KR100439929B1 - Washing machine and washing-and-drying machine - Google Patents

Abstract

The mechanical force acting on the laundry during the washing process is reduced. A high concentration detergent solution having a detergent concentration of 5 to 30 times the detergent concentration of the wash water is produced by dissolving a powder detergent in a small amount of detergent dissolved water, the laundry is immersed (infiltrated) with a high concentration detergent solution and the laundry is attached to the laundry. It is left in the immersion state to increase the cleaning efficiency by using the chemical cleaning power of the detergent acting at the time. In doing so, the mechanical force acting on the laundry is reduced in subsequent washing.

Description

Washing machine and laundry dryer {WASHING MACHINE AND WASHING-AND-DRYING MACHINE}

The present invention relates to a washing machine and a laundry dryer.

The automatic washing machine detects the amount of laundry put into the washing and dewatering tank, inputs a detergent amount corresponding to the amount of laundry to be washed, and tap water (washing water) corresponding to the amount of laundry in the washing process. After supplying the amount of water by rotating the stirring impeller in the forward and reverse direction or by rotating the washing and dehydration tank in one direction or the forward and reverse direction to perform the washing by applying a mechanical force to the laundry, and supplying tap water (rinse water) By similarly performing a rinsing process to apply a mechanical force to the laundry, it is configured to have a step of performing a dehydration process to dehydrate the rinsing water contained in the laundry by centrifugal force by rotating the washing and dehydration tank. The laundry dryer performing the drying is further configured to perform a hot air drying process of drying the rinsed laundry by blowing hot air after the foregoing steps.

In such a fully automatic washing machine or laundry dryer, the amount of powdered synthetic detergent dissolved in the washing water during the washing process is about 40g / 60L (amount of detergent / amount of washing water) and the detergent concentration in the washing water is about 0.07%. to be.

In order to remove the adhered to the laundry using such a low detergent concentration wash water, the mechanical force applied to the laundry need to be strengthened by increasing the rotational time of the stirring impeller or washing and dehydrating tank or by extending the washing time. have. As a result, the laundered laundry is badly worn or torn or the laundry is severely entangled.

If the laundry is severely entangled, the laundry nonuniformity is increased and it is difficult to remove the laundry from the laundry. In addition, in the case of a laundry dryer, the mechanical forces acting on the laundry need to be weakened in order to perform the hot air drying, because if the laundry is severely entangled, the hot air drying in the washing and dehydrating tank Because it becomes difficult. As a result, there is a disadvantage that the dirt is not easily removed.

For example, Japanese Patent Application Laid-open No. Hei 7-80182 describes the chemical composition of a high concentration detergent solution by adding a preliminary dipping process to wet the laundry to a high concentration detergent solution before the washing process to reduce the mechanical force applied to the laundry during the washing process. Disclosed is a fully automatic washing machine utilizing the cleaning power. In addition, Japanese Patent Application Laid-open No. 8-47594 discloses a washing machine which soaks laundry in washing water of high detergent concentration or washes laundry using washing water of high detergent concentration.

However, in these conventional washing machines, a specific configuration for effectively exerting the chemical cleaning power of the detergent has not been described.

An object of the present invention is to propose a washing machine that can effectively reduce the mechanical force applied to the laundry during the washing process by effectively exerting the chemical cleaning power of the powder detergent using the powder detergent.

Another object of the present invention is to propose a washing machine capable of effectively exerting a chemical cleaning power of a powder detergent and preventing discoloration (discoloration) of laundry.

It is another object of the present invention to reduce the unevenness of drying by increasing the drying efficiency by reducing the entanglement of the laundry laundry in the washing and dehydration tank without weakening the time to remove, washing by blowing hot air in the washing and dehydration tank The present invention also proposes a laundry dryer capable of drying laundry dehydrated by a dehydration tank.

Another object of the present invention is to prevent excessive use of powder detergent by efficiently producing an appropriate high concentration detergent solution using powder detergent.

In the present invention, a high concentration detergent solution having a detergent concentration of 5 to 30 times the detergent concentration of the wash water is produced by dissolving the powder detergent in a small amount of detergent dissolved water, and the laundry is immersed (infiltrated) with the high detergent solution and washed. The silver is left in the immersion state to increase the cleaning efficiency by using the chemical cleaning power of the detergent acting when attached to the laundry. By doing so, the mechanical force acting on the laundry is reduced during the subsequent laundry.

In addition, preferred chemical cleaning powers are made to act on the laundry by adjusting the concentration of the high concentration detergent solution to wet the laundry and the time to soak the laundry depending on the nature of the laundry (cloth properties, color and pattern, dyeing durability).

In addition, the desired cleaning power is efficiently produced in a high concentration detergent solution to wet the laundry by adjusting the amount of detergent dissolved water for dissolving the powder detergent according to the amount of laundry.

More specifically, the present invention is to rotate the stirring blade to apply a mechanical force to the laundry clothes in the washing and dewatering tank to perform each step of washing with washing water and rinsing with rinsing water, A washing machine which performs a process of rotating and centrifugal dehydration of the laundry clothes in the said washing and dewatering tank WHEREIN: The 1st process of rotationally driving the said stirring blade and detecting the deceleration characteristic in inertia rotation, and the high concentration after the said 1st process A second step of infiltrating the detergent liquid into the laundry garment in the washing and dewatering tank and placing it for a predetermined time; and a third step of supplying water after the second step and rotationally driving the stirring blade to detect damping characteristics in inertia rotation. Washing and applying mechanical force to the laundry clothes in the washing water in which the detergent solution is diluted by supplying water after the third step; Characterized in that one to run the process and the squeezing process gum. In addition, the present invention is characterized by a laundry dryer configured to perform a drying process for supplying warm air to the washing and dehydrating tank to dry the laundry clothes. The washing process using the washing water, the rinsing process using the rinsing water, the dehydration process using the centrifugal force, and the hot air drying process are sequentially performed, and the laundry is wetted with a high concentration detergent solution in the washing and dehydrating tank, and the laundry for a predetermined time. The soaking process of leaving the solution in the immersion state, the washing process of applying mechanical force to the laundry in the wash water by diluting the detergent solution with the feed water after the soaking process, rinsing and dehydrating the washed laundry, The laundry dryer further performs a drying process of drying the dehydrated laundry by supplying hot air into the dehydration tank. It characterized.

The present invention is characterized in that the high concentration detergent solution is also produced higher than the detergent concentration of the detergent solution mixed in the wash water during the washing process, and the detergent solution is obtained by dissolving the powder detergent in the detergent dissolved water.

In addition, the present invention is characterized in that the detergent concentration of the high concentration detergent solution is 5 to 30 times the detergent concentration of the wash water during the washing process.

In addition, the present invention is characterized in that the time to wet the laundry is adjusted according to the nature of the laundry and / or laundry durability.

In addition, the present invention is characterized in that the time to wet the laundry is 4 to 7 minutes.

In addition, the present invention is characterized in that the washing and dehydration tank is kept in a stopped state during the immersion process.

In addition, the present invention is unfolded as if pressed against the side wall of the washing and dehydration tank by dehydration by centrifugal force after the laundry is wet, in this state, the high concentration detergent solution is rotated at low speed so that the washing and dehydration tank to wet the laundry with a high concentration detergent solution It is characterized in that the spray during.

In addition, the present invention is the amount of wash water and powder detergent is set according to the amount of the laundry, the amount of detergent dissolved water for producing a high concentration detergent solution by dissolving the powder detergent is set according to the nature of the laundry and / or wash durability It is characterized by.

In addition, the present invention performs a washing and rinsing process by supplying water after the laundry in the washing and dehydrating tank is wet with a high concentration detergent solution, in the washing machine to perform the dehydration process, the laundry detergent concentration of the wash water during the washing process It is characterized in that the washing process is moistened with a high concentration detergent solution having a detergent concentration of 5 to 30 times and the laundry is soaked for a predetermined time, and then by supplying the wash water.

In addition, the present invention is characterized in that the high concentration detergent solution is produced by dissolving the powder detergent put into the detergent dissolution container containing the detergent dissolved water.

In addition, the invention is characterized in that it is configured to flow into a wash and dewater bath containing the laundry such that the high concentration detergent solution is sprayed onto the wash while the wash and dewater bath is rotating at low speed.

In addition, the present invention is characterized in that before washing the high concentration detergent solution, the laundry in the washing and dehydrating tank is soaked with water sprayed while the washing and dehydrating tank is rotated, and dehydrated by centrifugal force by rotating the washing and dehydrating tank at high speed. .

In addition, the present invention is characterized in that the washing and dehydration tank is rotated at a low speed so that the detergent solution absorbed into the laundry during the time to leave the laundry in a wet state is not dehydrated by the centrifugal force from the laundry.

In addition, the present invention is characterized in that the washing and dehydration tank is kept in a stopped state during the immersion process.

In addition, the present invention is characterized in that the time to leave the laundry in a wet state is 4 to 7 minutes.

In addition, the present invention is characterized in that the time to leave the laundry in a wet state is adjusted according to the nature and / or wash durability of the laundry.

In addition, the present invention wets the laundry in the washing and dehydration tank and dehydrated by centrifugal force, the laundry is spread as if the laundry is pressed against the side wall of the washing and dehydration tank, and in this state the laundry is rotated while the washing and dehydration tank is rotating at a low speed. The high concentration detergent solution is characterized in that the spray is soaked with a high concentration detergent solution.

In addition, the present invention is that the amount of wash water and powder detergent is set according to the amount of laundry, the amount of detergent dissolved water for producing a high concentration detergent solution by dissolving powder detergent is set according to the nature of the laundry and / or the durability of the laundry. It features.

1 is a vertical sectional view showing a fully automatic washing machine according to the present invention.

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

3 is a flow chart for controlling the washing, dehydration and drying process performed by the microcomputer in the control unit of the fully automatic washing machine shown in FIG.

4A, 4B, 4C, 4D, 4E, and 4F are vertical sectional views of the washing and dewatering tank showing the state of the laundry in the washing and dewatering tank in the control process shown in FIG.

5 is a graph showing the relationship between detergent concentration and alkalinity in detergent solutions produced by dissolving powdered synthetic detergents.

6 is a graph showing the relationship between detergent concentration of detergent solution and amount of surfactant produced by dissolving powder synthetic detergent.

FIG. 7 is a graph showing the relationship between the time to wet the laundry when the detergent concentration is changed and the cleanliness when attached to the laundry. FIG.

FIG. 8 is a graph showing the relationship between the detergent concentration of a high detergent solution, the time to wet the laundry and the degree of physical discoloration when the laundry is immersed in the high detergent solution.

9 is a graph showing the relationship between washing time and cleanliness.

10 is a graph showing the relationship between washing time and entanglement rate of laundry.

<Explanation of symbols for the main parts of the drawings>

2: washing and dehydrating tank

6: drive unit

8: vibration blocking device

13: power switch

14: operation panel

16: control unit

19: injection port

20: water supply solenoid valve

21: detergent dissolution container

22: suction port

23: blower

24: heater

25: air injection duct

Since the laundry is immersed (infiltrated) by the high concentration detergent solution, the chemical detergency of the powdered detergent acts when it is attached to the laundry to perform a cleaning action, and the mechanical force acting on the laundry can be reduced in subsequent laundry. Chemical detergency is influenced by the detergent concentration of the high detergent solution absorbed in the laundry and by the time the laundry is soaked.

Since the amount of powder detergent used for washing is adjusted according to the amount of laundry, the supply of the amount of detergent dissolved water is preferably adjusted according to the amount of powder detergent in order to produce a high concentration detergent solution suitable for generating the desired chemical cleaning power. .

In addition, some laundry may be discolored (discolored) when immersed in a high concentration detergent solution. If you wash such laundry that may cause discoloration, reduce the detergent concentration in the high-density detergent solution that soaks the laundry, shorten the time to soak the laundry, eliminate the step of soaking the laundry, or use a high-density detergent solution. It is desirable to eliminate the soaking step.

In addition, discoloration of the laundry due to the high concentration detergent solution may be because the laundry is unevenly immersed in the high concentration detergent solution. Therefore, it is preferable that the high concentration detergent solution is sprayed onto the wet and unfolded laundry so that the laundry is uniformly wetted with the high concentration detergent solution.

Hereinafter, an embodiment of a fully automatic laundry dryer including the gist as described above will be described.

1 is a vertical sectional view showing an embodiment of a fully automatic washing machine according to the present invention.

Referring to Fig. 1, reference numeral 1 denotes a frame body forming an outer case. Reference numeral 2 is a washing and dewatering tank including a channel hole 2a on the outer circumferential wall and a hydraulic balancer 3 in the upper outer circumference, wherein the stirring impeller 4 is rotatably installed in the bottom. Reference numeral 5 denotes an external drum for accommodating the washing and dewatering tank 2 therein, the external drum 2 mounting the drive unit 6 on the outside of the floor via a mounting base 7 made of steel and It is suspended and supported by the vibration isolator 8 from four corners of the upper end of the outer frame 1. The drive unit 6 includes a motor, a clutch mechanism and a reduction gear mechanism. By using a motor, a clutch mechanism and a reduction gear mechanism, mechanical forces are applied to the laundry during the washing process and the rinsing process by rotating the stirring impeller 4, and the laundry in the laundry drying drum 2 rotates the drum during the dehydration process. Is dehydrated through centrifugal force.

The upper cover 9 having the laundry inlet opening 9a is fitted to the edge portion of the upper opening of the frame body 1 so as to cover the upper opening and together with the front panel 10 and the rear panel 11 by attachment screws. It is attached to the frame body 1.

The front panel box 12 between the top cover 9 and the front panel 10 includes a power switch 13, an operation panel 14 having a group of input switches and a group of display elements, and an external drum 5 The water level sensor 15 and the control unit 16 which generate the water level signal corresponding to the water level inside are accommodated. These constitute a control system.

In the rear panel box 17 formed between the upper cover 9 and the rear panel 11, washing water supply means, high concentration detergent solution generating means, and dry hot air supply means are provided and arranged in a row.

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

The high concentration detergent solution generating means supplies the detergent dissolving water to the detergent dissolving vessel 21 from the above-described washing water supply solenoid valve 20, and while stirring the powdered synthetic detergent added to the detergent dissolving vessel 21 together with the detergent dissolving water. It is configured to produce a high concentration detergent solution by dissolving and supplying it to the above-described wash water injection port 19.

The dry hot air supply means is configured to heat the air sucked from the suction port 22 by the blower 23 and then blow it into the washing and dewatering tank 2 through the air injection duct 25. The washing water injection port 19 is formed to inject washing water toward a position near an inner corner of the opening of the washing and dewatering tank 2.

The laundry input opening 9a formed in the upper cover 9 is covered with the cover 26 so as to be opened and closed. The drain port 5a formed at the bottom of the outer drum 5 is connected to the drain hose 28 via a drain valve 27, and the air trap 5b is connected to the water level sensor 15 through the air tube 29. Is connected to. A base 31 formed of a synthetic resin having legs 30 at four corners is attached to the bottom end edge of the frame body 1.

Reference numeral 32 denotes laundry to be put into the washing and dehydrating tank (2).

2 is a circuit block diagram showing the electrical structure of a fully automatic washing machine.

The control unit 16 is constituted by placing the microcomputer 16a at the center and has a power supply circuit 16b; A power relay 16c; A group of control semiconductor alternating current switching elements (FLS) for supplying electricity to the drive unit, the water supply solenoid valve 20, the drain solenoid valve 27, the detergent stirring motor 21a, the blower 23, and the heater 24 is provided. And a driving circuit 16d.

In power control to the stator windings of the motor 6a in the drive unit 6, the drive circuit 16d uses two semiconductor alternating current switching elements (FLS) 16d1 for reverse control and reverse electromagnetic brake. 16d2). Reference numeral 16d1 denotes a semiconductor alternating current switching element for the forward rotation power control, and reference numeral 16d2 denotes a semiconductor alternating current switching element for the reverse rotation power control and the reverse rotation electromagnetic brake. In addition, in controlling the power supply to the solenoid coil 6b of the clutch mechanism in the drive unit 6, in order to induce a direct current drive current suitable for generating a large electromagnetic force, the drive circuit 16 is connected with the rectifier diode bridge 16d3. And a phase controller FLS 16d4 for controlling the magnitude of the driving current.

Further, reference numeral 6c denotes a rotation sensor for detecting rotation of the motor 6a, and reference numeral 33 denotes a split-phase capacitor of the motor 6a.

In addition, the drive circuit 16d includes 16d5 of FLS for controlling electric power supplied to the water feed solenoid valve 20, the drain solenoid valve 27, the detergent stirring motor 21a, the blower 23, and the heater 24. 16d9. The drive circuit 16 performs power supply control corresponding to the load by controlling the current induction of 16d1 to 16d9 of the FLS in accordance with an instruction from the microcomputer 16a.

When the switch 13 is turned on to close the power relay 16c, the microcomputer 16a starts a preinstalled control processing program and is in a standby state. Then, the microcomputer 16a captures the input signals from the input switch 14a group of the operation panel 14 and the water level sensor 15 and the rotation sensor 6c, and the display element 14b group. By controlling the drive circuit 16d, washing, rinsing, dehydration and hot air drying of the laundry are performed, respectively.

The group of input switches 14a of the operating panel 14 includes a cloth property setting switch, which is one for setting information on efficiently generating chemical cleaning power by soaking laundry with a high concentration detergent solution; Laundry durability (dye durability) setting switch, cloth type (shape, color, and pattern) setting switch; And a washing mode setting switch. In addition, the washing mode setting switch includes a switch for setting a washing mode that eliminates the process of soaking the laundry with a high concentration detergent solution and washing the laundry.

Hereinafter, the laundry washing, rinsing, dehydration and hot air drying processes will be described with reference to an example in which the laundry is soaked in a high concentration detergent solution and the laundry is immersed in the chemical cleaning power of the detergent.

3 is a flowchart of the washing, rinsing, dehydrating and drying process performed by the microcomputer 16a of the control unit 16.

The microcomputer 16a performs the following control process when the washing start button in the switch 14a group is pressed.

Step 301

When the laundry 32 is put into the washing and dewatering tank 2 and the initial setting is performed by operating the input switch 14a group of the operation panel 14, and the washing start button is pressed, the washing, rinsing, dehydrating and drying process is performed. Automatic control processing is started.

In the initial setting, information is set on avoiding discoloration due to wet laundry 32 with a high concentration detergent solution and leaving the laundry wet. In particular, cloth properties, washing durability (dyeing durability), types of cloth (shape, color and pattern), washing mode, and the like are set as necessary.

Step 302

Detection control processing of the amount of laundry 32 is performed. The detection of the amount of laundry is performed in such a way that the stirring impeller 4 is driven by operating the motor 6a of the drive unit 6 for a short time in a dry laundry state before watering, and the amount of laundry is turned off It is detected based on the deceleration characteristic of the stirring impeller during the coasting rotation of. The amount of wash water and the amount of powder detergent for producing wash water having a desired detergent concentration are determined by performing calculations based on the detected results (amount of laundry), and the amount of powder detergent is indicated by the display element 14b group and The determined amount of the powder synthetic detergent is put into the detergent dissolving vessel 21. In the process so far, the form of the laundry 32 in the washing and dewatering tank 20 is in the state shown in FIG. 4A.

Step 303

The tap water is supplied directly to the wash water injection port by opening the water supply solenoid valve 20 while the washing and dewatering tank 2 is rotated to spray the tap water onto the laundry 32 in the washing and dewatering tank 2. By absorbing the sprinkled tap water, the volume of the wet laundry 32 is reduced as shown in FIG. 4B. At this time, the amount of tap water sprayed is set to a small amount when the amount of the laundry 32 is small, and is controlled according to the amount of the laundry 32 detected by the laundry amount detector so that the amount of the laundry 32 increases. For example, if the amount of the laundry 32 is 4 kg, the amount of tap water sprayed on the laundry 32 is set to about 3 L, but the amount of washing water (standard washing water amount) required during the washing process is 60 L. This amount corresponds to about 80% by weight of the laundry 32. If the feedwater flow rate of the feedwater solenoid valve 20 is 20L / min, this amount of 3L of feedwater corresponds to the valve opening time of about 10 seconds of the feedwater solenoid valve 20.

Thereafter, the laundry 32 is soaked wet for a preset time so that the tap water can sufficiently penetrate the laundry. This holding time is controlled according to the amount of laundry 32 and the amount of tap water sprayed. During the time for the sprayed tap water to fully penetrate into the laundry 32, the washing and dewatering tank 2 remains stationary, but to accelerate the infiltration, the washing and dewatering tank 2 is kept at a low speed for about 1 minute. It is preferable to rotate.

Step 304

In order to more sufficiently infiltrate the tap water into the laundry and drain the excess water, and to uniformly wet the laundry with the high concentration detergent solution in the next process, the washing and dewatering tank 2 is rotated at high speed to perform dehydration by centrifugal force. By dehydration by centrifugal force, the wet laundry 32 is in an unfolded state as if the laundry is pressed against the side wall of the washing and dewatering tank 3 as shown in Fig. 4C.

Step 305

A small amount of tap water (detergent dissolved water) is rotated while the washing and dehydrating tank 2 is rotated at a low speed so as to make a high concentration detergent solution by dissolving the powder detergent put into the detergent dissolving vessel 21 to make the washing water of the desired detergent concentration. The water supply solenoid valve 20 is opened, and is supplied to the detergent dissolution container 21. The resulting high concentration detergent solution is sprayed to the laundry 32 in the washing and dewatering tank 2 through the washing water injection port 19 to wet the laundry 32. The preferred detergent concentration of the high concentration detergent solution at this time will be described later. Since the laundry 32 in the washing-and-dehydrating tank 2 unfolds as if the laundry 32 is pressed against the sidewall of the washing-and-dehydrating tank 2, the laundry 32 is washed as shown in FIG. 4D. It is evenly sprayed and wetted with a high concentration detergent solution injected from the injection port 19.

The laundry 32 sprayed and moistened with a high concentration detergent solution is left for a preset time. A suitable time for leaving the laundry wet is generally 4 to 7 minutes, but time adjustment control should be performed to prevent discoloration as necessary. Details will be described later. During the time when the laundry 32 is wetted with a high concentration detergent solution and left wet, the chemical cleaning power of the detergent acts at the time of the laundry 32 to enhance the cleanliness.

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

FIG. 5 is a graph showing the relationship between detergent concentration and alkalinity (pH value) of detergent solution made by dissolving powder synthetic detergent in fresh water (tap water). As shown in FIG. 5, when the standard detergent concentration of the wash water including the quantification of the detergent manufacturer of the powder detergent suitable for the washing process is defined as the standard value (1 times), the alkalinity (pH value) is increased as the detergent concentration increases. Increases accordingly. The alkalinity (pH value) of the standard detergent concentration is about 8.8, but the alkalinity (pH value) of the 20-fold high concentration detergent is 11.8, which is about 1.34 times higher than the standard detergent concentration. As shown in Fig. 6, the amount of the surfactant which acts at the time of laundry to exert chemical cleaning power increases with increasing detergent concentration.

7 is a graph showing the degree of removing the adhered to the laundry by the chemical cleaning power of the powder detergent. This graph shows the immersion time (laundry) when the soiled laundry was wetted in tap water (fresh water) without using mechanical force, and in each case the laundry was soaked in the detergent solution produced by dissolving the powdered synthetic detergent in the tap water. Shows the relationship between time to leave wet) and time to clean (cleanness). Here, the cleanliness (cleaning index) of the laundry is evaluated based on the method defined by Japanese Industrial Standards (JIS). In JIS, the cleaning power is set to 20 L of the washing water required for 1 kg of laundry using a specific standard washing machine, and the washing water is supplied so that the detergent concentration is 0.2% using JIS detergent. By elimination as defined by 1.0. Ordinary washing machines are considered to be suitable if a cleaning power of 0.8 or more can be obtained.

The characteristic curve 701 shows the relationship between the time to wet the laundry and the cleanliness when the dirty laundry is soaked in tap water without adding detergent, and the characteristic curve 702 shows the time to leave the laundry wet and the dirty laundry. Shows the relationship between the cleanliness of a detergent solution produced by dissolving 20 g of powdered detergent in 30 L of tap water (doubled detergent concentration), and the characteristic curve 703 shows the time to wet the laundry. The relationship between the cleanliness when soiled laundry is moistened with a detergent solution with a detergent concentration of 16 times is shown, and the characteristic curve 704 shows the time to wet the laundry and the detergent solution with the detergent concentration with a detergent concentration of 22 times. The relationship between the cleanliness of the wetness is shown, and the characteristic curve 705 shows the time to wet the laundry and the dirty solution to a detergent solution having a detergent concentration of 28 times. Show the relationship between cleanliness when wet. From these characteristic curves, it can be seen that when the adherence to the laundry is removed by chemical cleaning without using mechanical force, the degree of removal (cleanness) when attached to the laundry improves with increasing detergent concentration. . The preferred detergent concentration of the high concentration detergent solution uniformly sprayed to wet the laundry 32 in the laundering and dehydration tank 2 to enhance cleanliness by dissolving the powdered synthetic detergent is about 5 to 30 times. High concentration detergent solution having such a detergent concentration can be efficiently produced by dissolving the amount of the powdered synthetic detergent set in accordance with the amount of laundry and the amount of wash water in a small amount of water of about 1/5 to 1/30 of the wash water. have.

In addition, by setting the time to wet the laundry to a value of 4 minutes or more, the cleaning power of the detergent can be effectively used. Cleanliness can be improved by increasing the time to wet the laundry, but the cleanliness has a saturation characteristic, the washing time can be long, and the laundry after taking into account that the mechanical washing after the use of the stirring impeller 4 can cause problems It is preferable to set the time of soaking to a value of 7 minutes or less.

However, moistening the laundry with a high concentration of detergent solution may lead to discoloration of the laundry. The discoloration is due to the effects of surfactants, fluorescent agents, bleaches and the like contained in the detergent solution in which the powder synthetic detergent is dissolved. The degree of discoloration depends on the fabric properties and wash durability (dye durability), and, according to physical evaluation tests (visual evaluation), discoloration is often found in fabrics with dyes and patterns made from natural materials such as cotton, hemp and silk do.

Fig. 8 shows the relationship between the detergent concentration of the detergent solution, the time to wet the laundry and the degree of discoloration evaluated physically, and the degree of discoloration of about 3 is a feeling that a lot of discoloration is felt. In this example, in order to reduce discoloration, the detergent concentration of the detergent solution is preferably 30 times or less, and in the case of the cloth in which it is desirable to avoid discoloration, it is particularly preferable that the detergent concentration of the detergent solution is 5 times or less. In addition, in consideration of the saturation characteristics to enhance the cleanliness, the time to wet the laundry is preferably 5 to 10 minutes, particularly preferably 4 to 7 minutes.

In addition, when washing laundry which is extremely desirable to avoid discoloration, it can be controlled to avoid soaking the laundry with a high concentration detergent solution which may cause discoloration. Specifically, control omits step 304 and step 306 and step 303, step 305 and step 307 are performed in series.

Step 307

Tap water (washing water) starts to be supplied by opening the water supply solenoid valve 20. The amount of wash water supplied is the amount determined in step 302. The supply of wash water is paused midway to detect the cloth properties of the laundry. This paused water level is a level suitable for detecting cloth properties preset in the microcomputer 17a.

Step 308

Cloth properties are detected to determine the washing process (washing process and rinsing process). Detection of cloth properties is performed as follows. That is, the water supply is stopped at the predetermined water level, the stirring impeller 4 is driven to rotate by applying a voltage to the motor 6a of the drive unit 6 for a short time, and the first of the stirring impeller during the inertia rotation when the power is cut off. The deceleration characteristic is detected. Thereafter, the water supply is resumed and the washing water is supplied. When the water level reaches the predetermined level, the water supply is stopped again, and the stirring impeller 4 is driven to rotate by applying a voltage to the motor 6a of the drive unit 6 for a short time, and stirs during the inertia rotation when the power is cut off. The second deceleration characteristic of the impeller is detected. The cloth property of the laundry 32 is detected based on the difference between the first and second deceleration characteristics. If the cloth detection control is set to the initial setting as unnecessary, the cloth detection control is omitted. The time and wash water flow (intensity of mechanical fluctuations) during the washing and rinsing process are determined depending on the cloth properties detected.

Step 309

Tap water is supplied up to the amount of wash water determined in step 302. Highly concentrated wash water solutions are diluted by water supply to a detergent concentration suitable for washing. In this way, the laundry 32 is locked in the washing water inside the washing-and-dehydrating tank 2 as shown in FIG. 4F.

Step 310

The drive unit 6 is controlled to perform the washing process by the wash water flow and washing time set in step 308.

Hereinafter, the relationship between the time of the washing process, the cleanliness, and the tangle rate of the laundry will be described.

9 shows the relationship between washing time and cleanliness. In the washing process, mechanical forces are applied to the laundry 32 by rotating the stirring impeller 4 in the forward and reverse directions to remove dirt attached to the laundry. In addition, the chemical cleaning power of the detergent acts at the time of the laundry (32). The characteristic curve 901 shows the relationship between the washing time and the cleanliness when the washing process is performed without the process of soaking the laundry 32 with a high concentration detergent solution and soaking the laundry. The relationship between washing time and cleanliness is shown when the laundry 32 is carried out after the process of soaking the laundry with a high concentration detergent solution and soaking the laundry. In this embodiment, since the washing process is performed after the washing of the laundry 32 with the high concentration detergent solution and the washing of the laundry, the relationship between the washing time and the cleanliness shown by the characteristic curve 902 can be obtained. Therefore, a small mechanical force can be used to obtain the required cleanliness within a predetermined time.

Fig. 10 shows the relationship between the washing time and the entanglement rate of the laundry. The characteristic curve 1001 shows the relationship between the washing time and the entanglement rate of the laundry when the washing process is performed using a smaller mechanical force, and the characteristic curve 1002 shows the washing machine with the larger mechanical force. The relationship between the washing time and the entanglement rate of the laundry when carried out using is shown. Since the mechanical force during the washing process is proportional to the magnitude of the stirring force (angle of forward and reverse rotation) of the stirring impeller 4, the angle of rotation of the stirring impeller 4 becomes large to generate a large mechanical force, and As a result, the entanglement rate of laundry becomes large. In this embodiment, since the required cleanliness is achieved with a small mechanical force, the washing process can be carried out with the entanglement rate of the laundry shown by the characteristic curve 1001, so that an entanglement rate of 10% or less can be obtained. do.

Step 311

The wash water is drained out of the washing machine by opening the drain solenoid valve 27.

Step 312

A predetermined amount of rinse water (tap water) is supplied to the washing machine by opening the water supply solenoid valve 20.

Step 313

The rinsing process is performed by controlling the drive unit 6.

Step 314

The rinse water is drained out of the washing machine by opening the drain solenoid valve 27.

Step 315

The water contained in the laundry 32 is dehydrated by centrifugal force by rotating the washing and dewatering tank 2 at high speed, but the drain solenoid valve 27 is left open. In the state where dehydration by centrifugal force is completed, the laundry 32 is pressed and attached to the side wall of the washing-and-dehydration tank 2.

Step 316

The washing and dewatering tank 2 is rotated in the forward and reverse directions at a low speed, but the blower 23 uses the heater 24 to heat the air sucked in through the suction port 22 and then the air injection duct 25 It is operated to blow the hot air into the washing and dehydration tank (2) through. The hot air blown into the washing and dewatering tank 2 dries the laundry 32 by removing moisture from the laundry 32 in the washing and dewatering tank 2 and discharges the removed water out of the washing machine. If the laundry 32 is kept dehydrated by centrifugal force, which is pressed against the sidewall of the washing and dehydrating tank 2 and dried, wrinkles will occur in the laundry 32, because the hot air drying Because it takes more than 100 minutes. Therefore, the laundry 32 is dried by periodically moving the stirring impeller 4 in the forward and reverse directions during hot air drying.

During drying, the humid air 34 flows through the dewatering hole 2a provided in the side wall of the washing and dewatering tank 2, and the gap between the outer drum 5 and the washing and dewatering tank 2, and then Exhaust to the outside of the washing machine.

If the entanglement rate of the laundry is 10% or less, uneven drying and wrinkling can be prevented even when hot air drying is performed immediately after completion of the final dehydration.

Although the embodiment described above is a case of a fully automatic laundry dehydrator, in the case of a washing machine without a drying function, the control of the washing machine can be similarly performed by eliminating the hot air drying mechanism and the hot air drying control process.

In addition, in the washing and rinsing process, a mode different from the above-described mode may be employed.

In addition, a previously prepared high concentration detergent solution having the above-mentioned concentration may be used as the high concentration detergent solution.

According to the present invention, the chemical cleaning power of the detergent can be effectively exerted by soaking the laundry with a high concentration detergent solution having a detergent concentration of 5 to 30 times the concentration of the wash water, as a result, the mechanical force acting on the laundry effectively Can be reduced.

In addition, according to the present invention, in a fully automatic washing machine for drying the dehydrated laundry in the washing and dewatering tank by blowing hot air into the washing and dewatering tank, the laundry has a high concentration having a detergent concentration of 5 to 30 times the concentration of the washing water. Soaking with detergent solution allows the chemical cleaning power of the detergent to be effectively used, which in turn reduces the mechanical forces acting on the laundry during the washing process, thereby reducing the entanglement of the laundry in the wash and dehydration baths without compromising removal. As a result, uneven drying can be reduced.

Further, according to the present invention, a high concentration detergent solution having a predetermined detergent concentration is produced by dissolving an amount of powder detergent set in accordance with the detected laundry amount, and as a result, both a high concentration detergent solution and washing water having a desired detergent concentration are produced. Powder detergents can be used efficiently.

Claims (18)

By rotating the stirring blade, the mechanical force is applied to the laundry clothes in the washing and dewatering tank to perform each step of washing with washing water and rinsing with rinsing water, and rotating the washing and dewatering tank to rotate the washing and dehydrating tank. In the washing machine which performs the process of centrifugal dehydration of laundry clothes, A first step of rotating the stirring blade to detect a deceleration characteristic in inertia rotation; A second step of penetrating the laundry detergent in a washing-and-dehydrating tank after the first step to pass the laundry detergent for a predetermined time; A third step of feeding water after the second step to rotationally drive the stirring blade to detect attenuation characteristics in the inertia rotation; Washing machine characterized in that to perform the washing and rinsing process and the dehydration process to apply a mechanical force to the laundry clothes in the wash water diluted with the detergent liquid after the third process. The washing machine according to claim 1, wherein the first step is performed before the first water supply. The washing machine according to claim 1, wherein in the second step, the stirring blade is rotationally driven at each level for supplying water in two stages, and the damping characteristic of the inertia rotation is detected. The washing machine according to claim 1, wherein the detergent concentration of the high concentration detergent liquid is 5 to 30 times the detergent concentration of the wash water in the washing step. The high concentration detergent of claim 1, wherein, in the second step, the laundry and dehydration tank is rotated at a low speed while the laundry clothes are pressed against the sidewall of the washing and dehydration tank by wet and centrifugal dehydration of the laundry clothes in the washing and dewatering tank. A washing machine characterized in that the liquid is sprayed to infiltrate laundry clothes. The laundry dryer according to any one of claims 1 to 5, wherein the washing and dehydrating tank is supplied with warm air to execute a drying step of drying laundry clothes. In the washing machine which infiltrates the laundry detergent in the washing and dewatering tank with high concentration of detergent solution, and then supplies water, performs washing and rinsing process, and then performs dehydration process. A first step of detecting an amount of laundry clothes in the washing and dewatering tank; A second step of penetrating the laundry detergent in a washing-and-dehydrating tank after the first step to pass the laundry detergent for a predetermined time; A third step of detecting water quality of the laundry in the washing-and-dehydrating tank by supplying water after the second step; Washing machine characterized in that to perform the washing and rinsing process and the dehydration process to apply a mechanical force to the laundry clothes in the wash water diluted with the detergent liquid after the third process. 8. The washing machine according to claim 7, wherein the first step is performed before the first water supply. The washing machine according to claim 7, wherein the first step is a step of determining the amount of wash water and detergent, and displaying the determined amount of detergent on the display element. 8. The washing machine according to claim 7, wherein in the second step, the agitating blade is rotated at each level for supplying water in two stages to detect attenuation characteristics in inertia rotation. The washing machine according to claim 7, wherein the second step is a step of determining time and washing water flow in the washing and rinsing step. 8. The washing machine according to claim 7, wherein the detergent concentration of the high concentration detergent liquid is 5 to 30 times the detergent concentration of the wash water in the washing step. The high concentration detergent according to claim 7, wherein in the second step, the laundry and dehydration tank is rotated at a low speed while the clothes are pressed against the sidewall of the washing and dehydration tank by moistening and centrifuging the laundry clothes in the washing and dewatering tank. A washing machine characterized in that the liquid is sprayed to infiltrate laundry clothes. The laundry dryer according to any one of claims 7 to 13, wherein the washing and dehydrating tank is supplied with warm air to execute a drying step of drying laundry clothes. delete delete delete delete