JPH10337394A - Pulsator for washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulsator for washing machine for improving washing ability by generating irregular eddies within a washing tank not to generate entangling of the washing. SOLUTION: The pulsator 41 for washing machine comprises the main body 43 provided rotatably about the central axis vertical to the washing tank, a plurality of first blades 49 projected from the upper surface of the main body 43 and extended radially about the central axis, and a plurality of second blades 50 extended radially about at least a pair of eccentric axes disposed to be symmetrical to each other about the central axis, separated from the central axis. The first and second blades 49, 50 generate irregular eddies within the washing tank, thereby to prevent the washing from entangling and to improve the washing ability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulsator for a washing machine, and more particularly, to a method for generating an irregular swirl in a washing tub to prevent tangling of laundry and improve washing power. To a washing machine pulsator.

[0002]

2. Description of the Related Art A pulsator for a washing machine is rotatably provided in a washing tub and generates a rotating water flow for washing laundry.

FIG. 5 is a longitudinal sectional view of a washing machine provided with a conventional washing machine pulsator. The washing machine 111 includes an outer casing 113 forming an appearance, and a washing system 121 suspended and supported in the outer casing 113 to wash laundry. The washing system 121 includes a washing tub 123 for storing laundry, a pulsator 101 rotatably provided in the washing tub 123, and a driving unit 131 for driving the pulsator 101 to rotate.

FIG. 6 is an overall perspective view of a conventional pulsator for a washing machine. The pulsator 101 for a washing machine has a disk-shaped main body 103, and a central ridge 107 coupled to a drive shaft of a drive section 131 is provided in a central region of the main body 103. On an upper surface of the main body 103, a plurality of water flow forming blades 105 for forming a washing water flow are formed.
These water flow forming blades 105 extend radially from the central raised portion 107.

[0005] The pulsator 101 is driven by the driving force of the driving unit 131 and rotates in the forward and reverse directions.
Generate a forward / reverse washing water flow for washing the laundry stored in the washing machine. The washing water flow spreads radially in the lower region of the washing tub 123 due to the centrifugal force of the pulsator 101,
After ascending along the inner wall surface of the washing tub 123, it descends at the center to form a circulation loop as seen in the drawing. In such a state, the laundry in the washing tub 123 flows along the circulating water flow, and is washed not only by the action of the water flow but also by collision with the pulsator 101 and the inner wall of the dewatering tub.

[0006] Radially formed water flow forming blades 105
Generates a uniform centrifugal force in the circumferential direction, and
A substantially uniform circulating water flow is generated inside the washing tub 123, and the uniform washing water flow easily induces entanglement of the laundry in the washing tub 123, resulting in a decrease in washing efficiency. In addition, the entanglement easily damages the laundry during the washing or dewatering process, and makes it difficult for a user to clear the laundry.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an irregular swirl in a washing tub so as to prevent the laundry from being entangled in consideration of the conventional problems. In addition, it is an object of the present invention to provide a pulsator for a washing machine in which the washing power is improved.

[0008]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pulsator for a washing machine, wherein the main body is provided in a washing tub so as to be rotatable with respect to a vertical central axis; A plurality of first blades protruding from and extending radially with respect to the central axis; and at least one pair of eccentric axes spaced apart from the central axis and arranged to be symmetrical with respect to the central axis. A plurality of second blades radially extended with respect to the pulsator for a washing machine.

A cover member formed with an outlet opening upwardly along the central axis to form a plurality of fan chambers with the main body and coupled to an upper surface of the main body; A plurality of jet fans that are rotatably provided in the fan chamber with respect to the eccentric axis and that jets washing water upward through the jet ports; and a rotation driving unit for the jet fans, the jet fans rise vertically into the washing tub. A water flow can be generated.

In this case, the main body may include a meshing groove protruding upward so as to mesh with a lower edge of the cover member, and the meshing groove surrounds a lower end of the cover member. It is desirable to do so.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a longitudinal sectional view of a washing machine having a pulsator for a washing machine according to the present invention. Washing machine 1
Has an outer casing 3 forming an appearance, and a washing system 11 suspended and supported in the outer casing 3. The washing system 11 includes a washing tub 13 suspended and supported by a suspension device 21, and a driving unit 31 provided below the washing tub 13. Dehydration tub 1 in washing tub 13
7 is rotatably provided, and a pulsator 41 is rotatably provided in the dewatering tank 17.

The suspension device 21 has a suspension bar 23 and a damper 25 provided on the outer wall surface of the out tub 15. The upper end of the suspension bar 23 is connected to the outer casing 3, and the lower end is connected to the damper 25.

The drive unit 31 includes a drive motor 33 and a shaft assembly 35 for selectively providing the drive force of the drive motor 33 to the dewatering tub 17 and the pulsator 41. The shaft assembly 35 is controlled by a control unit (not shown) to rotationally drive the pulsator 41 at the time of washing, and to rotate the pulsator 41 at the time of dehydration and the dehydration tub 17 integrally. The shaft assembly 35 and the drive motor 33 are mutually connected through a pulley 37 and a belt 39 so as to be able to transmit power.

FIG. 2 is an enlarged sectional view of the pulsator cut along the line II-II in FIG. 3, and FIG.
1 is an overall perspective view of a pulsator according to the present invention, and
FIG. 4 is a plan view of the pulsator body according to the present invention.
As can be seen from the drawing, the pulsator 41 for the present washing machine
Has a disk-shaped main body 43. In the lower central region of the main body 43, a central raised portion 45 connected to the drive shaft 38 and a pair of washing water inlets 51 arranged to be symmetrical with respect to the central axis are provided. Washing water inlet 5
1 is provided with a perforated plate filter 53 for blocking the inflow of debris mixed with the washing water. A cover member 71 is connected to the upper surface of the main body 43.

The cover member 71 has a spout 75 which is opened upward at the center, and forms a pair of fan chambers 77 facing the rotation axis with the main body 43. Accordingly, the cover member 71 has a pair of fan chamber portions 72 formed integrally with the central ejection portion 74 in which the ejection port 75 is formed. The spout 75 is opened upward in the axial direction of the main body 43 in the central region of the upper surface of the cover member 71. The fan chamber 72 includes a plurality of scattered water holes 73.
Are formed.

The connection between the cover member 71 and the main body 43 is made by a receiving rib 67 projecting upward so as to receive the edge 79 of the cover member 71 from the upper edge of the cover member 71 and the upper surface of the main body 43. . On the inner side of the main body adjacent to the receiving rib 67, a meshing groove 65 in which the edge 79 of the cover member 71 is interposed is formed so as to be depressed.

A jet fan 81 is provided in each of the fan chambers 77, and a duct member 91 is interposed between the jet fans 81 to guide the water flow from the fan chambers 77 to the jet ports 75. . The jet fan 81 has a fan shaft 83 parallel to the rotation axis of the main body 43.
And a plurality of fan blades 85 radially extended from the fan shaft 83. The jet fan 81 also has a disk-shaped lateral support plate 87 that integrally connects the axial ends of the fan blades 85. The axis of the fan shaft 83 is disposed at an eccentric position that is separated from the rotation axis of the main body 43 by a predetermined distance.

The jet fan 81 is rotated by a pinion 89 provided at a free end of a fan shaft 83 and a drive gear 57 fixed to the bottom of the washing tub 13 and meshing with the pinion 89. The pinion 89 is formed integrally with the fan shaft 83 by injection molding or separately manufactured and assembled. The drive gear 57 has a cylindrical shape,
A plurality of fastening holes are formed in a flange formed along the lower edge. The drive gear 57 is fixed by fastening means 61 connected to the bottom of the washing tub 13 through these fastening holes. When the pulsator 41 rotates while the driving gear 57 meshes with the pinion 89, the jet fan 81 accommodated in the fan chamber 77 also rotates.

The duct member 91 arranged between the two fan chambers 77 has an inclined guide surface 93 for guiding the water flow from the fan chamber 77 to the central jet port 75. Flow guide projections 63 are provided on both side edges of the shaft coupling portion 45 to fix the shaft member 45 with the duct member 91 interposed therebetween.

On the other hand, the water flow forming blade formed on the upper surface of the main body 43 has two first blades 49 extending radially with respect to the central axis of the main body 43 and an eccentric axis forming the rotation axis of the jet fan 81. And four second blades 50 radially extended with respect to the second blade 50. The first blade 49 and the second blade 50
By generating different rotating water flows by their different arrangements, an irregular vortex is formed in the washing tub.

With such a configuration, the washing machine pulsator 41 according to the present embodiment is rotated by the driving force transmitted through the shaft assembly 35 when the driving motor 33 is operated after the washing operation is started. . When the pulsator 41 rotates, the jet fan 81 provided in the fan chamber 77 revolves with respect to the rotation axis of the pulsator 41, and at the same time, interacts with the drive gear 57 fixed to the bottom of the washing tub 13. It comes to spin on. At this time, the washing water in the fan chamber 77 moves toward the jet port 75 by the rotational force of the jet fan 81 and is jetted upward through the jet port 75. In addition, the washing water at the lower part of the pulsator 41 flows into the fan chamber 77 through the washing water inlet 51.

A part of the washing water dispersed in the fan chamber 77 is discharged through the scattered water flow holes 73 to form a scattered water flowing upward in the radial direction. The rising water column spouted through the spout 75 opposes the water flow descending at the center of the washing water flow circulating in the washing tub 13 in a certain direction when the pulsator 41 rotates, while suppressing the vertical descent of the circulating water flow. And disperse in the radial direction. The dispersed washing water is locally upwardly flown by the splash water flow discharged through the splash water flow holes 73.

On the other hand, when the pulsator 41 rotates forward and backward,
The first blade 49 and the second blade 50 form different rotating water flows to form a complicated and irregular vortex in the washing tub 13.

[0024]

As described above, according to the present invention, an irregular swirl is formed in the washing tub to prevent the laundry from tangling,
Further, a pulsator for a washing machine capable of improving the washing power is provided.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a washing machine having a pulsator for a washing machine according to the present invention.

FIG. 2 is an enlarged sectional view of the pulsator cut along a line II-II in FIG. 3;

FIG. 3 is an overall perspective view of a pulsator according to the present invention.

FIG. 4 is a plan view of a pulsator body according to the present invention.

FIG. 5 is a longitudinal sectional view of a washing machine having a conventional pulsator for a washing machine.

FIG. 6 is an overall perspective view of a conventional washing machine pulsator.

[Explanation of symbols]

 Reference Signs List 3 outer casing 11 washing system 13 washing tub 21 suspension device 31 drive unit 41 pulsator 43 main body 45 central raised portion 49 first blade 50 second blade 51 washing water inlet 53 filter 65 meshing groove 67 receiving rib 71 cover member 75 spout 77 Fan chamber 79 Edge 81 Jet fan 83 Fan shaft 85 Fan blade

Claims (4)

[Claims] 1. A pulsator for a washing machine, comprising: a main body rotatably provided in a washing tub with respect to a vertical central axis; a main body protruding from an upper surface of the main body and extending radially with respect to the central axis. A plurality of first blades; and a plurality of second blades radially extended with respect to at least a pair of eccentric axes arranged so as to be symmetrical with respect to the central axis and spaced apart from the central axis. A pulsator for a washing machine, comprising: 2. A cover member having an outlet opening upwardly along the central axis, forming a plurality of fan chambers with the main body, and being coupled to an upper surface of the main body; 2. The jet fan according to claim 1, further comprising: a plurality of jet fans provided rotatably with respect to the eccentric axis in the chamber to jet the washing water upward through the jet ports; and a rotation driving means for the jet fans. A pulsator for a washing machine according to the above. 3. The pulsator for a washing machine according to claim 2, wherein the main body includes a meshing groove protruding upward to mesh with a lower edge of the cover member. 4. The pulsator for a washing machine according to claim 3, wherein the engagement groove surrounds a lower end portion of the cover member.