JP2020005794A - Vertical type washing machine - Google Patents

Abstract

To provide a vertical type washing machine which can smoothly execute processing for spraying water in a washing tub by raising water by the rotation of a washing tub, and which can achieve a shortened washing time.SOLUTION: A vertical type washing machine 1 includes: an outer tub 3; a motor 6; a washing tub 4 arranged in the outer tub 3; a pulsator 5 arranged in the washing tub 4; and a microcomputer 21. The washing tub 4 and the pulsator 5 rotate by receiving a driving force of the motor 6. At least in any of a washing step and a rinsing step, the microcomputer 21 executes: agitation processing for agitating laundry Q in the washing tub 4 by rotating the pulsator 5 in a state where water is stored in the washing tub 4; disentangling processing for disentangling the laundry Q by rotating the pulsator 5 in a state where the water is stored in the washing tub 4 after the agitation processing; and tub rotation processing for raising the water in the outer tub 3 between the outer tub 3 and the washing tub 4 by rotating the washing tub 4 in which the water is stored after the disentangling processing, and spraying the water to the laundry Q in the washing tub 4.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vertical washing machine.

  The washing machine described in Patent Literature 1 below includes a washing and dewatering tub in which a pulsator is rotatably disposed at an inner bottom portion, a receiving tub in which the washing and dewatering tub is rotatably included, and a pulsator or a washing and dewatering tub rotating. It includes a driving means for driving and a control means for controlling a washing step, a rinsing step, and the like. The control means executes a stirring step and a washing tub rotating step in the washing step and the rinsing step. The control means drives the pulsator to reverse in the stirring step. In the washing tub rotating step, the control means rotates the washing and dewatering tub to raise the washing water between the washing and dewatering tub and the receiving tub, and sprays water into the washing and dewatering tub from above.

Japanese Patent No. 3975044

  In the washing tub rotating step performed in the washing machine described in Patent Document 1, it is necessary to rotate the washing and dewatering tub at a high speed above a certain speed in order to raise the washing water and spray water into the washing and dewatering tub. There is. However, if the bias of the laundry in the washing and spin-drying tub is greater than a predetermined value, the rotation speed of the washing and spin-drying tub does not increase smoothly, and abnormal vibration occurs in the washing and spin-drying tub. It is difficult to continue. In addition, when abnormal vibration occurs, in order to eliminate the bias of the laundry, there is a process of supplying water to the washing and dewatering tub, soaking the laundry in water, rotating the pulsator to loosen the laundry, and then draining the laundry. Although generally performed, this process increases the washing time.

  The present invention has been made under such a background, and provides a vertical washing machine capable of smoothly performing a process of raising water by rotating a washing tub to spray water into the washing tub and shortening a washing time. The purpose is to do.

  The present invention relates to an outer tub in which water is stored, a driving means for generating a driving force, and a washing tub arranged in the outer tub for storing laundry, wherein water flows between the outer tub and the outer tub. A washing tub having a through hole for allowing the laundry to enter and exit, the laundry being formed at an upper end, a bottom wall being provided at a lower end, and a washing tub rotating by receiving a driving force of the driving means; and A rotating blade that is disposed on a wall and rotates by receiving a driving force of the driving unit; a water supply unit that supplies water into the washing tub; and a control unit that controls the driving unit and the water supply unit. In the washing step and / or the rinsing step after the washing step, the washing is performed by rotating the rotary wings by the driving means in a state where water is stored in the washing tub by the water supply means. Stir the laundry in the tub A stirring process, and after the stirring process, the rotating blades are rotated by the driving means in a state where water is accumulated in the washing tub, thereby loosening the laundry in the washing tub, and the loosening process. Later, by rotating the washing tub filled with water by the driving means, the water in the outer tub is raised between the outer tub and the washing tub, and the laundry in the washing tub is taken from the entrance. A vertical washing machine that performs a tub rotation process for bathing in a bath.

  Further, the invention is characterized in that the vertical washing machine further includes a detecting means for detecting a magnitude of deviation of the laundry in the washing tub in which water is accumulated during the tub rotation processing.

  In addition, according to the present invention, when the detection unit detects a deviation of a predetermined size or more during the tub rotation process, the control unit rotates at least one of the washing tub and the rotary blade by the driving unit. Thus, the laundry in the washing tub is loosened.

  Further, according to the present invention, when the detecting means detects a deviation of a predetermined size or more during the tub rotation processing, the control means stops the rotation of the washing tub and rotates the rotary blade, The laundry in the washing tub is agitated.

  According to the present invention, in the vertical washing machine, in at least one of the washing step and the rinsing step, the stirring process, the loosening process, and the tub rotation process are performed in this order. In the stirring process, the rotating wings rotate while water is accumulated in the washing tub, so that the laundry in the washing tub is washed by being stirred. In the loosening process after the stirring process, the rotating wings rotate in a state where water is accumulated in the washing tub, and thus the unevenness of the laundry is eliminated by loosening the laundry in the washing tub. In the tub rotation process after the loosening process, the water in the outer tub rises between the outer tub and the washing tub by rotating the washing tub in which the water is accumulated, and the water in the washing tub is moved from the entrance at the upper end of the washing tub. Washed with laundry. By such water spraying from the upper side, the laundry on the doorway side can also be reliably washed. Since the tub rotation process is started in a state in which the unevenness of the laundry has been eliminated in advance by the unraveling process, the rotation speed of the washing tub smoothly rises to the rotation speed at which watering starts in the tub rotation process. Thereby, the tank rotation process can be performed smoothly. In addition, since abnormal vibration of the washing tub is unlikely to occur during the tub rotation process due to the prior loosening process, it is preferable to stop the rotation of the washing tub according to the abnormal vibration and eliminate the unevenness of the laundry in the washing tub. No need to implement. Thereby, the washing time can be reduced.

  Further, according to the present invention, during the tub rotation processing, the magnitude of the unevenness of the laundry in the washing tub in which water is accumulated is detected. In this case, when a deviation of a predetermined size or more is detected, at least one of the washing tub and the rotary wing may be rotated to loosen the laundry in the washing tub. Thereby, the tub rotation process can be continued without stopping the tub rotation process and re-performing the tub rotation process after eliminating the unevenness of the laundry, thereby further shortening the washing time.

  Further, according to the present invention, when a deviation of a predetermined size or more is detected during the tub rotation process, the rotation of the washing tub is stopped, but the rotating blades rotate to stir the laundry in the washing tub. By doing so, the laundry may be subsequently washed. In this case, the laundry can be washed to the same degree as when the rotation of the washing tub is continued.

FIG. 1 is a schematic longitudinal sectional view of a vertical washing machine according to one embodiment of the present invention. FIG. 2 is a block diagram showing an electrical configuration of the vertical washing machine. FIG. 3 is a flowchart showing a washing operation performed in the vertical washing machine. FIG. 4 is a flowchart illustrating the tub rotation process according to the first embodiment in the washing operation. FIG. 5 is a schematic perspective view of the upper part of the washing tub in the vertical washing machine. FIG. 6 is a flowchart showing the tank rotation processing according to the second embodiment.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view of a vertical washing machine 1 according to one embodiment of the present invention. The vertical direction in FIG. 1 is referred to as the vertical direction Z of the vertical washing machine 1, of which the upper side is referred to as an upper side Z1 and the lower side is referred to as a lower side Z2. The vertical washing machine 1 includes a housing 2, an outer tub 3, a washing tub 4, a pulsator 5 as an example of a rotary wing, a motor 6 as an example of a driving unit, and a clutch 7 as an example of a switching unit. And

  The housing 2 is made of, for example, metal and formed in a box shape. An opening 2 </ b> B is formed in the upper surface 2 </ b> A of the housing 2 to communicate the inside and the outside of the housing 2. A door 10 that opens and closes the opening 2B is provided on the upper surface 2A. A display operation unit 11 including a liquid crystal operation panel is provided around the opening 2B on the upper surface 2A. The user of the vertical washing machine 1 operates the display operation unit 11 to select operating conditions for the washing operation performed in the vertical washing machine 1 or to perform the washing operation on the vertical washing machine 1. Can be instructed to start or stop. The display operation unit 11 displays information for the user.

  The outer tank 3 is made of, for example, a resin and is formed in a cylindrical shape with a bottom. The outer tub 3 includes a substantially cylindrical circumferential wall 3A arranged along the vertical direction Z, a bottom wall 3B in which a hollow portion of the circumferential wall 3A is closed from a lower side Z2, and an upper edge of the circumferential wall 3A. And a ring-shaped annular wall 3C projecting toward the center of the circle of the circumferential wall 3A. Inside the annular wall 3C, an entrance 3D communicating with the hollow portion of the circumferential wall 3A from the upper side Z1 is formed. The entrance 3D is in communication with the opening 2B of the housing 2 facing the lower side Z2. A door 12 that opens and closes the entrance 3D is provided on the annular wall 3C. On the lower surface of the annular wall 3C, there is provided a guide surface 3E which is inclined obliquely downward while bordering the entrance 3D. The bottom wall 3B is formed in a disk shape extending substantially horizontally, and a through hole 3F penetrating the bottom wall 3B is formed at the center of the bottom wall 3B.

  A water supply path 13 connected to a tap water tap is connected to the annular wall 3C of the outer tank 3 from the upper side Z1. A water supply valve 14 is provided in the water supply path 13 as an example of water supply means. The water supply valve 14 is constituted by, for example, an electromagnetic valve. A drainage channel 15 is connected to the bottom wall 3B of the outer tub 3 from the lower side Z2. A drain valve 16 as an example of a drain unit is provided in the middle of the drain channel 15. The drain valve 16 is opened and closed by, for example, a torque motor (not shown). When the water supply valve 14 is opened with the drain valve 16 closed, water is supplied from the water supply channel 13 into the outer tub 3, so that water is stored in the outer tub 3. When the water supply valve 14 is closed, the water supply stops. When the drain valve 16 is opened, the water in the outer tub 3 is discharged from the drain channel 15 to the outside of the machine.

  The washing tub 4 is made of, for example, metal, and is formed in a cylindrical shape with a bottom that is slightly smaller than the outer tub 3, and can store the laundry Q therein. The washing tub 4 is coaxially arranged in the outer tub 3. The washing tub 4 housed in the outer tub 3 is rotatable about an axis J extending in the vertical direction Z around the central axis. The washing tub 4 includes a substantially cylindrical circumferential wall 4A arranged along the vertical direction Z, a bottom wall 4B in which a hollow portion of the circumferential wall 4A is closed from a lower side Z2, and an upper edge of the circumferential wall 4A. And a ring-shaped annular wall 4C protruding toward the axis J.

  The inner peripheral surface of the circumferential wall 4 </ b> A is the inner peripheral surface of the washing tub 4. The circumferential wall 4A is in a state surrounded by the circumferential wall 3A of the outer tub 3. The bottom wall 4B is provided at a lower end of the washing tub 4. The annular wall 4C faces the annular wall 3C of the outer tub 3 from below Z2. An entrance 4D is formed inside the annular wall 4C. The entrance 4D is located at the upper end of the washing tub 4 and exposes a hollow portion of the circumferential wall 4A to the upper side Z1. The entrance 4D is in communication with the entrance 3D of the outer tank 3 from the lower side Z2. The user puts laundry Q in and out of the washing tub 4 from the upper side Z1 through the opened opening 2B, the entrance 3D, and the entrance 4D.

  A plurality of through holes 4E are formed in the circumferential wall 4A and the bottom wall 4B of the washing tub 4, and water in the outer tub 3 moves between the outer tub 3 and the washing tub 4 through the through holes 4E. , Is also stored in the washing tub 4. Therefore, the water level in the outer tub 3 and the water level in the washing tub 4 match. The through hole 4E may not be provided in the circumferential wall 4A, but may be provided only in the bottom wall 4B.

  The bottom wall 4B of the washing tub 4 is formed in a disk shape and extends substantially parallel to the bottom wall 3B of the outer tub 3 at an interval Z1 above. A through hole 4F penetrating through the bottom wall 4B is formed at the center of the bottom wall 4B at the center of the circle coinciding with the axis J. A tubular support shaft 17 extending to the lower side Z2 along the axis J while surrounding the through hole 4F is provided on the bottom wall 4B. The support shaft 17 is inserted through the through hole 3F of the bottom wall 3B of the outer tub 3, and the lower end of the support shaft 17 is located on the lower side Z2 than the bottom wall 3B.

  The pulsator 5 is formed in a disk shape with the axis J as the center of the circle, and is disposed on the bottom wall 4 </ b> B in the washing tub 4. On the upper surface of the pulsator 5 facing the entrance 4D of the washing tub 4, a plurality of blades 5A arranged radially are provided. The pulsator 5 is provided with a rotating shaft 18 extending from the center of the circle to the lower side Z2 along the axis J. The rotating shaft 18 is inserted into the hollow portion of the support shaft 17, and the lower end of the rotating shaft 18 is located below the bottom wall 3 </ b> B of the outer tub 3.

  The motor 6 is an electric motor such as an inverter motor. The motor 6 is arranged in the housing 2 on the lower side Z2 of the outer tub 3. The motor 6 has an output shaft 19 that rotates about the axis J, and outputs the generated driving force from the output shaft 19.

  The clutch 7 is interposed between the lower ends of the support shaft 17 and the rotating shaft 18 and the upper end of the output shaft 19 projecting upward from the motor 6 in the upper direction Z1. The clutch 7 selectively transmits the driving force output from the output shaft 19 by the motor 6 to one or both of the support shaft 17 and the rotation shaft 18. When the driving force from the motor 6 is transmitted to the support shaft 17, the washing tub 4 rotates around the axis J under the driving force of the motor 6. When the driving force from the motor 6 is transmitted to the rotating shaft 18, the pulsator 5 receives the driving force of the motor 6 and rotates around the axis J. A known transmission mechanism is used as the clutch 7. The aforementioned torque motor (not shown) may operate the clutch 7.

  FIG. 2 is a block diagram illustrating an electrical configuration of the vertical washing machine 1. The vertical washing machine 1 includes a microcomputer 21 as an example of a water supply unit, a control unit, and a detection unit. The microcomputer 21 includes, for example, a CPU 22, a memory 23 such as a ROM and a RAM, and a timer 24 for clocking, and is built in the housing 2 (see FIG. 1).

  Each of the motor 6, the clutch 7, the water supply valve 14, and the drain valve 16 is electrically connected to the microcomputer 21 via, for example, a drive circuit 25. The display operation unit 11 is also connected to the microcomputer 21. And are electrically connected. The microcomputer 21 drives the motor 6 by turning it on and stops it by turning it off. The microcomputer 21 can also control the rotation direction of the motor 6. Therefore, the motor 6 can rotate forward or reverse. The microcomputer 21 switches the transmission destination of the driving force of the motor 6 to one or both of the washing tub 4 and the pulsator 5 by controlling the clutch 7. The microcomputer 21 controls opening and closing of the water supply valve 14 and the drain valve 16. When the user operates the display operation unit 11 to select driving conditions and the like, the microcomputer 21 accepts the selection. The microcomputer 21 controls display contents of the display operation unit 11.

  The vertical washing machine 1 further includes a buzzer 26 electrically connected to the microcomputer 21, a rotation speed reading device 27, and a water level detection unit 28. The microcomputer 21 notifies the user of the start and end of the washing operation by generating a predetermined sound with the buzzer 26.

  The rotation speed reading device 27 functions as an example of a detecting unit. The rotation speed reading device 27 is a device for reading the rotation speed of the motor 6, more precisely, the rotation speed of the output shaft 19 of the motor 6, and is configured by, for example, a Hall IC. The rotation speed read by the rotation speed reading device 27 is input to the microcomputer 21 in real time. The microcomputer 21 controls the motor 6 to rotate at a desired rotation speed by controlling the duty ratio of the voltage applied to the motor 6 based on the input rotation speed. The rotation speeds of the washing tub 4 and the pulsator 5 may be the same as the rotation speed of the motor 6 or may be obtained by multiplying the rotation speed of the motor 6 by a predetermined constant such as a reduction ratio of the clutch 7. Value may be used.

  The water level detector 28 is a water level sensor that detects the water level in the outer tub 3, that is, the water level in the washing tub 4. As an example of the water level detection unit 28, a pressure type water level sensor that detects the water level in the washing tub 4 based on the pressure in the outer tub 3 can be employed.

  The microcomputer 21 executes the washing operation by controlling the operations of the motor 6, the clutch 7, the water supply valve 14, and the drain valve 16. The washing operation includes a washing step of washing the laundry Q, a rinsing step of the laundry Q after the washing step, and a dehydration step of rotating the washing tub 4 to dehydrate the laundry Q after the rinsing step. Note that the vertical washing machine 1 may be a washing and drying machine that also executes a drying step of drying the laundry Q after the dewatering step. In this embodiment, the rinsing step is performed twice, and the first rinsing step is referred to as a first rinsing step, and the second rinsing step is referred to as a second rinsing step.

  When the user inputs the laundry Q into the washing tub 4 and instructs the start of the washing operation, the microcomputer 21 starts the washing operation. The user may put the detergent into the washing tub 4 before or after putting the laundry Q. Referring to the flowchart of FIG. 3, first, microcomputer 21 detects the amount of laundry Q in washing tub 4, that is, the load amount (step S1). As an example of the load amount detection, the microcomputer 21 detects the load amount based on a variation in the number of revolutions of the motor 6 when the washing tub 4 is constantly rotated at a low speed. The microcomputer 21 determines the water level W (see FIG. 1) of the water to be supplied and stored in the washing tub 4 based on the load amount detected earlier. The relationship between the water level W and the load amount is obtained in advance by an experiment or the like and stored in the memory 23.

  Then, the microcomputer 21 opens the water supply valve 14 continuously to supply water into the washing tub 4 as a water supply process as part of the washing process (step S2). Since the drain valve 16 is in the closed state, the water level in the washing tub 4 rises. When the water level in the washing tub 4 rises to the water level W determined previously, the microcomputer 21 stops water supply by closing the water supply valve 14. Thereby, the water supply process ends.

  Next, in a state where water is accumulated in the washing tub 4, the microcomputer 21 executes a stirring process. Specifically, the microcomputer 21 switches the clutch 7 as necessary so that the driving force of the motor 6 is transmitted to the pulsator 5, and then drives the motor 6 to rotate the pulsator 5 (step S3). ). Although the pulsator 5 may continuously rotate in the same direction, in this embodiment, the intermittent driving of the motor 6 causes the pulsator 5 to reverse so as to alternately rotate forward and reverse at intervals of 1 second to 2 seconds. I do. In the stirring process, the laundry Q in the washing tub 4 is stirred and washed by the reversing pulsator 5. Note that the pulsator 5 may rotate even during the water supply process in step S2, so that the detergent is easily dissolved in water. Dirt on the laundry Q is decomposed by the detergent dissolved in the water. When the predetermined stirring time has elapsed, the microcomputer 21 ends the stirring process.

  After the stirring process, the microcomputer 21 performs the loosening process in a state where water is continuously accumulated in the washing tub 4 (step S4). The microcomputer 21 reverses the pulsator 5 by intermittently driving the motor 6 under conditions different from the stirring process in the loosening process. In this embodiment, as an example, the pulsator 5 inverts at a higher rotation speed than in the stirring process so that the normal rotation and the reverse rotation are alternately repeated at intervals of 0.5 seconds shorter than in the stirring process. Thereby, the laundry Q soaked in water in the washing tub 4 is loosened by the pulsator 5 which is turned over. Therefore, the bias of the laundry Q is eliminated. The unevenness of the laundry Q refers to uneven distribution of the laundry Q in the washing tub 4 and is also called imbalance. When the predetermined loosening time has elapsed, the microcomputer 21 ends the loosening processing.

  After the loosening process, the microcomputer 21 executes a bath rotation process (step S5). Specifically, referring to the flowchart of FIG. 4, first, microcomputer 21 switches clutch 7 so that the driving force of motor 6 is transmitted to washing tub 4 (step S51). Next, the microcomputer 21 checks whether or not the water level in the washing tub 4 has reached a predetermined tub rotation water level (step S52). The tub rotation water level is a water level at which the water in the outer tub 3 does not overflow from the entrance 3D when the washing tub 4 is rotated from now on, and specifically, is higher than half the internal height of the washing tub 4. . If the water level in the washing tub 4 is not at the tub rotation water level (NO in step S52), the water level in the washing tub 4 is higher than the tub rotation water level. Drainage is performed (step S53).

  If the water level in the washing tub 4 has reached the tub rotation water level (YES in step S52), the microcomputer 21 turns on the motor 6 to rotate it (step S54). Thereby, the washing tub 4 in which the water has accumulated up to the tub rotation water level rotates at a high speed of, for example, 200 rpm. Then, a vortex is generated in the outer tank 3, and the water surface S is curved in a U-shape such that the central portion on the axis J side is lower and the outer peripheral portion is higher (see the two-dot chain line in FIG. 1). Thereby, the water in the outer tub 3 rises between the circumferential wall 3A of the outer tub 3 and the circumferential wall 4A of the washing tub 4. The raised water falls while spirally turning and passing between the ribs 3G provided on the lower surface of the annular wall 3C of the outer tub 3 and is poured into the washing tub 4 from the entrance 4D of the washing tub 4. (See the thick two-dot chain line in FIGS. 1 and 5). The guide surface 3E of the annular wall 3C of the outer tub 3 guides the water passing between the ribs 3G downward toward the entrance 4D (see FIG. 1).

  Even if the amount of the laundry Q is large enough to protrude from the water surface in the state after the water supply process, the laundry Q on the entrance 4D side can be reliably washed by the water spray from the upper side Z1 due to the rotation of the washing tub 4. In addition, if the washing is performed by spraying water, the damage of the laundry Q can be reduced. The tub rotation process may be performed only in the case of large-capacity washing in which the amount of the laundry Q is equal to or more than a predetermined amount.

  Since the tub rotation process is started in a state where the bias of the laundry Q has been eliminated in advance by the unraveling process in step S4, the rotation speed of the washing tub 4 in the tub rotation process is smoothly increased to the rotation speed at which watering is started. To increase. Thereby, the tank rotation process can be performed smoothly. In addition, since abnormal vibration of the washing tub 4 is unlikely to occur during the tub rotating process due to the prior loosening process, the rotation of the washing tub 4 is stopped according to the abnormal vibration, and the unevenness of the laundry Q in the washing tub 4 is eliminated. Need not be performed as much as possible. Thereby, the washing time can be reduced.

  During the tub rotation process, the microcomputer 21 detects the magnitude of the unevenness of the laundry Q in the washing tub 4, that is, the so-called eccentric load, in a state where the water continues to accumulate in the washing tub 4 (step S 55). Specifically, as the bias of the laundry Q increases, the variation in the rotation speed of the motor 6 increases. Therefore, the microcomputer 21 detects the deviation of the laundry Q in the washing tub 4 by reading the variation in the rotation speed of the motor 6 with the rotation speed reading device 27. In this case, the time can be reduced as compared with the case where the magnitude of the deviation of the laundry Q is detected after the washing tub 4 is once drained. Note that the magnitude of the deviation of the laundry Q may be detected by another known method. If the deviation of the laundry Q is greater than or equal to a predetermined value, the smooth rotation of the washing tub 4 may be affected.

  If no deviation larger than a predetermined amount is detected (NO in step S55), and if a predetermined tank rotation time has elapsed from the start of rotation of the motor 6 in step S54 (YES in step S56), the microcomputer 21 proceeds to step S54. Then, the motor 6 is stopped to terminate the tank rotation processing (step S57).

  When the microcomputer 21 detects a deviation of a predetermined size or more during the tank rotation processing (YES in step S55), the microcomputer 21 checks whether the current deviation detection is the first deviation detection in the current tank rotation processing. (Step S58). The number of times of deviation detection in the current tank rotation process is temporarily stored in the memory 23.

  If the current deviation detection is the first time (YES in step S58), the microcomputer 21 temporarily stops the rotation of the washing tub 4 by stopping the motor 6 (step S59). Then, the microcomputer 21 switches the clutch 7 so that the driving force of the motor 6 is transmitted to the pulsator 5, and then reverses the pulsator 5 under the same conditions as the loosening process in step S4, for example. The laundry Q inside is loosened (step S60). At this time, since water is already accumulated in the washing tub 4 and the laundry Q is easily immersed in water and loosened, there is no need to supply water to loosen the laundry Q. Note that the microcomputer 21 may rotate the washing tub 4 instead of the pulsator 5 to loosen the laundry Q, or may rotate both the washing tub 4 and the pulsator 5. Further, the washing tub 4 and the pulsator 5 may be rotated only in the same direction, or may be inverted as described above.

  After loosening the laundry Q for a predetermined time, the microcomputer 21 switches the clutch 7 so that the driving force of the motor 6 is transmitted to the washing tub 4 and restarts the rotation of the washing tub 4 (step S54). . That is, when the deviation is detected for the first time in the tub rotation process, the rotation of the washing tub 4 is restarted after the deviation is eliminated by loosening. Thereby, the tub rotation process can be continued without stopping the tub rotation process and re-executing the tub rotation process after eliminating the unevenness of the laundry Q, so that the washing time can be further reduced. On the other hand, if the deviation detection in the current tank rotation processing is the second or more (NO in step S58), the microcomputer 21 stops the motor 6 to stop the tank rotation processing (step S57).

  When the tank rotation processing is completed or stopped as described above, the washing step is completed. Next, referring to FIG. 3, the microcomputer 21 rotates the washing tub 4 at a high speed with the drain valve 16 opened as a dehydration step after the washing step, that is, an intermediate dehydration step (step S6). The laundry in the washing tub 4 is dehydrated by the centrifugal force generated by the high-speed rotation. Water that has permeated from the laundry due to dehydration is discharged from the drainage channel 15 to the outside of the machine. At the end of the intermediate dehydration step, the microcomputer 21 switches the clutch 7 to stop the motor 6 so that the driving force of the motor 6 is not transmitted to the washing tub 4, so that the washing tub 4 rotates by inertia. At the end of the intermediate dewatering step, the microcomputer 21 closes the drain valve 16.

  Next, the microcomputer 21 performs shower rinsing as a first rinsing step (step S7). Specifically, the microcomputer 21 supplies shower water into the washing tub 4 by intermittently opening the water supply valve 14 with the drain valve 16 closed. In this state, the microcomputer 21 rotates the washing tub 4 at a low speed of, for example, 30 rpm so that the shower spreads over every corner of the laundry Q. Thereby, the laundry Q in the washing tub 4 is evenly rinsed. Thereafter, the microcomputer 21 executes the same intermediate dehydration step as in step S6 (step S8). In addition, you may consider each intermediate | middle dehydration process as a part of process in the immediately following rinsing process.

  Next, the microcomputer 21 performs a second rinsing step. The content of the second rinsing step is the same as the washing step except that no detergent is present. Specifically, the microcomputer 21 supplies water similarly to step S2 (step S9), then stirs and rinses the laundry Q as in step S3 (step S10). Is released (step S11), and then a tank rotation process is executed as in step S5 (step S12).

  Finally, the microcomputer 21 executes a final dehydration step similar to the intermediate dehydration step (Step S13). However, the rotation condition of the washing tub 4 may be different between the intermediate dewatering step and the final dewatering step. In particular, the maximum rotation speed of the washing tub 4 in the final dewatering step is the maximum rotation speed of the washing tub 4 in the intermediate dewatering step. Higher than. The washing operation ends when the final spin-drying step is completed.

  The tank rotation process includes a second embodiment in addition to the first embodiment described above. FIG. 6 is a flowchart showing the tank rotation processing according to the second embodiment. In FIG. 6, the same processing steps as those in FIG. 4 are denoted by the same step numbers as those in FIG. 4, and detailed description of the processing steps is omitted.

  In the second embodiment, when the microcomputer 21 detects a bias of a predetermined size or more during the tub rotation processing (YES in step S55), the microcomputer 6 immediately stops the motor 6 to stop the rotation of the washing tub 4. (Step S61). In this case, the microcomputer 21 switches the clutch 7 so that the driving force of the motor 6 is transmitted to the pulsator 5, and then rotates the pulsator 5, thereby stirring the laundry Q in the washing tub 4 ( Step S62). As described above, the washing method is changed from the rotation of the washing tub 4 to the stirring of the pulsator 5, and the laundry Q is continuously washed, so that the washing is performed to the same degree as when the rotation of the washing tub 4 is continued in the tub rotating process. The article Q can be washed.

  When the laundry Q is stirred for a predetermined time, the microcomputer 21 changes the driving condition of the motor 6 so that the laundry Q in the washing tub 4 is pulsated by the pulsator 5 under the same condition as the loosening process in step S4, for example. (Step S63). When the laundry Q is loosened for a predetermined time, the microcomputer 21 ends the tub rotation process by stopping the motor 6 (step S57). The loosening in step S63 can prevent occurrence of abnormal vibration when the washing tub 4 rotates at a high speed in a subsequent dehydration step or the like.

  The present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims.

  For example, in the above-described embodiment, the stirring process, the loosening process, and the tank rotation process are performed in both the washing process and the second rinsing process, but may be performed in only one of the washing process and the second rinsing process. Then, it may be executed in the first rinsing step. As described above, the contents of the tank rotation processing (Step S5) in the washing step and the tank rotation processing (Step S12) in the second rinsing step may be the same or different. When the contents are different, the contents of the tank rotating process (step S5) in the washing process are one of the first embodiment and the second embodiment, and the contents of the tank rotating process (step S12) in the second rinsing process are as follows. It may be the other of the first embodiment and the second embodiment.

  In the tank rotation processing according to the first embodiment, if a deviation of a predetermined size or more is detected twice or more (NO in step S58), the microcomputer 21 immediately stops the tank rotation processing (step S57). ). Alternatively, the microcomputer 21 stops the motor 6 (step S61), switches the clutch 7, then reverses the pulsator 5 to stir the laundry Q in the washing tub 4 (step S62). After the loosening (step S63), the tank rotation process may be stopped (step S57). That is, a part of the second embodiment may be combined with the first embodiment.

  The axis J of the washing tub 4 in the vertical washing machine 1 is arranged so as to extend vertically along the up-down direction Z in the above-described embodiment (see FIG. 1). Are arranged slightly inclined with respect to the vertical direction Z.

DESCRIPTION OF SYMBOLS 1 Vertical washing machine 3 Outer tub 4 Washing tub 4B Bottom wall 4D doorway 4E Through hole 5 Pulsator 6 Motor 14 Water supply valve 21 Microcomputer 27 Rotation speed reading device Q Laundry

Claims (4)

An outer tank in which water is stored,
Driving means for generating a driving force;
A washing tub disposed in the outer tub for storing laundry, the washing tub having a through-hole for flowing water between the outer tub and the outer tub, and an inlet / outlet for the laundry formed at an upper end and a bottom wall. Is provided at the lower end, a washing tub that rotates by receiving the driving force of the driving means,
A rotating wing that is arranged on the bottom wall in the washing tub and rotates by receiving a driving force of the driving unit,
Water supply means for supplying water into the washing tub,
Control means for controlling the driving means and the water supply means,
The control means, in at least one of the washing step and the rinsing step after the washing step,
In a state where water is stored in the washing tub by the water supply means, by rotating the rotating blades by the driving means, a stirring process of stirring the laundry in the washing tub,
After the stirring process, by rotating the rotating wings by the driving means in a state where water is accumulated in the washing tub, a loosening process of loosening the laundry in the washing tub,
After the unraveling treatment, the washing tub in which water is accumulated is rotated by the driving means, so that water in the outer tub is raised between the outer tub and the washing tub, and the water in the washing tub is moved from the entrance to the inside of the washing tub. A vertical washing machine that performs a tub rotation process for bathing laundry.   The vertical washing machine according to claim 1, further comprising: a detection unit configured to detect a magnitude of unevenness of the laundry in the washing tub in which water is accumulated during the tub rotation processing.   When the detecting means detects a deviation of a predetermined size or more during the tub rotation processing, the control means rotates at least one of the washing tub and the rotary wing by the driving means, so that the inside of the washing tub is The vertical washing machine according to claim 2, wherein the laundry is loosened.   When the detecting means detects a deviation of a predetermined size or more during the tub rotation processing, the control means stops the rotation of the washing tub and rotates the rotating blades, thereby washing the inside of the washing tub. The vertical washing machine according to claim 2, wherein the thing is agitated.

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