JP3138357B2 - Washing machine - Google Patents

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 washing with a plurality of water flow charts by controlling the operation time of forward / reverse drive of a pulsator during a washing or rinsing operation by a microcomputer. It is.

[0002]

2. Description of the Related Art A fully automatic washing machine is constructed so that a series of washing, rinsing, and dehydrating operation operations are automatically performed under the control of a built-in microcomputer. Various proposals have been made so that good washing and rinsing can be performed for various types of laundry without stopping.

That is, in this type of washing machine, a water flow is generated in a water tub, and washing is performed by stirring the laundry with the detergent in the water flow. However, the water flow in the water tub is unidirectional. In the event that only the occurrence occurs, there is a disadvantage such that the laundry sticks to the inner peripheral surface of the dewatering tub provided in the water tub.Therefore, conventionally, the water flow is inverted a predetermined number of times during the washing operation based on a predetermined program. ing.

[0004] However, clothes and other cloth products to be washed are usually different in thickness, strength, size, size, etc. of the cloth, and the degree of dirt varies greatly depending on the laundry. It is impossible to deal with various types of laundry only by controlling the water flow by using several types of programs, and in fact, a satisfactory finish is not always obtained.

To cope with such a situation, for example, Japanese Unexamined Patent Application Publication No. 4-259493 discloses a washing machine in which a rotating motor (pulsator) is reversed a predetermined number of times by a drive motor during a washing operation. There is disclosed an apparatus in which the rotation speed of the drive motor at the time is detected, and the operation time of the drive motor for the next reversal is set based on the previous rotation speed obtained from the detection unit.

In the above prior art, the control unit sets the operation time of the drive motor every time based only on the detection signal from the rotation detection unit of the drive motor, so that the degree of entanglement of the fabric in the water tank and the water tank are controlled. The degree of clinging of the fabric to the peripheral surface of the dewatering tub provided therein is detected each time, and the rotation speed of the rotary joke can be controlled in accordance with the state at that time.

[0007]

The degree of soiling of cloths and the like washed by a washing machine greatly depends on the degree of soiling of the laundry, the degree of dissolving of the detergent, and the water temperature. According to the control method of the technology, only the degree of tangling of the fabric and the degree of sticking of the fabric to the dewatering tub are only detected, and as the operation control factor of the rotating yoke, the degree of soiling of laundry, the degree of melting of detergent, Since the difference in how dirt is removed depending on the water temperature is not considered, the washing operation cannot always be performed in accordance with the actual condition of the laundry.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the actual condition of the laundry is grasped in consideration of factors such as the degree of soiling of the laundry, the degree of dissolution of the detergent, and the water temperature. It is another object of the present invention to provide a washing machine capable of performing washing according to the actual situation.

[0009]

According to the present invention, there is provided a pulsator which is driven in reverse by a drive motor a predetermined number of times during a washing operation and operates to pump up water in a water tub. And a control unit for setting an operation time of the drive motor, wherein the control unit performs a last inversion drive of the pulsator based on detection signals obtained from various detection units described below. The operation time of the drive motor in the next inversion drive is set.

That is, first, an air trap is provided at a position where the water pressure changes due to the pumping action of the water in the water tank by the pulsator during the washing operation, and based on the air pressure change of the air trap. A water level detecting means for detecting a water level in the water tank is provided, and the operation time of the drive motor is set based on a water level change detection signal obtained from the water level detecting means.

Secondly, in addition to the water level detecting means, a light detecting means for detecting the light transmittance of the water in the water tank is provided, and a light transmittance detection signal of the water obtained from the light detecting means is provided. The operation time of the drive motor is set based on the detection signal of the water level change obtained from the water level detection means.

Thirdly, a rotation operation detecting means for detecting the number of rotations of the drive motor is provided in place of the water level detecting means, and a light detecting means similar to that described above is provided. The operation time of the drive motor is set based on the detection signal of the rotation amount of the drive motor and the detection signal of the light transmittance of the water obtained from the light detection means.

Fourthly, a water level detecting means similar to the above is provided, and a water temperature detecting means for detecting a water temperature in a water tank is provided in place of the light detecting means, and a water level change obtained from the water level detecting means is detected. The operation time of the drive motor is set based on a signal and a water temperature detection signal obtained from the water temperature detection means.

Fifthly, a rotation operation detecting means and a water temperature detecting means similar to those described above are provided, and a detection signal of the rotation amount of the drive motor obtained from the rotation operation detecting means and a signal obtained from the water temperature detecting means are provided. Based on the detected water temperature detection signal, the operation time of the drive motor is set.

Sixth, the same water level detecting means, light detecting means and water temperature detecting means as described above are provided, and a light transmittance detection signal of water obtained from the light detecting means and a water temperature detecting means obtained from the water temperature detecting means are provided. The operation time of the drive motor is set based on the detected water temperature detection signal and the water level change detection signal obtained from the water level detection means.

Seventh, the same rotation operation detecting means, light detecting means and water temperature detecting means as described above are provided, and the light transmittance detection signal of the water obtained from the light detecting means and the water temperature detecting means are provided. The operation time of the drive motor is set based on the obtained water temperature detection signal and the detection signal of the rotation amount of the drive motor obtained from the rotation operation detection means.

[0017]

[Function] The water level detecting means detects the water level in the water tank and monitors whether the pulsator operates according to the reversal chart or not.
The rotation operation detecting means detects the number of rotations of the drive motor. The light detecting means detects the light transmittance of the water in the water tank, that is, the degree of contamination of the water and the degree of melting of the detergent, and the water temperature detecting means detects the temperature of the water in the water tank.

The reversal chart referred to herein means a mode of reversal driving of the pulsator during a washing or rinsing operation. For example, the time for reversing the water flow is set to ON for 2 seconds.
N is set to OFF for 1 second, and this cycle is repeated for a predetermined time as a basic chart. In the present invention, the reversal chart is determined based on the detection signals of the above-described various detection means, and therefore, according to the signals of the light detection means and the water temperature detection means, an aspect according to the actual situation of the laundry at that time. Will be changed.

In the apparatus provided with the water level detecting means, it is monitored whether or not the pulsator is moving in accordance with the reversal chart by the detection signal of the water level detecting means. On the other hand, when the cloth rotation is good, the ON time of the drive motor is corrected to be short, and the cloth is controlled so as to move according to the intended reversal chart.

A water level detecting means or a rotating operation detecting means;
In the apparatus having the light detecting means, the ON time of the drive motor is corrected so as to conform to the cloth by the detection signal of the water level detecting means or the rotation operation detecting means, and the degree of melting of the detergent at the time of washing by the light detecting means. When the degree of dirt is detected and the degree of dirt of the detergent is insufficient or the degree of dirt is increasing, the reversal chart of the pulsator should be strengthened, that is, the ON time of the drive motor should be longer. Control so that

When the water temperature detecting means for detecting the water temperature in the water tank is provided in place of the light detecting means, the ON time of the drive motor is adjusted so as to adapt to the cloth rotation by the detection signal of the water level detecting means or the rotation operation detecting means. After the correction, the water temperature is detected, and when the water temperature is low, the control is performed such that when the water temperature is low, the reversal chart of the pulsator is strengthened, that is, the ON time of the drive motor is lengthened. In the case where both the light detecting means and the water temperature detecting means are provided, the driving motor can be controlled in accordance with the actual situation.

As described above, according to the above configuration, the degree of melting of the detergent, the degree of soiling of the laundry, or the temperature of the water is detected, and based on the signal from the detecting means, the reversal chart of the pulsator is determined, and the operation is started. Based on the signal from the water level detection means or the rotation operation detection means and the signal from the dirt detection means and / or the water temperature detection means, the reversal chart of the pulsator can be corrected, and washing suitable for the actual condition of the laundry can be performed.

Therefore, washing the laundry, the type of detergent, the water temperature,
You can always expect the desired cleaning without being affected by the cloth. In addition, even when rinsing, an optimum rinsing can be expected which is not affected by factors such as sticking of the cloth to the dehydration tank.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a mechanical basic structure of a washing machine according to a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an outer tub. A water tub 2 is provided inside the outer tub 1, and a washing and dewatering tub 3 is rotatably provided inside the water tub 2. Reference numeral 4 denotes a pulsator provided with an impeller on the back side.
It is arranged at a position facing the inner bottom. Further, a drive motor 5 is provided in the outer tub 1 which is further below the bottom of the water tub 2,
A power transmission mechanism 6 is provided.

FIG. 2 is an enlarged view of the drive mechanism. In FIG. 2, a power transmission mechanism 6 switches and transmits the output of the drive motor 5 to one of the washing and dewatering tub 3 and the pulsator 4, and includes a fan pulley 7 attached to an output shaft 5a of the drive motor 5, a pulsator. A washing shaft 8 provided coaxially with 4; a center pulley 9 attached to the shaft end of the washing shaft 8; and a V-belt 10 stretched between the center pulley 9 and the fan pulley 7.
The rotational driving force of the driving motor 5 is transmitted via a fan pulley 7, a V-belt 10, and a center pulley 9.

A magnet 11 is mounted on the lower surface of the center pulley 9 and the magnet 1
A reed switch 12 is mounted at a position opposed to 1 at a predetermined interval, and the magnet 11 and the reed switch 12 constitute a rotation operation detecting means. On the other hand, a cylindrical dehydrating shaft 13 is fitted around the outer periphery of the washing shaft 8, and the lower ends of the washing shaft 8 and the dehydrating shaft 13 are fixed to the center pulley 9, respectively.

The dewatering shaft 13 is divided into an upper half part interlocked with the washing and dewatering tub 3 and a lower half part fixed to the center pulley 9. Are provided so as to freely contact and separate. The spring clutch 14 is linked via a clutch lever 15 to a solenoid 16 attached to the outer bottom of the water tank 2. The washing shaft 8 is also divided into an upper half connected to the pulsator 4 and a lower half fixed to the center pulley 9, and the upper and lower halves are connected via a speed reduction mechanism 17.

Then, when the spring clutch 14 is pressed against the upper and lower halves of the dehydrating shaft 13 by the operation of the solenoid 16, the dehydrating shaft 13 is connected and the rotational force of the drive motor 5 is washed via the center pulley 9 and the dehydrating shaft 13. It is transmitted to the dehydration tank 3. When the spring clutch 14 is separated from the dehydrating shaft 13, the rotational force from the center pulley 9 is not transmitted to the dehydrating shaft 13, and the rotational force is transmitted only to the washing shaft 8. 4 is driven to rotate.

Returning to FIG. 1, reference numeral 18 denotes a cylindrical air trap provided below the outer surface of the water tank 2, reference numeral 19 denotes a pressure guiding pipe connected to the upper part of the air trap 18, and reference numeral 20 denotes a water level constituted by a diaphragm. It is a sensor. Now, assuming that water is being supplied to the water tank 2, the pressure of the air trap 18 increases as the water level in the water tank 2 rises, and the change in the pressure causes the diaphragm of the water level sensor 20 to operate via the pressure guiding pipe 19, Change the oscillation frequency of

Reference numeral 21 denotes a drain pipe drawn out from the bottom of the water tank 2, reference numeral 22 denotes an on-off valve of the drain pipe 21, and reference numeral 23 denotes a drain valve 2.
2 is an optical sensor provided in the upstream pipeline portion, and the optical sensor 23 is a drain pipeline 21 in which the drain valve 22 is closed.
The light transmittance of the water in the water tank 2 that has entered the water tank 2 is detected. In this case, the degree of water contamination or the degree of detergent dissolution can be detected based on the degree of light transmittance.

Reference numeral 24 denotes a control unit built in the washing machine, which is constituted by a microcomputer, and which detects rotation operation detecting means constituted by the magnet 11 and the reed switch 12, the water level sensor 20 and the optical sensor 23. A signal is input.

Next, the operation of the washing machine having the above configuration will be described. When the laundry is put into the washing / dewatering tub 3 and the power switch and the start switch (not shown) are turned on to start the washing operation, the drive motor 5 is energized and the drive of the motor 5 is started. This drive motor 5
Is transmitted to the center pulley 9 via the fan pulley 7 and the V-belt 10, and further transmitted from the center pulley 9 to the pulsator 4 via the washing shaft 8 and the speed reduction mechanism 17.

When the pulsator 4 starts rotating, a pump-up action is generated by the impeller of the pulsator 4, and the pressure in the air trap 18 fluctuates in synchronization with the movement of the pulsator 4. Further, by the rotation of the pulsator 4, the laundry and water in the water tub 2 are stirred by the rotational force of the pulsator 4, and at the same time, the laundry and water act in a direction that hinders the rotation of the pulsator 4.

The reaction caused by the laundry or the water changes the rotation of the pulsator 4, and the change is transmitted to the center pulley 9 via the washing shaft 8. As a result, a change occurs in the positional relationship between the magnet 11 of the center pulley 9 and the reed switch 12 located opposite thereto, and a detection signal based on the change is sent from the reed switch 12 to the control unit 24.

FIG. 3 shows a main routine for operation control in the control section 24. In this figure, the control unit 24
In based on the detection signal from the rotation detecting means detects the laundry amount of the laundry (step # 5), temporarily determines the ON time t ₁ during operation of the drive motor 5 (step # 1
0). That is, in the basic chart, an inversion chart in which the ON time of the water flow inversion performed by inverting the pulsator 4 a predetermined number of times is 2 seconds ON and 1 second OFF is slightly adjusted.

Here, the number of pulses of the reed switch 12 is compared with a preset numerical value, and a water supply valve (not shown) is turned on based on the determination result (step # 15), and water is supplied to the set water level (step # 20). ). After the set water level is reached, the operation is carried out on the reverse chart for one minute, and after a lapse of one minute (step # 25), in the next step # 30, a cloth rotation control subroutine (A) based on the water level detection shown in FIG.
Execute

This subroutine (A) first determines whether the time T from the start of washing is less than 12 minutes in step # 35.
If it is 12 minutes or more, the process proceeds to step # 40, and the next step, here, the operation according to the reversal chart is performed, and if less than 12 minutes, the process proceeds to step # 45.

By the way, even if the amount of the laundry and the amount of the water are the same, the force that hinders the rotation of the pulsator 4 depends on the degree of the cloth entanglement, the hardness of the cloth, and the water of the laundry. The rotation of the pulsator 4 is not constant because it is not constant due to various conditions such as the degree of soaking. Therefore, the pressure in the air trap 18 also does not become constant.

Therefore, in this embodiment, the change in the pressure in the air trap 18 is detected by the water level sensor 2 via the pressure guiding pipe 19.
0, the reference parameter preset by the control unit 24, that is, the reference frequency f of the diaphragm constituting the water level sensor 20, and the measurement value detected by the water level sensor 20 (the oscillation frequency peak value f of the water level sensor 20). ₁ ) and try to compare.

[0040] That is, in step # 45, the calculates the absolute value of the difference between the frequency f and f _1, or the difference exceeds the upper limit value x _f of the frequency difference that is set in advance by the control unit 24, Determine whether or not. If it exceeds here, step #
50 on whether the oscillation frequency peak value f ₁ of the parameter detected by the water level sensor 20 is greater than the reference frequency f, it is determined whether. If not, step # 65
Jump to and return.

When it is determined that the measured value f ₁ detected by the water level sensor 20 is smaller than the reference frequency f, it is determined that the movement of the pulsator 4 is larger than the preset parameter range. Becomes, step #
Proceeding to 55, the ON time t ₁ of the drive motor 5 is set to, for example,
Shorten by one second.

On the other hand, if the movement of the pulsator 4 is smaller than the set parameter range, the operation proceeds to step # 60 to set the ON time t ₁ of the drive motor 5 to, for example,
Increase by 0.1 second. Thereafter, step # 2 shown in FIG.
Returning to step 5, the flow chart after step # 25 is repeatedly executed.

The change range of the control time with respect to the ON time t ₁ of the drive motor 5 may be limited in advance. When the ON time t ₁ of the drive motor 5 changes, the OFF time before the next reversal remains fixed,
It is possible to perform control such as making the last ON time half. The timing for performing the above control can be performed at every reversal or at an appropriate number of reversals in addition to performing control every minute as shown in the flowcharts of FIGS. It is.

FIG. 5 shows a main routine for operation control according to the second embodiment of the present invention. In this embodiment, the control unit 24 performs the light sensor 2 in addition to the control process of the first embodiment at the time of the previous inversion drive of the pulsator 4.
The detection signal of the light transmittance of the water obtained from Step 3, ie, the degree of contamination of the water or the degree of dissolution of the detergent is detected, and the operation time of the drive motor 5 in the next reversal drive is set.

Steps # 105 to # 125 in FIG. 5 are common to the first embodiment and will not be described. However, in this embodiment, one minute has elapsed since the set water level was reached in step # 120. Later (Step # 12
5) In the next step # 130, the cloth rotation control subroutine (B) by the optical sensor 23 shown in FIG. 6 is executed.

In this subroutine (B), it is first determined in step # 135 whether or not the time T from the start of washing is less than 12 minutes.
Then, the process proceeds to step # 170 to jump to step # 170 to perform the cloth rotation control by the subroutine (A). If the time is less than 12 minutes, the process proceeds to step # 145.

In step # 145, a reference parameter B set in advance by the control unit 24 and an actual light sensor 23 are used as parameters when the degree of water contamination in the water tank 2 is detected by the light sensor 23 based on the light transmittance. in comparison operation on the measured values B _1, which is detected, whether the absolute value of the difference exceeds the upper limit value x _B of the difference between the light transmittance preset by the control unit 24 judges whether. If it exceeds, the light transmittance B ₁ detected by the optical sensor 23 in step # 150.
Is larger than the reference value B. If not, the routine jumps to step # 165 and returns.

When it is determined that the measured value B ₁ detected by the optical sensor 23 is smaller than the reference value B, it is determined that the degree of water contamination is smaller than a preset range. , to shorten the ON time t ₁ of the drive motor 5, for example 0.1 seconds proceeds to step # 155. When it is determined to be larger in the opposite to the ON time t ₁ of the drive motor 5 proceeds to Step # 160 long 0.1 seconds.

Thereafter, the subroutine (A) shown in FIG.
Of the drive motor 5 as described above.
After the ON time control of step # 1 is performed, step # 1 shown in FIG.
Returning to step 25, the flow chart of step # 125 and thereafter is repeatedly executed.

FIG. 7 shows a main routine for operation control according to the third embodiment of the present invention. In the present embodiment, the control unit 24 determines the amount of rotation of the drive motor 5 obtained from the rotation operation detecting means constituted by the magnet 11 and the reed switch 12 during the previous inversion drive of the pulsator 4;
The operation time of the drive motor 5 in the next reversal drive is set based on the light transmittance of the water obtained from the optical sensor 23.

That is, in the case of this embodiment, instead of using the water level sensor 20 to detect the cloth rotation state,
The rotation number of the center pulley 9 is read by the rotation operation detecting means composed of the magnet 11 and the reed switch 12 to directly detect the rotation number of the pulsator 4, and this detection data and the detection data of the optical sensor 23 are compared. Control in combination.

Steps # 205 to # 225 in FIG. 7 are common to the first and second embodiments and will not be described. However, in this embodiment, step # 2 is performed.
One minute after reaching the set water level in step 20 (step #
225) Then, in the next step # 230, the cloth rotation control subroutine (C) is executed by the rotation operation detecting means shown in FIG.

In this subroutine (C), it is first determined in step # 235 whether or not the time T from the start of washing is less than 12 minutes.
Then, the process proceeds to step # 270, and jumps to step # 270 to perform the cloth rotation control by the subroutine (B). If less than 12 minutes, the process proceeds to step # 245.

In step # 245, the reference rotation speed F of the drive motor 5 set in advance by the control unit 24 is used as a parameter when the state of rotation of the cloth in the water tank 2 is detected by the rotation operation detecting means by the movement of the pulsator 4. And the measured value F ₁ actually detected by the rotation operation detecting means are compared and calculated.
Whether the absolute value of the difference exceeds the upper limit value x _F of the rotational speed difference that is set in advance by the control unit 24 judges whether. If exceeded here, or measuring the rotation speed F ₁ in step # 250 is larger than the reference rotational speed F, determines whether. If not, the routine jumps to step # 265 and returns.

[0055] Then, when detected by the rotation operation detecting unit measuring rotational speed F ₁ is determined to be smaller than the reference rotational speed F, the movement of the pulsator 4 is determined to have greater than a preset range That is, step # 255
Then, the ON time t ₁ of the drive motor 5 is reduced by 0.1 second. Conversely, the longer 0.1 seconds ON time t ₁ of the drive motor 5 proceeds to Step # 160 when it is determined that the movement of the pulsator 4 is small.

Thereafter, a subroutine (B) shown in FIG.
Of the drive motor 5 as described above.
After performing the ON time control of Step # 2 shown in FIG.
Returning to step 25, the flow chart of step # 225 and thereafter is repeatedly executed.

FIG. 9 shows a main routine for operation control according to the fourth embodiment of the present invention. In the present embodiment, in addition to the configuration of FIG.
A water temperature sensor 25 for detecting a water temperature in the inside is provided, and a detection signal of the water temperature sensor 25 is input to the control unit 24.

In the control unit 24, the driving in the next inversion driving is performed based on the water level obtained from the water level sensor 20 at the previous inversion driving of the pulsator 4 and the water temperature in the water tank 2 obtained from the water temperature sensor 25. The operation time of the motor 5 is set.

Steps # 305 to # 325 in FIG. 9 are common to the first to third embodiments and will not be described. However, in this embodiment, step # 3 is used.
One minute after reaching the set water level in step 20 (step #
325) Then, in the next step # 330, the cloth rotation control subroutine (A) by the water level sensor 20 shown in FIG. 4 is executed.

After the completion of the subroutine (A), the cloth rotation control subroutine (D) by the water temperature sensor 25 shown in FIG. 10 is continuously executed. In this subroutine (D), first, in step # 335, it is determined whether or not the time T from the start of washing is less than 12 minutes. If it is 12 minutes or more, the process proceeds to step # 340, and the next step, here, step Jump to # 370 to perform the cloth rotation control by the subroutine (A). If less than 12 minutes, step #
Proceed to 345.

In step # 345, the water temperature in the water tank 2 is detected by the water temperature sensor 25 as a parameter.
The reference water temperature A set in advance by the control unit 24 is compared with a measured value A ₁ actually detected by the water temperature sensor 25, and the absolute value of the difference is determined by the upper limit value x of the temperature difference set in the control unit 24 in advance. It is determined whether or not _A is exceeded. If exceeded, where the measurement temperature A ₁ is the reference temperature A at step # 350
It is determined whether it is greater than or not. If not, the routine jumps to step # 365 and returns.

When it is determined that the measured water temperature A ₁ detected by the water temperature sensor 25 is higher than the preset range of the reference water temperature A, the routine proceeds to step # 355, where the ON time t ₁ of the drive motor 5 is set. For 0.1 second. Conversely, the ON time t ₁ of the drive motor 5 proceeds to step # 360 to lengthen 0.1 seconds when it is determined that the coolant temperature is low. Thereafter, the process returns to step # 325 shown in FIG.
325 and thereafter are repeatedly executed.

The cloth rotation control by the water temperature sensor 25 can be applied not only at the time of washing operation but also at the time of rinsing.

FIG. 11 shows a main routine for operation control according to the fifth embodiment of the present invention. In this embodiment,
In the control unit 24, based on the rotation amount of the drive motor 5 obtained from the rotation operation detecting means at the time of the previous inversion drive of the pulsator 4 and the water temperature of the water tank 2 obtained from the water temperature sensor 25, The operation time of the drive motor 5 is set.

Steps # 405 to # 425 in FIG. 11 are common to the first to fourth embodiments. Further, in this embodiment, after one minute has passed since the set water level was reached in step # 420 (step # 425),
In the next step # 430, a cloth rotation control subroutine (C) by the rotation operation detecting means shown in FIG. 8 is executed. After the completion of the subroutine (C), step # 435 is continued.
Then, a cloth rotation control subroutine (D) by the water temperature sensor 25 shown in FIG. 10 is executed.

FIG. 12 shows a main routine for operation control according to the sixth embodiment of the present invention. In the present embodiment, in the control unit 24, the light transmittance of the water obtained from the optical sensor 23 at the time of the previous inversion drive of the pulsator 4, the water temperature obtained from the water temperature sensor 25, and the water level obtained from the water level sensor 20. The operation time of the drive motor 5 in the next inversion drive is set based on the three detection data.

Steps # 505 to # 525 in FIG. 12 are common to the first to fifth embodiments. Further, in the present embodiment, one minute has passed since the set water level was reached in step # 520 (step # 425).
In the next step # 530, the cloth rotation control subroutine (B) by the optical sensor 23 shown in FIG. 6 is executed, and subsequently in step # 535, the water temperature sensor 25 shown in FIG.
The subroutine (D) for cloth rotation control by the water level sensor 20 shown in FIG. 4 is further executed at step # 540.

FIG. 13 shows a main routine for operation control according to the seventh embodiment of the present invention. In the present embodiment, the control unit 24 uses a rotation operation detecting means as control detection data instead of the water level sensor 20 in the sixth embodiment. The other processes are the same as those in the sixth embodiment. Therefore, in the final step # 640, the cloth rotation control subroutine (C) by the rotation operation detecting means shown in FIG. 8 is executed.

As in the sixth and seventh embodiments, the optical sensor 2 is used as a detecting means for controlling the ON time of the drive motor 5.
By using both the water temperature sensor 3 and the water temperature sensor 25, a washing operation corresponding to the actual condition of the laundry can be further performed.

[0070]

As described above, in the case of the present invention, unevenness in washing of the operation time control and damage to the cloth due to excessive washing.
Can be prevented, and the movement of the pulsator during operation can be changed.
Water level change by water level detection means that detects the water level in the water tank.
Drive mode to drive the pulsator.
Of the drive motor compared to those that detect the rotation speed of the motor
Variations in the detection components that detect the number of turns and variations during assembly
The pulsator movement during operation is not affected by
Change can be detected reliably, and can be reliably detected at the beginning of the laundry entanglement during washing or rinsing operation, and the entanglement can be easily unraveled by reversing drive. , upon its, because the water level detecting means is always provided in the washing machine, the water level detection means can a corresponding by software without any additional components by using, it is easily added features I can do it.

A plurality of detecting means including water level detecting means
By using the detection signals obtained from the stage, the dirt and the water temperature of the water can be changed washing physician cloth around efficient washing can be expected. Furthermore, even when laundry or detergent, or water or hot water is added during operation, the amount of rotation of the pulsator can be controlled correspondingly, and a washing or rinsing operation according to the actual situation of the laundry can be realized. It has excellent effects not seen before.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a mechanical basic structure according to a first embodiment of the present invention.

FIG. 2 is an essential part cross-sectional view showing the drive mechanism.

FIG. 3 is a flowchart of a main routine for operation control in the control unit.

FIG. 4 is a flowchart of a cloth rotation control subroutine based on water level detection.

FIG. 5 is a flowchart of an operation control main routine according to a second embodiment of the present invention.

FIG. 6 is a flowchart of a cloth rotation control subroutine by an optical sensor.

FIG. 7 is a flowchart of an operation control main routine according to a third embodiment of the present invention.

FIG. 8 is a flowchart of a cloth rotation control subroutine based on rotation detection.

FIG. 9 is a flowchart of an operation control main routine according to a fourth embodiment of the present invention.

FIG. 10 is a flowchart of a cloth rotation control subroutine based on water temperature.

FIG. 11 is a flowchart of an operation control main routine according to a fifth embodiment of the present invention.

FIG. 12 is a flowchart of an operation control main routine according to a sixth embodiment of the present invention.

FIG. 13 is a flowchart of an operation control main routine according to a seventh embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Outer tub 2 Water tub 3 Washing and dewatering tub 4 Pulsator 5 Drive motor 6 Power transmission mechanism 7 Fan pulley 8 Washing shaft 9 Center pulley 10 V belt 11 Magnet 12 Reed switch 13 Dehydration shaft 14 Spring clutch 15 Clutch lever 16 Solenoid 17 Reduction mechanism Reference Signs List 18 air trap 19 pressure guide pipe 20 water level sensor 21 drainage pipe 22 drainage valve 23 optical sensor 24 control unit 25 water temperature sensor

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) D06F 33/02 D06F 37/30-37/34

Claims (2)

(57) [Claims] 1. A drive motor, the washing or rinsing while providing a pulsator which is inverted driven based on a predetermined number of times preset inverted chart by the drive motor during operation, the pulse of the washing or rinsing operation of the pulsator
Providing a water level detecting means for detecting a water level change in the water tank by the sweater , at the time of the previous inversion drive of the pulsator,
A washing machine comprising a control unit for setting the operation time of the drive motor in the next reversal drive based on a detection signal obtained from the water level detection means. 2. A drive motor, and a pulsator that is reversely driven by the drive motor a predetermined number of times during a washing or rinsing operation based on a predetermined reverse chart and that operates to pump up water in a water tank. on the other hand, the water level detecting means for detecting a water level change of the water pressure variation within <br/> group Dzu-out before Symbol aquarium change in air pressure provided by the air trapped in a position ranging by pumping action of the pulsator,
Rotation operation detecting means for detecting the number of rotations of the drive motor,
A light detecting means for detecting a light transmittance of water in the water tank; and a plurality of detecting means including a water level detecting means or a water level detecting means among water temperature detecting means for detecting a water temperature in the water tank, further comprising the pulsator At the time of the previous inversion drive, a control unit is provided for setting the operation time of the drive motor in the next inversion drive based on detection signals obtained from the water level detection means or a plurality of detection means including the water level detection means. A washing machine characterized in that: