JPS6116784A - Washing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine that controls washing and rinsing by detecting the permeability of washing liquid in a washing tub.

Conventionally, conventional washing machines are equipped with a transmittance detector that irradiates light from a light-emitting element into the washing liquid and receives the irradiated light with a light-receiving element, and detects a detection output corresponding to the amount of light received by the light-receiving element for a certain period of time. This is averaged, and the turbidity of the detergent liquid or the rinsing liquid is detected based on the average value, and washing control such as setting of washing time and water flow strength, or rinsing time and rinsing is performed according to the detected turbidity. A method has been proposed in which rinsing is controlled by setting the number of times of rinsing. However, there are bubbles caused by the detergent in the washing liquid, and when these bubbles are located in the detection optical path between the light emitting element and the light receiving element, the light transmittance becomes extremely poor, resulting in a low detection output. However, it is not possible to detect the actual turbidity in the washing liquid.Therefore, with the above conventional configuration in which the detection output is detected for a certain period of time and then averaged, the turbidity of the detergent liquid cannot be reliably detected during washing. There was a problem that the degree of rinsing could not be reliably detected during rinsing.

The present invention has been made in view of the above circumstances, and its purpose is to detect the detection output of the permeability detector when there are few or many air bubbles in the washing liquid at the detection position of the permeability detector. By having a configuration that generates a detection output for use and a detection output for rinsing, it is possible to reliably detect the turbidity of the detergent solution, perform accurate washing control, and also reliably detect the degree of rinsing. The purpose of the present invention is to provide a washing machine that allows precise rinsing control.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

First, the schematic structure of a fully automatic washing machine will be described with reference to FIG. 1 is an outer box, 2 is a water receiving tank which is a washing tub elastically suspended within this outer box 1, 3 is a rotating tank disposed inside this water receiving tank 2, and 4 is arranged at the inner bottom of this rotating tub 5. It is a stirring blade installed. Reference numeral 5 denotes a drive mechanism, which is composed of a mechanism section 6 attached to the outer bottom of the water receiving tank 2, a drive motor 7, a bell transmission device 8 for connecting these, and the like, as is well known. The rotation of the motor 7 is transmitted to the stirring blade 4 during washing and rinsing, and to the rotating tank 3 during dehydration. Reference numerals 9 and 10 are a drain port and an overflow port formed in the water receiving tank 2, and the drain port 9 is connected to a drain hose 12 via a drainage solenoid valve 11'', and the overflow port 10
is connected to the drain hose 12. 15 is a permeability detector disposed at the bottom of the water receiving tank 2;
As shown in FIG. 2, a base body 14 made of a translucent material, for example, transparent plastic, has a light emitting part 14a and a light receiving part 14b that protrude from each other and face each other into the water receiving tank 2, and a base body 14 made of a transparent material, for example, a transparent plastic, is mounted inside the light emitting part 14a. The light emitting diode 15 has a light emitting diode 15 as a light emitting element, and a phototransistor 16 as a light receiving element installed in a light receiving part 141).
The light from 5 passes through a detection optical path 17, which is a detection position, and is received by a phototransistor 16.

Now, the electrical configuration will be described according to FIGS. 3 and 4. The transmittance detector 13 includes the light emitting diode 15, the phototransistor 16, and a resistor 19. between the power supply terminal 18 to which the power supply voltage Vcc is applied and the ground.
20 and a capacitor 21, and generates a detection output signal S15 corresponding to the amount of light received by the transistor 16 from the output terminal 15a. Reference numeral 22 is an analog storage device, which is connected to operational amplifiers 23, 24 . Buffer 25. FET26. It is composed of a storage capacitor 27, diodes 28, 29, and resistors 50 and 31, and a detection output signal S's is applied to an input terminal 22a. and,
This storage device 22 has an output terminal 22b that generates a storage signal M22 and a reset terminal 22G to which a reset signal R61 is applied, as will be described later. 32 is a washing permeability detection device which includes the storage device 22 as a part of its configuration;
It comprises a comparison device 35 and a delay device 54. The comparison device 53 includes resistors 55 to 57 and an operational amplifier! +8
The storage signal M22 and the detection output signal F3ts are applied to the input terminals 53a and 35'b, respectively.

Then, this comparator 55 converts the storage signal M22 into a resistor 5.
By dividing the voltage by 5.37 and applying, for example, 75% of the value as a reference signal Sss to the positive input terminal of the operational amplifier 58, this reference signal S55 and the resistor 56
The detection output signal S's is applied to the negative (-) input terminal of the operational amplifier 58 via the detection output signal S's.
5 is smaller than the reference signal S5s (S s 3<S s s
)cr) At times, a high level H output signal P53 is generated from the output terminal 550, and when the detection output signal S13 is larger than the reference signal S55 (51s>5sz), the output signal P53 is generated from the output terminal 550.
It is designed to generate an output signal pss of low level /l/I from 5C. Further, the delay device 54 is connected to the power supply terminal 1
8 and a power supply terminal 59 to which a power supply voltage vEz is applied. It is composed of a capacitor 44, a diode 45, and an operational amplifier 46, and when the output signal Pss of level A/H is applied from the comparator 53 to the input terminal 34a, the output terminal 34b is output after a certain period of time Ta.
The output signal for washing, the detection output signal Ss4, is set to high level.
She started changing from H to low level and started to cum.

Reference numeral 47 denotes a rinsing transmittance detection device which is part of the storage device 22t, and includes a comparison device 48 and a delay device [49]. Comparator 48 includes resistors 50 to 5
2 and an operational amplifier 55, and its input terminal 4
The previous Ita storage signal M22 and the detection output signal S13 are applied to 8& and 48b, respectively. The comparator 48 then transfers the storage signal M22 to the resistor 50.
For example, 75% of the voltage is divided by 52 and used as the reference signal 8.
4a) is applied to the negative input terminal of the operational amplifier 53), and this reference signal S4[1 is compared with the detection output signal S1s applied to the positive input terminal of the operational amplifier 55 via the resistor 51 to determine the detection output. Signal S's is reference signal 8
When the value is smaller than 4g (S1i<548), the output terminal 48
Generates output signal P4a of low repe/l/L from C',
Detection output signal S1s is larger than reference signal S4a ts1s
>s4g), the output terminal 480 generates a high-repe pH output signal P48. Further, the delay device 49 includes resistors 54 to 57 . connected between the power supply terminal 18 and the ground. Capacitor 58. It is composed of a diode 59 and an operational amplifier 60, and when the low level/I/L output signal P48 is applied from the comparator 48 to the input terminal 49a, the output signal of the output terminal 49b is the rinsing detection output signal S4? is immediately set to low level /L/L, and thereafter the low level lL/L is continued for a certain period of time T'b, and after the elapse of the certain period of time T'b, high level 7 level μ is applied to the input terminal 49a.
The rinsing detection output signal S49 is not set to a high level H unless the high output signal P48 is given. Reference numeral 61 denotes a control device consisting of a microcomputer, and the detection output signals Ssa and S49 are applied to input terminals 61a and 61b, respectively.

This control device 61 executes a washing operation consisting of a series of steps from water supply, washing to dehydration, and when a start button (not shown) is pressed, a high level H water supply command signal S6s is generated from an output terminal 61r. ≠When the water level in the water receiving tank 2 reaches a specified level, a low level/L/L water supply command signal S65 is generated9, and in the washing and rinsing processes, a forward rotation command signal is generated from the output terminals 61C and 61d. Sya and reverse rotation command signal Syb are generated alternately at predetermined time intervals.During the drainage process, a high level/l/H drainage command signal S is output from the output terminal 61e.
Furthermore, in the dewatering process, the output terminal 61e generates a high-level IJH drainage command signal S11, and the output terminal 61C generates a high-level H forward rotation command signal Sya. Also, during the washing process, rinsing process, and dehydration process, husband display command signals are generated from the output terminals 61g, 61h, and 611.

Furthermore, in the washing process, the control device 61 receives a detection output signal S applied to the input terminal 61a as described later.
Based on S4, the washing control such as the setting of the washing time or the water flow (strong water flow, 9 weak water flow), etc. is determined, and in the rinsing process, the detection output signal S4? is applied to the input terminal 61b as described later. Based on this, rinsing control such as rinsing time, number of rinsing, or rinsing method (pre-rinsing, water rinsing) settings are determined and executed.

Then, a water supply command signal S6 of high level /L/](t low level /l/L) is output from the output terminal 61e of this control device 61.
6 is applied to the reset terminal 22C of the storage device 22 as a reset signal R61. 62 is a drive device, its input terminals 621L, 621), 6
20 and 62ti are the forward rotation command signal S7a, the reverse rotation command signal Syb, the water supply command signal Sas, and the drainage command signal S.
11 are given to each person. When the forward rotation command signal Sya of high level yvH is applied to the input terminal 62a, this drive device 62 energizes the forward rotation terminal 7a of the drive amount -7 through the output terminal 62e to drive the drive motor 7. Rotate in the forward direction and connect high level A/H to the input terminal 62b.
When the reversal command signal 7b is given, the reversing terminal 7b of the drive motor 7 is energized through the output terminal 62f to rotate the drive motor 7 in the reverse direction, and when the water supply command signal S65 of high repay yvH is given to the input terminal 62C. The water supply solenoid valve 63 that supplies water to the water receiving tank 2 through the output terminal 62g is energized and opened, and when the high level iVH drainage command signal S11 is given to the input terminal 62d, the water supply solenoid valve 63 is opened through the output terminal 62h. A trap is provided so that the valve 11 is energized and opened. 64, 65 and 66 are wash indicators.

A rinse indicator and a dehydration indicator are provided with display command signals from the output terminals 61g, 61h, and 611 of the control device 61, respectively, and are turned on.

Next, FIGS. 5 and 6 will explain the operation of this embodiment with the above configuration.
This will be explained with reference to the figures.

First, when laundry is put into the rotary tub 3 together with detergent and a start button (not shown) is pressed, the control device 61 outputs a high-reply/
A water supply command signal Sbs of 1/H is generated, whereby the water supply solenoid valve 63 is energized and water is supplied into the water receiving tank 2 and the rotating tank 5. Also, since the high level IVH water supply command signal Sbs is given to the reset terminal 22C of the storage device 22 as the reset signal R61, the output signal of the buffer 25 is at a high level to H, and therefore the gate of the FET 26 is at ground potential. The FET 26 is not active and has a low impedance between its drain and source. Therefore, the charge in the storage capacitor 27 is FE
Since it is immediately discharged through T26, the transmittance detector 1
5 detection output signal (voltage) S's, storage capacitor 2
7 and the memory signal (voltage) of the memory device 22 M
22 is always the same value. After that, when the water level in the water receiving tank 2 reaches the specified water level, the control device 61 outputs the output terminal 61e.
The water supply command signal S65 is set to the low level A/L (time to)%.Therefore, the water supply solenoid valve 65 is cut off and water supply is stopped. This low level L water supply command signal Sbs is also sent to the storage device 22 as a reset signal R41.
Since it is applied to the reset terminal 22C of the buffer 25
When the output signal of FET 26 is low level/L/L, the gate of FET 26 is at a negative (-) potential, and a high impedance exists between its drain and source. Therefore, the discharge circuit of the storage capacitor 27 is no longer formed, and the voltage between the terminals of the storage capacitor 27 is as follows. will be held. In this case, the light from the light emitting diode 15 passes through the fresh water supplied to the water receiving tank 2 through the detection optical path 17 and is received by the phototransistor 16, so the amount of light received by the phototransistor 16 is significantly smaller than the detection output signal. S15 is shown in Figure 5(d)
The value is high as shown in . Therefore, the storage capacitor 27 stores the permeability of fresh water before and after the end of water supply, that is, the start of washing, for example, just before the start of washing. The stored value of this storage capacitor 27 is then output as a storage signal M22. On the other hand, when the water supply is stopped as described above (time tO), the control device 61 operates from the output terminals 6IC and 61 (i to FIG. 5(a) and ('b).
), a forward rotation command signal Sya and a reverse rotation command signal 571) having a period TC are alternately generated.

In this case, the forward rotation command signal Sya and the reverse rotation command signal S7'
There is a short pause time between the rising and falling points of the mutual high level yvTl.

Thus, a high-level μH forward rotation command signal S7a and a reverse rotation command signal syb are output from the output terminal 61C261d of the control device 61.
The normal rotation terminal 7 of the drive motor 7 alternately generates
a, the reversing terminal 7b is alternately energized, and the drive motor 7 rotates in forward and reverse directions to rotationally drive the stirring blade 4 to generate a reversed water flow, thereby starting the washing process. The rotation of the stirring blades 4 dissolves the detergent into the water and removes dirt from the laundry, so that the turbidity of the detergent liquid, which is the washing liquid, gradually increases. Then, the turbidity, that is, the transmittance of this detergent liquid is detected by a transmittance detector 15. In this case, the detergent solution contains air bubbles caused by the detergent in addition to the dirt removed from the laundry9, and when the air bubbles are present in the detection optical path 17, which is the detection position of the transmittance detector 15, light is emitted. Since the light from the diode 15 is scattered by the bubbles, the amount of light received by the phototransistor 16 becomes extremely small, and the value of the detection output signal S's becomes low. The air bubbles in the detergent solution are lowered to the bottom of the water receiving tank 2 by the stirring water flow during washing, that is, when the stirring blades 4 rotate forward or backward, and when washing is interrupted, that is, when the rotation of the stirring blades 4 is stopped (rest time). Therefore, the detection output signal S15 changes as shown in FIG.
As shown by the solid line and the broken line, the maximum peak value and the minimum peak value alternately change. As a result, when the detection output signal S's has a very small peak value, there are many bubbles in the detection optical path 17 of the transmittance detector 15, and when the detection output signal S's has a very thick peak value, there are few 1/c bubbles in the detection optical path 17. Or even if there is almost no turbidity, when the peak value is very thick, the transmittance detector 15 is detecting the actual turbidity of the detergent solution. Furthermore, the very thick peak value of the detection output signal S13 that detects the turbidity of the detergent solution indicates that when the laundry is heavily soiled, the amount of dirt mixed in the detergent solution gradually increases as time passes. In particular, the level gradually decreases as shown by the solid line in Figure 5 ((1)), and if the laundry is lightly soiled, it may remain mixed in the detergent solution over time. Since the amount of contamination caused by the comparison device 5 does not increase so much, it remains relatively high as shown by the broken line in FIG. 5(d).
The operational amplifier 38 of No. 5 compares the reference signal Sss having a value of 75% of the storage signal M22 with the detection output signal S13,
When S15>S33, output signal P4a is high-repe lv
When it is set to H and S15<SS5, the output signal Pan is set to low repeat/l/L. Therefore, the detection output signal S (5 is the fifth
In the case shown by the solid line in @(d) (when the laundry is heavily soiled), the output signal Pss is as shown in FIG. 5(θ), and the detection output signal S1s is as shown in FIG. 5(d). In the case shown by the broken line (when the laundry is lightly soiled), the output signal P
si becomes as shown in FIG. 5(g).

Then, this output signal Pss is given to the input terminal 52a of the delay device 32, and the delay device 32 outputs the output signal p3.
When s becomes high rep/L/H, the constant time Ta is set to be slightly smaller than the period TC. ) Later, the detection output signal Ss4 becomes low level/L/L, so when the output signal Pss becomes high level H continuously (time t2) as shown in Fig. 5 Cθ), it is detected after a certain period of time Ta. The output signal S54 becomes a low level L, and when the output signal P53 always alternates between a high level H and a low level L as shown in FIG. 5 [f], the detection output signal S5
4 is always at a high level μH as shown in FIG. 5(h). Therefore, the control device 61 detects whether the detection output signal S54 given to the input terminal 61a is at the high level H or low level (TVL) at time tS when a predetermined period of time has elapsed from the water supply end time to. In the case of Heilepe H, the washing time should be set to a long time or the washing water flow should be set to a strong water flow after determining that the laundry is heavily soiled. When the laundry is determined to be lightly soiled, the washing time is set to a short time, or the washing water flow is set to a weak water flow.

When such a washing process is performed at a set time, the control device 61 generates a high-level pH drain command signal S11 from the output terminal 61f for the set time, and the drain solenoid valve 11 is energized. Then, a drainage process is performed. After that, the control device 61 generates the forward rotation command signal Sya of the high rep A4 from the output terminal 61C for a set time, and also generates the drain command signal S11 in the same manner as described above, so that the drive motor 7 rotates in the forward direction. Rotating tank 3
The dehydration process is carried out by rotating and driving. When this dehydration process is completed, the process moves to the next rinsing process.

In this rinsing process, the control device 61 operates as shown in FIG.
), the high-level/vH water supply command signal S65 is generated from the output terminal 61el. Therefore, water is supplied into the water receiving tank 2 in the same way as during the washing process, and this high-level μH water supply command signal Since S65 is applied as a reset signal Rb1 to the reset terminal 22C of the storage device 22, the charge in the storage capacitor 27 is discharged, and the memory during the washing process is reset. Thereafter, when the water level in the water receiving tank 2 reaches the specified water level (time t4), the control device 61 sets the water supply command signal S63 from the output terminal 61e to 7-level yL, and the water supply is stopped. This low level/l/L water supply command signal S43 is given to the reset terminal 220 of the storage device 22, so the memory capacitor 27 stores the permeability of the washing liquid or rinsing liquid before and after the end of water supply, that is, before and after the start of rinsing, for example, just before the start of rinsing. Then, after the water supply ends (time t, 4), the control device 61 outputs the signals from the output terminals 61C, 61a to the output terminals 61C, 61a (FIG. 6) as in the washing process.
As shown in b) and tc), the forward rotation command signal Sya and the reverse rotation command signal S7b are generated alternately, so that the stirring blades 4 are driven to rotate in the forward and reverse directions to generate a reverse water flow.

As a result, the permeability detector 13 generates a detection output signal S13 that detects the permeability of the rinsing liquid and supplies it to the input terminal 48b of the comparator 48. The comparator 48 divides this stored signal M22 with a resistor 50.52 and uses the 75% value as a reference signal S4.
8 to the negative input terminal of the operational amplifier 55. Thus, the operational amplifier 55 compares the reference signal 848 and the detection output signal S15. Therefore, the conditions for completing rinsing during the rinsing process are that the detergent concentration in the rinsing liquid is low and the turbidity of the rinsing liquid is low.If the rinsing liquid has a high detergent content, it will foam well, and if there is little detergent, it will foam poorly. So,
The amount of detergent contained in the rinse liquid can be determined by the amount of bubbles in the rinse liquid, and the turbidity of the rinse liquid can be determined by the permeability of the rinse liquid. After the stirring blade 4 starts rotating, the rinsing liquid becomes approximately uniform over the entire area of the water receiving tank 2 and the rotating tank 5, but the air bubbles, which are affected by the detergent concentration, are When the floating stirring blade 4 begins to rotate, it gradually descends. In conclusion, in order to detect the degree of rinsing, it is necessary to detect the timing when the permeability detector 15 detects many bubbles, that is, the minimum peak value of the detection output signal S's.

On the other hand, in the case of insufficient rinsing as in the first rinsing process, the detection output signal S1a changes as the rinsing progresses due to the dirt contained in the laundry and the detergent concentration. ), the comparator 48 generates an output signal P48 shown in FIG. 6 (θ). Therefore, when the output signal P4a reaches the low level IvL (time ts), the delay device 49 sets the detection output signal S49 to the low level IvL as shown in FIG. S49 to low level
The output signal p4a of the comparator 48 will not become vH after the elapse of this fixed time TI (time t6), so the detection output signal 5411 of the delay device 49 will be maintained at vL. After that, it remains at low level, II/L. Therefore, the control device 61 controls the water supply end point (
When a predetermined period of time has elapsed since time 1.4) (time t7-
), the detection output signal S49 applied to the input terminal 61'b is detected, and since this signal is at a low level L, it is determined that the rinsing is in the initial stage or the rinsing is insufficient, and the rinsing time is set to a long time, for example. , the rinsing is controlled and executed by setting the number of rinsing to a large number or setting it to a pre-rinsing. When the rinsing control set as above is carried out and the rinsing is almost completed, when the stirring R4 is rotated after the water supply ends (time j4), the detection by the permeability detector 13 The output signal S13 is as shown by the broken line in FIG. 6(a), and the generation of bubbles in the rinsing liquid has almost disappeared, and the output signal P48 of the comparator 48 is as shown in FIG. 6[g].
As shown in the figure, the detection output signal S49 of the delay device 49 remains at high level/L/H without becoming low level L and continuously at high level/L/H. Therefore, the control device 61 causes the detection output signal S4p given to the input terminal 611) to become high level/at time C ty) after a predetermined period of time.
It is determined that the rinsing is substantially completed because it is 1/H, and the rinsing is controlled by setting the rinsing time to a short time, reducing the number of rinsing, or setting the rinsing to injection rinsing. Thereafter, when such a rinsing process is completed, a final dewatering process is performed in the same manner as described above, and the washing operation is completed.

In this way, according to this embodiment, the washing permeability detection device 3
2, the maximum peak value of the detection output signal S1s of the transmittance detector 13 is used to detect whether or not the detection output signal S1s is the same as the reference signal Sss. The permeability, that is, the turbidity can be detected when the number of air bubbles is at its lowest.Therefore, the error factor of air bubbles is eliminated, and the turbidity of the detergent liquid can be reliably detected, allowing accurate washing control. Further, according to this embodiment, the detection output signal S15, which is the permeability of the washing liquid before and after the start of washing, for example, just before the start of washing, is stored in the storage device 22, and based on the stored signal M22, for example, 75% of the stored signal M22 is stored.
Since the value of is set as the reference signal Sss of the washing transmittance detection device 32, there is no need to correct the temperature of the transmittance detector 13. ) Even if the wall surface becomes dirty, this will not affect the error, and similarly, even if there are manufacturing variations in the transmittance detector 13 and the detection output signals 81s differ from each other, this can be adjusted accurately. It is not necessary or can be left unadjusted.

Furthermore, according to this embodiment, the rinsing transmittance detection device 47
Since it is detected whether the minimum peak value of the detection output signal S1s is smaller than the reference signal 848 by
It is possible to detect when the largest number of bubbles are present in the detection optical path 17 in the rinsing liquid, and therefore the detergent concentration in the rinsing liquid, that is, the degree of rinsing, can be reliably detected, and accurate rinsing control can be performed. According to this embodiment, also in the rinsing process, the detection output signal S's, which is the permeability of the rinsing liquid before and after the start of rinsing, for example, just before the start of rinsing, is stored in the storage device 22, and the detection output signal S's, which is the permeability of the rinsing liquid, is stored in the storage device 22, and the detection output signal S's is For example, the 75% value is determined by the rinsing transmittance detection device 4.
Since the reference signal 84s of No. 7 is used, it is not affected by temperature, dirt on the wall surface, or manufacturing variations as in the case of washing.

Furthermore, according to this embodiment, the transmittance detector 13 and the storage device 22 are provided in common for the wash transmittance detector 52 and the rinse transmittance detector 47.
The configuration is simpler than when they are provided individually.

In the above embodiment, one reference signal Sss is set in the washing permeability detection device 52, but it is also possible, for example, to set reference signals in multiple stages and control washing according to the stages. You can also do this.

Further, in the above embodiment, the washing permeability detection device 62 detects the turbidity of the detergent solution depending on whether the detection output signal S1s is greater than the reference signal Ss3, but the rotation of the stirring blade 4 is temporarily stopped. Washing permeability that detects the detection output signal S15 at the time when air bubbles rise above the water receiving tank 2 when the washing is interrupted, that is, when the washing is temporarily interrupted, or immediately after the washing is restarted after the washing is temporarily interrupted. A detection device may also be provided.

Furthermore, in the above embodiment, the control device 61 determines whether the detection output signal Ssa of the washing permeability detection device 32 is high level/l/H or low level/l/H. The time required to change from L/H to low level IL/L (for example, between time to and ts) may be detected, and washing may be controlled in accordance with that time.

6. Also, in the above embodiment, the rinsing permeability detection device 47 detects the degree of rinsing of the rinsing liquid depending on whether the detection output signal S15 is smaller than the reference signal 84 [1].
The rinsing permeability is such that the rotation of the stirring blade 4 is temporarily interrupted, that is, the rinsing is temporarily interrupted, and the detection output signal S15 is detected at the point when the air bubbles have descended to the lowest point below the water receiving tank 2 immediately before the rinsing is temporarily interrupted. A detection device may also be provided.

Furthermore, in the above embodiment, the control device 61 detects the detection output signal S4? of the rinsing transmittance detection device 47? is determined whether it is low level IvL or high level μH, but the substitute detects the time (for example, between t4 and t5) until the change from high level / l / H to low level μL after the start of rinsing and adjusts the time accordingly. Alternatively, the rinsing may be controlled using the rinsing method.

FIGS. 7 to 9 show a second embodiment of the present invention, and the same parts as in the previous embodiment are designated by the same reference numerals, and only those parts will be described below.

Reference numeral 67 denotes a washing permeability detection device which includes the storage device 22 as a part of its configuration, and is equipped with a peak value detection device 68 and a comparison device 65. The peak value detection device 68 receives the detection output signal S13 at the input terminal 68a and the forward rotation command signal Sya at the reset terminal 68b, and changes the normal rotation command signal S7a from the low level L to the high level. It is reset by the rise to IvH, and the maximum peak value of the detection output signal S15 is sequentially updated and stored and outputted as a peak value signal 5611 from the output terminal 68C. Further, the comparator 35 has input terminals 33a and ! +3bK storage signal M22 and peak value signal 368 are provided, respectively;
Output terminal 53Q to S53 (high-repe/in case of S68)
When L/H and S3δ>868, the output signal Pss of the low repeat lvL is output as the washing detection output signal.

Reference numeral 69 denotes a rinsing transmittance detection device which includes the storage device 22 as a part of its configuration, and is equipped with a peak value detection device 70 and a comparison device 48. The peak value detection device 70 is configured such that the detection output signal S13 is given to the input terminal 70a and the forward rotation command signal S7a is given to the reset terminal 70b.
It is reset by the fall from to low level/l-L, and the minimum peak value of the detection output signal S15 is sequentially updated and stored and outputted from the output terminal 70Q as the peak value signal S7a. Further, the comparator 48 receives the storage signal M22 and the peak value signal Syo to input terminals 48a and 48b, respectively, and outputs a high level /I/H from the output terminal 48C when S4e<S10 and a low level L when S<a>5yoO. The output signal Paa is generated as the rinsing detection output signal.

According to the configuration of the second embodiment, in the washing process, the peak value signal S 6' 8 is the same as the detection output signal S+3 shown in FIG. 8 (cl). ) as shown by the dashed line, so when the peak value signal She becomes smaller than the reference signal Sss (S6s<335), the output signal Pn3, which is the detection output (it), is output as shown in Fig. 8(e).
As shown, the signal changes from high level IVH to low level /I/L, and this is applied to the input terminal 611L of the control device 61. In addition, in the rinsing process, the peak value signal 870 is not as shown by the dashed line in FIG. 9(a) with respect to the detection output signal 815 shown in FIG. is smaller than the reference signal SaB (S70<5
48), the output signal P4a, which is the detection output signal, changes from high level/I/H to low level lvL, and this is applied to the control value [610 input terminal 61'b. Therefore, this 20th embodiment also provides the same effects as the previous embodiments.

In addition, the second ′! In embodiment A, the control device 61 determines that the washing is complete when the difference in the peak value signal 66a detected by the peak value detection bag fi68 during the washing process becomes equal to or less than a predetermined value, stops the pouring process, and then performs the next step. It may also be an in-configuration that controls the washing so that it moves to the process.

Further, in the above embodiment of tg2, the peak value detection device 70 of the rinsing transmittance detection device 69 is controlled by the normal rotation command signal S7.
It was designed to be reset at the time when the water supply command signal 86g falls from the high level /L/■ to the low level L, but in place of this, when the water supply command signal 86g falls from the high level /L/H to the low level A/L. Therefore, in this case, the reading time of the control device 61 (time t in FIG. 6) may be reset.
7') is determined.

Furthermore, in each of the above embodiments, the storage device 22 and the transparency detection device 52, . 47 or 67.69 is provided separately from the control device 61, but in place of this, the transmittance detector 1
The detection output signal S15 of No. 5 is converted into a digital detection signal by an analog-to-digital converter, and the digital detection signal is directly input to a control device consisting of a microcomputer, and the control device itself is equipped with a storage device [22 and a transmittance detection device]. The same function as 52.4''7 or 67.69 may be performed digitally.

In addition, the present invention is not limited only to the embodiments described above and shown in the drawings, but can be modified as appropriate without departing from the scope, such as being applicable not only to fully automatic washing machines but also to washing machines in general. Of course, it can be implemented.

As explained above, this invention can reliably detect the turbidity of detergent solution and perform accurate washing control, and can also reliably detect the degree of rinsing and perform accurate rinsing control. It is possible to provide a washing machine that has an excellent effect of being able to perform the following functions.

[Brief explanation of the drawing]

1 to 6 show a first embodiment of the present invention.
The figure is a vertical cross-sectional view of a fully automatic washing machine, Figure 2 is an enlarged vertical cross-sectional view of a transmittance detector, Figure 5 is a block diagram showing the electrical configuration, and Figure 4 is a specific wiring diagram of the electrical configuration. , Figures 5 and 6
The figure is a waveform diagram of each part for explaining the operation, and FIGS.
FIG. 9 is a diagram corresponding to FIGS. 5 and 6. In the drawing, 2 is a water tank, 7 is a drive motor, 11 is a drainage solenoid valve, 13 is a permeability detector, 22 is a storage device, 27 is a storage capacitor, 52 is a permeability detection device for washing, and 55 is a comparison device. The device, 54, is! Extension device. 47 is a rinsing transmittance detection device, 48 is a comparison device, 49
is a delay device, 61 is a control device 4jL%65 is a solenoid valve for water supply, 67 is a washing permeability detector 468 is a peak value detector, 69 is a rinse permeability detector, 570 is a peak value detector ft- . Figure B, Figure 9

Claims (1)

[Claims] 1. A permeability detector that detects the permeability of the washing liquid in the washing tub, and a permeability detector that detects the permeability of the washing liquid when there are few bubbles in the washing liquid at the detection position of the permeability detector. A washing permeability detection device that detects a detection output and generates a washing detection output based on the detection output; and a washing permeability detector that detects a detection output of the permeability detector when there are many air bubbles in the washing liquid at the detection position of the permeability detector. a rinsing permeability detection device that detects and generates a rinsing detection output based on the rinsing permeability detection device; A washing machine comprising a control device for controlling the washing machine. 2. The permeability detection device for washing and rinsing has a storage device that stores the detection output of the permeability detector before and after the start time of washing and rinsing, and compares the stored value with the detection output to detect the permeability detection device for washing and rinsing. The washing machine according to claim 1, wherein the washing machine generates a detection output for rinsing.