JP2005192830A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a washing machine which reduces entanglement of laundry during washing, provides sufficient washing power, enables the laundry to easily be taken out therefrom, and performs spin dry with little abnormal vibration. <P>SOLUTION: A stirring plate 20 having prescribed inclination 20a is provided at a stirring blade 15. The rotation of the stirring blade 15 generates vertical water flow in a washing solution in a washing and spin-drying tub 14. Thus, the laundry is moved mainly vertically to prevent entanglement. In addition, acceleration of the rotation of the stirring blade 15 generates the intense vertical water flow of the washing solution 22, thereby the washing power is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a washing machine that performs washing by forward and reverse rotation of a stirring blade disposed at the inner bottom of a tank and performs dehydration by rotation of the tank.

  Conventionally, in this type of washing machine, a tub is used for both washing and dehydration, washing is performed by forward and reverse rotation of an agitator disposed on the inner bottom of the tub, and dehydration is performed by rotation of the tub. The agitation bodies are formed asymmetrically to make the washing water flow complicated, improve the cleaning power, and reduce the tangling of clothing (for example, see Patent Document 1).

FIG. 22 shows a stirring body of a conventional washing machine described in Patent Document 1. As shown in FIG. 22, a stirring body 2 that is disposed at the inner bottom of the tub and rotates forward and backward is used to project a circular base 3 and a radial straight line on the base 3 on the center side. The mechanical force and the hydrodynamic force exerted by the blades 4 can be increased by applying the mechanical force and the hydrodynamic force exerted by the blades 4 to the outer peripheral side. The difference between rolling and reversing makes the movement of laundry and water complex and active. Further, it is more effective to form the same number of convex portions 5 at the same pitch as the blades 4 of the stirrer 2 on the bottom cover 1 outside the periphery of the stirrer 2 to change the movement of the laundry and the water flow upward. I can do it.
JP-A-8-19683

  However, in the conventional configuration, even if the mechanical force and the water flow force exerted by the blades are different between the normal rotation and the reverse rotation of the stirring body, the generated water flow is spiral and the clothes are entangled with each other as washing continues. Therefore, it is difficult to take out, and at the time of dehydration, it becomes an unbalanced load of the tank rotation and has a problem of generating a lot of abnormal vibration.

  The present invention solves the above-mentioned conventional problems, and provides a washing machine capable of obtaining sufficient cleaning power, facilitating the removal of laundry, and reducing the occurrence of abnormal vibration during dehydration. The purpose is to do.

  In order to solve the above-described conventional problems, the washing machine of the present invention is provided with a stirring plate having a predetermined inclination angle on the stirring blade, and generates a vertical water flow in the washing liquid in the washing and dewatering tank by the rotation of the stirring blade. To be washed.

  As a result, the laundry is mainly moved up and down so that it does not get entangled. Also, by increasing the rotation speed of the stirring blade, the up and down water flow of the washing liquid can be made intense, so that the cleaning power is not reduced.

  The washing machine of the present invention can obtain a sufficient detergency, can easily take out the laundry, and can also reduce the occurrence of abnormal vibration during dehydration.

  A first invention is a washing and dewatering tub that is rotatably provided in an outer tub, a stirring blade that is provided at the bottom of the washing and dewatering tub, and a drive that rotates the washing and dewatering tub and the stirring wing. And a stirring plate having a predetermined inclination angle is provided on the stirring blade, so that the washing water in the washing and dewatering tank is generated and washed by rotation of the stirring blade, Therefore, the laundry is mainly moved up and down so that it does not get entangled, and the washing water is not lowered because the up and down water flow of the washing liquid can be made intense by increasing the rotation speed of the stirring blade.

  In the second invention, in particular, the stirring plate of the first invention is configured to extend from one arc portion of the stirring blade toward the arc portion on the opposite side, so that the stirring plate easily picks up laundry, It is possible to prevent the laundry from being caught on the stirring plate.

  In the third invention, in particular, the length of one arc part of the second invention is made longer than the length of the arc part on the opposite side, thereby making it possible to make a difference in the space formed by the stirring blade and the stirring plate. As a result, a water flow is generated, and the washing performance can be improved.

  The fourth aspect of the invention is particularly generated by one rotation of the stirring blade by providing a plurality of stirring plates on the stirring blade of the first invention and inclining the stirring plate so as to become lower toward the rotation axis direction. This increases the vertical movement of the washing liquid, increasing the number of times the washing liquid acts on the laundry and improving the washing performance.

  The fifth invention, in particular, by providing a stirring blade protruding upward between the stirring plates of the fourth invention, the laundry contacts the stirring blade and moves to the side wall of the washing and dewatering tub by centrifugal force, The laundry that was above the washing / dehydrating tub is drawn into the lower part of the washing / dehydrating tub, and the laundry is switched up and down, so that uneven washing can be prevented.

  In the sixth aspect of the invention, in particular, the plurality of stirring plates according to the fourth or fifth aspect are set at different inclination angles, thereby changing the washing water flow caused by the rotation of the stirring blades and washing performance. Can be improved. Moreover, the regularity of the vortex generated slightly by the rotation of the stirring blade can be eliminated, and the tangling of the laundry can be prevented.

  In the seventh aspect of the invention, in particular, by forming a convex portion on the stirring plate of any one of the fourth to sixth aspects of the invention, rotational movement is added to the laundry in addition to vertical movement, improving washing performance. can do.

  In the eighth aspect of the invention, in particular, since the convex portion of the seventh aspect is constituted by a rotating body, the laundry that contacts the convex portion is not subjected to excessive mechanical force from the convex portion, and the laundry is damaged. Can be prevented.

  In the ninth aspect of the invention, in particular, the rotating body of the eighth invention is configured to be fixed at the time of washing, so that an appropriate mechanical force is obtained when the laundry floats in the washing liquid and the contact force with the rotating body is weak. It will be added to the laundry, and the detergency of the cleaning power can be prevented.

  In the tenth aspect of the invention, in particular, the rotating body of the eighth or ninth aspect of the invention is configured to switch between rotation and fixation according to the rotation speed of the stirring blade, so that the upstream and downstream of the washing liquid is generated and the laundry is Up-and-down switching is performed at high and low rotation speeds of the stirring blades, so that inexpensive and efficient cleaning can be performed.

  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 sectional view of a washing machine according to the first embodiment of the present invention. FIG. 2 shows a perspective view of the stirring blade of the washing machine.

  In FIG. 1 and FIG. 2, the washing machine outer frame 11 suspends the outer tub 13 by four suspension bars 12. A stirring blade 15 is rotatably disposed at the inner bottom of the washing / dehydrating tank 14. The motor 16 (driving means) is composed of a brushless DC motor and is controlled by an inverter so that the rotation speed can be freely changed. Then, the stirring blade 15 and the washing and dewatering tub 14 are driven via the speed reduction mechanism 17. The washing water supply means 18 supplies water into the washing and dewatering tub 14. The drainage means 19 drains the washing liquid 22 in the outer tub 13. On the upper surface of the stirring blade 15, a stirring plate 20 having a predetermined inclination angle 20a is placed. The stirring blade 15 and the stirring plate 20 are provided with a plurality of through holes 21 so that the washing liquid can pass therethrough.

  About the washing machine comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, the laundry 23 and the detergent are put into the washing / dehydrating tank 14 and the operation is started. Washing water is supplied from the washing water supply means 18 into the washing and dewatering tub 14. Further, the washing and dewatering tub 14 is rotated at a low speed by the driving means 16 via the speed reduction mechanism 17. By this rotation, the detergent and the washing water are mixed to become the washing liquid 22. When the specified water level is reached, the washing water supply means 18 stops water supply. The rotation of the washing and dewatering tank 14 is stopped, the speed reduction mechanism 17 is switched, and the stirring blade 15 starts to rotate. The stirring blade 15 repeats forward and reverse.

  As the stirring blade 15 rotates on the upper surface 20 b of the stirring plate 20 placed on the stirring blade 15, a difference in height occurs, and an upper and lower water flow is generated in the washing liquid 22. The upper and lower water flows of the washing liquid 22 act on the laundry 23, and dirt is taken into the washing liquid 22 and the washing proceeds. When the forward reversal speed of the stirring blade 15 is increased, the cycle of the upper and lower water flows of the washing liquid 22 is also increased, and the force acting on the laundry 23 is increased, so that the cleaning power can be increased. Ultimately, it is like washing with high frequency washing liquid like an ultrasonic cleaner. The movement of the laundry 23 is mainly up and down, and the laundry 23 is not entangled.

  As described above, in the present embodiment, the stirring plate 20 having the predetermined inclination angle 20a is provided on the stirring blade 15, and the up and down water flows to the washing liquid 22 in the washing and dewatering tub 14 by the rotation of the stirring blade 15. Since it is generated and washed, the laundry 23 is mainly moved up and down so that it is not entangled, easy to take out, and is not biased, so that vibration during dehydration can be reduced. Further, by increasing the rotation speed of the stirring blade 15, the washing water 22 can be made stronger and the washing power can be improved.

  Although the present embodiment has been described for washing, there is also an effect of improving the drying performance by moving the laundry up and down to improve the contact between the dry air and the laundry without tangling.

(Embodiment 2)
FIG. 3 is a plan view of a stirring blade of a washing machine according to the second embodiment of the present invention, and FIG. 4 is a cross-sectional view of the stirring blade. 3 and 4, the stirring plate 20 is configured to extend from one arc portion 15a of the stirring blade 15 toward the opposite arc portion 15b. As a result, the laundry comes into contact with the entire stirring plate 20, and the stirring plate 20 can easily scoop up the laundry, and the laundry can be prevented from being caught on the stirring plate 20.

(Embodiment 3)
FIG. 5 is a plan view of a stirring blade of a washing machine according to the third embodiment of the present invention, and FIG. 6 is a cross-sectional view of the stirring blade. 5 and 6, the length of one arcuate portion 20c of the stirring plate 20 is longer than the length of the arc portion 20d on the opposite side, so that the concave space 24 formed by the stirring blade 15 and the stirring plate 20 is formed. A complicated water flow is generated on both sides, and the washing performance can be improved.

(Embodiment 4)
FIG. 7 is a plan view of a stirring blade of a washing machine according to the fourth embodiment of the present invention, and FIG. 8 is a cross-sectional view of the stirring blade. 7 and 8, two stirring plates 25 and 26 are provided on the stirring blade 15, and the stirring plate 20 is inclined so as to be lowered toward the rotation shaft 27, whereby one rotation of the stirring blade 15 is performed. Thus, the vertical movement of the washing liquid generated in step 2 is doubled, and the number of times the washing liquid acts on the laundry is increased, so that the washing performance can be improved.

(Embodiment 5)
FIG. 9 is a plan view of a stirring blade of a washing machine according to the fifth embodiment of the present invention, and FIG. 10 is a cross-sectional view of the stirring blade. 9 and 10, by providing the stirring blade 28 protruding upward between the stirring plates 20, the laundry contacts the stirring blade 28 and moves to the side wall of the washing and dewatering tub 14 by centrifugal force. The laundry that is above the washing / dehydrating tub 14 is drawn into the lower part of the washing / dehydrating tub 14, and the laundry is switched up and down, so that uneven washing can be prevented.

(Embodiment 6)
FIG. 11 is a plan view of a stirring blade of a washing machine according to the sixth embodiment of the present invention, and FIG. 12 is a cross-sectional view of the stirring blade. In FIGS. 11 and 12, by setting different inclination angles 25a and 26a for the two stirring plates 25 and 26, respectively, the water flow of the washing liquid generated by the rotation of the stirring blade 15 is changed, and the washing performance is improved. Can be improved. Further, the regularity of the vortex generated by the rotation of the stirring blade 15 is eliminated, and the tangling of the laundry can be prevented.

(Embodiment 7)
FIG. 13 is a plan view of a stirring blade of a washing machine according to the seventh embodiment of the present invention, and FIG. 14 is a cross-sectional view of the stirring blade. In FIG. 13 and FIG. 14, by forming the convex portion 29 on the stirring plate 20, the laundry on the stirring plates 25 and 26 is caught by the convex portion 29, and the washing and unloading is performed in synchronization with the rotation of the stirring blade 15. The inside of the water tub 14 is rotated, and a rotational motion is added to the laundry in addition to the vertical motion, so that the washing performance can be improved.

(Embodiment 8)
FIG. 15 is a perspective view of a stirring blade of a washing machine according to an eighth embodiment of the present invention, and FIG. 16 is a perspective view of a mounting portion for the rotating body and the stirring plate. 15 and 16, the rotating body 30 includes a cylindrical main body 30a and a shaft 30b. The shaft 30b is mounted on a bearing 31 provided on the stirring plates 25 and 26, and is rotatably supported by a shaft stop 31a. . As a result, the laundry in contact with the rotating body 30 tries to be caught by the rotating body 30, but cannot be caught because the rotating body 30 rotates, and as a result, excessive mechanical force can be applied from the rotating body 30. It is possible to prevent the laundry from being damaged.

(Embodiment 9)
FIG. 17 is a cross-sectional view of a stirring blade of a washing machine according to the ninth embodiment of the present invention, and FIG. 17 and 18, the rotating body 30 includes a cylindrical and hollow main body 30a and a shaft 30b. The shaft 30b is mounted on a bearing 31 provided on the stirring plates 25 and 26, and is rotatably fixed by a shaft stopper 31a. Is done. Further, a prismatic fixing portion 30c is provided at the attachment portion of the main body 30a and the shaft 30b. At the time of washing, the rotating body 30 is submerged in the washing liquid and moves upward by buoyancy. At this time, the corners of the fixing portion 30c are fitted into the bearings 31 that are also formed into a square shape, and the rotation of the rotating body 30 is restricted.

  When there is no washing liquid, the rotating body 30 moves downward due to its own weight, and the shaft 30b is accommodated in the shaft stopper 31a having a semicircular cross section so that the rotating body 30 can rotate. As a result, when the laundry comes into contact with a strong force exceeding the buoyancy of the rotating body 30, the rotating body rotates. When the laundry comes into contact with a force smaller than that, the rotation of the rotating body 30 stops. Appropriate mechanical force is applied to the object, and both damage and a decrease in cleaning power can be prevented.

(Embodiment 10)
FIG. 19 is a perspective view of a stirring blade of a washing machine according to the tenth embodiment of the present invention, and FIGS. 20 and 21 are sectional views of the stirring blade. 19 to 21, the rotating body 30 includes a cylindrical main body 30a and a shaft 30b. The shaft 30b is mounted on a bearing 31 provided on the stirring plates 25 and 26, and is rotatably fixed by a shaft stopper 31a. . A prismatic fixing portion 30c is provided at the attachment portion of the main body 30a and the shaft 30b on the outer peripheral side of the stirring blade 15. A rectangular recess 31b is formed on the bearing 31 on the outer peripheral side of the stirring blade 15, and a compression spring 32 is attached thereto.

  When the rotating speed of the stirring blade 15 is low, the rotating body 30 moves to the rotating shaft 27 side by the force of the compression spring 32, and the rectangular concave portion 31b and the fixed portion 30c on the outer peripheral side of the stirring blade 15 are disengaged. The rotating body 30 can rotate. When the rotational speed of the stirring blade 15 is increased and the centrifugal force acting on the rotating body 30 becomes larger than the force of the compression spring 32, the rotating body 30 moves to the outer peripheral side of the stirring blade 15, and the fixed portion 30c and the recessed portion 31b. And the rotation of the rotating body 30 is restricted.

  When the rotating speed of the stirring blade 15 is low, the rotating body 30 rotates and is washed only in the upstream and downstream of the washing liquid. When the rotating speed of the stirring blade 15 is high, the rotation of the rotating body 30 is stopped and the washing is performed. Mechanical power is applied to the object, and the cleaning power can be strengthened and the laundry can be swapped up and down. As a result, the upstream and downstream of the washing liquid and the top and bottom of the laundry are exchanged at high and low rotation speeds of the stirring blades, so that inexpensive and efficient cleaning can be performed.

  As described above, the washing machine according to the present invention prevents the tangling of the laundry by actively washing the laundry so that it can be applied not only to washing but also to drying.

Sectional drawing of the washing machine in Embodiment 1 of this invention Perspective view of stirring blade of the washing machine Plan view of a stirring blade of a washing machine in Embodiment 2 of the present invention Cross-sectional view of the washing blade of the washing machine Plan view of a stirring blade of a washing machine in Embodiment 3 of the present invention Cross-sectional view of the washing blade of the washing machine Top view of stirring blade of washing machine in embodiment 4 of the present invention Cross-sectional view of the washing blade of the washing machine Plan view of stirring blade of washing machine in embodiment 5 of the present invention Cross-sectional view of the washing blade of the washing machine Plan view of stirring blade of washing machine in embodiment 6 of the present invention Cross-sectional view of the washing blade of the washing machine Plan view of a stirring blade of a washing machine in Embodiment 7 of the present invention Cross-sectional view of the washing blade of the washing machine The perspective view of the stirring blade of the washing machine in Embodiment 8 of this invention The perspective view of the mounting part of the rotating body and stirring plate of the washing machine Sectional drawing of the stirring blade of the washing machine in Embodiment 9 of this invention Sectional view of the rotating machine and the mounting part of the stirring plate of the washing machine The perspective view of the stirring blade of the washing machine in Embodiment 10 of this invention Cross-sectional view of the washing blade of the washing machine Cross-sectional view of the washing blade of the washing machine Top view of conventional washing machine stirring blades

Explanation of symbols

DESCRIPTION OF SYMBOLS 13 Outer tub 14 Washing and dewatering tank 15 Stirring blade 15a Arc part 15b Arc part 16 Driving means 20 Stirring plate 20a Inclination angle 20c Arc part 20d Arc part 25 Stirring plate 25a Inclination angle 26 Stirring board 26a Inclination angle 27 Rotating shaft 28 Stirring blade 28 29 Convex part 30 Rotating body

Claims (10)

A washing / dehydrating tub rotatably provided in the outer tub, a stirring blade provided at the bottom of the washing / dehydrating tub, and a driving means for rotating the washing / dehydrating tub and the stirring wing, A washing machine having a stirring blade provided with a stirring plate having a predetermined inclination angle. The washing machine according to claim 1, wherein the stirring plate is configured to extend from one arc portion of the stirring blade toward an arc portion on the opposite side. The washing machine according to claim 2, wherein the length of one arc portion is longer than the length of the arc portion on the opposite side. The washing machine according to claim 1, wherein a plurality of stirring plates are provided on the stirring blade, and the stirring plates are inclined so as to become lower toward the rotation axis direction. The washing machine according to claim 4, wherein stirring blades protruding upward are provided between the stirring plates. The washing machine according to claim 4 or 5, wherein the plurality of stirring plates are set at different inclination angles. The washing machine according to any one of claims 4 to 6, wherein a convex portion is formed on the stirring plate. The washing machine according to claim 7, wherein the convex portion is constituted by a rotating body. The washing machine according to claim 8, wherein the rotating body is fixed during washing. The washing machine according to claim 8 or 9, wherein the rotating body is configured to switch between rotation and fixation in accordance with a rotation speed of the stirring blade.

Images