JPH11179086A - Pulsator assembly for washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulsator assembly for washing machine capable of preventing the entanglement and damage of laundry and improving the washing effect. SOLUTION: When this pulsator assembly 50 is rotated, a rotary stream is generated inside a washing tank 60 by a stirring blade 21. Simultaneously, washing water present in the internal space of the pulsator assembly 50 flows back to the inside of a guide groove 21a, and is led to a jetting hole 25 along the guide groove 21a and is jetted to the upper part of the jetting hole 25. As a result, a stream jetted upwards through the jetting hole 25 is formed together with the rotary stream formed by the stirring blade 21 and a turbulent flow is generated inside the washing tank 6. In the meantime, a blade 37 generates a radial stream by imparting centrifugal force to the washing water by the rotation of the pulsator assembly 50. By the radial stream, the washing water flows into a duct 11 and foreign matters are filtered by a filtering net in the process of flowing out through a flow-out hole at the upper part of the duct 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulsator assembly for a washing machine, and more particularly, to a pulsator assembly for improving a washing effect by generating a water jet which jets upward into a washing tub.

[0002]

2. Description of the Related Art As shown in FIG. 1, a general washing machine for storing laundry and performing washing and dehydrating operations includes an outer tub 2 provided in a casing 1, and a washing machine provided in the outer tub 2. A washing tub 6 for storing articles, a pulsator 8 provided on the bottom of the washing tub 6, a drive motor 3 provided on a lower portion of the outer tub 2,
A clutch assembly for selectively transmitting the power of the drive motor to the pulsator and the washing tub;

A duct 11 is formed on the inner wall surface of the washing tub 6. The duct 11 forms a flow path in the inner wall surface of the washing tub 6 along the vertical direction. An outlet is formed at the upper end of the duct 11, and an inlet is formed at the lower end. The washing water in the washing tub 6 passes through the inlet 1
1 or flows out of the duct 11. At the outlet of the duct 11, a filtration network 13 for filtering foreign substances in the washing water is provided. A large number of through holes 6a are formed in the side surface of the washing tub 6. The outer tub 2 and the washing tub 6 communicate with each other through the large number of through holes 6a.

The pulsator 8 has a disk-shaped main body 8a as shown in FIG. A large number of stirring blades 8b are formed radially at the upper part of the main body 8a, and a large number of blades 8c are formed radially at the lower part. The blade 8c is located near an inlet formed at a lower part of the duct 11. During the washing operation, the power of the drive motor 3 is transmitted to the pulsator 8 through the clutch assembly 5 so that the pulsator 8
Rotates to form a rotating water flow in the washing tub 6. The pulsator 8 is alternately rotated in both directions by the drive motor 3.
The washing operation of the laundry housed in the washing tub 6 is performed by the rotating water flow generated by the pulsator 8. The stirring blade 8b plays a role in assisting the pulsator 8 to generate a rotating water flow.

The washing water flows into the duct 11 by the blade 8c when the pulsator 8 rotates. The washing water flowing into the duct 11 moves upward and flows out through the upper outlet. At the time of the outflow, the foreign matter in the washing water is filtered by a filtration network, and the washing water from which the foreign matter has been filtered is re-supplied into the washing tub 6. In this manner, the laundry is washed by the rotating water flow by the pulsator 8 and the water flow circulating through the duct 11. At the time of the spin-drying operation, the power of the drive motor 3 is transmitted to the washing tub 6 and the pulsator 8 via the clutch assembly 5,
Thereby, the washing tub 6 and the pulsator 8 rotate integrally at a high speed. The dehydration operation is performed by the centrifugal force generated at this time.

However, in such a conventional washing machine, since a simple circular water flow is formed by the pulsator 8, a sufficient washing effect cannot be obtained. Further, there is a problem that the laundry is entangled with each other due to the simple rotating water flow. The entanglement between the laundry has caused a decrease in the washing effect, a residual detergent during the rinsing operation, and damage to the laundry.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems.
An object of the present invention is to provide a pulsator assembly for a washing machine that can prevent entanglement of laundry and damage to the laundry by forming a turbulent flow in a washing tub, and can improve a washing effect.

[0008]

According to the present invention, there is provided a pulsator assembly for a washing machine which is rotated by a drive motor to generate a water flow in a washing tub, and which is installed on a bottom surface of the washing tub. Disc-shaped lower pulsator;
An upper pulsator coupled to an upper portion of the lower pulsator to form a predetermined internal space between the lower pulsator and the lower pulsator, and having an ejection hole formed at a central portion thereof; A number of stirring blades forming a number of guide grooves extending from an edge of the upper pulsator to the ejection hole on a lower surface of the pulsator;
It is characterized by including. Accordingly, when the drive motor is driven, the washing water in the internal space which receives the radial centrifugal force flows back along the guide groove and is ejected upward through the ejection hole.

[0009] The pulsator assembly has at least one inflow hole for inflow of the washing water into the internal space. Preferably, the inflow hole is formed in the lower pulsator. It is desirable that the edge of the inflow hole has an inclined surface. The inclined surface serves as a guide for flowing the washing water into the internal space. A number of blades are formed on the lower surface of the lower pulsator along the radial direction.

[0010] According to the present invention, since the upward jet flow is generated in the washing tub together with the rotating water flow, a turbulent flow is generated in the washing tub. Therefore, the laundry is not entangled or damaged, and the washing effect and the rinsing effect are improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. The same parts as those of the conventional washing machine shown in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted. 3 and 4 show a pulsator assembly according to a first embodiment of the present invention. The pulsator assembly 50 includes a disk-shaped upper pulsator 20 and a lower pulsator 30. The lower pulsator 30 is installed on the bottom of the washing tub 6, and the upper pulsator 20 is connected to the upper part of the lower pulsator 30. By combining the upper pulsator 20 and the lower pulsator 30, a predetermined internal space is formed inside the pulsator assembly 50.

At the center of the upper pulsator 20 is a spout 2
6 is formed to project upward, and a pair of ejection holes 25 are formed in the ejection portion 26. A large number of stirring blades 21 are formed radially on the upper surface of the upper pulsator 20. Stirring blade 2
1 is formed so as to protrude upward from the upper pulsator 20, and forms a guide groove 21 a extending from the edge of the upper pulsator 20 to the ejection hole 25 on the lower surface of the upper pulsator 20.

At the center of the lower pulsator 30, a connecting portion 3 is provided.
5 are provided. The coupling portion 35 is fixed to the pulsator shaft of the clutch assembly 5 by a bolt 61. Spout 2
On the inner surface of 6, another connecting portion 29 corresponding to the connecting portion 35 of the lower pulsator 30 is provided. The connecting part 29 of the upper pulsator 20 and the connecting part 3 of the lower pulsator 30
The upper pulsator 20 and the lower pulsator 30 are fixed relative to each other in the rotational direction by mutual coupling with the pulsator 5. Thereby, the lower pulsator 30 and the upper pulsator 20 rotate integrally when the drive motor 3 operates.

An inflow hole 31 is formed in the lower pulsator 30. The inlet 31 provides a flow path for washing water to flow into the internal space of the pulsator assembly 50. As shown in FIG. 5, the edge of the inflow hole 31 forms an inclined surface 33. This inclined surface 33 is provided with a pulsator assembly 50.
And serves as a guide for flowing the washing water into the pulsator assembly 50 during the rotation of. Lower pulsator 30
A large number of blades 37 are formed on the lower surface of in the radial direction. The blade 37 is located adjacent to an inlet formed in a lower part of the duct 11.

The operation and effect of the pulsator assembly of the present invention having the above configuration will be described below with reference to FIG. When the pulsator assembly 50 rotates, a rotating water flow is generated in the washing tub 6 by the stirring blade 21. At the same time, the washing water contained in the internal space of the pulsator assembly 50 receives a radial force due to centrifugal force. Therefore, the wash water flows radially, and the flow of the wash water flows back into the guide groove 21a as shown in FIG. The backwashed washing water is guided toward the ejection holes 25 along the guide grooves 21a, and is ejected upward through the ejection holes 25. As a result, together with the rotating water flow formed by the stirring blades 21, as shown in FIG.
A water flow that is ejected upward through the tub 6 is formed, and a turbulent flow is generated in the washing tub 6. This turbulence reduces the entanglement of the laundry and improves the washing effect.

On the other hand, the blade 37 applies a centrifugal force to the washing water by the rotation of the pulsator assembly 50 to generate a radial water flow. This radial water flow causes the washing water to flow into the duct 11 as shown in FIG. 6, and the foreign matter is filtered by the filtration network 13 in the process of flowing the washing water through the outlet hole at the top of the duct 11. .

FIG. 7 shows a pulsator assembly according to a second embodiment of the present invention. In the description of this embodiment and other embodiments to be described later, the same parts as those in the first embodiment will be described with the same reference numerals. The configuration of the pulsator assembly 50 of the present embodiment is the same as that of the above-described embodiment except for the inflow hole 31 formed in the lower pulsator 30. That is, the guide groove 21a and the ejection hole 2 as shown in FIG.
5 are formed. The configurations of the guide groove 21a and the ejection holes 25 are the same as those of the first embodiment.

The lower pulsator 30 comprises a ring-shaped frame 30a, a connecting portion 35a connected to the connecting portion 29 of the upper pulsator 20, and a number of blades 37a connecting the frame 30a and the connecting portion 35a. The inflow hole 31a is formed by the blade 37a and the frame 30a.

When the pulsator assembly 50 rotates in the direction opposite to the clock hand, as shown in FIG. 7, the washing water in the washing tub 6 flows relative to the upper and lower sides of the blade 37a. Become. The washing water flowing to the upper side of the blade 37a flows into the internal space of the pulsator assembly 50, and is ejected upward through the ejection holes 25 by the same operation as in the first embodiment. At this time, the washing water is guided by the blade 37a so as to move upward.
The force ejected upward through 5 increases. Further, the blade 37a is connected to the duct 1 in the same manner as in the first embodiment.
1 has a function of flowing washing water. According to the present embodiment, the washing water is spouted more strongly through the spouting holes 25, and the effect of generating the turbulent flow in the washing tub 6 is increased.

FIGS. 8 and 9 show a pulsator assembly according to a third embodiment of the present invention. In the present embodiment, the inflow hole 31b is formed in the upper pulsator 20.
More specifically, a large number of inflow holes 31b are formed on the outer peripheral surface of the upper pulsator 20 at predetermined intervals. Further, a shielding rib 28 is formed on the upper pulsator 20. As mentioned in the description of the operation of the first embodiment, the shielding rib 28 has a function of causing the washing water moving in the radial direction to flow backward due to the centrifugal force. That is, as shown in FIG. 9, when the pulsator assembly 50 rotates, the washing water flowing in the radial direction hits the shielding ribs 28 and the guide grooves 2.
Backflow into 1a. The backwashed washing water flows along the guide groove 21a and is ejected through the ejection holes 25 as described above. The washing water in the washing tub 6 has an inlet 31b.
Through the pulsator assembly 50.

FIG. 10 shows a pulsator assembly according to a fourth embodiment of the present invention. In the present embodiment, the configuration of the upper pulsator 20 is the same as that of the above-described third embodiment,
The configuration of the lower pulsator 30 is the same as that of the above-described second embodiment. That is, the upper pulsator 20 has an inflow hole 31b formed on a side surface and a shielding rib 28, and the lower pulsator 30 includes a frame 30a, a blade 37a,
5a. According to the present embodiment, the washing water flows into the pulsator assembly 50 through the inlet 31 a formed in the upper pulsator 20 and the inlet 31 a formed in the lower pulsator 30. Further, as described in the second embodiment, the washing water is guided by the blade 37a so as to flow upward. As a result, the jetting power of the washing water upward increases.

FIG. 11 is an exploded perspective view of a pulsator assembly according to a fifth embodiment of the present invention. In the present embodiment, the configurations of the upper pulsator 20 and the lower pulsator 30 are similar to the embodiment shown in FIG. That is, the upper pulsator 20 is provided with the ejection portion 26 in which the ejection hole 25 is formed.
The upper pulsator 20 has an inlet 3
1b and a shielding rib 28 are formed. Inflow hole 31b
The structure and operation of the shielding ribs 28 are the same as those of the embodiment shown in FIG. However, in the present embodiment, the lower pulsator 30
A guide rib 44 is formed on the upper surface of the. The guide rib 44 extends from the center of the lower pulsator 30 to the outer peripheral surface. When the pulsator assembly 50 rotates, the washing water in the internal space relatively moves toward the guide rib 44. As a result, the washing water hits the guide ribs 44, and as a result, the washing water is compressed. Therefore, the washing water flows back more strongly into the guide groove 21 a formed by the stirring blades 21, and the jetting power of the washing water passing through the jet holes 25 further increases.

In the present embodiment, the guide ribs 44 are integrated with the lower pulsator 30, but the upper pulsator 2
0 can be formed integrally. Also, the guide rib 4
4 can also be made as a separate part from the upper pulsator 20 or the lower pulsator 30. in this case,
The guide rib 44 is fixed to the upper pulsator 20 or the lower pulsator 30 by a separate fixing member.

[0024]

As described above, according to the present invention,
When the pulsator assembly 50 rotates, the guide groove 21a
As a result, the washing water inside the pulsator assembly 50 flows backward and is ejected upward through the ejection holes 25. Therefore, an upward jet flow is generated in the washing tub 6 together with the rotating water flow, and a turbulent flow is generated in the washing tub. As a result, the laundry is not entangled or damaged, and the washing effect and the rinsing effect can be improved. As described above, the present invention has been specifically described based on the preferred embodiments. However, the present invention is not limited thereto, and it is needless to say that modifications and improvements can be made without departing from the gist of the present invention. is there.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a conventional washing machine.

FIG. 2 is a perspective view of a conventional pulsator.

FIG. 3 is an exploded perspective view of the pulsator assembly according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing the lower surface of the upper pulsator of FIG. 3;

FIG. 5 is a partially enlarged side sectional view taken along the line II of FIG. 3;

FIG. 6 is a partially enlarged side sectional view of the washing machine for explaining the operation of the pulsator assembly of FIGS. 3 to 5;

FIG. 7 is an exploded perspective view of a pulsator assembly according to a second embodiment of the present invention.

FIG. 8 is an exploded perspective view of a pulsator assembly according to a third embodiment of the present invention.

FIG. 9 is an enlarged sectional side view for explaining the operation of the pulsator assembly of FIG. 8;

FIG. 10 is an exploded perspective view of a pulsator assembly according to a fourth embodiment of the present invention.

FIG. 11 is an exploded perspective view of a pulsator assembly according to a fifth embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 20 upper pulsator 21 stirring blade 21a guide groove 25 ejection hole 26 ejection portion 28 shielding rib 29 coupling portion 30 lower pulsator 30a frame 31, 31a inlet hole 33 inclined surface 35, 35a coupling portion 37, 37a blade 44 guide rib 50 pulsator assembly

 ────────────────────────────────────────────────── ─── Continuing on the front page (31) Priority claim number 1997 34938 (32) Priority date November 29, 1997 (33) Priority claim country South Korea (KR) (31) Priority claim number 1997 34939 (32) Priority Date November 29, 1997 (33) Priority Country South Korea (KR)

Claims (5)

[Claims] 1. A pulsator assembly for a washing machine, which is rotated by a drive motor to generate a water flow in a washing tub, comprising: a disk-shaped lower pulsator installed on a bottom surface of the washing tub; An upper pulsator having a predetermined internal space formed between the upper pulsator and the lower pulsator, the upper pulsator being formed to project upward from the upper pulsator, and being formed on the lower surface of the upper pulsator; A plurality of stirring blades forming a plurality of guide grooves extending from the portion to the ejection holes, whereby the washing water in the internal space, which is subjected to a radial centrifugal force when the drive motor is driven, receives the guide grooves. Pulsator assembly for a washing machine, wherein the pulsator flows backward through the outlet and is ejected upward through the outlet. 2. The pulsator assembly according to claim 1, wherein at least one inflow hole is provided to provide a flow path for washing water to flow into the internal space. 3. The pulsator assembly according to claim 2, wherein the inflow hole is formed in the lower pulsator. 4. The pulsator assembly for a washing machine according to claim 3, wherein an edge of the inflow hole has an inclined surface such that washing water is guided into the internal space. 5. The pulsator assembly according to claim 1, further comprising a plurality of blades formed on a lower surface of the lower pulsator along a radial direction.