JPH11239696A - Washing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently operate a washing machine by mainly performing a rinsing process. SOLUTION: This washing machine performs a shower rinsing process to rinse a wash by rotation of a spinning tub and water supply into the spinning tub (S7) and when it is judged that permeability of a draining rinsing liquid becomes a prescribed value or more from the detecting result by detecting the permeability of the draining rinsing liquid in the shower rinsing process (S8), water is not uselessly/abundantly consumed by avoiding continuing water supply even after the water content of the wash is put in a saturated state by finishing the water supply into the spinning tub.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing machine capable of operating efficiently, mainly in a rinsing process.

[0002]

2. Description of the Related Art Conventionally, in a washing machine, a rinsing process is performed with a uniquely determined content, number of times, and the like. In the case where the washing and rinsing steps are performed for rinsing the laundry, the water supply is performed at a uniquely determined time and number of times.

[0003]

In the case of the above-mentioned prior art, the rinsing process is not performed efficiently. In particular, in the case of performing the shower rinsing step, when the water content of the laundry becomes saturated, the water flows on the surface of the laundry, does not permeate inside, and remains inside the laundry. Detergent cannot be discharged sufficiently. Even in such a case, since the conventional water supply is continued, water is wasted and much water is consumed, and the rinsing process cannot be performed efficiently. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a washing machine capable of efficiently operating mainly in a rinsing process.

[0004]

In order to achieve the above object, a washing machine of the present invention firstly performs a shower rinsing step of rinsing laundry with rotation of a spin-drying tub and water supply into the spin-drying tub. In one embodiment, the apparatus further comprises a permeability detecting means for detecting the permeability of the discharged rinsing liquid, and in the shower rinsing process, the permeability of the discharged rinsing liquid is equal to or more than a predetermined value based on the detection result by the permeability detecting means. The water supply to the dewatering tub is terminated when it is determined that the condition (1) has been reached (the invention of claim 1).

As described above, in the shower rinsing process, when the water content of the laundry becomes saturated, the water does not penetrate into the laundry and flows on the surface portion, and the laundry is washed. The detergent remaining in the interior cannot be sufficiently discharged. When this occurs, the permeability of the rinse liquid to be discharged is sufficiently high. Therefore, as described above, when it is determined that the permeability of the rinse liquid to be discharged is equal to or higher than a predetermined value, the inside of the dehydration tub is removed. When the supply of water to the water is terminated, the water is not wasted much more, and the shower rinsing process can be performed efficiently.

In addition, in this case, there is provided a water amount measuring means for measuring the amount of water supplied to the dewatering tub, and the control means determines the amount of water supplied thereafter based on the measurement result of the water amount measuring means during the shower rinsing stroke. It is preferable to execute the time-dependent dehydration step (the invention of claim 2). According to this, the dewatering process can be performed for a length of time corresponding to the actual amount of water supplied to the dewatering tank, so that efficient operation can be performed in terms of time.

Secondly, the washing machine of the present invention executes a shower rinsing step of rinsing the laundry by rotating the dewatering tub and supplying water to the dewatering tub, and thereafter performing the dewatering step. A permeability detecting means for detecting the permeability of the dehydrating liquid, and performing control to determine whether or not to execute the shower rinsing step again from the detection result by the permeability detecting means at the time of the dehydrating step. (The invention of claim 3).

According to this method, it is possible to determine whether or not to execute the shower rinsing step again based on the permeability of the dehydrating solution in the dehydrating step after the shower rinsing step. If done,
The permeability of the dehydrating liquid in the subsequent dehydration step is also high, which makes it possible to judge that rinsing has been sufficiently performed in the shower rinsing step. Therefore, in this case, by not performing the shower rinsing step again thereafter, the operation can be efficiently performed in terms of water and time.

Thirdly, the washing machine of the present invention performs a shower rinsing step of rinsing the laundry by rotating the dewatering tub and supplying water into the dewatering tub, and thereafter performing the dewatering step. A permeability detecting means for detecting the permeability of the dehydrating liquid, wherein the content of the subsequent rinsing step is determined in accordance with the detection result by the permeability detecting means during the dehydrating step. (The invention of claim 5).

[0010] According to this, the execution content of the subsequent rinsing step is determined by the permeability of the dehydrating solution in the dehydrating step after the shower rinsing step, and the result of rinsing in the shower rinsing step (rinsing degree) Appears in the permeability of the dehydration liquid in the subsequent dehydration step. Therefore, in this case,
The rinsing step having the contents corresponding to the result of the rinsing in the shower rinsing step is performed thereafter, so that the operation can be performed efficiently in terms of water and time.

Fourth, the washing machine of the present invention performs a rinsing step by draining water after a washing step. The washing machine further comprises a permeability detecting means for detecting the permeability of the drainage liquid. An execution content of a subsequent rinsing step is determined according to a detection result by the transmittance detecting means (the invention of claim 6).

[0012] According to this, the execution content of the subsequent rinsing step is determined by the permeability of the drainage liquid in the draining step after the washing step, and the necessity of rinsing is determined in the draining step after the washing step. Appears in the permeability of wastewater. Therefore, in this case, the rinsing process is performed in accordance with the degree of necessity of rinsing, so that the operation can be efficiently performed in terms of water and time.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. First, FIG. 3 shows the overall configuration of a so-called fully automatic type washing machine. In an outer box 1, a plurality of outer tubs 2 are shown (only one is shown).
Are elastically supported by an elastic suspension mechanism 3 mainly composed of a suspension rod.

An inner tub 4 is rotatably arranged in the outer tub 2. The inner tub 4 is both a washing tub and a dewatering tub. An inner basket 6 (not shown) having a large number of dehydration holes in almost all areas is mounted on the inner periphery of the peripheral side portion. A stirrer 7 is rotatably arranged at the inner bottom of the inner tub 4. The stirrer 7 and the inner tub 4 are selectively rotated for washing (washing, rinsing) and dehydration. The driving mechanism 8 is mounted on the outer bottom of the outer tub 2.

The drive mechanism 8 is, for example, a motor 9 composed of, for example, a single-phase induction motor, a belt transmission mechanism 10 for transmitting the rotational power of the motor 9, and the transmitted rotational power of the motor 9 for washing and spinning. It has a housing 13 in which a clutch 11 for switching and a brake device 12 and a gear reduction mechanism (not shown) are installed. The agitator 7 is rotated forward and reverse during washing, and the inner tub 4 is rotated during dehydration. Is rotated at high speed in one direction. The stirring body 7 generates a washing water flow in the inner tub 4 by its rotation,
The inner tub 4 performs centrifugal dehydration of the laundry by its rotation.

Further, a drainage passage 14 for draining water from the inner tank 4 is provided at the inner bottom of the outer tank 2, and a drainage port 15 at the tip (right side in the figure) of the drainage passage 14 is provided. Has a drain valve 16 attached thereto, and a drain hose 17 is connected to the drain valve 16. Further, the drain port 15 is provided with a transmittance sensor 18 functioning as a transmittance detecting means. The transmittance sensor 18 includes, for example, a light-emitting element 18a and a light-receiving element 18b facing the light-emitting element 18a. Detection is performed based on the degree of arrival at the light receiving element 18b, and a detection signal (voltage) corresponding to the degree of arrival (transmittance) is output.

Further, an air trap 19 is formed integrally with the drain port 15 and an air tube 20 is formed in the air trap 19.
The water level sensor 21 is connected via the. The water level sensor 21 is connected to the air trap 19 and the air tube 20.
, The water level in the outer tub 2 and the inner tub 4 is detected, and is disposed in the top cover 22 mounted on the top of the outer box 1.
Water supply valve 23 functioning as a water supply means for supplying water to the inner tank 4
And a control device 25 composed of, for example, a microcomputer that functions as a control means and also functions as a water amount measurement means.

A liquid-filled balancer 26 is attached to the uppermost part of the inner tank 4, and a ring-shaped cover 27 is attached to the uppermost part of the outer tank 2. Further, the cover 27
Has an inner lid 28 pivotally attached thereto.
A water injection section 29 having a large number of water spray holes is formed, which receives water supplied from the water supply device 24 and diffuses water into the inner tank 4 while showering the water. The top cover 22
Has an entrance (not shown) for taking in and out laundry above the inner lid 28, and has, for example, a two-fold outer lid 30 for opening and closing the entrance.

FIG. 4 schematically shows an electric circuit configuration centered on the control device 25.
For example, various operation signals are input from a switch input unit 31 including various operation switches provided in an operation panel (not shown) provided on the front upper surface of the top cover 22, and the water level sensor 21 detects the water level. In addition to this, a transmittance detection signal is input from the transmittance sensor 18, a cloth amount detection signal is input from the cloth amount sensor 32, and a cloth detection signal is input from the cloth sensor 33. ing.

Based on these inputs and a control program stored in advance, the control unit 25 controls the display unit 34 composed of various display units of the operation panel, the water supply valve 23, the motor 9, and the drain valve. 16
Is supplied with a drive control signal to a drive circuit 35 for driving.

Next, the operation of the above configuration will be described. The control device 25 starts the operation of the washing machine from the standby state in which the power is turned on when the start switch in the switch input unit 31 is operated, and as shown in FIG. The amount of clothes (the amount of laundry) is detected (step S1). Based on the detection result of the cloth amount, the water level is set in accordance with the detection result, and then the water supply valve 23 is opened to execute a water supply process of supplying water to the inner tank 4 to the set water level (step S2). In this water supply process, although not shown, a required time from a certain water level to a certain water level is measured, and an operation of dividing the amount of water between the water levels by the measurement time is performed to calculate a water supply flow rate per unit time.

Thereafter, the cloth quality (the quality of the laundry) is detected by the cloth quality sensor 33 (step S3). Based on the detection result, the strength of the washing water flow and the rinsing water flow, the number of rotations for dehydration, and the like are set. The washing process of washing the laundry by rotating the stirring body 7 with the set contents is executed (step S4). Thereafter, the drain valve 16 is opened to perform a drain step of draining water from the inner tub 4 (step S5), and thereafter, the laundry is dehydrated by rotating the inner tub 4 with the set contents. Execute the dehydration process (Step S
6).

Then, while rotating the inner tub 4 at a low speed, a shower rinsing step of supplying water into the inner tub 4 is executed (step S7), and in this rinsing step, the transmittance of the rinse liquid discharged is measured by a transmittance sensor. 18, and it is determined from the detection result whether the permeability of the rinse liquid to be discharged has reached a predetermined value or more (step S8).

FIG. 5 shows the state of the shower rinsing process. The rotation of the inner bath 4 is, for example, 30 [rpm].
m], water is simultaneously supplied to the inner tank 4 (the water supply valve 23 is opened). The rinse liquid has not yet been discharged from before the shower rinsing step is started to the point where the shower rinsing step is started. Therefore, the permeability sensor 18 detects the permeability of the air at the drain port 15 portion, The degree detection output voltage is, for example, 3.5 [V].

On the other hand, when the shower rinsing process is started, the rinsing liquid is discharged, so that the transmittance sensor 18 detects the transmittance of the discharged rinsing liquid, and the turbidity is immediately measured. Is discharged, the output voltage of the transmittance detection becomes, for example, 0.5
[V].

Thereafter, as the washing of the laundry proceeds, the transmittance of the rinse liquid discharged gradually increases, so that the transmittance detection output voltage of the transmittance sensor 18 also gradually increases.
Then, when the water content of the laundry becomes saturated, as described above, the water does not permeate into the interior of the laundry and flows on the surface portion, thereby sufficiently removing the detergent remaining in the interior of the laundry. Since the liquid is no longer discharged, the permeability of the discharged rinse liquid sharply increases. If the transmittance of the rinse liquid discharged in this way suddenly increases and the transmittance detection output voltage of the transmittance sensor 18 reaches, for example, 3.0 [V], the rinse to be discharged is performed in step S8 described above. It is determined that the liquid permeability has become equal to or greater than the predetermined value (YES), whereby the water supply valve 23 is closed and the inner tank 4 is closed as shown in FIG.
Water supply to the inside is terminated (step S9). The end of this water supply is also the end of the shower rinsing stroke.

In step S8, the permeability of the rinse liquid to be discharged does not exceed a predetermined value (NO).
While the determination is made, the amount of water supplied into the inner tank 4 is measured (step S10), and the process returns to step S7 to continue the shower rinsing process. The measurement of the amount of water supply is performed in the above-described step S.
The water supply flow rate per unit time calculated in 2 is multiplied by a water supply continuation time to perform the calculation. The measurement of the supplied water amount may be performed by using another means such as an integrating flow meter.

After step S9, step S
It is determined whether or not the water supply amount as a result of the measurement at 10 is 12 L (liter) or less (step S11). If it is determined that the water supply amount is 12 L or less (YES), then the dehydration process is performed for 3 minutes, for example. Execute for 30 seconds (step S12).

If it is determined in step SS11 that the water supply is not less than 12L (NO), it is determined whether the water supply amount measured in step S10 is 14L (liter) or less (step S13). ), If it is determined that it is 14 L or less (YES), then the dehydration process is performed, for example, by 4
The process is performed for minute 00 seconds (step S14). Further, if it is determined in the above step S13 that it is not less than 14L (NO: more than 14L), then, for example, a dehydration step is performed for, for example, 4 minutes and 30 seconds (step S15).

Thereafter, the process proceeds to the next step (step S1).
6) For example, the shower rinsing step is executed again with the same contents as described above, and thereafter, the dewatering step is executed again with the same contents as above. FIG. 5 also shows the state at this time, and the dehydration step is performed by, for example, rotating the inner tub 4 at 1000 [rpm]. In addition, with the execution of the dehydration step, the second shower rinsing step, and the second dehydration step, the permeability of the rinse liquid and the dehydrated liquid discharged gradually increases.

Thereafter, for example, a rinsing step (rinsing of laundry by supplying water to the set water level in the inner tub 4 and rotating and driving the stirring body 7 with the set contents)
And finally the dehydration process is performed, and the operation of the washing machine is ended.

As described above, according to the present configuration, during the shower rinsing process, based on the detection result of the transmittance sensor 18,
When it is determined that the permeability of the discharged rinsing liquid has reached a predetermined value or more, the water supply into the inner tub 4 is terminated. In the shower rinsing process, as described above, the water of the laundry is washed. When the water content becomes saturated, the water does not permeate into the laundry and flows on the surface, and the detergent remaining in the laundry cannot be sufficiently discharged. When this occurs, the permeability of the rinse liquid to be discharged is sufficiently high. Therefore, as described above, when it is determined that the permeability of the rinse liquid to be discharged has reached a predetermined value or more, the inner tank 4 By ending the water supply to the inside, the water is not wasted much more, and thus the shower rinsing step can be performed efficiently.

In addition, in the case of the present configuration, the amount of water supplied to the inner tub 4 is measured during the shower rinsing process, and based on the measurement result, the dehydration process is performed for a time corresponding to the amount of water supplied thereafter. If you have. Thus, the dewatering process can be performed for a length of time corresponding to the actual amount of water supplied to the inner tub 4, so that efficient operation can be performed in terms of time.

In step S9, only the water supply is terminated, but the rotation of the inner tank 4 is not stopped. Thereby, the next (steps S12, S14, S1
There is an advantage that the rise of the rotation of the inner tub 4 in each dehydration process of 5) can be quickly performed. However, the present invention is not limited to this. In step S9, the rotation of the inner tank 4 may be stopped.

The shower rinsing step is not limited to the simultaneous rotation of the inner tub 4 and the supply of water to the inner tub 4. For example, at least one of the rotation of the inner tub 4 and the supply of water to the inner tub 4. One may be performed intermittently. Further, the entire washing machine is not limited to a fully automatic type in which the inner tub 4 serves as both a washing tub and a dehydrating tub (a washing machine with both dehydration), and a type having a dehydrating tub separately from the washing tub. May be.

FIGS. 6 to 16 show the second to sixth embodiments of the present invention.
The same parts as those in the embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only different parts will be described.

[Second Embodiment] In the second embodiment shown in FIG. 6, after the dehydration step is executed in step S6, the shower rinsing step is executed for a predetermined time (step S101). The process is also performed at a predetermined time (step S102), and the transmittance of the dehydrated liquid discharged in the dehydration process is further detected by the transmittance sensor 18, and based on the detection result, the drainage is performed. It is determined whether or not the permeability of the dehydrating solution has reached or exceeded a predetermined value (step S10).
3).

In this case, if it is determined in step S103 that the permeability of the dehydrated liquid has reached a predetermined value or more (YES), the process proceeds to the next step (step S104: for example, the rinsing step). If not (NO), the flow returns to step S101 to execute the shower rinsing step again.

That is, in the second embodiment, after the shower rinsing step is performed, the dewatering step is performed. In the second embodiment, the shower rinsing is performed again from the detection result of the permeability of the dehydrated liquid discharged during the dehydrating step. It decides whether or not to perform the process.If the shower rinsing process is sufficiently performed, the permeability of the dehydrating solution in the subsequent dehydrating process is high, and this is the shower rinsing process. It can be determined that the passing has been sufficiently performed. Therefore, in this case, it is possible to operate efficiently in terms of water and time by not performing the shower rinsing step again thereafter.

[Third Embodiment] The third embodiment shown in FIGS.
In this embodiment, the user can arbitrarily set the level (predetermined value) of the transmittance that determines whether or not the shower rinsing step can be executed again in step S103 of the second embodiment.

The reference value (predetermined value) for determining the transmittance in step S103 of the second embodiment is determined by the transmittance sensor 18
The output voltage is, for example, 1.5 [V] shown in FIG. 7, while the permeability detection output voltage of tap water supplied through the water supply valve 23 is 3.0 [V]. The air permeability detection output voltage of the port 15 is 3.5 [V].

On the other hand, the user can set the shower rinsing process from, for example, three stages of "smooth", "standard", and "solid" shown in FIG. Of the transparency level (predetermined value) for determining whether or not the execution of
[V], “Standard” is 1.5 [V], “Solid” is 2.
5 [V]. That is, the more the shower rinsing is performed, the higher the level of the transmittance that determines whether or not to execute the shower rinsing step again,
The execution of the shower rinsing step is repeated as many times.

The operation panel is provided with a display section 41 shown in FIG. 9 as display means. This display unit 41
In addition to having a “preferred rinse” switch 42, the user can select “sudden”, “standard”, “firm”
And light-emitting display elements (eg, LEDs) 44 corresponding to the display characters 43.

With this configuration, every time the user presses the "preferred rinsing" switch 42, the execution level of the shower rinsing is selected and set from "quick", "standard", and "firm". The set level is displayed by the light emission of the light emitting display element 44. By doing so, a rinsing effect according to the user's preference can be obtained. Further, the execution level of the shower rinsing selected and set by the user can be clearly known by looking at the display unit 41.

[Fourth Embodiment] In the fourth embodiment shown in FIGS. 10 to 12, similarly to the third embodiment, step S is performed.
After performing the shower rinsing step of step S101 after the dehydrating step of step 6, in the step of executing the dehydrating step of step S102, the transmittance of the dehydrated liquid discharged during the dehydrating step is detected by the transmittance sensor 18 ( In step S201), the contents of the subsequent rinsing step (step S203) are determined according to the detection result (step S202).

The contents of the determination of the rinsing step executed in step S203 are as shown in FIG. 11, and the permeability of the dehydrated liquid detected in step 201 is large (for example, 2.5 [V] in the output voltage of the permeability sensor 18). If so, a flush rinse shall be performed, and if the permeability of the dehydrated liquid is medium (for example, 1.5 [V] at the same output voltage), a single shower rinse and a flush rinse shall be performed. If the permeability of the dehydrating liquid is small (for example, 1.0 [V] at the same output voltage), two shower rinses and a sample rinse are performed. That is, the smaller the permeability of the dehydrated liquid detected in step 201 is, the more the number of times of shower rinsing is increased and the more careful rinsing is performed.

In this case, the result of the rinsing in the shower rinsing step of step S101 (the degree of rinsing) appears in the permeability of the dehydrated liquid in the subsequent dehydrating step of step S102. A rinsing step having contents corresponding to the result of the rinsing in the rinsing step will be performed thereafter (step S203). Therefore, as the result of the rinsing in the shower rinsing step in step S101 is sufficient, the subsequent rinsing is performed. Go lightly
Water and time are saved, and operation can be performed efficiently.

In this case, the operation panel is provided with a display section 51 shown in FIG. 12 as display means. The display unit 51 includes a “rinse process” display unit 52 indicating that the display content is a rinsing process, a display character 53 indicating the above-described rinsing execution content, and light emitting display elements (eg, LEDs) respectively corresponding to these. 54 and step S2.
02, the execution content of the rinsing determined in
Is displayed by the light emission of. Therefore, in this case, the execution contents of the rinsing determined by the control device 25 can be clearly known by looking at the display unit 51, which is convenient.

[Fifth Embodiment] In the fifth embodiment shown in FIGS. 13 to 15, after the washing step of step S4,
The transmittance of the drainage liquid discharged during the drainage process in step S5 is detected by the transmittance sensor 18 (step 301).
According to the detection result, the contents of the subsequent rinsing step (step S303) are determined (step S302).

The contents of the determination of the rinsing process executed in step S303 are as shown in FIG. 14, and the permeability of the drainage liquid detected in step 301 is large (for example, 2.5 [V] as the output voltage of the permeability sensor 18). In this case, one shower rinse and a reservoir rinse are performed. If the drainage liquid has a medium permeability (for example, 1.5 [V] at the same output voltage), two shower rinses and a reservoir rinse are performed. If the permeability of the drainage liquid is small (for example, 1.0 [V] at the same output voltage), three shower rinses and three-stage rinse are performed.

That is, the smaller the permeability of the drainage liquid detected in step 301 is, the more the number of times of shower rinsing is increased, and the more careful rinsing is performed. In this case, the necessity of rinsing is reflected in the permeability of the drainage liquid in the drainage step after the washing step. The smaller the permeability of the drainage liquid, the more the rinsing must be performed. Therefore, in the fifth embodiment, the rinsing process having the contents corresponding to the necessity of rinsing is performed. Therefore, as the necessity of rinsing is smaller, the subsequent rinsing is performed lightly, and water and time are reduced. Savings and efficient operation are possible.

Also in this case, the operation panel is provided with a display section 61 shown in FIG. 15 as display means. The display unit 61 includes a “rinse stroke” display unit 62 indicating that the display content is a rinse process, a display character 63 indicating the execution content of the above-described rinse, and a light emitting display element (eg, an LED) corresponding to each of these. 64 and step S
The execution content of the rinsing determined in 302 is the light emitting display element 6
4 is displayed. Therefore,
Also in this case, the execution contents of the rinsing determined by the control device 25 can be clearly known by looking at the display unit 61, which is convenient.

[Sixth Embodiment] In the sixth embodiment shown in FIG. 16, the motor for rotating and driving the inner tank 4 is a variable speed motor 71. More specifically, the motor 71 is, for example, an outer rotor type in which a rotor 72 is located outside a stator 73, and a stirring shaft 7 is directly connected to a shaft 74 of the rotor 72, and a hollow shaft 75 through which the shaft 74 is inserted. And a clutch (not shown) between the shaft 75 and the rotor 72 for interrupting the transmission of power from the rotor 72 to the shaft 75 during washing and transmitting the power during spin-drying. Provided.

According to the variable speed motor 71, the inner tub 4 can be driven to rotate at a constant speed, so that the amount of liquid discharged during the shower rinsing step and the dewatering step becomes constant. In addition, it is possible to accurately detect the transmittance thereof, and it is possible to more accurately perform control according to the detection. In addition, the present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications without departing from the scope of the invention.

[0055]

The present invention is as described above.
The following effects are obtained. According to the washing machine of the first aspect, the shower rinsing step does not wastefully consume much water, and the shower rinsing step can be performed efficiently. According to the washing machine of claim 2, the dehydration step after the shower rinsing step can be executed with a length of time according to the actual amount of water supplied to the dehydration tub during the shower rinsing step. Driving can be done efficiently.

According to the washing machine of the third aspect, if the shower rinsing step is sufficiently performed, it is possible to prevent the shower rinsing step from being performed again thereafter, and in terms of water and time, It can drive efficiently. According to the washing machine of the fourth aspect, the level of the transmittance for determining whether or not to execute the above-described shower rinsing step again can be arbitrarily set by the user. A rinsing effect can be obtained.

According to the washing machine of the fifth aspect, the rinsing step having the contents corresponding to the result of the rinsing in the shower rinsing step can be performed, so that the operation can be efficiently performed in terms of water and time. According to the washing machine of the sixth aspect, the rinsing step can be executed in accordance with the necessity of rinsing which appears in the permeability of the drainage liquid in the draining step after the washing step. Can drive.

According to the washing machine of the seventh aspect, the contents of the rinsing determined by the washing machine can be clearly known by looking at the display section. According to the washing machine of the eighth aspect, it is possible to accurately detect the liquid permeability in the shower rinsing step and the dehydration step, and it is possible to more accurately perform control according to the detection.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an operation of a first embodiment of the present invention, part 1;

FIG. 2 is a flowchart 2

FIG. 3 is an overall cutaway side view.

FIG. 4 is a schematic electrical configuration diagram.

FIG. 5 is a time chart showing changes in the rotation speed of the inner tub, opening and closing of the water supply valve, and the permeability of the discharged liquid in the shower rinsing process to the dehydration process.

FIG. 6 is a view corresponding to FIGS. 1 and 2 showing a second embodiment of the present invention.

FIG. 7 is a transmittance detection level diagram showing a third embodiment of the present invention.

FIG. 8 is a diagram showing a relationship between selection contents by a user in a shower rinsing process and a transmittance detection level.

FIG. 9 is a plan view of a display unit showing selection contents by a user in a shower rinsing process.

FIG. 10 is a view corresponding to FIGS. 1 and 2 showing a fourth embodiment of the present invention.

FIG. 11 is a diagram showing the relationship between the degree of permeability of the dehydrating liquid and the content of the execution decision of the rinsing process.

FIG. 12 is a plan view of a display unit showing details of execution determination of a rinsing process.

FIG. 13 is a view corresponding to FIGS. 1 and 2 showing a fifth embodiment of the present invention.

FIG. 14 is a diagram showing the relationship between the permeability of the drainage liquid and the execution decision contents of the rinsing process.

FIG. 15 is a diagram corresponding to FIG. 12;

FIG. 16 is a view corresponding to FIG. 3, showing a sixth embodiment of the present invention.

[Explanation of symbols]

4 is an inner tank (dehydration tank), 8 is a drive mechanism, 9 is a motor, 18
Is a permeability sensor (permeability detecting means), 23 is a water supply valve, 2
4 is a water supply device, 25 is a control device (control means, water amount measuring means), and 51 and 61 are display units (display means).

Claims (8)

[Claims] 1. A washing and rinsing step for rinsing laundry by rotating a spin-drying tub and supplying water into the spin-drying tub, comprising a permeability detecting means for detecting a permeability of a rinse liquid discharged. At the time of the shower rinsing process, when it is determined from the detection result by the permeability detecting means that the permeability of the rinse liquid to be discharged is equal to or more than a predetermined value, control for terminating water supply to the dehydration tub is performed. A washing machine comprising control means. 2. A dewatering process, comprising: a water amount measuring means for measuring an amount of water supplied to the dehydration tank, wherein the control means determines a dehydration step for a time corresponding to the water supply amount thereafter based on a measurement result of the water amount measuring means at a shower rinsing step. The washing machine according to claim 1, wherein the washing machine is controlled to perform the following. 3. A washing and rinsing step for rinsing the laundry by rotating the spin-drying tub and supplying water to the spin-drying tub, and thereafter performing the spin-drying step, wherein the permeability of the dehydrated liquid discharged is detected. Washing characterized by comprising a permeability detecting means, and a control means for performing control for determining whether or not to execute a shower rinsing step again based on a detection result by the permeability detecting means at the time of the dehydration step. Machine. 4. The washing machine according to claim 3, wherein the control means enables the user to arbitrarily set the level of the transmittance for determining whether or not to execute the shower rinsing step again. 5. A washing and rinsing step for rinsing laundry with the rotation of the spin-drying tub and the supply of water into the spin-drying tub, and thereafter performing the spin-drying step, wherein the permeability of the dehydrated liquid discharged is detected. Washing characterized by comprising a permeability detecting means, and a control means for performing control for determining execution contents of a subsequent rinsing step in accordance with a detection result by the permeability detecting means at the time of the dehydration step. Machine. 6. A method of performing a rinsing step by draining water after a washing step, comprising a permeability detecting means for detecting a permeability of a drainage liquid, and detecting by the permeability detecting means at the time of draining. A washing machine comprising control means for performing control to determine the execution contents of a subsequent rinsing step according to a result. 7. The washing machine according to claim 5, further comprising display means for displaying execution contents of the rinsing process determined by the control means. 8. The washing machine according to claim 1, wherein the motor that rotationally drives the dewatering tub is a variable speed motor.