JP2017192409A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a washing machine that ensures a washing power while suppressing a damage on cloth or a cloth entanglement of laundry (especially, clothing of a delicate material, clothing easily losing a shape, fashionable clothing).SOLUTION: The washing machine includes a washing tub, an impeller blade provided on a bottom of the washing tub, a driving device for rotary driving the washing tub and the impeller blade, and water supply means for supplying water into the washing tub. The washing machine has a first washing course that is a standard course and a second washing course that is different from the first washing course. When the first washing course is selected, washing is performed by rotating the impeller blade in a state where water has been supplied into the washing tub at a first set level of water by the water supply means. When the second washing course is selected, washing is performed by rotating the impeller blade in a state where water has been supplied into the washing tub at a second set level of water that is higher than the first set level of water by the water supply means.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a washing machine.

  Patent Document 1 describes that “It is aimed to realize a washing machine that can perform both fashionable clothes washing and normal washing with very little fabric damage, shrinkage, shape loss, entanglement, etc.”.

JP-A-8-191982

  When washing with a conventional washing machine with the washing tub fixed and rotating the pulsator, between the pulsator and the washing tub There is a problem in that rubbing occurs and fabric damage, fabric entanglement, shrinkage, shape loss, and the like become extremely large.

  When washing is performed by rotating the washing tub, which is another means of washing, at low speed, the clothes and washing liquid rotate according to the rotation of the washing tub. There are challenges. Also, for example, in woolen clothing, the laundry may float on the surface of the water, so there is a possibility that the washing liquid will not permeate the clothing sufficiently. It is considered desirable to wash.

  Therefore, the present invention solves the above-described conventional problems, and is capable of cleaning while preventing fabric damage or entanglement of laundry (especially delicate material clothing, easily deformed clothing, fashionable clothing, etc.). It aims at providing the washing machine which secured.

  The present invention includes, as an example, a washing tub, a stirring blade provided at the bottom of the washing tub, a driving device that rotationally drives the washing tub and the stirring wing, and a water supply unit that supplies water to the washing tub. In the washing machine provided, the first washing course as a standard course and a second washing course that is different from the first washing course, and when the first washing course is selected, the water supply In the state where the washing tub is supplied to the first set water level by the means, the agitating blade is rotated to perform washing, and when the second washing course is selected, the water supply means supplies the washing tub to the washing tub. Washing is performed by rotating the stirring blade in a state where water is supplied to a second set water level higher than the first set water level.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine which ensured the detergency while suppressing the cloth damage, fabric entanglement, etc. of the laundry (especially the clothing of delicate material, the clothing which is easy to lose shape, the fashionable clothing, etc.) can be provided.

It is the schematic which shows the internal structure of the washing machine of this embodiment. It is a longitudinal cross-sectional view which shows the internal structure of the washing tub which concerns on this embodiment. It is sectional drawing which shows the inside of the washing tub from which the stirring blade was removed. It is a perspective view which shows the back side of a stirring blade. It is sectional drawing which shows the positional relationship of the inlet_port | entrance of a circulation water channel, and a radial direction rib. It is a perspective view which shows the back side of the stirring blade as a comparative example. The flow of the water by the circumferential direction rib is shown, (a) is this embodiment, (b) is a comparative example. The image figure of shower diffusion is shown, (a) is this embodiment, (b) is a comparative example. It is the schematic which shows an operation panel. It is a flowchart which shows process operation | movement of the washing | cleaning system which concerns on a standard course. It is a flowchart which shows process operation | movement of the washing | cleaning system which concerns on a dry course. It is a flowchart which shows process operation | movement of the washing | cleaning system which concerns on a delicate course. It is the figure which compared the rotation speed of the stirring blade in main washing in a standard course, a dry course, and a delicate course. It is the figure which compared the change of the water level in the washing tub in the main washing in the standard course, the dry course, and the delicate course. It is a figure which shows the relationship between the stirring blade 3, a motion, and the motion of clothing.

  Hereinafter, modes for carrying out the present invention (hereinafter referred to as “embodiments”) will be described in detail with reference to the drawings as appropriate. In the following, a washing machine (so-called fully automatic washing machine) that can perform washing, rinsing, and dehydrating will be described as an example. However, a washing machine that can perform washing, rinsing, dehydrating and drying (so-called washing machine) The present invention can also be applied to a vertical washer / dryer.

  FIG. 1 is a schematic view showing the internal configuration of the washing machine of the present embodiment.

  As shown in FIG. 1, a washing machine 1 circulates a washing tub 2, a stirring blade 3 provided at the bottom of the washing tub 2, and washing water in an outer frame (housing) 5 made of a substantially box-shaped steel plate. And a circulating water channel R.

  The washing tub 2 has a bottomed cylindrical shape, and includes a body plate 21, a bottom plate 22 provided on the bottom of the body plate 21, a balance ring 23 provided on the top of the body plate 21, and the like.

  The stirring blade 3 (also referred to as a pulsating blade or a pulsator) is formed in a substantially disk shape and is provided at the bottom of the washing tub 2. The stirring blade 3 is rotatably supported by the driving device 6. Accordingly, the washing water can be stirred together with the laundry 12 by rotating the stirring blade 3 at the time of washing or rinsing.

  The circulation channel R is provided on the wall surface of the washing tub 2, and the washing water (water) is pushed up from the bottom of the washing tub 2 to the top of the washing tub 2 by the rotation of the stirring blade 3, and returned to the inside of the washing tub 2. It is configured to circulate. Circulating water channels R are provided at a plurality of locations on the wall surface of the washing tub 2.

  The washing machine 1 also includes an outer tub 7 that coaxially encloses the washing tub 2 in the frame of the outer frame 5. The outer tub 7 is made of a synthetic resin and is formed in a bottomed cylindrical shape, and is supported in a suspended and antivibration manner by a coil spring that is suspended and supported from the upper end of the outer frame 5 or a vibration isolator 8 that is made of elastic rubber. Further, a drain valve 13 and a drain hose 11 are provided outside the bottom of the outer tub 7, and are connected to the drain hose 11 via a drain port 7 a and a drain valve 13 provided at the bottom of the outer tub 7.

  The washing machine 1 also includes a control unit 19 that is a control means, an electromagnetic water supply valve 16 that is a water supply means, a pressure-sensitive water level sensor 15 that detects the water level, and the like. When performing the washing process or the like, the electromagnetic water supply valve 16 is opened by the command of the control unit 19, and the washing water is supplied into the outer tub 7. When the water level sensor 15 detects that the water level has reached a predetermined level, the electromagnetic water supply valve 16 is closed by a command from the control unit 19 to stop water supply. Moreover, when performing a dehydration process etc., the drain valve 13 is opened by the instruction | command of the control unit 19, and the wash water in the outer tub 7 is discharged | emitted from the other end of the drain hose 11 out of the washing machine 1.

  An upper cover 9 made of synthetic resin is provided on the upper part of the outer frame 5, and a base member 10 made of synthetic resin is provided on the lower part of the outer frame 5. A central portion of the top cover 9 has a laundry input port 9a for taking in and out the laundry 12 and the like, and a lid 9b for opening and closing the laundry input port 9a. Further, a water supply hose connection port 17 connected to a water tap is provided at the rear portion of the top cover 9. The water supply hose connection port 17 is connected to the electromagnetic water supply valve 16.

  In addition, there is a gap between the inner circumference of the outer tub 7 and the outer circumference of the washing tub 2, and the upper end of the outer tub 7 is kept in order to prevent the laundry from entering the gap and to maintain the rigidity of the entire outer tub 7. Is provided with a tank cover 18 that covers the upper surface of the balance ring 23.

  The drive device 6 is attached to the outside of the bottom of the outer tub 7 via a steel plate attachment base 14. The drive device 6 is configured to drive the stirring blade 3 via a drive motor and a speed reduction mechanism. The driving device 6 is configured to rotate the stirring blade 3 in both forward and reverse directions while the washing tub 2 is stationary or fixed, and a dehydration mode in which the washing tub 2 and the stirring blade 3 are integrally rotated in the same direction. Can be selectively driven.

  Further, the driving device 6 is neutral in which the agitating blade 3 is rotated in both forward and reverse directions in a state where the washing tub 2 is not stationary (the rotation of the washing tub 2 is not fixed but the washing tub 2 cannot be directly rotated by the driving device 6). The mode can also be selectively driven.

  FIG. 2 is a longitudinal sectional view showing the internal configuration of the washing tub according to the present embodiment. In FIG. 2, the dehydration hole 21a (see FIG. 1) is not shown.

  As shown in FIG. 2, the body plate 21 is a stainless steel plate formed in a cylindrical shape, and the washing water contained in the laundry 12 on the peripheral wall is separated from the laundry 12 by centrifugal force and discharged. A plurality of dewatering holes 21a (see FIG. 1, only part of which are shown) are formed.

  The body plate 21 is attached with a circulation channel member 24 that constitutes the circulation channel R. The circulation flow path member 24 is formed of a substantially plate-shaped member such as a synthetic resin, and is configured to extend in the vertical direction with a predetermined width.

  Further, a circulation channel member 25 that constitutes the circulation channel R is attached to the body plate 21 at a position different from the circulation channel member 24. A detachable lint collecting member 26 is attached to the circulation channel member 25. The lint collecting member 26 has a plurality of openings 26a, and a lint filter (not shown) is provided in a region where the openings 26a are disposed.

  The bottom plate 22 is made of a synthetic resin and is a dish-shaped member that closes the lower portion of the body plate 21, and includes a bottom portion 22a that forms the bottom surface of the washing tub 2, and a side that extends upward from the outer peripheral edge of the bottom portion 22a and forms a side surface. Part 22b, and is fixed to the lower end of the body plate 21. In addition, a plurality of through holes 22c communicating with the bottom of the outer tub 7 are formed in the bottom portion 22a.

  The balance ring 23 is formed in a ring shape with synthetic resin or the like, and is fixed to the upper end portion (upper edge portion) of the body plate 21. The balance ring 23 is disposed so as to protrude radially inward from the inner wall surface of the trunk plate 21, and the inner diameter of the balance ring 23 is configured to be smaller than the inner diameter of the trunk plate 21. Further, the balance ring 23 is configured by enclosing a fluid having a large specific gravity (such as salt water) therein, and cancels the eccentricity due to the movement of the fluid when the eccentricity occurs due to the unevenness of the laundry when the washing tub 2 rotates. , Has the function of maintaining the balance of rotation.

  The stirring blade 3 has a substantially disk shape having a diameter covering the inside of the bottom plate 22 (inner bottom portion of the washing tub 2), and the center portion rises upward in the rotation axis direction and undulates vertically along the circumferential direction. It is configured. Further, the stirring blade 3 is formed to be curved so that a part of the peripheral edge is pushed upward. Further, the stirring blade 3 is formed with a plurality of holes 3a penetrating the front surface side and the back surface side, and a circular dimple portion 3b and a radially extending ridge portion 3c are formed at a plurality of locations.

  FIG. 3 is a cross-sectional view showing the inside of the washing tub with the stirring blades removed. FIG. 3 is a cross-sectional view of the waste thread collecting member 26 as viewed from the front.

  As shown in FIG. 3, the circulation channel member 24 has an upper end 24 a extending to the vicinity of the balance ring 23, and a lower end 24 b extending to a position where it enters the recess of the bottom plate 22. Further, at the upper end 24 a of the circulation flow path member 24, a flange portion 24 a 1 is formed that is integrally bent with resin on the radially inner side. The tip of the collar portion 24 a 1 is set at a position that does not protrude radially inward from the balance ring 23. Further, at the lower end 24b of the circulation flow path member 24, a flange portion 24b1 that is integrally bent with resin and fits with the bottom plate 22 is formed to protrude radially inward.

  Further, a water conduit 24 c formed integrally with resin is formed on the back surface of the circulation channel member 24, and a circulation channel R is formed between the circulation channel member 24 and the inner wall surface 21 b of the trunk plate 21. Yes. That is, a pair of ribs (not shown) spaced apart in the left-right direction (circumferential direction) are formed on the back surface of the circulation channel member 24 so as to protrude toward the body plate 21, and the circulation channel member A fixing portion (not shown) for fixing 24 to the body plate 21 is provided. A packing (not shown) is attached to the rib so as to be in close contact with the inner wall surface of the circulation flow path member 24, and the circulation flow path member 24 is fixed to the body plate 21 through a fixing portion, thereby flowing from the inlet 27. The washing water can flow up to the upper end of the circulation flow path member 24 without leaking in the middle.

  Further, a water conduit (not shown) formed integrally with a resin is formed on the back surface of the circulation channel member 25 provided with the lint collecting member 26, and the inside of the circulation channel member 25 and the body plate 21 is formed. A circulation channel (not shown) is formed between the wall surface (not shown). The circulation channel member 25 of the present embodiment does not have the circulation channel R formed up to the upper end of the washing water, and sprays the washing water into the washing tub 2 from the opening 26a of the waste thread collecting member 26. It is to be circulated. In addition, it is not limited to the circulation flow path member 25 of such a structure, The slit-shaped discharge port which discharges washing water was provided above the waste thread collection member 26 of the circulation flow path member 25. It may be a thing.

  An inlet (introduction port) 27 for introducing the washing water into the circulation water channel R is provided at the bottom of the washing tub 2 positioned below the circulation channel member 24 in the vertical direction. The bottom plate 22 provided with the inlet 27 is formed to be curved so as to have an R shape from the bottom 22a to the side 22b. Thereby, the direction of the flow of the washing water can be smoothly changed to the circulation water channel R extending in the vertical direction. Further, the height dimension H of the inlet 27 is a length until a straight line drawn downward in the vertical direction from the lower surface of the flange portion 24b1 contacts the bottom plate 22. The height position Hm (see FIG. 5) of the inlet 27 is the height of the lower surface of the collar portion 24b1, in other words, the height of the upper end of the inlet 27.

  In addition, a discharge port 31 is formed at the upper end of the circulating water channel R so as to open upward in the vertical direction. The discharge port 31 is disposed so as to face the lower surface 23 a of the balance ring 23. Thus, the washing water discharged from the discharge port 31 collides with the lower surface 23a of the balance ring 23, so that the washing water is directed into the washing tub 2 from the gap 32 formed between the collar portion 24a1 and the lower surface 23a. Are discharged (sprinkled).

  In addition, an inlet (inlet port) 28 (see FIG. 3) for introducing the washing water into the circulation channel is formed at the bottom of the washing tub 2 positioned below the circulation channel member 25 in the vertical direction. Yes. The washing water introduced from the inlet 28 passes through a water conduit (not shown) formed between the circulation flow path member 25 and the body plate 21 and is introduced into the waste thread collecting member 26 so that the waste thread is removed. After being collected, water is sprayed into the washing tub 2 from the opening 26a.

  FIG. 4 is a perspective view showing the back side of the stirring blade.

  As shown in FIG. 4, a plurality of back blades 33 (radial ribs) extending in the radial direction D from the rotation axis center O are formed on the back surface (lower surface) of the stirring blade 3. In other words, the back blades 33 are formed radially from the rotation axis center O. The back blade 33 has a plate shape and is formed so as to protrude downward in the vertical direction (upward in FIG. 4) from the back surface of the stirring blade 3. Further, the back blade 33 is configured to be arranged at a substantially equal angle in the circumferential direction W.

  In the present embodiment, back blade groups 33A and 33A are formed on the back surfaces of the two regions raised above the stirring blade 3 (see FIG. 2). Thereby, a large amount of water taken in between the back blades 33 can be secured. Each back blade group 33A is composed of five back blades 33, and is arranged in an angle range of about 90 degrees. The back blade group 33A has not only a function of taking in the washing water to be circulated, but also a function as a reinforcing member for suppressing the laundry 12 from being poured into the washing tub 2 and bending and deforming the stirring blade 3.

  Back blade groups 33B and 33B are formed in a region between the back blade group 33A and the back blade group 33A. The back blade group 33B is formed on the back surface of two regions recessed below the stirring blade 3 (see FIG. 2). The back blade group 33B is composed of three back blades and is disposed within an angle range of about 90 degrees. The back blade group 33B mainly functions as a reinforcing member that suppresses the stirring blade 3 from being bent and deformed.

  In addition, annular ribs 34, 34, 34 formed concentrically or substantially concentrically around the rotation center axis O are formed on the center side of the back surface of the stirring blade 3 (region of about a half of the radius). ing. Thereby, the stirring blade 3 and the back blade group 33A, 33A, 33B, 33B can be reinforced.

  Further, an outer peripheral rib 35 and inner peripheral ribs 36 and 37 extending in the circumferential direction W are formed on the back surface (lower surface) of the stirring blade 3 at intervals in the radial direction D. Further, the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37 are formed to be curved with substantially the same curvature as that of the stirring blade 3.

  The outer circumferential rib 35 is a circumferential rib located on the outer circumferential side, and extends from the rear blade 33 at one end in the circumferential direction W of the rear blade group 33A to the rear blade 33 at the other end. It is integrally formed. Moreover, the outer peripheral side rib 35 is located in the front end side of each back blade 33 of the back blade group 33A. Note that the front end side of the back blade 33 means an end portion on the outer peripheral side of the back blade 33 or the vicinity of an end portion on the outer peripheral side of the back blade 33.

  The inner peripheral side ribs 36 and 37 are circumferential ribs positioned on the inner peripheral side with respect to the outer peripheral side rib 35, and are configured such that the inner peripheral side rib 36 is positioned on the outer peripheral side with respect to the inner peripheral side rib 37. Yes. Further, the inner peripheral ribs 36 and 37 are formed to be shorter in the vertical direction than the outer peripheral rib 35. Further, the inner circumferential side rib 36 is formed to be longer in the vertical direction than the inner circumferential side rib 37.

  The inner peripheral ribs 36 and 37 are integrally formed with the three back blades 33 at the center of the five back blades 33 of the back blade group 33A.

  FIG. 5 is a cross-sectional view showing the positional relationship between the inlet of the circulating water channel and the radial rib. FIG. 5 shows a cross-sectional view of the back blade group 33A when the center back blade 33 of the five back blades 33 is cut to the front.

  As shown in FIG. 5, the surface of the stirring blade 3 has a slightly raised shape at the center, and has an inclined surface 3d that rises from the position of the annular rib 34 toward the outer peripheral side (radially outward). Yes. In the position shown in FIG. 5, the outer peripheral edge of the stirring blade 3 is located above the upper end 22 d of the bottom plate 22. A drooping portion 3 e extending toward the inlet 27 is formed on the outer peripheral edge of the stirring blade 3. The tip (lower end) of the hanging portion 3e is positioned above the inlet 27 (the collar portion 24b1), and is configured such that a gap S is formed between the surface of the circulation flow path member 24. The dimension of the gap S is set to the minimum distance at which the stirring blade 3 does not contact the circulation channel member 24 during operation.

  The outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37 extend toward the bottom portion 22a of the bottom plate 22 positioned below and are formed in parallel to each other. Moreover, the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37 are located on the outer peripheral side with respect to half the radius of the stirring blade 3 (1/2).

  The front end (lower end) 35a of the outer peripheral side rib 35 is located on the side of the bottom 22a (bottom side) from the height position Hm of the inlet 27 of the circulating water channel R (the lower surface of the flange portion 24b1). In other words, the front end (lower end) 35a of the outer peripheral side rib 35 is located below the upper end portion (height position Hm) of the inlet 27, and the inlet 27 and the outer peripheral side rib 35 are identical when viewed from the radial direction. It is comprised so that it may overlap in a part. Further, the front end (lower end) 35 a of the outer peripheral side rib 35 is located above a height position that is half the height dimension H of the inlet 27. As a result, the amount of washing water that escapes from the gap S can be suppressed, and the flow rate of the washing water introduced into the inlet 27 can be suppressed from decreasing.

  The tips (lower ends) 36a, 37a of the inner peripheral ribs 36, 37 are located on the side farther from the bottom portion 22a than the tips (lower ends) 35a of the outer peripheral rib 35. In other words, the tips (lower ends) 36a, 37a of the inner peripheral ribs 36, 37 are positioned above the tips (lower ends) 35a of the outer peripheral ribs 35. Further, the front end (lower end) 36 a of the inner peripheral side rib 36 is located closer to the bottom 22 a than the front end (lower end) 37 a of the inner peripheral side rib 37.

  A boss 3f connected to the rotation shaft 6a of the drive device 6 (see FIG. 1) is provided at the rotation shaft center O of the stirring blade 3. The boss 3f is formed on the back surface of the stirring blade 3 so as to protrude downward. When the tip (lower end) of the boss 3f is the reference position Hs, the height of the tip 35a of the outer peripheral rib 35 is H1, the height of the tip 36a of the inner rib 36 is H2, and the inner rib When the height dimension of the tip 37a of 37 is H3, the relationship is H1 <H2 <H3.

  Moreover, the length of the vertical direction from the back surface of the stirring blade 3 of the outer peripheral side rib 35 is set longer than the half (1/2) of the length from a back surface to the reference position Hs. Further, the length in the vertical direction from the back surface of the stirring blade 3 of the inner peripheral ribs 36 and 37 is set to be equal to or less than a half (1/2) of the length from the back surface to the reference position Hs.

  In the washing machine 1 provided with such a circulation flow path member 24, a pump formed by the inner peripheral side of the bottom plate 22 (inner bottom portion of the washing tub 2) and the back blade 33 provided on the back surface of the stirring blade 3. A circulation channel R is configured to communicate with the chamber P (see FIG. 1).

  In the washing machine 1 configured as described above, for example, when the laundry 12 is put into the washing tub 2, the power switch is turned on, and the start switch (not shown) is turned on, an electromagnetic water supply is performed according to a command from the control unit 19. The valve 16 is controlled to supply water to a predetermined water level, and the process proceeds to a washing (washing) process. In the washing process, the motor of the driving device 6 is rotated by being controlled by the control unit 19 in the right rotation / pause / left rotation / pause according to the washing water flow. The rotation of the motor of the driving device 6 controlled in this way is transmitted to the stirring blade 3, the stirring blade 3 and the back blade 33 rotate, the laundry 12 and the washing water in the washing tub 2 are stirred, and the laundry 12 Is washed. In addition, the rotational speed of the motor of the drive device 6 is set to 90 to 150 revolutions per minute, for example.

  On the other hand, the washing water on the back side of the stirring blade 3 is pushed outward by centrifugal force by the rotation of the back blade 33 due to the rotation of the stirring blade 3, pushed up in the circulation water channel R, and intermittently upward from the discharge port 31. Discharged. The washing water discharged from the discharge port 31 collides with the lower surface 23 a of the balance ring 23, so that the direction of the washing water is changed to the inside of the washing tub 2 and is poured into the washing tub 2 intermittently. When the washing water is pushed out to the circulation channel R by the back blade 33 of the stirring blade 3, new washing water is then supplied from the through hole 22 c (see FIG. 2) leading to the outer tub 7 provided in the bottom portion 22 a of the bottom plate 22. Is done.

  FIG. 6 is a perspective view showing the back side of a stirring blade as a comparative example. The stirring blade 100 of the comparative example and the stirring blade 3 of the present embodiment differ in the shape of the circumferential rib, and the shape of the surface of the other stirring blades 3, the shape of the back blade 33 and the annular rib 34 are the same. is there. Moreover, in the stirring blade 100, about the structure same as the stirring blade 3, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted.

  As shown in FIG. 6, the stirring blade 100 includes circumferential ribs 101 and 102. The circumferential rib 101 is formed at the same position as the inner circumferential rib 36 of the present embodiment, and the circumferential rib 102 is formed at the same position as the inner circumferential rib 37 of the present embodiment. The circumferential ribs 101 and 102 are formed longer in the vertical direction than the inner circumferential ribs 36 and 37 of the present embodiment. Moreover, the front-end | tips 101a and 102a of the circumferential direction ribs 101 and 102 are comprised so that it may be located in the side closer to the bottom part 22a rather than the front-end | tips 36a and 37a of the inner peripheral side ribs 36 and 37 of this embodiment.

  FIG. 7 shows the flow of water by the circumferential rib, (a) is this embodiment, (b) is a comparative example. In addition, the magnitude of the white arrow indicates the magnitude of the flow rate of the wash water flowing through the circulation water channel R.

  First, the comparative example of FIG. 7B will be described. The circumferential ribs 101 and 102 are located on the inner peripheral side with respect to the tip of the back blade 33. Further, the tip 101a of the circumferential rib 101 is positioned below half (1/2) of the height dimension H of the inlet 27. Further, the distal end 102 a of the circumferential rib 102 is positioned closer to the bottom 22 a than the distal end 101 a of the circumferential rib 101.

  In the comparative example of FIG. 7B, the washing water is held between the adjacent back blades 33, and when the stirring blade 100 rotates in this state, an outward centrifugal force acts on the washing water. At this time, the wash water in the lower part of the space Q10 located between the outermost annular rib 34 and the circumferential rib 102 is, as indicated by the white arrow Y10, the tip 102a and the bottom 22 ( Extruded toward the outer peripheral side through the space between the bottom surface 22a1). Moreover, the flow of the wash water to the outer peripheral side is restricted by the circumferential rib 102 in the wash water located in the upper part of the space Q10.

  Further, the washing water in the lower portion of the space Q11 located between the circumferential rib 101 and the circumferential rib 102 has a tip 101a and a bottom portion 22a (bottom surface 22a1) of the circumferential rib 101 as shown by a white arrow Y11. It is pushed out to the outer periphery side. Moreover, the flow of the wash water to the outer peripheral side is restricted by the circumferential rib 101 in the wash water located in the upper part of the space Q11.

  In addition, the washing water located in the space Q12 located between the circumferential rib 101 and the hanging portion 3e has a part of the washing water, together with the washing water from the spaces Q10 and Q11, as shown by the white arrow Y12. It is pushed toward 27. Further, the remaining washing water is pushed out into the washing tub 2 through the gap S between the stirring blade 100 and the circulation flow path member 24.

  In the stirring blade 100 having such a shape, the flow rate of washing water pushed out to the outer peripheral side by the circumferential ribs 101 and 102 formed at positions where the tips 101a and 102a are close to the bottom surface 22a1 of the bottom plate 22 is reduced. Further, since the space Q12 facing both the gap S and the inlet 27 is formed toward the radially outer side (the side on which the washing water is pushed out by the centrifugal force), the gap S as shown by the white arrow Y13 is formed. The flow rate of the wash water that escapes increases, and the flow rate of the wash water flowing to the inlet 27 decreases as indicated by the white arrow Y14.

  On the other hand, in the present embodiment shown in FIG. 7A, the wash water in the lower portion of the space Q1 located between the outermost annular rib 34 and the inner peripheral rib (circumferential rib) 37 is As indicated by a hollow arrow Y1, the sheet is pushed toward the outer peripheral side through the space between the tip 37a and the bottom 22a. Moreover, the washing water in the upper part of the space Q1 is pushed out to the outer peripheral side as an obliquely downward water flow by the inner peripheral side rib 37 as indicated by the white arrow Y2.

  In addition, the washing water in the lower part of the space Q2 located between the inner peripheral rib (circumferential rib) 36 and the inner peripheral rib (circumferential rib) 37 has a tip 36a as shown by a white arrow Y3. It is pushed to the outer peripheral side through the space between the bottom 22a. Further, as indicated by the white arrow Y4, the washing water in the upper portion of the space Q2 is pushed to the outer peripheral side by the inner peripheral side rib 36 as a water flow obliquely downward.

  Also, the wash water in the lower part of the space Q3 located between the inner peripheral rib (circumferential rib) 36 and the outer peripheral rib (circumferential rib) 35 is directed toward the outer peripheral side as indicated by the white arrow Y5. Pushed out. Further, the washing water in the upper part of the space Q3 is pushed out to the outer peripheral side as an obliquely downward water flow as indicated by a hollow arrow Y6. And the washing water which passed between the front-end | tip 35a and the bottom face 22a1 of the outer peripheral side rib 35 is extruded by the inlet 27 substantially as shown by the white arrow Y7.

  In the washing machine 1 of the present embodiment configured as described above, the tips 36a, 37a of the inner peripheral ribs 36, 37 are formed at positions farther from the bottom surface 22a1 than the tips 35a of the outer peripheral ribs 35. The washing water of Q1 and Q2 can be pushed out to the outer peripheral side, a downward water flow can be generated, and almost all of the washing water in the spaces Q1 and Q2 can be pushed out to the outer space Q3. Thereby, in this embodiment, it becomes possible to increase the amount of circulating water more than before, without reducing the rigidity of the stirring blade 3, and without raising the rotational speed of the stirring blade 3 too much.

  Further, in the present embodiment, the front end 35a of the outer peripheral rib 35 is located below the height position Hm (see FIG. 5) of the inlet 27 (position closer to the bottom surface 22a1 side). Accordingly, the wash water can be guided to the bottom 22a side, and it becomes easy to introduce the wash water beyond the outer peripheral side rib 35 to the outer peripheral side into the inlet 27, and the flow rate of the wash water introduced into the circulation channel R is increased. Can be made. Further, since the tip 35a of the outer peripheral side rib 35 is located below the height position Hm of the inlet 27 (see FIG. 5), the washing water that has passed from the outer peripheral side rib 35 to the outer peripheral side is immediately supplied to the inlet 27. As shown by the white arrow Y8, the flow rate of the washing water escaping from the gap S can be reduced as compared with the case of FIG.

  By the way, in this embodiment, when only the inner peripheral side ribs (circumferential ribs) 36 and 37 are provided without providing the outer peripheral side rib 35, the flow rate of the washing water flowing through the circulation water channel R is shown in FIG. ), The amount of washing water escaping from the gap S also increases. Therefore, in the present embodiment, not only the inner peripheral ribs 36 and 37 are provided as the circumferential ribs, but the outer peripheral ribs 35 are additionally provided, whereby the flow rate of the washing water flowing through the circulation channel R is shown in FIG. It is made to increase rather than the case of b).

  In the present embodiment, the outer peripheral rib 35 is located on the outer peripheral end side (outer peripheral end) of the back blade 33. Thereby, while being able to reduce the quantity which washing water escapes from crevice S, since bending deformation of back blade 33 can be controlled, the rigidity of stirring blade 3 can be raised.

  Moreover, in this embodiment, the front-end | tips 36a and 37a of the inner peripheral side ribs 36 and 37 are located in the side which approaches the bottom part 22a as it goes to an outer peripheral side. As a result, it becomes easier to guide the washing water downward as the washing water moves toward the outer peripheral side, so that it becomes easier to introduce more washing water into the inlet 27.

  FIG. 8 shows an image of shower diffusion, (a) is the present embodiment, and (b) is a comparative example. Note that in both (a) and (b), the balance ring 23 is not shown.

  The washing tub 120 as a comparative example shown in FIG. 8B does not have a discharge port 31 that opens upward at the upper end of the circulation channel member 110 like the circulation channel member 24. An upper plate 110a is provided toward the inside. In the washing tub 120, when the washing water is discharged in the configuration of FIG. 7B, the washing water diffusion angle is limited as indicated by the hatched region U10 in FIG. 8B. Discharged.

  On the other hand, in the washing tub 2 of the present embodiment shown in FIG. 8A, the circulation flow rate of the washing tub 2 flowing through the circulation water channel R is increased by the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37. Thus, as shown by a region U1 indicated by oblique lines in FIG. 8A, the diffusion angle of the washing water discharged from the discharge port 31 of the circulation flow path member 24 can be made larger than that in FIG. 8B. . Thereby, in the washing process or the rinsing process, the washing water can be sprayed over the entire laundry.

  Moreover, in this embodiment, the circulation water channel R is provided with the discharge port 31 which opens upwards, and this discharge port 31 is arrange | positioned facing the lower surface 23a of the balance ring 23 provided in the washing tub 2. As shown in FIG. Accordingly, the upper plate 110a of the circulation channel member 110 in FIG. 8B can be made unnecessary, so that the washing water can be directly applied to the lower surface 23a of the balance ring 23, and the diffusion angle of the washing water can be expanded.

  Moreover, in this embodiment, the collection rate of the foreign material (lint waste) collected by the waste thread collection member 26 can also be improved because the amount of circulating water can be increased.

  In addition, this invention is not limited to above-described embodiment, In the range which does not change the range of this invention, it can change variously. In the above-described embodiment, the case where the four circulation channel members 24 and 25 are provided has been described as an example. However, one, two, three, five or more circulation channel members are provided. There may be.

  Further, in the present embodiment, the case where three circumferential ribs (outer peripheral side rib 35, inner peripheral side ribs 36, 37) are provided is described as an example, but is not limited to three. For example, it may be two circumferential ribs (outer peripheral rib 35, inner peripheral rib) or four or more circumferential ribs (outer peripheral rib 35, three inner peripheral ribs). As long as the rigidity of the stirring blade 3 is not impaired, it can be changed as appropriate.

  In this embodiment, the case where the tip 36a of the inner peripheral rib 36 is positioned below the tip 37a of the inner rib 37 has been described as an example. However, the tips 36a and 37a have the same length. The inner peripheral side ribs 36 and 37 may be sufficient.

  Further, in the present embodiment, the shape of the stirring blade 3 is described as an example in which the shape of the stirring blade 3 undulates along the circumferential direction. However, the shape of the stirring blade 3 is not limited to such a shape, and is along the circumferential direction. The present invention can also be applied to a stirring blade having a certain shape. Also in this case, by providing the outer peripheral side rib 35 and the inner peripheral side ribs 36 and 37, it is possible to obtain the same effect as the above-described embodiment.

  Next, another embodiment of the present invention will be described. FIG. 9 shows a schematic diagram of the operation panel 200 of the present embodiment. The operation panel 200 is roughly divided into a display unit 201 at the top of the operation panel 200 and an operation unit 202 at the bottom.

  The operation unit 202 includes a power button 203 for turning on / off the power, a start switch 204 for starting or pausing operation, a washing course button 205 for setting a washing operation course, and details of the washing operation. A setting button 206 for performing setting. The display unit 201 includes a course display field 207 for displaying a course to be subjected to a washing operation.

  During the washing operation, every time the washing course button 205 is pressed after the power button 203 is pressed, the lighting position of the course display column 207 is switched, and the washing course to be driven (standard course, dry course, delicate course, etc.) is turned on. Pressing the start switch 204 starts the operation of the selected laundry course.

  10 to 12 are flowcharts showing details of the stroke operation of each washing course.

  FIG. 10 shows the stroke operation of the cleaning method according to the standard course. FIG. 11 shows the stroke operation of the cleaning method related to the dry course. FIG. 12 shows the stroke operation of the cleaning system related to the delicate course, which is a feature of this embodiment.

  The control unit 19 is activated when the power button 203 is pressed and the power is turned on, and executes the basic control processing program for washing shown in FIGS. 10 to 12 according to the selected course.

  First, the process operation of the cleaning method according to the standard course of FIG. 10 will be described.

  In step S <b> 301, the control unit 19 performs state confirmation and initial setting of the washing machine 1.

  In step S <b> 302, the control unit 19 sets a washing course according to an input instruction from the washing course button 205. When there is no input instruction, the standard washing course or the previous washing course is automatically set.

  In step S <b> 303, the control unit 19 monitors the input of the start switch signal from the start switch 204. If the control unit 19 determines that there is no input of the start switch signal, it repeats the process of step S303, and if it determines that there is an input of the start switch signal, it proceeds to step S304.

  In step S304, the control unit 19 executes a detergent amount detection process. This detergent amount detection processing is applied to the stirring blade 3 when the laundry before supplying the washing water is in a dry cloth state and the stirring blade 3 is rotated in one direction while the washing tub 2 is stationary. This is done by detecting the amount of laundry on the basis of the rotational load. The control unit 19 obtains an appropriate amount of detergent (detergent amount) based on the detected cloth amount. The detergent amount is determined by referring to a preset table of cloth amount and detergent amount.

  In addition, when the amount of washing water is within a predetermined range (appropriate amount) of the amount of cloth, for example, the amount of washing water (water level h1) is set so that the water level does not exceed the stirring blade 3 and is accumulated at the bottom of the outer tub 7. Set.

  Further, the control unit 19 obtains and sets the washing time based on the detection result (cloth amount). When the amount of cloth is not detected, a standard washing time is set.

  In step S <b> 305, the control unit 19 displays the obtained detergent amount on the display unit 201 of the operation panel 200.

  In step S306, the control unit 19 opens the detergent water supply electromagnetic valve (not shown), and executes the detergent water supply to the detergent charging chamber of the detergent / finishing agent container (not shown). The user operates to close the lid 9b after putting the indicated amount of powder detergent into the detergent charging chamber of the detergent / finishing agent container (not shown) before supplying the detergent. The powder detergent put into the detergent charging chamber in which the detergent water is flowing passes through the detergent / finishing agent container and falls to the bottom of the outer tub 7 together with the detergent water.

  In step S307, the control unit 19 stops the detergent water supply after supplying the detergent to the dissolved water level. In this embodiment, the detergent water supply amount is set to about 10 liters, for example, regardless of the washing amount (cloth amount). This amount of water is sufficient to agitate the water supplied at the bottom of the washing tub 2 and the detergent when the washing tub 2 is rotated in the subsequent detergent dissolution (step S309), and the water surface is agitated. It is set to be lower than the height of the lower surface of the wing 3 (the laundry does not get wet before the detergent is dissolved). When this setting is completed, the detergent water supply is stopped (step S308).

  In step S309, the control unit 19 slowly rotates the washing tub 2 and the stirring blade 3 integrally in one direction (for example, about 70 rotations per minute), so that the outer tub 7 Detergent dissolving is performed by stirring the detergent-dissolved water and the powder detergent supplied to the bottom to produce wash water with a high detergent concentration. The time for dissolving the detergent is set to 1 minute, for example. The dissolution rate is about 90% even under conditions of low temperature (low water temperature) and difficult to dissolve powder detergent. The detergent concentration of the produced wash water is about 7 times the standard concentration. Here, the standard concentration is, for example, a ratio of 20 grams of powder detergent / 30 liters of washing water.

  In step S310, the previous process is executed. The control unit 19 executes cloth amount detection in the same manner as described above, and repeats tap water (fresh water) supply and high-concentration agitation until the set water level is reached. In the high-concentration stirring, the stirring blade 3 is rotated in a state where the washing tub 2 is fixed (stirring mode) so as to stir the generated detergent having a high detergent concentration and reach the laundry.

  In step S311, the main washing is performed by rotating the stirring blade 3 while the washing tub 2 is fixed (stirring mode) at the set water level for washing. Further, the control unit 19 performs uniform stirring for about 1 minute by rotating the stirring blade 3 forward and backward.

  Then, after passing through a rinsing process (steps S312 and S313), the process proceeds to a final dehydration process (Sstep 314).

  As described above, with respect to the water flow pattern in the main washing, in the standard course, the washing tub 2 is fixed and the stirring blade 3 is rotated in the left-right direction to generate a strong water flow in the washing tub 2 and the circulation channel. The amount of washing water flowing into R is increased to achieve high detergency.

  Next, the case of the dry course will be described with reference to FIG. 11, but only the portions different from the case of the standard course of FIG. 10 will be described.

  In contrast to the operation of the standard course, the “detergent detection” in step S304 in FIG. 10 is abolished in the dry course. Also, the stirring operation when the amount of water is low, such as “cloth amount detection” and “high concentration stirring” in the previous step of step S310 is abolished (step S409).

  In the dry course, washing is performed in a mode in which the washing tub 2 and the stirring blade 3 are integrally rotated in the same direction in the main washing process of step S410. As a result, rubbing between the laundry and the stirring blade 3 is prevented, and washing that prevents cloth damage, cloth entanglement, shrinkage, and deformation of the garment is possible.

  Next, the case of the delicate course, which is a feature of the present embodiment, will be described with reference to FIG. 12, but only the portions different from the case of the standard course of FIG.

  In contrast to the operation of the standard course, “detergent detection” in step S304 in FIG. 10 is abolished in the delicate course. Also, the stirring operation when the amount of water is low, such as “cloth amount detection” and “high concentration stirring” in the previous step of step S310 is abolished (step S509).

  In the delicate course, the stirring blade 3 is rotated in both forward and reverse directions in the state where the washing tub 2 is not stationary (the washing tub 2 is not fixed but cannot be directly rotated by the driving device 6) in the main washing process of step S510. In the neutral mode, the main washing is performed by rotating the stirring blade 3. In the neutral mode, when the stirring blade 3 starts to rotate, the washing tub 2 rotates in the direction opposite to the rotation direction of the stirring blade 3 by the reaction force, and then stops and rotates in the same direction as the stirring blade 3. As will be described later, the water level is higher than that of the standard course.

  As described above, the agitation operation when the water level is low such as “detergent amount detection”, “cloth amount detection”, “high concentration agitation”, etc., is abolished in the same manner as the dry course, so that the laundry and the agitating blade 3 are rubbed. It prevents washing and prevents cloth damage, fabric entanglement, shrinkage, and shape loss.

  In the main washing process, after sufficient washing water is accumulated in the washing tub 2 and the water level becomes higher than that in the standard mode, the stirring wing 3 is rotated in the neutral mode without fixing the washing tub 2. Thus, the rubbing of the laundry with the washing tub 2 and the stirring wing 3 is suppressed, and the garment is caused by the relative rotation of the stirring wing 3 and the washing tub 2 while suppressing cloth damage, cloth entanglement, shrinkage, and deformation of the clothing. Washing with high detergency is possible by water flow.

  FIG. 13 is a diagram comparing the stirring operation in the main washing in the standard course, the dry course, and the delicate course, and shows the change in the rotation speed of the stirring blade 3 with respect to the elapsed time. At this time, it is assumed that the load of the laundry is the same in each course.

  Symbol (A) indicates the difference in the maximum number of rotations of the stirring blade 3 between the standard course and the delicate course. In the delicate course, the stirring blade 3 is rotated at a speed lower than that of the standard course. As a result, strong water flow is not generated, and the laundry, the washing tub 2 and the stirring blade 3 are prevented from rubbing and washing with high detergency is performed while suppressing cloth damage, cloth entanglement, shrinkage, and deformation of the clothing. It is possible.

  Symbol (B) indicates the difference in the acceleration rate of the rotation speed of the stirring blade 3 until the maximum rotation speed of the standard course and the delicate course is reached. The delicate course has a lower acceleration rate than that of the standard course. The rotational speed is increased. As a result, the laundry and the stirring blade 3 are prevented from rubbing at the start of rotation of the stirring blade 3, and washing with high detergency is possible while suppressing cloth damage, cloth entanglement, shrinkage, and shape loss of clothing. Moreover, since the acceleration rate of the rotation speed of the stirring blade 3 is high in the standard course, a strong water flow in which the vertical direction and the rotation direction are combined in the washing tub 2 is generated, and the laundry and the stirring blade 3 are in direct contact with each other to perform high cleaning. The power is realized. On the other hand, in the delicate course, since the rotational speed of the stirring blade 3 is slowly increased, only a swirling water flow in the rotational direction is generated in the washing tub 2, so that the laundry and the stirring blade 3 are in direct contact with each other. Does not occur.

  The symbol (C) indicates the difference between the rest time of the standard course and the delicate course. In the delicate course, a longer rest time than that of the standard course is provided so that the rotation of the stirring blade 3 is stopped, and then the inside of the washing tub 2 Since the stirring blade 3 is rotated in the opposite direction in a state where the water flow is weakened, no strong water flow is generated, and it is possible to perform washing while suppressing cloth damage, cloth entanglement, shrinkage, and deformation of the clothing.

  The symbol (D) indicates the difference in rotation of the stirring blade 3 when the stirring of the standard course and the delicate course is stopped. In the standard course, the rotation of the stirring blade 3 is suddenly stopped, whereas in the delicate course, The rotation of the stirring blade 3 is slowly stopped (the deceleration rate is low). By doing so, since the water flow in the washing tub 2 does not change abruptly, it is possible to perform washing with high detergency while suppressing cloth damage, entanglement, shrinkage, and deformation of the clothing. Furthermore, since the washing tub 2 is fixed in the standard course, only the clothes move with the water flow in the washing tub 2 after the stirring blade 3 is stirred. On the other hand, since the washing tub 2 is not fixed in the delicate course, not only the clothes but also the washing tub 2 rotates in the same direction after the stirring blade 3 is stirred, so that rubbing between the laundry and the washing tub 2 hardly occurs. Cloth damage, cloth entanglement, shrinkage, and deformation of clothing can be suppressed.

  FIG. 14 is a diagram comparing the change in the water level in the washing tub 2 during the main washing in the standard course, the dry course, and the delicate course. In FIG. 14, the broken line is a standard course, the solid line is a delicate course, and the alternate long and short dash line is a dry course. At this time, it is assumed that the load of the laundry is the same in each course.

  As shown in FIG. 14, the set water level for washing the delicate course is higher than the set water level for washing the standard course and the dry course, and after the detergent is dissolved, the water is supplied to the set water level all at once. As a result, when the stirring blade 3 is rotated during main washing, the distance between the stirring blade 3 and the laundry is sufficient, so that the contact between the stirring blade 3 and the laundry can be suppressed. Further, as described above, since the cloth amount is not detected and the high-concentration stirring is not performed in the previous process of the delicate course, the time until the main washing (washing at the set water level) is shorter than that in the standard course.

  FIG. 15 is a diagram illustrating the relationship among the stirring blade 3, movement, and movement of clothes. As shown in FIG. 15 (a), for example, clothes such as a wool material are not sufficiently hydrated and washed because the clothes float on the water surface when the stirring blade 3 is stopped even during washing. Power is difficult to secure. In the present embodiment, by rotating the stirring blade 3, the washing water in the washing tub 2 causes a spiral water flow, and the water surface becomes a mortar shape. With this water flow, the clothes in the washing tub 2 can be drawn downward to allow the clothes to contain water (FIG. 15B). Furthermore, since the shower is sprinkled from above the washing tub with the rotation of the stirring blade 3, the moisture content of the clothes further increases. In this way, even when a clothing that tends to float on the water surface, such as a wool material, is used by utilizing a circulating shower associated with the rotation of the stirring blade 3, the cleaning power can be ensured.

  In the above-described delicate course, the example in which the washing is performed in the neutral mode has been described. However, the present invention is not limited thereto, and the washing of the delicate course can be performed in the stirring mode in which the stirring blade 3 is rotated while the washing tub 2 is fixed. May be executed. At this time, by increasing the water level or decreasing the rotation rate of the stirring blade 3 or the rotation speed of the stirring blade 3, the cloth can be prevented from being damaged, entangled, shrunk, or deformed. Cleaning with is possible.

  Moreover, in the above-described delicate course, the example of washing at a set water level higher than that of the standard course has been described. However, the set water level is the same as that of the standard course, and the rotation rate of the stirring blade 3 and / or the rotation of the stirring blade 3 is increased. The number may be lower than the standard course. As a result, the cloth can be washed with a high detergency while suppressing garment damage, cloth entanglement, shrinkage, and shape loss.

DESCRIPTION OF SYMBOLS 1 Washing machine 2 Washing tub 3 Stirring blade 21 Trunk plate 22 Bottom plate 22a Bottom (bottom)
22a1 bottom 22b side 23 balance ring 23 bottom surface 24, 25 circulation ring member 24b1 collar 27 inlet 31 discharge port 33 back blade (radial rib)
35 Outer peripheral side rib (circumferential rib)
35a Tip of outer rib 36, 37 Inner rib (circumferential rib)
36a, 37a End of inner peripheral rib D Radial direction Hm Inlet height position R Circulation channel W Circumferential direction

Claims (5)

A washing tub,
A stirring blade provided at the bottom of the washing tub;
A driving device for rotationally driving the washing tub and the stirring blade;
In a washing machine comprising water supply means for supplying water to the washing tub,
A first washing course that is a standard course, and a second washing course that is different from the first washing course,
When the first washing course is selected, in a state where water is supplied to the washing tub to the first set water level by the water supply means, washing is performed by rotating the stirring blade,
When the second washing course is selected, washing is performed by rotating the stirring blade while the water supply means supplies the washing tub to a second set water level higher than the first set water level. A washing machine characterized by that. The washing machine according to claim 1,
When the first washing course is selected, the driving device sets the stirring mode to fix the rotation of the washing tub,
When the second washing course is selected, the driving device sets the neutral mode in which the rotation of the washing tub is not fixed. The washing machine according to claim 1,
The washing machine, wherein the maximum rotation speed of the stirring blade is lower when the second washing course is selected than when the first washing course is selected. The washing machine according to claim 1,
The acceleration rate of the rotational speed until the maximum rotational speed of the stirring blade is reached is lower when the second laundry course is selected than when the first laundry course is selected. And a washing machine. A washing tub,
A stirring blade provided at the bottom of the washing tub;
A driving device for rotationally driving the washing tub and the stirring blade;
In a washing machine comprising water supply means for supplying water to the washing tub,
A first washing course that is a standard course, and a second washing course that is different from the first washing course,
The acceleration rate of the rotational speed until the maximum rotational speed of the stirring blade is reached is lower when the second laundry course is selected than when the first laundry course is selected, and / or The washing machine characterized in that the maximum rotation speed of the stirring blade is low.

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