JP2002177687A - Washing machine and washing and drying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease mechanical force acting on clothes for washing in a washing process. SOLUTION: A highly concentrated detergent liquid with a detergent concentration of 5-30 times of the detergent concentration of a washing water is formed by dissolving a powder detergent into a small amount of detergent dissolving water and by immersing the clothes for washing into this highly concentrated detergent liquid (penetrating the liquid into the clothes for washing) and keeping them in the liquid, washing efficiency is improved by utilizing chemical detergency of the detergent acting on stains stuck on the clothes to decrease the mechanical force acting on the clothes for washing in the washing thereafter.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a washing machine and a washing / drying machine.

[0002]

2. Description of the Related Art A fully automatic washing machine detects the amount of laundry put into a washing and dewatering tub, and puts in an amount of detergent corresponding to the amount of laundry. After supplying tap water (washing water) in an amount corresponding to the above, the agitating blades are rotated forward and reverse, or the washing and dewatering tub is rotated in one direction, or rotated forward and reverse to apply a mechanical force to the laundry clothes. Performing a rinsing step of supplying tap water (rinsing water) and applying a mechanical force to the laundry garment as well, and then rotating the tub for washing and dewatering, thereby rinsing the laundry. This is a configuration for executing a dehydration step of centrifugally dehydrating water. The washing / drying machine that performs the drying of the laundry clothes is configured to further execute a hot air drying step of blowing hot air to dry the washing clothes.

In such a fully automatic washing machine or washing / drying machine, the amount of the powdered synthetic detergent dissolved in the washing water in the washing process is as small as about 40 g / 60 L (detergent amount / washing water amount). The detergent concentration is about 0.07%.

[0004] In order to carry out washing for removing dirt attached to laundry with washing water having a low detergent concentration, it is necessary to increase the rotational force of a stirring blade or a washing and dewatering tank.
By increasing the washing time, the mechanical force acting on the laundry should be increased. As a result, there is a disadvantage that the laundry is severely damaged by the mechanical force and the laundry is entangled.

[0005] When the entanglement of the laundry is increased, the unevenness of washing is increased, and it becomes difficult to take out the laundry.
Further, in a washing / drying machine, since it is difficult to dry with hot air in the washing and dewatering tub, it is necessary to reduce the mechanical force acting on the laundry to perform hot air drying. As a result, there is a drawback that dirt is hardly removed.

In order to reduce the mechanical force acting on the laundry in the washing step, for example, Japanese Patent Application Laid-Open No. 7-80182 adds a pre-soaking step in which the laundry is dipped in a high-concentration detergent solution before the washing step. Thus, a fully automatic washing machine that utilizes the chemical detergency of a highly concentrated detergent has been disclosed. Further, Japanese Patent Application Laid-Open No. 8-47594 discloses a washing machine that performs soaking or washing with washing water having a high detergent concentration.

[0007] However, these conventional washing machines do not provide a specific configuration for effectively exerting the chemical detergency of the detergent.

[0008]

SUMMARY OF THE INVENTION One object of the present invention is to provide a machine for applying laundry detergent to a laundry garment in a washing process by effectively using the powder detergent to exert the chemical detergency of the detergent. It is to propose a washing machine capable of greatly reducing the power.

Another object of the present invention is to propose a washing machine capable of effectively exerting the chemical detergency of a powder detergent and preventing discoloration (fading) of laundry clothes. It is in.

Still another object of the present invention is to provide a washing and drying machine for drying laundry clothes dehydrated in the washing and dewatering tub by blowing hot air into the washing and dewatering tub, and to act on the laundry and clothes in the washing step. An object of the present invention is to reduce the mechanical force, reduce the entanglement of the laundry in the washing and dewatering tub without deteriorating the stain removal, improve the drying efficiency, and reduce uneven drying.

It is still another object of the present invention to efficiently produce a moderately concentrated detergent solution from a powder detergent to prevent excessive use of the powder detergent.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a high-concentration detergent solution is produced by dissolving a powder detergent in a small amount of detergent-dissolving water, and the high-concentration detergent solution is immersed (permeated) into laundry clothes and set aside. Thus, the cleaning power of the detergent acting on the dirt adhering to the clothes is improved to improve the cleaning efficiency, thereby reducing the mechanical force acting on the laundry in the subsequent washing.

[0013] In addition, by adjusting the concentration of the high-concentration detergent solution to be immersed in the laundry and the standing time according to the quality of the laundry (cloth, color, pattern, and color fastness), it is possible to obtain a preferable chemical detergency. Act on laundry.

In addition, by adjusting the amount of detergent dissolving water for dissolving the powder detergent set according to the amount of laundry clothes,
A high-concentration detergent solution that exerts favorable chemical detergency on laundry clothes is efficiently produced.

More specifically, a washing and drying machine for sequentially executing each step of washing with washing water, rinsing with rinsing water, centrifugal dehydration, and hot-air drying is performed on the laundry in the washing and dewatering tub. A powder detergent is dissolved in detergent-dissolved water, and a high-concentration detergent solution generated at a concentration higher than the detergent concentration dissolved in the wash water in the washing step is immersed in the laundry clothes in the washing and dewatering tub and immersed for a predetermined time. Supplying water after the immersion step to the washing water in which the detergent liquid is diluted to apply a mechanical force to the laundry clothes, rinsing and dewatering steps, and supplying hot air to the washing and dewatering tub. A drying step of drying the dehydrated laundry clothes is performed.

The high-concentration detergent solution is characterized in that the powder detergent is dissolved in detergent-dissolved water and is produced at a higher concentration than the detergent concentration dissolved in the wash water in the washing step.

The high-concentration detergent solution is characterized in that the detergent concentration is 5 to 30 times the detergent concentration in the washing water in the washing step.

[0018] Further, the stationary time is adjusted according to the quality of laundry and / or the fastness of laundry.

Further, the stationary time is set to 4 to 7 minutes.

Further, the washing and dewatering tub is kept stationary during the immersion step.

Further, the washing and dewatering tub in the washing and dewatering tub is rotated at a low speed in a state where the washing and dewatering tub is developed so as to be pressed against the side wall of the washing and dewatering tub by wet and centrifugal dehydration. It is characterized in that a high concentration detergent solution is sprinkled while sinking in laundry clothes.

Further, the amounts of the washing water and the detergent powder are set according to the amount of the laundry, and the amount of the detergent-dissolved water that dissolves the powder detergent to produce a high-concentration detergent solution is determined by the quality and / or the quality of the laundry. Alternatively, the setting is made according to the washing fastness.

Further, in a washing machine in which washing and rinsing steps are carried out by infiltrating laundry clothes in a washing and dewatering tub with a high-concentration detergent solution to execute a washing and rinsing step, and thereafter performing a dehydrating step, washing water in the washing step is provided. A high-concentration detergent solution having a concentration of 5 to 30 times the detergent concentration is immersed in the laundry and left standing for a predetermined time, and then washing water is supplied to start the washing process.

The high-concentration detergent solution is produced by dissolving a powder detergent put in a detergent dissolving container with detergent dissolving water.

Further, the high-concentration detergent liquid is caused to flow down into the washing and dewatering tub while rotating the washing and dewatering tub containing the laundry and to sprinkle on the laundry.

The laundry in the washing and dewatering tub is rotated at a low speed before the high concentration detergent solution is sprinkled, and the washing and dewatering tub is moistened with the sprayed water. It is characterized by spinning at a speed and centrifugal dehydration.

Further, the washing and dewatering tub is rotated at such a low speed that the high concentration detergent liquid immersed in the laundry is not centrifugally dehydrated during the stationary time.

Further, the washing and dewatering tub is kept stationary during the stationary time.

Further, the stationary time is set to 4 to 7 minutes.

[0030] The stationary time is adjusted according to the quality and / or the fastness of the laundry.

Further, the washing and dewatering tub in the washing and dewatering tub is rotated at a low speed in a state where the laundry is spread so as to be pressed against the side wall of the washing and dewatering tub by wet and centrifugal dehydration. It is characterized in that a high-concentration detergent solution is sprinkled while performing.

Further, the amounts of the washing water and the detergent powder are set in accordance with the amount of the laundry, and the amount of the detergent-dissolving water that dissolves the powder detergent to produce a high-concentration detergent solution is determined by the quality and / or quality of the laundry. Alternatively, the setting is made according to the washing fastness.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION A high concentration detergent liquid is immersed (permeated) into laundry and left as it is, so that the chemical cleaning power of the detergent acts on the dirt adhering to the laundry to produce a cleaning action. Therefore, the mechanical force acting on the laundry in subsequent washing can be reduced. This chemical cleaning action is affected by the concentration of the high-concentration detergent solution to be immersed in laundry and the standing time.

Since the amount of the powder detergent used for washing is adjusted in accordance with the amount of the laundry, the powder detergent is used in order to produce a high-concentration detergent solution suitable for generating a preferable chemical detergency. It is desirable to adjust the supply amount of detergent dissolved water according to the amount of detergent.

Also, some laundry clothes may be discolored (fading) if immersed in a high-concentration detergent solution, and in washing clothes that may be discolored, a high-concentration detergent immersed in the laundry clothes. It is desirable to lower the concentration of the liquid, shorten the deferment time or omit the deferment, and prevent the immersion of the high concentration detergent liquid.

Further, the discoloration of the laundry by the high-concentration detergent liquid becomes remarkable due to uneven immersion of the high-concentration detergent liquid on the laundry. Therefore, it is desirable to sprinkle the high-concentration detergent liquid in a wet and spread state so that the laundry can be uniformly immersed in the laundry.

An embodiment of a fully automatic washing and drying machine in consideration of the above will be described below.

FIG. 1 is a longitudinal sectional view of a fully automatic washing and drying machine according to an embodiment of the present invention.

Reference numeral 1 denotes a frame constituting an outer shell. 2 is
The washing / dewatering tub has a water passage hole 2a on its peripheral wall, a fluid balancer 3 on its upper edge, and a rotatable stirring blade 4 inside the bottom. Reference numeral 5 denotes an outer tub that contains the washing and dewatering tub 2. A driving device 6 is attached to the outer side of the bottom by a steel-plated mounting base 7. Suspend. The driving device 6 rotates the stirring blade 4 in the washing and rinsing processes to apply mechanical force to the laundry, and in the dehydration process, rotates the washing and dewatering tub 2 to centrifugally dehydrate the laundry in the tub. Built-in motor, clutch mechanism and reduction mechanism.

Upper cover 9 provided with clothing input opening 9a
Is fitted to the edge of the opening so as to cover the upper opening of the frame 1, and is attached to the frame 1 together with the front panel 10 and the back panel 11 by attaching screws.

A front panel box 12 formed between the top cover 9 and the front panel 10 has a power switch 13, an operation panel 14 having input switches and display elements, and a control panel 14 according to the water level in the outer tank 5. A water level sensor 15 for generating a water level signal and a control unit 16 are incorporated. These constitute a control device.

The back panel box 17 formed between the top cover 9 and the back panel 11 contains a washing water supply means, a high-concentration detergent liquid generating means, and a dry hot air supply means side by side.

The washing water supply means is constituted by a water supply solenoid valve 20 having the water inlet side connected to the faucet 18 and the water outlet side connected to the water inlet 19.

The high-concentration detergent liquid generating means is a detergent dissolving vessel 2
1 is supplied with detergent water from the water supply solenoid valve 20, and the powdered synthetic detergent put in the detergent dissolution container 21 is dissolved with the detergent solution while stirring to produce a high-concentration detergent solution. It is configured to supply to the water port 19.

The drying hot air supply means is configured so that the outside air sucked by the blower 23 from the air inlet 22 is heated by the heater 24 and blown into the washing and dewatering tub 2 through the blowing duct 25. The water inlet 19 is formed so as to discharge water toward a position near the edge inside the opening of the washing and dewatering tub 2.

Clothes input opening 9a formed in top cover 9
Is opened and closed by a lid 26. Outer tank 5
The drain port 5a formed at the bottom of is connected to a drain hose 28 via a drain solenoid valve 27, and the air trap 5b is connected to the water level sensor 15 via an air tube 29. A base 31 formed of a synthetic resin having legs 30 attached to four corners is attached to the lower edge of the frame 1.

Reference numeral 32 denotes laundry clothes put into the washing and dewatering tub 2.

FIG. 2 is a block diagram of a circuit showing an electric configuration of the fully automatic washing machine.

The control unit 16 is composed mainly of a microcomputer 16a.
, Power supply relay 16c, drive device 6 and water supply solenoid valve 20
, Drain electromagnetic valve 27, detergent stirring motor 21 a, and blower 23
And a drive circuit 16d having a group of control semiconductor AC switching elements (FLS) for supplying power to the heater 24.

The drive circuit 16d includes two semiconductor AC switching elements (FLS) 16d1 for reversible rotation control and reverse rotation electromagnetic braking (electromagnetic brake) for power supply control to the stator winding of the motor 6a in the driving device 6. 16
d2. FLS16d1 is a semiconductor switching element for forward rotation power supply control, and FLS16d2 is a semiconductor AC switching element for reverse rotation power supply control and reverse rotation electromagnetic braking (electromagnetic brake). Regarding the power supply control to the electromagnetic coil 6b of the clutch mechanism in the driving device 6,
In order to supply a DC drive current suitable for generating a large electromagnetic force, a rectifying diode bridge 16d3 and a phase control FLS 16d4 for controlling the magnitude of the drive current are provided.

Reference numeral 6c denotes a rotation sensor for detecting the rotation of the motor 6a, and 33 denotes a phase dividing capacitor for the motor 6a.

The drive circuit 16d is provided with the water supply electromagnetic valve 2
0, drain solenoid valve 27, detergent stirring motor 21a, blower 2
3. FLS 16d5 to 1 for controlling power supply to heater 24
6d9. The drive circuit 16 controls FLSd1 to FLSd1 in accordance with an instruction from the microcomputer 16a.
By controlling the conduction of FLSd9, power supply control to the dependent load is performed.

When the power switch 13 is turned on, the microcomputer 16a closes the power relay 16c, starts a pre-installed control processing program, and enters a standby state. Then, the input switch group 14 of the operation panel 14
a, the input signals from the water level sensor 15 and the rotation sensor 6c, and the display element group 14b and the drive circuit 16d are controlled to execute the respective steps of washing, rinsing, dehydrating and hot-air drying of the laundry 32.

Input switch group 14a of operation panel 14
A cloth setting switch, a washing fastness (dyeing fastness) setting switch for setting information for soaking a high-concentration detergent solution in laundry clothes 32 to effectively generate chemical detergency, A clothing type (shape and color / pattern) setting switch and a washing method setting switch are provided. The washing mode setting switch is also provided with a switch for setting a washing mode in which the step of immersing the high-concentration detergent solution in the laundry and leaving it unattended is omitted.

Next, in the washing, rinsing, dehydrating, and hot-air drying steps of the laundry, the high-concentration detergent solution is immersed in the laundry and left standing to effectively generate the chemical detergency of the detergent. An example will be described.

FIG. 3 is a flowchart of the washing, rinsing, dehydrating and drying steps executed by the microcomputer 16a in the control unit 16.

When the washing start button switch in the input switch group 14a is turned on, the microcomputer 16a executes the following control processing.

Step 301 The laundry 32 is put into the washing / dewatering tub 2 and the operation panel 1
4 to operate the input switch group 14a to perform initial setting,
When the washing start button switch is pressed, the automatic control processing of the washing, rinsing, dehydrating and drying steps is started.

In the initial setting, information for avoiding discoloration caused by immersing a high-concentration detergent solution in the laundry 32 and setting the same is set. Specifically, information such as cloth quality, washing fastness (fastness of dyeing), type of clothing (shape and color pattern), and washing method are set as necessary.

Step 302 A detection control process of the amount of the laundry 32 is performed. This cloth amount detection is performed by the motor 6 of the driving device 6 in a dry cloth state before water supply.
a is energized for a short time to rotationally drive the agitating blade 4, and the detection is performed based on the deceleration characteristic in the inertial rotation at the time of deenergization. The amount of washing water and the amount of powder detergent for generating washing water having a preferable detergent concentration are calculated and determined based on the detection result (the amount of laundry of laundry), and the amount of powder detergent is displayed by the display element group 14b. A predetermined amount of powdered synthetic detergent is charged into the detergent dissolving container 21. The form of the laundry 32 in the washing and dewatering tub 2 so far is in a state as shown in FIG.

Step 303 While the washing and dewatering tub 2 is being rotated slowly, the water supply solenoid valve 20 is opened and tap water is directly supplied to the water inlet 19 to supply the tap water to the washing clothes 32 in the washing and dewatering tub 2. Spray. The laundry 32, which has been moistened by absorbing the sprayed tap water, is shown in FIG.
As shown in (b), the bulk is reduced. The spray amount of tap water at this time is controlled in accordance with the amount of the laundry 32 detected by the laundry amount detection, and is controlled so as to decrease when the amount of the laundry 32 is small and to increase as the amount increases.
The amount of tap water to be sprayed on the laundry 32 is, for example, about 3 L with respect to 60 L of washing water (standard water) required in the washing step when the amount of the laundry 32 is 4 kg. This is the amount of water for about 80% of the weight of the laundry 32. Water supply of this amount (3 L) is performed by adjusting the water supply flow rate of the water supply solenoid valve 20 to 20 L.
/ Min, it corresponds to the valve opening time of the water supply solenoid valve 20 of about 10 seconds.

Then, the apparatus is kept in a wet state for a predetermined time so that the tap water sufficiently penetrates into the laundry 32. The stationary time is controlled according to the amount of the laundry 32 and the amount of the tap water sprayed. During the deferred time to allow the sprinkled tap water to fully penetrate the laundry 32,
The washing and dewatering tub 2 may be in a stopped state, but it is preferable to rotate the washing and dewatering tub 2 at a low speed for about 1 minute in order to make the washing and dewatering immersed quickly.

Step 304 Tap water is further permeated into the fibers of the laundry 32 and
In order to drain excess tap water and uniformly sink the high-concentration detergent solution in the next step, the washing and dewatering tub 2 is rotated at a high speed to perform centrifugal dewatering. By this centrifugal spin-drying, the well-washed laundry garment 32 is deployed as shown in FIG. 4C so as to be pressed against the side wall of the washing and spin-drying tub 2.

Step 305 The water supply solenoid valve 2 is rotated while rotating the washing / dewatering tub 2 at a low speed.
0 is opened and a small amount of tap water (detergent dissolving water) is supplied to the detergent dissolving container 21 to dissolve the powdery synthetic detergent in the detergent dissolving container 21 which has been charged to generate washing water having a preferable detergent concentration. A concentrated detergent solution is generated and sprinkled from the water inlet 19 onto the washing clothes 32 in the washing and dewatering tub 2 to sink into the washing clothes 32. The preferred detergent concentration of the high-concentration detergent solution at this time will be described later. The laundry 32 in the washing and dewatering tub 2 is developed so as to be pressed against the side wall of the washing and dewatering tub 2 by centrifugal dehydration.
The high-concentration detergent liquid sprinkled from 9 is uniformly sprinkled on the laundry 32 and sinks as shown in FIG.

Step 306 The laundry 32 soaked and sprinkled with the high-concentration detergent liquid is left for a predetermined time. This deferral time is typically 4
The time is preferably up to 6 minutes, but if necessary, time adjustment control is performed to avoid discoloration. Details will be described later. When the laundry 32 soaked by soaking the high concentration detergent liquid is left standing, the chemical detergency of the detergent acts on the dirt on the laundry 32 as shown in FIG. improves.

Here, the improvement of the degree of cleaning and the discoloration by the high concentration detergent solution will be described.

The detergent concentration and alkalinity (PH value) of a detergent solution produced by dissolving a powder synthetic detergent in fresh water (tap water) are as follows:
As shown in FIG. 5, when the standard detergent concentration of washing water in which a detergent maker specified amount of a powdered synthetic detergent suitable for the washing process is dissolved is set as a standard (1 time), the alkalinity increases as the detergent concentration increases. , Alkalinity at standard detergent concentration (P
(H value) about 8.8, the alkalinity at a 20-fold higher detergent concentration is 11.8, which is about 1.34 times the alkalinity. As shown in FIG. 6, the amount of the surfactant that exerts a chemical detergency on the stains on the clothes increases as the detergent concentration increases.

FIG. 7 is a characteristic diagram showing the degree of soiling of clothes caused by the chemical power of the powdery synthetic detergent. This characteristic diagram is
When the dirt attached to clothes is immersed in tap water (fresh water) without applying mechanical force, and when immersed in detergent solution generated by dissolving powder synthetic detergent in tap water The relationship between each detergent concentration and the degree of dirt removal (cleaning degree) depending on the immersion time (stationary time) is shown. Here, the washing degree (washing degree index) of the laundry is evaluated based on a method defined in JIS standards. According to the JIS standard, the amount of washing water required to wash 1 kg of laundry using a designated standard washing machine is 20 L, and water is supplied with a detergent specified by JIS so that the detergent concentration becomes 0.2%. , 2
1. Remove stains when washing for 0 minutes.
The detergency is evaluated as 0. It is said that a general washing machine only needs to obtain a degree of cleaning of 0.8 or more.

A characteristic curve 701 shows the relationship between the immersion setting time and the degree of cleaning when the dirty clothes are immersed in tap water (fresh water) into which no detergent is added, and the characteristic curve 702 is 30 L.
Shows the relationship between the time of immersion in a detergent solution (detergent concentration is assumed to be 1) and the degree of cleansing produced by dissolving 20 g of a powder detergent in tap water, and the characteristic curve 703 shows the relationship between the detergent solution having a detergent concentration of 16 times. The characteristic curve 704 shows the relationship between the immersion stationary time and the degree of cleaning in a detergent solution having a detergent concentration of 22 times, and the characteristic curve 705 shows the relationship between the immersion stationary time and the degree of washing in a detergent solution having a detergent concentration of 28 times. 2 shows the relationship between the immersion time and the degree of cleaning. Considering this characteristic, when the dirt attached to clothes is removed by the chemical detergency of the detergent without applying mechanical force, the degree of dirt attached to the clothes (detergency) increases as the detergent concentration increases. You can see that it gets better. The detergent concentration of the high-concentration detergent solution for dissolving the powdered synthetic detergent to improve the degree of washing, and uniformly sprinkling and sinking the laundry 32 in the washing and dewatering tub 2 is about 5 to 30 times. is there. The high-concentration detergent solution having such a detergent concentration dissolves an amount of the powdered synthetic detergent set according to the amount of the laundry 32 and the amount of the wash water with 1/5 to 1/30 of the amount of the wash water. Thereby, it can be efficiently generated.

When the immersion and standing time is 4 minutes or more, the chemical power of the detergent can be effectively used. The cleaning degree is improved by increasing the immersion and standing time. However, considering the saturation characteristics and the washing time, and considering the subsequent mechanical washing by the stirring blade 4, it is desirable that the cleaning degree be within 7 minutes.

However, there is a possibility that discoloration of the laundry may be caused by the immersion of the laundry with the high-concentration detergent solution. This discoloration is due to the influence of a surfactant, a fluorescent agent, a whitening agent and the like contained in the detergent solution in which the powdered synthetic detergent is dissolved. The degree of discoloration varies depending on the cloth and the fastness to washing (fastness to dyeing). In a sensory evaluation test (evaluated by visual sensation), a large amount of discoloration occurs in colored or patterned materials of natural materials such as cotton, hemp and silk. are doing.

FIG. 8 exemplifies the relationship between the detergent concentration of the detergent solution, the standing time, and the discoloration sensory evaluation degree. Evaluation degree 3 is the degree of discoloration at which the user feels that the discoloration has changed considerably. In this example, in order to reduce the discoloration, the detergent concentration of the detergent liquid is desirably 30 times or less, and it is preferably 5 times or less for clothes in which discoloration is to be avoided. Then, in consideration of the saturation characteristics for improving the degree of cleaning, the immersion stationary time is preferably 5 to 10 minutes or less, and preferably 4 to 7 minutes.

Further, in the case of washing clothes in which discoloration is to be extremely avoided, control is performed such that immersion in a high-concentration detergent liquid which may cause such discoloration is omitted by initial setting. Specifically, steps 304 and 306 are omitted, and step 30
What is necessary is just to control to execute 3,305,307 continuously.

Step 307 The water supply solenoid valve 20 is opened to start supplying tap water (wash water). The water supply amount of the washing water is the amount determined in step 302, but is interrupted during the water supply to detect the quality of the laundry clothes 32. This suspended water level is a water level suitable for cloth detection set in advance in the microcomputer 17a.

Step 308: The laundry is detected and the washing process (washing process and rinsing process) is determined. In this cloth detection, the water supply is interrupted at a predetermined low water level, the motor 6a of the driving device 6 is energized for a short time to rotate the stirring blade 4, and the first deceleration characteristic in the inertia rotation at the time of deenergization is obtained. Then, the water supply is resumed, the water supply is resumed, the washing water is replenished to a predetermined high water level, the water supply is interrupted, the motor 6a of the driving device 6 is energized for a short time, and the stirring blades 4 are rotationally driven. A second deceleration characteristic during the inertial rotation of the washing clothes 32 based on the difference between the first attenuation characteristic and the second attenuation characteristic.
Detect the fabric quality. This cloth detection control is omitted when it becomes unnecessary by the initial setting. Then, the time and the water flow (the intensity of mechanical stirring) in the washing and rinsing steps are determined according to the fabric quality.

Step 309 Tap water is supplied up to the amount of water determined in step 302.
By this water supply, the washing water is diluted with the high-concentration washing liquid to have a preferable detergent concentration for washing. Thereby, the laundry 3
No. 2 is in a state of being immersed in predetermined washing water in the washing and dewatering tub 2 as shown in FIG.

Step 310 The driving device 6 is controlled so as to perform the washing process with the washing water flow and the washing time set in Step 308.

Here, the relationship between the washing time, the degree of washing, and the cloth entanglement ratio in the washing step will be described.

FIG. 9 shows the relationship between the washing time and the degree of washing. In the washing process, in order to remove dirt attached to the laundry 32, the stirring blade 4 is rotated forward and reverse to rotate the laundry 3.
2 to apply mechanical force. In addition, the detergent of the detergent 32 acts on the stains on the laundry 32. Characteristic curve 9
01 shows the case where the washing process is performed without performing the step of infiltrating and leaving the laundry 32 with the high-concentration detergent solution, and the characteristic curve 902 shows the case where the laundry 32 is infiltrated with the high-concentration detergent solution and left stationary. After the washing step is performed. In this embodiment, since the washing process is performed after the laundry 32 has been infiltrated with the high-concentration detergent solution and left standing, the washing rate of the characteristic curve 902 can be obtained. The required washing rate can be obtained in the washing time.

FIG. 10 shows the relationship between the washing time and the cloth entanglement ratio. A characteristic curve 1001 is obtained when the washing process is performed with a small mechanical force.
This is when the washing process is performed with a large mechanical force.
Since the mechanical force in the washing process is proportional to the magnitude of the stirring force (forward / reverse rotation angle) of the stirring blade 4, in order to generate a large mechanical force, the rotation angle of the stirring blade 4 increases and the The rate increases. In this embodiment,
Since the required detergency can be obtained with a small mechanical force, the washing step can be executed at the cloth entanglement rate of the characteristic curve 1001, and a cloth entanglement rate of 10% or less can be realized.

Step 311: Open the drain solenoid valve 27 to drain the washing water outside the machine.

Step 312: The water supply solenoid valve 20 is opened to supply rinsing water (tap water) to the set water amount.

Step 313 The drive device 6 is controlled to execute the rinsing process.

Step 314: The drain solenoid valve 27 is opened to drain the rinsing water out of the machine.

Step 315 The water in the laundry 32 is centrifugally dehydrated by rotating the washing / dewatering tub 2 at a high speed with the drain electromagnetic valve 27 kept open. In the state where the centrifugal spin-drying has been completed, the laundry clothes 32 are pressed against and adhered to the side wall of the washing and spin-drying tub 2.

Step 316 The blower 23 is operated while the washing and dewatering tub 2 is rotated forward and backward at a low speed, and the outside air sucked from the intake port 22 is heated by the heater 24 to be washed and removed through the blowing duct 25. Blow into the water tank 2. The warm air blown into the washing and dewatering tub 2 removes moisture from the clothes 32 in the washing and dewatering tub 2 and diffuses out of the machine to dry the clothes 32 with warm air. Since this hot air drying requires a time of 100 minutes or more, when the laundry 32 is centrifugally dewatered and dried with hot air while being attached to the side wall of the washing and dewatering tub 2, wrinkles are generated on the laundry 32. For this reason, during the drying time, the agitating blades 4 are periodically rotated forward and reverse to move the laundry 32 to dry.

The humid air 34 during drying is discharged to the outside of the machine through the dewatering hole 2a provided in the side wall of the washing and dewatering tub 2 through the gap between the outer tub 5 and the washing and dewatering tub 2. Has become.

If the cloth entanglement ratio is 10% or less, unevenness of drying and generation of wrinkles can be prevented even if hot air drying is performed as described above after the final dehydration.

The above-described embodiment is a fully automatic washing and drying machine. However, when the present invention is applied to a washing machine without a drying function, the hot air drying mechanism and the control processing are omitted to achieve the same. Can be implemented.

Further, with respect to washing and rinsing, different systems can be adopted respectively.

Further, as the high-concentration detergent solution, a solution which has been previously produced (produced) at the above-mentioned concentration can also be used.

[0092]

According to the present invention, the detergent concentration of the washing water is 5-30.
Double the concentration of detergent liquid in the laundry and soak it in the laundry to effectively exert the chemical detergency of the detergent, effectively reducing the mechanical power applied to the laundry in the washing process. can do.

The present invention also relates to a fully automatic washing machine for drying laundry clothes dehydrated in a washing and dewatering tub by blowing warm air into the washing and dehydrating tub, wherein the detergent concentration is 5 to 30 times the detergent concentration of the washing water. The high-concentration detergent liquid is submerged in the laundry and left to stand, so that the chemical detergency of the detergent is effectively exerted, and the mechanical force acting on the laundry in the washing process is reduced. It is possible to reduce the entanglement of the laundry in the washing and dewatering tub without deteriorating the falling, thereby reducing uneven drying.

Further, in the present invention, a high-concentration detergent solution having a desired detergent concentration is produced by dissolving an amount of powder detergent set according to the detected amount of laundry, so that the powder detergent can be used efficiently. As a result, a high-concentration detergent solution and washing water having a preferable detergent concentration can be produced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view of a fully automatic washing machine according to the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the fully automatic washing machine shown in FIG.

FIG. 3 is a flowchart of a control process of a washing, spin-drying and drying process executed by a microcomputer in a control unit of the fully automatic washing machine shown in FIG. 1;

FIG. 4 is a vertical sectional side view of the washing and dewatering tub showing a state of the laundry in the washing and dewatering tub in the control process shown in FIG. 3;

FIG. 5 is a characteristic diagram showing the detergent concentration and alkalinity of a detergent solution produced by dissolving a powder synthetic detergent.

FIG. 6 is a characteristic diagram showing a detergent concentration and a surfactant amount of a detergent solution produced by dissolving a powder synthetic detergent.

FIG. 7 is a characteristic diagram showing the relationship between the immersion stationary time and the degree of cleaning when the detergent concentration is changed with respect to dirt attached to clothing.

FIG. 8 is a characteristic diagram illustrating the relationship between the detergent concentration of the detergent solution, the deferment time, and the degree of discoloration sensory evaluation in immersion stationary with a high-concentration detergent solution.

FIG. 9 is a characteristic diagram showing a relationship between a washing time and a washing degree.

FIG. 10 is a characteristic diagram showing a relationship between a washing time and cloth entanglement.

[Explanation of symbols]

2 ... Washing and dewatering tank, 4 ... Agitating blade, 6 ... Drive device, 14 ...
Operation panel, 16: control unit, 19: water inlet, 20: solenoid valve for water supply, 21: detergent dissolving container, 23: blower, 24: heater, 25: air duct.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tomoko Teruyama 1-1-1, Higashitaga-cho, Hitachi City, Ibaraki Prefecture F-term in Hitachi Taga Electronics Co., Ltd. 3B155 AA10 AA12 AA21 CA06 CB07 GA28 GB03 GB10 LA02 LB02 LB18 LB34 MA01 MA05 MA06 MA07 MA08

Claims (18)

[Claims] A washing / drying machine for sequentially executing each step of washing with washing water, rinsing with rinsing water, centrifugal dehydration and hot air drying for laundry in a washing and dewatering tub, A dipping step in which the liquid is submerged in the washing clothes in the washing and dewatering tub and kept for a predetermined time, and a washing step of applying mechanical force to the laundry clothes in the washing water diluted with detergent liquid by supplying water after the dipping step, A washing / drying machine comprising: a rinsing and dehydrating step; and a drying step of supplying hot air into a washing and dehydrating tub to dry dehydrated laundry. 2. The high-concentration detergent liquid according to claim 1, wherein
A washing / drying machine characterized in that a powder detergent is dissolved in detergent-dissolved water to produce a concentration higher than the detergent concentration dissolved in the wash water in the washing step. 3. The washing and drying machine according to claim 1, wherein the detergent concentration of the high-concentration detergent solution is 5 to 30 times the detergent concentration of the washing water in the washing step. 4. The washing and drying machine according to claim 1, wherein the stationary time is adjusted in accordance with the quality of laundry and / or the fastness of washing. 5. The washing and drying machine according to claim 1, wherein the stationary time is 4 to 7 minutes. 6. A washing and drying machine according to claim 1, wherein the washing and dewatering tub is kept stationary during the immersion step. 7. The washing and dewatering tub according to claim 1, wherein the garments in the washing and dewatering tub are wetted and centrifugally dehydrated to spread the laundry to the side wall of the washing and dewatering tub. A washing and drying machine characterized in that a high concentration detergent solution is sprinkled while the washing and dewatering tub is rotated at a low speed so as to be immersed in washing clothes. 8. The detergent dissolving method according to claim 1, wherein the amounts of the washing water and the powder detergent are set according to the amount of the laundry, and the powder detergent is dissolved to form a high-concentration detergent solution. A washing and drying machine characterized in that the amount of water is set according to the quality of washing clothes and / or the fastness of washing. 9. Washing and rinsing steps are performed by infiltrating laundry clothes in the washing and dewatering tub with a high-concentration detergent solution and supplying water thereto.
In a washing machine that subsequently performs a dehydration step, a high-concentration detergent solution of 5 to 30 times the detergent concentration of the wash water in the washing step is immersed in the laundry and left for a predetermined time, and then the wash water is supplied to the washing step. A washing machine characterized in that a washing machine is started. 10. The washing machine according to claim 9, wherein the high-concentration detergent solution is formed by dissolving powder detergent put in a detergent dissolution container with detergent dissolving water. 11. The washing and dewatering tub according to claim 9 or 10, wherein the high-concentration detergent liquid is caused to flow down into the washing and dehydrating tub while rotating the washing and dehydrating tub containing the laundry and rotating at a low speed. A washing machine characterized by the following. 12. A washing and dewatering tub according to claim 9, wherein the washing and dewatering tub is sprinkled with water while rotating the washing and dewatering tub at a low speed before sprinkling with a high-concentration detergent solution. A washing machine wherein the washing and dewatering tub is rotated at a high speed and centrifugally dewatered after the drying. 13. The washing and dewatering tub according to claim 12, wherein the washing and dewatering tub is rotated at such a low speed that the high concentration detergent liquid immersed in the laundry is not centrifugally dewatered during the stationary time. Machine. 14. A washing machine according to claim 9, wherein said washing and dewatering tub is kept stationary during said stationary time. 15. The washing machine according to claim 9, wherein the stationary time is 4 to 7 minutes. 16. The washing machine according to claim 9, wherein the stationary time is adjusted according to the quality and / or the fastness of the laundry. 17. The washing and dewatering tub according to any one of claims 9 to 15, wherein the washing garment in the washing and dewatering tub is wetted and centrifugally dehydrated to spread the laundry to the side wall of the washing and dewatering tub. A washing machine characterized in that a high concentration detergent solution is sprinkled while rotating the washing and dewatering tub at a low speed. 18. The detergent dissolving method according to claim 9, wherein the amounts of the washing water and the powder detergent are set in accordance with the amount of the laundry, and the powder detergent is dissolved to form a high-concentration detergent solution. A washing machine characterized in that the amount of water is set according to the quality of washing clothes and / or the fastness of washing.