WO2020207141A1

WO2020207141A1 - Vertical washing machine

Info

Publication number: WO2020207141A1
Application number: PCT/CN2020/076990
Authority: WO
Inventors: 间宫春夫; 田岛登; 川端睦美
Original assignee: 青岛海尔洗衣机有限公司; Aqua株式会社; 海尔智家股份有限公司
Priority date: 2019-04-12
Filing date: 2020-02-27
Publication date: 2020-10-15
Also published as: JP2024019637A; JP7432184B2; CN113631769B; JP2020171609A; CN113631769A

Abstract

A vertical washing machine, which is able to smoothly implement a process of pushing water upward by means of rotation of a washing tub and spraying water into the washing tub to shorten washing time, and to inhibit laundry from coming out of the washing tub due to the process. The vertical washing machine (1) comprises an outer tub (3), a washing tub (4) and a pulsator (5). Executing the following processes in at least one of the washing process and the rinsing process: an agitation process, in which water is injected into the washing tub (4) and the pulsator (5) rotates to agitate laundry (Q); a spreading-out process, in which water is injected into the washing tub (4) and the pulsator (5) rotates to spread out the laundry (Q); and a tub rotating process, in which the washing tub (4) is rotated to push the water in the outer tub (3) upward, so that the water is sprayed on the laundry (Q) in the washing tub (4). In cases where the load of the laundry (Q) is higher than a specified value, a coming-out inhibition process for inhibiting the laundry (Q) from coming out of the washing tub (4) is executed at least one of before and after the rotation of the washing tub (4) in the tub rotating process.

Description

Vertical washing machine

Technical field

The invention relates to a vertical washing machine.

Background technique

The washing machine described in the following Patent Document 1 includes: a washing and dehydration tub, in which a pulsator is rotatably arranged at its inner bottom; a receiving bucket, which rotatably encloses the washing and dehydration barrel; The dewatering barrel is rotated and driven; and the control unit controls the cleaning process and rinsing process. The control unit performs the stirring process and the washing tub rotation process during the cleaning process and the rinsing process. During the stirring process, the control unit drives the pulsator in reverse. During the rotation of the washing tub, the control unit drives the rotation of the washing and dehydration tub to increase the washing water between the washing and dehydration tub and the water receiving tub, and sprinkle water into the washing and dehydration tub from above.

In the washing tub rotation process performed in the washing machine described in Patent Document 1, in order to raise the washing water and sprinkle water into the washing and dehydrating tub, the washing and dehydrating tub needs to be rotated at a high speed at a rotation speed higher than a certain level. However, when the deviation of the laundry in the washing and dewatering tub is greater than a predetermined value, the rotation speed of the washing and dewatering tub cannot be smoothly increased, and the washing and dewatering tub will generate abnormal vibrations. Therefore, it is difficult to continue the rotation of the washing tub. Moreover, when abnormal vibration occurs, in order to eliminate the bias of the washing, the washing and dehydration tank is generally supplied with water, the washing is immersed in the water, and then the pulsator is rotated to spread the washing and drain it. However, this treatment Will make the washing time longer.

In addition, when the washing tub rotation process is performed with a large amount of laundry in the washing and dehydration tub, the laundry will rise along the inner circumference of the washing and dehydration tub with the high-speed rotation of the washing and dehydration tub, and partially washed I am afraid that the material will emerge from the entrance and exit at the upper end of the washing and dehydrating barrel. The emerging laundry may be soiled or damaged due to friction by members around the entrance and exit during the dehydration process.

Prior art literature

Patent literature

Patent Document 1: Japanese Patent No. 3972504

Summary of the invention

The problem to be solved by the invention

The present invention was completed under this background, and its purpose is to provide a vertical washing machine that can smoothly implement the treatment of raising water through the rotation of the washing tub and spraying water into the washing tub, and can shorten the washing time. The washing can be prevented from coming out of the washing tub due to this treatment.

Solution to the problem

The present invention is a vertical washing machine, comprising: an outer tub that can store water; a driving unit that generates driving force; a washing tub, which is arranged in the outer tub, contains laundry, and has a function for making water in the washing tub The through hole communicates with the outer tub, the upper end is formed with an inlet and outlet for washing, and the lower end is provided with a bottom wall. The washing tub is rotated by receiving the driving force of the driving unit; a rotating wing is in the washing tub It is arranged on the bottom wall to receive the driving force of the driving unit to rotate; a water supply unit to supply water to the washing tub; a control unit to control the driving unit and the water supply unit; and a detection unit to detect For the load amount of the laundry in the washing tub, the control unit performs the following processing during at least any one of the washing process and the rinsing process after the washing process: agitation processing is performed by the water supply unit to the washing tub In a state where water is stored in the interior, the rotating wing is rotated by the drive unit, thereby stirring the laundry in the washing tub; a spreading treatment, after the stirring treatment, is transferred to the washing tub The rotating wing is rotated by the drive unit in a state where water is stored in the washing tub, thereby spreading the laundry in the washing tub; and a tub rotation process, after the spreading process, passes through the The driving unit rotates the washing tub that stores water, thereby causing the water in the outer tub to rise between the outer tub and the washing tub and pour into the washing tub from the inlet and outlet. When the detection unit detects a load greater than a predetermined value, the control unit executes a method for suppressing at least one of before and after the rotation of the washing tub in the tub rotation processing Suppressing the emergence of laundry out of the washing tub from the inlet and outlet.

In addition, the present invention is characterized in that, as the emission suppression processing, the control unit rotates the rotary wing by the drive unit immediately after the tub rotation processing, thereby turning the washing tub The washing is spread out.

In addition, the present invention is characterized in that the vertical washing machine further includes a drain unit that drains the water in the outer tub as the emergence suppression treatment, and the control unit rotates the tub during the treatment On the eve of the rotation of the washing tub in, part of the water in the outer tub is drained through the drain unit.

Invention effect

According to the present invention, in the vertical washing machine, in at least one of the washing process and the rinsing process, the stirring process, the spreading process, and the tub rotation process are sequentially performed. In the stirring process, the rotating blade rotates in a state where water is stored in the washing tub, and therefore, the laundry in the washing tub is washed by stirring. In the spreading process after the stirring process, the rotating blade rotates with water in the washing tub. Therefore, the laundry in the washing tub is spread out to eliminate the bias of the washing. In the barrel rotation process after the spreading process, the washing tub containing water is rotated, so that the water in the outer tub rises between the outer tub and the washing tub and is poured into the washing tub from the inlet and outlet of the upper end of the washing tub. Things. By spraying water from the upper side in this way, the laundry on the inlet and outlet side can be washed reliably. The tub rotation process is started in a state where the bias of the laundry is eliminated in advance by the spreading process. Therefore, in the tub rotation process, the rotation speed of the washing tub is smoothly increased to the rotation speed at which water is started. As a result, the barrel rotation process can be smoothly performed. In addition, through the pre-spreading treatment, abnormal vibration of the washing tub is not easily generated during the rotation of the tub. Therefore, as far as possible, the treatment of stopping the rotation of the washing tub due to the abnormal vibration to eliminate the bias of the laundry in the washing tub is implemented. It can be done. As a result, the washing time can be shortened.

In addition, when the load in the washing tub is equal to or greater than a predetermined value, the emission suppression processing is executed before or after the rotation of the washing tub in the tub rotation processing. Therefore, it is possible to prevent the laundry from emerging from the inlet and outlet to the outside of the washing tub due to the tub rotation processing by the emergence suppression processing.

In addition, according to the present invention, as the emission suppression treatment, after the tub rotation treatment, the rotary wing rotates to spread the laundry in the washing tub. Thereby, the laundry in the washing tub can be sinked away from the entrance and exit. Therefore, even in a state where the laundry in the washing tub is approaching the inlet and outlet during the tub rotation processing, the emergence of the laundry from the inlet and outlet to the outside of the washing tub can be suppressed by the emergence suppression treatment immediately after the tub rotation processing.

In addition, according to the present invention, as the emission suppression treatment, a part of the water in the outer tub is discharged on the eve of the rotation of the washing tub in the tub rotation processing, and therefore, the water level in the washing tub decreases. As a result, the laundry in the washing tub can be lowered and moved away from the inlet and outlet in the state on the eve of the start of rotation of the washing tub in the tub rotation processing. Therefore, it is possible to prevent the laundry from coming out of the washing tub from the inlet and outlet due to the subsequent rotation of the washing tub.

Description of the drawings

Fig. 1 is a schematic longitudinal sectional view of a vertical washing machine according to an embodiment of the present invention.

Fig. 2 is a block diagram showing the electrical structure of the vertical washing machine.

Fig. 3 is a flowchart showing a washing operation executed in the vertical washing machine.

Fig. 4 is a flowchart showing the tub rotation processing of the first embodiment during 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 barrel rotation processing of the second embodiment.

Description of reference signs:

1: vertical washing machine; 3: outer tub; 4: washing tub; 4B: bottom wall; 4D: entrance and exit; 4E: through hole; 5: pulsator; 6: motor; 14: water supply valve; 16: drain valve; 21 : Microcomputer; 27: Rotation speed reading device; Q: Laundry.

detailed description

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a schematic longitudinal sectional view of a vertical washing machine 1 according to an embodiment of the present invention. The up-down direction in Fig. 1 is referred to as the up-down direction Z of the vertical washing machine 1. Among the up-and-down directions Z, the upper side is referred to as the upper side Z1, and the lower side is referred to as the lower side Z2. The vertical washing machine 1 includes a box body 2, an outer tub 3 housed in the box body 2, a washing tub 4 housed in the outer tub 3, a pulsator 5 as an example of a rotary wing housed in the washing tub 4, and A motor 6 which is an example of a driving unit that rotates the washing tub 4 and the pulsator 5 and a clutch 7 which is an example of a switching unit that switches the transmission destination of the driving force of the motor 6.

The box 2 is, for example, made of metal and formed into a box shape. An opening 2B that communicates the inside and outside of the box 2 is formed on the upper surface 2A of the box 2. A door 10 that opens/closes the opening 2B is provided on the upper surface 2A. Around the opening 2B in the upper surface 2A, a display operation section 11 composed of a liquid crystal operation panel or the like is provided. The user of the vertical washing machine 1 can select the operating conditions of the washing operation performed in the vertical washing machine 1 by operating the display operation unit 11, or instruct the vertical washing machine 1 to start and stop the washing operation. The display operation unit 11 displays information provided to the user.

The outer tub 3 is made of resin, for example, and is formed in a cylindrical shape with a bottom. The outer barrel 3 has: an approximately cylindrical circumferential wall 3A arranged in the vertical direction Z, a bottom wall 3B that blocks the hollow portion of the circumferential wall 3A from the lower side Z2, and a center along the upper edge of the circumferential wall 3A toward the circumferential wall 3A An annular wall 3C protruding from the side. On the inner side of the annular wall 3C, a port 3D communicating with the hollow portion of the circumferential wall 3A from the upper side Z1 is formed. The port 3D faces the opening 2B of the box 2 from the lower side Z2, and is in a state of communicating with the opening 2B. The annular wall 3C is provided with a door 12 for opening/closing the entrance 3D. The lower surface of the annular wall 3C is provided with a guide surface 3E that surrounds the entrance and exit 3D and is inclined obliquely lower. The bottom wall 3B is formed in a circular plate shape extending substantially horizontally, and a through hole 3F penetrating the bottom wall 3B is formed at a center position of the bottom wall 3B.

To the annular wall 3C of the outer tub 3, a water supply channel 13 connected to a tap for tap water is connected from the upper side Z1. A water supply valve 14 as an example of a water supply unit is provided in the middle of the water supply path 13. The water supply valve 14 is constituted by, for example, an electromagnetic valve. The bottom wall 3B of the outer tub 3 is connected with a drainage passage 15 from the lower side Z2. A drain valve 16 as an example of a drain unit is provided in the middle of the drain passage 15. The drain valve 16 is opened/closed by, for example, a torque motor (not shown). When the water supply valve 14 is opened in a state where the drain valve 16 is closed, the water is stored in the outer tub 3 by supplying water from the water supply path 13 to the outer tub 3. When the water supply valve 14 is closed, the water supply is stopped. When the drain valve 16 is opened, the water in the outer tub 3 is drained from the drain 15 to the outside of the machine.

The washing tub 4 is made of metal, for example, and is formed in a cylindrical shape with a bottom that is slightly smaller than the outer tub 3, and can store laundry Q inside. The washing tub 4 is coaxially arranged in the outer tub 3. The washing tub 4 in the state housed in the outer tub 3 can be rotated around an axis J that constitutes its central axis and extends in the vertical direction Z. The washing tub 4 has: an approximately cylindrical circumferential wall 4A arranged in the vertical direction Z, a bottom wall 4B that blocks the hollow portion of the circumferential wall 4A from the lower side Z2, and a protruding portion along the upper edge of the circumferential wall 4A toward the axis J Annular annular wall 4C.

The inner circumferential surface of the circumferential wall 4A is the inner circumferential 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 the lower end of the washing tub 4. The annular wall 4C is in a state facing the annular wall 3C of the outer tub 3 from the lower side Z2. A port 4D is formed inside the annular wall 4C. The entrance 4D is located at the upper end of the washing tub 4, exposing the hollow part of the circumferential wall 4A to the upper side Z1. The port 4D is in a state of being opposed to and communicating with the port 3D of the outer tub 3 from the lower side Z2. The user puts and takes out the laundry Q into the washing tub 4 from the upper side Z1 through the open 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 the water in the outer tub 3 can also flow between the outer tub 3 and the washing tub 4 through the through holes 4E, thereby also being stored in the washing tub 4 Inside. Therefore, the water level in the outer tub 3 is consistent with the water level in the washing tub 4. It should be noted that the through hole 4E may not be provided in the circumferential wall 4A but only in the bottom wall 4B.

The bottom wall 4B of the washing tub 4 is formed in a disk shape, and extends substantially in parallel with the bottom wall 3B on the upper side Z1 of the bottom wall 3B of the outer tub 3 with an interval therebetween. A through hole 4F that penetrates the bottom wall 4B is formed at a center position of the bottom wall 4B that coincides with the axis J. The bottom wall 4B is provided with a tubular support shaft 17 which surrounds the through hole 4F and extends along the axis J to the lower side Z2. The support shaft 17 is inserted into 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 of the bottom wall 3B.

The pulsator 5 is formed in a disk shape centered on the axis J, and is arranged on the bottom wall 4B in the washing tub 4. The upper surface of the pulsator 5 facing the inlet and outlet 4D of the washing tub 4 is provided with a plurality of blades 5A arranged radially. The pulsator 5 is provided with a rotating shaft 18 extending from its center along the axis J to the lower side Z2. 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 on the lower side Z2 of the bottom wall 3B of the outer tub 3.

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

The clutch 7 is interposed between the lower end of each of the support shaft 17 and the rotating shaft 18 and the upper end of the output shaft 19 protruding from the motor 6 to the upper side Z1. The clutch 7 selectively transmits the driving force output by the motor 6 from the output shaft 19 to one or both of the support shaft 17 and the rotating shaft 18. When the driving force from the motor 6 is transmitted to the support shaft 17, the washing tub 4 receives the driving force of the motor 6 and rotates around the axis J. 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. As the clutch 7, a known transmission mechanism is used. The aforementioned torque motor (not shown) may also operate the clutch 7.

FIG. 2 is a block diagram showing the electrical structure 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, a detection unit, and a drainage unit. The microcomputer 21 includes, for example, a CPU 22, a memory 23 such as a ROM or RAM, and a timer 24 for timekeeping, and is built in the housing 2 (see FIG. 1).

The motor 6, the clutch 7, the water supply valve 14, and the drain valve 16 are each electrically connected to a microcomputer 21 via a drive circuit 25, for example, and the display operation unit 11 is also electrically connected to the microcomputer 21. The microcomputer 21 turns on the motor 6 to drive it, turns off the motor 6 to stop it. The microcomputer 21 can also control the rotation direction of the motor 6. Therefore, the motor 6 can rotate forward or backward. The microcomputer 21 controls the clutch 7 to switch the transmission destination of the driving force of the motor 6 to one or both of the washing tub 4 and the pulsator 5. The microcomputer 21 controls the opening/closing of the water supply valve 14 and the drain valve 16. When the user operates the display operation unit 11 to select operating conditions and the like, the microcomputer 21 accepts the selection. The microcomputer 21 controls the display content 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 generates a predetermined sound from the buzzer 26 to notify the user of the start and end of the washing operation.

The rotation speed reading device 27 functions as an example of a detection unit. The rotation speed reading device 27 is a device that reads the rotation speed of the motor 6, strictly speaking, the rotation speed of the output shaft 19 of the motor 6, and is constituted 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 duty ratio of the voltage applied to the motor 6 based on the input rotation speed, thereby controlling the motor 6 to rotate at a desired rotation speed. It should be noted that the respective 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 a value obtained by multiplying a predetermined constant such as the reduction ratio of the clutch 7 and the rotation speed of the motor 6.

The water level detecting unit 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 detecting 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 used.

The microcomputer 21 executes the washing operation by controlling the operation of the motor 6, the clutch 7, the water supply valve 14, and the drain valve 16. The washing operation includes a washing process of washing the laundry Q, a rinsing process of rinsing the laundry Q after the washing process, and a dehydration process of spinning the washing tub 4 after the rinsing process to spin the laundry Q. It should be noted that the vertical washing machine 1 may also be an integrated washer-dryer that also performs a drying process of drying the laundry Q after the dehydration process. In this embodiment, the rinsing process is performed twice, the first rinsing process is called the first rinsing process, and the second rinsing process is called the second rinsing process.

When the user puts the laundry Q into the washing tub 4 and instructs to start the washing operation, the microcomputer 21 starts the washing operation. It should be noted that the user can also put the detergent into the washing tub 4 before and after the washing Q is put in. Referring to the flowchart of FIG. 3, first, the microcomputer 21 detects the amount of laundry Q in the 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 by fluctuations in the rotation speed of the motor 6 when the washing tub 4 is stably rotated at a low speed. The microcomputer 21 determines the water level W (refer to FIG. 1) at which water is to be stored in the washing tub 4 for the next water supply based on the load amount detected just now. The relationship between the water level W and the load is obtained in advance through experiments or the like and stored in the memory 23.

Then, as a water supply process as part of the cleaning process, the microcomputer 21 keeps the water supply valve 14 open to supply water to the washing tub 4 (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 just determined, the microcomputer 21 closes the water supply valve 14 to stop the water supply. Thus, the water supply process ends.

Next, in a state where water is stored in the washing tub 4, the microcomputer 21 executes a stirring process. Specifically, the microcomputer 21 switches the clutch 7 as necessary to transmit the driving force of the motor 6 to the pulsator 5, and then drives the motor 6 to rotate the pulsator 5 (step S3). The pulsator 5 can continue to rotate in the same direction, but in the present embodiment, the intermittent drive of the motor 6 causes the pulsator 5 to reversely rotate forward and backward alternately at intervals of 1 to 2 seconds. In the stirring process, the laundry Q in the washing tub 4 is stirred and washed by the reversed pulsator 5. It should be noted that the pulsator 5 can also be rotated in the water supply process in step S2, and thus the detergent is easily dissolved in water. The dirt of the laundry Q is decomposed by the detergent dissolved in water. When the predetermined stirring time has elapsed, the microcomputer 21 ends the stirring process.

The microcomputer 21 detects the load amount of the laundry Q containing water in the washing tub 4 by the water supply process during the stirring process. As an example of the load detection here, the microcomputer 21 rotates the pulsator 5 carrying the laundry Q for a predetermined period of time, then stops the driving of the motor 6 and causes the motor 6 to inertially rotate, which is read by the rotation speed reading device 27 Calculate the inertial rotation amount of the motor 6 at this time using a known method. The inertial rotation amount of the motor 6 is an index indicating the amount of load. The larger the load, the smaller the amount of inertia rotation of the motor 6 connected to the pulsator 5 carrying heavier laundry Q. The smaller the load, the greater the amount of inertia rotation of the motor 6 connected to the pulsator 5 carrying the lighter laundry Q. The microcomputer 21 detects the amount of load based on the magnitude of the inertial rotation speed. The detected load amount is temporarily stored in the memory 23.

After the stirring process, the microcomputer 21 then executes the spreading process with water stored in the washing tub 4 (step S4). In the spreading process, the microcomputer 21 intermittently drives the motor 6 under conditions different from the stirring process to reverse the pulsator 5. In this embodiment, as an example, the pulsator 5 alternately repeats forward and reverse rotations at intervals shorter than 0.5 seconds during the stirring process, and reverses at a rotation speed higher than that during the stirring process. As a result, the laundry Q immersed in water in the washing tub 4 is spread out by the reversed pulsator 5. Therefore, the bias of the laundry Q is eliminated. The bias of the laundry Q refers to the bias of the laundry Q in the washing tub 4, and is also called imbalance. When the predetermined spreading time has elapsed, the microcomputer 21 ends the spreading process and executes the barrel rotation process (step S5).

Referring to the flowchart of FIG. 4, as the tub rotation processing, first, the microcomputer 21 switches the clutch 7 to transmit the driving force of the motor 6 to the washing tub 4 (step S51). Next, the microcomputer 21 confirms whether the water level in the washing tub 4 has reached a predetermined tub rotation water level (step S52). The bucket rotation water level refers to the water level at which the water in the outer tub 3 will not overflow from the inlet and outlet 3D after the washing tub 4 is rotated next, for example, it is higher than half of the inner height of the washing tub 4. When the water level in the washing tub 4 does not reach 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. Therefore, the microcomputer 21 opens the drain valve 16 to perform the cleaning of the washing tub 4 Drain (step S53).

When the water level in the washing tub 4 reaches the tub rotation water level (Yes in step S52), the microcomputer 21 confirms whether the amount of load detected in the stirring process in step S3 is large (step S100). If it is more than the specified value, the load is large, and if it is less than the specified value, the load is small. For example, when laundry Q corresponding to 70% or more of the rated capacity of the washing tub 4 (for example, 7 kg or more) is stored in the washing tub 4, the load amount is greater than or equal to a predetermined value. If the load is large ("Yes" in step S100), the microcomputer 21 executes the drainage process (step S101), and thereafter, the motor 6 is turned on and rotated (step S54). If the load is small (No in step S100), the microcomputer 21 rotates the motor 6 without performing the drainage process (step S54).

As the draining process in step S101, the microcomputer 21 opens the drain valve 16 for a predetermined time to lower the water level in the washing tub 4. If the barrel rotation water level reached in step S52 is referred to as the "first barrel rotation water level" as a reference, the water level after drainage treatment is the "second barrel rotation water level", which is lower than the first barrel rotation water level. When the load is less than the predetermined value, the first bucket rotating water level is used, and when the load is more than the predetermined value, the second bucket rotating water level is used.

In such a state that the water level in the washing tub 4 reaches the first or second tub rotation water level according to the load, the microcomputer 21 rotates the motor 6 in step S54, thereby storing water in the first or second tub The washing tub 4 of the rotating water level rotates at a high speed, for example, 200 rpm. In this way, a vortex is generated in the outer tub 3, and the water surface S is bent into a U shape (see the two-dot chain line in Fig. 1) such that the central portion on the axis J side becomes lower and the outer peripheral portion becomes higher. Thus, 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 rising water passes through between the ribs 3G arranged on the lower surface of the annular wall 3C of the outer tub 3 and falls while spirally turning, and pours into the washing tub 4 from the inlet and outlet 4D of the washing tub 4 (refer to FIG. 1 and the thick double-dot chain line in Figure 5). It should be noted that 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 inlet and outlet 4D (refer to FIG. 1).

Even if the amount of laundry Q is so large that it quickly emerges from the surface of the water after the water supply process, the water spray from the upper side Z1 realized by the rotation of the washing tub 4 can reliably wash the laundry Q on the side of the inlet and outlet 4D. . Moreover, if washing is achieved by sprinkling water, damage to the laundry Q can be reduced. It should be noted that the tub rotation process may be performed only when the amount of laundry Q is larger than a predetermined amount of washing.

In the state where the bias of the laundry Q has been eliminated in advance by the spreading process in step S4, the tub rotation processing is started. Therefore, in the tub rotation processing, the rotation speed of the washing tub 4 is smoothly increased to the rotation speed for starting sprinkling. As a result, the barrel rotation process can be smoothly performed. In addition, through the spreading process performed in advance, abnormal vibration of the washing tub 4 is not easily generated during the tub rotation processing. Therefore, it is not implemented as much as possible to stop the rotation of the washing tub 4 according to the abnormal vibration to eliminate the laundry Q in the washing tub 4 The treatment of bias can be completed. As a result, the washing time can be shortened.

In the tub rotation processing, the microcomputer 21 detects the so-called eccentric load, which is the magnitude of the eccentricity of the laundry Q in the washing tub 4, in a state where water is subsequently stored in the washing tub 4 (step S55). Specifically, when the deviation of the laundry Q becomes larger, the fluctuation of the rotation speed of the motor 6 becomes larger. Therefore, the microcomputer 21 detects the deviation of the laundry Q in the washing tub 4 by reading the fluctuation of the rotation speed of the motor 6 with the rotation speed reading device 27. In this case, compared with the case where the washing tub 4 is drained first and then the magnitude of the bias of the laundry Q is detected, the time can be shortened. It should be noted that the magnitude of the bias of the laundry Q can also be detected by other well-known methods. When the deviation of the laundry Q is greater than a predetermined size, it may affect the smooth rotation of the washing tub 4.

In the case where a deviation of a predetermined magnitude or more is not detected ("No" in step S55), when the predetermined barrel rotation time has elapsed since the motor 6 in step S54 starts to rotate ("Yes" in step S56), The microcomputer 21 stops the motor 6 to end the barrel rotation process (step S57).

When the microcomputer 21 detects a bias of a predetermined magnitude or more in the barrel rotation processing ("Yes" in step S55), it confirms whether the bias measurement is the first bias measurement in the barrel rotation processing (step S55). S58). The number of detections of the bias in the barrel rotation process this time is temporarily stored in the memory 23.

When the bias is detected this time for the first time (Yes in step S58), the microcomputer 21 stops the motor 6, thereby suspending the rotation of the washing tub 4 (step S59). Then, the microcomputer 21 switches the clutch 7 to transmit the driving force of the motor 6 to the pulsator 5, for example, reverses the pulsator 5 under the same conditions as the spreading process of step S4, thereby turning the washing tub 4 The laundry Q inside is spread out (step S60). At this time, water is already stored in the washing tub 4 and the laundry Q is immersed in the water to be easily spread. Therefore, there is no need to supply water for spreading the laundry Q. It should be noted that, in order to spread the laundry Q, the microcomputer 21 may rotate the washing tub 4 instead of the rotation of the pulsator 5, or may rotate both the washing tub 4 and the pulsator 5. In addition, the washing tub 4 and the pulsator 5 may only be rotated in the same direction, or may be reversed as described above.

After the laundry Q is spread for a predetermined time, the microcomputer 21 switches the clutch 7 to transmit the driving force of the motor 6 to the washing tub 4, and then resumes the rotation of the washing tub 4 (step S54). That is, when the bias is detected for the first time in the tub rotation processing, the rotation of the washing tub 4 is restored after the bias is eliminated by spreading. Thereby, even if the tub rotation processing is resumed without suspending the tub rotation processing to eliminate the bias of the laundry Q, the tub rotation processing can be continued, and therefore, the washing time can be further shortened. On the other hand, if the deviation in the barrel rotation process this time is measured for the second time or more (NO in step S58), the microcomputer 21 stops the motor 6 to stop the barrel rotation process (step S57).

When the barrel rotation process ends or is suspended as described above, the washing process ends. Then, referring to Fig. 3, as in step S100, the microcomputer 21 confirms whether the amount of load detected in the stirring process in step S3 is large (step S102). If the load is large (Yes in step S102), the microcomputer 21 executes the intermediate dehydration process (step S6) after executing the spreading process (step S103). As the spreading process in step S103, the microcomputer 21 switches the clutch 7 to transmit the driving force of the motor 6 to the pulsator 5, for example, reverses the pulsator 5 under the same conditions as the spreading process of step S4. , Thereby spreading the laundry Q in the washing tub 4. If the load is small (No in step S102), the microcomputer 21 executes the intermediate dehydration process without executing the spreading process (step S6).

As an intermediate dehydration process, the microcomputer 21 switches the clutch 7 as necessary to transmit the driving force of the motor 6 to the washing tub 4, and rotates the washing tub 4 at a high speed with the drain valve 16 opened (step S6). The centrifugal force generated by this high-speed rotation causes the laundry in the washing tub 4 to be dehydrated. The water seeping out from the laundry due to dehydration is discharged from the drain 15 to the outside of the machine. In the final stage of the intermediate dehydration process, the microcomputer 21 stops the rotation of the washing tub 4 through a brake (not shown) after stopping the motor 6 to cause the washing tub 4 to inertially rotate. At the end of the intermediate dehydration process, the microcomputer 21 closes the drain valve 16.

Next, as the first rinsing process, the microcomputer 21 performs shower rinsing (step S7). Specifically, the microcomputer 21 intermittently opens the water supply valve 14 with the drain valve 16 closed, thereby spraying water into the washing tub 4. In this state, the microcomputer 21 rotates the washing tub 4 at a low speed of, for example, 30 rpm to spray all corners of the laundry Q. As a result, the laundry Q in the washing tub 4 is rinsed in all directions. After that, the microcomputer 21 executes the same intermediate dehydration process as in step S6 (step S8). It should be noted that each intermediate dehydration process can be regarded as a part of the processing in the subsequent rinsing process.

Next, the microcomputer 21 executes the second rinsing process. The content of the second rinsing process is the same as the cleaning process except that there is no detergent. Specifically, the microcomputer 21 performs water supply as in step S2 (step S9), stirs and rinses the laundry Q as in step S3 (step S10), and spreads the laundry Q as in step S4 ( Step S11), the barrel rotation process is executed in the same way as step S5 (step S12).

Finally, the microcomputer 21 executes the same final dehydration process as the intermediate dehydration process (step S13). However, the rotation condition of the washing tub 4 may be different from the intermediate dehydration process and the final dehydration process. In particular, the maximum rotation speed of the washing tub 4 in the final dehydration process is higher than the maximum rotation speed of the washing tub 4 in the intermediate dehydration process. As the final dehydration process ends, the washing operation ends.

As described above, when the load of the laundry Q containing water is greater than or equal to the predetermined value (YES in step S100), the microcomputer 21 performs the rotation of the washing tub 4 in the tub rotation process (step S5) ( In the drainage process of step S101 before steps S54 to S57), a part of the water in the outer tub 3 is discharged, thereby reducing the water level in the washing tub 4. Thereby, in the state just before the rotation of the washing tub 4 is started, the laundry Q in the washing tub 4 can be sunk in advance so as to be away from the inlet and outlet 4D. Therefore, the laundry Q can be prevented from coming out of the washing tub 4 from the inlet and outlet 4D during the subsequent rotation of the washing tub 4.

In addition, when the load amount of the laundry Q is greater than or equal to the predetermined value (Yes in step S102), the microcomputer 21 performs the spreading process in step S103 immediately after the tub rotation process (step S5). The pulsator 5 rotates, thereby spreading the laundry Q in the washing tub 4. As a result, the laundry Q in the washing tub 4 can be sinked and moved away from the inlet and outlet 4D. Therefore, even when the laundry Q in the washing tub 4 approaches the inlet and outlet 4D during the tub rotation process, the spreading process performed immediately after the barrel rotation process prevents the laundry Q from going to the washing tub from the inlet and outlet 4D. 4 came out.

In this way, the drainage process of step S101 and the spreading process of step S103 are emission suppression processes for suppressing the emergence of the laundry Q from the inlet and outlet 4D of the washing tub 4 to the outside of the washing tub 4. The emission suppression treatment can suppress the laundry Q from emitting out of the washing tub 4 from the inlet and outlet 4D due to the tub rotation treatment.

In the present embodiment, when the load amount of the laundry Q is greater than or equal to the predetermined value, both before and after the rotation of the washing tub 4 in the tub rotation processing (step S5), the emission suppression processing is performed, but the emission The suppression process may be executed at least at any one of the timing before and after the rotation of the washing tub 4 in the tub rotation processing (step S5). In addition, in this embodiment, the emission suppression processing is performed before and after the rotation of the washing tub 4 in the tub rotation processing (step S5) of the washing process, but the emission suppression processing may also be performed during the tub rotation of the second rinsing process. At least one of before and after the rotation of the washing tub 4 in the processing (step S12) may be executed. In the case where the emission suppression processing is executed before the rotation of the washing tub 4 in the tub rotation processing (step S12), between the processing of step S52 and the processing of step S54 in the tub rotation processing, steps S100 and S54 are executed. 101 the same treatment. In the case where the emergence suppression processing is executed immediately after the barrel rotation processing (step S12), the same processing as steps S102 and 103 are executed between the barrel rotation processing (step S12) and the final dehydration process (step S13).

Regarding the barrel rotation processing, in addition to the first embodiment described above, a second embodiment can be exemplified. Fig. 6 is a flowchart showing the barrel rotation processing of the second embodiment. It should be noted that, in FIG. 6, among the processing steps that are the same as the processing steps in FIG. 4, the same step numbers as in FIG. 4 are assigned, and detailed descriptions of the processing steps are omitted.

In the second embodiment, when the microcomputer 21 detects a deviation of a predetermined magnitude or more in the tub rotation processing (YES in step S55), it 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 to transmit the driving force of the motor 6 to the pulsator 5 and rotates the pulsator 5, thereby stirring the laundry Q in the washing tub 4 (step S62). In this way, the washing method is changed from the rotation of the washing tub 4 to the stirring of the pulsator 5 to continue washing the laundry Q. Therefore, the laundry Q can be washed to the same extent as the case where the rotation of the washing tub 4 is continued during the tub rotation process.

Furthermore, when the laundry Q is stirred for a predetermined time, the microcomputer 21 changes the driving conditions of the motor 6, thereby spreading the laundry Q in the washing tub 4 with the pulsator 5 under the same conditions as the spreading process of step S4. ON (step S63). When the laundry Q is spread out for a predetermined time, the microcomputer 21 stops the motor 6 to end the tub rotation process (step S57). Through the spreading in step S63, it is possible to prevent abnormal vibration when the washing tub 4 rotates at a high speed during the subsequent dehydration process and the like.

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

For example, although the stirring process, the spreading process, and the barrel rotation process are performed in both the washing process and the second rinsing process in the above embodiment, they can also be performed only in one of the cleaning process and the second rinsing process, or in the Performed during the first rinsing process. In the tub rotation process (step S5) in the washing process and the tub rotation process (step S12) in the second rinsing process, the content may be the same as described above, or may be different. In the case of different contents, it may be that the content of the barrel rotation process (step S5) in the washing process is one of the first embodiment and the second embodiment, and the barrel rotation process (step S12) in the second rinsing process The content is the other of the first embodiment and the second embodiment.

In the barrel rotation processing of the first embodiment, when a deviation of a predetermined magnitude or more is detected two or more times (NO in step S58), the microcomputer 21 immediately suspends the barrel rotation processing (step S57). Alternatively, the microcomputer 21 may stop the motor 6 (step S61) and switch the clutch 7, and then reverse the pulsator 5 to stir or spread the laundry Q in the washing tub 4 (step S62) (step S63), and then The barrel rotation process is terminated (step S57). That is, it is also possible to combine a part of the second embodiment with the first embodiment.

The axis J of the washing tub 4 in the vertical washing machine 1 is arranged to extend vertically along the vertical direction Z in the above-mentioned embodiment (see FIG. 1), but the vertical washing machine 1 also includes the axis J relative to the vertical direction Z The structure is slightly inclined.

Claims

A vertical washing machine, characterized in that it comprises:

The outer bucket can store water;

Drive unit to generate driving force;

The washing tub is arranged in the outer tub, contains laundry, has a through hole for passing water between the washing tub and the outer tub, has an inlet and outlet for the laundry at the upper end, and a bottom wall at the lower end , The washing tub is rotated by receiving the driving force of the driving unit;

The rotating wing is arranged on the bottom wall in the washing tub and rotates by receiving the driving force of the driving unit;

A water supply unit to supply water to the washing tub;

A control unit that controls the drive unit and the water supply unit; and

The detection unit detects the load of the laundry in the washing tub,

The control unit performs the following processing in at least any one of the cleaning process and the rinsing process after the cleaning process:

In a stirring process, in a state where water is stored in the washing tub by the water supply unit, the rotating wing is rotated by the driving unit, thereby stirring the laundry in the washing tub;

Spreading process, after the stirring process, in the state of storing water in the washing tub, the rotating wing is rotated by the driving unit, thereby spreading the laundry in the washing tub ;as well as

Barrel rotation processing, after the spreading process, the washing tub stored with water is rotated by the drive unit, thereby causing the water in the outer tub to be between the outer tub and the washing tub The laundry that rises and is poured into the washing tub from the inlet and outlet,

In a case where the detection unit detects a load amount greater than a predetermined value, the control unit executes a method for suppressing laundry at least one of before and after rotation of the washing tub in the tub rotation Emerging from the entrance and exit to the outside of the washing tub is suppressed.
The vertical washing machine according to claim 1, wherein:

As the emergence suppression processing, the control unit rotates the rotary wing through the drive unit immediately after the tub rotation processing, thereby spreading the laundry in the washing tub.
The vertical washing machine according to claim 1 or 2, characterized in that:

It also includes a drainage unit that drains the water in the outer tub,

As the emergence suppression processing, the control unit drains a part of the water in the outer tub through the drainage unit on the eve of the rotation of the washing tub in the tub rotation processing.