washing between the laundry 103 and the washing protrusion 102 is possible.

At this time, the relative motion between the drum 101 and the laundry 103 is smaller than the rotation angle a of the laundry 103 as compared with the rotation angle a of the drum 101, but the rotation of the drum 101 is small. By agitating the drum 101 so that the angle (a) and about 180 ° difference can be maximized the washing effect. That is, the phase difference between the drum 101 and the laundry 103 can be maintained at about 180 ° by adjusting the stirring cycle according to the amount of the laundry 103.

As a result, the mechanical force limitation of the conventional drum washing machine is improved, and the rpm and load torque of the drum 101 act to the same extent as the conventional pulsator or agitator type washing machine, so that the mechanical force transmitted to the washing machine is transmitted to the pulsator type or agitator. You will be able to take it up to the diet level (more than twice the drum type).

That is, the washing time is reduced while maintaining the low water consumption and tangling effect, which is an advantage of the conventional drum washing machine, and the washing performance can be exerted without washing the heater using a heater, thereby saving electric energy.

According to another embodiment of the present invention, when the drum 201 rotates in the forward direction as shown in FIG. 5A, the force acting on the inclined surface of the movable blade 204 by the laundry 103 is spring 206. It becomes larger than the force and the movable blade 204 is lowered to have the same effect as the present invention, when the drum 201 is rotated in the reverse direction as shown in (b) the height of the movable blade 204 is high Since it is maintained as it is to deliver the mechanical force to the laundry in a free-falling manner like the conventional drum washing machine to perform the washing.

Therefore, in a specific direction, the laundry is repeatedly rotated / stopped and the laundry requiring fast and high cleaning power is washed with a scrubbing laundry method, and in the opposite direction, delicate washing is possible with a free-fall method, which is a conventional drum washing machine.

As described above, the present invention forms a plurality of washing protrusions on the inner surface of the drum to change the washing method to washable method, while the washing power is improved while maintaining the low water consumption and tangling effect, which is an advantage of the conventional drum washing machine. Washing time is reduced, washing life using a heater can exhibit the washing performance without washing, not only saves electricity, but also reduces the number of rinsing cycles by improving washing power, thereby saving water.

Claims (5)

In a drum washing machine comprising an outer tub supported by an outer casing, a drum rotatably inserted around a horizontal axis inside the outer tub, left and right stirring when washing the drum, and a motor rotating at a high speed in one direction when dehydrating the drum. Drum washing machine, characterized in that a plurality of washing projections are formed on the inner surface of the drum to enable washing of the scrubbing method. The drum washing machine according to claim 1, wherein the drum is made of iron such as stainless steel, and the washing protrusion is formed integrally with the drum. The drum washing machine according to claim 1, wherein the washing protrusion has a height of 5 to 15 mm so as to generate a smooth relative motion between the laundry and the drum while reducing the load torque applied to the motor during washing. In a drum washing machine comprising an outer tub supported by an outer casing, a drum rotatably inserted about a horizontal axis inside the outer tub, and a motor for rotating the drum, the inner surface of the drum includes a plurality of drums integrally with the drum. Washing protrusions are formed, the movable blades are installed in the hinge flows between the washing projections, the drum washing machine, characterized in that the fixed blades are installed in contact with the movable wings. The drum washing machine according to claim 4, wherein the movable blade has an elastic member connected to the hinge to flow in the shaft.