JP2018157958A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To wash normal laundry after washing things such as minute muddy dirt adhering to the inside of the tub after washing, or things which should not be washed with ordinary laundry (toilet mat, pet towel, etc.) It is an object of the present invention to provide a washing machine that can reduce the amount of water used and wash the inside of a tub in a short time when there is resistance at the time. SOLUTION: A casing, an outer tub that is vibration-isolatedly supported in the casing and stores therein washing water, and a washing / dehydrating tub that is rotatably supported in the outer tub and stores laundry. A washing device for rotating the washing / dehydrating tub, a water supply unit for supplying washing water to the washing / dehydrating tub, and a drainage unit for draining the washing water in the washing / dehydrating tub to wash, rinse, and dehydrate In the washing machine including control means for controlling the execution of each step, the control means executes an in-tub cleaning course for cleaning the inside of the washing / dehydrating tank. [Selection diagram] Fig. 6

Description

  The present invention relates to a washing machine having a vertical and drum type washing and drying machine and a tank washing control of a fully automatic washing machine.

  There are things that you want to wash separately from normal laundry, such as toilet mats and kitchen mats (those that do not wash frequently unlike normal laundry) and towels and clothes for pets. Furthermore, after washing them, there are those who feel resistance to continuously washing ordinary laundry, and among them, there are those who wash the tub and then wash ordinary laundry.

  In that case, if you try to pour water into the tub with a bucket or hose, the water may jump out or drown out of the washing tub and wet the floor. While washing with water, or feeling resistance, the usual laundry is washed as it is.

  Conventionally, as disclosed in Document 1 (Japanese Patent Laid-Open No. 2004-141344), an outer tub and an inner tub that is rotatably supported inside the outer tub are provided, and laundry and washing liquid are put together inside the inner tub. After washing operation, draining operation to drain the washing liquid from the inside and outside of the tub, rinsing operation to wash the laundry after draining operation, and rotating the inner tub after rinsing operation There is a course to clean the washing tub in a washing machine that performs a dehydration operation in which the moisture of the laundry is shaken by centrifugal force.

  In addition, in a coin-operated fully automatic washing machine, if you select the step of washing the inside of the tub by pressing a button within 10 seconds after inserting the coin, the shower basin is rotated for about 20 seconds and the washing tub is washed (required time) : About 50 seconds), after which the lock is released and the laundry and detergent are put into the laundry.

JP2004-141344

  The washing machine cleans everything, so there are some people who don't mind even if they wash all together, but those who want to wash the toilet mat and towel, and those who want to wash the towel and socks separately, Some people do not want to wash together, such as pet towels and human towels, and there are many different ways to separate them. Furthermore, among those who wash toilet mats and normal laundry separately, it is not a problem to wash the toilet mat after washing the normal laundry, but it is normal for the washing machine after washing the toilet mat. Some people feel reluctant to throw in laundry. If you want to wash your mood even if the tank is not actually dirty, or if you want to wash it quickly after removing the dirt and hair from the toilet mat in the tank and removing it with tissue paper There is.

  At present, it doesn't really get dirty for things that feel like it is, but it feels a little resistance, but it doesn't take any action. In some cases, after washing the tank with water and dehydrating, the next washing is performed. Moreover, it is possible to cope with actual dirt by wiping with tissue paper, pouring water to drain the dirt and draining, or washing the tank with water.

  For existing courses for washing the tank, if it is determined that the required time is too long, it must be set manually. At that time, in the current operation, it is impossible to wash the tank wall unless water is stored, and when water is added to a high water level, it takes a lot of water and also takes time to store water.

  Also, as the function of washing the tub is installed in the current coin laundry, the method of choosing to execute before washing is done, the coin laundry used by an unspecified number of people put their laundry Before washing, it is effective to wash the tub where it is unknown what kind of laundry was washed, and then add the laundry and detergent, but the washing machine in each home is not necessarily just before washing There is no need to wash the tub, and it is more convenient to wash the tub after washing things that appear to be more dirty than normal laundry. Further, it is desirable for each person to decide whether or not to perform bath washing, and therefore it is desirable to establish the course as one course rather than being incorporated into the washing cycle.

  The present invention solves the above-mentioned problems. After washing laundry (such as toilet mats) that is soiled or does not want to be washed with ordinary laundry in a short time with a little water, The tank is washed.

  As an example, the present invention includes a housing, an anti-vibration support in the housing, an outer tub that stores washing water therein, and a laundry that is rotatably supported in the outer tub and stores laundry. A washing / dehydrating tub, a drive device for rotating the washing / dehydrating tub, water supply means for supplying washing water to the washing / dehydrating tub, and drainage means for draining washing water from the washing / dehydrating tub. In the washing machine including control means for controlling the execution of the rinsing and dehydration steps, the control means executes an in-bath cleaning course for cleaning the inside of the washing and dehydrating tank.

  According to the present invention, when dirt such as minute mud is actually attached to the tub, or when a person feels resistance to throwing in normal laundry after using the washing machine with a toilet mat or the like that is not frequently washed. The inside of the tank can be washed with a simple operation. Furthermore, the amount of water used can be reduced, and washing can be performed in a relatively short time.

It is an external appearance perspective view of the washing machine (washing dryer) concerning this embodiment. FIG. 2 is a right side sectional view showing a part of a housing and an outer tub cut out in order to show an internal structure of the washing machine (washing / drying machine) shown in FIG. 1. FIG. 3 is a block diagram of a control system of the washing machine (washing / drying machine) shown in FIG. 2. It is a flowchart of the control processing which the microcomputer in the controller of the control system shown in FIG. 3 performs. It is an operation panel in the washing machine (washing dryer) of a present Example. FIG. 3 is a diagram illustrating the tank rotation speed and the water supply timing for the tank washing operation of the washing machine (washing and drying machine) shown in FIG. 2. The water supply timing shown in FIG. 6 shows that the water supply method is changed in accordance with the flow rate in each household in order to stabilize the amount of water used and the level of dirt removal. It is right side sectional drawing which cut and showed a part of housing | casing and the outer tub in order to show the internal structure of a fully automatic washing machine. FIG. 9 is a diagram illustrating the tank rotation speed and the water supply timing for the tank washing operation of the fully automatic washing machine shown in FIG. 8. FIG. 10 illustrates a case where dehydration is performed after the operation of FIG. 9 with the intention of reducing water droplets in the tank.

  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 present description, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted.

  Of the vertical and drum type washing / drying machines and the fully automatic washing machine, the vertical type washing / drying machine will be described here.

  FIG. 1 is an external perspective view of a washing machine (washing / drying machine) according to the present embodiment, and FIG. 2 is a right side sectional view showing a part of a housing and an outer tub cut out in order to show an internal structure. It is.

  The washing / drying machine 1 is a vertical washing / drying machine in which the rotation axis of the washing / dehydrating tub 8 is substantially vertical. An upper surface cover 2a is provided on the upper portion of the housing 2 of the washing / drying machine 1, and an outer lid 3 is provided on the upper surface cover 2a. The outer lid 3 is bent in a mountain shape and opened to the rear side, thereby opening the opening 2 b and allowing clothes (laundry) to be taken in and out of the washing and dehydrating tub 8. Moreover, while the outer lid 3 is closed during washing, at least when the washing and dehydrating tub 8 is rotating or when the inside is hot during drying, the user should not accidentally open the outer lid 3. A lock mechanism (not shown) for the outer lid 3 is provided. A water supply hose connection port 4 from the water tap and a water absorption hose connection port 5 for remaining hot water in the bath are provided on the back side of the upper surface cover 2a. A power switch 6 is provided on the front side of the top cover 2a, and an operation display panel 7 including an operation switch group 7a and a display 7b is provided on the front side of the outer lid 3. The operation display panel 7 is electrically connected to a control device 100 provided at the lower part of the housing 2.

  The bottomed cylindrical washing and dewatering tub 8 is rotatably supported by the outer tub 9 and has a large number of through holes 8b for water flow and ventilation on its outer peripheral wall 8c, and the upper side is open. And an annular fluid balancer 8d at the upper end. The outer tub 9 has a disk-shaped bottom wall portion 9d and a cylindrical peripheral wall portion 9e and is formed in a bottomed cylindrical shape. The outer tub 9 encloses the washing / dehydrating tub 8 on the same axis and is open on the upper side. . In addition, a tank cover 9b is provided at the upper part of the outer tank 9, and has an opening 2b at the approximate center thereof, and an inner lid 9a is provided so as to cover the opening 9f. The user of the washing / drying machine 1 can put clothes in and out of the washing and dewatering tub 8 through the openings 2b and 9f by opening the outer lid 3 and the inner lid 9a.

  A rotary blade 8 a is provided on the inner bottom surface of the washing and dewatering tub 8. A convex stirring rib is formed on the upper surface of the rotary blade 8a. In addition, a driving device 10 is provided at the outer center of the bottom surface of the outer tub 9. The driving device 10 includes a motor 10a and a clutch mechanism 10b, and a rotating shaft 10c of the driving device 10 passes through the outer tub 9 and is coupled to the washing / dehydrating tub 8 and the rotary blade 8a. The clutch mechanism 10b transmits the rotational power of the motor 10a to the washing and dewatering tub 8 and the rotary blade 8a in the dewatering mode, and rotates the rotational power of the motor 10a with the washing and dewatering tub 8 fixed or freely rotated in the stirring mode. It transmits to the wing | blade 8a. The motor 10a includes a rotation sensor 28 configured by a Hall element or a photo interrupter that detects the rotation, and a motor current sensor 29 that detects a current flowing through the motor 10a.

  The detergent / finishing agent charging device 11 is provided on the front side of the top cover 2a. The detergent and finish are passed between the outer tub 9 and the washing / dehydrating tub 8 through the charging hose 11a. The water supply unit 12 is provided on the back side of the top cover 2a. The water supply unit 12 includes a water supply box having a plurality of water passages therein, and a tank water supply electromagnetic valve, a detergent water supply electromagnetic valve, a finishing agent water supply electromagnetic valve, and a cooling water supply water electromagnetic valve connected to each water channel, Tap water from the water supply hose connection port 4 is supplied to the washing / dehydrating tank 8, the detergent / finishing agent input device 11, and a water-cooled dehumidifying mechanism (not shown) to be described later. Further, a bath water absorption pump (not shown) is connected to the water absorption hose connection port 5 so that the bath water can be poured into the washing and dewatering tub 8 through the water injection hose 11b. Tap water from the tank water supply electromagnetic valve passes through the water injection hose 11b and is supplied into the washing and dewatering tank 8 from a water supply port 9g provided in the tank cover 9b. The water supply port 9g is located behind the opening 9f of the tank cover 9b, and the water from the water supply port 9g falls to the outer peripheral side of the rotor blade 8a by gravity. Further, tap water from the detergent water supply solenoid valve is supplied to the detergent charging chamber of the detergent / finishing agent charging device 11 through the water supply hose 12i. Tap water from the finishing agent water supply solenoid valve is supplied to the finishing agent input chamber of the detergent / finishing agent input device 11 through the water supply hose 12j.

  A drop portion 9 c provided on the bottom surface of the outer tub 9 is connected to communicate with the lower communication pipe 13. The lower communication pipe 13 is connected so as to communicate with the washing water drainage path 15 via the drain valve 14. By closing the drain valve 14, washing water and rinsing water can be stored in the outer tub 9. Further, by opening the drain valve 14, the water in the outer tub 9 can be drained outside the washing / drying machine 1 through the washing water drainage channel 15.

  The outer tub 9 is provided with a pneumatic chamber 25a, and a water level sensor 25 for detecting the water level of the washing water stored in the outer tub 9 is provided on the upper side thereof. Between the lower communication pipe 13 and the drain valve 14, a temperature sensor 26c for detecting the temperature of the washing water is provided. An acceleration sensor 27 that detects vibration acceleration due to vibration of the outer tub 9 is provided on the upper side of the outer tub 9.

  The operation switch group 7a of the operation display panel 7 includes a course setting switch for setting the type of operation (washing / drying) to be executed and a mode setting switch for setting the execution method of washing and drying according to the laundry. The course setting switch is equipped with an operation switch for selectively setting the washing course, drying course, and washing / drying course, and the mode switch is an operation switch for selectively setting the standard mode, the handmade mode, the forging mode, etc. Is provided. In addition, an operation switch for setting the amount of water to be washed, time, number of times of rinsing, and dehydration time, and an operation switch for setting a special operation mode such as hot water washing are provided. Furthermore, a start switch that is operated at the start of the operation to be performed is provided.

  The display 7b of the operation display panel 7 displays the contents set by the operation switch group, and includes a display for displaying the course to be executed, the mode, the amount of water, the time, the number of times, the remaining time of the washing course, and the like. .

  FIG. 3 is a block diagram of the control device 100 of the washing / drying machine of the present embodiment. A microcomputer 70 is connected to the operation button input circuit 71, the water level sensor 25, the temperature sensors 26a, 26b, and 26c, the acceleration sensor 27, the rotation sensor 28, and the motor current sensor 29 connected to each operation switch group 7a. Various information signals are received in the user's button operation, washing process, and drying process. The output from the microcomputer 70 is connected to a drive circuit 74 and connected to a water supply unit 12, a drain valve 14, a circulation pump 17, a motor 10a, a clutch mechanism 10b, a fan 21, a heater 22, and the like. Control energization. Further, it is connected to a 7-segment light emitting diode or a liquid crystal display 7b, a light emitting diode 72, and a buzzer 73 for informing the user of the operating state of the washing machine.

  Next, the operation of the washing course of the washing machine (washing and drying machine) according to this embodiment will be described with reference to FIG.

  Turn on the power, select tank washing (course), and then start the tank washing when the start switch is pressed. The microcomputer 70 is activated when the power switch 6 is pressed, and executes the flow shown in FIG. FIG. 5 is a diagram illustrating a configuration example of the operation display panel 7 of the washing machine (washing / drying machine) according to the present embodiment. As operation buttons, a washing course button 51, a washing / drying course button 52, a drying course button 53, a start / pause button 54, and the like are arranged. When these buttons are pressed, the operation of each mode is started. Is done. Further, every time the washing course button 51 is pressed, the driving course that can be set in the washing course is changed. When the tank washing course 55 is set and the start / pause button 54 is pressed, It is designed to be operated in the tank washing course described in. This tank washing course may be performed alone or in combination with another course so that the other course is completed. In this case, when the tank washing button is provided, the washing button 51 is pressed to set the standard course 56, and the tank washing course 55 is set with the tank washing button, the outer lid 3 and the inner lid 9a are opened after the standard course is finished. After the clothes are taken out, the inner lid 9a is closed, and when it is detected that the outer lid 3 is closed, or when the start / pause button 54 is pressed, the bath washing course is performed.

Step S401
When the power is turned on, the initialization process of the control processing system is performed, and then the initialization control process of the clutch mechanism 10b is performed. Specifically, the clutch mechanism 10b is controlled so that the drive mode is in the stirring mode.

Step S402
The indicator 7b of the operation display panel 7 is turned on, and the tank washing course is set according to the instruction input from the operation switch group 7a. Thereafter, when the start switch is pressed, the bath washing is started.

Step S403
First, the rotating blade 8a on the inner bottom surface of the washing and dewatering tub 8 is driven to rotate to detect the presence or absence of a load in the washing and dewatering tub 8. If it is determined that there is a load, an error is displayed and the operation is not performed. . This is because if clothes are supplied in the washing / dehydrating tub 8 and rotated at a high speed while water is supplied, it tends to become unbalanced and easily become dangerous, and the original purpose of washing the tub cannot be achieved by the load. It is.

  When it is determined that there is no problem in the washing and dewatering tub 8, the process proceeds to the next step.

Step S404
The drain valve 14 is opened. (Due to structural differences, this does not apply to drum-type washing machines)
Step S405
The clutch mechanism 10b is set to the dewatering mode, the motor 10a is energized, and the washing / dewatering tub 8 and the stirring blade 8a are rotated together. The rotational speed is gradually increased. At this time, the tank water supply electromagnetic valve is opened to supply water into the washing and dewatering tank 8. The upper limit of the rotation speed of the washing and dewatering tub 8 is preferably a rotation speed that allows the main body at a level where there is no problem with water splashing. For example, the vertical washing machine provided with the inner lid 9a so as to cover the opening 9f is 1000 r / min, and the fully automatic washing machine without the inner lid 9a is 150 r / min.

Step S406
Before reaching the upper limit of the number of revolutions, the tank water supply electromagnetic valve is closed to stop water supply. The washing and dewatering tub 8 continues to rotate for a certain time after reaching the upper limit of the number of rotations.

Step S407
The energization of the motor 10a is stopped, and the rotation of the washing and dewatering tub 8 is stopped.

Step S408
The washing and dewatering tub 8 is stopped, and the water supply electromagnetic valve in the tub is opened for several seconds when rotating in the reverse direction to supply water into the washing and dewatering tub 8.

Step S409
Next, the washing and dewatering tub 8 is rotated in the opposite direction. At this time, the water is drained from the drain valve 14 while supplying water into the washing and dewatering tub 8 as in step S405.

Step S410
Close the water supply electromagnetic valve in the tank and stop water supply before reaching the rotation speed upper limit. The washing and dewatering tub 8 continues to rotate for a certain time after reaching the upper limit of the number of rotations.

Step S411
The energization of the motor 10a is stopped, and the rotation of the washing and dewatering tub 8 is stopped.

Step S412
The drain valve 14 is closed and the process ends.

FIG. 6 shows the tank washing operation in the vertical washer provided with the inner lid 9a so as to cover the opening 9f. (Excluding no-load judgment operation and mating operation)
When the washing / dehydrating tub 8 rotates, an air flow is generated inside the washing / dehydrating tub 8 or between the washing / dehydrating tub 8 and the outer tub 9. One is the flow in the rotation direction (circumferential direction) of the washing / dehydrating tub 8, and the other is the flow in the vertical direction of the washing / dehydrating tub 8. The flow in the vertical direction is generated by the action of a centrifugal fan by the lower surface of the rotary blade 8 a and the washing and dewatering tub 8. In other words, the air in the washing / dehydrating tub 8 flows downward in the center of the washing / dehydrating tub 8 toward the center of the rotating wing 8a so as to be sucked into the rotating wing 8a by the fan action of the rotating wing 8a. It is pushed out to the outer peripheral side, flows upward on the outer peripheral wall 8c of the washing and dewatering tub 8, and circulates so as to be sucked into the rotary blade 8a again (arrow 41). At this time, a part of the air passes through the through hole 8 b of the outer peripheral wall 8 c of the washing / dehydrating tub 8 and flows between the outer peripheral surface of the washing / dehydrating tub 8 and the inner peripheral surface of the outer tub 9. Further, a part of the air toward the center of the rotary blade 8 a passes through a large number of small holes for draining provided in the rotary blade 8 a by the fan action on the lower surface of the laundry and dewater tank 8. It flows into the gap between the lower surface and the bottom surface of the outer tub 9, and flows between the outer peripheral surface of the washing and dewatering tub 8 and the inner peripheral surface of the outer tub 9. Then, it flows upward through this gap while joining with the flow from the through hole 8b, hits the tank cover 9b, and circulates so as to be sucked into the rotary blade 8a from the approximate center of the washing and dewatering tank 8 (arrow 42). The air flow rate increases as the rotational speed of the washing and dewatering tub 8 increases.

  The washing and dewatering tub 8 performs a left rotation after a right rotation. The maximum number of revolutions is 1000 r / min, and water supply is performed when the number of revolutions is increased on both the left and right sides. The start and stop timings of water supply are set until the rotational speed of the washing and dewatering tub 8 reaches from 0 r / min to 800 to 900 r / min. When the washing and dewatering tub 8 is stopped, the water discharged from the water supply port 9g falls on the surface near the outer peripheral side of the rotary blade 8a, and a part of the jumped water wets the lower part of the outer peripheral wall 8c. As the number of rotations of the washing and dewatering tub 8 is increased, this jumping becomes intense, and water reaches a wide area of the outer peripheral wall 8c. Furthermore, as described above, the water is rolled up by the air flowing upward along the outer peripheral wall 8c. As the rotational speed of the washing and dewatering tub 8 increases, the water reaches a higher position on the outer peripheral wall 8c. In the present embodiment, the rotational speed of the washing and dewatering tub 8 is set to 800 to 900 r / min, but this is for spreading the water uniformly to the upper part of the outer peripheral wall 8c. In addition, the higher the rotation speed, the stronger the water hitting the outer peripheral wall 8c and the higher the cleaning effect. However, the higher the rotation speed, the greater the amount of water used, the required time, and the amount of power consumption. Therefore, the upper limit of the rotation speed during water supply is set to 800 to 900 r / min. The upper limit of the number of rotations of the tank varies depending on the shape and size of the washing and dewatering tank 8, the depth, the shape of the rotary blade 8, and the like, and it is necessary to make appropriate adjustments depending on the body.

  Thus, the higher the number of rotations, the wider the range of water diffusion, so a higher number of rotations can be said to be advantageous. However, as the number of rotations of the washing and dewatering tub 8 increases, Therefore, it is not preferable to supply water only at a constant rotation speed. It is necessary to start water supply at 0 r / min in order to remove dirt on the pulsator and dirt on the bottom of the tank wall. Further, in order to uniformly spray water in all the places in the washing and dewatering tub 8, it is necessary to supply water while increasing the rotation speed, not just the minimum rotation speed and the maximum rotation speed.

  Note that the rotation speed of the washing and dewatering tub 8 is not decreased immediately after the water supply is stopped, and the energization of the motor 10a is stopped after maintaining the constant rotation speed or increasing the rotation speed. This is because even if the water supply electromagnetic valve in the tank is closed and water supply is stopped, there is residual water in the vicinity of the water supply port and residual water in the washing and dehydrating tank 8, and washing is performed using the residual water. On the other hand, after the remaining water in the washing and dewatering tub 8 has been taken out of the washing and dewatering tub 8, the energization of the motor 10a is stopped and the rotation of the tub is stopped. During the course operation, the drain valve 14 is kept open and the drainage state is always maintained.

  The washing / dehydration tub 8 is rotated both clockwise and counterclockwise because the outer peripheral wall 8c has irregularities due to a lint filter or a shower case. This is to cope with remaining dirt even if the water supply time is increased.

  Water is supplied when the tank rotation is increased because the dirt removal is better when the tank is rising than when the water is supplied when the tank is lowered. This is because it remains in the cum dewatering tank 8.

  In addition, when the washing and dewatering tub 8 is shifted from the right rotation to the left rotation, water is supplied. As a result, a large amount of water is splashed on the pulsator, and the movement of the dust on the pulsator is improved. If water supply is started simultaneously with the start of counterclockwise rotation without water supply at this timing, the rotation speed of the washing / dehydrating tub 8 will rise before sufficient water is applied to the pulsator. It will remain.

  Further, by this series of operations, the water discharged from the through-hole 8b provided in the washing / dehydrating tub 8 also cleans the outside of the washing / dehydrating tub 8 and the inside of the outer tub 9, and then the washing water The water is drained out of the washing machine 1 through the drainage channel 15. After performing the drying operation with the washing / drying machine, fine cotton-like lint (dust) generated during drying may adhere to the inner wall surface of the outer tub 9 or the washing / dehydrating tub 8. When the next washing is performed in this state, the waste thread flows into the washing water. Part of the lint that flows out is collected by the lint filter, but may adhere to the clothing and deteriorate the finish of the clothing. The tank washing course can also wash the outside of the washing / dehydrating tub 8 and the inside of the outer tub 9 as described above, so that lint attached to the outside of the outer tub 9 and the washing / dehydrating tub 8 is removed during the drying operation. You can also. Since the waste thread shed in the tank washing course accumulates in the waste thread filter, a display 57 (FIG. 5) that prompts the operation display panel 7 to clean the waste thread filter may be displayed after the tank washing course.

In addition, you may change the water supply method according to water pressure (each flow rate) as shown in FIG. As a result, the amount of water used can be kept within a certain range regardless of the water pressure, and the level of dirt can be kept at a certain level. In households with high water pressure (high flow rate), intermittent water supply is used. By changing the ON time, the amount of water used is kept within the target range, and in households with low water pressure (low flow rate), continuous water supply is used. Try to improve. For the water pressure, use the value calculated from the time required for water supply at the time of rinsing. (If this value is not available for the first time, it can be handled by performing an operation when the flow rate is 9.0 <χ ≦ 12.0L / min.)
The above is an example of the operation of the vertical washer provided with the inner lid 9a so as to cover the opening 9f.

  On the other hand, when water is supplied while rotating the washing / dehydrating tub 8 at a high speed in a fully automatic washing machine without the inner lid 9a, large droplets of water splash around the back side of the outer lid 3 and the laundry inlet of the top cover 2a due to water splashing. (The diameter of about 4 mm or more) may be attached, or the floor surface may be wetted by splashing water droplets outside the outer tub 9. There is a need.

  In the case of a fully automatic washing machine having an inner diameter of the washing / dehydrating tub 8 of about 500 mm and a depth of about 450 mm, by supplying water at a maximum rotation speed of about 150 r / min, the inside of the washing / dehydrating tub 8 is suppressed while suppressing water splashing. It can be washed.

  FIG. 8 is a right side cross-sectional view showing a part of the housing and the outer tub cut away in order to show the internal structure of the fully automatic washing machine. The water supply port 9g is provided on the back side of the laundry input port of the upper surface cover 2a, and water flows down to the inside of the inner peripheral surface of the fluid balancer 8d. When the washing and dewatering tub 8 rotates, it is dragged to the inner peripheral surface of the fluid balancer 8d and a circumferential air flow is generated in the vicinity of the inner peripheral surface. For this reason, the pressure of the gap 8e between the water flowing down from the water supply port 9g and the fluid balancer decreases, and the flow of water is bent in the direction of the fluid balancer. When the washing and dewatering tub 8 is rotated at about 150 r / min, a part of the water flowing down is applied to the inner peripheral surface of the fluid balancer 8d, from which water is transmitted to the outer peripheral wall 8c and flows down along the outer peripheral wall 8c. The remaining water falls near the outer periphery of the upper surface of the rotary blade 8a, cleans the upper surface of the stirring blade 8a, and jumps to wet the lower portion of the outer peripheral wall 8c. The outer peripheral wall 8c can be cleaned with the water flowing down from the upper part of the outer peripheral wall 8c and the splashed water. It is preferable to adjust in accordance with the rotational speed, water supply time, water supply timing, and shape of the water supply port 9g of the washing and dewatering tub 8 so that water can be transmitted evenly to the outer peripheral wall 8c.

  Water supply is performed when the tank rotation speed is increased, as in the above-described vertical washer / dryer. In the case of a vertical washer, the maximum number of revolutions is as high as 800 to 900 r / min. Therefore, water must be supplied in a stopped state (0 r / min) in order to perform washing on the rotary blade 8 a and the lower part of the washing and dewatering tank 8 However, in the case of a fully automatic washing machine with a maximum rotational speed as low as 150 r / min, most of the water discharged from the water supply port 9 g flows down and falls onto the rotary blade 8 a, so that the stopped state and extremely low speed are achieved. Rotating water supply is not necessary. In addition, it is necessary to adjust the number of rotations of the tank at the start and end of water supply in accordance with the structure by judging from both sides of water splashing and dirt removal.

  Also, the water supply method is similar to the vertical washer and dryer, such as intermittent when the water pressure is high, or reducing the water supply time and number of water supply, while continuing the water supply when the water pressure is low, increasing the water supply time and the number of water supply. As a result, the amount of water used is kept within a certain range regardless of the water pressure, and the dirt removal is also kept at a certain level.

  The drain valve 14 remains open during the course operation as in the case of the vertical washer and is always drained.

  FIGS. 6 and 9 show the operation for cleaning the inside of the tank, and since the point is on the cleaning, the dehydration time after the cleaning is as short as possible. For these, there is no problem because the tank is rotated for a certain period of time after the water supply is stopped and dewatered and drained, but for the purpose of further reducing water droplets remaining in the washing and dewatering tank 8 after completion. As shown in FIG. 10, high-speed dehydration may be performed after a series of bath washing operations.

  Further, in any of the vertical type, drum type washer and fully automatic washing machine, the shape of the water supply port for supplying water into the washing / dehydrating tub 8 is changed to the outer periphery of the washing / dehydrating tub 8 in order to improve the washing performance. By making water easily hit the inside of the wall 8c, the inner surface of the washing and dewatering tub 8 can be more efficiently cleaned.

DESCRIPTION OF SYMBOLS 1 Washing dryer 2 Case 3 Outer lid 4 Water supply hose connection port 5 Water absorption hose connection port 7 Operation display panel 8 Washing / dehydration tank 8a Rotary blade 8b Through hole 8c Outer peripheral wall 8d Fluid balancer 9 Outer tank 9a Inner lid 9b Tank cover 9c Drop part 9d Bottom wall part 9e Perimeter wall part (peripheral wall surface)
9f Opening 9g Water supply port 10 Driving device (driving means)
10a Motor 10b Clutch mechanism 10c Rotating shaft 11 Detergent / finishing agent charging device 12 Water supply unit 13 Lower communication pipe 14 Drain valve 15 Washing water drain 17 Circulation pump 20 Drying duct 22 Heater 25 Water level sensors 26a, 26b, 26c Temperature sensor (temperature) Detection means)
27 Acceleration sensor 28 Rotation sensor 29 Motor current sensor 100 Control device (operation control means)

Claims (6)

A housing,
Anti-vibration support in the housing, and an outer tub for storing washing water inside,
A washing and dehydrating tub that is rotatably supported in the outer tub and in which the laundry is stored,
A driving device for rotationally driving the washing and dewatering tub;
Water supply means for supplying washing water to the washing and dehydrating tub and drainage means for draining the washing water of the washing and dehydrating tub,
In a washing machine provided with a control means for controlling the execution of each step of washing, rinsing and dehydration,
The washing machine according to claim 1, wherein the control means executes an in-bath washing course for washing the inside of the washing / dehydrating tub.   The washing machine according to claim 1, wherein the washing course in the tub supplies water to the washing / dehydration tub by the water supply means while rotating the washing / dehydration tub.   The control means accelerates the washing / dehydrating tub to a specified rotational speed in a substantially constant time and rotates it in both the left and right directions, and performs the water supply when the rotation is increased or stopped when the washing / dehydrating tub is stopped. The washing machine according to claim 2.   The said control means makes the said washing | cleaning and dewatering tank fluctuate between the normal rotation speed 1 and the predetermined rotation speed 2, and performs the said water supply at the time of the rotation speed increase of the said washing and dehydration tank. 2. The washing machine according to 2.   The control means detects the water supply flow rate from the arrival time from the specified water level during washing water supply to another specified water level, and repeats ON / OFF of intermittent water supply according to the detected water supply flow rate. The washing machine according to claim 4, wherein an OFF time is adjusted to make the amount of water used in the washing course in the tank substantially constant. Having cloth amount detecting means for detecting the amount of laundry;
The control means detects the presence or absence of laundry in the washing and dewatering tub with the cloth amount detection means at the beginning of the washing course in the tub, and displays an error display when it detects that the laundry is contained. The washing machine according to claim 1, wherein the washing course in the tank is not performed.

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