JP2010187722A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine capable of enhancing cleaning properties while reducing detergent remnants and unevenness of washing and saving water by turning the wash upside down and making the wash change positions. <P>SOLUTION: The washing machine includes a washing/spin-drying tub 3 rotatably provided inside a rest tub 1, rotary vanes 2 rotatably disposed in the bottom inside the tub 3, a drive means 9 for rotation-driving the tub 3 or the vanes 2 and a control means 21 for sequentially controlling a series of processes such as washing, rinsing and spin-drying. The control means 21, when reversely driving the vanes 2 through turning the means 9 on/off, sets the number of revolutions of right-handed rotations different from those of left-handed rotations in a single reversal. Thereby the washing machine reduces the detergent remnants or unevenness of washing, realizing water saving and improvement of the cleaning properties. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a washing machine having rotating blades rotatably disposed on the inner bottom of a washing and dewatering tub.

  Conventionally, this type of washing machine has the same setting for the number of rotations in each direction in the left-right direction, and has a plurality of rotation time periods with different rotation speeds. In other words, a short on-time rotation time period is alternately executed (see, for example, Patent Document 1).

  11 and 12 show a basic pattern diagram of the conventional washing machine described in Patent Document 1 and the water flow of the washing machine.

A washing and dehydrating tub 103 rotatably provided in the receiving tub 101, and a substantially pan-like shape having an inclined surface which is rotatably provided on the inner bottom portion of the washing and dehydrating tub 103 and which increases in the outer circumferential direction on the outer peripheral portion. A rotary blade 103 having a protruding protrusion 110 for stirring, a driving means (motor) 106 for rotationally driving the washing / dehydrating tub 102 or the rotary blade 103, and a control means for sequentially controlling a series of steps such as washing, rinsing and dehydration. 114, and the control means 114 has a plurality of rotation time periods with different rotation speeds when the drive means 106 is turned on / off to reversely drive the rotating blades 102, and the rotation speed is low and the rotation time is long. Alternately execute a time period and a high on-speed rotation time period with a short on-time.
JP 2000-302198 A

  However, in the conventional configuration, the amount of water used is reduced due to recent environmental and energy saving considerations and increased response. Therefore, when trying to reduce the bath ratio (L / kg) for easy washing, Since the number of rotations is the same, the laundry put in the washing and dehydrating tub repeats the operation of reciprocating at almost the same position in the washing and dehydrating tub, and the laundry moves up and down, reverses, That is, there is a problem that the movement of the laundry position is not easily generated, and the detergent residue and the washing unevenness are increased.

  The present invention solves the above-mentioned conventional problems, and creates the vertical movement and upside down of the laundry, and the movement of changing the position of the laundry, reducing detergent residue and washing unevenness, water saving and washing performance It aims at providing the washing machine which can realize improvement of.

  In order to solve the above-described conventional problems, a washing and dewatering tub provided rotatably in a receiving tub, a rotary blade rotatably disposed on an inner bottom portion of the washing and dewatering tub, Drive means for rotationally driving the rotor blades, and control means for sequentially controlling a series of processes such as washing, rinsing, and dewatering, the control means driving the drive means on and off to drive the rotor blades. When reverse driving is performed, the rotational speed in the left-right direction is set differently.

  As a result, the laundry can be moved up and down, turned upside down, and moved to change the position of the laundry, so that the remaining detergent and uneven washing can be reduced, and water saving and improved washing performance can be realized.

  The washing machine of the present invention can achieve water saving and improved washing performance.

  According to a first aspect of the present invention, there is provided a washing and dewatering tub that is rotatably provided in a receiving tub, a rotating blade that is rotatably disposed at an inner bottom portion of the washing and dehydrating tub, and the washing and dewatering tub or the rotating wing. A drive means for rotationally driving, and a control means for sequentially controlling a series of processes such as washing, rinsing, and dehydration, and the control means drives the drive means on and off to reversely drive the rotor blades. By changing the number of rotations in the left and right direction, the laundry moves up and down, flips up and down, and moves to change the position of the laundry, reducing detergent residue and uneven washing, saving water and washing performance Improvement can be realized.

  According to a second invention, in the first invention, the on / off time of the rotor blade is made shorter than the on time, thereby shortening the left / right inversion time and generating a movement that changes the position of the laundry more. be able to.

  In a third aspect of the present invention, in the first or second aspect, when reverse driving is performed at different rotational speeds, the on-time at the low rotational speed is set longer than the on-time at the high rotational speed, so that the laundry is reversed. Acceleration can be increased, and it becomes easier to change the position of the laundry, and since mechanical force can be applied, the cleaning performance can also be improved.

  In a fourth aspect of the present invention, in any one of the first to third aspects, the rotation of the predetermined time in the left-right direction and the predetermined off time are set as one inversion, and the periodic pattern is configured by a plurality of inversions. The left / right on / off time and the number of rotations are set so that the number of rotations on the left and right constitutes a reverse periodic pattern opposite to the periodic pattern, and the combination of the periodic pattern and the reverse periodic pattern is alternated. By doing so, tangling of the laundry can be reduced.

  5th invention is provided with the cloth amount ground detection means which determines the quantity of the laundry put into the washing and dewatering tank in any one of 1st-4th invention, The determination result of the said cloth amount detection means Accordingly, by setting at least one of the on / off time and the number of rotations to be different, it is possible to perform optimum washing according to the amount of washing.

  According to a sixth invention, in any one of the first to fifth inventions, the shape of the rotor blade is provided with a protruding peak portion for stirring radially on a substantially pan-shaped base having an inclined surface on an outer peripheral portion, and the stirring Since the projecting mountain portion has a substantially trapezoidal shape with cross sections on both sides, the laundry can be easily turned upside down.

  According to a seventh invention, in any one of the first to sixth inventions, the control means has a stirring process in which the rotational speed in the left-right direction is set differently and a stirring in which the rotational speed in the left-right direction is set to the same rotational speed. By executing the process at least once, it is possible to complicate the movement of the laundry such as upside down and reciprocation of the laundry, thereby preventing uneven cleaning and improving the cleaning performance.

  According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the control means includes a stirring step in which the rotational speed in the left-right direction is set differently and a stirring in which the rotational speed in the left-right direction is set to the same rotational speed. By combining and executing the process and the tank rotation process for rotating the washing and dewatering tank, it is possible to reduce the damage and entanglement of the laundry.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention, FIG. 2 is a perspective view in which the outer tub of the washing machine is partially cut out, and FIG. 3 is a partially cut out view of the washing machine. FIG. 4 is a block circuit diagram of the washing machine, and FIG. 5 is a timing chart of the stirring time of the washing machine.

  In FIG. 1, a receiving tub 1 includes a washing and dewatering tub 3 rotatably disposed inside, and a rotary blade 2 is rotatably disposed on the inner bottom of the washing and dewatering tub 3 via a speed reduction mechanism 4. At the same time, the suspension rod 7 is suspended from the washing machine outer frame 8. A receiving tank cover 6 is provided at the upper opening of the receiving tank 1 via a packing 5. The shape of the rotor blade 2 is provided with a protruding protrusion 31 for stirring radially on a substantially pan-shaped base having an inclined surface on the outer periphery, and the protruding protrusion 31 for stirring has a substantially trapezoidal shape with a cross section on both sides. It is configured.

  Reference numeral 9 denotes a motor serving as a driving unit that rotationally drives the washing and dewatering tub 3 via the speed reduction mechanism 4. The water supply valve 10 supplies water into the washing / dehydrating tank 3, the water level detection means 11 detects the water level in the receiving tank 1, and the drain valve 12 drains the washing liquid in the receiving tank 1. To do.

  As shown in FIG. 2, a foam chamber 13 positioned above the inner bottom 1 a of the receiving tank 1 is formed on the inner surface of the receiving tank 1, and a packing 5 is provided at an opening at the top of the foam chamber 13. The lid 14 (shown in FIG. 3) formed on the receiving tank cover 6 is hermetically sealed, and a part of the circulation path 15 is formed in a part of the lid 14, and a bubble is formed at the tip of the circulation path 15. A discharge unit 16 is provided.

  Further, as shown in FIG. 2, the side plate 17 that forms the outer peripheral portion of the foam chamber 13 is formed so as to spread outward from the inner surface of the receiving tank 1 in the rotational direction, and the foam chamber 13 and the receiving tank 1. A partition plate 18 for partitioning the inside is provided. The guide plate 19 constituting the bottom surface of the bubble chamber 13 is formed to be curved upward in the rotation direction.

  As shown in FIG. 3, the foam discharge unit 16 has a foam discharge direction that is the same as the rotation direction of the washing / dehydrating tub 3, and the discharged foam is from the substantially central portion 3 a to the outer peripheral portion. It is formed to take up to 3b.

  As illustrated in FIG. 4, the control device 20 includes a control unit 21 configured by a microcomputer and connected to an input setting unit 24 and a display unit 25, and a power switching unit 22, via the power switching unit 22. The motor 9, the water supply valve 10, the drain valve 12, etc. are controlled to control each step of washing, rinsing and dehydration. The cloth amount detection means 23 detects the amount of laundry in the washing and dewatering tub 3.

  The input setting means 24 sets a driving course and the like. The control means 21 inputs information from the input setting means 24 and displays it on the display means 25 based on the information to notify the user. Reference numeral 26 denotes a commercial power source, and 27 denotes a power switch.

  The operation in the above configuration will be described. When the laundry and detergent are put into the washing and dewatering tub 3 and the operation is started, the control means 21 operates the water supply valve 10 to start water supply. When the water level detection means 11 detects a predetermined water level lower than the normal washing water level (for example, about ¼ of the washing water level), a signal is sent to the control means 21 and the operation of the water supply valve 10 is stopped. Then, it moves to a detergent dissolution process, the motor 9 is driven by the control means 21, and the washing and dewatering tub 3 is rotated. Since the rotation speed at this time is set lower than the subsequent foam stroke, the detergent is dissolved without discharging the washing liquid from the foam discharge section 16 before the detergent is dissolved.

Next, the process moves to a foaming process in which foam is pumped or discharged, and the washing and dewatering tank 3 is rotated at a higher rotational speed than that in the detergent dissolving process, so that the space between the washing and dehydrating tank 3 and the receiving tank 1 is increased. A large amount of air is sent into the washing liquid to mix them, generating a large amount of foam. And since the large amount of generated foam has a low specific gravity, it moves to the upper part of the washing liquid and vigorously enters the foam chamber 13 while rotating inside the receiving tub 1.

  The foam that has entered the foam chamber 13 is pumped upward by changing the speed component from the horizontal direction to the vertical direction along the guide plate 19, and is passed through the circulation path 15 from the foam discharge section 16 into the washing and dewatering tub 3. From above. At this time, since the foam discharge direction of the foam discharge unit 16 is the same as the rotation direction of the washing / dehydrating tub 3, the speed of the discharged foam and the laundry in the washing / dehydrating tub 3 or the laundry in the washing / dehydrating tub 3 is A difference can be made small and it can prevent that the bubble which fell falls on the laundry in the washing and dewatering tank 3 or the laundry in the washing and dewatering tank 3, and jumps.

  Moreover, since the foam discharge part 16 is comprised so that the discharged foam may be applied from the substantially center part 3a of the washing and dewatering tank 3 to the outer peripheral part 3b, the laundry in the washing and dewatering tank 3 is partially washed. Even if it protrudes from the upper surface of the liquid, if the washing and dewatering tub 3 rotates, the foam can be applied to the laundry in the washing and dewatering tub 2 evenly.

  After executing the bubble stroke, the control means 21 operates the water supply valve 10 to start water supply. When the water level detection means 11 detects the set water level (normal washing water level), a signal is sent to the control means 21 and the operation of the water supply valve 10 is stopped. And the motor 9 is driven by the control means 21, the rotary blade 2 is reversed for a predetermined time, and the washing process is executed to perform washing.

  As shown in FIG. 5, the rotation speed and the rotation time limit of the rotor blades 2 in the washing process execute rotations at different rotation speeds in the left-right direction for a certain period of time. First, an on time t seconds (eg, 0.8 seconds) is executed at a low rpm brpm (eg, 110 rpm), an off time after t seconds is executed, and then at a high rpm arpm (eg, 120 rpm). , Execute on-time t seconds. The reversing operation of the reciprocating operation is performed for a predetermined time.

  As described above, according to the present embodiment, since the rotational speed in the left-right direction is set differently, the movement of changing the position of the laundry is caused by causing the laundry to move in the left-right rotation. In addition, the laundry can be flipped up and down by moving the direction of rotation or reversed up and down by the difference in acceleration when the rotation direction is switched. Thereby, for example, the laundry that was in the upper part in the washing and dehydrating tub 3 sinks downward, and the laundry that was in the lower part in the washing and dehydrating tub 3 is moved upward so that the detergent remains. It can reduce the unevenness of washing and improve water saving and washing performance.

(Embodiment 2)
FIG. 6 is a timing chart showing the operation of the washing machine in the second embodiment of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, after the on-time t1 seconds (for example, 0.8 seconds) is executed at the low rpm brpm, the off-time after t2 seconds (for example, 0.6 seconds) shorter than the on-time t1 is executed. Then, an on-time t1 second is executed at a high rotational speed arpm. By performing the reversing operation of the reciprocating operation for a certain period of time, shortening the switching time of the left-right reversal makes it easier to generate the laundry jump-up operation and increase the amount of movement of the laundry position. And cleaning performance can be improved.

(Embodiment 3)
FIG. 7 is a timing chart showing the operation of the washing machine in the third embodiment of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this embodiment, after the on-time t1 second is executed at the low rpm brpm, the off-time t2 seconds (<t1) shorter than the on-time t1 is executed, and then the on-time t3 at the high rpm arpm. After executing the second (<t1), an off time t4 seconds (<t3) shorter than the on time t3 is executed. By performing the reversing operation of the reciprocating operation for a certain period of time, acceleration for reversing can be increased, and it becomes easier to change the position of the clothes, and the cleaning performance can be enhanced. Furthermore, since rotation at a low rotation speed reduces centrifugal force compared to rotation at a high rotation speed, the swirling of the receiving tub 1 and the washing and dehydrating tub 3 that occurs when the laundry is rotated is reduced, and the washing machine Vibration can be reduced.

(Embodiment 4)
FIG. 8 is a timing chart showing the operation of the washing machine in the fourth embodiment of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, each rotation in the left-right direction is set as one reversal 28, a periodic pattern 29 is formed by a plurality of reversals, and the setting of the on / off time limit and the number of rotations in the left-right direction is defined as the periodic pattern 29. Combinations of reverse cycle patterns 30 that are reverse cycle patterns having opposite left and right rotational speeds are executed alternately.

  As described above, according to the present embodiment, when the same periodic pattern is repeated, the laundry easily moves in the same rotation direction. Therefore, when it is repeated a plurality of times, the laundry is gradually entangled. The reverse periodic pattern 30 is executed for this entanglement, and the laundry is moved in the reverse rotation direction, thereby creating a movement for loosening the laundry, and the entanglement can be reduced.

(Embodiment 5)
FIG. 9 is a timing chart showing the operation of the washing machine in the fifth embodiment of the present invention. In addition, about the same part as the said Embodiment 1, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In the present embodiment, the on / off time of the rotor blade 2 is changed according to the output of the cloth amount detection means 23, that is, the amount of laundry, and it is determined that the amount of laundry is greater than a predetermined amount. Sets the on time t5 longer than the standard set time t (same as in the first embodiment), and if it is determined that the amount of laundry is less than the predetermined amount, sets the on time t6 (<t) to be shorter. . The on time t5 is set longer than the on time t9. Also, regarding the off time, when it is determined that the amount of laundry is greater than the predetermined amount, the off time t7 is set longer than the standard setting time t (similar to the first embodiment), and the amount of laundry is the predetermined amount. When it is determined that the time is less than the standard time t, the off time t8 is set shorter than the standard setting time t.

  The rotational speed of the rotary blade 2 is also set to a rotational speed c (> a), d (> b) higher than the standard setting rotational speeds a and b when it is determined that the amount of laundry is large. When it is determined that the amount of the object is small, the optimum stirring time period according to the amount of laundry is set by setting the rotation speeds e (<a) and f (<b) lower than the standard rotation speeds a and b. This prevents the laundry from being damaged by washing a small amount of laundry with a strong stirring time, and the outer tub 1 hits the outer frame 8 of the washing machine due to the reaction caused by the reversal force of the rotary blades 2, and generates an abnormal sound. Can prevent adverse effects.

  Moreover, you may make it change not only the right-and-left rotation speed and the ON time of the rotary blade 2, but the OFF time.

  Further, the shape of the rotary blade 2 is provided with a protruding peak portion for stirring radially on a substantially pan-shaped base having an inclined surface on the outer peripheral portion, and the protruding peak portion 31 for stirring has a substantially trapezoidal shape with cross sections having slopes on both sides. As a result, when the rotary blade 2 is driven in reverse, the laundry moves in the outer circumferential direction so as to trace the surface of the rotary blade 2 on the substantially pan-shaped surface due to the centrifugal force, so that it becomes easy to generate upward movement by itself. . Therefore, it is easy to generate a vertical movement as the movement of the entire laundry, and the laundry can be easily flipped upside down or replaced. Further, it is possible to reduce the load on the driving means for driving the rotary blade 2 and to reduce the torque of the driving means.

(Embodiment 6)
Further, as shown in FIG. 10, the clothing is turned upside down or reciprocated by executing at least one stirring process in which the rotational speed in the left-right direction is set differently and a stirring process in which the rotational speed in the left-right direction is the same. The movement of laundry, such as exercise, can be complicated, washing unevenness can be prevented, and washing performance can be further enhanced.

(Embodiment 7)
The control means 21 drives the motor 9 after reaching the set water level (ordinary washing water level), drives the washing / dehydrating tub 3 by the motor 9 to drive the washing / dehydrating tub 3 by reversing the rotor blades 2 for a predetermined time, and A tank rotation process for rotating the water tank 3 is executed, and the stirring process and the tank rotation process are repeated a predetermined number of times.

  In the tank rotation process, the washing and dewatering tank 3 is driven by the motor 9 and the rotation speed of the washing and dewatering tank 3 is increased. As the rotational speed increases, the force for stirring the detergent solution in the washing / dehydrating tub 3 increases, and the water surface in the washing / dehydrating tub 3 is lowered at the center as shown in FIG. The inner wall portion of the washing / dehydrating tub 3 is finally raised, and water is sprayed from the sprinkling discharge portion 12 into the washing / dehydrating tub 3 beyond the height of the upper end of the washing / dehydrating tub 3. In addition, since the thrown-in laundry is in a state of sticking from the central portion of the washing and dewatering tub 3 toward the inner wall portion by centrifugal force due to an increase in the rotational speed, the tangling of the laundry is loosened and alleviated. .

  In this way, the washing power is increased while frequently changing clothes up and down by the stirring process with different rotational speeds in the left and right directions, and the water flow is relatively difficult to entangle with the stirring process at the same rotational speed. It is possible to improve the cleaning power and reduce the entanglement by removing the dirt by the mechanical force and loosening the entanglement of the laundry by the tank rotation process of rotating the washing and dewatering tub. If this process is carried out in order, the effect is the highest, but even if the order is changed and combined and executed, the damage and entanglement of the laundry can be reduced.

  In addition, the stirring process with different rotation speeds in the left and right direction allows the laundry to be swapped up and down and has high cleaning power, but there are some aspects where the laundry is easily entangled, but the stirring process with the same rotation speed in the left and right direction Then, the laundry is hard to get entangled and has a cleaning effect. Furthermore, the tangling of the laundry can be loosened by the tank rotation process of rotating the washing and dehydrating tub, and the tangling of the laundry before the dehydration after draining the washing liquid can be suppressed to the minimum. Laundry bias that causes noise is less likely to occur.

  Further, the set water level, the set rotation speed, the set time, the number of repetitions, the number of times of reversal of the reversing process, etc. described in the present embodiment are merely examples, and modifications and variations thereof are also described in the scope of the claims. It is included in the present invention based on the idea.

  As described above, the washing machine according to the present invention can turn the laundry upside down or change the position of the laundry, thereby reducing the amount of detergent residue and uneven washing and improving the washing performance while saving water. Useful as a washing machine.

  As described above, the washing machine according to the present invention can reduce detergent residue and washing unevenness, and can realize water saving and improvement in washing performance. Therefore, the drum type washing machine that stirs with a baffle by rotating the drum. And can be applied to drum-type washing machines equipped with rotating blades.

1 is a longitudinal sectional view of a washing machine according to Embodiment 1 of the present invention. Perspective view with a part cut away of the outer tub of the washing machine Partial perspective view of the washing machine with a part cut away. Block diagram of the washing machine Timing chart of the stirring time of the washing machine Timing chart of stirring time limit in Embodiment 2 of the present invention Timing chart of stirring time limit in Embodiment 3 of the present invention Timing chart of stirring time limit in Embodiment 4 of the present invention (A) Timing chart of the stirring time when the amount of laundry in Embodiment 5 of the present invention is large (b) Timing chart of the stirring time when the amount of laundry is small Timing chart of stirring time limit in Embodiment 6 of the present invention Vertical section of a conventional washing machine Basic pattern of water flow in a conventional washing machine

DESCRIPTION OF SYMBOLS 1 Receiving tank 2 Rotating blade 3 Washing and dewatering tank 9 Drive means (motor)
21 Control means

Claims (8)

A washing and dewatering tub rotatably provided in the receiving tub; a rotary blade rotatably disposed at an inner bottom portion of the washing and dehydrating tub; and a driving means for rotationally driving the washing and dehydrating tub or the rotary wing. Control means for sequentially controlling a series of steps such as washing, rinsing, dehydration, etc., and when the control means drives the driving means on and off to reversely drive the rotor blade, A washing machine characterized by having different settings. The washing machine according to claim 1, wherein the off time is shorter than the on time. 3. The washing machine according to claim 1, wherein when the reversal drive is performed at different rotational speeds, the on time of the low rotational speed is set longer than the on time of the high rotational speed. Rotation for a predetermined time in the left and right direction and a predetermined off time are set as one inversion, a periodic pattern is formed by a plurality of inversions, and the on / off time and the number of rotations in the left and right direction are set to the left and right rotations. The laundry according to any one of claims 1 to 3, wherein a number constitutes a reverse periodic pattern opposite to the periodic pattern, and a combination of the periodic pattern and the reverse periodic pattern is alternately executed. Machine. A cloth amount detecting means for determining the amount of laundry put into the washing and dewatering tank is provided, and at least one of the on / off time and the rotation speed is set differently according to the determination result of the cloth amount detecting means. The washing machine according to any one of claims 1 to 4, wherein the washing machine is configured as described above. The shape of the rotor blades is that a substantially pan-shaped base having an inclined surface on the outer peripheral portion is provided with a protruding protrusion for stirring radially, and the protruding protrusion for stirring has a substantially trapezoidal shape with a cross section on both sides. The washing machine according to any one of claims 1 to 5, characterized in that The control means executes at least one stirring process in which the rotational speed in the left-right direction is set differently and the stirring process in which the rotational speed in the left-right direction is set to the same rotational speed. The washing machine according to any one of claims. The control means executes a combination of an agitation process in which the rotational speed in the left-right direction is set differently, an agitation process in which the rotational speed in the left-right direction is set to the same rotational speed, and a tank rotation process in which the washing and dewatering tub is rotated. The washing machine according to any one of claims 1 to 7, characterized in that