JP2002102583A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce washing irregularities by complexly changing the movement of the laundry, increase washing performance, and reduce the torque of a driving means by reducing the load to the driving means driving a rotary blade in a washing machine rotatably arranged with the rotary blade at the inner bottom section of a spinning tub. SOLUTION: The rotary blade 2 having a nearly pot-like inclined face 9 made higher in the outer peripheral direction at an outer peripheral section and stirring protruded ridge sections 10 on the upper face is rotatably provided at the inner bottom section of the spinning tub 3 rotatably provided in a receiving tub 1. The spinning tub 3 or the rotary blade 2 is rotatively driven by a motor 6, and a series of washing, rinsing, and spin-drying courses are controlled in sequence by a control means. The control means has a plurality of rotating time intervals at different revolving speeds when it drives the motor 6 on and off to inversely drive the rotary blade 2, and it executes the rotating time interval with a long on-time at a low revolving speed and the rotating time interval with a short on-time at a high revolving speed in turn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine having rotating blades rotatably disposed on the inner bottom of a washing and dewatering tub.

[0002]

2. Description of the Related Art Conventionally, this type of washing machine has been configured as shown in FIG. Hereinafter, the configuration will be described.

[0003] As shown in FIG. 4, a receiving tub 1 includes a washing and dewatering tub 3 in which a rotating blade 2 is rotatably arranged at an inner bottom portion, and is suspended from a washing machine outer frame 5 by a suspending rod 4. I have. The motor (driving means) 6 is attached to the bottom of the receiving tub 1, and is connected to the washing / dewatering tub 3 or the washing / dehydrating tub 3 via the clutch 8 and the washing / dehydrating shaft 7 for switching the transmission of rotational force to the washing / dehydrating shaft 7 during washing or dehydration. It is connected to the rotor 2.

The rotary blade 2 has a substantially pot-like shape having an inclined surface 9 which rises in the outer peripheral direction at the outer peripheral portion.
Is formed.

The water supply valve 11 supplies water to the washing and dewatering tub 3, and the drainage valve 12 drains the washing liquid and the rinsing liquid in the washing and dehydration tub 3. The control device 13 controls the motor 6, the water supply valve 11, the drainage valve 12, and the like to perform washing,
The respective steps of rinsing and dewatering are sequentially controlled.

When the operation is started after the laundry and the detergent are put into the washing and dewatering tub 3, the water supply valve 11 is opened to supply water to a predetermined water level, and then the motor 6 is driven. At this time, the clutch 8 of the transmission mechanism section
Is set to the washing side, and the power of the motor 6 is transmitted to the rotating blade 2 via the washing shaft, and the rotating blade 2 rotates. And
At this time, dirt is removed by friction between the laundry or the washing / dewatering tub 3 and the rotary wing 2.

In the dewatering process, after the washing is completed, the drain valve 12 is opened to drain the water in the washing and dewatering tub 3, the clutch 8 of the transmission mechanism is switched to the dewatering side, and the power of the motor 6 is dewatered. Is transmitted to the washing and spin-drying tub 3 through the rotator and rotated to apply centrifugal force to the laundry, thereby separating moisture from the laundry.

[0008]

In such a conventional construction, the rotary wing 2 has a substantially pot-like shape having an inclined surface 9 on the outer peripheral portion, and the laundry is wrapped around the laundry. Is in contact with Therefore, the agitating protrusion 10 provided inside the rotary blade 2 and the laundry are easily caught, and slippage is less likely to occur between the laundry and the rotary blade 2. Therefore, there is a problem that the movement of the laundry is not complicated and the unevenness in washing is large.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems by changing the movement of laundry in a complicated manner, reducing unevenness in washing, improving washing performance, and reducing the load on driving means for driving the rotating blades. It is intended to reduce the torque of the driving means.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a washing and dewatering tub rotatably provided in a receiving tub, and an inner peripheral portion having an inclined surface which rises in an outer peripheral direction at an outer peripheral portion. A rotatable blade having a substantially pot shape and having a protruding peak portion for stirring on the upper surface is rotatably provided, and a washing and dewatering tub or a rotary blade is rotationally driven by a driving means, and a series of steps such as washing, rinsing, and dehydrating by a control means. When the drive means is turned on and off to drive the rotor in reverse, the control means has a plurality of rotation time periods with different rotation speeds, and has a low rotation speed and a long on-time rotation. The time period and the rotation time period with a high rotation speed and a short on-time are alternately executed.

[0011] This makes it possible to change the movement of the laundry in a complicated manner, to reduce the unevenness of the washing, to enhance the washing performance, and to reduce the load on the driving means for driving the rotating blades to reduce the torque of the driving means. Can be reduced.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention described in the claims of the present invention
A washing and dewatering tub rotatably provided in the receiving tub, and a substantially pot type having a sloping surface which is rotatably provided on the inner bottom portion of the washing and dehydrating tub and has an outer peripheral portion having an inclined surface which becomes higher in the outer circumferential direction, and a protrusion for stirring is provided on the upper surface A rotating blade having a crest, a driving unit for rotationally driving the washing / dewatering tub or the rotating blade, and a control unit for sequentially controlling a series of steps such as washing, rinsing, and dehydration; When the driving means is turned on and off to reversely drive the rotor, the rotating blades have a plurality of rotation time periods having different rotation speeds, and have a long rotation time period at a low rotation speed and a short rotation time at a high rotation speed. The time period is executed alternately.When the rotor is driven to rotate, the rotation time period with a long on-time at a low rotation speed and the rotation time period with a short on-time at a high rotation speed are alternately executed. Can change the movement of the laundry in a complicated way , To reduce the washing unevenness, it is possible to enhance the cleaning performance, it is possible to reduce the torque of the drive means to be able to reduce the load on the drive means for driving the rotary blades.

[0013]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1 and FIG.
4 is a control means 15 constituted by a microcomputer.
And controls the operations of the motor (drive means) 6, the water supply valve 11, the drain valve 12 and the like via the power switching means 16 to sequentially control a series of steps such as washing, rinsing and dehydration. Further, the control means 15 has a rotation time limit of the plurality of rotating blades 2 having different rotation speeds, and these can be automatically executed sequentially. Reference numeral 17 denotes a commercial power supply, and reference numeral 18 denotes a power switch. Other configurations are the same as the conventional example.

The operation of the above configuration will be described. When the laundry and the detergent are put into the washing and dewatering tub 3 and the operation is started,
After the water supply valve 11 is opened to supply water to a predetermined water level, the motor 6 is driven. Then, the power of the motor 6 is transmitted to the rotor 2 via the washing shaft, and the rotor 2 rotates. By rotating the rotating blades 2, the laundry is stirred into the protruding ridges 1 of the rotating blades 2.
Hook to 0 and stir.

As shown in FIG. 3, the number of rotations and the time period of rotation of the rotor 2 at this time are such that two kinds of rotations are alternately executed at a constant time. First, at a high rotation speed of 120 r / min,
Short on-time, 1 second on-0.6 seconds off, 90
By inverting left and right for two seconds, the laundry can be stirred and the unevenness in washing can be reduced, and dirt can be removed by friction between the laundry and the laundry and the rotating blades 2.

Next, the laundry is turned left and right for 60 seconds at a low rotation speed of 60 r / min and a long ON time of 2 seconds ON-0.6 seconds OFF, whereby the laundry is stirred by the rotating blades 2. It can be hung firmly on the projecting ridge 10 for stirring,
The friction between the laundry and the laundry and the washing / dewatering tub 3 is increased, and the dirt can be removed.

Here, even if the left and right sides are reversed at a low rotational speed of 60 r / min and a short on-time (for example, 1 second on-0.6 second off), the laundry can be washed together with the laundry. The friction with the water tank 3 is small, and the dirt cannot be sufficiently removed. In addition, when the rotation speed is set to 120 r / min at a high rotation speed and reversed to the left and right with a long ON time (for example, 2 seconds ON-0.6 seconds OFF), the rotation blade 2 is caught too much by the agitating protrusion 10, There is a risk that the torque will increase or a locking phenomenon will occur in the worst case.

For this reason, by alternately executing the rotation time period of a long ON time at a low rotation speed and the rotation time of a short ON time at a high rotation speed, the movement of the laundry is changed in a complicated manner.
Washing unevenness can be reduced, washing performance can be improved, and the load on the motor 6 that drives the rotary blade 2 can be reduced, so that the torque of the motor 6 can be reduced.

In recent years, hot air has been supplied from a hot air blowing means comprising a drying blower and a heater into an inner tub (washing and dewatering tub) having a vertical axis of rotation in a vertical direction. Washing and rinsing the drying process of circulating high-temperature and high-humidity air generated by removing moisture from clothing (dry matter) through a circulation duct having a heat exchanger to dehumidify and dry;
Washing and drying machines have been proposed in addition to a series of steps such as dehydration.

In such a washer / dryer, the rotary blades are formed in a substantially pot shape having an inclined surface which rises in the outer peripheral direction on the outer peripheral portion, and the protruding ridge portion for stirring is provided on the upper surface, thereby improving the drying performance in the drying process. Therefore, when the rotating blade is driven in reverse during the washing or rinsing process, the rotating time period for a long on-time at a low rotational speed and the rotating time period for a short on-time at a high rotational speed are alternately executed, whereby the washing is performed. The unevenness can be reduced, the cleaning performance can be improved, and the load on the driving means for driving the rotor can be reduced, so that the torque of the driving means can be reduced.

[0022]

As described above, according to the invention described in the claims of the present invention, the washing and dewatering tub is rotatably provided in the receiving tub, and the washing and dewatering tub is rotatably provided on the inner bottom portion of the washing and dewatering tub. A rotating blade having a substantially pot shape having an inclined surface rising in the outer peripheral direction on the outer peripheral portion and having a protruding peak portion for stirring on the upper surface, a driving unit for rotating and driving the washing and dewatering tub or the rotating blade, washing, rinsing,
Control means for sequentially controlling a series of processes such as dehydration, and the control means has a plurality of rotation time periods having different rotation speeds when the driving means is turned on and off to reversely drive the rotor. In addition, since the rotation period of the long ON time at the low rotation speed and the rotation period of the short ON time at the high rotation speed are alternately executed, the movement of the laundry can be changed in a complicated manner, and the washing unevenness is reduced. In addition, the cleaning performance can be improved, and the load on the driving means for driving the rotating blades can be reduced, so that the torque of the driving means can be reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a washing machine according to an embodiment of the present invention.

FIG. 2 is a block circuit diagram of the washing machine.

FIG. 3 is a basic pattern diagram of a water flow of the washing machine.

FIG. 4 is a sectional view of a conventional washing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Receiving tank 2 Rotor blade 3 Washing and dewatering tank 6 Motor (drive means) 9 Inclined surface 10 Protruding peak part for stirring 15 Control means

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Yuko Minayoshi 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. F term (reference) 3B155 AA10 BB08 BB15 CA06 HC05 KB27 LA11 LB18 LB25 LC02 LC06 LC14 LC15 LC28 MA01 MA07 MA09

Claims (1)

[Claims] 1. A washing and dewatering tub rotatably provided in a receiving tub, and a substantially pot type having an inclined surface which is rotatably provided on an inner bottom portion of the washing and dewatering tub and has an outer peripheral portion which rises in an outer peripheral direction. A rotating blade having a protruding peak for stirring on the upper surface, a driving unit for rotating the washing and dewatering tub or the rotating blade, and a control unit for sequentially controlling a series of steps such as washing, rinsing, and dewatering, The control unit has a plurality of rotation time periods having different rotation speeds when the drive unit is turned on and off to drive the rotor in reverse, and has a low rotation speed, a long on-time rotation time period, and a high rotation speed. A washing machine that alternately executes a short on-time rotation period.