JPH03289998A - Washing and drying machine - Google Patents

Abstract

PURPOSE:To more smoothly enter a dehydrating process carried out through drive of a drum than a conventional type by passively eliminating disarrangement of laundry through control of rotation of a drum when overvibration of the drum due to disarrangement of the laundry during the starting of dehydration is detected. CONSTITUTION:When the vibration widths of a drum 5 and an outer drum 2 exceed an allowable value, a protrusion 14 formed on the upper part of the outer drum 2 presses a vibration width detecting switch 16. When the vibration width detecting switch is turned ON, a signal therefrom is received by a vibration width detecting circuit 21 and inputted to a balance drive control device 24. The bal ance drive control device 24 transmits a control signal, by means of which rotation of the drum 5 is stopped, to a drum drive switching control device 25 when a vibration width detecting switch 21 is turned ON to stop a motor 7. A signal by means of which the drum 5 is then rotated forward for a few seconds and reversed for following few seconds is transmitted to the drum drive switching control device 25 to run forward and reverse the motor 7. Further, a control signal, by means of which the drum 5 is rotated at a low speed, is transmitted to the drum drive switching control device 25 to run the motor 7 at a low speed. Thereafter, through switching of control of the drum drive switching device 25, the motor 7 is run at a high speed by means of a dehydration control signal from a washing dehydration control device 22 to enter dehydration.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a washer/dryer, and more particularly to a dehydration control device for a washer/dryer that performs everything from washing to drying.

[Conventional technology]

Conventionally, a vibration control device for a drum-type washing machine is a motor rotation device that sets the drum speed as follows, as described in Japanese Patent Publication No. 50-16099, that is, the speed at which the laundry rolls within the drum. The machine is equipped with a motor rotating device that is set at a low speed and a high speed for centrifugal dehydration, and is also equipped with a device that detects the vibration amplitude of the drum during low-speed operation. The drum is accelerated from a low speed to a high speed when an amplitude greater than a permissible value is not detected for at least one cycle.

[Problem to be solved by the invention]

However, during spin-drying operation, excessive vibration of the washing drum due to unbalance of the laundry occurs during low-speed rotation, and moreover, occurs during the first rotation.

Therefore, in the conventional technique, it is difficult to obtain an equilibrium state (hereinafter referred to as "balance") of the laundry, and there is a problem in that it is difficult to smoothly proceed to the dewatering process.

The purpose of the present invention is to enable the active dehydration process of the drum to proceed more smoothly than before even when the laundry in the drum is unbalanced, thereby allowing the process from washing to rinsing, dehydration, and drying to proceed smoothly. To provide an improved washer/dryer capable of smoothly transitioning to a previous process.

[Means to solve the problem]

The purpose is to provide a tram for storing laundry, an outer tank that surrounds the drum and stores washing water, a hanging device that elastically holds the drum and outer tank within the outer frame, and a motor that rotates and moves the drum. and a means for detecting an unbalance of the laundry housed in the drum at the time of startup of dehydration, and shifting to high speed dehydration when the vibration amplitude of the drum due to the unbalance is less than a permissible value. In a washer/dryer that performs rinsing, spin-drying, and drying, if excessive vibration of the drum due to the unbalance of the laundry is detected at the start of spin-drying, the unbalance of the laundry is actively controlled by rotation control of the drum. This is achieved by providing means for eliminating laundry imbalance.

[Effect]

According to the present invention having the above configuration, when excessive vibration of the drum due to unbalance of the laundry is detected when starting dehydration using a washer/dryer, the unbalance of the laundry is detected. Equipped with a means to eliminate laundry unbalance by actively controlling the rotation of the drum, even if the laundry in the drum is unbalanced at the beginning of spin-driving operation, the unbalance can be eliminated. By proactively eliminating this problem, it is possible to enter the drum-driven dewatering process more smoothly than before, and the entire process from washing to rinsing, dehydration, and drying can be smoothly transitioned.

〔Example〕

The present invention will be explained below based on the drawings.

FIG. 1 is a longitudinal sectional front view showing the internal structure of a drum type washer/dryer according to an embodiment of the present invention.

In Fig. 1, 1 is an outer frame, 2 is an outer tank suspended inside the outer frame 1 by a support spring 3 and a suspension rod 4, and 5 is a drum rotatably installed in the outer tank 2. , 6 is the laundry loaded into the drum 5, 7 is a motor for rotating the drum 5, 8 is a drum pulley attached to the rotating shaft 9 of the drum 5, 10 is a motor pulley attached to the motor 7, 11 is a drum pulley 9. A drive belt 12, which is hooked between the motor pulley 10 and the drive belt 12, is formed in several layers on the inner peripheral surface of the drum 5.

13 is a glue lid for stirring the laundry 6; 13 is a large number of dehydration holes provided on the circumferential surface of the drum 5; 14 is a protrusion for measuring the vibration amplitude provided in the outer tub 2; 15 is a lid for the drum 5 and the outer tub 2; A vibration width detection switch for detecting vibration amplitude, 16 a water injection valve for injecting washing water into the outer tank 2, 17 a water injection hose that sends washing water from the water injection valve 16 to the outer tank 2, and 18 a water injection hose 2 is a drain valve for discharging the washing water, 19 is a drain hose,
20 is provided inside the outer frame 1 and is used for washing and rinsing.

This is a control device that controls dehydration, drying, etc.

FIG. 2 is a block diagram of a control circuit related to the rotational drive of the drum 5 in the control device 20.

In FIG. 2, the same reference numerals as in FIG. 1 denote the same parts, ie, 7 is a motor for rotationally driving the drum 5, and 15 is a vibration amplitude detection switch for detecting the vibration amplitude of the drum 5 and the outer tank 2.

21 is a shaking width detection circuit connected to the shaking width detection switch S to measure the shaking width; 22 is a washing/dehydration circuit that rotates the motor 7 at low speed for washing and rotates the motor 7 at high speed for dehydration; A control device, 23 is an AC power supply, and 24 is a control device that, before the motor 7 starts high-speed dehydration operation, rotates the laundry 6 in the drum 5 in forward and reverse rotation for a few seconds, followed by low speed. a balance drive control device that performs rotation to eliminate the unbalance; 25;
The washing and dewatering control device 22 causes the motor 7 to rotate at a low speed for washing and dewatering at a high speed, and the balance drive control device 24 causes the motor 7 to rotate in forward and reverse directions.

A drum drive switching control device that switches the drive to eliminate unbalance due to low speed rotation, 26 a timer that sends a time signal necessary for control to the washing/dehydration control device 22 and balance drive control device 24, 27 a motor This is a capacitor for 7.

In the above configuration, the drum-type washer/dryer operates in the order of washing, rinsing, spin-drying, and drying.

For washing, the laundry 6 is put into the drum 5, the water injection valve 16 is opened, and about 173 cm of washing water is poured into the outer tub 2. At the same time, detergent is poured into the outer tank 2.

Then, the washing and dewatering control device 22 is activated to drive the motor 7 at a low speed, thereby rotating the drum 5 at a low speed. When the drum 5 rotates at a low speed, the laundry 6 is lifted up and dropped by the lid 12 provided on the inner surface of the drum 5, and is washed by the action of detergent and washing water, and then rinsed. It is carried out.

For rinsing, the drain valve 18 is opened to drain the washing water after washing to the outside from the drain hose. After closing the drain valve 18, the water injection valve 16 is opened to inject new rinsing water into the outer tank 2. After pouring rinsing water, the washing and dehydration control device N22
, rotate the motor 7 at low speed like washing,
The drum 5 is rotated at low speed. As the drum 5 rotates at a low speed, the laundry 6 is lifted and dropped by the lifter 12, and is stirred and rinsed.

When rinsing is completed, the drain valve 18 is opened, and the rinse water after rinsing is drained to the outside from the drain hose, and dehydration is performed after rinsing.

For dewatering, the washing and dewatering control device 22 is operated to rotate the motor 7 at high speed, thereby causing the drum 5 to rotate at high speed. When the drum 5 rotates at high speed, centrifugal force acts on the laundry 6, and water is separated from the laundry 6 stuck to the circumferential surface of the drum 5 and flows out from the dewatering hole 13 of the drum 5 into the outer tub 2. The water discharged into the outer tank 2 is drained to the outside via a drain valve 18 and a drain hose 19.

The laundry 6 after washing, rinsing, and draining is
Normally, as shown in FIG. 1, the drum 5 is in a biased state, that is, an unbalanced state. Therefore,
When the drum 5 suddenly rotates at high speed and starts dewatering operation,
In many cases, the drum 5 and the outer tank 2 vibrate excessively, causing the safety switch to activate, making it impossible to continue dewatering.

In such a case, in the present invention, the drum is driven to actively eliminate the unbalance of the laundry.

Here, the drum drive control for eliminating imbalance in the embodiment will be explained based on FIG. 3 while referring to FIGS. 1 and 2 above.

That is, FIG. 3 is a flowchart showing drum rotation control at the start of dewatering.

When the laundry 6 is biased or unbalanced in the drum 5 as shown in FIG. 1 at the start of dehydration, the drum 5
When the rotation suddenly enters high-speed dewatering rotation, the drum 5 and the outer tank 2 swing significantly left and right and up and down.

Then, when the swinging width exceeds a permissible value, the protrusion 14 provided at the top of the outer tank 2 presses the swinging width detection switch 16. When the swing width detection switch is turned on, the swing width detection circuit 21 catches the signal and inputs it to the balance canter control device 24. As shown in FIG.
A control signal for stopping the rotation of the tram 5 is sent to the drum drive switching control device 25 to stop the motor 7. Next, the motor 7 is stopped.
A control signal is sent to the drum drive switching control device 25 to cause the motor 7 to rotate forward and reverse for a few seconds and then reverse for a few seconds. Furthermore, a control signal for rotating the drum 5 at a low speed is sent to the drum drive switching control device 25 to cause the motor 7 to rotate at a low speed, and then, by switching the control of the drum drive switching device 25 again, the dehydration control from the washing and dehydration control device 22 is performed. Based on the signal, the motor 7 is rotated at high speed to start dewatering. During this high-speed rotation of dewatering, if the vibration amplitude of the drum 5 and the outer tank 2 is below the allowable value and the amplitude detection switch 15 is not turned on, the high-speed rotation of the dewatering continues.

On the other hand, if the laundry 6 is still unbalanced, the shaking width is greater than the allowable value, and the shaking width detection switch 15 is ON,
Stop the drum drive again.

After correcting the unbalance of the laundry 6 by performing forward rotation for several seconds, reverse rotation for several seconds, and low-speed rotation, high-speed rotation for dewatering begins.

FIG. 4 shows the tram folding control for eliminating the unbalance of the laundry 6, that is, the behavior of the laundry 6 within the drum 5.

(1) in FIG. 4 shows the state of the laundry 6 after rinsing and draining, and the laundry 6 is offset to the lower left in the tram 5. In (1) above, this offset is toward the lower left, but there are also cases where the offset is toward the lower right, and it is also toward the bottom right.

(2) shows the state of the laundry 6 when the drum 5 is rotated in the forward direction for several seconds, and the right end 6a of the laundry 6 is swung to the right by the force of the drum. On the contrary, (3) is the case where the rotation is reversed for several seconds. In (3), the left end 6b of the laundry 6 is swung to the left, and at this point the imbalance of the laundry 6 has been eliminated to a certain extent. (4) is the case where the drum 5 is rotated forward at a low speed at this moment.

In the state (4), the laundry 6 is almost entirely dispersed within the drum 5 and is well balanced in terms of weight. Then, when the laundry 6 is balanced, the drum 5 is rotated at high speed and the dewatering operation is started, as shown in (5). In the state (5), the laundry 6 is dehydrated while clinging to the circumferential surface of the drum 5.

The time for dehydration is measured by the timer 26 shown in Fig. 2 from the start of dehydration, and when the time to end dehydration comes
The signal is transmitted to the washing and dehydrating control device 22. As shown in FIG. 3, the washing and dewatering control device W22 controls the drum to rotate the drum at high speed again to perform dewatering if it is determined that the dehydration is not completed. If a signal indicating the end of dehydration is received from the timer 26 and the determination as to whether the dehydration has ended is YES, the next drying process begins.

Drying is performed using a heater and a blower fan that blow hot air to the drum 5, but these are not shown in FIG. When drying begins, the drum 5 is rotated at low speed and the lifter 12
The laundry 6 is stirred by being given lifting and falling motions. Then, by blowing hot air heated by a heater to the drum 5 and bringing the hot air into contact with the laundry 6, the moisture contained in the laundry is transferred to the hot air, the laundry is dried, and the moisture is removed. The hot, moist air is discharged outside the machine.

That is, in this embodiment, if the laundry 6 in the drum 5 is unbalanced, the drum 5 is shaken for a short time by forward and reverse rotations before rotating the drum 5 at high speed and starting the dehydration operation. The unbalance of the laundry 6 is positively eliminated by applying a dynamic motion, and the laundry 6 is further dispersed in a well-balanced manner within the drum 5 by giving low-speed rotation. As a result, even if the laundry 6 in the drum 5 is unbalanced, the drum-driven dewatering process can be started more smoothly than before, and the laundry can be washed, rinsed, dehydrated, and then dried. The washer/dryer functions can be fully automated.

Next, the second embodiment of the present invention will be explained based on FIG. It is a time chart in which the energization time for rotation and reverse rotation is changed.

In FIG. 5, the horizontal axis shows the elapsed time, and the vertical axis shows the rotational speed (r, p, m) of the drum. The upper part shows normal rotation, and the lower part shows reverse rotation. The energization time for rotation and reverse rotation is t4 seconds.

The time was gradually increased to 7 seconds and 13 seconds.

In addition, as shown in the flowchart of FIG. 3 mentioned earlier, the drum drive control is such that when the swing width detection switch is turned on, the drum rotation is stopped, rotates forward for t1 seconds, and then rotates for t1 seconds.
After rotating in reverse for 1 second and then rotating forward at a low speed, the machine starts spinning at high speed for dehydration, and the shaking width detection switch is turned on again.
If it is ON, next, rotate forward and reverse for t2 seconds, that is, slightly longer than t1, and
Next, after rotating at low speed, high speed rotation for dehydration is started again.

In addition, Figure 5 shows the energization time for forward and reverse rotation of the drum.
When the time was set to 3 seconds, the unbalance of the laundry was resolved, and even during the subsequent spin-driving operation after low-speed rotation, the vibration width of the drum remained below the allowable value, and the shake width detection switch did not turn on, so the spin-drying was completed. This shows an example of moving to high-speed rotation.

That is, according to this embodiment, by changing the energization time for forward and reverse rotation of the drum.

It has been confirmed through experiments that when the current application time is kept the same, the behavior of the laundry in the drum changes depending on the ratio, and the unbalance of the laundry can be resolved at an early stage.

FIG. 6 shows a third embodiment of the present invention, and the same figure shows the rotation between forward and reverse rotations in connection with the control of forward and reverse rotation of the drum for several seconds to eliminate the unbalance of the laundry. This is a time chart with varying speeds.

Therefore, FIG. 6 is similar to FIG. 5.

The horizontal axis is the elapsed time, and the vertical axis is the drum rotation speed (r).

p, m), the top part shows normal rotation, and the bottom part shows reverse rotation. In this example, the rotation speed of the drum normal rotation is
, ta, and the rotational speed of the drum reverse rotation is changed to bl, b2 . b.

In addition, the drum drive control is also controlled by the third
As shown in the flowchart in the figure, when the swing width detection switch is turned on, the drum rotation is stopped and the rotation speed is a0.
It rotates forward for 1 second, then reversely rotates at rotation speed b□ for t1 seconds, then rotates forward at a low speed, and then starts high-speed rotation for dewatering. Here, it is determined whether the shaking width detection switch is ON again and it is turned on.
If N, 7th, perform forward rotation at rotation speed a2,
Subsequently, reverse rotation is performed at rotation speed b2, and after the drum is rotated at low speed forward, high speed rotation of dehydration is started again.

In addition, FIG. 6 shows the rotational speed of the drum in normal rotation as a.

When the rotation speed of the drum reverse rotation is set to b3, the unbalance of the laundry is resolved, and even during the subsequent spin-driving operation after low-speed rotation, the vibration width of the drum remains below the allowable value, and the vibration width detection switch This shows an example in which the dehydration process was moved to high-speed rotation because there was no ONL.

That is, according to this embodiment, by changing the rotational speed of the forward and reverse rotations of the drum, compared to the case where the rotational speeds are the same, the amount of laundry in the drum is reduced as in the embodiment shown in FIG. It has been confirmed through experiments that the behavior of the laundry changes and the unbalance of the laundry can be resolved at an early stage.

FIG. 7 shows a fourth embodiment of the present invention, and the same figure shows the flow of the egg motion system in which the unbalance of the laundry is controlled only by the low speed rotation of the drum.

In order to eliminate the imbalance of laundry, the first
As shown in Figure 3 (the part surrounded by the broken line) of the example, the ideal control is to rotate the drum forward for a few seconds, then reverse for a few seconds, then rotate at a low speed, and then start dewatering. It is.

On the other hand, it has been confirmed through experiments that with the small size and small diameter drums that are required in recent washer/dryers, it is possible to eliminate the unbalance of the laundry by simply rotating the drum at low speed. The operation will be explained based on FIG.

When the vibration width of the drum becomes excessive due to unbalance of the laundry, a vibration width detection switch is turned on to stop the rotation of the drum, and then the drum is rotated at a low speed. And after that,
If the dewatering starts to rotate at high speed again, and the vibration amplitude is still large even in this dehydration state, the amplitude detection switch is turned on again and the drum rotation stops, then the drum rotates at a low speed, and then the dewatering starts at high speed again. to go into.

Note that the rotational direction of the drum low-speed rotation described above may be the same direction as the dehydration, or may be the opposite direction to the dehydration.

Therefore, according to this embodiment, in addition to being able to eliminate the unbalance of the laundry, the control device and the control circuit can be simplified, and the cost of the washer/dryer can be reduced.

FIG. 8 shows a fifth embodiment of the present invention.
This shows the flow when rotating at a low speed of about 100 rpm, and then rotating the drum at a medium speed of 200 to 400 rpm. It is.

Here, the operation of the embodiment shown in FIG. 8 will be explained. As mentioned above, when the laundry is unbalanced and the vibration width of the drum becomes excessive, the vibration width detection switch is turned on. When the swing width detection switch is turned on, the tram stops rotating, and then the drum is rotated at a low speed of about 10 Qrpm.

Then, the drum is further rotated at a medium speed of 200 to 400 rprn, and then the dehydration starts again at high speed.According to experiments, one low speed rotation and one medium speed rotation are performed. It was confirmed that the unbalance of laundry can be resolved by using this method.

As an effect, the dehydration time can be shortened, and according to this embodiment, the dehydration operation is performed smoothly from medium speed to high speed, so the noise during dehydration can be reduced. I can do it.

9 and 10 show a sixth embodiment of the present invention,
FIG. 9 is a cross-sectional plan view showing an example in which two detection switches for detecting the vibration amplitude of the drum and the outer tank are provided, one for detecting the left-right direction and the other for detecting the front-rear direction.

In Fig. 9, 1 is an outer frame, 2 is an outer tank with a built-in drum, 28 (28a, 28b') is a frame fixed to the outer tank 2, and 29 (29a to 29d) are frames 2, respectively.
8, 30 (30a to 30d) are support springs for elastically suspending the outer tank 2 and the frame 28, and 31 (318 to 31d) are support springs 3, respectively.
The hanging rods 32 (32a to 32d) connected to the outer frame 1 are corner fittings on which the hanging rods 31 are hooked, respectively, which are fixed to the four corners of the outer frame 1.

Reference numeral 33 denotes a swing width detection switch (A) fixed to the right side of the outer frame 1 and used to detect the vibration width of the outer tank l in the left-right direction.
This switch (A) 33 corresponds to the switch 15 in FIG. 1, which is the first embodiment of the present invention. 34 is a swing width detection switch (B) fixed to the rear surface of the outer frame 1 and for detecting the vibration width of the outer tank 1 in the front-rear direction; 35 is a detection switch (A) fixed to the frame 28a; A switch protrusion 36 for pressing is fixed to the frame 28b and is a switch protrusion for pressing the detection switch (B) 34.

37 is a loading ring fixed to the front of the outer frame 1 for loading and unloading laundry, 38 is a bellows that seals between the loading ring 37 and the outer tub 1, and 39 is an openable/closable door attached to the front of the outer frame 1. It is.

FIG. 10 is a block diagram of a control circuit related to the drum active control of FIG. 9.

In FIG. 10, numerals 7 to 27 correspond to FIG. 2 of the first embodiment of the present invention. That is, 7 is a motor that rotates the drum, 22 is a washing and dewatering control device that rotates the motor 7 at low speed for washing and high speed for dehydration, 23 is an AC power supply, and 24 is a motor 7 that rotates the motor 7 at a high speed for dehydration. If the laundry in the drum is unbalanced before starting high-speed dewatering operation, a balance opening control device performs forward and reverse rotation for several seconds, followed by low-speed rotation to eliminate the imbalance; Reference numeral 25 indicates low-speed rotation of the motor 7 for washing and high-speed rotation of the spin-drying by the washing/dehydration control device 22, and forward/reverse rotation of the motor 7 by the balance opening control device 24.

A drum drive switching control device which switches the drive to eliminate unbalance due to low speed rotation, 26 a timer which sends a time signal necessary for control to the washing/drying control device 22 and balance opening control device 24, 27 a motor This is a capacitor for 7.

Moreover, 33 is a detection switch (A) corresponding to the above-mentioned FIG.
, 34 is a detection switch (B).

Furthermore, 40 is an amplitude detection circuit for detecting the amplitudes of both the detection switch (A) 33 and the detection switch (B) 34.

In the above configuration, the vibration of the outer tank shown by reference numeral 2 in FIG. 9 during dewatering operation usually oscillates not only in the left-right direction but also in the front-rear direction and in an oblique manner, as shown by 2'. If the horizontal shake is excessive, the outer frame 28
The detection switch (A) is detected by the switch protrusion fixed to a.
Press 33 to turn it on. Further, when the vibration in the longitudinal direction is excessive, the detection switch (B) 34 is pressed and turned ON using a switch protrusion 36 fixed to the outer frame 28b.

Therefore, when either the swing width detection switch (A) 33 or the swing width detection switch (B) 34 is turned on, the swing width detection circuit 40 in FIG. Send that signal. If either the swing width detection switch (A) 33 or the swing width detection switch (B) 34 is ON, the balance drive device 24 operates as shown in FIG. 3 described in the first embodiment. The rotation of the drum is stopped and the tram is then rotated forward for a few seconds and then reversed for a few seconds to correct the unbalance of the laundry in the drum. After that, the drum is rotated at low speed to distribute and balance the laundry throughout the drum, and then the spinning starts again at high speed.

That is, according to the present embodiment, excessive vibration of the outer tub 1 and the drum due to unbalance of the laundry is detected by detecting not only the vibration amplitude in the left-right direction but also the vibration amplitude in the front-rear direction. Unbalance can be detected more accurately, thereby making it possible to more reliably control the unbalance of the laundry and move the drum to the spin-drying process.

11 and 12 show a seventh embodiment of the present invention, and FIG. 11 is a longitudinal sectional front view of a drum-type washer/dryer showing an example in which the vibration amplitude of the drum and outer tub is detected by an acceleration sensor. be.

In FIG. 11, numerals 1 to 20 correspond to FIG. 1 of the first embodiment of the present invention. In other words, 1 is an outer frame, 2 is an outer tank suspended inside the outer frame 1 by a support spring 3 and a suspension rod 4, 5 is a drum rotatably installed in the outer tank 2, and 6 is a drum. 7 is a motor for rotating the drum 5; 8 is a drum pulley attached to the rotating shaft 9 of the drum 5; 10 is a motor pulley attached to the motor 7; 11 is a drum pulley 9 and a motor pulley 10; A drive belt 12 hung between the drum 5 and a glue lid 13 for agitating the laundry 6 are coated on the inner peripheral surface of the drum 5.
14 is the outer tank 2.
15 is a vibration amplitude detection switch for detecting the vibration amplitude of the drum 5 and the outer tank 2;
16 is a water injection valve for injecting washing water into the outer tub 2; 17 is a water injection hose that sends washing water from the water injection valve 16 to the outer tub 2; 1;
8 is a drain valve for discharging the washing water in the outer tank 2; 19
2 is a drainage hose, and 20 is a control device that is provided inside the outer frame 1 and controls washing, rinsing, dewatering, drying, etc.

41 is an acceleration sensor fixed to the outer tank 2, and 42 is a sensor wiring for transmitting a signal from the acceleration sensor 41 to the control device 20.

FIG. 12 is a block diagram of a drum drive control circuit using the acceleration sensor 41 of FIG. 11.

In FIG. 12, numerals 7 to 27 correspond to FIG. 2 of the first embodiment of the present invention and FIG. 10 of the sixth embodiment. That is, 7 is a motor that rotates the drum, 22 is a washing and dewatering control device that rotates the motor 7 at low speed for washing and at high speed for dewatering.
23 is an AC power supply, and 24 is an AC power source that, if the laundry in the drum is unbalanced before the motor 7 starts high-speed dehydration operation, performs forward and reverse rotation for several seconds, followed by low-speed rotation to unbalance the laundry. A balance opening control device 25 controls the washing and dehydration control device 22 to cause the motor 7 to rotate at low speed for washing and spin out at high speed, and the balance opening control device 24 to rotate the motor 7 in forward and reverse directions.
26 is a drum drive switching control device that switches the opening operation to eliminate imbalance caused by low-speed rotation; 26 is a timer that sends a time signal necessary for control to the washing/dehydration control device 22 and the balance opening operation control device 24; 27 is a motor 7 is a capacitor. 41 is an acceleration sensor, and 43 is an acceleration measurement circuit for measuring an acceleration signal from the acceleration sensor 41.

Now, to explain the operation of the embodiment shown in FIGS. 11 and 12, in FIG. When the acceleration measured by the sensor 41 exceeds the allowable value, the balance control device 24 shown in FIG. 12 controls the rotation of the drum 5 as shown in FIG. 3 described in the first embodiment. Then, the drum 5 is rotated forward for several seconds, and then rotated reversely for several seconds to eliminate the unbalance of the laundry 6 within the drum 5. After that, the drum 5 is rotated at a low speed, the laundry 6 is dispersed and balanced throughout the drum 5, and then the dewatering starts to rotate at a high speed again.

That is, in this embodiment, as a means for detecting the vibration amplitude of the drum 5 and the outer tank 2, the vibration amplitude detection switch 33.3 shown in FIGS. 9 and 10, which is the sixth embodiment of the present invention, is used.
4, an acceleration sensor 41 is used.

Therefore, the advantages of using the acceleration sensor 41 as a means for detecting the vibration amplitude of the drum 5 and the outer tank 2 are as follows.

That is, when the switches 33 and 34 shown in FIG. 9 and FIG. Since it is necessary to detect vibrations in the longitudinal direction, the installation position is limited, but the 11th
According to the embodiments shown in FIG. 12 and FIG.
Selection of the installation location is easy. Further, according to this embodiment, the vibration amplitude of the outer tank 2 and the drum 5 can be measured by acceleration, and the acceleration data on the way until the vibration amplitude becomes excessive can be obtained, so that the drum drive control can be more advanced. The data can be used effectively when making it into something.

Figures 13 to 15 show an eighth embodiment of the present invention, in which a circuit is added to detect whether the unbalance of the laundry has been resolved based on the input current value of the drum parking motor. FIG. 3 is a block diagram of a drum movement control circuit.

In FIG. 13, reference numerals 7 to 27 refer to FIG. 2 of the first embodiment of the present invention, FIG. 10 of the sixth embodiment, and further, FIG.
This corresponds to FIG. 12 of the embodiment.

That is, 7 is a motor that rotates the drum, 22 is a motor that rotates the motor 7 at a low speed for washing, and the motor 7
A laundry dehydration control device that rotates at high speed for dehydration, 2
3 is an AC power supply, and 24 is an AC power source that, before the motor 7 starts high-speed dewatering operation, if the laundry in the drum is unbalanced, it performs forward and reverse rotation for several seconds, followed by low-speed rotation. A balance cantering control device 25 is configured to control the washing/dehydration control device 22 to cause the motor 7 to rotate at a low speed for washing and to rotate at a high speed for dewatering, and to rotate the motor 7 in forward and reverse directions by the balance gearing control device 24.
A drum movement switching control device that switches the drive to eliminate imbalance caused by low-speed rotation, 26 is a washing and dehydrating control device N
22 and the balance canter control device 24, a timer transmits a time signal necessary for control; 27 is a capacitor for the motor 7;

44 is connected to the drum opening operation switching control device 25 and is connected to the motor 7.
This is a motor current measurement circuit for measuring the current value of the motor.

Note that this motor current measurement circuit 44 is also connected to the balance salmon movement control device 24 to which the current value data is transmitted.

FIG. 14 is a characteristic diagram showing the relationship between motor load, rotational speed, and torque.

In Figure 14, Tm is the generated torque with respect to the rotational speed of the motor, Ts is the load characteristic when there is a large unbalance in the laundry and therefore a large load, and TA is the load when the unbalance of the laundry is slightly small. characteristics, T
B shows the load characteristic when the unbalance of the laundry is completely eliminated and the drum rotates normally, and Im shows the input current value with respect to the rotational speed of the motor.

As shown in FIG. 14, when the unbalance of the laundry is large, the rotation speed of the motor increases to the rotation point S at the intersection of Ts and Tm, and thereafter the rotation of the motor stops.

Then, the motor current value at the S point is I shown at the S2 point.
It is s. Also, when the unbalance of the laundry becomes slightly smaller, the motor rotation speed is TA and Trr + which intersection point a, and the motor current value at that time is shown at 82 points■^
After that, the motor rotates stably at that rotation speed. Furthermore, when the unbalance of the laundry is completely eliminated and the load becomes light, the rotation speed of the motor is at the intersection point b1 of TB and Tm, and the motor current value at that time is IB indicated by b2. , the motor rotates stably at that rotation speed.

In this way, the motor input current value IB when the laundry is unbalanced and the load is light is smaller than the current value when the laundry is unbalanced and the load is heavy, and in Fig. 14, I s > I^ > i B, and the above characteristics exist between the motor load and the input current.

Here, drum drive control for eliminating imbalance in this embodiment will be explained based on FIG. 15 while referring to FIGS. 13 and 14.

That is, FIG. 15 is a control flowchart for drum drive in this embodiment, including washing and rinsing.

Each step of drying is the same as in the case of FIG. 3 of the first embodiment of the present invention.

In FIG. 15, when the drum is rotated at high speed and dewatering operation is started, and the vibration of the outer tub and drum becomes excessive because the laundry is unbalanced, the shaking width detection switch 15 is turned on.

The balance oscillation control device 24 then stops the drum, then rotates the drum forward for several seconds, and then rotates it reversely for several seconds to eliminate the unbalance of the laundry within the drum. After that, the drum is rotated at a low speed to distribute and balance the laundry over the entire drum, and then the input current value of the motor 7 is measured by the motor current measurement circuit 44, and the current value of the motor is determined as the 14th current value. If the current is below T^ (this is the permissible current value) in the figure, it is determined that the unbalance of the laundry has been resolved, and the drum is again shifted to high-speed rotation for dewatering.

On the other hand, contrary to the above, if the motor current value is larger than the allowable value T^, it is determined that the unbalance of the laundry is still large and the drum is stopped, and the drum is adjusted to correct the unbalance again. Performs rotation, reverse rotation, and low speed rotation. Then, the drum drive to eliminate imbalance,
Repeat until the motor current value falls below the allowable value ■^.

That is, according to the present embodiment, by adding a circuit that detects whether the unbalance of the laundry has been resolved based on the input current value of the drum drive motor 7, which is the direct drive source of the drum, the above-mentioned The moment when the unbalance of the laundry is resolved can be detected in a timely and accurate manner, and the operation of rotating the drum at high speed and transitioning to spin-driving operation can be performed more reliably.

〔Effect of the invention〕

The present invention is as described above, and as is clear from the explanation of the illustrated embodiments, according to the present invention, when starting dehydration using a washer/dryer, vibrations of the drum due to unbalance of the laundry can be prevented. Equipped with a laundry unbalance elimination means that actively eliminates the unbalance of the laundry by controlling the rotation of the drum when an excessive amount of laundry is detected. Even if this occurs, the unbalance can be proactively corrected and the drum-driven dewatering process can be started more smoothly than before, making the entire process from washing to rinsing, dehydration, and drying smoother. 1 that can be transferred to
It is possible to provide an improved washer/dryer with excellent workability.

Note that effects specific to each embodiment of the present invention are as described in the respective embodiment sections.

[Brief explanation of the drawing]

1 to 4 show one embodiment of the present invention, FIG. 1 is a longitudinal sectional front view showing the internal structure of the tram-type washer/dryer according to the present invention, and FIG. 2 is the same as that shown in FIG. In relation to the control device shown, a block diagram of a control circuit explaining the rotation of the drum 5, FIG. 3 is a flow chart showing drum drive control at the start of dewatering, and FIG. 4 is a block diagram of the control circuit to explain the rotation of the drum 5. FIG. 5 is a diagram showing the behavior of the laundry 6 in the drum 5, which shows the second embodiment of the present invention, in which the drum is rotated in the forward direction for several seconds to eliminate the imbalance of the laundry. In connection with reverse rotation control, a time chart showing changes in the energization time between forward rotation and reverse rotation, and FIG. FIG. 7 is a time chart in which the rotational speeds of forward rotation and reverse rotation are changed in relation to forward rotation and reverse rotation control per second. FIG. 8 shows a fifth embodiment of the present invention, and FIG. 8 is a flowchart of a drive system that performs control to eliminate the unbalance of the laundry by rotating the drum at low speed and medium speed. 9 and 10 show a sixth embodiment of the present invention, and FIG. 9 shows a detection switch for detecting the vibration amplitude of the tram and the outer tank. A cross-sectional plan view showing an example in which two devices are provided,
FIG. 10 is a block diagram of a control circuit related to the drum drive control in FIG. 9, and FIGS.
FIG. 11 is a longitudinal sectional front view of a drum-type washer/dryer showing an example in which the vibration amplitude of the drum and outer tub is detected by an acceleration sensor, and FIG. 12 is an example of the acceleration sensor 4 in FIG. 11.
Block diagram of drum drive control circuit using 1, 13th
15 to 15 show an eighth embodiment of the present invention, and FIG. 13 shows a drum oscillation system equipped with a circuit that detects whether the unbalance of the laundry has been resolved based on the input current value of the drum drive motor. FIG. 14 is a block diagram of the control circuit, FIG. 14 is a characteristic diagram showing the relationship between motor load, rotational speed, and torque, and FIG. 15 is a control flowchart for drum drive in this embodiment. 1... Outer frame, 2... Outer tank, 3... Support spring, 4...
... Hanging rod, 5... Drum, 6... Laundry, 7...
- Motor, 14... Switch protrusion, 15... Shaking width detection switch, 20... Control device, 21... Shaking width detection circuit, 22... Washing/dehydration control device, 23... AC power supply , 24... Balance drive control device, 25... Drum drive switching control device, 28 (28a, 28b
) = 7 frames, 29 (29a to 29d) one hanging metal fitting, 30 (30a to 30d)...support spring,
31 (31a-31d)...hanging rod, 32 (32
a to 32d)...Corner fitting, 33...Swing width detection switch (A), 34...Swing width detection switch (B), 35.
...Switch protrusion, 36...Switch protrusion, 40
... Swing width detection circuit, 41 ... Acceleration sensor, 42.
...Sensor wiring, 43...Acceleration measurement circuit, 44...
Motor current measurement circuit. -21 to

Claims (1)

[Claims] 1. A drum for storing laundry, an outer tank surrounding the drum and storing washing water, a hanging device for elastically holding the drum and the outer tank within an outer frame, and rotating the drum. It is equipped with a driving motor and a means for detecting an unbalance of the laundry stored in the drum at the start of dewatering, and shifting to high-speed dewatering when the vibration amplitude of the drum used to correct the unbalance is less than an allowable value. In a washer/dryer that performs washing, rinsing, spin-drying, and even drying, if excessive vibration of the drum due to the unbalance of the laundry is detected at the time of startup of spin-drying, the unbalance of the laundry is corrected by controlling the rotation of the drum. A washer/dryer characterized by being equipped with means for actively resolving laundry imbalance. 2. In the washer/dryer according to claim 1, if the laundry becomes unbalanced at the start of spin-drying, and the vibration width of the drum becomes larger than the allowable value and the vibration width detection switch is activated, the rotation of the drum is temporarily stopped. After the drum is stopped, the drum is rocked by forward rotation and reverse rotation for a few seconds, followed by low-speed rotation to actively eliminate the unbalance of the laundry, and then the balance drive of the drum is activated. A washer/dryer equipped with a means to switch to dehydration control and rotate the drum at high speed. 3. The washer/dryer according to claim 2, further comprising a means for changing the energization time of the motor for forward and reverse rotation of the drum, which imparts an oscillating motion to the laundry in the drum. 4. The washer/dryer according to claim 2, further comprising means for changing the rotational speed of the drum for forward and reverse rotation for imparting oscillating motion to the laundry in the drum. 5. In the washer/dryer according to claim 1, if the laundry becomes unbalanced when starting spin-drying, and the vibration width of the drum exceeds an allowable value and the vibration width detection switch is activated, the rotation of the drum is temporarily stopped. After the drum is stopped, a low-speed rotational motion is applied to the drum to actively eliminate the unbalance of the laundry, and then the balance drive of the drum is switched to dehydration control to rotate the drum at a high speed. Machine. 6. In the washer/dryer according to claim 1, when the laundry becomes unbalanced at the start of spin-drying, the vibration width of the drum becomes larger than the allowable value, and the vibration width detection switch is activated.
After temporarily stopping the rotation of the drum, the drum is given a low-speed rotational motion followed by a medium-speed rotational motion to actively eliminate the unbalance of the laundry, and then the balance drive of the drum is controlled to dewater. A washer/dryer equipped with a means of switching the drum to rotate at high speed. 7. In the washer/dryer according to any one of claims 1 to 6, the vibration width detection switch for detecting the vibration width of the drum includes a switch for detecting the vibration width in the left and right direction of the outer tank, and a switch for detecting the vibration width in the left and right direction of the outer tank. and a switch for detecting the shaking width in the direction, and if any of these shaking width detection switches is activated, the laundry unbalance is actively eliminated by controlling the rotation of the drum. A washer/dryer equipped with actuation means for. 8. In the washer/dryer according to any one of claims 1 to 6, an acceleration sensor is provided in the outer tank as a vibration width detection switch for detecting the vibration width of the drum, and the vibration width of the drum is measured using acceleration data. and, if the measured acceleration is equal to or higher than a permissible value, the laundry unbalance is actively resolved by controlling the rotation of a drum. 9. In the washer/dryer according to any one of claims 1 to 7, a motor current measuring circuit for measuring an input current value of the drum rotation drive motor is connected to and added to the drum balance drive control device and the spin-drying switching control device. At the same time, if the laundry becomes unbalanced and the vibration width of the drum exceeds the allowable value and the vibration width detection switch is activated, the rotation of the drum is temporarily stopped and the unbalanced laundry is detected by the drum. The drum is rotated at high speed to enter dewatering operation only when the measured motor current value is below the allowable value, and on the other hand, when the measured motor current value is above the allowable value. If necessary, the washer/dryer is equipped with means for repeatedly controlling the drum balance drive to eliminate the unbalance of the laundry.