JP2006334117A - Washing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relatively easily prepare a high concentration detergent liquid and to improve washing power for clothes. <P>SOLUTION: This washing machine comprises: an outer tub; a washing and dewatering tub freely rotatably placed inside the outer tub; a pulsator freely rotatably placed inside the washing and dewatering tub; a back blade provided on the lower part of the pulsator; a driving means for rotationally driving the pulsator and the washing and dewatering tub; a water supply means for supplying water into the outer tub; a circulation path for elevating washing liquid and circulating it inside the washing and dewatering tub by rotating the back blade; and a control means for controlling the driving means and the water supply means. A detergent feeding port is provided on the upper part of the circulation path, the washing and dewatering tub is rotationally driven in both forward and opposite directions and water less than the water in a washing process is supplied by the water supply means, and the rotation of the pulsator is controlled and the high concentration detergent liquid is prepared by the driving means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a washing machine, and more particularly to a technology for introducing a detergent.

  The conventional washing machine can be washed with high-concentration washing water without increasing the amount of detergent by providing a process of stirring the laundry at a level lower than the specified water level. In addition, a technique is described in which the detergent works effectively against dirt that is difficult to remove by being sprinkled from the upper part, and can reduce the cleaning effect and cleaning unevenness (see, for example, Patent Document 1).

JP-A-02-302298 (page 4, FIG. 2).

  However, in the prior art, it was considered that the detergent was put into the washing tub prior to washing, and a detergent inlet for introducing the detergent was provided, or the detergent introduced into the detergent inlet was allowed to flow down well. There is no consideration for making it happen. In addition, in the prior art, powder detergent or the like is directly put into clothes to produce a high-concentration detergent solution and washed, and sufficient consideration is not given to problems such as discoloration of clothes. In addition, when the pulsator, which is a stirring blade, is rotated to produce a high-concentration detergent solution, if the pulsator is rotated while the clothing is entirely wet, the clothing tends to get entangled. However, sufficient consideration has not been made.

  An object of the present invention is to provide a washing machine capable of satisfactorily flowing down the detergent introduced into the detergent inlet. Another object of the present invention is to provide a washing machine capable of generating a high-concentration detergent solution relatively easily and having improved washing power for clothes.

  In order to provide a washing machine capable of satisfactorily flowing down the detergent thrown into the detergent inlet, the washing machine of the present invention includes an outer tub, and a washing and dehydrating tub that is rotatably installed in the outer tub. A washing machine having drive means for rotationally driving the washing / dehydrating tub, water supply means for supplying water into the outer tub, and control means for controlling the driving means and the water supply means, Is provided with a detergent inlet, the water supply means is arranged to inject water into the detergent inlet, and the control means controls the driving means to rotate the washing and dewatering tub in both forward and reverse directions. However, less water than the washing step is supplied to the detergent charging port by the water supply means to wash away the detergent charged into the detergent charging port.

At this time, a pulsator rotatably installed in the washing and dewatering tub, a back blade provided at a lower portion of the pulsator, a water supply means for supplying water into the outer tub, and the back blade A circulation passage that raises the washing liquid by rotation and circulates the washing liquid in the washing and dewatering tub; and a detergent inlet provided at an upper portion of the circulation passage; It is preferable that detergent is caused to flow down on the back side and the pulsator is rotationally controlled by the driving means to generate a high-concentration detergent solution.
Further, it is preferable that the washing and dewatering tub is alternately rotated in the forward direction and the reverse direction until the water level reaches a predetermined water level when the high-concentration detergent liquid is generated.
The position of the water supply port for supplying water into the outer tub by the water supply means may be positioned on the inner peripheral side of the balancer provided in the upper part of the washing / dehydrating tub and above the balancer.
The detergent inlet may be installed on the balancer so that water from the water supply port flows down.

  According to the present invention, when the detergent is poured by pouring water into the detergent inlet, the washing and dewatering tub is driven to rotate in both the forward and reverse directions, so that water flows at both ends of the detergent inlet in the rotational direction. And the detergent can be washed off well.

A washing machine according to an embodiment of the present invention includes an outer tub, a washing and dewatering tub rotatably placed in the outer tub, and a pulsator rotatably placed in the washing and dewatering tub. , A back blade provided at a lower portion of the pulsator, a drive unit for rotating the pulsator and the washing / dehydrating tub, a water supply unit for supplying water into the outer tub, and the back blade. The washing machine has a circulation passage for raising the washing liquid and circulating it in the washing and dewatering tub, and a control means for controlling the drive means and the water supply means, and a detergent is placed above the circulation passage. A mouth is provided, less water than the washing step is supplied by the water supply means, and the pulsator is rotationally controlled by the drive means to generate a high concentration detergent solution.
With this configuration, it is not necessary to put the detergent directly into the laundry, and a high-concentration liquid can be generated and sprayed on the clothes to improve the cleaning power.

A washing machine according to an embodiment of the present invention includes an outer tub, a washing and dewatering tub rotatably placed in the outer tub, and a pulsator rotatably placed in the washing and dewatering tub. , A back blade provided at a lower portion of the pulsator, a drive unit for rotating the pulsator and the washing / dehydrating tub, a water supply unit for supplying water into the outer tub, and the back blade. The washing machine has a circulation passage for raising the washing liquid and circulating it in the washing and dewatering tub, and a control means for controlling the drive means and the water supply means, and a detergent is placed above the circulation passage. A mouth is provided, water is supplied by the water supply means until the back blade is immersed at the lower part of the pulsator, and the pulsator is rotationally controlled by the drive means to generate a high concentration detergent solution.
With this configuration, it is possible to produce a high-concentration detergent solution in a state where the load applied to the pulsator is reduced, eliminating the need to put the detergent directly into the laundry, producing a high-concentration solution and spraying it on clothes, Detergency can be improved.

  The washing machine according to an embodiment of the present invention is further characterized in that a discharge port for discharging the washing liquid into the washing and dewatering tub is provided in the middle of the circulation path and below the detergent charging port. With this configuration, it is possible to efficiently spread and infiltrate the clothes with a high concentration detergent solution.

  The washing machine according to an embodiment of the present invention is further characterized in that the water level supplied when producing the high-concentration detergent liquid is constant.

  With this configuration, water supply control can be facilitated.

  The washing machine according to an embodiment of the present invention further includes a balancer inner peripheral side provided at an upper portion of the washing and dewatering tub with a water supply port for supplying water into the outer tub by water supply means. It is characterized by being positioned above.

  With this configuration, it is possible to prevent water from penetrating the clothes so much when water is supplied, and it is possible to reduce the burden on the motor when producing a high-concentration detergent solution by rotating the pulsator.

  The washing machine according to an embodiment of the present invention is further characterized in that the detergent charging port is installed in the balancer so that water from the water supply port flows down.

  With this configuration, it is possible to wash away the detergent adhering to the detergent inlet with water supply, and it is possible to suppress the detergent from sticking.

  The washing machine according to an embodiment of the present invention further generates a high-concentration detergent solution, and then rotates and drives the pulsator by driving means to raise the high-concentration detergent solution by the action of the back blade, thereby washing and dehydrating. It circulates in the tank, and additional water is supplied into the outer tank by the water supply means, and the pulsator is rotationally driven by the driving means to perform washing.

  With this configuration, it is possible to improve the cleaning power by generating a high-concentration detergent solution and then spraying it on the laundry. Further, after additional water supply, the pulsator is rotated and washed, so that the cleaning power can be increased as a whole.

  The washing machine according to an embodiment of the present invention is further characterized in that when the water is supplied into the outer tub by the water supply means, the washing and dewatering tub is rotationally driven by the driving means.

Thereby, when there exists a detergent inlet in the downward direction of a water supply port by water supply, the detergent inlet can be wash | cleaned.
(Example)
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a longitudinal sectional view of a fully automatic washing machine according to an embodiment of the present invention. The fully automatic washing machine has a structure in which a synthetic resin outer tub 4 is suspended by a suspension rod 2 and a vibration isolator 3 made of a coil spring or elastic rubber in an outer frame 1 made of steel. The outer tub 4 for storing washing water and rinsing water is equally suspended from four sides by four sets of suspension rods 2 and vibration isolator 3 that are locked to the four corners of the upper end of the outer frame 1. Supported to hang from the center. The driving device 7 is attached to the outside of the bottom of the outer tub 4 by a steel plate mounting base 7a. In the outer tub 4, a stainless steel washing and dewatering tub 5 is rotatably provided. The washing and dewatering tub 5 has a small hole 5a for water passage on the peripheral wall, a balancer 5b on the upper edge thereof, and a pulsator 6 on the inner side of the bottom. At the bottom of the washing and dewatering tub 5, a water inlet 5c that leads to the outer tub 4 is provided. In addition, there is a gap between the inner periphery of the outer tub 4 and the outer periphery of the washing and dehydrating tub 5, and the tank cover 4a covers the upper surface of the balancer 5b on the upper surface of the outer tub 4 so that the laundry or the like does not enter the gap. It has.

  The pulsator 6 has a large diameter (outer diameter is 90% or more of the inner diameter of the washing / dehydrating tub) that covers most of the bottom of the washing / dehydrating tub 5 and is bent upward so that the peripheral edge is pushed up. It is formed in a dish shape and is configured to rotate in a state of receiving and supporting the laundry 50. On the rear surface of the pulsator 6, there are radially provided back blades 6a. The pulsator 6 has a large number of bent holes 6b communicating the front and back surfaces.

  The pulsator 6 and the washing and dewatering tub 5 are rotated by a driving device 7. The drive device 7 incorporates a drive motor, an electric operation clutch mechanism, and a planetary gear speed reduction mechanism, and rotates the pulsator 6 with the washing / dehydrating tub 5 stationary (stirring mode), so that the washing / dehydrating tub 5 and the pulsator 6 are rotated. Has a selective driving function such that the two are integrally rotated in the same direction (dehydration mode).

  The drainage device 13 is provided immediately after the drainage port 13a on the bottom surface of the outer tub 4, and a drainage hose 14 is connected to the outlet. Washing water is stored in the outer tub 4 by closing the drainage device 13, and is discharged outside the washing machine through the drainage hose 14 by opening the drainage device 13. An air trap 4 b is provided at the bottom of the side surface of the outer tub 4, and the water pressure in the outer tub 4 is transmitted to the water level sensor 11 through the tube 12.

  A top cover 15 is provided on the outer frame 1. The top cover 15 is attached so as to cover the insertion port 15a for loading laundry, the rear storage box 15b for storing the water supply unit 17 and the like, the front operation box 15c for storing electric parts such as a microcomputer, and the insertion port 15a. And a synthetic resin lid 16 that can be opened and closed.

  The front storage box 15c includes an operation panel 18 including a power switch 20, an input switch group 18a, and a display element group 18b, a water level sensor 11 that generates a water level signal corresponding to the water level in the outer tub 4, and a control unit. 19 is built in. These constitute a control device.

  FIG. 2 is a block diagram of a washing machine control unit mainly composed of the microcomputer 25. The microcomputer 25 is connected to the input switch group 18a, the water level sensor 11, and the lid switch 23, and is operated by a user's button operation and washing and washing. An information signal such as the water level in the dewatering tank 5 is received. The output signal from the microcomputer 25 is connected to the drive circuit 24, supplying commercial power to the drive motor 7a, the electrically operated clutch mechanism 7b, the water supply electromagnetic valve 17b, the drain electromagnetic valve 17b of the drainage device 13, etc. Controls opening and closing or rotation. In order to inform the user of the operation of the washing machine, the display element group 18b is controlled to display the progress status. The power supply circuit 32 rectifies and smoothes the commercial power supply to create a DC power supply necessary for the microcomputer 25.

  Next, details of the detergent charging part and the detergent dissolving part will be described with reference to FIG. FIG. 3 is a perspective view of the washing and dewatering tub 5, with a part of the peripheral wall cut away. A circulation passage 8 is provided in the longitudinal direction inside the peripheral wall of the washing and dewatering tub 5. The circulation passage 8 has a detergent inlet 8 a at the top, and the lower end opens toward a gap 10 formed by the pulsator 6 and the bottom surface of the washing and dewatering tub 5. The detergent inlet 8a is located at substantially the same height as the upper surface of the balancer 5b. The bottom surface of the washing / dehydrating tub 5 and the circulation passage 8 are smoothly connected by the inclined surface 9, and the detergent introduced from the detergent inlet 8 a falls down the circulation passage 8, and with that momentum, below the back blade 6 a of the pulsator 6. The gap 10 is reached. A gap 10 between the bottom of the washing / dehydrating tub 5 and the back blade 6a is narrowed to cause a strong water flow when the detergent is dissolved and to promote dissolution of the detergent. In addition, the structure of the detergent inlet 8a shown in the figure is an example, and any structure may be used as long as the detergent can be easily introduced into the circulation passage 8.

  A discharge port 8 b is provided in the lower part of the circulation passage 8. The discharge port 8b is for discharging the dissolved detergent solution into the washing and dewatering tub 5 and permeating the laundry. The number of discharge ports 8b may be any number, but in order to discharge detergent liquid over a wide range in the washing and dewatering tub 5, it is preferable to provide a plurality in the vertical direction. Further, the shape of the discharge port 8b may be constituted by a vertically long slit or a large number of holes in addition to a horizontally long slit as shown in the figure.

  If the washing and dewatering tub 5 can be freely rotated when the detergent is charged, the circulation passage 8 and the detergent charging port 8a can be turned at one place because the washing and dewatering tub 5 can be turned by hand to a position where it can be easily put. However, when the washing and dewatering tub 5 is fixed when the detergent is added, it is better to provide a plurality. This is because, regardless of the circumferential position of the washing and dewatering tub 5, it is possible to select the detergent charging port 8 a that is easy to load, and the usability is improved.

  In the case where the detergent remains in the detergent inlet 8a when the detergent is introduced, the water supply unit 17 and the water supply position having the structure as shown in FIGS. 4 and 5 are used in order to wash away the detergent.

  FIG. 4 is a top view of the water supply unit 17 (AA cross-sectional view of FIG. 5). FIG. 5 is a longitudinal section of the washing machine showing the water supply position and the flow of water. The water supply unit 17 includes a water tap 17a, a water supply electromagnetic valve 17b, and a water supply box 17c. The bottom surface of the water supply box 17c has an inclined surface that is lowest on the washing / dehydrating tub 5 side, and has a slit-shaped water supply port 17d at the lowest portion. The water supply port 17d has a rectifying action so that water flows down almost directly, and the shape of the opening may be formed by a plurality of holes in addition to a slit shape that is long horizontally as shown in the figure. .

  The position of the water supply port 17d for supplying water into the outer tub by the water supply means is positioned on the inner peripheral side of the balancer 5b provided in the upper part of the washing / dehydrating tub 5 and above the balancer 5b. By doing so, the water flows in a film shape slightly inside the inner peripheral surface of the balancer 5b, so that it does not allow much water to permeate the clothing when water is supplied. The burden on the motor when producing the detergent liquid can be reduced.

  Further, one or more detergent inlets 8a are installed on the balancer so that the water from the water supply port 17d flows down. With this configuration, it is possible to wash away the detergent adhering to the detergent inlet with water supply, and it is possible to suppress the detergent from sticking.

  If water is supplied while rotating the washing / dehydrating tub 5, water flows into the detergent inlet 8a on the inner peripheral surface of the balancer 5b, and the detergent remaining in the detergent inlet 8a and the circulation passage 8 is washed away. Can do. At this time, if the washing and dewatering tub 5 is rotated only in one direction, the water poured into the detergent charging port 8a may flow in the detergent charging port 8a backward in the rotation direction. For example, when the water pressure is low, the flow rate of water to be injected decreases, and this phenomenon is likely to occur. By supplying water while alternately rotating the washing and dewatering tub 5 in both the forward direction and the reverse direction (both left and right directions), it is possible to guide the injected water to both ends in the rotational direction of the detergent inlet. The detergent can be satisfactorily washed away from the detergent inlet without remaining at both ends in the rotational direction of the detergent inlet. The rotational driving of the washing and dewatering tub 5 in the forward and reverse directions may be repeated until the water level reaches a predetermined level when supplying the high concentration detergent liquid.

  Further, the water flowing down into the laundry 50 flows as shown by the arrows in the figure. Since water flows down to the outer periphery of the washing / dehydrating tub 5, the water 50 wets the laundry 50 located on the outer peripheral side of the washing / dehydrating tub 5. 5 Flows down the gap between the wall surface and the laundry 50 and the small hole 5a and accumulates at the bottom of the outer tub 4. Accordingly, since water does not soak into the entire laundry 50, an increase in the weight of the laundry 50 due to water content can be minimized. This is particularly effective when the amount of the laundry 50 is large. When the amount of water soaking into the laundry 50 is large, the weight acting on the pulsator 6 increases, and the pulsator 6 is locked by the weight of the laundry 50 during dissolution and stirring. As a result, the detergent may not be sufficiently dissolved. In addition, there are detergents that harden in a short time when left wet. However, since the amount of water soaked into the laundry 50 is reduced by supplying water as described above, water accumulates in the outer tub 4 in a short time, and the time from the start of water supply to the start of dissolution and stirring can be shortened. The leaving time after getting wet is shortened, and the remaining undissolved detergent can be prevented.

  The dissolution stirring is started after the water level sensor 11 detects that the detergent dissolution water level shown in the figure has been reached. This detergent-dissolving water level is preferably as low as possible (small amount of water) in order to increase the concentration of the detergent solution, but since the detergent is dissolved by the back blade 6a of the pulsator 6, less water is supplied than in the washing step. Supply water by means. The detergent-dissolved water level is supplied to the water level where the back blade 6a is immersed in the lower part of the pulsator 6. As a result, the load on the motor can be reduced, and motor lock can be suppressed. Further, the detergent-dissolved water level is controlled regardless of the amount of cloth, so that the penetration of the washing water into the cloth can be suppressed and the control can be simplified.

  By adopting the configuration as described above, dissolution and stirring can be sufficiently performed and dissolution can be performed with a small amount of water, so that a high-concentration detergent solution can be generated. The detergent concentration at this time is about 5 to 8 times the concentration (1 time) preferred for washing although it varies depending on the load.

  Next, operation | movement of each process of the washing machine comprised in this way is demonstrated. FIG. 6 is a flowchart of each process executed by the microcomputer 25 in the control unit 19.

  When the washing start button switch of the input switch group 18a is turned on, the microcomputer 25 executes the following control process.

Step 101
When the user puts the laundry 50 into the washing and dewatering tub 5, operates the input switch group 18a on the operation panel to perform initial setting, and presses the washing start button switch, the microcomputer 25 automatically performs each process. Start the operation control process.

  In the initial setting, a washing course according to the laundry 50, a washing time, a dehydration time, a water amount, the number of times of rinsing, and the like are set as necessary.

Step 102
A cloth amount detection control process for the laundry 50 is performed. This cloth amount detection is performed by controlling the electric operation clutch mechanism 7b of the drive device 7 to the agitation mode in the dry cloth state before washing, energizing the drive motor 7a for a short time to rotationally drive the pulsator 6, and at the time of rotational acceleration. Detection is based on acceleration characteristics or deceleration characteristics in inertial rotation when energization of the drive motor 7a is stopped. Based on the detection result, the amount of washing water and the amount of detergent for generating washing water having a preferable detergent concentration are calculated and determined, and this amount of detergent is displayed by the display element group 18b. The user puts a predetermined amount of detergent into the detergent inlet 8a with reference to the displayed detergent amount. The detergent introduced from the detergent introduction port 8a falls in the circulation passage 8, and reaches the gap 10 below the back blade 6a of the pulsator 6 with the momentum.

Step 103
After the user puts in the detergent, the user closes the lid 16 provided on the top cover 15. When the lid 16 is closed, the microcomputer 25 receives a signal from the lid switch 23, opens the water supply electromagnetic valve 17b, and starts water supply. At this time, the electric operation clutch mechanism 7b of the drive device 7 is controlled to the dewatering mode, the drive motor 7a is operated at a low speed, and water is supplied while rotating the washing and dewatering tub 5 at a low speed for about 30 seconds from the start of water supply. This is because the detergent inlet 8a and the circulation passage 8 are washed away in consideration of the case where the detergent remains in the detergent inlet 8a and the circulation passage 8. After rotating the washing / dehydrating tub 5 at a low speed for about 30 seconds, the operation of the drive motor 7a is stopped, and water supply is continued without rotating the washing / dehydrating tub 5. The reason why the water supply while rotating the washing and dewatering tub 5 is shortened in this way is to reduce the amount of water soaking into the laundry 50 and to reduce the load on the pulsator 6 when dissolving the detergent in step 104 described later. This is to dissolve the detergent. Furthermore, by stopping the washing / dehydrating tub 5 and supplying the water in the middle, water can be stored in the outer tub 4 in a short time, and it is possible to prevent the detergent from getting wet and solidifying to cause undissolved residue.

  And if it detects that the water level sensor 11 reached the detergent melt | dissolution water level, the microcomputer 25 will receive the signal from the water level sensor 11, and will close the water supply electromagnetic valve 17b.

Step 104
Dissolves the detergent to produce a highly concentrated detergent solution. In the detergent dissolving step, the electric operation clutch mechanism 7b of the drive device 7 is switched to the agitation mode, and control is performed so as to repeat the forward / reverse operation of the drive motor 7a, thereby rotating the pulsator 6 forward and backward. Thus, the detergent and water introduced into the gap 10 below the back blade 6a are stirred by the back blade 6a of the pulsator 6 to generate a high-concentration detergent liquid. The energization time to the drive motor 7a is controlled to energize for 0.5 seconds and stop for 0.5 seconds, for example. This is called an operation time limit and is expressed as 0.5 seconds on-0.5 seconds off. If the on time is too long, the laundry 50 on the pulsator 6 moves violently and shakes the washing and dewatering tub 5 by a reaction force, and the outer tub 4 hits the outer frame 1 and causes noise. In consideration of this, the on-time should be short, but it is set to an operation time period in which the detergent can be sufficiently dissolved. That is, the on time is preferably 0.4 to 0.5 seconds. More preferably, the operation time period is made variable in accordance with the amount of the laundry 50 (the more the amount of laundry is, the more difficult the pulsator rotates, so the on time is lengthened).

Step 105
Infiltrate highly concentrated detergent solution. The penetration of the high-concentration detergent solution is performed by extending the detergent dissolution process. A high-concentration detergent solution generated by forward / reverse rotation of the pulsator 6 is supplied into the washing and dewatering tub 5 using the pumping action of the back blade 6 a of the pulsator 6. A method for supplying the high-concentration detergent solution will be described in detail with reference to FIG. When the pulsator 6 is rotated, the back blade 6a of the pulsator 6 functions as a centrifugal pump, and is located between the washing / dehydrating tub 5 and the outer tub 4 (bottom) from the water inlet 5c at the bottom of the washing / dehydrating tub 5. The accumulated high-concentration detergent solution is sucked into the gap 10. Then, the high-concentration detergent liquid is discharged from the detergent liquid inlet 8c of the circulation passage 8 located at the bottom of the washing / dehydrating tank 5 through the circulation passage 8 and into the washing / dehydrating tank 5 from the discharge port 8b. It penetrates into the laundry 50 from the side of the. Further, the high-concentration detergent solution is sprayed into the washing and dehydrating tub 5 from a large number of holes 6 b provided in the pulsator 6 and gaps on the outer periphery of the pulsator 6 and penetrates into the laundry 50 from below the laundry 50. Further, as described above, the pulsator 6 has a dish-like shape bent upward so as to push up the large-diameter peripheral edge covering most of the bottom. For this reason, the laundry on the pulsator also rotates together with the pulsator as the pulsator 6 rotates. As a result, the high-concentration detergent liquid uniformly penetrates the laundry 50 from the side and the lower side of the laundry 50. A high-concentration detergent solution having a concentration of about 5 to 8 times the concentration preferable for washing (1 time) has a penetration rate 3 to 4 times higher than that of a detergent solution having a concentration of 1 time, and penetrates the entire laundry 50 quickly. Then, the chemical cleaning power (such as osmotic emulsification and dispersion) of the high-concentration detergent liquid acts on the dirt adhering to the laundry 50, and the dirt is easily removed from the laundry 50.

  In this high-concentration detergent solution permeation process, it is sufficient that the forward / reverse rotation time of the pulsator 6 is about 30 seconds to 1 minute including the detergent dissolution process of Step 105, but the time is increased as the amount of the laundry 50 increases. It's better to do it.

Step 106
The water supply electromagnetic valve 17b is opened to start supplying tap water. The washing water is supplied up to the amount of water determined in step 102, but is interrupted in order to detect the amount of cloth (packing value) and the quality of the laundry 50 during the water supply. This interrupted water level is a water level suitable for detecting the amount of compress and the quality of the cloth preset in the microcomputer 25. In addition, the density | concentration of a high concentration detergent liquid falls gradually during the water supply to this interruption water level. During this time, the pulsator 6 may be rotated forward and backward (the operation time period may be the same as in the detergent dissolution step). By doing so, mechanical force can be applied to the laundry 50 (the laundry near the pulsator 6 because the amount of water is small) in the high-concentration detergent solution, and the cleaning power is improved.

Step 107
The amount of poultice and the quality of the cloth are detected to correct the amount of washing water supplied and determine the washing process (washing process and rinsing process). In this cloth quality detection, water supply is interrupted at a predetermined low water level, the electric operation clutch mechanism 7b of the drive device 7 is controlled to the stirring mode, the drive motor 7a is energized for a short time, and the pulsator 6 is driven to rotate. First deceleration characteristic (amount of compress cloth) in inertial rotation at the time of extinction is detected, then water supply is resumed, washing water is replenished to a predetermined high water level, water supply is interrupted, and drive motor 7a is attached for a short time The pulsator 6 is rotationally driven to detect the second deceleration characteristic in the inertial rotation at the time of deactivation, and the cloth quality of the laundry 50 is detected based on the difference between the first attenuation characteristic and the second attenuation characteristic. . This cloth quality detection control is omitted when it becomes unnecessary by the initial setting. Then, the time and water flow (strength of mechanical stirring) in the washing and rinsing steps are determined according to the fabric quality.

Step 108
Tap water is supplied up to the amount of water (water level) determined in step 102. With this water supply, the washing water is diluted with a high concentration detergent solution to a detergent concentration (1 time) preferable for washing. As a result, the laundry 50 is immersed in the washing water having a predetermined detergent concentration (1 time) in the washing and dewatering tub 5.

Step 109
The drive unit 7 is controlled to perform the washing process of the washing water flow and washing time set in step 107. In this washing process, the drive device 7 controls the electric operation clutch mechanism 7b to the agitation mode and repeats the forward / reverse operation of the drive motor 7a, thereby rotating the pulsator 6 forward and backward. At this time, it is already easy to remove dirt, and even if the mechanical force applied to the laundry 50 is reduced, a high cleaning power can be obtained, and fabric entanglement and fabric damage can be suppressed.

Step 110
The drain electromagnetic valve 13a is opened to drain the wash water out of the machine. Then, the electric operation clutch mechanism 7b of the drive device 7 is controlled to the dehydration mode, and the laundry / dehydration tub 5 and the pulsator 6 are integrally rotated at a high speed by rotating the drive motor 7b at a high speed. Centrifugal dehydration of the wash water.

Step 111
The water supply electromagnetic valve 17b is opened to supply rinsing water (tap water) to a set amount of water.

Step 112
The rinsing process is executed by controlling the driving device 7. The drive device 7 controls the electric operation clutch mechanism 7b to the agitation mode, and repeats the forward / reverse operation of the drive motor 7a, thereby rotating the pulsator 6 forward and reverse, rinsing the detergent contained in the laundry 50 into the water. .

Step 113
The drain electromagnetic valve 13a is opened to drain the rinsing water out of the machine.

Step 114
The electric operation clutch mechanism 7b of the driving device 7 is controlled to the dehydration mode while the drain electromagnetic valve 13a is kept open, and the washing / dehydrating tub 5 and the pulsator 6 are integrated at a high speed by rotating the drive motor 7b at a high speed. By rotating, the moisture of the laundry 50 is centrifugally dehydrated. When centrifugal dehydration is performed for a predetermined time, washing is completed.

It is a vertical side view of the fully automatic washing machine which shows one embodiment of this invention. It is a block diagram which shows the electric system of the washing machine shown in FIG. It is a perspective view of a washing and dehydrating tub showing an embodiment of the present invention. It is a top view of the water supply unit cut | disconnected by the AA line shown in FIG. It is a longitudinal section of a fully automatic washing machine which shows a flow of water at the time of water supply. It is a flowchart of each process which the microcomputer in the control unit of the washing machine shown in FIG. 1 performs. It is the figure which showed the penetration method of the high concentration detergent liquid in the high concentration detergent liquid permeation process of this invention.

Explanation of symbols

  4 ... Outer tub, 4a ... Air trap, 4b ... Tank cover, 5 ... Washing and dewatering tub, 5a ... Small hole, 5b ... Balancer, 5c ... Water inlet, 6 ... Pulsator, 6a ... Back blade, 6b ... Hole, 8 ... Detergent passage, 8a ... Detergent inlet, 8b ... Discharge port, 8c ... Detergent liquid inlet, 9 ... Inclined part, 10 ... Gap, 11 ... Water level sensor, 13 ... Drainage device, 14 ... Drainage hose, 16 ... Lid, 17 ... Water supply unit, 17a water tap, 17b ... water supply solenoid valve, 17c ... water supply box, 17d ... opening, 50 ... laundry.

Claims (5)

  An outer tub, a washing / dehydrating tub rotatably installed in the outer tub, a driving means for rotationally driving the washing / dehydrating tub, a water supply means for supplying water into the outer tub, the driving means, and the A washing machine having control means for controlling water supply means, wherein the washing and dewatering tub is provided with a detergent inlet, the water supply means is arranged to inject water into the detergent inlet, and the control means is By controlling the driving means, the washing and dewatering tub is driven to rotate in both forward and reverse directions, and the water supply means supplies less water than the washing step to the detergent inlet, thereby washing away the detergent introduced into the detergent inlet. A washing machine characterized by that.   2. The washing machine according to claim 1, wherein a pulsator rotatably installed in the washing and dewatering tub, a back blade provided at a lower portion of the pulsator, and water supply for supplying water into the outer tub. Means for rotating the back blade to circulate the washing liquid in the washing and dewatering tub, and a detergent inlet provided at the upper part of the circulation passage, the washing and dewatering A washing machine characterized in that a detergent is flowed down in the tank and on the back side of the pulsator, and the pulsator is rotationally controlled by the driving means to generate a high-concentration detergent solution.   The washing machine according to claim 2, wherein the washing and dewatering tub is alternately rotated in the forward direction and the reverse direction until the water level reaches a predetermined water level when the high-concentration detergent liquid is generated. Features a washing machine.   The washing machine according to claim 1 or 2, wherein a position of a water supply port for supplying water into the outer tub by the water supply means is an inner peripheral side of a balancer provided at an upper portion of the washing and dewatering tub. A washing machine characterized by being positioned above a balancer. 5. The washing machine according to claim 4, wherein the detergent inlet is installed in the balancer so that water from the water supply port flows down.

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